CN201260047Y

CN201260047Y - Asymmetric line discharging tackle

Info

Publication number: CN201260047Y
Application number: CNU2008201103537U
Authority: CN
Inventors: 夏拥军; 冯晓红; 裘雅萍; 缪谦
Original assignee: China Electric Power Research Institute Co Ltd CEPRI
Current assignee: China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2008-09-10
Filing date: 2008-09-10
Publication date: 2009-06-17
Anticipated expiration: 2018-09-10

Abstract

The utility model provides a dissymmetrical line tackle, which comprises a hanging plate, a bracket, a wire rope wheel, a lead wheel, a supporting shaft fixed on the bracket, and a matched bearing; the wire rope wheel and the lead wheel can freely rotate around the supporting shaft; the hanging plate is connected on the bracket above the wire rope wheel and the lead wheel; and two or three hanging holes are arranged on the hanging plate. The dissymmetrical line tackle can be hung on a base pole tower in the construction section through utilizing the two or more rigid or soft connecting components. The provided line tackle can generate the imbalance force due to releasing odd number of leads, and the imbalance force can be transmitted to the power transmission pole tower through the connecting component on the hanging holes; the line tackle can not generate the whole turn angle around the axial line of the hanging hole; so the leads are not easily jumped out of the groove so as to satisfy the secure releasing requirements for odd number leads; at the same time, the even number lead releasing can also be considered, thus generating bigger economic and social benefits.

Description

Asymmetric releasing pulley

Technical field

The utility model belongs to high pressure overhead power line construction under tension stringing equipment, relates in particular to a kind of asymmetric releasing pulley.

Background technology

Releasing pulley is the indispensable equipment of high pressure overhead power line construction under tension stringing, and guardwire, raising payingoff construction efficient are played an important role.The pulley of existing releasing pulley adds up to odd number, commonly used have single-wheel releasing pulley, three wheel line tackles, five wheel line tackles, seven-wheel line tackle and nine wheel line tackles etc., in concrete work progress, can satisfy disposable exhibition respectively according to actual track situation and construction requirement and put the needs of single conductor, double bundle conductor, conductors on quad bundled, six-multiple conductor and eight bundle conductors (being that the lead radical is an even number).For the above releasing pulley of single-wheel, releasing pulley such as take turns as three-wheel, five, intermediate pulley is a wire rope pulley, in order to by guiding rope and pull rope (described pull rope mostly is haulage cable), the pulley of bilateral symmetry layout is a guide roller, in order to pass through lead; To the single-wheel releasing pulley, pull rope and lead all pass through in this single-wheel.At first use hauling machine to pull the wire rope pulley of guiding rope pulling traction rope by releasing pulley during construction, the pull rope tail end connects with quilt exhibition lead (can be many) by towing plate, passes through releasing pulley thereby can pull lead.

In order to reduce electric energy loss in the transmission of electricity process, to increase economic efficiency, reduce engineering overall investment and operation cost, the electric pressure of China's high pressure overhead power line is progressively improving, gradually carry out the transition to 330kV, 500kV, 750kV by original 220kV, and even present UHV transmission engineering (± 800kV DC transmission engineering and 1000kV ac transmission engineering) under construction, the sectional dimension of transmission pressure correspondingly and weight are also in continuous increase.For reducing creep causes lead in the payingoff construction influence, convenient observation and adjust sag, require each root lead of multiple fission conductor to open up simultaneously and put.But for large-section lead, its weight is bigger, and an existing hauling machine can't satisfy the needs that many all leads of division are put in disposable exhibition.Lead on the basis of equipment making full use of existing opening, to open the equipment that leads and improve efficiency of construction in order to simplify, sometimes use that many hauling machines are worked simultaneously, to put odd number root lead be that most economical construction plan efficiently is (as for six-multiple conductor to the exhibition of every hauling machine, can use two hauling machines to work simultaneously, three leads are put in every hauling machine exhibition).Implement this construction plan if use existing releasing pulley, because it is odd number that the separate unit coaster is opened up the lead radical of putting simultaneously, thereby cause coaster integral body to be subjected to force unbalance, serious threat construction safety, the utility model promptly are special releasing pulley---the asymmetric releasing pulleys of construction plan research and development for this reason.

The traditional releasing pulley of putting even number root lead that is used to open up shown in Fig. 1 and Fig. 1 a is made up of main parts size such as link plate 3, support 4, wire rope pulley 5, guide rollers 6.The link plate of this kind coaster is provided with a suppending hole 2, this hole is positioned at directly over the wire rope pulley, the hole heart is crossed the coaster centre symmetry line, uses single connector 1 to hang on the transmission tower or directly hangs on the insulator string and (hang 1 coaster at least on the every basic shaft tower in the construction line segment).Because the number of conductors by coaster is an even number, and coaster center line symmetric arrangement relatively, so lead the relative coaster center line of load balance that coaster is applied, coaster can keep the vertical hanging state.Even consider the slightly different and circuit corner of the sag of each root lead in the construction, also can carry out suitably a small amount of the adjusting, thereby coaster can not produced around the bigger whole corner of suppending hole axis by tensioner.

Put odd number root lead if still use traditional releasing pulley form exhibition of single suppending hole, need to install a wire rope pulley and the odd number guide roller identical on the releasing pulley with number of conductors, thereby make pulley add up to even number, no matter this moment, which kind of connector and hang are arranged and used to wire rope pulley and guide roller how, when lead passes through coaster, can't guarantee that all lead is a balance to the relative suppending hole of the load of coaster; If increase a stabilizer on coaster, its weight and solid conductor weight are complementary, the unbalanced load that produces in order to balance odd number root lead, but by pull rope the time coaster integral body stressed be still unbalanced.When the lead of sag is heavier, when promptly out-of-balance force is big, coaster will be produced around the bigger whole corner of suppending hole axis, thereby make lead deviate from the big increase of having a big risk of pulley race, working security is difficult to guarantee.

Not only can be if the coaster that odd number root lead is put in exhibition is designed to breast wheel by the symmetrical structure of haulage cable but also odd number pulley that can be by lead, when then haulage cable is by breast wheel that race surface tear mill is thick, thereby lead by the time lead caused damage, so this scheme is worthless.

The content of utility model

The purpose of this utility model is to overcome existing exhibition to put the balanced type releasing pulley of even number root lead and can not open up the deficiency of putting odd number root lead, puts odd number root lead for exhibition once a kind of safe and reliable novel releasing pulley---asymmetric releasing pulley is provided.

For achieving the above object, the utility model is taked following technical scheme:

Asymmetric releasing pulley of the present utility model mainly comprises link plate, support, wire rope pulley, guide roller, be fixed on parts such as back shaft on the support and self-contained bearing, described wire rope pulley and guide roller can freely rotate around described bolster, above being positioned at described wire rope pulley and guide roller on this support, connect described link plate, on this link plate, be provided with suppending hole.The wire rope pulley of described asymmetric releasing pulley and guide roller add up to even number (can be changed into odd number) by increasing a stabilizer, it is characterized in that: described link plate is provided with two or three suppending holes, and at least respectively there is a suppending hole both sides of coaster center line relatively, the center line with outermost two pulleys in two ends is corresponding respectively to be positioned at the center of this suppending hole of both sides, or about this two pulley center line each pulley spindle in width range.Use two or two above rigidity or flexible connecting member that asymmetric releasing pulley is hung on the every basic shaft tower in the construction line segment.Employed rigidity or flexible connecting member, its length and suspension angles should be determined according to the practical structures form and the bearing capacity of shaft tower, should abide by the principle simultaneously:

(1) when only using two connectors, should guarantee that the suppending hole of coaster symmetrical center line both sides respectively uses one, and should take into account layout angle, make connector and shaft tower stressed rationally;

(2) connector should link to each other with two suspension centres on the shaft tower at least, be two or more suspension centres that should have on the shaft tower not in the same space position, and remain valid with releasing pulley simultaneously and be connected, promptly when using flexible connecting member, should guarantee that any time in the unwrapping wire process has at least two connectors to play a role, promptly be in tension state.

The utility model has the advantages that: link plate is provided with two or three suppending holes, use two or two to hang on the transmission tower with upper connector, after the length of rationally having determined connector and suspension angles, put the out-of-balance force that odd number root lead produces because of exhibition and will pass to the suspension centre of transmission tower by the connector on the suppending hole, guarantee that releasing pulley can not produce the whole corner around the suppending hole axis, thereby make lead can not produce the job-hopping accident.Needs are put in the exhibition that the utility model can satisfy odd number root lead, have higher working security, and the exhibition that also can finish even number root lead is simultaneously put.

Description of drawings

In order to make content of the present utility model, and be convenient to the description of embodiment, provide the accompanying drawing relevant below, be described as follows with the utility model by clearer understanding:

Fig. 1 is traditional five wheel line tackle structural representations.

Fig. 1 a is the left view of Fig. 1.

Fig. 2 is an asymmetric releasing pulley structural representation of the present utility model.

Fig. 2 a is the left view of Fig. 2.

Fig. 3 is the asymmetric releasing pulley structural representation of band stabilizer of the present utility model.

Fig. 3 a is the left view of Fig. 3.

Embodiment

Be asymmetric releasing pulley of the present utility model shown in Fig. 2, Fig. 2 a and Fig. 3, Fig. 3 a, it is made up of main parts size such as link plate 9, support 10, wire rope pulley 11 and guide rollers 12, wherein wire rope pulley 11 and guide roller 12 adds up to the even number (see figure 2), by increasing a stabilizer 13, add wire rope pulley 11 and guide roller 12, the pulley sum can be changed into the odd number (see figure 3).Be with the maximum difference of traditional releasing pulley, the link plate of asymmetric releasing pulley of the present utility model is provided with two suppending hole 8 (see figure 2)s or three suppending hole 8 (see figure 3)s, and no matter be embodiment illustrated in fig. 2 or embodiment illustrated in fig. 3, respectively there is a suppending hole 8 both sides that all guarantee relative coaster center line (Y-axis among Fig. 2,3), the center of this suppending hole 8 respectively with the center line corresponding (seeing shown in Fig. 2,3) of outermost two pulleys in two ends, or the center of this suppending hole 8 respectively about this two pulley center line each pulley spindle in width range.Every coaster uses two or two above rigidity or flexible connecting member 7 that coaster is hung on the every basic shaft tower in the construction line segment.The length of employed rigidity or flexible connecting member 7 and suspension angles should be determined according to the specific constructive form and the bearing capacity of shaft tower, should guarantee simultaneously: when only using two connectors, the suppending hole of coaster center line both sides respectively uses one, and should take into account layout angle, make connector and shaft tower stressed rationally; Connector should link to each other with two suspension centres on the shaft tower at least, be two or more suspension centres (promptly having at least two connectors 7 not answer on the same position of colligation at shaft tower) that should have on the shaft tower not in the same space position, and remain valid with releasing pulley simultaneously and be connected, promptly when using flexible connecting member, should guarantee that any time in the unwrapping wire process has at least two connectors to play a role, promptly be in tension state.

After the length and suspension angles of the position of rationally having determined suppending hole and connector, put the out-of-balance force that odd number root lead produces because of exhibition and will pass to transmission tower by the connector that passes suppending hole, releasing pulley can not produce the whole corner around the suppending hole axis, thereby making lead be difficult for job-hopping deviates from, needs are put in the exhibition of having satisfied odd number root lead under the prerequisite that has guaranteed working security, the exhibition that also can be used for simultaneously even number root lead is put, and will produce bigger economic benefit and social benefit.

Claims

1, a kind of asymmetric releasing pulley, mainly comprise link plate, support, pulley, be fixed on back shaft and self-contained bearing on the support, described pulley comprises wire rope pulley and guide roller, described wire rope pulley and guide roller can freely rotate around described bolster, above being positioned at described wire rope pulley and guide roller on this support, connect described link plate, be provided with suppending hole on this link plate, it is characterized in that: link plate has two or three suppending holes.

2, asymmetric releasing pulley according to claim 1 is characterized in that: described wire rope pulley number is 1, and the guide roller number is an odd number, and described pulley adds up to even number.

3, asymmetric releasing pulley according to claim 2 is characterized in that: a pulley of increase and other described pulleys are set up in parallel on the basis of described even number pulley.

4, asymmetric releasing pulley according to claim 3 is characterized in that: the pulley of described increase is stabilizer or guide roller.

5, asymmetric releasing pulley according to claim 1, it is characterized in that: the position of the suppending hole of described link plate is: at least respectively there is a suppending hole both sides of coaster symmetrical center line, and the center of the described suppending hole of the both sides center line with outermost two pulleys in two ends respectively is corresponding, or about these two pulley center lines each pulley spindle in width range.

6, asymmetric releasing pulley according to claim 1, it is characterized in that: also comprise rigidity or flexible connecting member more than two or two, it is connected with described suppending hole, by this connector asymmetric releasing pulley is hung on the every basic shaft tower of construction in the line segment.

7, asymmetric releasing pulley according to claim 6 is characterized in that: described connector is remained valid with asymmetric releasing pulley and is connected, and promptly when using flexible connecting member, any time has at least two connectors to play a role, and promptly is in tension state.