CN111907378B - Passenger-cargo collinear carrier cable and contact line synchronous replacement construction process - Google Patents

Abstract

The invention discloses a passenger-cargo collinear carrier cable and contact line synchronous replacement construction process, and relates to the technical field of railway electrification engineering construction. The synchronous replacement construction process for the passenger-cargo collinear catenary and the contact line has the advantages that the synchronous replacement construction process for the catenary, the contact line and the compensating device optimizes and integrates partial process flows in the traditional construction scheme, the number of parallel operation processes is increased, the utilization rate of the sealing skylight is improved, potential safety hazards such as loads of existing anchor columns along the line direction are effectively avoided, and the times and the duration of high-altitude operation of operators are reduced. The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension paying-off technology', and meets the requirements of replacing a carrier cable seat, a positioning wire clamp, an anchoring compensation device and other construction tasks in the point.

Description

Passenger-cargo collinear carrier cable and contact line synchronous replacement construction process

Technical Field

The invention relates to the technical field of railway electrification engineering construction, in particular to a passenger-cargo collinear carrier cable and contact line synchronous replacement construction process.

Background

At present, the replacement of a single catenary or a single contact wire (called a wire for short) is carried out under the condition of a V-shaped skylight in the line replacement construction of an electrified railway contact network, or the replacement of the catenary and the contact wire is carried out by adopting two operation vehicles respectively, so that the construction of replacing the catenary and the contact wire needs two skylight points or 2 operation vehicles simultaneously, and the suspension adjustment operation is repeatedly carried out, the construction efficiency is low, the utilization rate of the skylight points, personnel and machinery is not high, the cost is greatly increased, and the management risk of construction safety and quality is caused by project delay.

Disclosure of Invention

Therefore, the invention provides a passenger-cargo collinear catenary and contact line synchronous replacement construction process, which aims to solve the problems of low construction efficiency and greatly increased construction cost caused by respectively replacing the catenary and the contact line in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

the passenger-cargo collinear carrier cable and contact line synchronous replacement construction process comprises the following steps:

1) Preparing before operation, testing electricity of a contact net and adding a hanging ground wire, fixing four auxiliary ropes on an anchor ring of a stay wire foundation of an anchor lifting column, wherein tighteners are additionally arranged at the tail ends of the four auxiliary ropes, two auxiliary ropes are horizontally spread to a midspan position in the direction of a conversion column and are used for temporary anchor lifting of a new line, the other two auxiliary ropes are used for replacing a compensation device, and the tail ends of the two auxiliary ropes used for replacing the compensation device are respectively fixed on an existing carrier cable to be removed and an existing contact line to be removed through the tighteners;

2) The new contact line and the new carrier cable are respectively connected with two auxiliary ropes for temporary anchoring of the new line to complete the temporary anchoring of the new line;

3) The new catenary is temporarily suspended on the end head of the flat cantilever, and the new contact line is temporarily suspended on the existing contact line to be dismantled;

synchronously replacing the compensating devices at two sides during the exhibition of a cable, tensioning two auxiliary ropes for replacing the compensating devices, enabling the auxiliary ropes to be in a straightening state, unloading the balance weights on the balance weight rod one by one, loosening and drooping the compensating devices, unloading the compensating devices after opening from the position of an insulator, installing a new compensating device in situ after completely removing the old compensating device, temporarily not installing the balance weight at the anchor-starting side, piling the balance weights on the balance weight rod after replacing the compensating devices at the anchor-falling side, and arranging a compensating pulley block for anchoring on the new compensating device;

4) The new line is formally anchored, the newly laid contact line, the carrier cable and the new compensating device are connected in place, and two auxiliary ropes for temporary anchoring are removed;

5) Dropping the anchor;

6) Removing the old line, and removing the original contact line and the carrier cable;

7) Installing a middle anchor, namely installing a carrier cable and a contact line middle anchor;

8) And adjusting a contact net, namely, slowing the saddle from the central anchor knot to the anchoring direction, installing a positioning device and a hanging string, and adjusting a compensation device.

Further, in the step 2), a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from the anchoring column to be stopped, the new contact line and the new carrier cable are manually pulled to advance to the anchoring column along the direction of the existing contact line to be dismantled, and the new cable is connected with two auxiliary ropes reserved on the road shoulder and used for temporarily anchoring the new line, so that temporary anchoring of the new line is completed;

or in the step 2), the new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column nearest to the anchoring column to stop, the operator respectively passes the new contact line and the new catenary cable above the existing catenary cable needing to be dismantled and the existing contact line needing to be dismantled of the working support, the new contact line and the new catenary cable are manually pulled to advance to the anchoring column along the direction of the existing contact line needing to be dismantled, and the new cable is connected with two auxiliary ropes reserved on the road shoulder and used for temporary anchoring of the new line, so that temporary anchoring of the new line is completed.

Further, in the process of erecting the wire rope in the step 3), the new catenary and the new contact wire are always positioned on the line side of the old wire, and the new catenary is positioned on the line side of the new contact wire, so as to prevent wire stranding.

Further, when the anchor is dropped from the side of the joint opening in the step 5), the catenary cable is hung on the end of the wrist arm far away from the strut in the joint from the position of the central column, a new contact line is hung on the existing contact line to be removed, a worker opens a dropper of another anchor section in the joint before dropping the anchor, and the catenary cable passes through and is installed at the correct position;

and 5) when the joint is crossed and anchored laterally, hanging the new catenary and the new contact line along the direction of the existing contact line to be removed, and installing the pulley block on the new line after the pulley block passes through the upper parts of the existing bearing catenary and the existing bearing contact line respectively by an operator at the midspan position in front of the anchor-dropping column to start anchor-dropping operation.

Furthermore, the anchor dropping operation in the step 5) adopts non-simultaneous anchor dropping of the carrier cable and the contact line, the anchor dropping mode of the carrier cable is firstly carried out and then the anchor dropping mode of the contact line is carried out, and the anchor dropping operation modes of the carrier cable and the contact line are the same; before the anchor is dropped, the line is pre-tightened manually, then the line is tightened by using the pulley block, simultaneously, the tension of the existing catenary cable to be dismantled or the existing contact line to be dismantled is synchronously reduced, the line is tightened after the cable reaches the rated tension and the values a and b of the compensation device at the anchor dropping side meet the requirements, and after the catenary cable is dropped, a new contact line is hung on the new catenary cable;

and simultaneously when the wire is tightened and the anchor is dropped, the anchor lifting side synchronously loads the balance weight, and the compensation rope between the compensation pulleys is kept continuously stressed in the process of installing the balance weight.

Further, the step 6) of removing the old wire comprises the following steps:

601 After the anchor falling is finished, hanging the new contact line on the new catenary and dismantling the pulley hung on the old contact line;

602 Auxiliary pulley block for installation

After the cable is laid out, a broken cable group is arranged at a middle anchor to assist in dismantling an old contact line, two ends of the pulley group are connected with an old carrier cable by using a tightener, a tail rope of the pulley group is arranged on a steel rail and tightened, the pulley group is firmly fixed to wait for a cable breaking command, and the broken cable is carried out by referring to the carrier cable and pulley group installation mode when the old contact cable breaks;

603 And) loosening a chain guide hoist on the auxiliary rope for fixing the old wire, gradually reducing the tension of the old wire, loosening the existing contact wire to be removed, tightening a tail rope of the pulley block on the steel rail by a wire breakage group, breaking the old contact network after a large degree of looseness appears in a span, sequentially breaking other operation groups in sections, safely landing the old contact network, cutting and bundling the old wire in sections according to a certain length by a recovery group, and carrying the old wire outside the line to finish recovery.

Further, the adjusting the compensation device in step 8) comprises the following steps:

when the carrier cable and the contact line reach the design tension and are stable, the difference value of the a value during design and installation is rechecked, the position to be broken is marked, and the a value is adjusted after the new carrier cable and the new contact line are pulled by using the hand-drive block, the tightener and the steel wire rope;

and during b value adjustment, the balance weight is lifted to a height exceeding the design height by 150mm +/-20 mm by using a manual hoist to be connected with a double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

Furthermore, the replacement operation of the carrier cable seat and the positioning wire clamp is also carried out in the preparation work before the operation in the step 1), after the replacement is finished, the existing carrier cable to be removed is temporarily fixed on the flat cantilever, and the existing contact wire and the reversed positioning pipe to be removed are temporarily fixed on the inclined cantilever.

The invention has the following advantages:

the invention optimizes and integrates partial process flows in the traditional construction scheme, increases the number of parallel operation processes, improves the utilization rate of a sealed skylight or the risk of synchronous operation of a plurality of rail vehicles, effectively avoids potential safety hazards such as load of the existing anchor post along the line direction and the like, and reduces the times and the duration of high-altitude operation of operators.

In the prior art, two operation vehicles are mostly adopted for wiring operation, but only one operation vehicle is used in the invention, so that the use efficiency of the vehicle is improved. The compensation device can be taken off when the new line is unfolded, so that time is provided for replacing the compensation device, the new line load can be avoided in the whole paying-off process of the anchor post after the compensation device is taken off, the load of the old line on the anchor post is reduced, the construction safety is improved, and the purposes of optimizing the working procedures, saving the cost, synchronously performing a plurality of operations and the like are achieved.

The pulley block is arranged in the middle of the anchor section, and the old line can safely land on the ground by adopting the transformation ratio characteristic of the pulley block, so that the construction is safer. In addition, when a new carrier cable and a contact line are anchored in the prior art, two trolleys are required to be disassembled and independently run to an anchor column for anchoring, and the process is complicated.

The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension pay-off technology', and meets the requirements of the construction tasks of replacing a carrier cable seat, a positioning wire clamp, an anchoring compensation device and the like in the point.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.

Fig. 1 is a flow chart of a passenger-cargo collinear catenary and contact line synchronous replacement construction process provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view showing temporary anchoring of a new thread in accordance with embodiment 1 of the present invention;

fig. 3 is a schematic view of suspension of a carrier cable and a contact wire in embodiment 1 of the invention;

FIG. 4 is a schematic view of the new line layout in embodiment 1 of the present invention;

FIG. 5 is a schematic view of an articulated cross side drop anchor according to embodiment 1 of the present invention;

in the figure: 1-bracing wire foundation 2-auxiliary rope 3-anchor-lifting column 4-compensating device 5-existing contact wire 6 to be dismantled-existing carrier cable 7 to be dismantled-new contact wire 8-new carrier cable 9-tightener 10-anchor-falling column 11-S hook 12-existing supporting cable 13-existing worker support contact wire.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof are also regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1, the construction process for synchronously replacing the passenger-cargo collinear catenary and the contact line comprises the following steps:

1) Preparation before work

101 Measurement of construction

(1) Selecting a starting point

The anchor post position in the anchor section is generally selected for measurement and the measurement is carried out according to the whole anchor section.

(2) Longitudinal positioning and carrier cable, contact line height and pull-out value measurement

From the starting point, according to the contact net plane layout diagram, the span of the prop is measured along the steel rail by using a steel measuring tape, and the heights and the pull-out values of the carrier cable and the contact line are measured by using a DJJ-8 measuring instrument. The dropper is calculated and pre-configured by software.

(3) Writing mark

Paint dipping with a painting brush is used for marking the position measured along the longitudinal direction of the steel rail.

(4) And finishing one measurement, and finishing the measurement record for storage by a measurer.

102 ) test the electricity to ground

(1) And after receiving a power failure command of the contact network, the equipment management unit tests the electricity of the contact network and additionally hangs a ground wire, and a field construction responsible person supervises and confirms the whole process.

(2) After receiving the order of allowing construction, the on-site construction responsible person can inform the operator to start construction.

103 Mounting auxiliary rope

Four auxiliary ropes 2 with the length of about 30 meters are fixed on an anchor ring of a stay wire foundation 1 of an anchor lifting column 3 through a 3T lever hoist, the auxiliary ropes 2 adopt GJ-50 type steel wire ropes, and the tail end of each auxiliary rope 2 is connected with 1 tightener 9. Two sealing pulleys are respectively hung on two sides of the lower anchor angle steel of the existing messenger wire 6 and the existing contact wire 5 to be dismantled through steel wire sleeves, two auxiliary ropes 2 penetrate through the two sealing pulleys, and a wire tightener 9 at the tail end of each auxiliary rope 2 is fixed on the existing messenger wire 6 and the existing contact wire 5 to be dismantled. The other two auxiliary ropes 2 are horizontally spread to the midspan position towards the direction of the conversion column and are paved on the road shoulder for temporary anchoring of a new line.

104 Replacement of messenger wire seat and positioning wire clamp

And arranging an adjusting operation group to replace the carrier cable seat and the positioning wire clamp while the anchor lifting and dropping preparation works. After finishing, the existing carrier cable 6 to be dismantled is temporarily fixed on the flat cantilever, and the existing contact wire 5 and the reverse positioning pipe to be dismantled are temporarily fixed on the inclined cantilever.

2) Temporary anchor of new line

Referring to fig. 2, when a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from an anchoring column to be stopped, a carrier cable and a contact line are manually pulled to advance to the anchoring column 3 along the direction of the existing contact line to be dismantled, and the new cable is connected with two auxiliary ropes 2 which are reserved on a road shoulder and used for temporarily anchoring the new line, so that the temporary anchoring of the new line is completed;

when a new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column closest to the anchoring column 3 to stop, an operator respectively penetrates a new catenary 8 and a new contact line 7 above the existing catenary 6 and the existing contact line 5 of the working support to be dismantled, and after the new line is manually dragged to the position of the anchoring column 3, the new line is connected with two auxiliary ropes 2 which are reserved on a road shoulder and used for temporarily anchoring the new line, so that the temporary anchoring of the new line is completed.

3) Exhibition of clues

Referring to fig. 3, after the temporary anchor of the new line is finished, the stringing vehicle spreads the new carrier cable 8 and the new contact line 7 according to the running speed of not more than 5 km/h. And a new catenary 8 is temporarily suspended at the end of the flat wrist arm by adopting a plastic sealing pulley at each wrist arm, a new contact wire 7 is suspended on the existing contact wire 5 to be dismantled through the pulley, and the number of the suspended catenary per span is not less than 4.

For the curved section, a new carrier cable 8 can be directly placed above the flat cantilever and fixed by a sealing pulley, so that the saddle is convenient for the ladder truck or the working truck.

Referring to fig. 4, the new messenger 8 and the new contact wire 7 should always be on the line side of the old wire and the new messenger 8 on the line side of the new contact wire 7 during the erection of the cable to prevent twisting.

Synchronously replacing the compensating device of the anchor section during the cable spreading period, wherein the replacement operation modes of the anchor lifting side and the anchor falling side are consistent;

old compensation demolition

After a wire tightener on the auxiliary rope 2 is firmly connected with an existing carrier cable 6 and a contact wire 5 which need to be removed, a person under the rod shakes a chain block at the other end of the auxiliary rope 2, the auxiliary rope 2 is gradually stressed and stops after being in a straightening state, the person on the rod unloads all balance weights on the balance weight rod one by one from top to bottom, the balance weights are stacked beside the support, the compensating device 4 relaxes and droops, and an operator above the balance weight 4 is opened from the position of the insulator and then is tied down by a small rope.

New compensating installation

And after the old compensation device 4 is completely dismounted, the ground coordinators install the new compensation device in situ. Before installation, the values of a and b are determined according to the length of an anchor section and the construction temperature, and the distance between two compensating pulleys is determined by considering the elongation of a new line. (put the construction and prepare the department), adopt 3 copper wire checkposts to fix together two compensation ropes between the side compensation pulley of lifting the anchor, prevent that the cable from spreading and putting and taking place the drunkenness when falling the anchor. The balance weight on the anchor lifting side is not installed temporarily. After the compensation device is replaced on the anchor side, the balance weight is stacked on the weigh beam, and a compensation pulley block for anchoring is arranged on the new compensation device 4.

4) New line formal anchor

And connecting the newly laid new contact wire 7, the new carrier cable 8 and the new compensating device 4 in place, and removing the two auxiliary ropes 2 for temporary anchor lifting.

5) Drop anchor

When the anchor is dropped from the side of the joint opening, the carrier cable is hung from the position of the central column on the end of the wrist arm far away from the support column in the joint, the new contact wire 7 is hung on the existing contact wire 5 to be dismantled, and before the anchor is dropped, a worker opens the dropper of the other anchor section in the joint to pass through and install the carrier cable at the correct position.

Referring to fig. 5, when the joint is anchored at the side in a crossing manner, the new catenary 8 and the contact line are both suspended along the direction of the existing contact line to be dismantled, and at the mid-span position in front of the anchoring post 10, an operator passes through the pulley block from the upper part of the existing work supporting catenary 12 and the upper part of the existing work support contact line 13, and then installs the pulley block on the new line to start the anchoring operation.

The anchor dropping operation specifically comprises the following steps:

501 Anchor dropping group tension line anchor dropping

(1) The anchor falling operation is carried out in a manner that the carrier cable and the contact line fall at the same time, and the carrier cable and the contact line fall in the same manner. Before falling into the anchor, the line is manually pre-tightened, and then the line is tightened by using the pulley block. And simultaneously, the tension of the existing carrier cable 6 to be removed or the existing contact wire 5 to be removed is synchronously reduced. And stopping tightening the cable and manufacturing a terminal when the cable reaches the rated tension and the a value and the b value of the anchor falling side compensation device 4 meet the requirements. After the suspension of the catenary cable is finished, each crane group suspends the new contact line 7 on the new catenary cable 8 by using a long S-hook.

(2) And (4) after the new contact wire 7 is hung upside down, beginning to anchor the contact wire, and performing in a manner of anchoring by referring to a carrier cable.

(3) The centers of two insulator strings on the carrier cable and the contact line are aligned, and the construction allowable deviation is +/-30 mm.

502 Anchor-lifting group-matched anchor-lowering

(1) When the anchor falling group starts to fall in a tight line, the anchor lifting side is required to synchronously load the balance weight to the designed quantity, and the continuous stress of the compensation ropes among the compensation pulleys is required to be kept in the process of mounting the balance weight. The weight is orderly stacked, and the gaps are staggered by 180 degrees.

(2) After the new line formally falls off the anchor, an operator should adjust the values of a and b according to the installation curve and ensure that the weight string can freely move up and down without clamping stagnation when changing with the temperature.

6) Old wire dismantling

601 After the anchoring is finished, the new contact wire 7 is hung on the new catenary 8 by the S-hook 11, and the pulley hung on the existing contact wire 5 to be dismantled is dismantled to prepare for dismantling the old wire.

602 Mounting auxiliary pulley block

After the cable is laid, the cable breaking group is provided with a pulley block at a middle anchor to assist in dismantling an old contact network, two ends of the pulley block are connected with an existing carrier cable 6 needing to be dismantled by using a wire tightener 9, a tail cable of the pulley block is laid on a steel rail and tightened, and the pulley block is fixed firmly to wait for a cable breaking command. And when the old contact line is broken, the mounting mode of the catenary pulley block is referred.

603 The tension of the old wire is gradually reduced, the existing contact wire 5 to be dismantled is loosened, the wire breaking group closes the tail rope of the pulley block on the steel rail, the old contact net in a span is broken after a large sag occurs, other operation groups are sequentially broken in sections, the old contact net safely falls to the ground, the recovery group cuts and ties the old wire in sections according to a certain length, and the old wire is conveyed out of the line to complete recovery.

7) Middle anchor mounting

701 After the anchor drop is completed, the anchor drop leader can inform the anchor centering personnel that the contact wire anchor centering installation can be carried out.

702 The messenger line is placed in the messenger line side channel, the central anchor line is placed in the strut side channel, and pre-twisted protective strips are installed as required. And (3) installing anchor clamps in the carrier cables at positions 200mm away from two sides of a suspension point, penetrating bolts into the field, and fastening the torque 44N.M.

703 A contact wire central anchor line F is installed in a standard position, the anchor line in the contact wire is 500mm from the adjacent hanger, and the fastening torque is 44n.m.

704 The length of the central anchoring auxiliary rope 2 is in accordance with the design requirement, and the construction allowable deviation is 20mm. The height of the lead at the middle anchor is raised by 20-50mm. After the central anchor knot is installed, the anchor lifting group can freely move along with the temperature change after a steel wire clamp fixed on the compensating device 4 is removed.

8) Adjustment of contact net

801 Carrier cable saddle

After the anchor wire clamps in the carrier cables are installed, the ladder vehicle group personnel perform saddle buffering from the central anchoring node to the anchoring direction. And reserving an offset for adjusting the cantilever according to the cantilever installation curve and the numerical requirement of the elongation rate of the cable. (when in operation, the extension amount can be reserved according to L0.7 per mill, wherein L is the distance from the positioning point to the hard anchor or the middle anchor, and the deviation of the adjustment construction allowance of the cantilever deviation value is +/-20 mm).

802 Mounting of positioning devices

(1) And checking whether the compensation balance weight can freely move along with the temperature change.

(2) And two groups of ladder cars closest to the middle anchor are respectively stroked from the middle anchor to the lower anchor direction and are provided with a positioner and a dropper along the contact line surface.

(3) When the locator is installed, the tooth shape of the locator wire clamp is matched with the contact line groove, and the stress surface of the locating wire clamp or the anchor supporting locating clip is in accordance with the technical requirements of products.

(4) And adjusting the position of the positioning wire clamp to ensure that the positioning wire clamp and the positioning pipe are in the same vertical plane with the flat cantilever and the inclined cantilever, and fastening a wire clamp bolt to a standard torque by adopting a torque wrench.

803 Mounting of dropper

(1) After the carrier cable and the contact line are in place, each ladder car set is installed from a suspension point to the midspan according to the mounting position of the hanger marked on the rail web, and the deviation of the ladder car set is adjusted in the midspan. In order to reduce the suspension string deflection phenomenon caused by the change of the sag of the carrier cable before and after loading, 3S hooks are temporarily installed at the positions 10 m away from the suspension point and in the midspan position respectively, wherein 950mm multiplied by 2S hooks and 650mm multiplied by 1S hooks are used for simulating the effect after the suspension string is installed and reducing the deviation after the suspension string is installed.

(2) The bolt of the contact wire dropper clamp in the linear section penetrates from the field side to the line side, the bolt of the contact wire dropper clamp in the curved section penetrates to the outer side of the curve, the mounting directions of the bolt of the carrier cable dropper clamp and the bolt of the contact wire dropper clamp are opposite, and the clamp fastening torque is 25N.M. The current-carrying ring of the contact wire dropper wire clamp is consistent with the advancing direction of the train. The installation direction of the U-shaped clamp is the direction of the coming vehicle of the carrier cable dropper wire clamp.

(3) The hanger is vertically installed, the allowable deviation of the installation position of the hanger is +/-20 mm, a current-carrying ring of the hanger is fixed on the tail side of a bolt of a hanger wire clamp and cannot intersect with a hanger wire, and a connecting terminal and a contact wire form an included angle of 45 degrees. The long piece of the stop washer of the contact wire dropper clamp is tightly clamped with the clamp body, and the two short pieces are tightly clamped with the nut.

804 Electrical connection mounting

(1) The joints are electrically connected and arranged on two sides of the No. 2 dropper of the working support between the anchor column and the conversion column, the distances between the joints and the left and right sides of the dropper are respectively 400mm, and construction allowable deviation is +/-50 mm. The length of the electrical connection line should take into account the amount of displacement due to temperature changes.

(2) Before installation, the relative positions of the two electric connecting wire clamps are calculated according to the field temperature, the installation form of the electric connecting wire clamps is determined according to the structure height of the installation position, and the electric connecting wire clamps are S-shaped when the structure height is larger than 1 meter and are C-shaped when the structure height is smaller than 1 meter.

(3) When the cable is installed, the electric connecting wires of the carrier cable and the contact wire on the same anchor section are clamped on the same vertical plane, the electric connecting parts of the electric connecting wire clamp, the carrier cable, the contact wire and the like are ground, dedusted and coated with electric compound grease, and the S-shaped or C-shaped radian of the electric connecting wire clamp, the carrier cable, the contact wire and the like faces the incoming direction. After installation, the electric connection wire is ensured to have no phenomena of strand scattering and strand breaking, and the height of the contact wire at the wire clamp is equal to that of the adjacent hanger.

When the carrier cable and the contact line reach the designed tension and are stable, the difference value between the a value design and the installation is rechecked, the position to be broken is marked, and the a value is adjusted after the hand-operated hoist, the tightener and the steel wire rope are used for pulling the new carrier cable 8 and the new contact line 7.

And during b value adjustment, the balance weight is stringed and lifted to a height exceeding the design height by about 150mm by using the hand hoist to be connected with the double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

805 ) adjustment of the compensation means 4

(1) When the carrier cable and the contact wire reach the designed tension and are stable, the difference value between the a value design and the installation is rechecked, the position to be broken is marked, and the a value is adjusted after the new contact wire 7 of the new carrier cable 8 is pulled by using the hand-drive block, the tightener and the steel wire rope.

(2) And during b value adjustment, a balance weight is stringed and lifted to a height which exceeds the design height by about 150mm by using a hand hoist to be connected with the double-lug wedge-shaped wire clamp at the end of the compensation rope, and the compensation rope is tightened after the position is adjusted, so that b value adjustment is completed. In the adjusting process, the compensation rope needs to be prevented from rotating along the reverse stranding direction of the rope under the action of gravity of the weight string, so that the compensation rope is prevented from stranding.

(3) The distance (a value) of the pulley is adjusted according to the temperature of the cable and the length of the corresponding half anchor section. The installation height (b value) of the weight of the guide wire from the ground is in accordance with a designed installation curve, the construction allowable deviation is 0-200 mm, and the distance from the weight of the guide wire to the ground is not less than 200mm under any condition.

9) Horizontal pushing inspection and acceptance

901 The contact net parts are installed according to the instruction book of product installation and use. After the adjustment is completed, flat-pushing acceptance inspection is carried out according to the anchor sections, 4 acceptance groups are arranged in each anchor section, the acceptance groups are respectively arranged from the anchor section joints and the central anchor section, construction unit personnel and 1 person in a take-over unit are respectively arranged in each group of ladder cars, and flat-pushing inspection and acceptance inspection are carried out on the installation correctness of positioning wire clamps, middle anchor wire clamps, various bolts, nuts, locking plates, split pins and the like in the construction sections and the torque fastening condition according to the railway electric power and traction power supply engineering construction quality acceptance standard and the power supply section control standard, so that the reliable electrical connection and the good bow net relationship are ensured.

902 The height of the contact line and the pull-out value of the positioning point are required to meet the design requirements, the construction allowable deviation is +/-30 mm, and the requirements that the common section is not more than 2 per thousand and the difficult section is not more than 4 per thousand are met when the height of the suspension point of the working support of the contact line is changed.

10 End of

And after the operation is finished, cleaning construction machines, road materials and the like, cleaning the finished materials, carrying out safety inspection on the line, filling construction records by a construction responsible person, and signing on a record table by an installer.

And returning to a parking place in the stringing vehicle-mounted locking point, monitoring that the first line passes through when the line is opened, ensuring that the equipment is normal, and completely withdrawing the constructors from the site.

The invention optimizes and integrates partial process flows in the traditional construction scheme, increases the number of parallel operation processes, improves the utilization rate of the sealed skylight, effectively avoids potential safety hazards such as loads of the existing anchor posts along the direction of a line and the like, and reduces the times and the time of high-altitude operation of operators.

The invention is suitable for the construction of simultaneously replacing the carrier cable and the contact wire in the 210-minute blocking power failure point of the passenger-cargo collinear electrification line by adopting a 'small tension paying-off technology', and meets the requirements of the construction tasks of replacing a carrier cable seat, a positioning wire clamp, a lower anchor compensation device 4 and the like in the point.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (5)

1. A passenger-cargo collinear carrier cable and contact line synchronous replacement construction process is characterized in that: the construction process for synchronously replacing the carrier cable and the contact line of the passenger-cargo collinear carrier cable comprises the following steps:

1) The method comprises the steps of preparing before operation, testing electricity of a contact network and adding a hanging ground wire, fixing four auxiliary ropes (2) on an anchor ring of a stay wire foundation (1) of an anchor lifting column (3), wherein the tail ends of the four auxiliary ropes (2) are additionally provided with tighteners, two auxiliary ropes (2) are horizontally spread to a midspan position in the direction of a conversion column and used for temporary anchor lifting of a new line, the other two auxiliary ropes (2) are used for replacing a compensation device (4), and the tail ends of the two auxiliary ropes (2) used for replacing the compensation device (4) are respectively fixed on an existing carrier cable (6) needing to be removed and an existing contact wire (5) needing to be removed through the tighteners (9);

2) The new line is temporarily anchored, and the new contact line (7) and the new carrier cable (8) are respectively connected with two auxiliary ropes (2) for temporarily anchoring the new line to complete the temporary anchoring of the new line;

3) The method comprises the following steps of (1) unfolding a cable, temporarily hanging a new carrier cable (8) on the end head of a flat wrist arm, and temporarily hanging a new contact wire (7) on an existing contact wire (5) to be dismantled;

synchronously replacing the compensating devices (4) at two sides during the exhibition of the cable, tensioning two auxiliary ropes (2) for replacing the compensating devices (4), enabling the auxiliary ropes (2) to be in a straightening state, unloading the balance weight on the balance weight rod block by block, loosening and drooping the compensating devices (4), opening and then unloading the compensating devices (4) from the insulator position, completely detaching the old compensating devices (4), installing the new compensating device (4) in situ, temporarily not installing the balance weight at the anchor lifting side, piling the balance weight on the balance weight rod after the replacement of the compensating devices (4) at the anchor falling side is completed, and arranging a compensating pulley block for anchoring on the new compensating device (4);

4) The new line is formally anchored, the newly laid contact line, the carrier cable and the new compensating device (4) are connected in place, and two auxiliary ropes (2) for temporary anchoring are removed;

5) Dropping the anchor;

when the anchor is dropped from the side of the opening of the joint in the step 5), the carrier cable is hung on the end of the wrist arm far away from the strut in the joint from the position of the central column, a new contact wire (7) is hung on the existing contact wire (5) to be dismantled, a worker opens a dropper of another anchor section in the joint before the anchor is dropped, and the carrier cable penetrates through and is installed at the correct position;

when the joint is subjected to cross side anchoring in the step 5), a new carrier cable (8) and a new contact line (7) are hung along the direction of the existing contact line (5) to be dismantled, and at the midspan position in front of an anchoring post (10), an operator passes through the pulley block from the upper parts of the existing bearing force cable (12) and the existing supporting contact line (13), installs the pulley block on the new line and starts anchoring operation;

in the step 5), non-simultaneous anchor dropping is carried out on the carrier cable and the contact line, the carrier cable is firstly dropped and then the contact line is dropped, and the anchor dropping operation mode of the carrier cable and the contact line is the same; before the anchor is dropped, the line is manually pre-tightened, then the line is tightened by using the pulley block, simultaneously, the tension of the existing catenary (6) to be dismantled or the tension of the existing contact line (5) to be dismantled is synchronously reduced, the line is tightened after the line reaches the rated tension and the a value and the b value of the anchor dropping side compensation device (4) meet the requirements, and after the catenary is dropped, a new contact line (7) is hung on a new catenary (8);

when the tightening wire falls into the anchor, the anchor lifting side synchronously loads the balance weight, and the compensation rope between the compensation pulleys is kept continuously stressed in the process of installing the balance weight;

6) Removing the old line, and removing the original contact line and the carrier cable;

step 6) old line dismantling comprises the following steps:

601 After the anchor is dropped, hanging the new contact line (7) on a new carrier cable (8), and dismantling the pulley hung on the old contact line;

602 ) and auxiliary pulley block for installation

After the cable is laid out, a cable breaking group is arranged at a middle anchor to assist in dismantling an old contact network, two ends of the pulley block are connected with an old carrier cable through a wire tightener (9), a tail rope of the pulley block is pressed on a steel rail and tightened, the pulley block is firmly fixed to wait for a cable breaking command, and the process is carried out according to the carrier cable pulley block installation mode when the old contact cable breaks;

603 Loosening a chain guide hoist on the fixed old wire auxiliary rope (2), gradually reducing the tension of the old wire to loosen the existing contact wire to be dismantled, tightening a pulley block tail rope on a steel rail by a wire breakage group, breaking the old contact net in a span after a large sag occurs, sequentially breaking other operation groups in sections, safely landing the old contact net, cutting and bundling the old wire in sections according to a certain length by a recovery group, and carrying the old wire out of the line to finish recovery;

7) Mounting a middle anchor, namely mounting a carrier cable and the contact line middle anchor;

8) And adjusting a contact net, namely, slowing the saddle from the central anchor knot to the anchoring direction, installing a positioning device and a hanging string, and adjusting a compensation device (4).

2. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: in the step 2), a new line is selected to be anchored at the opening side, the stringing vehicle runs to a position of a conversion column far away from an anchoring column to be stopped, a new contact line (7) and a new carrier cable (8) are manually pulled to advance to the anchoring column (3) along the direction of an existing contact line (5) to be dismantled, the new cable is connected with two auxiliary ropes (2) which are reserved on a road shoulder and used for temporarily anchoring the new line, and the temporary anchoring of the new line is completed;

or in the step 2), a new line is selected to be anchored at the cross side, the stringing vehicle runs to the position of the conversion column nearest to the anchoring column to stop, an operator respectively penetrates the new contact line (7) and the new carrier cable (8) above the existing carrier cable (6) to be dismantled and the existing contact line (5) to be dismantled of the working support, the new contact line (7) and the new carrier cable (8) are manually pulled to advance to the anchoring column (3) along the direction of the existing contact line (5) to be dismantled, and the new cable is connected with two auxiliary ropes (2) which are reserved on a road shoulder and used for temporary anchoring of the new line, so that temporary anchoring of the new line is completed.

3. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: and 3) in the process of erecting the wire rope, the new carrier cable (8) and the contact wire are always positioned at the line side of the old wire, and the new carrier cable (8) is positioned at the line side of the new contact wire (7) to prevent wire stranding.

4. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: the step 8) of adjusting the compensation device (4) comprises the following steps:

when the carrier cable and the contact line reach the designed tension and are stable, the difference value of the a value during design and installation is rechecked and marked at the position to be broken, and the a value is adjusted after the new carrier cable (8) and the new contact line (7) are pulled by a hand-operated block, a tightener (9) and a steel wire rope;

and during b value adjustment, the balance weight is lifted to a height exceeding the design height by 150mm by using a manual hoist to be connected with the double-lug wedge wire clamp at the end part of the compensation rope, and the compensation rope is tightened after the position is adjusted to complete b value adjustment.

5. The passenger-cargo collinear catenary and contact line synchronous replacement construction process as claimed in claim 1, wherein: step 1), replacing the carrier cable seat and the positioning wire clamp in the preparation work before the operation, temporarily fixing the existing carrier cable (6) to be removed on the flat cantilever, and temporarily fixing the existing contact wire (5) and the anti-positioning pipe to be removed on the inclined cantilever.

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