Elastic fixer for installation and construction of embedded channel of tunnel overhead line system
By using elastic fasteners in tunnel construction, the pre-embedded channels of the contact wire were positioned and protected quickly and accurately, solving the problems of low efficiency and difficulty in controlling accuracy in traditional construction, and improving construction quality and schedule control.
Patent Information
- Application Number
- CN202520355000.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-03
AI Technical Summary
In traditional tunnel construction, the positioning and installation of the pre-embedded channels for the overhead contact line are complex, inefficient, and difficult to control in terms of accuracy, which can easily lead to problems such as offset and tilting, making it difficult to guarantee the construction quality.
An elastic fastener consisting of a base, horizontal guide rod, vertical guide rod, slot, spring, and L-shaped reinforcing rod is used. It is welded or tied to the secondary lining steel mesh to achieve rapid fixing and precise positioning of the pre-embedded channel, avoiding the need to drill holes on the secondary lining trolley. The elastic components ensure that the channel is in close contact with the template to prevent displacement.
It improved construction efficiency and installation accuracy, reduced construction errors, protected the anti-corrosion layer of the channel, ensured the accuracy of the embedded channel position and construction quality, and shortened the construction period.
Smart Images
Figure CN223825056U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel pre-embedded channel construction technology; specifically, this utility model relates to an elastic fixing device for the installation and construction of tunnel contact network pre-embedded channel. Background Technology
[0002] In traditional tunnel construction, the pre-embedded contact wire channels are generally installed using the traditional method of opening and positioning on the secondary lining trolley. Construction workers fix and install the channels and grounding in the narrow space between the secondary lining trolley and the secondary lining, and then pour, tam, and demold the concrete to complete the pre-embedded installation of the contact wire channels.
[0003] The traditional pre-embedded channel construction process relies on the length and opening of the secondary lining trolley template for positioning the contact wire channel, which is complex and inefficient. At the same time, due to the limited operating space and difficult construction and installation, the accuracy of the channel pre-embedding and the construction of hidden works such as binding, welding and grounding are difficult to control. Common defects such as tilting, offset and excessive pre-embedding of the pre-embedded channel are prone to occur, which can lead to difficulties in later rectification, high costs and difficulty in controlling the construction period.
[0004] The main quality problems in the construction of embedded channels are as follows: embedded channels are covered with concrete; embedded channels are fixed to the trolley by spot welding, which damages the anti-corrosion layer of the channels; embedded channels are too close to the edge of the opening, which does not meet the design requirements; a set of two embedded channels is buried as a single channel, with one channel missing; the trolley is moved forcibly without removing the T-bolts, causing the embedded channels to be damaged; the distance between the embedded channels and the construction joint does not meet the design requirements; the embedded channels are twisted and deformed, and the concrete surface is honeycomb-like and pitted; the embedded channels are not perpendicular to the center of the line, and are offset as a whole. Utility Model Content
[0005] In view of this, the present invention provides an elastic fastener for the installation of pre-embedded channels for tunnel contact networks, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.
[0006] To achieve the aforementioned objectives, this utility model provides an elastic fastener for the installation of pre-embedded channels in tunnel contact networks, comprising a base, a horizontal guide rod, a vertical guide rod, a slot, a spring, and an L-shaped reinforcing rod. The horizontal guide rod is slidably mounted on the base laterally, and the vertical guide rod is slidably mounted on the base vertically. The slot is fixedly mounted on the bottom end of the vertical guide rod. The spring is sleeved on the outside of the vertical guide rod and is located between the base and the slot. The L-shaped reinforcing rod is fixedly mounted on the top of the slot and is arranged parallel to the vertical guide rod.
[0007] In the aforementioned elastic fastener for the installation of pre-embedded channels in tunnel contact networks, optionally, the L-shaped reinforcing rod includes a smooth rod portion, a screw portion, and a top sleeve. The smooth rod portion has an "L"-shaped structure, the transverse section of the smooth rod portion is fixedly connected to the top surface of the slot, the screw portion is fixedly installed at the top end of the longitudinal section of the smooth rod portion, and the top sleeve is threaded onto the top end of the screw portion.
[0008] In the aforementioned elastic fastener for the installation of pre-embedded channels in tunnel contact networks, optionally, a limiting rod is fixedly provided in the middle of the screw portion. The limiting rod is U-shaped and is arranged parallel to the horizontal guide rod. One end of the limiting rod is fixedly connected to the screw portion, and the other end of the limiting rod is threaded with a set screw. The set screw is perpendicular to the limiting rod and is directly opposite the axis of the vertical guide rod.
[0009] In the aforementioned elastic fixing device for the installation of pre-embedded channels in tunnel contact networks, optionally, clamping nuts are provided on both the upper and lower sides of the limiting rod, and the clamping nuts are threaded onto the screw rod portion.
[0010] In the aforementioned elastic fastener for the installation of pre-embedded channels in tunnel contact networks, optionally, two pressure rings are movably sleeved on the screw portion, with the two pressure rings located on the side of the two clamping nuts away from the limiting rod.
[0011] In the aforementioned elastic fastener for the installation of pre-embedded channels in tunnel contact networks, optionally, a stop bar is vertically installed on the side of the pressure ring, the two stop bars extend in opposite directions, and the outer diameter of the top sleeve, the outer diameter of the pressure ring, and the outer diameter of the smooth rod portion are the same, and the stop bar is tangent to the pressure ring.
[0012] This utility model provides an elastic fixing device for the installation of pre-embedded channels in tunnel contact networks, which has at least the following beneficial effects:
[0013] 1. By directly welding or binding the pre-embedded channels to the secondary lining steel mesh using elastic fasteners, no holes need to be drilled on the tunnel secondary lining trolley, which will not damage the tunnel secondary lining trolley. The welding or binding method can quickly fix the channels to the steel mesh. The assembly line operation does not occupy the construction time of the secondary lining trolley, improving the construction efficiency and the accuracy of the installation position, greatly improving the construction quality and shortening the construction period.
[0014] 2. The elastic fastener assembly is pre-fixed to the pre-embedded channel and directly and firmly fixed to the secondary lining steel mesh. The installation can be completed before the tunnel secondary lining trolley is in place, which provides enough space and time to check whether the model and technical requirements of the pre-embedded channel and the installation position are accurate.
[0015] 3. The compression setting of the spring ensures that the pre-embedded channel is always in close contact with the trolley template, which will not cause the pre-embedded channel to be buried too deep or too shallow, and will not cause the common construction problems of channel deviation, tilting, and spacing not meeting the design requirements caused by the cement grouting of the tunnel secondary lining.
[0016] 4. The snap-fit design of the elastic fixing assembly prevents direct spot welding or T-bolt fixation of the pre-embedded channel to the tunnel secondary lining trolley template. Forced demolding during demolding would damage the galvanized anti-corrosion layer of the pre-embedded channel, causing rust and corrosion and affecting its service life. This effectively protects the surface of the pre-embedded contact wire channel.
[0017] 5. By directly welding or binding the pre-embedded channels to the secondary lining steel mesh with elastic fasteners, the assembly line operation allows for sufficient time and space, enabling 100% self-inspection and re-inspection, and reducing the likelihood of errors. Attached Figure Description
[0018] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:
[0019] Figure 1 This is a structural schematic diagram of the elastic fixing device for the installation of the pre-embedded channel of the tunnel contact network according to this utility model.
[0020] Figure 2 This utility model Figure 1 Enlarged view of point A in the image.
[0021] Reference numerals in the attached diagram: 1. Base; 2. Horizontal guide rod; 3. Vertical guide rod; 4. Slot; 5. Spring; 6. L-shaped reinforcing rod; 6.1. Smooth rod part; 6.2. Screw part; 6.3. Top sleeve; 7. Limiting rod; 8. Top screw; 9. Compression nut; 10. Pressure ring; 11. Stop bar. Detailed Implementation
[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] like Figure 1 and Figure 2As shown, this embodiment provides an elastic fastener for the installation of pre-embedded channels in tunnel contact networks, including a base 1, a horizontal guide rod 2, a vertical guide rod 3, a slot 4, a spring 5, and an L-shaped reinforcing rod 6. The horizontal guide rod 2 is slidably mounted on the base 1 in the horizontal direction, the vertical guide rod 3 is slidably mounted on the base 1 in the vertical direction, the slot 4 is fixedly mounted on the bottom end of the vertical guide rod 3, the spring 5 is sleeved on the outside of the vertical guide rod 3 and is located between the base 1 and the slot 4, and the L-shaped reinforcing rod 6 is fixedly mounted on the top of the slot 4 and is arranged parallel to the vertical guide rod 3.
[0024] The slot 4 effectively ensures that the lower part of the elastic retainer is locked in the channel along the length of the channel. By sliding and binding the slot 4, the lateral position on the channel is locked. The longitudinal fixation is controlled by the vertical guide rod 3 and the horizontal guide rod 2. By adjusting the horizontal guide rod 2, it can be better welded to the secondary lining steel mesh. The horizontal guide rod 2 is designed as a plain round steel bar, which can better weld to the secondary lining steel mesh. The position of the pre-embedded channel is finely adjusted by the slot 4 and the horizontal guide rod 2 to ensure the installation position of the pre-embedded channel.
[0025] The base 1 and spring 5 form an upper and lower elastic device. After the secondary lining template trolley is in place, the trolley template is opened, and spring 5 is compressed. The elastic force makes the channel and the top plate of the trolley template fit tightly. This eliminates the movement of the pre-embedded channel caused by the secondary lining grouting process. At the same time, since there is no need to drill holes on the trolley, the position of the vibrator can be arranged more reasonably, reducing the phenomenon of surface pitting and hollowing of concrete.
[0026] The L-shaped reinforcing rod 6 is tied to the channel anchor rod to ensure effective fixation. At the same time, during prefabrication, the L-shaped reinforcing rod 6 is reserved for a certain length, and the hot-dip galvanized steel strand grounding wire is connected by a nut. During the construction of the pre-embedded channel, the grounding flexible wire can complete the grounding installation more flexibly and conveniently.
[0027] The L-shaped reinforcing rod 6 includes a smooth rod part 6.1, a screw part 6.2, and a top sleeve 6.3. The smooth rod part 6.1 has an "L" shaped structure. The transverse section of the smooth rod part 6.1 is fixedly connected to the top surface of the slot 4. The screw part 6.2 is fixedly installed at the top end of the longitudinal section of the smooth rod part 6.1. The top sleeve 6.3 is threaded onto the top end of the screw part 6.2.
[0028] By rotating the top sleeve 6.3, the top sleeve 6.3 is displaced on the screw part 6.2, so that the top sleeve 6.3 can abut against the lower surface of the top of the channel anchor rod, thereby better pressing the slot 4 against the channel and improving the positioning effect of the channel.
[0029] A limiting rod 7 is fixedly installed in the middle of the screw part 6.2. The limiting rod 7 is U-shaped and is set parallel to the horizontal guide rod 2. One end of the limiting rod 7 is fixedly connected to the screw part 6.2, and the other end of the limiting rod 7 is threaded with a set screw 8. The set screw 8 is perpendicular to the limiting rod 7 and is directly opposite the axis of the vertical guide rod 3.
[0030] When the slot 4 is installed in the channel, the set screw 8 is facing the side of the channel anchor rod away from the screw part 6.2. At this time, by rotating the set screw 8, the set screw 8 is pressed against the channel anchor rod. Then, the top sleeve 6.3 and the screw part 6.2, together with the set screw 8, clamp and fix the channel anchor rod from both sides to improve the positioning effect of the channel.
[0031] Both the upper and lower sides of the limiting rod 7 are equipped with clamping nuts 9, which are threaded onto the screw rod portion 6.2. In actual operation, after the screw rod portion 6.2 and the channel anchor rod are tied with wire, the clamping nuts 9 are rotated so that the clamping nut 9 located below the top sleeve 6.3 works with the top sleeve 6.3 to clamp and fix one binding wire, while the clamping nut 9 located above the smooth rod portion 6.1 works with the smooth rod portion 6.1 to clamp and fix the other binding wire. This improves the tying stability and enhances the positioning effect of the channel.
[0032] Two pressure rings 10 are movably sleeved on the screw section 6.2, and the two pressure rings 10 are respectively located on the side of the two clamping nuts 9 away from the limiting rod 7. When the clamping nuts 9 tighten the binding wire, the pressure rings 10 replace the clamping nuts 9 to directly contact the binding wire, thereby preventing the binding wire from shifting and improving the binding effect.
[0033] A stop bar 11 is vertically mounted on the side of the pressure ring 10. The two stop bars extend in opposite directions, and the outer diameters of the top sleeve 6.3, the pressure ring 10, and the smooth rod portion 6.1 are the same. The stop bars are tangential to the pressure ring 10. By rotating the clamping nut 9, the pressure ring 10 is displaced. During the upward displacement of the upper pressure ring 10, the top end of the stop bar moves to the side of the top sleeve 6.3, while during the downward displacement of the lower pressure ring 10, the bottom end of the stop bar moves to the side of the smooth rod portion 6.1. At this time, during the process of rotating the clamping nut 9 to tighten the binding wire, the stop bar 11 can limit the binding wire and prevent it from detaching. In addition, by pushing the stop bar, the stop bar and the pressure ring 10 rotate as a whole around the center of the pressure ring 10, which can tighten the part of the binding wire outside the screw portion 6.2, making the binding wire better adhere to the screw portion 6.2, further improving the stability of the binding wire and improving the positioning effect of the channel.
[0034] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.
Claims
1. An elastic fastener for installing pre-embedded channels in tunnel contact networks, characterized in that, The device includes a base (1), a horizontal guide rod (2), a vertical guide rod (3), a slot (4), a spring (5), and an L-shaped reinforcing rod (6). The horizontal guide rod (2) is slidably mounted on the base (1) in the horizontal direction. The vertical guide rod (3) is slidably mounted on the base (1) in the vertical direction. The slot (4) is fixedly mounted on the bottom end of the vertical guide rod (3). The spring (5) is sleeved on the outside of the vertical guide rod (3) and is located between the base (1) and the slot (4). The L-shaped reinforcing rod (6) is fixedly mounted on the top of the slot (4) and is arranged parallel to the vertical guide rod (3).
2. The elastic fixing device for the installation of pre-embedded channels in tunnel contact networks as described in claim 1, characterized in that, The L-shaped reinforcing rod (6) includes a smooth rod part (6.1), a screw part (6.2), and a top sleeve (6.3). The smooth rod part (6.1) has an "L" shaped structure. The transverse section of the smooth rod part (6.1) is fixedly connected to the top surface of the slot (4). The screw part (6.2) is fixedly installed at the top end of the longitudinal section of the smooth rod part (6.1). The top sleeve (6.3) is threaded onto the top end of the screw part (6.2).
3. The elastic fixing device for the installation of pre-embedded channels in tunnel contact networks as described in claim 2, characterized in that, A limiting rod (7) is fixedly installed in the middle of the screw part (6.2). The limiting rod (7) is U-shaped and is set parallel to the horizontal guide rod (2). One end of the limiting rod (7) is fixedly connected to the screw part (6.2), and the other end of the limiting rod (7) is threaded with a set screw (8). The set screw (8) is perpendicular to the limiting rod (7) and is directly opposite the axis of the vertical guide rod (3).
4. The elastic fixing device for the installation of pre-embedded channels in tunnel contact networks as described in claim 2, characterized in that, The limiting rod (7) is provided with clamping nuts (9) on both the upper and lower sides, and the clamping nuts (9) are threaded onto the screw part (6.2).
5. The elastic fixing device for the installation of pre-embedded channels in tunnel contact networks as described in claim 4, characterized in that, Two pressure rings (10) are movably sleeved on the screw part (6.2), and the two pressure rings (10) are respectively located on the side of the two clamping nuts (9) away from the limiting rod (7).
6. The elastic fixing device for installing pre-embedded channels of tunnel contact networks as described in claim 5, characterized in that, A stop bar (11) is vertically mounted on the side of the pressure ring (10). The two stop bars extend in opposite directions, and the outer diameter of the top sleeve (6.3), the outer diameter of the pressure ring (10), and the outer diameter of the smooth rod part (6.1) are the same. The stop bar is tangent to the pressure ring (10).