A TBM inclined shaft ladder folding guardrail device

Abstract

A TBM inclined shaft ladder can be folded guardrail device belongs to the technical field of water conservancy and hydropower engineering construction, including the lower cross bar, the lower cross bar is fixed to the tunnel rock surface along the length direction of the tunnel, the lower cross bar is uniformly hinged with several bars along its length direction, one end of the bar is fixedly connected with the support plate, the support plate is arranged on the side facing the opening, the other end of the bar is connected with a steel wire rope, the other end of the steel wire rope is connected with the winch after extending out of the opening. In the utility model, when the steel pipe is put down, the guardrail can be folded, so that the guardrail does not affect the steel pipe put down, when the steel pipe is put down, the guardrail is erected by the winch pulling the steel wire rope, the safety of personnel up and down is guaranteed, the problem that there is no guardrail in the TBM inclined shaft ladder is solved, so that the construction safety is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of water conservancy and hydropower engineering construction, and relates to the technical field of installation of guardrails for the inclined shaft ladder of pumped storage power stations (TBMs), and in particular to a foldable guardrail device for the inclined shaft ladder of a TBM. Background Technology

[0002] With the development and increasing demand for energy storage technology, the scale and number of pumped storage power stations are constantly expanding. The construction of pumped storage power stations typically requires the construction of inclined shaft tunnels, and current construction techniques often employ TBM systems to excavate these inclined shaft tunnels, depending on geological conditions.

[0003] The inclined shaft tunnels excavated by TBM systems have a circular cross-section and limited bottom space. Installing guardrails would interfere with the chuting and installation of steel pipes. Furthermore, due to the circular cross-section, the distance between the two tunnel walls is significant, making it impossible to install steel cables on the walls. Therefore, to address the safety concerns of personnel moving up and down, this utility model design presents a foldable guardrail device for the TBM inclined shaft ladder. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a foldable guardrail device for the TBM inclined shaft ladder, which solves the technical problem that the limited space in the circular cross-section of the TBM inclined shaft makes it impossible to install ladder railings, resulting in significant safety hazards for personnel going up and down.

[0005] To achieve the above and other related objectives, this utility model provides a foldable guardrail device for a TBM inclined shaft ladder, including a lower crossbar. The lower crossbar is fixed to the tunnel rock surface along the length of the tunnel. Several guardrails are evenly hinged to the lower crossbar along its length. A support plate is fixedly connected to one end of each guardrail and the lower crossbar. The support plate is located on the side facing the tunnel entrance. A steel wire rope is connected to the other end of each guardrail. The other end of the steel wire rope extends out of the tunnel entrance and is connected to a winch.

[0006] Preferably, in any of the above embodiments, the lower crossbar is fixedly connected to the tunnel rock surface by expansion bolts.

[0007] In any of the above embodiments, it is preferred that the lower crossbar is a channel steel, and the railing is set in the groove of the lower crossbar and hinged to the lower crossbar by a pin.

[0008] Preferably, in any of the above embodiments, the end of the railing located inside the channel steel is set in an arc shape.

[0009] Preferably, in any of the above embodiments, the support plate is a right-angled triangular plate, with one right-angled side of the support plate welded to the side wall of the railing, and the other right-angled side of the support plate collinear with the bottom of the railing.

[0010] In any of the above embodiments, it is preferred that each of the above railings has a rope hole at its suspended end, and the steel wire rope passes through the rope hole and is connected to the railing. The center of each rope hole is equidistant from the end of the railing where it is located.

[0011] Preferably, in any of the above embodiments, rope buckles are installed on both sides of each railing to fix the wire rope to the railing.

[0012] As described above, the foldable guardrail device for the TBM inclined shaft climbing ladder of this utility model has the following beneficial effects:

[0013] 1. In this utility model, the railing can be folded when the steel pipe is being lowered to avoid the railing affecting the lowering of the steel pipe. After the steel pipe is lowered, the railing is erected by pulling the wire rope with a winch to ensure the safety of personnel going up and down. This effectively solves the problem of no railing on the ladder in the TBM inclined shaft, thereby improving construction safety.

[0014] 2. In this utility model, the entire device has a simple structure, is easy to construct and operate, and is highly safe. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of this utility model.

[0016] Figure 2 The image shown is a side view of the railing in this utility model.

[0017] Figure 3 Displayed as Figure 1 Enlarged diagram of point A in the middle.

[0018] Component designation explanation

[0019] 1-Guardrail; 2-Lower crossbar; 3-Wire rope; 4-Rope buckle; 5-Support plate; 6-Expansion bolt; 7-Winder. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0021] Please see Figures 1 to 3It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0022] Please see Figure 1-3 This utility model provides a foldable guardrail device for a TBM inclined shaft climbing ladder, including a lower horizontal bar 2, which is fixed to the tunnel rock surface along the length of the tunnel. Several guardrails 1 are evenly hinged on the lower horizontal bar 2 along its length. A support plate 5 is fixedly connected to one end of the guardrail 1 and the lower horizontal bar 2. The support plate 5 is set on the side facing the tunnel entrance. A steel wire rope 3 is connected to the other end of the guardrail 1. The other end of the steel wire rope 3 extends out of the tunnel entrance and is connected to a winch 7.

[0023] In this embodiment, to address the technical problem of lack of safety protection for personnel moving up and down inclined shafts in existing TBM systems, a foldable guardrail device for TBM inclined shaft ladders is proposed. This device includes a lower horizontal bar 2, which is fixed to the tunnel rock surface along the inclined direction of the TBM shaft using expansion bolts 6. Several guardrails 1 are hinged along the length of the lower horizontal bar 2 using pins. The upper ends of the guardrails 1 are connected to a common steel wire rope 3, which is moved up and down by a winch 7. When steel pipes need to be lowered, the winch 7 is released, causing the steel wire rope 3 to lengthen while the guardrails 1 rotate around the pins and fold downwards, avoiding interference with the lowering of the steel pipes. After the steel pipes have been lowered, the winch 7 shortens the steel wire rope 3, pulling the guardrails 1 upwards until they are perpendicular to the lower horizontal bar 2, thus acting as a guardrail and ensuring the safety of personnel moving up and down, thereby improving the operational safety of workers.

[0024] In this embodiment, in order to ensure the stability of the guardrail during the protective process, a support plate 5 is welded and fixed on the bottom side of the guardrail 1 facing the winch 7. When the winch 7 pulls the wire rope 3 to make the guardrail 1 stand up, the support plate 5 supports the guardrail 1.

[0025] In this embodiment, the lower crossbar 2 is a channel steel, and the railing 1 is set in the channel steel. The width of the railing 1 is smaller than the width of the channel steel, thereby ensuring that the railing 1 will not come into contact with the side walls of the channel steel during rotation, reducing the force required to rotate the railing 1 while reducing friction loss and extending the service life of the device.

[0026] In this embodiment, two bolt holes are provided on the lower crossbar 2 at 500mm intervals. The expansion bolts 6 pass through the bolt holes to fix the lower crossbar 2 to the rock surface of the inclined shaft. Of course, the spacing between adjacent bolt holes is not limited to 500mm and can be adjusted according to the actual construction situation, such as 400mm, 600mm, etc.

[0027] In this embodiment, the railing 1 is made of aluminum alloy square steel.

[0028] In this embodiment, the hinge connection method of the railing 1 to the lower crossbar 2 via a pin includes the following two types: 1. A pin passes through the lower end of railing 1 and is fixedly connected to railing 1. The two ends of the pin after passing through railing 1 pass through both sides of the channel steel and are rotatably connected to the two side walls of the channel steel. Alternatively, a pin can be fixedly connected to each side of railing 1, with the two pins passing through both sides of the channel steel and rotatably connected to the two side walls of the channel steel.

[0029] To reduce the friction between the pin and the side wall of the channel steel during rotation, a bearing is installed at the penetration point of the pin on the side wall of the channel steel, and the pin is connected to the two side walls of the channel steel through the bearing.

[0030] 2. A pin passes through the lower end of railing 1 and is rotatably connected to railing 1. The two ends of the pin after passing through railing 1 are respectively fixedly connected to the two side walls of the channel steel.

[0031] As a further description of the above embodiment, in order to prevent the bottom of the railing 1 from contacting the lower crossbar 2 and getting stuck during the rotation of the railing 1, in this embodiment, the end of the railing 1 located inside the channel steel is set to be arc-shaped.

[0032] As a further description of the above embodiment, in order to ensure the stability of the support plate 5, the support plate 5 is set as a right-angled triangular plate in this embodiment. One right-angled side of the support plate 5 is welded to the side wall of the railing 1, and the other right-angled side of the support plate 5 is on the same straight line as the bottom of the railing 1. This ensures that when the support plate 5 is playing a supporting role, the other right-angled side is in contact with the bottom of the lower crossbar 2, thereby improving the support stability and further improving the safety of the device during use.

[0033] In this embodiment, to further ensure the supporting effect of the support plate 5, at least two support plates 5 are provided on each railing 1. Of course, in order to reduce the number of support plates 5, thereby reducing the operation time for welding and fixing the support plates 5, the support plate 5 can be set as a corner triangular prism shape.

[0034] Of course, the shape of the support plate 5 is not limited to a right triangle; other shapes that can provide support are also acceptable, such as squares or circles.

[0035] Meanwhile, the support plate 5 is not limited to being welded and fixed to the railing 1, but can also be welded and fixed to the lower crossbar 2.

[0036] As a further description of the above embodiment, each of the railings 1 has a rope hole at its suspended end. The steel wire rope 3 passes through the rope hole and is connected to the railing 1. The center of each rope hole is equidistant from the end of the railing 1. Rope buckles 4 are installed on both sides of each railing 1 to fix the steel wire rope 3 to the railing 1.

[0037] In this embodiment, rope buckles 4 are installed on both sides of each railing 1 to fix the wire rope 3 to the railing 1. This ensures that the wire rope 3 drives the railing 1 to rotate, and also prevents the railing 1 from rotating downward under its own weight or external force after it is perpendicular to the lower crossbar 2.

[0038] In this embodiment, the steel wire rope 3 at the downstream end of the lowest railing 1 is firmly fixed to the railing 1 to prevent the steel wire rope 3 from coming loose.

[0039] In this embodiment, the rope buckle 4 is a clamp.

[0040] In summary, this invention allows for the folding of the guardrail during the descent of the steel pipe, preventing it from interfering with the descent. After the pipe is lowered, a winch pulls the wire rope to erect the guardrail, ensuring the safety of personnel moving up and down. This effectively solves the problem of the lack of guardrails on the ladder inside the TBM inclined shaft, improving construction safety. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A foldable guardrail device for a TBM inclined shaft ladder, characterized in that: The system includes a lower crossbar (2), which is fixed to the tunnel rock surface along the length of the tunnel. Several railings (1) are evenly hinged on the lower crossbar (2) along its length. Each railing (1) is fixedly connected to a support plate (5) at one end of its connection with the lower crossbar (2). The support plate (5) is located on the side facing the tunnel entrance. The other end of each railing (1) is connected to a steel wire rope (3). The other end of the steel wire rope (3) extends out of the tunnel entrance and is connected to a winch (7).

2. The foldable guardrail device for the TBM inclined shaft ladder according to claim 1, characterized in that: The lower crossbar (2) is fixedly connected to the tunnel rock surface by expansion bolts (6).

3. The foldable guardrail device for the TBM inclined shaft ladder according to claim 1, characterized in that: The lower crossbar (2) is a channel steel, and the railing (1) is set in the groove of the lower crossbar (2) and hinged to the lower crossbar (2) by a pin.

4. The foldable guardrail device for the TBM inclined shaft ladder according to claim 3, characterized in that: The end of the railing (1) located inside the channel steel is set in an arc shape.

5. The foldable guardrail device for the TBM inclined shaft ladder according to claim 1, characterized in that: The support plate (5) is a right-angled triangle plate. One right-angled side of the support plate (5) is welded to the side wall of the railing (1), and the other right-angled side of the support plate (5) is on the same straight line as the bottom of the railing (1).

6. The foldable guardrail device for the TBM inclined shaft ladder according to claim 1, characterized in that: Each of the railings (1) has a rope hole at its suspended end. The wire rope (3) passes through the rope hole and is connected to the railing (1). The center of each rope hole is equidistant from the end of the railing (1).

7. The foldable guardrail device for the TBM inclined shaft ladder according to claim 1, characterized in that: Each of the railings (1) has rope buckles (4) installed on both sides to fix the wire rope (3) to the railing (1).

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