CN110814225B - Full-line-diameter high-voltage cable cutting equipment - Google Patents
Full-line-diameter high-voltage cable cutting equipment Download PDFInfo
- Publication number
- CN110814225B CN110814225B CN201911209045.9A CN201911209045A CN110814225B CN 110814225 B CN110814225 B CN 110814225B CN 201911209045 A CN201911209045 A CN 201911209045A CN 110814225 B CN110814225 B CN 110814225B
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- supporting cylinder
- cylinder body
- wire
- driving
- fixed
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- 238000005520 cutting process Methods 0.000 title claims abstract description 83
- 210000000078 claw Anatomy 0.000 claims abstract description 29
- 239000000178 monomer Substances 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 210000001015 abdomen Anatomy 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
-
- 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
- H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
- H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
- H02G1/1248—Machines
- H02G1/1251—Machines the cutting element not rotating about the wire or cable
- H02G1/1253—Machines the cutting element not rotating about the wire or cable making a transverse cut
- H02G1/1256—Machines the cutting element not rotating about the wire or cable making a transverse cut using wire or cable-clamping means
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
- Sawing (AREA)
Abstract
The invention relates to full-diameter high-voltage cable cutting equipment, which comprises a supporting cylinder body and a fastening claw, wherein a clamping nut is screwed on the supporting cylinder body and drives the fastening claw to complete clamping action, a cutting assembly is arranged at the end part of the supporting cylinder body, the cutting assembly comprises an electric saw cutting machine, a driving motor and a driving ring, the driving ring is rotationally connected at the end part of the supporting cylinder body, the electric saw cutting machine is fixed on the driving ring and rotates along with the driving ring, a wire entering notch is arranged on the supporting cylinder body, the wire enters the supporting cylinder body from the wire entering notch, then the clamping nut rotates to further drive the fastening claw to shrink inwards so as to clamp the wire, the wire is automatically centered, the coaxial center of a wire to be cut section and the supporting cylinder body is ensured, finally, the cutting depth of the electric saw cutting machine is regulated and fixed, and the driving ring rotates to drive the electric saw cutting machine to carry out annular cutting with corresponding depth on the wire, so that the electric saw cutting equipment with a core can be used in the process of overground and aloft work, and the construction efficiency can be greatly improved.
Description
Technical Field
The invention relates to the technical field of cable cutting equipment, in particular to full-diameter high-voltage cable cutting equipment.
Background
At present, the high-voltage cable adopts a steel core or carbon fiber composite core wire, a plurality of layers of aluminum stranded wires are wrapped outside, the outer layers of aluminum stranded wires are required to be subjected to wire stripping operation before the wire is crimped, the aluminum stranded wires are cut off, the steel core or carbon fiber composite core wire is exposed for connection, the cable connection quality is a key link for ensuring the smoothness of the cable line, and due to complex manufacturing process, constructors are not easy to master, construction defects frequently occur, so that a novel cable cutting device is needed to change the existing situation.
Disclosure of Invention
In order to solve the above problems, the present invention provides a full-diameter high-voltage cable cutting device.
The specific contents are as follows: full line footpath high-voltage cable cutting equipment, this equipment is including supporting barrel, fastening claw, clamping nut and cutting assembly, characterized by:
The supporting cylinder body is cylindrical, wire entering gaps penetrating through two ends are formed in the direction of a bus of the supporting cylinder body, at least three containing holes which are uniformly distributed along the circumferential direction of the supporting cylinder body are formed in the supporting cylinder body, the containing holes are long-strip-shaped and are formed in the direction of the bus of the supporting cylinder body, external threads are formed in the outer circumferential surface of the supporting cylinder body, the clamping nuts are correspondingly screwed outside the supporting cylinder body through the external threads, fastening claws which are correspondingly matched with the clamping nuts are arranged in each containing hole, the outer end of each fastening claw is hinged to a hinge lug at a corresponding position, each hinge lug is fixed on the end face of the outer end of the supporting cylinder body, an inwards protruding claw head is arranged at the belly of the free end of each fastening claw, a driving head which protrudes outwards is arranged at the back of the middle section of each fastening claw, a driving surface which is smoothly connected with the back of the fastening claw is circular arc-shaped and is tangential to the lower edge corresponding to the clamping nuts is arranged on the driving head;
The cutting assembly comprises an electric saw cutting machine, a driving motor and a driving ring, wherein a step surface is arranged at the inner end of a supporting cylinder body, the driving ring is circular and is matched with the step surface, the driving ring is sleeved on the step surface of the supporting cylinder body and is provided with a break opening matched with a wire entering notch, a fixed baffle matched with the outline of the driving ring is fixed on the inner end surface of the supporting cylinder body, the fixed baffle limits the driving ring at the outer side, the driving ring freely rotates on the step surface, continuous gear teeth are arranged on the outer circumferential surface of the driving ring, the gear teeth and the driving gear are meshed to form gear transmission, the driving gear is coaxially fixed on the driving motor, the driving motor is fixed on the outer circumferential surface of the supporting cylinder body through a bracket, the driving gear at least comprises three mounting plates which are uniformly distributed in the circumferential direction, a long-shaped cutter through hole is formed in the mounting plate and is hinged to the edge of the mounting plate along the axial direction of the supporting cylinder body, the other end of the electric saw cutting machine is clamped on an arc-shaped adjusting plate through a limiting saw, the limiting saw is fixed on the adjusting plate, and the axial center line of the cutting blade is parallel to the axial center line of the cutting blade of the mounting plate and the cutting blade is parallel to the axial center line of the cutting blade.
Preferably, the arc adjusting plate is provided with an arc adjusting hole, the limiting shaft penetrates through the arc adjusting hole and is fixed on the electric saw cutting machine, the adjusting bolt penetrates through the arc adjusting hole and is clamped on the arc adjusting plate through a nut, the free end of the electric saw cutting machine is fixed with a tensioning spring, and the free end of the tensioning spring is fixed on the corresponding edge of the mounting plate.
Preferably, at least three clamping bolts are uniformly distributed at the outer end of the supporting cylinder body along the circumferential direction, the clamping bolts are connected to the supporting cylinder body through threads, and each clamping bolt penetrates through the supporting cylinder body along the radial direction of the supporting cylinder body.
Preferably, the clamping nut comprises two symmetrical nut monomers, one ends of the two nut monomers are connected through a hinge, and the other ends of the two nut monomers are fixedly connected through fixing bolts.
Preferably, the clamping nut is provided with jacks penetrating radially, and the jacks at least comprise three jacks and are uniformly distributed along the circumferential direction.
Preferably, the outer circumferential surface of the supporting cylinder body is fixedly provided with a mounting box, and the top of the mounting box is hinged with a handle.
The beneficial technical effects of the invention are as follows:
The invention relates to full-diameter high-voltage cable cutting equipment, a wire entering notch is arranged on a supporting cylinder body, the wire enters the supporting cylinder body from the wire entering notch, the wire does not need to be inserted from the end of the wire, any section of the wire can be cut and stripped, the use limitation is small, the adaptability is good, then a clamping nut rotates to drive a fastening claw to shrink inwards to clamp the wire, the wire is clamped firmly and automatically centered, the wire to be cut section and the supporting cylinder body are coaxial, meanwhile, a clamping bolt is arranged at the outer end of the supporting cylinder body and can clamp the wire for the second time, the stability and the accuracy of cutting are ensured, finally, the position of an adjusting bolt on an arc-shaped adjusting hole is set, namely the cutting depth of a saw cutting machine is set, a driving motor rotates through gear transmission, and then the saw cutting machine is driven to cut the wire in a ring shape with corresponding depth, meanwhile, the saw cutting machine automatically and continuously increases the cutting depth under the action of a tensioning spring, so that the nondestructive automatic cutting of the wire with a core is realized, the saw cutting machine can be used for ground and high-altitude operation, and the construction efficiency can be greatly improved.
Drawings
FIG. 1 is a schematic perspective view of a full-diameter high-voltage cable cutting device;
FIG. 2 is a schematic diagram of a three-dimensional structure of a full-diameter high-voltage cable cutting device;
FIG. 3 is a three-dimensional schematic view of a full-diameter high-voltage cable cutting device;
FIG. 4 is a schematic perspective view of the saw cutting machine and mounting plate of FIG. 1 with the saw cutting machine removed;
FIG. 5 is a schematic perspective view of a power saw cutter mounted on a drive ring;
FIG. 6 is a cross-sectional view of the drive ring and the fastening claws mounted to the support cylinder;
FIG. 7 is a schematic perspective view of a support cylinder;
FIG. 8 is a schematic perspective view of a clamping nut;
FIG. 9 is a schematic perspective view of a drive ring;
FIG. 10 is a schematic perspective view of the fastening claw;
In the figure: 11. support cylinder 32, fastening jaw 21, clamping nut 16, receiving hole 12, external thread 13, hinge lug 15, wire entry notch 33, jaw head 31, drive head 34, drive face 47, electric saw cutter 43, drive motor 41, drive ring 25, nut unit 17, step face 412, break opening 42, fixed stop 411, gear teeth on drive ring 44, drive gear 45, bracket 46, mounting plate 461, cutter through hole 472, adjusting bolt 473, tensioning spring 474, limiting shaft 462, arc adjusting plate 471, saw tooth cutting blade 463, arc adjusting hole 14, clamping bolt 24, nut unit 22, fixing bolt 26, jack 23, hinge 51, mounting box 52, handle.
Detailed Description
1-10, A full-wire high-voltage cable cutting apparatus comprising a support cylinder, a fastening jaw, a clamping nut, and a cutting assembly;
The supporting cylinder body is cylindrical, wire entering gaps penetrating through two ends are formed in the direction of a bus of the supporting cylinder body, at least three containing holes which are uniformly distributed along the circumferential direction of the supporting cylinder body are formed in the supporting cylinder body, the containing holes are long-strip-shaped and are formed in the direction of the bus of the supporting cylinder body, external threads are formed in the outer circumferential surface of the supporting cylinder body, the clamping nuts are correspondingly screwed outside the supporting cylinder body through the external threads, fastening claws which are correspondingly matched with the clamping nuts are arranged in each containing hole, the outer end of each fastening claw is hinged to a hinge lug at a corresponding position, each hinge lug is fixed on the end face of the outer end of the supporting cylinder body, an inwards protruding claw head is arranged at the belly of the free end of each fastening claw, a driving head which protrudes outwards is arranged at the back of the middle section of each fastening claw, a driving surface which is smoothly connected with the back of the fastening claw is circular arc-shaped and is tangential to the lower edge corresponding to the clamping nuts is arranged on the driving head;
The cutting assembly comprises an electric saw cutting machine, a driving motor and a driving ring, wherein a step surface is arranged at the inner end of a supporting cylinder body, the driving ring is circular and is matched with the step surface, the driving ring is sleeved on the step surface of the supporting cylinder body and is provided with a break opening matched with a wire entering notch, a fixed baffle matched with the outline of the driving ring is fixed on the inner end surface of the supporting cylinder body, the fixed baffle limits the driving ring at the outer side, the driving ring freely rotates on the step surface, continuous gear teeth are arranged on the outer circumferential surface of the driving ring, the gear teeth and the driving gear are meshed to form gear transmission, the driving gear is coaxially fixed on the driving motor, the driving motor is fixed on the outer circumferential surface of the supporting cylinder body through a bracket, the driving gear at least comprises three mounting plates which are uniformly distributed in the circumferential direction, a long-shaped cutter through hole is formed in the mounting plate and is hinged to the edge of the mounting plate along the axial direction of the supporting cylinder body, the other end of the electric saw cutting machine is clamped on an arc-shaped adjusting plate through a limiting saw, the limiting saw is fixed on the adjusting plate, and the axial center line of the cutting blade is parallel to the axial center line of the cutting blade of the mounting plate and the cutting blade is parallel to the axial center line of the cutting blade.
The utility model provides a saw cutting machine, including arc regulating plate, limiting shaft and adjusting bolt, the arc regulating plate on be equipped with the arc regulating hole on, limiting shaft passes the arc regulating hole and nut presss from both sides tightly on the arc regulating plate, be fixed with tensioning spring on the free end of saw cutting machine, tensioning spring's free end is fixed on the corresponding border of mounting panel, through setting up the position of adjusting bolt on the arc regulating hole, set for the cutting depth of saw cutting machine promptly, when cutting the wire, saw cutting machine increases the cutting depth under tensioning spring's effect, until limiting shaft and adjusting bolt contact, reached predetermined cutting depth promptly.
The outer end of support barrel along circumference direction equipartition have at least three clamping bolt, clamping bolt passes through threaded connection on supporting the barrel, every clamping bolt runs through along the radial of supporting the barrel and sets up, carries out the secondary through clamping bolt and presss from both sides tightly to the wire that treats the cutting, ensures the stability and the accuracy of cutting process.
The clamping nut comprises two symmetrical nut monomers, one ends of the two nut monomers are connected through a hinge, the other ends of the two nut monomers are fixedly connected through a fixing bolt, when a wire enters the supporting cylinder body through a wire entering gap, the two nut monomers are opened around the hinge only by screwing and loosening the fixing bolt, and after the wire is installed, the two nut monomers are buckled on the supporting cylinder body to form the clamping nut, so that the clamping nut is flexible and convenient to use.
The clamping nut on be equipped with along its radial jack that runs through, this jack includes three and along circumferencial direction equipartition at least, when needs rotate clamping nut, can insert in the jack through screwdriver and similar instrument and borrow the power, can easily rotate clamping nut, guarantee the steadiness that the fastening claw pressed from both sides tightly the wire.
The outer circumferential surface of the supporting cylinder body is fixedly provided with a mounting box, a battery can be mounted in the mounting box for supplying power to the driving motor, the top of the mounting box is hinged with a lifting handle, and the lifting handle is convenient to carry and move the whole equipment.
The working principle and the process of the invention are as follows:
The wire entering notch is formed in the supporting cylinder body, the wire enters the supporting cylinder body from the wire entering notch, the wire does not need to be inserted from the end of the wire, cutting and wire stripping can be conducted on any section of the wire, the use limitation is small, the adaptability is good, then the clamping nut is rotated, all the fastening claws are simultaneously driven to retract towards the center to clamp the wire through the claw heads, the wire is firmly clamped and automatically centered, the coaxial center of the wire section to be cut and the supporting cylinder body is guaranteed, meanwhile, the clamping bolt is arranged at the outer end of the supporting cylinder body, the screwing clamping bolt stretches into the center to conduct secondary clamping on the wire, cutting stability and accuracy are guaranteed, finally, the position of the adjusting bolt on the arc-shaped adjusting hole is set, namely the cutting depth of the electric saw cutting machine is set, the driving motor drives the driving ring to rotate, and then the electric saw cutting machine conducts annular cutting of corresponding depth on the wire, and when the wire is cut, the electric saw cutting machine continuously and automatically increases the cutting depth under the action of the tensioning spring until the limiting shaft is in contact with the adjusting bolt, namely the preset cutting depth is reached, nondestructive automatic cutting of the wire with a core is achieved, the wire is used when the wire is used in an overground and high-level operation, and construction efficiency is greatly improved.
Claims (4)
1. Full line footpath high-voltage cable cutting equipment, this equipment is including supporting barrel, fastening claw, clamping nut and cutting assembly, characterized by:
The supporting cylinder body is cylindrical, wire entering gaps penetrating through two ends are formed in the direction of a bus of the supporting cylinder body, at least three containing holes which are uniformly distributed along the circumferential direction of the supporting cylinder body are formed in the supporting cylinder body, the containing holes are long-strip-shaped and are formed in the direction of the bus of the supporting cylinder body, external threads are formed in the outer circumferential surface of the supporting cylinder body, the clamping nuts are correspondingly screwed outside the supporting cylinder body through the external threads, fastening claws which are correspondingly matched with the clamping nuts are arranged in each containing hole, the outer end of each fastening claw is hinged to a hinge lug at a corresponding position, each hinge lug is fixed on the end face of the outer end of the supporting cylinder body, an inwards protruding claw head is arranged at the belly of the free end of each fastening claw, a driving head which protrudes outwards is arranged at the back of the middle section of each fastening claw, a driving surface which is smoothly connected with the back of the fastening claw is circular arc-shaped and is tangential to the lower edge corresponding to the clamping nuts is arranged on the driving head;
The cutting assembly comprises an electric saw cutting machine, a driving motor and a driving ring, wherein a step surface is arranged at the inner end of a supporting cylinder, the driving ring is circular and is matched with the step surface, the driving ring is sleeved on the step surface of the supporting cylinder and is provided with a break-off opening matched with a wire entering notch, a fixed baffle matched with the wire is fixed on the inner end surface of the supporting cylinder, the fixed baffle limits the driving ring at the outer side, the driving ring freely rotates on the step surface, continuous gear teeth are arranged on the outer circumferential surface of the driving ring, the gear teeth are meshed with the driving gear to form gear transmission, the driving gear is coaxially fixed on the driving motor, the driving motor is fixed on the outer circumferential surface of the supporting cylinder through a bracket, the driving gear at least comprises three mounting plates which are uniformly distributed in the circumferential direction, a long-strip-shaped cutter through hole is formed in the mounting plate, one end of the electric saw is hinged on the edge of the mounting plate, the other end of the electric saw cutting machine is clamped on an arc-shaped adjusting plate through a limiting saw, the adjusting plate is fixed on the outer circumferential surface of the driving motor, and the cutting through the arc-shaped saw adjusting plate is parallel to the axial center line of the cutting blade of the mounting plate;
The arc-shaped adjusting plate is provided with an arc-shaped adjusting hole, the limiting shaft penetrates through the arc-shaped adjusting hole and is fixed on the electric saw cutting machine, the adjusting bolt penetrates through the arc-shaped adjusting hole and is clamped on the arc-shaped adjusting plate through a nut, the free end of the electric saw cutting machine is fixed with a tensioning spring, and the free end of the tensioning spring is fixed on the corresponding edge of the mounting plate;
The outer end of the supporting cylinder body is uniformly provided with at least three clamping bolts along the circumferential direction, the clamping bolts are connected to the supporting cylinder body through threads, and each clamping bolt penetrates through the supporting cylinder body along the radial direction of the supporting cylinder body.
2. The full-diameter high-voltage cable cutting equipment according to claim 1, wherein: the clamping nut comprises two symmetrical nut monomers, one ends of the two nut monomers are connected through a hinge, and the other ends of the two nut monomers are fixedly connected through fixing bolts.
3. The full-diameter high-voltage cable cutting equipment according to claim 1, wherein: the clamping nut is provided with jacks which penetrate through along the radial direction of the clamping nut, and the jacks at least comprise three jacks and are uniformly distributed along the circumferential direction.
4. The full-diameter high-voltage cable cutting equipment according to claim 1, wherein: the outer circumferential surface of the supporting cylinder body is fixedly provided with a mounting box, and the top of the mounting box is hinged with a handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911209045.9A CN110814225B (en) | 2019-11-30 | 2019-11-30 | Full-line-diameter high-voltage cable cutting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911209045.9A CN110814225B (en) | 2019-11-30 | 2019-11-30 | Full-line-diameter high-voltage cable cutting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110814225A CN110814225A (en) | 2020-02-21 |
| CN110814225B true CN110814225B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911209045.9A Active CN110814225B (en) | 2019-11-30 | 2019-11-30 | Full-line-diameter high-voltage cable cutting equipment |
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| Country | Link |
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| CN (1) | CN110814225B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115528610A (en) * | 2022-08-31 | 2022-12-27 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | Wire stripping device for electric power engineering construction |
| CN117096696B (en) * | 2023-10-16 | 2024-01-05 | 国网浙江省电力有限公司宁波供电公司 | Wire crimping device and method for electric power construction |
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| JPH07178490A (en) * | 1993-12-22 | 1995-07-18 | Asahi Seiki Kogyo Kk | Ring machine |
| CN107465155A (en) * | 2017-09-04 | 2017-12-12 | 南京汉启能源技术有限公司 | The accurate saw blade cutting machine mechanism of the three automatic pre-processing devices of core crosslinked cable joint |
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| CN211027890U (en) * | 2019-11-30 | 2020-07-17 | 华北水利水电大学 | Full-wire-diameter high-voltage cable cutting equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101646803B1 (en) * | 2008-11-03 | 2016-08-12 | 쉴로이니게르 홀딩 아게 | Cut and strip machine for producing cable-sections |
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2019
- 2019-11-30 CN CN201911209045.9A patent/CN110814225B/en active Active
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| JPH07178490A (en) * | 1993-12-22 | 1995-07-18 | Asahi Seiki Kogyo Kk | Ring machine |
| CN107465155A (en) * | 2017-09-04 | 2017-12-12 | 南京汉启能源技术有限公司 | The accurate saw blade cutting machine mechanism of the three automatic pre-processing devices of core crosslinked cable joint |
| CN107470513A (en) * | 2017-09-22 | 2017-12-15 | 天津德芃科技集团有限公司 | A kind of electric wire cutting equipment of low abrasion |
| CN110026491A (en) * | 2019-05-28 | 2019-07-19 | 华北水利水电大学 | Refrigeration copper tube non-contraction tube expanding built-up jig |
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| Title |
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| CN110814225A (en) | 2020-02-21 |
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