CN113602156B - 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method - Google Patents
42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method Download PDFInfo
- Publication number
- CN113602156B CN113602156B CN202110927768.3A CN202110927768A CN113602156B CN 113602156 B CN113602156 B CN 113602156B CN 202110927768 A CN202110927768 A CN 202110927768A CN 113602156 B CN113602156 B CN 113602156B
- Authority
- CN
- China
- Prior art keywords
- contact
- line
- turnout
- suspension
- dropper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B60M1/28—Manufacturing or repairing trolley lines
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention provides a 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method, which comprises the following steps: changing a positive feeder; step two: unloading and adjusting tension; step three: newly erecting and reversely connecting; step four: the auxiliary line 1 is connected with the connecting line in an inverted mode; step five: and adjusting the insulation joint. The No. 42 turnout junction provided by the invention meets the requirement of realizing electrical isolation of two positive lines, and improves the safety and reliability of operation and maintenance.
Description
Technical Field
The invention belongs to the technical field of contact network transformation construction methods, and particularly relates to a 42# turnout joint-free turnout-changing type electric subsection arrangement construction method for a contact network.
Background
At present, high-speed turnouts are introduced when railways with the speed per hour of 250km/h and the speed per hour of 350km/h are newly built in China, and the high-speed turnouts are used for meeting the requirements of station entrance and exit and meeting the requirement of access between main lines. And the smooth passing of the train from the lateral line to the main line and between the main line and the main line is completed by utilizing the high-speed turnout. Meanwhile, the contact of the bow net is tested well; at present, the contact net at the 42# turnout position adopts a non-cross-line turnout arrangement mode with an auxiliary suspension, the arrangement mode can ensure that when a train passes through the turnout, the pantograph smoothly gets current, but the electrical isolation of two lines cannot be met, namely, the power supply of the two lines connected by the 42# turnout is synchronous, a power failure fault occurs on one line, the operation of the other line can also be influenced, the non-cross-line turnout arrangement mode with the auxiliary suspension at the 42# turnout position at present is shown in figure 1, the contact net at two groups of 42# turnout positions adopts 2 auxiliary lines and 1 connecting line to be connected with a main line, and the electrical segmentation of the two main lines cannot be realized at the 42# turnout position. In the existing research, a patent with the application number of 202010385007.5 discloses a 42# turnout junction contact network non-crossing arrangement construction method, the existing 42# turnout junction contact network non-crossing arrangement mode cannot meet the requirement of a turnout location to realize electrical sectioning, and when a contact network fails, line contact networks connected with the 42# turnout are all powered off, so that the operation of different line trains is influenced. Compared with the arrangement of no cross point of contact networks at 42# turnout, the arrangement of no cross point of contact networks at 18# turnout cannot be transformed into an electric subsection form, the requirement of high-speed passing and current taking of trains cannot be met, the arrangement method is relatively simple, and the technology is relatively mature.
In summary, a construction method capable of meeting the requirement of realizing electrical isolation of two main lines needs to be developed, and the safety and reliability of operation and maintenance are improved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a 42# turnout junction contact network non-crossing turnout joint type electric subsection arrangement construction method, which meets the requirement of realizing electric isolation of two positive lines and improves the safety and reliability of operation and maintenance.
The technical scheme adopted by the invention is as follows: a42 # turnout junction contact net non-cross turnout joint type electric subsection arrangement construction method comprises the following steps,
the method comprises the following steps: changing a positive feeder;
step two: unloading and adjusting tension;
step three: erecting and reversely connecting a new guide;
step four: the auxiliary line 1 is reversely connected with the connecting line;
step five: adjusting an insulation joint;
in the first step, the method comprises the following steps,
1-1 marker measurement: measuring the positive feeder shoulder frame by using a laser measuring instrument, and marking the position which does not meet the requirement of the insulation distance;
1-2 shoulder rack assembly: assembling the positive feeder shoulder frame connecting part at the mark;
1-3, dismantling an old shoulder frame: removing the old shoulder rack at the marked position and conveying the shoulder rack to the ground;
1-4, mounting a new shoulder frame: and installing a new shoulder frame at the position where the old shoulder frame is removed.
Further, the second step comprises the following steps,
2-1, dismantling part of balance weight: the tension of a carrier cable and a contact wire reaches 15KN by dismantling the weight, and the guide height and the pull-out value of a locomotive pantograph in an equal-height area of a contact net are measured by a laser measuring instrument before dismantling and marked;
2-2, dismantling the existing integral dropper: 2-3, installing an adjustable hanging string: adjusting the section formed after the removal of the step 2-1 and the step 2-2 and subjected to the unloading of the tension by using an adjustable dropper, and recovering to the original position of the equal-height area;
and 2-4, adjusting the contact suspension to restore the height guiding and pulling values of the equal-height area of the contact net to the state before the balance weight is removed. Further, the third step comprises the following steps,
3-1, erecting a new carrier cable: the existing channel is utilized to carry out the installation of the lower anchor base and the erection of a new carrier cable at the anchor-lifting position of the connecting line, and on the existing cantilever, the newly erected anchor section carrier cable is fixed on the flat cantilever by a carrier cable seat; 3-2, reversely connecting a new carrier cable: disconnecting the auxiliary line 2 at the position 5m on one side of the E0E1 hanging column, inversely connecting the auxiliary line with the newly erected carrier cable, installing insulation after inversely connecting, and installing equipotential electrical connection;
3-3, erecting a new contact line: erecting a new contact line at the anchor-lifting position of the connecting line, and fixing the newly erected anchor section contact line on the inclined cantilever by using an anchor support clip on the existing cantilever;
3-4, connecting a new contact line in an inverted manner;
3-5 suspension adjustment: and the height guiding and pulling values of the equal-height area of the contact net are restored to the state before the balance weight is removed. Further, the fourth step comprises the following steps,
4-1, reversely connecting the old carrier cables: before construction, the newly erected bearing guide is respectively guided to the wrist arm to be replaced with the original connecting line; 4-2, reverse connection of old contact lines: connecting the auxiliary line 1 contact line and the existing connecting line contact line to one block;
4-3, dismantling the hanging columns: dismantling the F0F1 middle suspension post marked in advance;
4-4 mounting electric connection: installing equipotential electrical connection at the inverted connection position by using a fastening wire clamp;
4-5 suspension adjustment: the contact suspension is adjusted.
Further, the fifth step includes the following steps,
5-1 replacement of the unsatisfactory wrist arm and positioning device: adjusting the contact suspension in the whole construction section, marking the position which does not meet the requirement through measurement, and removing the corresponding positioning device; dismantling the wristarm which does not meet the insulation condition, and installing the wristarm which meets the requirement;
5-2, wrist and arm adjustment: the relation and adjustment requirement of the non-working branch contact line at the conversion column and the working branch positioning pipe are that the non-working branch contact line at the conversion column is positioned above the working branch positioning pipe, and the gap between the non-working branch contact line and the working branch positioning pipe is not less than 50mm; the lifting amount of the non-working support contact line takes the stress of a dropper into consideration, and simultaneously the horizontal distance between the two contact lines is ensured to be 500mm, and the allowable error is +/-20 mm; the insulation distance between the working supporting cable and the inclined cantilever of the non-working support and the inclined suspension wire of the positioning pipe at the central column meets the requirement that the insulation distance is more than or equal to 500mm, and the allowable deviation is 0 to 50mm; the error of the height of the contact line of the suspension point is +/-20 mm, and the error of the structure height is +/-100 mm;
5-3, positioning adjustment: the offset direction of the locator is consistent with that of the wrist arm, the offset values are equal, and the locator and the wrist arm are always in the same plane;
5-4, replacing the hanging strings: the adjustable dropper is changed into an integral dropper;
5-5 suspension adjustment: and the height guiding and pulling values of the equal-height area of the contact net are restored to the state before the balance weight is removed. Further, 5-4 dropper replacement is to prefabricate the length of the integral dropper on site according to the length of the adjustable dropper, compare the prefabricate dropper with the adjustable dropper, remove the adjustable dropper with a torque wrench after the confirmation of no error, replace the integral dropper in place, measure the contact suspension after the adjustment with a laser measuring instrument, and record the contact suspension.
The invention has the beneficial effects that:
the invention discloses a 42# turnout junction contact system non-crossing turnout joint type electric subsection arrangement construction method through the steps of one to five, the construction method is comprehensive construction, the contents of carrier cable and contact line erection, dropper replacement, cable reverse connection, high-speed non-crossing turnout adjustment and the like need to be carried out simultaneously, and the method can overcome the difficulties of time tightness, large adjustment amount, large safety pressure, small adjustment space, no identifiable experience and the like in the construction process. By implementing the invention, the power supply safety and reliability of each line are enhanced, a good operation effect is achieved, and the invention is proposed to be popularized and applied in the transformation without cross line turnouts in the high-speed railway tunnel.
Drawings
FIG. 1 is a schematic structural diagram of a cross-point-free turnout arrangement with an auxiliary suspension at a 42# turnout in the present stage of the invention;
FIG. 2 is a schematic diagram illustrating the effect of step three 3-3 of the present invention;
FIG. 3 is a schematic diagram illustrating the effect of the present invention after step four;
FIG. 4 is a schematic diagram illustrating the effect of the present invention after step five is not completed;
FIG. 5 is a schematic diagram illustrating the effect of the present invention after completion of step five;
FIG. 6 is a schematic flow diagram of the present invention.
Detailed Description
In order to clearly understand the technical scheme of the invention, the invention is further explained with reference to the attached drawings.
Example 1
Referring to fig. 1-6, the invention provides a 42# turnout junction contact net crossover-free turnout joint-changing type electric sectional arrangement construction method, which comprises the following steps, specifically, see step one to step five, fig. 6 discloses a finishing step flow of the invention, after the engineering starts, the steps of positive feeder line changing, tension unloading and adjusting, new guide bearing erection and reverse connection, auxiliary line 1 and connecting line reverse connection and insulation joint adjusting are sequentially carried out, after the steps are completely executed, when the construction steps are judged to be completed, the engineering is finished, otherwise, the steps are carried out according to the sequence of the engineering steps. The concrete description is as follows.
As can be seen from fig. 1, there are two auxiliary lines, SD1 to SD17 are taken as auxiliary lines 1 in fig. 1 as an example to satisfy the normal current draw of the train when the train transits from the head line to the siding line, and SD11 to SD28 are taken as auxiliary lines 2 to satisfy the normal current draw of the train when the train transits from the siding line to the other head line.
The method comprises the following steps: the positive feed line is shifted.
The first step comprises the following steps, specifically 1-1 to 1-4.
Because the space is limited in the tunnel, the distance of the positive feeder to the contact net is short, and the insulation distance required by an insulation joint cannot be met, the positive feeder in the section needs to be changed and the shoulder frame needs to be replaced.
The judgment standard that does not meet the requirement of the insulation distance is as follows: the distance between the charged body of the contact net and the non-charged body of the equipment is less than or equal to 500mm.
1-1 marker measurement: and according to the reconstruction requirement of the installation diagram, measuring the positive feeder shoulder frame by using a laser measuring instrument, and marking the position which does not meet the requirement of the insulation distance.
1-2 shoulder rack assembly: assembling the positive feeder shoulder frame connecting part at the mark;
1-3, dismantling an old shoulder frame: arranging one person to the installation position, sleeving a nylon sleeve, hanging a pulley, threading a lifting rope, binding an old shoulder frame and a shaking rope at the position needing to be marked by an upper person, and conveying the shoulder frame to the ground; personnel on the rod cooperate to remove the bolt, and ground personnel slowly release the rope to convey the shoulder frame to the ground; then, the personnel on the ground tie the newly replaced shoulder frame and the shaking rope, the personnel on the rod are matched, and the personnel on the ground pull the rope to lift the shoulder frame to the installation position; the upper personnel hold up the shoulder frame, and two people are in face-to-face fit along the line direction, install the shoulder frame together according to the measurement height, and detect connecting bolt fastening torque and reach the standard with the moment spanner. And after the installation, the next shoulder frame is installed.
1-4, mounting a new shoulder frame: and installing a new shoulder frame at the position where the old shoulder frame is removed.
Step two: and (4) unloading and adjusting the tension.
The second step comprises the following steps, specifically 2-1 to 2-4.
2-1, dismantling a part of weight: the tension of the carrier cable and the contact wire can reach 15KN by dismantling the weight. After the weight is unloaded, the original state of the contact net is required to be restored through adjustment, so before the weight is removed, the guide height and the pull-out value of the locomotive pantograph at the position of the contact net and the like are measured by a laser measuring instrument, the laser measuring instrument is placed on a steel rail, after the position is found, the number of the locomotive pantograph is clearly marked on a rail plate on the edge of the steel rail where the measuring instrument is placed by chalk, and then the locomotive is unloaded.
In this embodiment, in order to remove the auxiliary line 1, the auxiliary line 2, and the balance weights of the tie line compensating device, 33kg of balance weight 2 blocks, 44kg of balance weight 2 blocks, and 50kg of balance weight 8 blocks were removed altogether at each place.
2-2, dismantling the existing integral dropper: 2-3, installing an adjustable hanging string: adjusting the section formed after the removal of the step 2-1 and the step 2-2 and subjected to the unloading of the tension by using an adjustable dropper, and recovering to the original position of the equal-height area;
the hanger is a vertical line part connected between the carrier cable and the contact line on the contact net, the distance between the carrier cable and the contact line changes after the tension is unloaded, the length of the original hanger is certain, the requirement of the straightness of the contact line cannot be met, and the hanger needs to be replaced by an adjustable hanger for adjustment.
In this embodiment, as shown in fig. 1, the tension relief section is formed by the auxiliary line 1 anchoring position and the auxiliary line 2 anchoring position, i.e. the numbers of the upper boom rods: SD1-SD28 sectors.
And 2-4, adjusting the contact suspension to restore the height guiding and pulling values of the equal-height area of the contact net to the state before the balance weight is removed. The cantilever adjustment is mainly performed on the position where the height of the contact wire is not proper and the pull-out value is not proper (the cantilever is lifted, or the cantilever is lowered, or the cantilever is lifted for positioning or the cantilever is lowered for positioning), and on the other hand, the straightness of the contact wire is adjusted by using the suspension string, so that the smooth thread is ensured.
The invention is applied to No. 42 turnout of Hangzhou south line institute, in the embodiment, the tension of the contact net compensation device at the No. 42 turnout of the original Hangzhou south line institute is known to be 20KN of a catenary and 26KN of a contact line; before the tension is unloaded, the guide height and the pull-out value of the locomotive pantograph in the equal height area of a contact net are measured by a laser measuring instrument and marked, after the tension is unloaded, the tension of the compensating device is 15KN of a carrier cable and 15KN of a contact line, an existing integral dropper is removed, the section after the tension is unloaded is adjusted by the adjustable dropper, and the original equal height area position is recovered.
Step three: and (5) newly erecting and reversely connecting.
The third step comprises the following steps, which are specifically shown in 3-1-3-5.
3-1, erecting a new carrier cable: mounting a lower anchor base and erecting a new catenary by utilizing an existing channel at the anchor-lifting position of a connecting line, and fixing a newly erected anchor section catenary on the flat cantilever (sd 5, sd8, sd11 and sd14 in the embodiment) by utilizing a catenary seat;
the specific process is as follows: firstly, a wire releasing bracket is well supported on an automobile, a wire coil is hoisted on the wire releasing bracket by adopting an automobile crane, a wire spool penetrates into the wire coil, and the wire coil is hoisted on the wire coil bracket; fixing a paying-off support by using an iron wire, sleeving the iron wire on a cantilever, hanging a pulley, and hanging the pulleys on the hanging columns from the falling anchor to the anchor-lifting column by adopting the same method. Installing a terminal anchoring wire clamp at a proper position near an anchoring position (an anchoring position of an original connecting line); the upper personnel connect the terminal anchor with the lower anchor connecting piece; the carrier cable is spread from the side direction of the wire coil to the anchoring direction, when the carrier cable is pulled to pass through the L/2 span, the carrier cable is lifted by a palm rope, the carrier cable is placed in an aluminum pulley, and the carrier cable is pulled to the anchoring position by adopting the same method.
3-2, reversely connecting a new carrier cable: and (3) disconnecting the auxiliary line 2 at the position 5m on the left side of the SD17 suspension column, inversely connecting the auxiliary line with the newly erected catenary cable, installing insulation after the inverse connection, and installing equipotential electrical connection. In this embodiment, as shown in fig. 2, the newly erected catenary cable and the current auxiliary line 2 are connected together by 5m from the position of the SD17 support to the direction of the SD16 support, and the two lines are connected by an insulator, which is the process of mounting insulation, and the electrical connection is mounted to ensure the conduction of the circuits on the two sides.
3-3, erecting a new contact line: the contact line erecting method is the same as the carrier cable erecting method, only the contact line is fixed on the oblique cantilever by an anchor clip, and the specific process is as follows: erecting a new contact line at the anchor-lifting position of the connecting line, and fixing the newly erected anchor section contact line on the inclined cantilever by using an anchor support clip on the existing cantilever; the effect diagram after the erection is shown in fig. 2, and it can be seen from the diagram that after the new guide is erected, the anchor falling position of the auxiliary thread 2 is changed from the SD13 corresponding to the anchor wall to the link line anchor falling position, i.e., the SD4 position, so as to create conditions for later stage articulated segment change. 3-4 reverse connecting new contact line: disconnecting the auxiliary line 2 at the position 5m from the left side of the SD17 hoisting column, reversely connecting the auxiliary line with the newly erected contact line, installing insulation after reversely connecting, and installing equipotential connection;
3-5 suspension adjustment.
Step four: the auxiliary line 1 is connected with the tie line in a reverse way.
In the fourth step, the method comprises the following steps,
4-1, reversely connecting the old carrier cables: and disconnecting the auxiliary line 1 and the connecting line at the position 5m on the right side of the sd13 suspension column, and reversely connecting the two lines. Before construction, the newly erected bearing guide is respectively guided to the wrists (sd 5, sd8, sd11, sd 14) to be replaced with the original connecting line, and the original connecting line bearing guide is temporarily and firmly fixed on the wrists by phi 1.6 iron wires. The procedure of 4-1 is further illustrated: before reverse connection, a newly erected carrier cable is changed to a carrier cable seat where a present connecting line is located, the connecting line carrier cable is changed to a temporarily installed carrier cable seat, the newly erected connecting line is fixed by a locator cable clamp, and the connecting line is fixed by a temporarily installed anchor support clamp; after the step is finished, 5m is measured from the position of the SD13 support column to the direction of the SD14 support column, the catenary messenger wire of the auxiliary wire 1 and the catenary messenger wire of the current interconnection line are connected into a whole, two wires are connected by an insulator, namely the installation insulation, and the installation electric connection is to ensure the conduction of circuits at two sides.
4-2 reverse connection of old contact lines: the auxiliary line 1 contact line and the existing tie line contact line are connected to one another. And after the auxiliary line 1 and the connecting line are reversely connected, removing the temporarily fixed connecting line.
The process of 4-2 is further explained: the contact wire of the auxiliary wire 1 and the contact wire of the current connecting wire are connected together by an insulator, namely the installation insulation, and the installation electric connection is to ensure the conduction of circuits at two sides, wherein the distance from the position of the SD13 strut to the direction of the SD14 strut is measured by 5 m.
It should be noted that the old references in 4-1 and 4-2 refer to the catenary and contact lines of the auxiliary line 1 and the connecting line before modification.
4-3, dismantling the hanging columns: and removing the F0F1 middle suspension post marked in advance.
The concrete process is that a pulley is fixed in a channel of the tunnel top by a T bolt and an auxiliary tool, an upper constructor penetrates a large rope to penetrate through the pulley and is tied on a cantilever, upper and lower base bolts of the cantilever are loosened, a lower constructor tightens the large rope and slowly puts down the cantilever, and similarly, the upper constructor tightens the large rope to tie a davit, loosens the T-shaped bolt in the channel, and the lower constructor tightens the large rope to slowly put down the dismantled davit.
In the implementation process of the invention, the F0F1 middle suspension post is determined after field investigation. In the embodiment, as shown in fig. 4, F0F1 is SD14/SD15/SD16, and SD15 is the middle suspension post.
4-4 mounting electric connection: installing equipotential electrical connection at the inverted connection position by using a fastening wire clamp;
4-5 suspension adjustment: the contact suspension in the operation section is adjusted, the adjustment result is shown in fig. 3, and as can be seen from fig. 4, after the reverse connection is completed, the basic form of the joint is transformed, the operation of the train is not affected, the purpose of additionally installing the electric connection is to supply power to the newly-built line by the original line before the power is not supplied, and when the power is supplied, the electric connection is applied for removal, so that the flexibility of the articulated power supply of the contact network is embodied.
Step five: and adjusting the insulation joint.
The fifth step comprises the following steps, specifically seen in 5-1-5.
5-1 after all the procedures are finished, the contact suspension in the whole construction section (sd 1-sd 29) is adjusted, and part of the wrists cannot meet the insulation condition and needs to be replaced, so that the wrists and the positioning devices which do not meet the requirements are replaced firstly, and the method comprises the following specific steps: adjusting the contact suspension in the whole construction section, marking the position which does not meet the requirement through measurement, and dismantling the corresponding positioning device; and (5) dismantling the cantilever which does not meet the insulation condition, and installing the cantilever which meets the requirement. By measuring the marking of the unsatisfactory position, the unsatisfactory positioning device is first removed.
5-1, the method for removing the positioning device comprises the following steps,
a-1, temporarily fixing a catenary contact wire through an existing channel to ensure the sag;
a-2, mounting a fixed pulley by using an existing channel, and simultaneously, penetrating a coir rope through the pulley to fix a positioning device;
a-3, fixing one end of the coir rope on a positioning device, and pulling and tightening the other end by a person at the lower part;
a-4, dismantling the positioning device;
a-5, the person at the lower part slowly puts the positioning device on the ground through the fixed pulley and the coir rope.
The positioning device comprises a positioning pipe, a positioner, a positioning support, a positioning wire clamp and an electric connecting wire.
The model of the locator and the installation of the model given by the strict execution calculation group are installed; and meanwhile, whether the stress surface of the positioning wire clamp is correct or not is noticed.
The method for detaching the cantilever which does not meet the insulation condition in the step 5-1 comprises the following steps:
b-1, fixing one end of the coir rope on a cantilever, and removing the fixed cantilever and the rod porcelain connection U-shaped bolt;
b-2, the upper personnel are matched with each other to remove the wrist, and the lower personnel slowly place the wrist positioning device on the ground through the fixed pulley and the coir rope.
5-1, the method for installing the satisfactory wrist arm comprises the following steps:
c-1, determining that the serial number of the wrist arm is consistent with the installation place; two persons go to the upper part, one person goes to the upper cantilever base, the other person goes to the lower cantilever base, the sleeve and the pulley are hung by the person above, and meanwhile, the lower person assembles the flat cantilever and the inclined cantilever which are prepared in advance;
c-2, pulling up the wrist arm by the personnel at the upper part, and when the wrist arm is pulled to the lower base, the personnel at the upper base holds the wrist arm, and the personnel at the lower base hold the rod porcelain to insert the inclined wrist arm into the steel cap and fasten the U-shaped bolt according to the standard torque; c-3, gradually loosening the rope to a proper position, holding the porcelain on the upper base, inserting the flat cantilever into the steel cap, and fastening the U-shaped bolt according to the standard torque
5-2, wrist and arm adjustment: the relation and the adjustment requirement of the non-working branch contact line at the conversion column and the working branch positioning tube are that the non-working branch contact line at the conversion column is required to be positioned above the working branch positioning tube, and the clearance between the non-working branch contact line and the working branch positioning tube is required to be ensured to be not less than 50mm; the lifting amount of the non-working branch contact line considers the stress of the dropper, and simultaneously ensures that the horizontal distance between the two contact lines is 500mm, and the allowable error is +/-20 mm; the insulation distance between the work supporting force cable and the inclined cantilever of the non-work support and the inclined suspension wire of the positioning pipe at the central column is more than or equal to 500mm, and the allowable deviation is 0 to +50mm; the height error of the suspension point contact line is +/-20 mm, and the structure height error is +/-100 mm;
5-3, positioning adjustment: the offset direction of the locator is consistent with that of the cantilever, the offset values are equal, and the locator and the cantilever are always in the same plane;
5-4, replacing the hanging strings: the adjustable dropper is changed into an integral dropper; 5-4, replacing the suspension strings, namely, performing the length of the integral suspension string on site by upper personnel according to the length of the adjustable suspension string, comparing the prefabricated suspension string with the adjustable suspension string, removing the adjustable suspension string by using a torque wrench after the fact that the prefabricated suspension string is correct, replacing the integral suspension string in place, and measuring and recording the contact suspension after the adjustment by using a laser measuring instrument.
5-5 suspension adjustment.
The adjusted schematic diagram is shown in fig. 4, and it can be seen from the diagram that the arrangement form of the modified turnout section contact network is a 4-span insulation joint form, and the arrangement form combines the non-cross turnout arrangement and 2 4-span insulation joints, so that the requirement that the train is switched to the contact network to take current at the 42# turnout of the train is met, the requirement that the electricity of different lines is separated at the 42# turnout is met, the requirement of electricity segmentation is met, and the reliability and the safety of power supply of different power supply units are ensured.
The electrical connection in the reversed position in fig. 4 has not been removed, and in the final state it is removed after the retrofitting has been completed. The final state is shown in fig. 5.
Application and Effect examples
The method is applied to four-electrical engineering from Hangzhou to Huangshan railway.
The Hangzhou-to-Huangshan railway line is provided with 10 stations such as Hangzhou east, hangzhou south, fuyang, china unit, jiangdong, chunan, sanyang, beixi, she county north and Huangshan north, and the operating length from the Hangzhou east station to the Huangshan station is 287.530km, wherein the Hangzhou long high-speed railway is communicated with the Hangzhou Huang railway through 4 groups of crossover lines formed by 8 groups of No. 42 turnouts, the Hangzhou south railway is called Hangzhou south railway, and the crossover lines go up and down in a temple tunnel and a Zhao dock tunnel respectively. Before transformation, no electric subsection is arranged on a crossover line between No. 42 turnout Hangzhou yellow and Hangzhou long in a tunnel of a Hangzhou south line station, the line station section is powered by a pump traction substation, hangzhou long and Hangzhou yellow downlink power supply units are Hu Kun high-speed rail 903 power supply units, and Hangzhou long and Hangzhou yellow uplink power supply units are Hu Kun high-speed rail 904 power supply units. After the transformation is completed, the upward and downward of the Hangzhou yellow railway are powered by Hangzhou Chang high-speed 5103 and 5104 power supply units. The Hangzhou yellow railway is opened and operated in 2018, 12 and 25 months, after the transformation is completed at present, the Hangzhou south line is operated for more than 2 years, the equipment is well operated, and compared with the mode that joint type electric sections are added in other sections on the line, the construction is completed by applying 24 skylight points in total. Greatly saving the construction time and cost and reducing the influence on the environment. The current arrangement situation of the existing construction method is compared with the current arrangement situation after transformation, as shown in fig. 1 and 5.
According to the comprehensive construction method, the contents of carrier cables, contact line erection, dropper replacement, cable reverse connection, high-speed non-crossing turnout adjustment and the like need to be carried out simultaneously, and from the practical effect, the completion of the transformation construction ensures that the yellow Hangzhou passenger special line and the Changthou passenger special line independently supply power, enhances the power supply safety and reliability of each line, achieves good operation effect, and is recommended to be popularized and applied in the transformation of the non-crossing turnout in the high-speed railway tunnel.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.
Claims (6)
1. A42 # turnout junction contact net non-cross turnout-change joint type electric subsection arrangement construction method is characterized by comprising the following steps,
the method comprises the following steps: changing a positive feeder;
step two: unloading and adjusting tension;
step three: newly erecting and reversely connecting;
step four: the auxiliary line 1 is reversely connected with the connecting line;
step five: adjusting an insulation joint;
in the first step, the method comprises the following steps,
1-1 marker measurement: measuring the positive feeder shoulder frame by using a laser measuring instrument, and marking the position which does not meet the requirement of the insulation distance;
1-2 shoulder rack assembly: assembling the positive feeder shoulder frame connecting component at the mark;
1-3, dismantling the old shoulder frame: removing the old shoulder rack at the marked position and conveying the shoulder rack to the ground;
1-4, mounting a new shoulder frame: and installing a new shoulder frame at the position where the old shoulder frame is removed.
2. The method for constructing the crossover-free switch-joint type electric subsection of the overhead line system at the 42# turnout position according to claim 1, wherein the second step comprises the following steps,
2-1, dismantling a part of weight: the tension of a carrier cable and a contact wire reaches 15KN by dismantling the weight, and the guide height and the pull-out value of a locomotive pantograph in an equal-height area of a contact net are measured by a laser measuring instrument before dismantling and marked;
2-2, dismantling the existing integral dropper:
2-3, installing an adjustable hanging string: adjusting the section formed after the removal of the step 2-1 and the step 2-2 and subjected to the tension unloading by using an adjustable dropper, and recovering the section to the original equal-height area;
and 2-4, adjusting the contact suspension to restore the height guiding and pulling values of the equal-height area of the contact net to the state before the balance weight is removed.
3. The construction method for the crossover-free switch-joint type electrical section arrangement of the contact networks at the No. 42 turnout in the claim 1 is characterized by comprising the following steps in the third step,
3-1, erecting a new carrier cable: mounting an anchor base and erecting a new catenary by using an existing channel at the anchor lifting position of the connecting line, and fixing the newly erected anchor section catenary to the flat cantilever by using a catenary seat on the existing cantilever;
3-2, reversely connecting a new carrier cable: disconnecting the auxiliary line 2 at the position 5m away from one side of the E0E1 hoisting column, inversely connecting the auxiliary line with the newly erected carrier cable, installing insulation after the inverse connection, and installing equipotential electrical connection;
3-3, erecting a new contact line: erecting a new contact line at the anchor-lifting position of the connecting line, and fixing the newly erected anchor section contact line on the inclined cantilever by using an anchor support clip on the existing cantilever;
3-4, connecting a new contact line in an inverted manner;
3-5 suspension adjustment: and the height guiding and pulling values of the equal-height area of the contact net are restored to the state before the weight is removed.
4. The construction method for the crossover-free switch-joint type electrical section arrangement of the contact networks at the No. 42 turnout in the claim 1 is characterized in that the fourth step comprises the following steps,
4-1, reversely connecting the old carrier cables: before construction, respectively guiding the newly erected bearing guide to the wrist arm to replace the original connecting line; 4-2, reverse connection of old contact lines: connecting the auxiliary line 1 contact line and the existing tie line contact line to one;
4-3, dismantling the hanging columns: dismantling the F0F1 middle suspension post marked in advance;
4-4 mounting electric connection: installing equipotential electrical connection at the reverse connection position by using a fastening wire clamp;
4-5 suspension adjustment: the contact suspension is adjusted.
5. The method for constructing the crossover-free switch-joint type electric subsection of the overhead line system at the 42# turnout position according to claim 1, wherein the fifth step comprises the following steps,
5-1 replacement of the unsatisfactory arm and positioning device: adjusting the contact suspension in the whole construction section, marking the position which does not meet the requirement through measurement, and removing the corresponding positioning device; dismantling the wristarm which does not meet the insulation condition, and installing the wristarm which meets the requirement;
5-2, wrist and arm adjustment: the relation and adjustment requirement of the non-working branch contact line at the conversion column and the working branch positioning pipe are that the non-working branch contact line at the conversion column is positioned above the working branch positioning pipe, and the gap between the non-working branch contact line and the working branch positioning pipe is not less than 50mm; the lifting amount of the non-working support contact line takes the stress of a dropper into consideration, and simultaneously the horizontal distance between the two contact lines is ensured to be 500mm, and the allowable error is +/-20 mm; the insulation distance between the work supporting force cable and the inclined cantilever of the non-work support and the inclined suspension wire of the positioning pipe at the central column is more than or equal to 500mm, and the allowable deviation is 0 to +50mm; the height error of the suspension point contact line is +/-20 mm, and the structure height error is +/-100 mm;
5-3, positioning adjustment: the offset direction of the locator is consistent with that of the wrist arm, the offset values are equal, and the locator and the wrist arm are always in the same plane;
5-4, replacing the hanging string: the adjustable dropper is changed into an integral dropper;
5-5 suspension adjustment: and the height guiding and pulling values of the equal-height area of the contact net are restored to the state before the weight is removed.
6. The construction method for changing the joint type electrical section arrangement of the catenary at 42# turnout without crossing points is characterized in that 5-4 dropper replacement is implemented by prefabricating the length of the integral dropper on site by upper personnel according to the length of the adjustable dropper, comparing the prefabricated dropper with the adjustable dropper, removing the adjustable dropper by using a torque wrench after the correctness is confirmed, replacing the integral dropper in place, measuring the adjusted contact suspension by using a laser measuring instrument, and recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927768.3A CN113602156B (en) | 2021-08-13 | 2021-08-13 | 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927768.3A CN113602156B (en) | 2021-08-13 | 2021-08-13 | 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113602156A CN113602156A (en) | 2021-11-05 |
| CN113602156B true CN113602156B (en) | 2023-02-21 |
Family
ID=78308419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110927768.3A Active CN113602156B (en) | 2021-08-13 | 2021-08-13 | 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113602156B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602329A (en) * | 2009-07-01 | 2009-12-16 | 中铁七局集团电务工程有限公司 | The construction method of railway existing line 250km/h contact net system |
| CN102991376A (en) * | 2012-12-06 | 2013-03-27 | 中铁六局集团有限公司 | Construction method for simultaneously performing dial-up connection on contact networks for existing double circuits |
| CN111469717A (en) * | 2020-05-09 | 2020-07-31 | 中铁十二局集团电气化工程有限公司 | No-crossing arrangement construction method for contact net at No. 42 turnout |
-
2021
- 2021-08-13 CN CN202110927768.3A patent/CN113602156B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602329A (en) * | 2009-07-01 | 2009-12-16 | 中铁七局集团电务工程有限公司 | The construction method of railway existing line 250km/h contact net system |
| CN102991376A (en) * | 2012-12-06 | 2013-03-27 | 中铁六局集团有限公司 | Construction method for simultaneously performing dial-up connection on contact networks for existing double circuits |
| CN111469717A (en) * | 2020-05-09 | 2020-07-31 | 中铁十二局集团电气化工程有限公司 | No-crossing arrangement construction method for contact net at No. 42 turnout |
Non-Patent Citations (1)
| Title |
|---|
| 隧道内42号道岔接触网无交叉线岔布置调整;李茂才;《电气化铁道》;20190215;第30卷(第1期);第57-63页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113602156A (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108532465B (en) | A kind of construction method of the main bridge of Through Steel case arch bridge | |
| CN110303949B (en) | Rigid-flexible transition construction method for overhead rigid contact network of rapid rail transit at speed of 160km per hour | |
| CN111907378B (en) | Passenger-cargo collinear carrier cable and contact line synchronous replacement construction process | |
| CN110641319B (en) | Construction method for erecting overhead line system of ascending and descending crossover line of electrified railway | |
| CN106592441A (en) | Mounting method of stayed cable of cable-stayed bridge | |
| CN102991376B (en) | A kind of existing double-circuit pulls and connects the construction method of contact net simultaneously | |
| CN106099757A (en) | A kind of transmission line insulator crosses over crane span structure and construction technology thereof | |
| CN112389282A (en) | Construction method for expansion joint of overhead rigid contact network at speed of 160km per hour | |
| CN111661761A (en) | Novel subway track laying construction equipment and technology | |
| CN113602156B (en) | 42# turnout junction contact net non-cross turnout-to-joint type electric sectional arrangement construction method | |
| CN111469717B (en) | No-cross arrangement construction method for contact network at 42# turnout | |
| CN101546894A (en) | Method for replacing 220KV steel pipe tower composite insulator electrifiedly | |
| CN108909533B (en) | Construction method for integrally replacing existing electrified railway contact net crossover and sectional insulator | |
| CN112776677A (en) | Electrified railway contact net suspension structure suitable for big current-carrying capacity | |
| WO2021223443A1 (en) | Construction method for temporary positioning of overhead line in adverse terrain | |
| CN102642482B (en) | Urgent repair construction method for anchor mast of catenary | |
| CN206528368U (en) | Electrification railway contact net spacing positioning apparatus | |
| CN112297958B (en) | Method for replacing whole dropper in whole anchor section of 350km/h high-speed rail contact network | |
| CN106968178A (en) | A kind of cable-stayed type suspension bridge main girder construction method | |
| US11894667B2 (en) | Method and equipment for the installation of a power cable in a tunnel | |
| CN212543699U (en) | Structure for simultaneously installing photovoltaic module and contact net | |
| CN113235433B (en) | Method and device for accurately and quickly positioning cable saddle of cable-separating pipe of short-tower cable-stayed bridge | |
| Mak | Adoption of overhead rigid conductor rail system in MTR extensions | |
| LU500172B1 (en) | A construction method of catenary temporary positioning at the adverse landform | |
| CN111874745A (en) | High-speed rail trackless constant-tension contact line erecting technology and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |