CN113581024A - Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper - Google Patents

Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper Download PDF

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Publication number
CN113581024A
CN113581024A CN202111072228.8A CN202111072228A CN113581024A CN 113581024 A CN113581024 A CN 113581024A CN 202111072228 A CN202111072228 A CN 202111072228A CN 113581024 A CN113581024 A CN 113581024A
Authority
CN
China
Prior art keywords
dropper
clamp
wire clamp
contact line
carrier cable
Prior art date
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Pending
Application number
CN202111072228.8A
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Chinese (zh)
Inventor
任兴堂
安金旺
李亚峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
An Jinwang
Li Yafeng
Ren Xingtang
China Railway Construction Electrification Bureau Group Rail Transit Equipment Co Ltd
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to CN202111072228.8A priority Critical patent/CN113581024A/en
Publication of CN113581024A publication Critical patent/CN113581024A/en
Priority to PCT/CN2022/114238 priority patent/WO2023040604A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B60M1/225—Arrangements for fixing trolley wires to supporting-lines which are under tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
    • B60M1/22—Separate lines from which power lines are suspended, e.g. catenary lines, supporting-lines under tension

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

The invention discloses a contact wire dropper wire clamp, a carrier cable dropper wire clamp and a hanging ring type bolt-free integral dropper, and relates to an electrified railway contact net erecting device. The invention relates to a suspension ring type bolt-free integral suspension string, which comprises a suspension string line, a contact line suspension string clamp and a carrier cable suspension string clamp, wherein the contact line suspension string clamp and the carrier cable suspension string clamp are connected to two ends of the suspension string line. The hanging ring type bolt-free integral hanger has high wear resistance and long bending fatigue life which can reach more than 700 ten thousand times.

Description

Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper
Technical Field
The invention relates to an electrified railway contact net erecting device, in particular to a lifting ring type bolt-free integral dropper.
Background
By the end of 2020, the high-speed rail reaches 3.79 ten thousand meters in China, the using amount of the whole dropper device is at least over 700 thousand, and the dropper device is one of the largest using amount of parts of the contact network. Wherein 90 percent of the devices are stamping type integral dropper devices.
The operation practice shows that hundreds of stamping type integral dropper devices are broken every year, and the driving safety is greatly influenced. In order to ensure the driving safety, the operation unit needs to invest manpower and material resources to check or replace regularly. Now, the individual high-speed rail sections have been overhauled or replaced locally, which is caused by the following problems of the punching type integral dropper device:
(1) the stamping type integral dropper device is connected with the contact wire and the carrier cable by bolts. Because the high-speed rail contact net is an elastic system with large vibration, the bolt is easy to loosen in the vibration, and even the whole dropper device can automatically fall off if not found in time, thereby influencing the driving safety.
(2) The poor control of the pressure welding force can cause the pressure damage of the dropper, and the wire breakage is easy to occur at the outlet of the pressure welding pipe during the operation
(3) The integral hanger adopts a ring-ring connection mode (the heart-shaped guard ring is connected with the hanging ring), the sizes of the heart-shaped guard ring and the hanging ring are limited (if the shape of the heart-shaped guard ring is too large, the heart-shaped guard ring can be unrestrained in the hanging ring, the hanging ring line wound on the heart-shaped guard ring is easy to impact the top of a wire clamp in vibration, the hanging wire line is abraded, and wire breakage or strand breakage is easy to occur on the contrary), the hanging ring is made of a copper alloy plate with the thickness of 1.5mm at present, the plate is thin and not abrasion-resistant, the hanging ring is sometimes too thin or even completely abraded due to the abrasion of the hanging ring, the hanging ring is broken and can not continue, and the service life is greatly limited.
In order to solve the problems of the stamping type integral dropper device, the invention provides a novel bolt-free integral dropper device with application number 202021613302.3, and compared with the stamping integral dropper device, the bolt-free integral dropper device has the following advantages:
(1) bolt fastening is not needed, the problem of looseness caused by bolt connection is avoided, and the reliability of the contact network is improved.
(2) The clamp body has high strength which is 2.4 times that of the existing stamping clamp, and the problem that the stamping clamp is easy to generate plastic deformation and cause bolt looseness is solved.
(3) The fatigue life of the device is basically consistent with that of a stamping type integral dropper device.
However, the novel bolt-free integral dropper device is not enough in the using process because the wire clamp and the dropper wire adopt a ball-and-socket connection mode, the swing angle of the crimping pipe in the connection mode is smaller than 60 degrees in tests, the dropper wire at the front end of the crimping pipe is subjected to repeated bending force due to limited swing, the dropper wire is easily damaged, and the dropper wire is broken due to the fact that the bending life of the dropper wire is limited when the fatigue times reach 350 ten thousand times.
In conclusion, the stamping type integral dropper device is not wear-resistant, and the swing amplitude of the ball socket of the bolt-free integral dropper device is limited, so that the bending life of the dropper is shortened. Therefore, a contact wire clamp, a carrier cable clamp and an integral dropper with high wear resistance and long service life are urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a contact wire dropper wire clamp, a carrier cable dropper wire clamp and a dropper-type bolt-free integral dropper with high wear resistance and long service life.
The invention relates to a contact line dropper clamp, which consists of a contact line left half dropper clamp and a contact line right half dropper clamp which are detachable, wherein the contact line left half dropper clamp and the contact line right half dropper clamp have the same structure and are inserted together by a positioning and clamping device and a locking device by taking a vertical shaft as a symmetry axis, the positioning and clamping device and the locking device are positioned at the middle layer of a contact line left half dropper clamp body and a contact line right half dropper clamp body, the positioning and clamping device consists of a first positioning pin which is connected with the contact line left half dropper clamp body, extends out transversely rightwards, has a right trapezoid horizontal section, is matched with the first positioning pin, is positioned at the middle layer of the contact line right half dropper clamp body, is composed of a first positioning clamping pair, is composed of a second positioning pin which is connected with the contact line right half dropper clamp body, extends out transversely leftwards, has a right trapezoid horizontal section, and is matched with the second positioning clamping pair, is composed of a second positioning groove which is positioned on the contact line left half dropper clamp body, the two side straight faces of the first positioning pin and the second positioning pin are parallel and have a proper gap, the anti-loosening device consists of a first anti-loosening pair which is arranged on the right side of the first positioning pin and is positioned on the contact line left half string clamp body, a first upper straight rack plate which is matched with the first upper straight rack plate and is arranged on the right side of the first positioning groove and is positioned below the contact line right half string clamp body, a second anti-loosening pair which is arranged on the left side of the second positioning pin and is positioned on the contact line right half string clamp body, a second upper straight rack plate which is matched with the second upper straight rack plate and is arranged on the left side of the second positioning pin and is positioned below the contact line left half string clamp body, and a second lower straight rack plate which is matched with the second upper straight rack plate and is arranged below the contact line left half string clamp body, the plane where the tooth tops of the first upper straight rack plate and the second upper straight rack plate are positioned is flush with the bottom faces of the first positioning pin and the second positioning pin, the plane where the tooth roots of the first lower straight rack plate and the second lower straight rack plate are located is flush with the bottom surfaces of the second positioning groove and the first positioning groove, the lower layers of the bodies of the contact line left half string clamp and the contact line right half string clamp and the transverse axis of the body of the contact line string clamp are respectively provided with a string clamping claw, the two string clamping claws are respectively matched with a string clamping groove of a clamped contact line, a first threaded through hole for disassembly is formed in the body of the contact line left half string clamp positioned at the left end of the second positioning groove, the position of the first threaded through hole is aligned with the left end surface of the second positioning pin, a second threaded through hole for disassembly is formed in the body of the contact line right half string clamp positioned at the right end of the first positioning groove, the position of the second threaded through hole is aligned with the right end surface of the first positioning pin, the external shape of the middle lower part of the body of the string clamp is a cuboid, the front side wall of the contact line left half string clamp body is formed by splicing the side wall of a second positioning groove connected with the contact line left half string clamp body with the side wall of a contact line right half string clamp body matched with the side wall of the contact line left half string clamp body, the rear side wall of the contact line right half string clamp body is formed by splicing the side wall of a first positioning groove connected with the contact line right half string clamp body with the side wall of the contact line left half string clamp body matched with the contact line left half string clamp body, the insertion ends of the side walls of the first positioning groove and the second positioning groove are semicircular, the left end face of the middle part of the contact line left half string clamp body and the right end face of the middle part of the contact line right half string clamp body are respectively provided with a first threading round hole and a second threading round hole, the first threading round hole and the second threading round hole are respectively parallel to the first threading through hole and the second threading round hole, and the first threading round hole and the second threading round hole are communicated and are not coaxial when the contact line left half string clamp and the contact line string clamp are clamped, the distance between the axis of the first threading round hole and the axis of the second threading round hole is S, S is more than 0, the first threading round hole and the second threading round hole are through holes, the axis of the first threading round hole and the axis of the second threading round hole use the transverse axis of the contact line dropper wire clamp body as a symmetrical axis, the front and back end surfaces of the upper layer of the main body of the contact line left half hanging string wire clamp and the contact line right half hanging string wire clamp are respectively provided with two half inverted T-shaped holes by taking the transverse axis of the main body of the contact line hanging string wire clamp as a symmetrical axis, the four half inverted T-shaped holes form two inverted T-shaped holes, the contact wire dropper wire clamp also comprises a lower hanging ring which is formed by forging copper-nickel alloy, the lower lifting ring comprises a lower ring body and inverted T-shaped connecting columns integrally formed at two end parts of the lower ring body, and the inverted T-shaped connecting columns are matched with the inverted T-shaped holes in shape and can be clamped in the inverted T-shaped holes.
The invention relates to a contact wire dropper clamp, wherein the tooth height of teeth of a first upper straight rack plate, a first lower straight rack plate, a second upper straight rack plate and a second lower straight rack plate is 0.5 mm.
The invention relates to a contact wire dropper clamp, wherein the diameters of a first threaded through hole and a second threaded through hole are 6 mm.
The invention relates to a contact line dropper clamp, wherein an angle formed by a side straight surface and a side inclined surface of a first positioning pin and a second positioning pin is 5 degrees, and an angle formed by the side straight surface and the side inclined surface of the first positioning pin and the second positioning pin is 5 degrees.
The difference between the contact line dropper clamp and the prior art is that the front and back end surfaces of the upper layer of the contact line left half dropper clamp body and the contact line right half dropper clamp body are respectively provided with two half inverted T-shaped holes by taking the transverse axis of the contact line dropper clamp body as a symmetrical axis, each two half inverted T-shaped holes form a complete inverted T-shaped hole, the contact line dropper clamp also comprises a lower hanging ring, the lower hanging ring is formed by die forging nickel-containing copper alloy, nickel is dissolved into a copper matrix before die forging, the wear resistance is improved, the lower hanging ring comprises a lower ring body and inverted T-shaped connecting posts integrally formed at the two end parts of the lower ring body, the shape of the inverted T-shaped connecting posts is matched with the shape of the inverted T-shaped holes and can be clamped in the inverted T-shaped holes, when in use, the lower hanging ring is sleeved with the lower heart-shaped protective ring of the dropper clamp, the ring and the ring are connected to connect the dropper clamp and the dropper, the lower hanging ring is in line contact, the lower hanging ring is designed to be circular, the lower heart-shaped protective ring can be free from being constrained in vibration, repeated bending force on a string hanging line at a pressing connection pipe at the upper end of the lower heart-shaped protective ring can be eliminated, the parallel distance between the two inverted T-shaped connecting columns ensures that the lower heart-shaped protective ring cannot impact a wire clamp in any state, the problem of damage of the string hanging line is solved, and the service life is prolonged.
The invention relates to a carrier cable dropper wire clamp which comprises a left carrier cable dropper wire clamp and a right carrier cable dropper wire clamp which are detachable, wherein the left carrier cable dropper wire clamp and the right carrier cable dropper wire clamp have the same structure and are inserted together by a clamping and positioning device and a locking device by taking a vertical shaft as a symmetry axis, the clamping and positioning device and the locking device are positioned at the middle layer of the left carrier cable dropper wire clamp body and the right carrier cable dropper wire clamp body, the clamping and positioning device comprises a first clamping and positioning pair formed by a first positioning pin which is connected with the left carrier cable dropper wire clamp body and transversely extends rightwards and is of a right trapezoid, a second positioning pin which is matched with the first positioning pin and is positioned on the right carrier cable dropper wire clamp body, and a second clamping and positioning pair formed by a second positioning pin which is connected with the right carrier cable dropper wire clamp body and transversely extends leftwards and is of a right trapezoid and a second positioning slot which is matched with the second positioning pin and is positioned on the left carrier cable dropper wire clamp body, the two side straight faces of the first positioning pin and the second positioning pin are parallel and have a proper gap, the anti-loosening device comprises a first anti-loosening pair consisting of a first upper straight rack plate arranged on the right of the first positioning pin, a first lower straight rack plate arranged on the left half messenger wire clamp body of the messenger cable, a first anti-loosening pair matched with the first lower straight rack plate, a second anti-loosening pair consisting of a first upper straight rack plate arranged on the right half messenger wire clamp body of the messenger cable, a second lower straight rack plate arranged on the left of the second positioning pin, a second upper straight rack plate matched with the second lower straight rack plate and arranged on the left of the second positioning pin and arranged on the left half messenger wire clamp body of the messenger cable, the planes of tooth crests of the first and second lower straight rack plates are flush with the top faces of the first and second positioning pins, and the planes of tooth roots of the first and second upper straight rack plates are flush with the top faces of the second positioning pin, and the plane of tooth roots of the first and second positioning pin, The top surfaces of the first half carrier cable clamp and the second half carrier cable clamp are flush, half cylinders are respectively arranged on the upper layer of the main body of the first half carrier cable clamp and the second half carrier cable clamp by taking the transverse axis of the main body of the first carrier cable clamp as a symmetry axis, an inner hole of the cylinder consisting of the two half cylinders is matched with the carrier cable, a first threaded through hole for disassembly is formed on the main body of the first half carrier cable clamp positioned at the left end of the second positioning groove, the first threaded through hole is aligned to the left end surface of the second positioning pin, a second threaded through hole for disassembly is formed on the main body of the second carrier cable clamp positioned at the right end of the first positioning groove, the second threaded through hole is aligned to the right end surface of the first positioning pin, the middle upper part of the main body of the carrier cable clamp is cuboid in external shape, and the rear side wall of the main body of the carrier cable clamp is formed by splicing the side wall of the second positioning groove connected with the main body of the left half carrier cable clamp and the side wall of the second carrier cable clamp matched with the main body of the right half carrier cable clamp, the front side wall of the clamp is formed by splicing the side wall of a positioning groove I connected with a carrier cable right half-string clamp body and the side wall of a carrier cable left half-string clamp body matched with the positioning groove I, the insertion ends of the side walls of the positioning groove I and the positioning groove II are semicircular, a threading round hole I and a threading round hole II are respectively arranged on the left end surface of the middle part of the carrier cable left half-string clamp body and the right end surface of the middle part of the carrier cable right half-string clamp body, the threading round holes I and II are respectively parallel to a thread through hole I and II, the threading round holes I and II are communicated with the threading round holes II and are not coaxial under the clamping state of the carrier cable left half-string clamp and the carrier cable right half-string clamp, the distance between the axis of the threading round hole I and the axis of the threading round hole II is S ', S' is larger than 0, the threading round hole I and the threading round hole II are through holes, and the axis of the threading round hole I and the threading round hole II are symmetrical shafts by taking the transverse axis of the carrier cable suspension string clamp body, the utility model discloses a bearing cable hanger clamp, including bearing cable hanger clamp body, the cross axis of bearing cable hanger clamp body is used as the symmetry axis and respectively is equipped with two half T holes, and T shape hole is constituteed in four half T holes, bearing cable hanger clamp still includes rings, it adopts nickel-containing copper alloy to form through the die forging to go up rings, and nickel dissolves in the copper base member before the die forging, go up rings and include ring body and integrative T shape spliced pole that constitutes in last ring body both ends, and the shape in T shape spliced pole cooperatees with the shape in T shape hole, but the joint is downthehole in T shape.
The carrier cable dropper wire clamp comprises a lower straight rack plate I, an upper straight rack plate I, a lower straight rack plate II and an upper straight rack plate II, wherein the tooth height of teeth of the lower straight rack plate I, the upper straight rack plate I, the lower straight rack plate II and the upper straight rack plate II is 0.5mm, and the diameter of a thread through hole I and the diameter of the thread through hole II are 6 mm.
The carrier cable dropper wire clamp comprises a semi-cylinder body, wherein a plurality of corresponding circumferential anti-skidding grooves are formed in the inner wall of the semi-cylinder body at intervals.
The carrier cable dropper wire clamp of the invention is characterized in that the angle formed by the side straight surfaces and the side inclined surfaces of the first positioning pin and the second positioning pin is 5 degrees, and the angle formed by the side straight surfaces and the side inclined surfaces of the first positioning slot and the second positioning slot is 5 degrees.
The difference between the carrier cable dropper clamp and the prior art is that the lower layer of the body of the carrier cable left half dropper clamp and the carrier cable right half dropper clamp is provided with two half T-shaped holes by taking the transverse axis of the body of the carrier cable dropper clamp as a symmetrical axis, the four half T-shaped holes form two T-shaped holes, the carrier cable dropper clamp further comprises an upper hanging ring, the upper hanging ring is formed by die forging nickel-containing copper alloy, nickel is dissolved into the copper matrix before die forging, the wear resistance is high, the upper hanging ring comprises an upper ring body and T-shaped connecting columns integrally formed at two ends of the upper ring body, the shape of the T-shaped connecting columns is matched with the shape of the T-shaped holes and can be clamped in the T-shaped holes, when in use, the upper hanging ring is sleeved with an upper heart-shaped retaining ring of a dropper, the carrier cable dropper clamp and the dropper are connected by adopting the ring-ring connection mode, the upper hanging ring is in line contact, the upper hanging ring is designed to be circular, so that the upper heart-shaped retaining ring is not restrained in vibration, therefore, repeated bending force on the dropper wire at the upper pressure connection pipe at the lower end of the upper heart-shaped retaining ring can be eliminated, the parallel distance between the two T-shaped connecting columns ensures that the wire clamp cannot be impacted by the upper heart-shaped retaining ring in any state, the problem of damage of the dropper wire is solved, and the service life is prolonged.
The invention relates to a hanging ring type bolt-free integral hanging string, which comprises a contact line hanging string wire clamp, a carrier cable hanging string wire clamp and a hanging string wire, wherein: the dropper comprises a wire body, an upper pressure connection pipe, a lower pressure connection pipe, an upper heart-shaped retaining ring, a lower heart-shaped retaining ring, the upper heart-shaped retaining ring, the lower heart-shaped retaining ring is made of 316L stainless steel, the upper heart-shaped retaining ring is sleeved on the upper hanging ring, the lower heart-shaped retaining ring is sleeved on the lower hanging ring, the upper end of the wire body bypasses the upper heart-shaped retaining ring and is inserted into a first threading round hole and a second threading round hole and is clamped tightly, the lower end of the wire body bypasses the lower heart-shaped retaining ring and is inserted into the first threading round hole and the second threading round hole and is clamped tightly, the upper pressure connection pipe is attached to the end of the upper heart-shaped retaining ring and wraps the two folded wire bodies, and the lower pressure connection pipe is attached to the end of the lower heart-shaped retaining ring and wraps the two folded wire bodies.
The invention relates to a hanging ring type bolt-free integral dropper, wherein the curvatures of curved surfaces of an upper hanging ring and an upper heart-shaped retaining ring which are contacted with each other are the same, and the curvatures of curved surfaces of a lower hanging ring and a lower heart-shaped retaining ring which are contacted with each other are the same.
The invention relates to a hanging ring type bolt-free integral dropper, wherein the tensile strength of a contact wire dropper wire clamp and a carrier cable dropper wire clamp is more than or equal to 17.5kN, and the fatigue frequency of the integral dropper is more than 700 ten thousand times.
The invention relates to a suspension ring type bolt-free integral suspension string which is different from the prior art in that a contact wire suspension string clamp comprises a lower suspension ring, a carrier cable suspension string clamp comprises an upper suspension ring, the upper suspension ring and the lower suspension ring are made of high-strength copper alloy containing nickel element by die forging and solution treatment process, the surface hardness, strength and wear resistance of the formed upper suspension ring and the lower suspension ring are completely matched with those of an upper heart-shaped protective ring and a lower heart-shaped protective ring, the wear resistance is high, when in use, the upper suspension ring and the lower suspension ring are respectively sleeved with the upper heart-shaped protective ring and the lower heart-shaped protective ring of a suspension string, the suspension string is connected with the carrier cable suspension string clamp and the contact wire suspension string clamp by adopting the way of connecting the rings and the rings, the upper suspension ring and the lower suspension ring can meet the condition that the upper heart-shaped protective ring and the lower heart-shaped protective ring are not restrained in vibration, so that the repeated bending force borne by the suspension string at the upper pressure connection pipe at the lower end of the upper heart-shaped protective ring and the lower pressure connection pipe at the upper end of the lower heart-shaped protective ring can be eliminated, the parallel distance between the two T-shaped connecting columns ensures that the upper heart-shaped retaining ring cannot impact the carrier cable dropper wire clamp in any state, the parallel distance between the two inverted T-shaped connecting columns ensures that the lower heart-shaped retaining ring cannot impact the contact wire dropper wire clamp in any state, the problem of damage of the dropper wire is solved, the service life is prolonged, tests prove that the fatigue life of the suspension ring type bolt-free integral dropper device can reach more than 700 ten thousand times, which is twice of the fatigue life of the existing stamping integral dropper and a novel bolt-free integral dropper device, the service life of the integral dropper device is greatly prolonged, the overhaul and replacement period is shortened, and great social benefits can be generated due to the large using amount of the integral dropper.
The present invention will be further explained with reference to the drawings.
Drawings
FIG. 1 is a front view of the bail type boltless integral dropper of the present invention;
FIG. 2 is a cross-sectional view taken along A-A in FIG. 1;
FIG. 3 is a left side view of the bail type boltless integral dropper of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3;
FIG. 6 is a rear view of a contact wire dropper clip;
FIG. 7 is a top view of a contact wire dropper clip;
FIG. 8 is a left side view of a contact wire dropper clip;
FIG. 9 is a cross-sectional view taken along line D-D of FIG. 8;
FIG. 10 is a left side view of the contact wire left half dropper clamp before mating with the contact wire right half dropper clamp;
FIG. 11 is a cross-sectional view taken along line E-E of FIG. 10;
FIG. 12 is a perspective view of the contact wire left half dropper clip;
FIG. 13 is a front view of the contact wire left half dropper clip;
FIG. 14 is a right side view of the contact wire left half dropper clip;
FIG. 15 is a view taken along direction F of FIG. 14;
FIG. 16 is a bottom view of the contact wire left half dropper clip;
FIG. 17 is a perspective view of the contact line right hanger clamp;
FIG. 18 is a front view of the contact wire right hanger clamp;
FIG. 19 is a left side view of the contact line right hanger clamp;
fig. 20 is a perspective view of the left messenger wire hanger clamp;
fig. 21 is a bottom view of the messenger wire left half dropper clip;
fig. 22 is a perspective view of the messenger wire right hanger clamp;
fig. 23 is a front view of a messenger wire right hanger clamp;
fig. 24 is a left side view of the messenger right hanger clamp;
fig. 25 is a top view of the messenger right hanger clamp;
fig. 26 is a left side view of a messenger dropper clip;
FIG. 27 is a cross-sectional view taken along line G-G of FIG. 26;
fig. 28 is a rear view of a messenger dropper clip;
fig. 29 is a bottom view of a messenger dropper clip.
Detailed Description
As shown in fig. 1-5, the present invention loop type boltless integral dropper 1000 includes a dropper line 300, a contact line dropper clip 100 and a messenger line dropper clip 200 attached to either end of the dropper line 300.
As shown in fig. 1-3 and 5-11, the contact line dropper clamp 100 comprises a left half dropper clamp 1 and a right half dropper clamp 1 ', which are detachable, the left half dropper clamp 1 and the right half dropper clamp 1' have the same structure, and are inserted together by a positioning and clamping device 11 and an anti-loosening device 12, taking a vertical shaft as a symmetry axis; the positioning and clamping device 11 and the anti-loosening device 12 are positioned in the middle layers of the left half-dropper wire clamp 1 body and the right half-dropper wire clamp 1' body of the contact wire. The positioning and clamping device 11 is composed of a first positioning and clamping pair 111 and a second positioning and clamping pair 112 (see fig. 11). The first positioning and clamping pair 111 is composed of a first positioning pin 1111 and a first positioning groove 1111 ', the first positioning pin 1111 transversely extends rightwards from the body of the left half-string clamp 1 of the contact line, the horizontal section of the first positioning pin 1111 is in a right trapezoid shape, the body of the right half-string clamp 1 ' of the contact line is provided with the first positioning groove 1111 ', the first positioning groove 1111 ' is matched with the first positioning pin 1111 ', and after the first positioning pin 1111 is inserted into the first positioning groove 1111 ', a gap is formed between the right end surface of the first positioning pin 1111 and the right side wall of the first positioning groove 1111 '. A second positioning pin 1121 ' with a right-angled trapezoid horizontal cross section transversely extends leftwards from the body of the contact line right half string clamp 1 ', a second positioning groove 1121 which is matched with the second positioning pin 1121 ' is arranged on the body of the contact line left half string clamp 1, the second positioning pin 1121 ' and the second positioning groove 1121 form a second positioning clamping pair 112 (see fig. 9 and 11), and a straight side surface of the first positioning pin 1111 is parallel to a straight side surface of the second positioning pin 1121 ', and a gap is formed between the straight side surfaces.
As shown in fig. 6 to 19, the locking device 12 is composed of a first locking pair 121 and a second locking pair 122. A first upper straight rack plate 1211 is arranged on the left half dropper clamp 1 body of the contact line and on the right side of the first positioning pin 1111 ', a first lower straight rack plate 1211 ' matched with the first upper straight rack plate 1211 is arranged on the right side of the first positioning groove 1111 ' and on the lower surface of the right half dropper clamp 1 ' body of the contact line, and the first upper straight rack plate 1211 and the first lower straight rack plate 1211 ' form a first anti-loosening pair 121 (see fig. 6). As shown in fig. 9 and 10, a second upper spur rack plate 1221 ' is disposed on the body of the contact line right half string clamp 1 ' and on the left of the second positioning pin 1121 ', a second lower spur rack plate 1221 matched with the second upper spur rack plate 1221 ' is disposed on the lower surface of the body of the contact line left half string clamp 1 and on the left of the second positioning pin 1121, and the second upper spur rack plate 1221 ' and the second lower spur rack plate 1221 form a second anti-loosening pair 122 (see fig. 10). The first upper spur rack plate 1211 is engaged with the first lower spur rack plate 1211 ', and the second upper spur rack plate 1221' is engaged with the second lower spur rack plate 1221. The tooth heights of the teeth of the first upper spur rack plate 1211, the first lower spur rack plate 1211 ', the second upper spur rack plate 1221' and the second lower spur rack plate 1221 are all 0.5 mm.
The plane where the tooth crests of the first upper spur rack plate 1211 are located and the plane where the tooth roots of the first lower spur rack plate 1211' are located are flush with the bottom surface of the first locating pin 1111; the plane where the tooth crest of the second upper spur rack plate 1221 'is located and the plane where the tooth root of the second lower spur rack plate 1221 is located are flush with the bottom surface of the second positioning pin 1121'. The plane where the tooth root of the first lower straight rack plate 1211' is located is flush with the bottom surface of the second positioning groove 1121; the plane where the tooth root of the second lower spur rack plate 1221 is located is flush with the bottom surface of the first seating groove 1111'.
As shown in fig. 6, the upper layer of the contact line left half-string clamp 1 and the contact line right half-string clamp 1 ' is respectively provided with two half inverted T-shaped holes 131, 131 ' by taking the transverse axis of the contact line string clamp body as a symmetry axis, and the four half inverted T-shaped holes 131 and 131 ' form two inverted T-shaped holes 13, as shown in fig. 6, the contact line string clamp 100 further comprises a lower hanging ring 10, the lower hanging ring 10 is formed by die forging of a copper-nickel alloy, as shown in fig. 8, the lower hanging ring 10 comprises a lower ring body 101 and inverted T-shaped connecting posts 102, 102 ' integrally formed at two end portions of the lower ring body 101, and the shapes of the inverted T-shaped connecting posts 102, 102 ' are matched with the shapes of the inverted T-shaped holes 13, and can be respectively clamped in the two inverted T-shaped holes 13 and can only slightly move in the using process.
The lower layer of the body of the contact line left half-hanging string clamp 1 is provided with a wire clamping claw 141, the lower layer of the body of the contact line right half-hanging string clamp 1 'is provided with a wire clamping claw 141', the two wire clamping claws are symmetrically arranged by taking the transverse axis of the contact line hanging string clamp body as a symmetry axis, and the two wire clamping claws 141 and 141 'are respectively matched with wire clamping grooves 6001 and 6001' (see fig. 2 and 3) of a clamped contact line 600. As shown in fig. 8, a first threaded through hole 15 for detachment is formed at the left end of the second positioning groove 1121 and on the contact line left half string clamp 1 body, the position of the first threaded through hole 15 is aligned with the left end face of the second positioning pin 1121 ', a second threaded through hole 15 ' for detachment is formed at the right end of the first positioning groove 1111 ' and on the contact line right half string clamp 1 ' body, and the position of the second threaded through hole 15 ' is aligned with the right end face of the first positioning pin 1111.
The external shape of the middle lower part of the contact wire dropper body is a cuboid, the front side wall 16 of the contact wire dropper is formed by splicing the side wall 161 of the second positioning groove 1121 connected with the contact wire left half dropper clip 1 body with the side wall 161 'of the contact wire right half dropper clip 1' body matched with the side wall (see fig. 1), the rear side wall 17 of the contact wire dropper is formed by splicing the side wall 171 'of the first positioning groove 1111' connected with the contact wire right half dropper clip 1 'body with the side wall 171 of the contact wire left half dropper clip 1 body matched with the first positioning groove 1111' (see fig. 6), the insertion end of the side wall 171 'of the first positioning groove 1111' is semicircular, and the insertion end of the side wall 161 of the second positioning groove 1121 is semicircular.
The angle formed by the straight side surface of the first positioning pin 1111 and the inclined side surface is 5 °, and the angle formed by the straight side surface of the first positioning slot 1111' and the inclined side surface is 5 ° (not shown). An angle formed by the side straight surface of the second positioning pin 1121' and the side inclined surface is 5 °, and an angle formed by the side straight surface of the second positioning slot 1121 and the side inclined surface is 5 ° (not shown in the figure).
As shown in fig. 8 and 9, the left end face of the middle part of the contact line left half-string clamp 1 body and the right end face of the middle part of the contact line right half-string clamp 1 ' body are respectively provided with a first threading round hole 18 and a second threading round hole 18 ', the first threading round hole 18 and the second threading round hole 18 ' are respectively parallel to the first threading through hole 15 and the second threading through hole 15 ', the first threading round hole 18 is communicated with the second threading round hole 18 ' and is not coaxial when the contact line left half-string clamp 1 and the contact line right half-string clamp 1 ' are clamped, the distance between the axis of the first threading round hole 18 and the axis of the second threading round hole 18 ' is S, S is greater than 0, the first threading round hole 18 and the second threading round hole 18 ' are through holes, and the axis of the first threading round hole 18 and the axis of the second threading round hole 18 ' use the transverse axis of the contact line string clamp body as a symmetrical axis.
As shown in fig. 1-4 and 20-29, the carrier cable dropper clamp 200 is composed of a left carrier cable dropper clamp 2 and a right carrier cable dropper clamp 2 'which are detachable, the left carrier cable dropper clamp 2 and the right carrier cable dropper clamp 2' have the same structure, and are inserted together by a clamping and positioning device 21 and a locking device 22 with a vertical axis as a symmetry axis.
As shown in fig. 1-4, 20-29, the clamp positioning device 21 and the anti-loosening device 22 of the messenger wire dropper clip 200 are located at the middle level of the left messenger wire dropper half 2 body and the right messenger wire dropper half 2' body. The clamping and positioning device 21 of the messenger wire dropper clamp 200 consists of a first clamping and positioning pair 211 and a second clamping and positioning pair 212 (see fig. 27). A first positioning pin 2111 with a right-angled trapezoid horizontal section is transversely and rightwards extended from the left messenger wire clamp 2 body, a first positioning groove 2111 ' is arranged on the right messenger wire clamp 2 ' body, and the first positioning pin 2111 and the first positioning groove 2111 ' are matched to form a first clamping and positioning pair 211 (see fig. 27); the body of the carrier cable right half dropper wire clamp 2 ' transversely extends leftwards to form a positioning pin II 2121 ' with a right trapezoid horizontal section, the body of the carrier cable left half dropper wire clamp 2 is provided with a positioning groove II 2121, and the positioning pin II 2121 ' and the positioning groove II 2121 are matched to form a clamping positioning pair II 212 (see fig. 27). The straight side surface of the first positioning pin 2111 is parallel to the straight side surface of the second positioning pin 2121' with a gap.
As shown in fig. 20 to 25, the anti-loosening device 22 of the messenger wire dropper clamp 200 comprises a first anti-loosening pair 221 and a second anti-loosening pair 222, wherein the first anti-loosening pair 221 comprises a first lower straight rack plate 2211 arranged on the right of the first positioning pin 2111 and positioned on the body of the messenger wire left half dropper clamp 2, a first upper straight rack plate 2211 ' matched with the first lower straight rack plate 2211 arranged on the right of the first positioning pin 2111 ' and positioned on the body of the messenger wire right half dropper clamp 2 ' (see fig. 28), and the second anti-loosening pair 222 comprises a second lower straight rack plate 2221 ' arranged on the left of the positioning pin 2121 ' and positioned on the body of the messenger wire right half dropper clamp 2 ' and a second upper straight rack plate 2221 ' matched with the second lower straight rack plate 2221 arranged on the left of the positioning pin 2121 and positioned on the body of the messenger wire left half dropper clamp 2 (see fig. 3). The plane where the tooth tops of the first lower straight rack plate 2211 are located is flush with the top surface of the first positioning pin 2111, and the plane where the tooth tops of the second lower straight rack plate 2221 'are located is flush with the top surface of the second positioning pin 2121'. The plane where the tooth root of the first upper spur rack plate 2211 'is located is flush with the top surface of the second positioning groove 2121, and the plane where the tooth root of the second upper spur rack plate 2221 is located is flush with the top surface of the first positioning groove 2111'.
As shown in fig. 28, the lower layer of the body of the carrier cable left half-dropper clamp 2 and the carrier cable right half-dropper clamp 2 ' is respectively provided with two half T-shaped holes 231, 231 ' and two T-shaped holes 23 formed by four half T-shaped holes 231 and 231 ' by taking the transverse axis of the carrier cable dropper clamp body as a symmetry axis, as shown in fig. 3, the carrier cable dropper clamp 200 further comprises an upper hanging ring 20, the upper hanging ring 20 is formed by forging copper-nickel alloy, the upper hanging ring 20 comprises an upper ring body 201 and T-shaped connecting posts 202, 202 ' integrally formed at two end portions of the upper ring body 201, and the shapes of the T-shaped connecting posts 202, 202 ' are matched with the shapes of the T-shaped holes 23 and can be respectively clamped in the two T-shaped holes 23 and only slightly move in the use process.
As shown in fig. 20-29, the upper layer of the body of the carrier cable left half-dropper clamp 2 and the carrier cable right half-dropper clamp 2 ' is respectively provided with a semicylinder body by taking the transverse axis of the carrier cable dropper clamp body as a symmetry axis, the cylinder body formed by the two semicylinders 241, 241 ' is matched with the carrier cable 700 (see fig. 3), the inner wall of the semicylinder body 241 of the carrier cable left half-dropper clamp 2 body is provided with a plurality of circumferential anti-slip grooves 2411 at intervals (see fig. 20), and the inner wall of the semicylinder body 241 ' of the carrier cable right half-dropper clamp 2 ' body is also provided with a plurality of anti-slip grooves 2411 ' corresponding to the semicylinder body 241 (see fig. 22). The carrier cable left half-dropper wire clamp 2 body positioned at the left end of the positioning groove II 2121 is provided with a first dismounting threaded through hole 25, the position of the first threaded through hole 25 is aligned with the left end surface of the positioning pin II 2121 ', the right end of the positioning groove I2111 ' is provided with a second dismounting threaded through hole 25 ', the position of the second threaded through hole 25 ' is aligned with the right end surface of the positioning pin I2111, the outer shape of the middle upper part of the carrier cable dropper wire clamp body is a cuboid, the rear side wall 26 of the carrier cable left half-dropper wire clamp is formed by splicing the side wall 261 of the positioning groove II 2121 connected with the carrier cable left half-dropper wire clamp 2 body and the side wall 261 ' of the carrier cable left half-dropper wire clamp 2 ' body matched with the positioning groove II 2121 with the carrier cable left half-dropper wire clamp 2 body (see figure 2), the front side wall 27 of the carrier cable left half-dropper wire clamp 2 body is formed by splicing the side wall 271 ' of the positioning groove I2111 ' connected with the carrier cable right half-dropper wire clamp 2 ' body and the side wall 271 matched with the carrier cable left dropper wire clamp 2 body, the insertion ends of the side walls 271 'and 261 of the first positioning groove 2111' and the second positioning groove 2121 are semicircular.
The tooth heights of the teeth of the first lower straight rack plate 2211 and the first upper straight rack plate 2211 'are 0.5mm, and the tooth heights of the teeth of the second lower straight rack plate 2221' and the second upper straight rack plate 2221 are 0.5 mm. The angle formed by the side straight surfaces of the first positioning pin 2111 and the second positioning pin 2121 'and the side inclined surface is 5 degrees, and the angle formed by the side straight surfaces of the first positioning groove 2111' and the second positioning groove 2121 and the side inclined surface is 5 degrees.
As shown in fig. 26 and 27, the left end face of the middle part of the carrier cable left half-dropper clamp 2 body is provided with a first threading round hole 28, the first threading round hole 28 is parallel to a first threaded through hole 25, the right end face of the middle part of the carrier cable right half-dropper clamp 2 ' body is provided with a second threading round hole 28 ', the second threading round hole 28 ' is parallel to a second threaded through hole 25 ', the first threading round hole 28 is communicated with the second threading round hole 28 ' and is not coaxial when the carrier cable left half-dropper clamp 2 and the carrier cable right half-dropper clamp 2 ' are clamped, the distance between the axis of the first threading round hole 28 and the axis of the second threading round hole 28 ' is S ', S ' is greater than 0, the first threading round hole 28 and the second threading round hole 28 ' are through holes, and the axis of the first threading round hole 28 and the axis of the second threading round hole 28 ' take the transverse axis of the carrier cable dropper clamp body as a symmetrical axis.
The diameters of the first threaded through hole 15, the second threaded through hole 15 ', the first threaded through hole 25 and the second threaded through hole 25' are 6 mm.
As shown in fig. 1 to 5, the dropper wire 300 includes a wire body 31, an upper pressure connection pipe 32, a lower pressure connection pipe 33, an upper heart-shaped protection ring 34, and a lower heart-shaped protection ring 35, wherein the upper heart-shaped protection ring 34 and the lower heart-shaped protection ring 35 are made of 316L stainless steel, the upper heart-shaped protection ring 34 is sleeved on the upper hanging ring 20, the lower heart-shaped protection ring 35 is sleeved on the lower hanging ring 10, the upper end of the wire body 31 bypasses the upper heart-shaped protection ring 34 and is inserted into the first threading round hole 28 and the second threading round hole 28 'and is clamped, the lower end of the wire body 31 bypasses the lower heart-shaped protection ring 34 and is inserted into the first threading round hole 18 and the second threading round hole 18' and is clamped, the upper pressure connection pipe 32 is attached to the end of the upper heart-shaped protection ring 34 and wraps and compresses the folded wire bodies, and the lower pressure connection pipe 33 is attached to the end of the lower heart-shaped protection ring 35 and wraps and compresses the folded wire bodies. The upper crimping pipe 32 is provided with an upper wire body crimping hole along the length direction, the lower crimping pipe 33 is provided with a lower wire body crimping hole along the length direction, two folded wire bodies positioned at the upper end are crimped in the upper wire body crimping hole, and two folded wire bodies positioned at the lower end are crimped in the lower wire body crimping hole. The upper pressure connecting pipe and the lower pressure connecting pipe are provided with 3 annular pressure grooves at intervals, the distance between every two adjacent annular pressure grooves is 5mm, and the width of each annular pressure groove is 5 mm.
The curvature of the curved surface of the upper hanging ring 20 contacted with the upper heart-shaped protective ring 34 is the same, and the two are in line contact after being stressed. The curvatures of the curved surfaces of the lower hanging ring 10 and the lower heart-shaped protective ring 35 are the same, and the two are in line contact after being stressed.
The lower eye 10 includes two inverted T-shaped attachment posts 102 and 102' to ensure that the bottom of the lower heart-shaped retaining ring is properly spaced from the top of the contact wire dropper body to ensure that the dropper cannot impact the top surface of the contact wire dropper body at any time, whether the dropper is in a tensioned or relaxed state. Similarly, the upper eye 20 includes two T-shaped connecting posts 202 and 202' to ensure that the top of the upper heart-shaped grommet is properly spaced from the bottom of the messenger dropper body to ensure that the dropper cannot strike the bottom of the body at any time, whether the dropper is in a tensioned or relaxed state.
The lower suspension ring 10 comprises a lower ring body 101, the inner contour shape of the lower ring body 101 is annular, the lower heart-shaped guard ring can be guaranteed to swing freely in the lower suspension ring without limitation and restraint, and therefore the effect that the dropper wire is not subjected to repeated bending force at the lower pressure welding pipe is guaranteed. Similarly, the upper hanging ring 20 comprises an upper ring body 201, the inner contour shape of the upper ring body 201 is annular, so that the upper heart-shaped guard ring can be ensured to swing freely in the upper hanging ring without limitation and restraint, and the effect that the dropper wire is not subjected to repeated bending force at the upper pressure connecting pipe is further ensured.
The tensile strength of the contact wire dropper wire clamp 100 and the carrier cable dropper wire clamp 200 is more than or equal to 17.5kN, and the fatigue times of the whole dropper device are 700 ten thousand.
The upper and lower pressure connecting pipes are made of pure copper and have the material brand of T2, the upper and lower pressure connecting pipes and the wire body are in pressure connection by adopting an integral dropper pressure connection machine, the pressure is 200kN, and the breaking force after pressure connection is more than or equal to 3.9 kN.
The contact wire dropper wire clamp body and the carrier cable dropper wire clamp body are made of cast aluminum bronze of the same grade, the grade is QCuAl9Fe4Ni4Mn2, and the forming process of the contact wire dropper wire clamp body and the carrier cable dropper wire clamp body is investment casting. The upper hanging ring and the upper heart-shaped protective ring are a pair of friction pairs, the lower hanging ring and the lower heart-shaped protective ring are a pair of friction pairs, the upper heart-shaped protective ring and the lower heart-shaped protective ring are made of 316L stainless steel, the upper hanging ring and the lower hanging ring are made of a copper alloy material CuAl10-5-5 containing nickel, nickel is dissolved in a copper matrix, and the copper matrix is manufactured through die forging and a heat treatment process, so that crystal grains are refined, the nickel elements are uniformly distributed in the copper matrix, and the hardness and the strength of the copper matrix are matched with those of 316L.
As shown in fig. 1-5, the installation process of the ring-type bolt-free integral dropper of the invention is as follows:
(1) before installing the contact wire dropper wire clamp 100 and the carrier cable dropper wire clamp 200, prefabricating a dropper wire 300: according to the design requirements, the lengths of the vertical section and the bending section of the wire body 31 of the dropper are measured, the upper end and the lower end of the wire body 31 are respectively provided with an upper crimping pipe 32 and a lower crimping pipe 33, the upper end of the wire body 31 is wound around an upper heart-shaped protective ring 34 for one circle and then penetrates out of the upper crimping pipe 32, the lower end of the wire body 31 is wound around a lower heart-shaped protective ring 35 for one circle and then penetrates out of the lower crimping pipe 33 in the same way, then the dropper is tensioned on a crimping platform, and a specified gap is ensured to be reserved between the lower crimping pipe 33 and the lower heart-shaped protective ring 35. The connecting pipes are pressed up and down under specified pressure, and when the connecting pipes are plastically deformed, the dropper wire is prefabricated successfully.
(2) Installing the contact line dropper wire clamp 100:
the lower hanging ring 10 is sleeved on the lower heart-shaped retaining ring 35, then the two inverted T-shaped connecting columns 102 and 102 'of the lower hanging ring 10 are placed in the inverted T-shaped holes 13 of the wire clamps, the lower end part of the wire body 31 penetrates in and penetrates out of the left end and the right end of the first threading round hole 18 of the contact line left half hanging string wire clamp 1, penetrates in and penetrates out of the left end and the right end of the second threading round hole 18' of the contact line right half hanging string wire clamp 1 ', the wire clamping groove 6001 of the contact line 600 is matched with the wire clamping claw 141 of the contact line left half hanging string wire clamp 1 body, the wire clamping claw 141' of the right half hanging string wire clamp 1 'body is matched with the wire clamping groove 6001' of the contact line 600, and is pushed by a special tool, so that the contact line left half hanging string wire clamp 1 and the contact line right half hanging string wire clamp 1 'are inserted into each other, and as shown in combination with figures 9 and 10, the inclined plane of the first positioning pin 1111 moves along the inclined plane of the first positioning groove 1111' when inserted, the inclined plane of the second positioning pin 1121 'moves along the inclined plane of the second positioning slot 1121 and is pushed until the contact end surfaces of the contact line left half dropper clamp 1 and the contact line right half dropper clamp 1' are completely contacted, at this time, the first upper spur rack 1211 is meshed with the first lower spur rack 1211 ', the second upper spur rack 1221' is meshed with the second lower spur rack 1221, the meshing sound of the spur rack 1211 can be heard in the inserting process, after the left positioning pin is pushed to the right, because the first threading round hole 28 is communicated with the second threading round hole 28 'and is not coaxial, the contact line left half dropper clamp 1 and the contact line right half dropper clamp 1' squeeze the lower end part 400 of the wire body into an oval shape to be clamped (see fig. 2), the lower hanging ring 10 is vertically erected on the top of the contact line dropper clamp body and can be slightly moved, and the contact line dropper clamp 100 clamps the contact line 600.
(3) Installing carrier cable dropper wire clamp 200:
the upper hanging ring 20 is sleeved on the upper heart-shaped retaining ring 34, then two T-shaped connecting columns 202 and 202 ' of the upper hanging ring 20 are placed into T-shaped holes 23 of the wire clamps, the upper end part of a wire body 31 penetrates in and out of the left end and the right end of a threading round hole I28 of a carrier cable left half-dropper wire clamp 2, penetrates in and out of the left end and the right end of a threading round hole II 28 ' of a carrier cable right half-dropper wire clamp 2 ', then the carrier cable 700 is placed in a semi-cylinder 241 of a carrier cable left half-dropper wire clamp 1 body to be matched with the semi-cylinder, then a semi-cylinder 241 ' of a carrier cable right half-dropper wire clamp 2 ' body is matched with the carrier cable 700, and a special tool is used for pushing, so that the carrier cable left half-dropper wire clamp 2 and the carrier cable right half-dropper wire clamp 2 ' are mutually inserted, and the inclined plane of a positioning pin I2111 moves along the inclined plane of a positioning groove 2111 ' when the positioning pin II is inserted, the inclined plane moves along the inclined plane of a positioning groove 2121, the force is pushed until the contact end faces of the carrier cable left half dropper wire clamp 2 and the carrier cable right half dropper wire clamp 2 'are completely contacted, at the moment, the lower straight rack plate I2211 is meshed with the upper straight rack plate I2211', the lower straight rack plate II 2221 'is meshed with the upper straight rack plate II 2221, the meshing sound of the straight rack plates can be heard in the inserting process, after the force is pushed to the right position, the carrier cable left half dropper wire clamp 2 and the carrier cable right half dropper wire clamp 2' clamp the upper end 500 of the wire body 31 into an oval shape (shown in figure 2), the upper hanging ring 20 is vertically erected on the lower portion of the carrier cable dropper wire clamp body, and the carrier cable dropper wire clamp 200 can be micro-actuated to clamp the carrier cable 700.
The hanging ring type bolt-free integral hanging string has the following functions:
1. the invention relates to a hanging ring type bolt-free integral hanging string, which has the following clamping principle: the positioning pin and the positioning groove are respectively provided with a corresponding inclined surface, the slopes are equal, when external force (clamping force) is applied to enable the two half-string clamps to be inserted into each other, the inclined surface of the positioning pin moves along the inclined surface of the positioning groove, the clamping force along the inclined surface can be decomposed into horizontal component force and vertical component force, the horizontal component force enables the two half-string clamps to be inserted into each other, the vertical component force enables the two half-string clamps to approach each other until the contact surfaces of the two half-string clamps are contacted with each other, and finally the contact line or the carrier cable is clamped.
2. In the hanging ring type bolt-free integral dropper, the bolt-free contact wire dropper wire clamp and the bolt-free carrier cable dropper wire clamp are respectively provided with the anti-loosening device and the threaded through hole for disassembly, the anti-loosening devices can keep two half dropper wire clamps in a locked state after being clamped, and the wire clamps cannot be loosened without external force pushing; the upper and lower straight rack plates are respectively arranged at two ends of the wire clamp of the dropper wire clamp, so that double looseness prevention can be realized, the looseness prevention force is uniformly distributed on the wire clamp, and the looseness prevention reliability is improved. The two locked half-dropper wire clamps can be separated by matching the screw thread through holes for disassembly and the bolts, and can be repeatedly used after separation. When the wire clamp does not need to be disassembled, the threaded through hole for disassembly is plugged by the plastic round head, when the wire clamp needs to be disassembled, the plastic round head is pulled out, the matched bolt is screwed in the threaded through hole for disassembly, after the bolt is screwed in the threaded through hole for disassembly, the end part of the bolt is propped against the left end surface or the right end surface of the positioning pin, and along with the continuous screwing in of the bolt, the two half dropper wire clamps are acted by a pair of forces with equal size and opposite directions, so that the two half dropper wire clamps are gradually separated.
3. The contact wire dropper wire clamp body and the carrier cable dropper wire clamp body are designed to be symmetrical structures, only one set of die is adopted during production, not only can the processing cost be reduced, but also the produced wire clamp is good in consistency, so that the stress of the wire clamp is more reasonable, and the work is more reliable.
4. The upper end of the wire body penetrates through the first threading round hole or the second threading round hole and penetrates out of the second threading round hole or the first threading round hole, after the left catenary dropper wire clamp and the right catenary dropper wire clamp are inserted into each other, the wire body is clamped and extruded into an ellipse at the middle part of the clamping and positioning device due to the fact that the first threading round hole is communicated with the second threading round hole and is not coaxial, and compression joint type electric contact is formed, so that a perfect conductive channel is formed between the dropper wire and the catenary dropper wire clamp, and the conductive reliability of a joint is improved; similarly, the upper end of the lower stub wire is connected with the dropper wire into a whole through the lower pressure connecting pipe in a pressure joint mode, the lower end of the wire body penetrates through the first threading round hole or the second threading round hole and penetrates out of the second threading round hole or the first threading round hole, and after the contact wire left half dropper wire clamp and the contact wire right half dropper wire clamp are inserted into each other, the wire body is clamped and extruded into an ellipse through the middle part of the positioning and clamping device due to the fact that the first threading round hole is communicated with the second threading round hole and is not coaxial, pressure joint type electric contact is formed, a perfect electric conduction channel is formed between the dropper wire and the contact wire dropper wire clamp, and electric conduction reliability of a joint is improved.
The structure of the hanging ring type bolt-free integral hanging string determines that the hanging ring type bolt-free integral hanging string has the functions of clamping, looseness prevention, electric conduction and repeated disassembly, and because bolts are not used, the looseness of the bolts in vibration is avoided, and the reliability of a contact net system is greatly improved. In addition, the hanging ring type bolt-free integral dropper has the advantages of high static strength and long service life, the service life can be greatly prolonged, the overhaul replacement period of the integral dropper is prolonged, the operation cost is reduced, and the test is as follows:
(1) fatigue test
The national railway product quality supervision and inspection center performs fatigue-resistant times comparison tests on the integral dropper imported at early stage and made in China according to TB/T2073-2020 clause 5.3.13, TB/T2075-2020 part 7 and TJ/GD034-2020 temporary technical conditions for integral dropper inspection of contact networks of electrified railways, and the results are as follows:
an inlet piece: when the fatigue frequency reaches 80 ten thousand times, the dropper is broken at the compression joint.
A domestic part: when the fatigue frequency reaches 350 ten thousand times, the key parts are worn to the limit, and the test cannot be continuously carried out.
Using the same test method and the same test apparatus, we also performed fatigue tests on the eye type boltless integral dropper, and the results were as follows:
the hanging ring type bolt-free integral hanging string: when the fatigue times reach 350 ten thousand, the wear area of the key part accounts for 1/10 of the whole worn area, the test can be continued, and when the fatigue times reach 700 ten thousand, the wear area accounts for 3/10 of the whole worn area, and the test can be continued to use.
(2) Static Strength test
Wire clamp for domestic punching type integral dropper is less than or equal to 8.5kN
Used fastener of whole dropper of hanging ring formula boltless bolt: not less than 17.5kN
The two tests show that the hanging ring type bolt-free integral dropper is superior to a stamping type integral dropper device in static strength and fatigue life, if the hanging ring type bolt-free integral dropper device is used in operation, the service life of the integral dropper device can be prolonged, and the overhaul operation cost is greatly reduced. In addition, the bolt-free integral dropper device does not need to be checked during operation, and is particularly suitable for being used in a contact net in a special or complex environment.
As for the bolt-free integral dropper device mentioned in the background technology, as the wire clamp and the dropper wire are connected by adopting the ball head-ball socket, the swing angle of the crimping pipe is found to be less than 60 degrees in the test, the dropper wire is easily damaged due to limited swing, the bending life of the dropper wire is limited when the fatigue times reach 350 ten thousand, the dropper wire is broken, and the service life is shorter than that of the device. This application adopts the connected mode of ring and ring, except the material performance adaptation that chooses for use between two friction pairs, the heart type retaining ring does not receive any restriction in rings when the contact net vibrates, has eliminated all factors that the string of dropper probably is impaired to improve life, the fatigue number of times reaches more than 700 ten thousand (the standard is specified for 200 ten thousand).
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (11)

1. A contact line dropper wire clamp (100) consists of a left half dropper wire clamp (1) and a right half dropper wire clamp (1 ') which are detachable, the left half dropper wire clamp and the right half dropper wire clamp (1') of the contact line have the same structure, and are inserted together by a positioning and clamping device (11) and a locking device (12) with a vertical axis as a symmetry axis,
the positioning and clamping device (11) and the anti-loosening device (12) are positioned in the middle layers of the left and right half-string clamp bodies (1 and 1 ') of the contact line, the positioning and clamping device (11) consists of a first positioning pin (1111) which is connected with the left half-string clamp body of the contact line and transversely extends rightwards, has a right trapezoid horizontal section, a first positioning clamping pair (111) which is matched with the first positioning pin and is formed by a first positioning groove (1111 ') on the right half-string clamp body of the contact line, a second positioning pin (1121 ') which is connected with the right half-string clamp body of the contact line and transversely extends leftwards, has a right trapezoid horizontal section, and a second positioning clamping pair (112) which is matched with the second positioning groove (1121) on the left half-string clamp body of the contact line and is formed by a second positioning pin (1121 '), two side straight surfaces of the first positioning pin (1111) and the second positioning pin (1121 ') are parallel and have a proper gap,
the anti-loosening device (12) consists of a first upper straight rack plate (1211) arranged on the right side of the first positioning pin (1111) and positioned on the contact line left half-string clamp (1) body, a first lower straight rack plate (1211 ') matched with the first upper straight rack plate (1211) arranged on the right side of the first positioning groove (1111') and positioned below the contact line right half-string clamp (1 ') body, a second upper straight rack plate (1221') arranged on the left side of the second positioning pin (1121 ') and positioned on the contact line right half-string clamp (1') body, a second upper straight rack plate (1221 ') matched with the second upper straight rack plate (1221') and positioned on the left side of the second positioning groove (1121) and positioned below the contact line left half-string clamp (1) body, and a second anti-loosening pair (122) matched with the second upper straight rack plate (1211), 1221 ') the plane of the tooth top is flush with the bottom surface of the first and second positioning pin (1111, 1121'), the plane of the tooth root of the first and second lower straight rack plate (1211 ', 1221) is flush with the bottom surface of the second and first positioning slot (1121, 1111'), the lower layer of the contact line left half-hanger wire clamp (1) and the contact line right half-hanger wire clamp (1 ') is respectively provided with a wire clamping claw by taking the transverse axis of the contact line hanger wire clamp body as a symmetry axis, the two wire clamping claws (141, 141') are respectively matched with the wire clamping slot of the clamped contact line,
a first threaded through hole (15) for disassembly is formed in a contact line left half string clamp body (1) positioned at the left end of the second positioning groove (1121), the position of the first threaded through hole (15) is aligned to the left end face of the second positioning pin (1121 '), a second threaded through hole (15 ') for disassembly is formed in a contact line right half string clamp body (1 ') positioned at the right end of the first positioning groove (1111 '), the position of the second threaded through hole (15 ') is aligned to the right end face of the first positioning pin (1111),
the external shape of the middle lower part of the contact line dropper wire clamp body is a cuboid, the front side wall (16) of the contact line dropper wire clamp body is formed by splicing the side wall (161) of a second positioning groove (1121) connected with the contact line left half dropper wire clamp (1) body with the side wall (161 ') of the contact line right half dropper wire clamp (1') body matched with the side wall, the rear side wall (17) of the contact line dropper wire clamp body is formed by splicing the side wall (171 ') of a first positioning groove (1111') connected with the contact line right half dropper wire clamp (1 ') body with the side wall (171) of the contact line left half dropper wire clamp (1) body matched with the first positioning groove (1111') and the second positioning groove (1111 ', 1121) respectively, the inserting ends of the side walls (171', 161) are semicircular,
the left end face of the middle part of the contact line left half-string clamp (1) body and the right end face of the middle part of the contact line right half-string clamp (1 ') body are respectively provided with a first threading round hole (18) and a second threading round hole (18 '), the first threading round hole (18) and the second threading round hole (18 ') are respectively parallel to a first thread through hole (15) and a second thread through hole (15 ') respectively, under the clamping state of the contact line left half-string clamp (1) and the contact line right half-string clamp (1 '), the first threading round hole (18) is communicated with the second threading round hole (18 ') and is not coaxial, the distance between the axis of the first threading round hole (18) and the axis of the second threading round hole (18 ') is S, S is more than 0, the first threading round hole (18) and the second threading round hole (18 ') are through holes, the axis of the first threading round hole (18) and the axis of the second threading round hole (18 ') use the transverse axis of the contact line string clamp body as a symmetrical shaft,
the method is characterized in that: the contact line left half-string hanging wire clamp (1) and the contact line right half-string hanging wire clamp (1 ') are respectively provided with two half inverted T-shaped holes (131, 131 ') on the front and back end faces of the upper layer of the body by taking the transverse axis of the contact line hanging wire clamp body as a symmetry axis, the four half inverted T-shaped holes (131, 131 ') form two inverted T-shaped holes (13), the contact line hanging wire clamp (100) further comprises a lower hanging ring (10), the lower hanging ring (10) is formed by die forging nickel-containing copper alloy, nickel is dissolved into a copper base body before die forging, the lower hanging ring (10) comprises a lower ring body (101) and inverted T-shaped connecting columns (102, 102 ') integrally formed at the two end parts of the lower ring body (101), and the shapes of the inverted T-shaped connecting columns (102, 102 ') are matched with the shapes of the inverted T-shaped holes (13) and can be clamped in the inverted T-shaped holes (13).
2. The contact line dropper clamp of claim 1, wherein: the tooth heights of the teeth of the first upper straight rack plate (1211), the first lower straight rack plate (1211 '), the second upper straight rack plate (1221'), and the second lower straight rack plate (1221) are 0.5 mm.
3. The contact line dropper clamp of claim 2, wherein: the diameter of the first and second threaded through holes (15, 15') is 6 mm.
4. The contact line dropper clamp of claim 3, wherein: the angle formed by the side straight surfaces and the side inclined surfaces of the first positioning pin (1111 ', 1121) and the second positioning pin (1111, 1121 ') is 5 degrees, and the angle formed by the side straight surfaces and the side inclined surfaces of the first positioning pin (1111 ', 1121) is 5 degrees.
5. A carrier cable dropper wire clamp (200) consists of a left carrier cable dropper wire clamp (2) and a right carrier cable dropper wire clamp (2 ') which are detachable, the left and right carrier cable dropper wire clamps (2, 2') have the same structure and are inserted together by a clamping and positioning device (21) and a locking device (22) by taking a vertical shaft as a symmetrical shaft,
the clamping and positioning device (21) and the anti-loosening device (22) are positioned in the middle layers of the left and right carrier cable dropper wire clamp bodies (2 and 2 '), the clamping and positioning device (21) consists of a first clamping and positioning pair (211) which is connected with the left carrier cable dropper wire clamp body (2), extends out transversely to the right and has a right trapezoid horizontal section, a first positioning pin (2111 ') matched with the first positioning pin (2111 ') on the right carrier cable dropper wire clamp body and forms a first clamping and positioning pair (212) which is connected with the right carrier cable dropper wire clamp body, extends transversely to the left and has a right trapezoid horizontal section, a second positioning pin (2121 ') matched with the second positioning pin (2121) on the left carrier cable dropper wire clamp body (2), and two side straight surfaces of the first positioning pin (2111) and the second positioning pin (2121 ') are parallel and have a proper gap,
the anti-loosening device (22) consists of a first lower straight rack plate (2211) arranged on the right of the first positioning pin (2111) and positioned on the body of the carrier cable left half-dropper wire clamp (2), a first anti-loosening pair (221) matched with the first lower straight rack plate (2211) arranged on the right of the first positioning slot (2111 ') and positioned on the body of the carrier cable right half-dropper wire clamp (2 '), and a second anti-loosening pair (222) matched with the first anti-loosening pair and positioned on the left of the second positioning pin (2121 ') and positioned on the body of the carrier cable right half-dropper wire clamp (2), a second lower straight rack plate (2221 ') arranged on the left of the second positioning slot (2121) and positioned on the body of the carrier cable left half-dropper wire clamp (2), and a second anti-loosening pair (222) matched with the second anti-loosening pair and positioned on the left of the second positioning slot (2121) and positioned on the top of the carrier cable left half-dropper wire clamp (2), wherein the plane where the tooth tops of the first lower straight rack plate (2211, the second straight rack plate (2211 ') are positioned and the first positioning pin (2211) and the top of the first positioning pin, The top surfaces of the two (2111, 2121 ') are flush, the plane of the root of the upper straight rack plate I and the two (2211 ', 2221) is flush with the top surfaces of the two positioning grooves I and the two (2121, 2111 '),
the upper layer of the body of the carrier cable left half-dropper wire clamp (2) and the carrier cable right half-dropper wire clamp (2 ') is respectively provided with half cylinders (241, 241') by taking the transverse axis of the carrier cable dropper wire clamp body as a symmetry axis, the inner hole of the cylinder formed by the two half cylinders (241, 241 ') is matched with the carrier cable, a first dismounting threaded through hole (25) is formed on the body of the carrier cable left half-dropper wire clamp (2) positioned at the left end of the second positioning groove (2121), the position of the first threaded through hole (25) is aligned with the left end surface of the second positioning pin (2121'), a second dismounting threaded through hole (25 ') is formed at the right end of the first positioning groove (2111') and on the body of the carrier cable right half-dropper wire clamp (2 '), the position of the second threaded through hole (25') is aligned with the right end surface of the first positioning pin (2111), and the external shape of the middle upper part of the body of the carrier cable dropper wire clamp is a cuboid, the rear side wall (26) is formed by splicing the side wall (261) of the positioning groove II (2121) connected with the body of the bearing cable left half string clamp (2) and the side wall (261 ') of the body of the bearing cable right half string clamp (2') matched with the positioning groove II, the front side wall (27) is formed by splicing the side wall (271 ') of the positioning groove I (2111') connected with the body of the bearing cable right half string clamp (2 ') and the side wall (271) of the body of the bearing cable left half string clamp (2) matched with the positioning groove I (2111'), the insertion ends of the side walls (271 ', 261) of the positioning groove I, the positioning groove II (2111', 2121) are semicircular,
the left end face of the middle part of the carrier cable left half-dropper wire clamp (2) body and the right end face of the middle part of the carrier cable right half-dropper wire clamp (2 ') body are respectively provided with a first threading round hole and a second threading round hole (28, 28 '), the first threading round holes and the second threading round holes (28, 28 ') are respectively parallel to the first threaded through hole and the second threaded through hole (25, 25 '), under the clamping state of the carrier cable left half-dropper wire clamp (2) and the carrier cable right half-dropper wire clamp (2 '), the first threading round holes (28) are communicated with the second threading round holes (28 ') and are not coaxial, the distance between the axis of the first threading round holes (28) and the axis of the second threading round holes (28 ') is S ', S ' is more than 0, the first threading round holes (28) and the second threading round holes (28 ') are through holes, and the axis of the first threading round holes (28) and the axis of the second threading round holes (28 ') take the transverse axis of the carrier cable dropper wire clamp body as a symmetrical axis,
the method is characterized in that: the front end face and the rear end face of a lower layer of a body of the carrier cable left half-dropper wire clamp (2) and the carrier cable right half-dropper wire clamp (2 ') are respectively provided with two half T-shaped holes (231, 231 ') by taking a transverse axis of the carrier cable dropper wire clamp body as a symmetrical axis, the T-shaped holes (23) are formed by the four half T-shaped holes (231, 231 '), the carrier cable dropper wire clamp (200) further comprises an upper hanging ring (20), the upper hanging ring (20) is formed by forging copper-nickel alloy, the upper hanging ring (20) comprises an upper ring body (201) and T-shaped connecting columns (202, 202 ') integrally formed at two end parts of the upper ring body (201), and the shapes of the T-shaped connecting columns (202, 202 ') are matched with the shapes of the T-shaped holes (23) and can be clamped in the T-shaped holes (23).
6. The messenger wire dropper clamp of claim 5, wherein: the tooth height of the teeth of the lower straight rack plate I (2211), the upper straight rack plate I (2211 '), the lower straight rack plate II (2221 ') and the upper straight rack plate II (2221) is 0.5mm, and the diameter of the thread through holes I, II (25, 25 ') is 6 mm.
7. The messenger wire dropper clamp of claim 6, wherein: the inner walls of the semicylindrical bodies (241, 241 ') are provided with a plurality of corresponding circumferential anti-slip grooves (2411, 2411') at intervals.
8. The messenger wire dropper clamp of claim 7, wherein: the angle formed by the side straight surfaces of the first positioning pin and the second positioning pin (2111, 2121 ') and the side inclined surface is 5 degrees, and the angle formed by the side straight surfaces of the first positioning pin and the second positioning pin (2111', 2121) and the side inclined surface is 5 degrees.
9. An eye-type boltless integral dropper (1000), characterized in that: comprising the contact line dropper clip (100) of any of claims 1-4, the messenger dropper clip (200) of any of claims 5-8, and a dropper line (300), wherein:
a dropper line (300) which comprises a line body (31), an upper pressure connecting pipe (32), a lower pressure connecting pipe (33) and an upper heart-shaped protective ring (34), the lower heart-shaped protective ring (35), the upper heart-shaped protective ring (34), the lower heart-shaped protective ring (35) are made of 316L stainless steel, the upper heart-shaped protective ring (34) is sleeved on the upper hanging ring (20), the lower heart-shaped protective ring (35) is sleeved on the lower hanging ring (10), the upper end of the wire body (31) bypasses the upper heart-shaped protective ring (34) and is inserted into the first threading round hole (28) and the second threading round hole (28 ') and is clamped tightly, the lower end of the wire body (31) bypasses the lower heart-shaped protective ring (35) and is inserted into the first threading round hole (18) and the second threading round hole (18') and is clamped tightly, the upper crimping pipe (32) is attached to the end of the upper heart-shaped protective ring (34) and wraps and compresses the folded two wire bodies, and the lower crimping pipe (33) is attached to the end of the lower heart-shaped protective ring (35) and wraps the folded two wire bodies tightly.
10. The eye-type boltless integral dropper of claim 9, wherein: the curvature of the curved surface of the upper hanging ring (20) contacted with the upper heart-shaped retaining ring (34) is the same, and the curvature of the curved surface of the lower hanging ring (10) contacted with the lower heart-shaped retaining ring (35) is the same.
11. The eye-type boltless integral dropper of claim 10 wherein: the tensile strength of the contact wire dropper wire clamp (100) and the carrier cable dropper wire clamp (200) is more than or equal to 17.5kN, and the fatigue times of the whole dropper device are more than 700 ten thousand times.
CN202111072228.8A 2021-09-14 2021-09-14 Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper Pending CN113581024A (en)

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CN202111072228.8A CN113581024A (en) 2021-09-14 2021-09-14 Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper
PCT/CN2022/114238 WO2023040604A1 (en) 2021-09-14 2022-08-23 Contact line dropper wire clamp, carrier cable dropper wire clamp and hanging ring type bolt-free integral dropper

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CN202111072228.8A CN113581024A (en) 2021-09-14 2021-09-14 Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114654406A (en) * 2022-03-23 2022-06-24 中铁建电气化局集团第一工程有限公司 Installation tool assembly for installing dropper on contact wire
WO2023040604A1 (en) * 2021-09-14 2023-03-23 任兴堂 Contact line dropper wire clamp, carrier cable dropper wire clamp and hanging ring type bolt-free integral dropper

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Publication number Priority date Publication date Assignee Title
FR2722148B1 (en) * 1994-07-07 1996-12-27 Dermac Ind DEVICE FOR SUSPENDING AN ELECTRICAL CONDUCTOR FROM A CARRIER CABLE
CN204586552U (en) * 2015-04-10 2015-08-26 中法高速铁路技术(西安)有限公司 A kind of non-bolt current-carrying integral hanger device
CN210680465U (en) * 2019-07-29 2020-06-05 中国铁路总公司 Non-bolt forging type integral dropper
CN110281818A (en) * 2019-07-29 2019-09-27 中国铁路总公司 Non-bolt forging type registration clamp
CN111746354B (en) * 2020-08-05 2024-05-10 中铁建电气化局集团轨道交通器材有限公司 Bolt-free contact wire hanger wire clamp or carrier cable hanger wire clamp and integral hanger device
CN113581024A (en) * 2021-09-14 2021-11-02 任兴堂 Contact wire dropper wire clamp, carrier cable dropper wire clamp and suspension ring type bolt-free integral dropper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023040604A1 (en) * 2021-09-14 2023-03-23 任兴堂 Contact line dropper wire clamp, carrier cable dropper wire clamp and hanging ring type bolt-free integral dropper
CN114654406A (en) * 2022-03-23 2022-06-24 中铁建电气化局集团第一工程有限公司 Installation tool assembly for installing dropper on contact wire

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