阅读说明：本技术 一种适用于低净空轻量化汇流排膨胀接头 (Be applicable to low headroom lightweight busbar expansion joint ) 是由 冯晓河 王涛 熊星 宋博瀚 陆佳 张琳 孙硕 谢峰 崔浩峰 张敏 郭建华 葛志 于 2021-10-29 设计创作，主要内容包括：本发明涉及一种适用于低净空轻量化汇流排膨胀接头,包括：两平行设置的第一、第二膨胀接头；第一取流器,其一端与第一膨胀接头固定连接,另一端底部固定设置有下压板；第二取流器,其一端与第二膨胀接头固定连接,另一端底部固定设置有下压板；下压板具有一水平设置的水平段,水平段内开设有凹槽,其内安装有顶部与第二膨胀接头或第一膨胀接头底部相抵的压块；压块与取流器底部配合夹持第二膨胀接头或第一膨胀接头,并将第一取流器与第二膨胀接头滑动连接或将第二取流器与第一膨胀接头滑动连接；第一膨胀接头可相对于第二膨胀接头滑动,保证机车稳定运行,提高机车运行的安全性和可靠性。(The invention relates to a low-clearance lightweight busbar expansion joint, which comprises: two first and second expansion joints arranged in parallel; one end of the first flow taking device is fixedly connected with the first expansion joint, and the bottom of the other end of the first flow taking device is fixedly provided with a lower pressing plate; one end of the second flow taking device is fixedly connected with the second expansion joint, and the bottom of the other end of the second flow taking device is fixedly provided with a lower pressing plate; the lower pressing plate is provided with a horizontal section which is horizontally arranged, a groove is formed in the horizontal section, and a pressing block with the top abutting against the bottom of the second expansion joint or the bottom of the first expansion joint is arranged in the groove; the pressing block is matched with the bottom of the current collector to clamp the second expansion joint or the first expansion joint, and the first current collector is connected with the second expansion joint in a sliding mode or the second current collector is connected with the first expansion joint in a sliding mode; the first expansion joint can slide relative to the second expansion joint, so that the stable operation of the locomotive is ensured, and the safety and the reliability of the operation of the locomotive are improved.)

1. A low-clearance lightweight busbar expansion joint suitable for use, comprising:

the two expansion joints are arranged in parallel;

one end of the first flow taking device is fixedly connected with the first expansion joint, and the bottom of the other end of the first flow taking device is fixedly provided with a lower pressing plate;

one end of the second flow taking device is fixedly connected with the second expansion joint, and the bottom of the other end of the second flow taking device is fixedly provided with the lower pressing plate;

the lower pressing plate is provided with a horizontal section which is horizontally arranged, a groove is formed in the horizontal section, and a pressing block with the top abutting against the bottom of the second expansion joint or the first expansion joint is arranged in the groove;

the pressing block and the bottom of the current extractor are matched to clamp the second expansion joint or the first expansion joint, and the first current extractor is connected with the second expansion joint in a sliding mode or the second current extractor is connected with the first expansion joint in a sliding mode.

2. The expansion joint for low-clearance and light-weight busbar according to claim 1, wherein an elastic member is placed in said groove, and said elastic member acts on the bottom of said pressing block.

3. The expansion joint for the low-clearance light-weight busbar according to claim 1, wherein a first semicircular groove is formed at the top of the second expansion joint or the first expansion joint;

a second semicircular groove is formed in the bottom of the first flow taking device or the second flow taking device, and the length of the first semicircular groove is larger than that of the second semicircular groove;

the spring contact finger is arranged in the first semicircular groove and the second semicircular groove;

and the carbon sliding plate is arranged at the end part of the spring contact finger and is positioned in the first semicircular groove and the second semicircular groove.

4. The expansion joint for the low-clearance light-weight busbar according to claim 1, wherein the first flow collector and the first expansion joint are connected through a bolt, and a watchband contact finger is arranged between the first flow collector and the first expansion joint;

the second flow collector and the second expansion joint are connected through bolts, and a watchband contact finger is arranged between the second flow collector and the second expansion joint.

5. The expansion joint for the low-clearance light-weight busbar according to claim 1, wherein a sliding groove is formed between the first expansion joint and the second expansion joint;

the sliding block is positioned in the sliding groove and is fixed with the first expansion joint or the second expansion joint;

a chip groove formed in the chute.

6. The expansion joint for the low-clearance and light-weight busbar according to claim 5, wherein a hollow groove is formed at the end of the sliding groove;

the length of the hollow-out groove is larger than that of the sliding block.

7. The expansion joint for low-clearance and light-weight busbar according to claim 6, wherein a pull bolt is fixed to an end of the sliding block.

8. The expansion joint for low-clearance and light-weight busbar according to claim 6, wherein a limiting bolt is arranged in the hollow groove.

9. The expansion joint for low-clearance and light-weight bus bar of claim 1, wherein the end of the first or second flow collector is connected to the bus bar by a bolt.

Technical Field

The invention relates to an expansion joint, in particular to a low-clearance lightweight busbar expansion joint.

Background

Urban rail transit is constrained by conditions such as landforms, urban planning and the like, most urban areas are underground sections, contact networks in tunnels of the underground sections are mainly rigidly suspended, and the structural height of the overhead contact system is limited by tunnel clearance; in engineering practice, a rigid contact net suspension system and parts not only meet the requirement of tunnel clearance, but also ensure safe and reliable power supply; therefore, the development of the bus bar expansion joint suitable for the low-clearance tunnel environment is a trend of the future development of the rigid contact network.

The ideal operation state of the rigid suspension power supply system is reliable contact between bow nets, and guarantees that the electric locomotive continuously obtains electric energy from the contact nets; reliable contact and interaction between the pantograph and the contact line are important conditions for ensuring good current collection of the electric locomotive.

The rigid contact net suspension structure has higher rigidity, and the pantograph can be impacted when passing through a positioning point with higher rigidity at high speed, and is not favorable for good pantograph-catenary dynamic current collection particularly at an anchor section joint; the problem that the contact line of a rigid contact net is seriously abraded and uneven due to high rigidity of a positioning point is prominent, normal contact and current collection among bow nets are influenced, and further the operation safety is influenced; the busbar expansion joint is connected in series between the busbars of the two anchor sections, and due to sudden increase of weight and sudden change of contact force of the pantograph, hard points between pantograph nets are formed, and high-temperature electric arcs generated in the moment of pantograph net off-line and off-line caused by the hard points bring great harm to contact networks and the pantograph.

Therefore, the dead weight of the expansion joint of the bus bar can influence the smoothness of the contact line, the smaller the dead weight is, the smaller the sag is, the smoother the contact line is, the more reliable the contact line is contacted with the pantograph, and the safe operation of a power supply system can be better ensured. Meanwhile, the problem of convenient replacement of parts after the parts are installed and applied is considered, so that the working efficiency of inspection and maintenance is improved.

Based on the aforesaid, how to provide a lightweight busbar expansion joint suitable for low headroom, can be applicable to the tunnel environment of low headroom, can compensate the expend with heat and contract with cold that the system leads to because of temperature variation again, guarantee the smoothness of contact line through restricting expansion joint sag, realize the reliable contact between anchor section joint department pantograph and the contact line, guarantee that the pantograph is good to be got current, promote the followup nature of pantograph to the rigidity contact net, improve pantograph-catenary current collection quality, have important meaning to reducing whole engineering investment.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to realize good electrical connection and smooth transition between anchor sections in a low-clearance tunnel environment.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention relates to a low-clearance lightweight busbar expansion joint, which comprises: the two expansion joints are arranged in parallel; one end of the first flow taking device is fixedly connected with the first expansion joint, and the bottom of the other end of the first flow taking device is fixedly provided with a lower pressing plate; one end of the second flow taking device is fixedly connected with the second expansion joint, and the bottom of the other end of the second flow taking device is fixedly provided with a lower pressing plate; the lower pressing plate is provided with a horizontal section which is horizontally arranged, a groove is formed in the horizontal section, and a pressing block with the top abutting against the bottom of the second expansion joint or the bottom of the first expansion joint is arranged in the groove; the pressing block is matched with the bottom of the current collector to clamp the second expansion joint or the first expansion joint, and the first current collector is connected with the second expansion joint in a sliding mode or the second current collector is connected with the first expansion joint in a sliding mode;

one side of the first fluid taking device is fixedly connected with a first expansion joint, and the other side of the first fluid taking device is movably connected with a second expansion joint; one side of the second flow taking device is fixedly connected with a second expansion joint, the other side of the second flow taking device is movably connected with a first expansion joint, and the flow taking device and the expansion joint are clamped through clamping of the nylon pressing block and the lower pressing plate, so that the sag of the expansion joint is limited; when the power supply system freely stretches out and draws back due to expansion with heat and contraction with cold in the line, the first expansion joint can slide relative to the second expansion joint, good electrical connection and smooth transition between anchor sections are achieved, stable operation of the locomotive is guaranteed, and safety and reliability of operation of the locomotive are improved.

According to the invention, the elastic piece is placed in the groove and acts on the bottom of the pressing block, so that the pressing block is always abutted against the bottom of the expansion joint.

Under the effect of elastic component, the briquetting offsets with the bottom of first expansion joint all the time to realized the centre gripping to first expansion joint or second expansion joint.

According to the invention, a first semicircular groove is formed in the top of the second expansion joint or the first expansion joint; the bottom of the first flow taking device or the second flow taking device is provided with a second semicircular groove, and the length of the first semicircular groove is greater than that of the second semicircular groove; spring contact fingers are arranged in the first semicircular groove and the second semicircular groove; the function of which is to achieve sliding electrical contact.

Spring touches and indicates one end to be provided with the carbon slide, and its effect is: removing dust in the second semicircular groove of the expansion joint in the sliding process to ensure good contact between the spring contact finger and the expansion joint; the graphite scraps rubbed off in the sliding process can play a role in lubrication, so that the sliding is smoother.

And the spring device is arranged at the upper part of the carbon sliding plate and can apply vertical pressure to the carbon sliding plate in the sliding consumption process of the sliding plate so as to keep the carbon sliding plate in contact with the second semicircular groove.

In order to realize the fixed connection of the first busbar and the flow collector, the first flow collector and the first expansion joint are connected through a bolt, and a watchband contact finger is arranged between the first flow collector and the first expansion joint; the second flow collector and the second expansion joint are connected through bolts, and a watchband contact finger is also arranged between the second flow collector and the second expansion joint; the function of the strap fingers is to make a fixed electrical contact.

In order to ensure smooth sliding between the first expansion joint and the second expansion joint, a sliding groove is arranged between the first expansion joint and the second expansion joint; the sliding block is positioned in the sliding groove and is fixed with the first expansion joint or the second expansion joint; a chip groove which is arranged in the chute.

A sliding block is arranged between the first expansion joint and the second expansion joint, the fixed end of the sliding block is made of stainless steel, and the sliding end is made of high polymer materials and is wrapped by a stainless steel body, so that the integral structure of the sliding block has high strength, and the sliding end has good wear resistance and self-lubricating performance; a plurality of chip grooves are designed on the first expansion joint or the second expansion joint, and dust accumulated in the operation process can be effectively removed.

In order to facilitate the replacement of the sliding block, the end part of the sliding chute is provided with a hollow groove; the length of the hollow groove is greater than that of the sliding block;

in order to facilitate the replacement of the sliding block, the sliding block is pulled out, and a pulling bolt is fixed at the end part of the sliding block;

in order to prevent the sliding block from being separated under the condition of effective operation, the hollow groove is internally provided with a limiting bolt.

In order to increase the contact surface with the bus bar and improve the conductivity; the invention adopts the characteristic that the end part of the first expansion joint or the second expansion joint is provided with the aluminum cushion block which is contacted with the bus bar.

In order to reduce the overall weight of the expansion joint of the bus bar, the invention adopts two small-area aluminum alloy blocks as the current collectors, so that the self weight of the expansion joint is greatly reduced while good electrical connection is ensured, thereby reducing the sag and achieving the effect of ensuring smooth contact lines.

The invention has the beneficial effects that: the invention is a low-clearance lightweight busbar expansion joint, the weight is especially light, the first expansion joint can slide relative to the second expansion joint, the stable operation of a locomotive is ensured, and the safety and the reliability of the operation of the locomotive are improved; the self structure height of the device is small, the requirement on the clearance is low, and the device can be well applied to a low-clearance tunnel installation environment; in addition, the expansion with heat and contraction with cold that can lead to the system because of temperature variation compensates, guarantees the smooth-going of contact line through restriction expansion joint sag, realizes the reliable contact between anchor segment joint department pantograph and the contact line, guarantees that the pantograph is good to be got the current, promotes the followup nature of pantograph to rigid contact net to improve the pantograph net and receive the current quality.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an exploded view of the second or first flow extractor;

FIG. 3 is a schematic view of the accessories of the sliding chute and the sliding block;

in the figure: 1-a first expansion joint, 2-a second expansion joint, 3-a first flow taking device, 4-a second flow taking device, 5-a lower pressing plate, 6-a horizontal section, 7-a pressing block, 8-a first semicircular groove, 9-a second semicircular groove, 10-a carbon sliding plate, 11-a watchband contact finger, 12-a sliding groove, 13-a sliding block, 14-a chip groove, 15-a hollow groove, 16-a lifting bolt, 17-a limiting bolt, 18-an aluminum cushion block and 19-a busbar.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-2, the present invention is a low clearance lightweight expansion joint for a busbar, comprising: the expansion joint comprises a first expansion joint 1 and a second expansion joint 2 which are arranged in parallel; one end of the first flow taking device 3 is fixedly connected with the first expansion joint 1, and the bottom of the other end is fixedly provided with a lower pressing plate 5; one end of the second flow taking device 4 is fixedly connected with the second expansion joint 2, and the bottom of the other end is fixedly provided with a lower pressing plate 5; the lower pressing plate 5 is provided with a horizontal section 6 which is horizontally arranged, a groove is formed in the horizontal section 6, and a pressing block 7 with the top abutting against the bottom of the second expansion joint 2 or the first expansion joint 1 is arranged in the groove; the pressing block 7 is matched with the bottom of the current collector to clamp the second expansion joint 2 or the first expansion joint 1, and the first current collector 3 is in sliding connection with the second expansion joint 2 or the second current collector 4 is in sliding connection with the first expansion joint 1;

one side of the first fluid taking device is fixedly connected with a first expansion joint, and the other side of the first fluid taking device is movably connected with a second expansion joint; one side of the second flow taking device is fixedly connected with a second expansion joint, the other side of the second flow taking device is movably connected with a first expansion joint, and the flow taking device and the expansion joint are clamped through a pressing block and a lower pressing plate, so that the sag of the expansion joint is limited; when the power supply system freely stretches out and draws back due to expansion with heat and contraction with cold in the line, the first expansion joint can slide relative to the second expansion joint, good electrical connection and smooth transition between anchor sections are achieved, stable operation of the locomotive is guaranteed, and safety and reliability of operation of the locomotive are improved.

As shown in fig. 1, in order to reduce the overall weight of the expansion joint of the bus bar, two small-area aluminum alloy blocks are used as a current collector, so that the self weight of the expansion joint is greatly reduced while good electrical connection is ensured, thereby reducing the sag and achieving the effect of ensuring the smoothness of a contact line.

As shown in figure 2, in order to enable the pressing block to be always abutted against the bottom of the expansion joint, the elastic piece is placed in the groove, and acts on the bottom of the pressing block 7.

Under the effect of elastic component, the briquetting offsets with the bottom of first expansion joint all the time to realized the centre gripping to first expansion joint or second expansion joint.

As shown in fig. 1-2, the second expansion joint 2 or the first expansion joint 1 is provided with a first semicircular groove 8 at the top; the bottom of the first flow collector 3 or the second flow collector 4 is provided with a second semicircular groove 9, and the length of the first semicircular groove 8 is greater than that of the second semicircular groove 9; spring contact fingers are arranged in the first semicircular groove 8 and the second semicircular groove 9; the function of which is to achieve sliding electrical contact.

Spring touches and indicates one end to be provided with carbon slide 10, and its effect is: dust in the second semicircular groove 9 of the expansion joint is removed in the sliding process, so that good contact between the spring contact finger and the expansion joint is ensured; the graphite scraps rubbed off in the sliding process can play a role in lubrication, so that the sliding is smoother. And the spring device is arranged at the upper part of the carbon sliding plate and can apply vertical pressure to the sliding plate in the sliding consumption process of the sliding plate so as to keep the sliding plate in contact with the second semicircular groove.

As shown in fig. 1-2, in order to realize the fixed connection between the expansion joint and the flow-taking device, the first flow-taking device 3 and the first expansion joint 1 are connected by bolts, and a watchband contact finger 11 is arranged between the first flow-taking device and the first expansion joint; the second flow collector 4 and the second expansion joint 2 are connected through bolts, and a watchband contact finger 11 is arranged between the second flow collector and the second expansion joint; the function of the strap fingers 11 is to make a fixed electrical contact.

As shown in fig. 3, in order to ensure smooth sliding between the first expansion joint 1 and the second expansion joint 2, the present invention adopts a sliding groove 12 arranged between the first expansion joint 1 and the second expansion joint 2; a slide block 13 which is positioned in the slide groove 12 and fixed with the first expansion joint 1 or the second expansion joint 2; a chip groove 14, which is opened in the chute 12.

A sliding block is arranged between the first expansion joint and the second expansion joint, the fixed end of the sliding block is made of stainless steel, and the sliding end is made of high polymer materials and is wrapped with a stainless steel body, so that the integral structure of the sliding block has high strength, and the sliding end has good wear resistance and self-lubricating performance, thereby ensuring smooth sliding between the two expansion joints; a plurality of chip grooves are designed on the first expansion joint or the second expansion joint, and dust accumulated in the operation process can be effectively removed.

As shown in fig. 3, the end of the sliding groove 12 is provided with a hollow groove 15; the length of the hollow-out groove 15 is greater than that of the sliding block 13; the slider can be conveniently replaced.

As shown in figure 3, in order to facilitate the replacement of the slide block, the slide block is pulled out, and a pulling bolt 16 is fixed at the end part of the slide block 13.

As shown in FIG. 3, in order to prevent the sliding block from being separated under the condition of effective operation, a limit bolt 17 is arranged in the hollow-out groove 15.

As shown in fig. 3, in order to increase the contact area between the expansion joint and the bus bar, the conductivity is improved; the invention has the characteristics of uniform stress on two sides of the bus bar and torsion resistance, and the end part of the first expansion joint 1 or the second expansion joint 2 is provided with an aluminum cushion block 18 which is contacted with the bus bar.

The invention is a low-clearance lightweight busbar expansion joint, the weight is particularly light, the first expansion joint can slide relative to the second expansion joint, the stable operation of a locomotive is ensured, and the safety and the reliability of the operation of the locomotive are improved; the self structure height of the device is small, the requirement on the clearance is low, and the device can be well applied to a low-clearance tunnel installation environment; in addition, the expansion with heat and contraction with cold that can lead to the system because of temperature variation compensates, guarantees the smooth-going of contact line through restriction expansion joint sag, realizes the reliable contact between anchor segment joint department pantograph and the contact line, guarantees that the pantograph is good to be got the current, promotes the followup nature of pantograph to rigid contact net, improves the pantograph net and receives the current quality.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.