Tunnel embedded channel anti-falling anchor point device

Abstract

The invention discloses a tunnel pre-buried channel anti-falling anchor point device, and aims to solve the problems of insufficient hanging points of existing tunnel high-place operation and poor anti-falling safety and stability of the device. The device comprises a T-shaped bolt, a bolt pin, a spring, a threaded sleeve, a fastener and a hanging ring, and the T-shaped bolt comprises a clamping block and a connecting rod; the clamping part of the clamping block is matched with a chute in the bottom of the embedded channel, the bolt pin is embedded in a first mounting hole of the T-shaped bolt after being sleeved with the spring, the threaded sleeve limits a boss of the bolt pin, the groove bottom is clamped between the clamping block and the bolt pin through the fastener, and the hanging ring is fixed to the connecting rod through the pin and used for hanging a safety belt. Anchor points do not need to be additionally arranged, reliable bearing is achieved through multiple stable structures, assembly is convenient and fast, stress is stable, the falling risk of high-place operation can be effectively reduced, and the device is suitable for tunnel construction and catenary maintenance scenes.

Description

Technical Field

[0001] This invention relates to the field of overhead contact line technology for rail transit, and specifically to a device for preventing falls in tunnel pre-embedded channels. Background Technology

[0002] During tunnel construction and overhead contact line operation and maintenance, workers at heights need to be protected from falls by fastening safety belts. Currently, the industry commonly uses three types of fastening points: dedicated fall arrest anchors, permanent load-bearing structures, and mobile high-altitude work platforms. However, there are many practical problems in actual work scenarios: on the one hand, the lack of pre-set dedicated fall arrest anchors and the difficulty in finding suitable load-bearing structures result in a lack of effective fastening foundations for safety belts; on the other hand, mobile high-altitude work platforms themselves have weak stability and the safety hazard of tipping over, failing to provide reliable protective support for workers. From the perspective of the device itself, the fall safety stability of the device during and after installation is quite important. Summary of the Invention

[0003] The technical problem to be solved by this invention is that, in order to address the issues that, in existing technologies for working at heights in tunnels, there are no pre-set dedicated anti-fall anchor points and it is difficult to find suitable load-bearing structures, resulting in a lack of effective anchoring bases for safety belts; on the other hand, mobile high-altitude work platforms themselves have weak stability and the safety hazard of tipping over, failing to provide reliable protective support for construction workers. Therefore, this invention provides a tunnel pre-embedded channel anti-fall anchor point device.

[0004] The technical solution adopted by this invention to solve its technical problem is: a tunnel pre-embedded channel anti-fall anchor point device, including a T-bolt, the T-bolt including a locking block and a connecting rod, the locking block having locking parts on both sides adapted to the inclined groove of the bottom of the pre-embedded channel, the connecting rod being fitted with a fastener, the locking block being elastically mounted with a bolt pin, the bolt pin protruding upward from the locking block, and a lifting ring being installed below the connecting rod; the locking block and the bottom of the channel are both located between the bolt pin and the fastener, and the bolt pin is configured to provide elastic resistance when the locking part disengages from the inclined groove of the bottom of the channel.

[0005] Furthermore, the fastener is configured to be threadedly connected to the connecting rod.

[0006] Furthermore, the fastener is a clamp, which is attached to the connecting rod.

[0007] Furthermore, when the snap-fit ​​part is fully embedded in the inclined groove, the bolt pin abuts against the top of the pre-embedded groove or leaves a gap with the top of the groove.

[0008] Furthermore, the locking block is provided with a first coaxial mounting hole communicating with the connecting rod, and the bolt pin is provided with a boss in the middle, the boss being fitted into the first mounting hole; a spring is sleeved below the boss, one end of the spring abutting against the boss and the other end abutting against the bottom of the first mounting hole; a threaded sleeve is threadedly connected to the locking block, the part of the bolt pin located above the boss passing through the threaded sleeve and slidingly connected with the threaded sleeve, and the upper end face of the boss abutting against the threaded sleeve.

[0009] Furthermore, the connecting rod has a pin hole, and the top of the lifting ring has a second mounting hole and a third mounting hole. The lifting ring is sleeved on the connecting rod through the second mounting hole, and the third mounting hole and the pin hole are fixed by a pin. The connecting rod passes through the slot opening, the fastener and the second mounting hole in sequence.

[0010] Furthermore, when the lifting ring is a circular ring, the fastener is a nut that is compatible with the thread of the connecting rod.

[0011] Furthermore, when the lifting ring has a trapezoidal hollow structure, the fastener is a clamp.

[0012] Furthermore, the outer circumferential surface of the threaded sleeve is provided with a thread that matches the first mounting hole, and its interior is smooth and without threads.

[0013] Furthermore, the outer diameter of the threaded sleeve is larger than the outer diameter of the boss.

[0014] The beneficial effects of this invention are: The T-bolt of this invention has a locking block that fits into the inclined groove at the bottom of the pre-embedded channel through a locking part. When fasteners are tightened, the bolt pin protrudes upward from the locking block, forming a multi-layered stable structure. During the fastener installation process, when the locking part is about to disengage from the inclined groove, the bolt pin is pulled up and abuts against the top of the groove, generating elastic resistance. Greater force is required to overcome the elastic resistance before the locking part can disengage from the inclined groove. This avoids safety hazards during the fastener tightening process, provides continuous and reliable protective support for construction personnel, and significantly reduces the risk of falls. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is the front view of a tunnel pre-embedded channel anti-fall anchor point device with a circular lifting ring; Figure 2 This is a three-dimensional schematic diagram of a tunnel pre-embedded channel anti-fall anchor point device with a trapezoidal hollow structure lifting ring; Figure 3 This is a longitudinal section view of a tunnel pre-embedded channel anti-fall anchor point device with a circular lifting ring; Figure 4This is a longitudinal section view of a tunnel pre-embedded channel anti-fall anchor point device with a trapezoidal hollow structure lifting ring; Figure 5 This is the front view of the T-bolt; Figure 6 This is a top view of a T-bolt; Figure 7 This is the main view of the pre-embedded channel; Figure 8 This is a 3D schematic diagram of the bolt pin; Figure 9 This is a three-dimensional schematic diagram of a threaded sleeve; Figure 10 This is a three-dimensional schematic diagram of the lifting ring having a trapezoidal hollow structure; Figure 11 This is the front view of the hoop, which has a trapezoidal hollow structure. Figure 12 This is a 3D schematic diagram of the rings being circular. Figure 13 This is a top view of the front clamp; Figure 14 This is a top view of the rear clamp; Figure 15 This is a 3D schematic diagram of one side of the rear clamp; Figure 16 This is a 3D schematic diagram of the other side of the rear clamp; Figure 17 This is a 3D schematic diagram of one side of the front clamp; Figure 18 This is a 3D schematic diagram of the other side of the front clamp; In the picture: 1. T-bolt; 11. Clamping block; 111. Clamping part; 12. Connecting rod; 121. Pin hole; 122. First mounting hole; 2. Bolt pin; 21. Boss; 3. Threaded sleeve; 4. Fasteners: 41. Front clamp; 42. Rear clamp; 5. Lifting ring; 51. Second mounting hole; 52. Third mounting hole; 6. Tank bottom; 61. Inclined trough; 62. Tank opening; 7. Spring; 8. Top of the trench. Detailed Implementation

[0017] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0018] like Figure 1 and Figure 2 As shown, a tunnel pre-embedded channel anti-fall anchor point device includes a T-bolt 1. The T-bolt 1 includes a locking block 11 and a connecting rod 12. The locking block 11 has locking portions 111 on both sides that are adapted to the inclined grooves 61 of the bottom 6 of the pre-embedded channel. The locking portions 111 are completely fitted with the inclined grooves 61 of the bottom 6 of the pre-embedded channel to avoid gaps after installation that could cause shaking. A fastener 4 is fitted on the connecting rod 12. A bolt pin 2 is elastically installed on the locking block 11, and the bolt pin 2 protrudes upward from the locking block 11. Below the connecting rod 12 The device is equipped with lifting rings 5. When construction workers are working at height, they can connect the buckles of their safety belts to the lifting rings 5 ​​of the fall arrestor fixed to the two side channels. The locking block 11 and the bottom of the channel 6 are both located between the bolt pin 2 and the fastener 4. The bolt pin 2 is configured to provide elastic resistance when the locking part 111 is disengaged from the inclined groove 61 of the bottom of the channel 6.

[0019] In some examples, such as Figure 5 , Figure 6 , Figure 7 As shown, when the snap-fit ​​part 111 is fully embedded in the inclined groove 61, the bolt pin 2 abuts against the top of the groove 8 of the pre-embedded channel or leaves a gap with the top of the groove 8. During the installation of the fastener 4, when the snap-fit ​​part 111 is about to disengage from the inclined groove 61, the bolt pin 2 is pulled up and abuts against the top of the groove 8, generating elastic resistance. It is necessary to apply a greater force to overcome the elastic resistance before the snap-fit ​​part 111 can disengage from the inclined groove 61.

[0020] In some examples, such as Figure 3 and Figure 4As shown, the locking block 11 is provided with a coaxial first mounting hole 122 communicating with the connecting rod 12. The bolt pin 2 is provided with a boss 21 in the middle, and the boss 21 is embedded in the first mounting hole 122. A spring 7 is sleeved below the boss 21. One end of the spring 7 abuts against the boss 21 and the other end abuts against the bottom of the first mounting hole 122. In its natural state, the spring 7 applies a downward preload to the boss 21, causing the locking part 111 of the T-bolt 1 to always fit against the groove bottom 6 inclined groove 61. Even if subjected to slight vibration or lateral force, it can maintain the fitting state through the elastic reset of the spring 7, preventing the device from shifting. A threaded sleeve 3 is threadedly connected to the locking block 11. The part of the bolt pin 2 located above the boss 21 passes through the threaded sleeve 3 and is slidably connected to the threaded sleeve 3. The upper end face of the boss 21 abuts against the threaded sleeve 3. The threaded sleeve 3 is used to abut against and limit the boss 21 to prevent the T-bolt 1 from coming out.

[0021] In some examples, such as Figure 12 As shown, when the lifting ring 5 is a circular ring, the fastener 4 is a nut and is adapted to the thread of the connecting rod 12. When the fastener 4 is a nut, the fastener 4 is configured to be threadedly connected to the connecting rod 12.

[0022] In some examples, such as Figure 10 , Figure 11 As shown, when the lifting ring 5 is a trapezoidal hollow structure, the fastener 4 is a clamp. The lifting ring 5 is similar to a bus handle and is used when a person needs to hold it with leverage. The clamp is attached to the connecting rod 12. The clamp can be designed with elastic buckles. As long as the height is appropriate, it can also prevent the T-head bolt from coming out, making the installation flexible.

[0023] In some examples, such as Figure 3 and Figure 4 As shown, the connecting rod 12 has a pin hole 121, and the top of the lifting ring 5 has a second mounting hole 51 and a third mounting hole 52. The lifting ring 5 is sleeved on the connecting rod 12 through the second mounting hole 51. The thread of the second mounting hole 51 is adapted to the thread on the outer circumferential surface of the connecting rod 12. The third mounting hole 52 and the pin hole 121 are fixed by a pin. The connecting rod 12 passes through the slot opening 62, the fastener 4 and the second mounting hole 51 in sequence. The lifting ring 5 is double-fixed by the thread of the second mounting hole 51 being adapted to the thread on the outer circumferential surface of the connecting rod 12 and the pin, which prevents loosening and falling off and ensures reliable load-bearing of the safety belt.

[0024] In some examples, such as Figure 3 , Figure 4 , Figure 8 and Figure 9As shown, the outer diameter of the threaded sleeve 3 is larger than the outer diameter of the boss 21. When the bolt pin 2 is subjected to an upward pulling force, the boss 21 will be blocked by the bottom of the threaded sleeve 3 and will not be able to come out of the first mounting hole 122, thus achieving the anti-loosening function.

[0025] Specific installation method and working principle: Assemble the spring 7, bolt pin 2, and threaded sleeve 3 sequentially into the first mounting hole 122 of the T-bolt 1. Using the handheld device, align the T-bolt 1 and the locking block 11 with the pre-embedded groove opening 62. Push the connecting rod 12 upwards, then rotate the locking block 11 so that its locking part 111 fits against the inclined groove 61 of the groove bottom 6. After releasing, the upward-pushed part falls back into position. Depending on the type of lifting ring 5, tighten the nut or clamp onto the connecting rod 12. If a clamp is used, such as... Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 As shown, the front clamp 41 and the rear clamp 42 need to be connected and fixed so that the bottom of the groove 6 is clamped between the card block 11 and the fastener 4. Then, the corresponding lifting ring 5 is put on through the second mounting hole 51, and the lifting ring 5 and the connecting rod 12 are fixed with pins. Pull the lifting ring 5 lightly to confirm that the device is stable, test the safety belt buckle connection, and the installation is completed. This invention directly utilizes pre-embedded channels in the tunnel wall for fixed installation, eliminating the need for additional dedicated fall arrest points. This effectively solves the problem of insufficient safety belt anchorage due to the lack of pre-installed dedicated fall arrest points and the difficulty in finding suitable load-bearing structures. It is suitable for various high-altitude work scenarios in tunnel construction and overhead contact line operation and maintenance. The device uses the tunnel's pre-embedded channels as the installation base. The T-bolt 1's locking block 11 is fitted with the inclined groove 61 at the bottom of the pre-embedded channel via the locking part 111. With the fastener 4 tightened, the bolt pin 2 protrudes upwards from the locking block 11, forming a multi-layered stable structure. This ensures the fastener 4 is installed correctly. During the process, when the locking part 111 is about to disengage from the inclined groove 61, the bolt pin 2 is pulled up and abuts against the top of the groove 8, generating elastic resistance. Greater force is required to overcome the elastic resistance before the locking part 111 can disengage from the inclined groove 61. This avoids the safety hazards during the fastener 4 locking process and provides continuous and reliable protective support for construction personnel, significantly reducing the risk of falling. The lifting ring 5 is fixed to the T-bolt 1 via a pin. When construction personnel are working at height, they can connect the buckles of their safety belts to the lifting ring 5 on the left and right, transferring the human load to the T-bolt 1 and the pre-embedded groove in sequence, avoiding the risks of the mobile platform and achieving reliable fall prevention.

[0026] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A device for preventing falls in tunnel pre-embedded channels, characterized in that: The device includes a T-bolt (1), which includes a locking block (11) and a connecting rod (12). The locking block (11) has locking parts (111) on both sides that are adapted to the inclined groove (61) of the bottom (6) of the pre-embedded channel. The connecting rod (12) is fitted with a fastener (4). The locking block (11) is elastically mounted with a bolt pin (2). The bolt pin (2) protrudes upward from the locking block (11). A lifting ring (5) is installed below the connecting rod (12). The locking block (11) and the bottom (6) of the channel are both located between the bolt pin (2) and the fastener (4). The bolt pin (2) is configured to provide elastic resistance when the locking part (111) disengages from the inclined groove (61) of the bottom (6).

2. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: The fastener (4) is configured to be threaded to the connecting rod (12).

3. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: The fastener (4) is a clamp, which is attached to the connecting rod (12).

4. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: When the snap-fit ​​part (111) is fully embedded in the inclined groove (61), the bolt pin (2) abuts against the top of the pre-embedded channel (8) or leaves a gap with the top of the channel (8).

5. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: The locking block (11) is provided with a first mounting hole (122) coaxial with the connecting rod (12). The bolt pin (2) is provided with a boss (21) in the middle. The boss (21) is embedded in the first mounting hole (122). A spring (7) is sleeved below the boss (21). One end of the spring (7) abuts against the boss (21) and the other end abuts against the bottom of the first mounting hole (122). A threaded sleeve (3) is threadedly connected to the locking block (11). The part of the bolt pin (2) above the boss (21) passes through the threaded sleeve (3) and is slidably connected to the threaded sleeve (3). The upper end face of the boss (21) abuts against the threaded sleeve (3).

6. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: The connecting rod (12) has a pin hole (121), and the top of the lifting ring (5) has a second mounting hole (51) and a third mounting hole (52). The lifting ring (5) is sleeved on the connecting rod (12) through the second mounting hole (51), and the third mounting hole (52) and the pin hole (121) are fixed by a pin. The connecting rod (12) passes through the slot opening (62), the fastener (4) and the second mounting hole (51) in sequence.

7. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: When the lifting ring (5) is a circular ring, the fastener (4) is a nut and is compatible with the thread of the connecting rod (12).

8. The anti-fall anchor point device for tunnel pre-embedded channels according to claim 1, characterized in that: When the lifting ring (5) is a trapezoidal hollow structure, the fastener (4) is a clamp.

9. A tunnel pre-embedded channel anti-fall anchor point device according to claim 5, characterized in that: The outer diameter of the threaded sleeve (3) is greater than the outer diameter of the boss (21).

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