阅读说明：本技术 一种轨道交通接触网弹性支座的安装方法 (Installation method of elastic support of rail transit contact net ) 是由 解廷伟 毕聪 吴楠 郭涵 李金山 沈葛 于 2020-07-01 设计创作，主要内容包括：本发明提供了一种轨道交通接触网弹性支座的安装方法,包括以下步骤：S1、测量弹性支座的安装位置；S2、提前在测量标记好的弹性支座的安装位置处预埋化学锚栓；S3、将弹性支座与化学锚栓固定连接；S4、将接触线固定于弹性支座的接触线线夹；S5、将弹性支座的定位器向下拉,使接触线的高度低于设计标准30～40㎜；S6、将接触线调高至设计标准,并将弹性支座的弹性元件的缺口限制在限定标志之内,固定弹性元件的紧定螺丝；S7、调整接触线线夹螺丝,使弹性支座的拉出值达到设计标准。本发明的有益效果是：改善了施工工艺过程,简化了施工工艺,提高了城市轨道交通接触网的施工质量,保证了接触网的性能。(The invention provides a method for mounting an elastic support of a rail transit contact net, which comprises the following steps: s1, measuring the installation position of the elastic support; s2, embedding chemical anchor bolts at the installation positions of the elastic supports marked by the measurement in advance; s3, fixedly connecting the elastic support with a chemical anchor bolt; s4, fixing the contact wire to a contact wire clamp of the elastic support; s5, pulling the positioner of the elastic support downwards to enable the height of the contact line to be lower than the design standard by 30-40 mm; s6, adjusting the contact line to the design standard, limiting the gap of the elastic element of the elastic support in a limit mark, and fixing a fastening screw of the elastic element; and S7, adjusting the contact wire clamp screw to enable the pull-out value of the elastic support to reach the design standard. The invention has the beneficial effects that: the construction process is improved, the construction process is simplified, the construction quality of the urban rail transit contact network is improved, and the performance of the contact network is ensured.)

1. The mounting method of the elastic support of the rail transit contact net is characterized by comprising the following steps of:

s1, measuring the installation position of the elastic support;

s2, embedding chemical anchor bolts at the installation positions of the elastic supports marked by the measurement in advance;

s3, fixedly connecting the elastic support with a chemical anchor bolt;

s4, fixing the contact wire to a contact wire clamp of the elastic support;

s5, pulling the positioner of the elastic support downwards to enable the height of the contact line to be lower than the design standard by 30-40 mm;

s6, adjusting the contact line to the design standard, limiting the gap of the elastic element of the elastic support in a limit mark, and fixing a fastening screw of the elastic element;

and S7, adjusting the contact wire clamp screw to enable the pull-out value of the elastic support to reach the design standard.

2. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S1, before measurement, the selection of the length of the insulating positioning rod of the elastic support is determined, after the length of the insulating positioning rod is determined, the positioning gradient of the contact wire is inversely calculated according to the length of the insulating positioning rod, the height and the pull-out value of the bottom center of the elastic support are calculated according to the designed guide height, and after the height of the bottom center of the elastic support is known, the installation position of the elastic support is located and marked by using a laser measuring instrument on the construction site.

3. The method for mounting the elastic support of the rail transit contact net according to claim 2, wherein the method comprises the following steps: in step S1, the measurement of the installation position of the elastic support is performed in the longitudinal direction and then in the transverse direction along the rail, as measured at the construction site.

4. The method for mounting the elastic support of the rail transit contact net according to claim 2, wherein the method comprises the following steps: in step S1, during measurement at the construction site, a measurement starting point is first determined, and the starting point is selected to be at an anchor segment joint or a turnout; during measurement, the measurement is carried out along the line according to the distance between a starting point and a positioning point shown in a design plan; measuring the curve section along the outer rail, measuring the position of each positioning point, wherein the span of the curve section is more than or equal to 7m and less than or equal to 12m, and the curve meets the design requirement; and simultaneously, checking whether the positions of the civil air defense doors at the two ends of the station accord with the design drawing or not, and whether the positions and the heights of the air pipes of the station accord with the design positions or not.

5. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S1, during measurement in the construction site, if the span designed according to the construction design drawing is located at the tunnel expansion joint, the tunnel connecting joint, the segment joint of the shield section, or the water seepage and leakage, the displacement along the line is avoided, but the maximum displacement is not more than ± 0.5m, and the maximum allowable value of the designed span is not exceeded, the displacement is not allowed for the suspension positioning points at the anchor segment joint, the segment insulator and the turnout, and during the measurement, the measurement result is checked at any time by using the actual mileage mark to prevent the accumulated deviation.

6. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S1, during measurement in a construction site, when the lower anchor device is determined, the distance from the compensating wheel of the lower anchor device to the wall after being stressed is calculated according to the lower anchor installation diagram, and then the distance from the tunnel wall at the lower anchor to the line center is measured; meanwhile, according to a tunnel equipment clearance diagram provided by design, whether the anchoring device and the balance weight string meet the requirement of equipment clearance is confirmed, and if not, the device moves to a remote position of the anchoring point; making the anchor angle less than 12 °; after the position of the anchoring device is determined, whether the area of the anchoring device is influenced by a fire hose or a sewer pipe is checked; checking whether the installation area of the various cables and the balance device balance weight limiting frame is influenced; the insulation distance of the lower anchor support meets the design requirement; when the isolating switch is determined, selecting a position which is close to a feeder line of a traction substation and can meet the limit requirement; meanwhile, the insulation distance and the limit of the disconnecting switch when the disconnecting switch is in the disconnecting position are considered, and whether the area of an operating mechanism of the disconnecting switch is influenced by a fire hose and a cable or not is considered.

7. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S2, a pull-out test is performed on the pre-buried chemical anchor bolt to make the pre-buried chemical anchor bolt meet the design standard.

8. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S3, when the elastic support is mounted, a pad plate with a corresponding size is prepared in advance, and the angle of the elastic support is adjusted by the pad plate so that the gradient of the insulating positioning rod of the elastic support reaches a standard value.

9. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S4, if the contact line is not lowered, the adjustable fork-shaped double-lug screw is loosened, the positioner of the elastic support is pulled downward, the height of the contact line is lower than the design standard by 30 mm to 40 mm, and the adjustable fork-shaped double-lug screw is fixed.

10. The method for mounting the elastic support of the rail transit contact net according to claim 1, wherein the method comprises the following steps: in step S5, the contact wire is adjusted up to the design standard with a C-type special wrench, the gap of the elastic element is limited within the limit mark, and the screw is tightened with M12 with 35Nm force to fix the elastic element.

Technical Field

The invention relates to an elastic support, in particular to an installation method of an elastic support of a rail transit contact net.

Background

At present, urban rail transit in China develops rapidly, and the application of the elastic support is increasingly wide. When a tunnel with low clearance or a civil air defense door contact net passes through, in order to ensure that the elasticity of the contact net can meet the operation quality and the sufficient insulation distance, the suspension mode of the elastic support is generally adopted to improve.

The existing elastic support is complex in installation and poor in construction quality, and the performance of a contact net is affected.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a method for mounting an elastic support of a rail transit contact net.

The invention provides a method for mounting an elastic support of a rail transit contact net, which comprises the following steps:

s1, measuring the installation position of the elastic support;

s2, embedding chemical anchor bolts at the installation positions of the elastic supports marked by the measurement in advance;

s3, fixedly connecting the elastic support with a chemical anchor bolt;

s4, fixing the contact wire to a contact wire clamp of the elastic support;

s5, pulling the positioner of the elastic support downwards to enable the height of the contact line to be lower than the design standard by 30-40 mm;

s6, adjusting the contact line to the design standard, limiting the gap of the elastic element of the elastic support in a limit mark, and fixing a fastening screw of the elastic element;

and S7, adjusting the contact wire clamp screw to enable the pull-out value of the elastic support to reach the design standard.

As a further improvement of the present invention, in step S1, before measurement, the selection of the length of the insulating positioning rod of the elastic support is determined, after the length of the insulating positioning rod is determined, the positioning gradient of the contact line is calculated according to the length of the insulating positioning rod, the height of the bottom center of the elastic support and the pull-out value are calculated according to the designed lead height, and after the height of the bottom center of the elastic support is known, the installation position of the elastic support is located and marked by using a laser measuring instrument in the construction site.

As a further improvement of the present invention, in step S1, the measurement process of the installation position of the elastic support is performed in the longitudinal direction and then in the transverse direction of the rail when measuring at the construction site.

As a further improvement of the invention, in step S1, during measurement at the construction site, a measurement starting point is first determined, and the starting point is selected to be at an anchor segment joint or a turnout; during measurement, the measurement is carried out along the line according to the distance between a starting point and a positioning point shown in a design plan; measuring the curve section along the outer rail, measuring the position of each positioning point, wherein the span of the curve section is more than or equal to 7m and less than or equal to 12m, and the curve meets the design requirement; and simultaneously, checking whether the positions of the civil air defense doors at the two ends of the station accord with the design drawing or not, and whether the positions and the heights of the air pipes of the station accord with the design positions or not.

As a further improvement of the present invention, in step S1, during measurement in the construction site, if the span designed according to the construction design drawing is located at the tunnel expansion joint, the tunnel joint, the segment joint of the shield segment, or the water seepage and leakage, the displacement along the line is avoided, but the maximum displacement does not exceed ± 0.5m, and the maximum span allowable value is not exceeded, the displacement is not allowed for the suspension positioning points at the anchor segment joint, the segment insulator and the turnout, and during the measurement process, the measurement result is checked at any time by using the actual mileage mark to prevent the accumulation deviation.

As a further improvement of the present invention, in step S1, during the measurement at the construction site, when the lower anchor device is determined, the distance from the compensating wheel of the lower anchor device to the wall after being stressed is calculated according to the lower anchor installation diagram, and then the distance from the tunnel wall at the lower anchor to the line center is measured; meanwhile, according to a tunnel equipment clearance diagram provided by design, whether the anchoring device and the balance weight string meet the requirement of equipment clearance is confirmed, and if not, the device moves to a remote position of the anchoring point; making the anchor angle less than 12 °; after the position of the anchoring device is determined, whether the area of the anchoring device is influenced by a fire hose or a sewer pipe is checked; checking whether the installation area of the various cables and the balance device balance weight limiting frame is influenced; the insulation distance of the lower anchor support meets the design requirement; when the isolating switch is determined, selecting a position which is close to a feeder line of a traction substation and can meet the limit requirement; meanwhile, the insulation distance and the limit of the disconnecting switch when the disconnecting switch is in the disconnecting position are considered, and whether the area of an operating mechanism of the disconnecting switch is influenced by a fire hose and a cable or not is considered.

As a further improvement of the present invention, in step S2, a drawing test is performed on the pre-buried chemical anchor so that the pre-buried chemical anchor meets the design standard.

As a further improvement of the present invention, in step S3, when the elastic support is installed, a pad plate with a corresponding size is prepared in advance, and the angle of the elastic support is adjusted by the pad plate, so that the gradient of the insulating positioning rod of the elastic support reaches a standard value.

As a further improvement of the present invention, in step S4, if the contact line is not adjusted to be low, the adjustable two-ear fork screw is loosened, the positioner of the elastic support is pulled downward, the height of the contact line is reduced to 30 mm to 40 mm, and the adjustable two-ear fork screw is fixed.

As a further improvement of the present invention, in step S5, the contact wire is adjusted up to the design standard by using a C-type special wrench, the gap of the elastic element is limited within the limit mark, and the M12 fastening screw for fixing the elastic element by 35Nm force is used.

The invention has the beneficial effects that: by the scheme, the construction process is improved, the construction process is simplified, the construction quality of the urban rail transit contact net is improved, and the performance of the contact net is guaranteed.

Drawings

Fig. 1 is a schematic view of an elastic support of the installation method of the elastic support of the rail transit contact net.

Fig. 2 is a schematic diagram of an elastic support of the installation method of the elastic support of the rail transit contact net.

Fig. 3 is an installation schematic diagram of the installation method of the elastic support of the rail transit contact net.

Detailed Description

The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in fig. 1 and 2, the elastic support mainly comprises a fixed seat 1, a supporting and fixing plate 2, a spherical gasket 3, a rotating bracket (U-shaped clamp) 5, adjustable fork type double lugs 4, an insulating positioning rod 9, a post insulator 8, a mounting bottom plate 7, an elastic element 6, a round bolt and the like. The elastic support is an important element of a simple suspension structure of a low-clearance tunnel of urban rail transit below 3KV of direct current, and the following characteristic between a contact wire and a pantograph is adjusted through a rubber elastic element of a core part of the elastic support. The suspension device is suitable for the suspension requirement of a single contact wire or double contact wires with low clearance, and has the characteristics of improving the suspension elasticity of the contact wires, reducing the abrasion of the contact wires and the like. Especially when passing through the civil air defense door of low headroom, can set up one section anchor section joint at civil air defense door department, can dwindle the damage range to the contact net when the civil air defense door is closed greatly. The minimum creepage distance of the elastic support is not less than 400mm, the elastic support cannot be used as a lower anchor, but an anchor supporting and positioning clip can be hung on the insulating positioning rod. If meet curved elastic support and only carry out the installation of bending outward, can not install in bending, insulating locating lever is solid pole, can cut, and the cutting locating lever can not destroy elastic support's structure, and the exposure head must not exceed 5cm behind the registration arm installation location fastener.

A method for installing an elastic support of a rail transit contact net comprises the following specific steps:

1. measuring the installation position of the elastic support;

before measurement, the selection of the length of the insulating positioning rod of the elastic support is determined, after the length of the insulating positioning rod 9 is determined, the positioning gradient of a contact line is inversely calculated according to relevant parameters of a product, and the height and the pull-out value of the bottom center of the elastic support are calculated according to the designed guide height. And after the height of the center of the bottom of the elastic support is obtained, a laser measuring instrument is adopted to position the specific installation position of the elastic support on a construction site.

In a low-clearance tunnel or a civil air defense door of low-clearance urban rail transit, an elastic support device is widely used. The elastic support is a device which reduces or reduces hard points generated by a contact line by the vertical movement of a contact line suspension point along with a pantograph, so that the contact line is always in an elastic working state, therefore, in the measuring process, the allowable torsion angle of an elastic rubber sleeve (namely an elastic element 6) which is a core element of the installed elastic support is within +/-12 degrees, the allowable working torque is about 100N.m, the measurement of the position of the elastic support is firstly to ensure the very important process of simple elastic suspension of a tunnel, is the basis for ensuring the normal work of the elastic support, and the measuring process is firstly carried out longitudinally and then transversely.

2. Measuring on site;

before measurement, the length of each station and each section and the actual mileage of different tunnel interfaces, tunnel curve segments, turnouts and other places are determined to be consistent with the design drawing.

During measurement, a measurement starting point is firstly determined, the starting point is generally selected at an anchor section joint and a turnout, during measurement, a steel tape is adopted to measure along a line according to the distance between a starting point and a positioning point shown by a design plan, a curve section is measured along an outer rail, the position of each positioning point is measured, the span is generally 7m or more and L or less than 12m, the curve meets the design requirement, and meanwhile, whether the positions of civil air defense doors at two ends of a station are consistent with the design drawing and whether the position and the height of an air duct of the station are consistent with the design position or not is checked. If the designed span is located at the tunnel expansion joint, the tunnel connecting joint, the segment joint of the shield interval, or the obvious water seepage and leakage, etc., the displacement should be properly along the line to avoid, but the maximum displacement does not exceed plus or minus 0.5m, and the maximum allowable value of the designed span is not exceeded. The anchor section joint, the section insulator, the turnout and other suspension positioning points are not allowed to be displaced, and if the anchor section joint, the section insulator, the turnout and other suspension positioning points need to be displaced in case of special conditions, the displacement is solved by contacting with a design unit. In the measuring process, the measuring result is checked at any time by using the actual mileage mark so as to prevent the accumulation deviation. When the anchoring device is determined, the distance between a compensating wheel of the anchoring device and a wall after the compensating wheel is stressed is calculated according to an anchoring installation diagram, then the distance between the tunnel wall at the anchoring position and the center of a line is measured, meanwhile, whether the anchoring device and a weight string at the position meet the requirement of equipment limitation is confirmed according to a tunnel equipment limitation diagram provided by design, and otherwise, the anchoring device and the weight string are moved to the remote anchoring position. The anchor angle should generally be less than 12 °, which would otherwise cause the anchorage device to intrude into the confines of the vehicle equipment. After the position of the anchoring device is determined, whether the area of the anchoring device is influenced by a fire hose or a sewer pipe or not and whether various cables are influenced by the installation area of the compensation device weight limiting frame or not are also checked, and the insulation distance of the anchoring support meets the design requirement. When the isolating switch is determined, a position which is close to a feeder line of a traction substation and can meet the requirement of a limit is selected, and meanwhile, the insulation distance and the limit of a disconnecting link when the isolating switch is in an off position and whether fire-fighting water pipes, cables and other influences exist in an operating mechanism area of the isolating switch or not are considered.

3. Mounting key points;

1. and (5) embedding a chemical anchor bolt at the position of the elastic support marked by measurement in advance. And (4) performing a drawing test on the pre-embedded chemical anchor bolt, and meeting the design standard.

2. The base plate with the corresponding size needs to be prepared in advance when the elastic support body is installed, the base plate is used for adjusting the angle of the elastic support body, and the gradient of the insulating positioning rod reaches a standard value.

3. The contact wire is fixed on the contact wire clamp.

4. And (3) downwards forcing the positioner (positioning tube) to enable the height of the contact line to be 30-40 mm lower than the design standard, and loosening the adjustable fork-shaped double-lug screw 4 if the contact line is not lowered, so as to fix the screw after the standard is reached.

5. The contact line is adjusted to the design requirement by using a C-type special spanner 11, the notch 13 of the elastic element is limited in the limiting mark 12, and the M12 fastening screw for fixing the elastic element by 35Nm force is used (see figure 3, the arrow direction in figure 3 is the rotating direction of the C-type special spanner 11).

6. If the contact line does not meet the design requirement, the adjustable fork-shaped double-lug screw 4 can be adjusted until the design standard is met, and the adjustable fork-shaped double-lug screw 4 is fixed by 40Nm force.

7. And adjusting the adjusting screw on the rotating bracket (U-shaped clamp) 5 to enable the gap to reach 3-5 mm.

8. And adjusting the contact wire clamp screw to enable the pull-out value to reach the design standard.

9. And screws and nuts for fastening all the elastic supports.

The following considerations are taken during installation:

1. a C-shaped special spanner 11 is arranged on the outer pipe of the elastic element 6, the outer pipe is rotated to adjust the contact line to the correct position, and the notch 13 of the elastic element is limited in the limiting mark 12, otherwise, an overload phenomenon occurs.

2. If the indentation 13 of the spring element cannot be limited within the limit mark 12, the entire spring support should be raised or lowered to meet the requirements.

3. The elasticity of the elastic element is noticed during daily maintenance, if the torsion of the fastening bolt of the elastic element is too large, the elasticity of the elastic element is damaged, and once the torsion is found, the elastic element is replaced.

The double-contact-line elastic support can be adopted, and the elastic support is adopted at the civil air defense door to set one section of anchor section joint, so that the damage range of the contact net when the civil air defense door is closed emergently is reduced.

The installation method of the elastic support of the rail transit contact net provided by the invention completely meets the requirements of a construction site and ensures the performance of the contact net. Therefore, the requirements of design and owners are met, the urban rail transit is developed rapidly at present, the application of the elastic support is more, experience is continuously summarized in the future, the construction process and the construction method of the elastic support are perfected, and the construction quality of the urban rail transit contact net is improved.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.