A safety rope suspension device for cold boxes

Abstract

The utility model provides a safe rope suspension device for cold box, this suspension device includes base, grab arm mechanism and suspension mechanism, wherein the base bottom end is equipped with annular slide groove, at least two grab arm mechanisms are opposite and are provided in the top of base, include a plurality of mechanical arms of sequential rotation connection, its end is equipped with the jaw for with the cold box lateral wall top connection, suspension mechanism sliding connection is in annular slide groove. The utility model provides reliable safety rope suspension position for high place operating personnel, and this position can adjust according to operating personnel movement demand, need not to untie safety rope, has guaranteed operating safety, has improved construction efficiency, whole simple structure, is convenient for installation and dismounting, and can turn over and use, and the scope of application is extensive.

Description

Technical Field

[0001] This utility model belongs to the field of cold box construction technology, and in particular relates to a safety rope suspension device for cold boxes. Background Technology

[0002] During the construction of the cold box at the oxygen production station, the high height of the cold box, the confined working space inside, and the complex piping and equipment all contribute to the high difficulty and risk of construction. To facilitate construction and ensure operational safety, a full-span scaffolding platform is erected inside the cold box, covered with planks. When workers are working at height on this platform, they need to find suitable points to suspend their safety ropes; especially when workers are moving between work positions, they often need to untie their safety ropes, further increasing the risk. Furthermore, when flaw detection personnel are conducting flaw detection, it is even more difficult to find suitable locations to suspend safety ropes because some scaffolding and planks have been removed, requiring the addition of other facilities, which increases construction costs and time. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a safety rope suspension device for cold boxes, which provides a reliable safety rope suspension position for workers at heights, ensuring work safety and improving construction efficiency.

[0004] The technical solution adopted in this utility model is: a safety rope suspension device for cold boxes, comprising:

[0005] The base has an annular groove at its bottom end;

[0006] The gripping arm mechanism, at least two of the gripping arm mechanisms are disposed opposite to each other on the top of the base, including a plurality of mechanical arms that are rotatably connected in sequence, and the ends of the arms are provided with grippers for connecting to the top of the side wall of the cold box;

[0007] The suspension mechanism is slidably connected within the annular groove and is used to connect a safety rope.

[0008] Furthermore, the robotic arm includes a fixed arm, several extension arms, and a connecting arm that are hinged together in sequence. One end of the fixed arm is vertically fixed to the base. The gripper is rotatably connected to the connecting arm and can extend to the outside of the base.

[0009] Furthermore, adjacent robotic arms are connected by a hinge shaft, which is arranged perpendicular to the length direction of the robotic arm.

[0010] Furthermore, the annular groove includes an inner ring wall, an outer ring wall, and a support plate. The support plate is disposed at the bottom end of the inner ring wall and the outer ring wall and has an annular opening. The suspension mechanism passes through the annular opening and is suspended from the support plate, and is rotatably connected to the inner ring wall and the outer ring wall.

[0011] Furthermore, the suspension mechanism includes a pressure plate, a sliding plate, a connecting shaft, and rollers; the sliding plates are spaced apart, and the connecting shaft is located between the two sliding plates; the pressure plate is located at the top of the sliding plates and extends outward from the two sliding plates; the rollers are located at the top of the pressure plate, and the outer edges of the rollers protrude from the end of the pressure plate away from the sliding plates.

[0012] Furthermore, the sliding plate is an arc-shaped plate with the same curvature as the annular groove.

[0013] Furthermore, the base includes several sector-shaped seats that can be assembled and connected, and the bottom end of each sector-shaped seat is provided with an arc-shaped groove, which is assembled and connected to form the annular sliding groove.

[0014] Furthermore, the gripper includes opposing clamping plates, and the distance between the clamping plates is adjustable.

[0015] Furthermore, the gripper includes a rotating shaft arranged along the axial direction of the connecting arm.

[0016] The advantages and positive effects of this utility model are:

[0017] (1) The safety rope suspension device for cold boxes proposed in this application provides a reliable safety rope suspension position for workers at heights, and the position can be adjusted according to the movement needs of the workers without untying the safety rope, thus ensuring work safety and improving construction efficiency.

[0018] (2) By setting up a suspension mechanism and annular slide, the suspension mechanism can drive the safety rope to move in any direction, with a wide range of adjustment to adapt to the work needs of workers in different positions.

[0019] (3) By setting up robotic arms and grippers, the number of robotic arms can be increased or decreased as needed to adapt to different specifications of cold boxes; through the cooperation of robotic arms and grippers, the grippers can be adjusted to a connection angle that matches the side wall of the cold box to ensure a reliable connection between the grippers and the side wall of the cold box.

[0020] (4) The overall structure is simple, easy to install and disassemble, and can be reused, with a wide range of applications. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present invention;

[0022] Figure 2 This is a bottom view schematic diagram of a specific embodiment of the present invention;

[0023] Figure 3This is a schematic diagram of the gripper mechanism structure of a specific embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the suspension mechanism structure of a specific embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of a sector-shaped base structure according to a specific embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram illustrating the use of a specific embodiment of this utility model.

[0027] In the picture:

[0028] 1. Grab arm mechanism; 11. Fixed arm; 12. Extension arm; 13. Connecting arm; 14. Gripper; 141. Rotating shaft; 142. Clamping plate; 2. Base; 21. Annular groove; 211. Inner ring wall; 212. Outer ring wall; 213. Support plate; 3. Suspension mechanism; 31. Sliding plate; 32. Pressure plate; 33. Connecting shaft; 34. Roller; 4. Safety rope; 5. Cold box. Detailed Implementation

[0029] The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0030] This utility model provides a safety rope suspension device for cold boxes, used to suspend safety ropes during construction work inside the cold box. The cold box is the core equipment of a cryogenic air separation system, typically consisting of four side walls and housing various precision equipment such as heat exchangers and distillation columns, as well as related pipes and instruments. Construction work inside the cold box often requires working at heights. The safety rope suspension device proposed in this application provides a reliable suspension position for workers at heights, and this position can be adjusted according to the movement needs of the workers without untying the safety rope, ensuring operational safety and improving construction efficiency. The suspension device includes a base, a grab arm mechanism, and a suspension mechanism, each of which will be described in detail below.

[0031] like Figures 1 to 2 As shown in the embodiment, this application proposes a safety rope suspension device for a cold box, comprising:

[0032] The base 2 has an annular groove 21 at its bottom end;

[0033] The grabbing arm mechanism 1, at least two grabbing arm mechanisms 1 are disposed opposite to each other on the top of the base 2, including a plurality of mechanical arms that are rotatably connected in sequence, and the ends of the arms are provided with grippers 14 for connecting to the top of the side wall of the cold box 5;

[0034] The suspension mechanism 3 is slidably connected in the annular groove 21 and is used to connect the safety rope 4.

[0035] It should be noted that the base 2, which serves as the mounting base for the grab arm mechanism 1 and the suspension mechanism 3, has two opposing ends. The end facing upwards is designated as the top end, and the end facing downwards as the bottom end. The grab arm mechanism 1 is positioned at the top of the base 2 to fix the base 2 to the top of the side wall of the cold box 5. The grab arm mechanism 1, by providing multiple sequentially rotatably connected robotic arms, extends to the side wall of the cold box 5 and is adjusted to a suitable angle so that the gripper 14 can clamp the side wall, thereby achieving a stable connection between the base 2 and the side wall of the cold box 5. By providing an annular groove 21 at the bottom of the base 2, the suspension mechanism 3 can move circumferentially along the annular groove 21, driving the safety rope 4 to move, adapting to the needs of moving operations at different locations within the cold box 5.

[0036] Preferably, the bottom end of the suspension mechanism 3 extends out of the annular groove 21, so that the connection point between the safety rope 4 and the suspension mechanism 3 is located outside the annular groove 21, so as to prevent the safety rope 4 from hindering the suspension mechanism 3 from sliding in the annular groove 21.

[0037] The aforementioned base 2 can be a flat plate structure, and its shape can be circular or other shapes; the gripper mechanism 1 can be disposed on one end face of the base 2, and the annular groove 21 can be a structure protruding from the other end face of the base 2 or a structure embedded in the other end face of the base 2, without limitation; in a specific embodiment of this application, such as Figure 2 As shown, the annular groove 21 protrudes from the other end face of the base 2 and is arranged around the center of the base 2, so that the suspension mechanism 3 can drive the safety rope 4 to move in any direction and has a wide range of adjustment.

[0038] At least two gripping arm mechanisms 1 are provided. When there are two gripping arm mechanisms 1, the two gripping arm mechanisms 1 are arranged opposite each other at the top of the suspension mechanism 3 and are respectively connected to the top of two opposite side walls of the cold box 5 through the grippers 14. In a preferred embodiment, four gripping arm mechanisms 1 are provided and are evenly arranged around the center of the base 2. The four gripping arm mechanisms 1 are respectively opposite each other and connected to the four side walls of the cold box 5 through the grippers 14. The overall length of the four gripping arm mechanisms 1 can be the same, so that the base 2 after installation is located in the middle of the cold box 5. Alternatively, the gripping arm mechanisms 1 can be set to different lengths as needed, so that the base 2 after installation is close to any side wall of the cold box 5.

[0039] Furthermore, in the embodiments of this application, such as Figure 3As shown, the robotic arm includes a fixed arm 11, several extension arms 12 and a connecting arm 13 that are hinged together in sequence. One end of the fixed arm 11 is vertically fixed to the base 2. The gripper 14 is rotatably connected to the connecting arm 13 and can cooperate with the robotic arm to extend to the outside of the base 2. In one specific embodiment, four gripper mechanisms 1 are provided, all with the same structure, each including a fixed arm 11, two extension arms 12, and a connecting arm 13. The bottom end of the fixed arm 11 is fixed to the base 2, and the top end is hinged to one of the extension arms 12. The two extension arms 12 are hinged to each other. At the same time, one end of the connecting arm 13 is hinged to one of the extension arms 12, and the other end is rotatably connected to the gripper 14. By adjusting the included angle between adjacent fixed arms 11, extension arms 12, and connecting arms 13, the robotic arm can have different lengths on a plane parallel to the base 2 to adapt to different specifications of cold boxes 5. By rotating the gripper 14 relative to the robotic arm, the gripper 14 can be adjusted to a connection angle that matches the side wall of the cold box 5 to ensure effective connection between the gripper 14 and the side wall of the cold box 5.

[0040] Furthermore, in this embodiment, adjacent robotic arms are connected by hinge shafts, which are arranged perpendicular to the length direction of the robotic arms; that is, the hinge shafts located in the same gripper mechanism 1 are arranged in parallel. Through the above technical solution, the robotic arms can rotate at the hinge point in a direction perpendicular to their own axis, realizing angle adjustment between robotic arms. The parallel arrangement of the hinge shafts within the same gripper mechanism 1 ensures the coordination of the movement directions of each robotic arm, reduces the risk of interference during movement, and improves the durability and reliability of the robotic arms. Simultaneously, the hinge shaft connection method facilitates modular design of the robotic arms; by increasing or decreasing the number of robotic arms, the length of the robotic arms can be easily expanded or reduced to adapt to different specifications of cold boxes 5.

[0041] In a preferred embodiment, the base 2 is a circular plate structure, and four robotic arms are evenly arranged around the circumference of the base 2. The length direction of each robotic arm is constructed to extend radially along the base 2, and the hinge axis is arranged radially perpendicular to the base 2. The rods that make up the fixed arm 11, several extension arms 12 and connecting arms 13 of the robotic arm all have sufficient rigidity to withstand large axial forces and shear forces. When the base 2 is subjected to the downward tension of the safety rope 4, since the four robotic arms are evenly distributed and opposite each other, according to symmetry, the forces exerted by the four robotic arms on the base 2 are equal in magnitude and can be decomposed into vertical and horizontal components. The horizontal components of the oppositely positioned rods are equal in magnitude and opposite in direction, and are transmitted sequentially to the side wall of the cold box 5, thus balancing the forces on the base 2 in the horizontal direction. At the same time, the resultant force of the four rods in the vertical direction is sufficient to resist the downward tension of the safety rope 4, so that the base 2 is balanced in the vertical direction. This ensures that the base 2 maintains force balance under the downward tension, providing a stable and reliable safety rope suspension position for the workers.

[0042] Furthermore, in the embodiments of this application, such as Figure 5 As shown, the annular groove 21 includes an inner ring wall 211, an outer ring wall 212 and a support plate 213. The support plate 213 is disposed at the bottom end of the inner ring wall 211 and the outer ring wall 212 and has an annular opening. The suspension mechanism 3 passes through the annular opening and is suspended on the support plate 213, and is rotatably connected to the inner ring wall 211 and the outer ring wall 212. Through the above technical solution, the annular slide 21 is composed of an inner ring wall 211, an outer ring wall 212, and a support plate 213, which together form a stable support frame with good stability and resistance to deformation. By fixing it to the bottom of the base 2, it can effectively bear the load transmitted by the suspension mechanism 3. The support plate 213 is set at the bottom of the inner ring wall 211 and the outer ring wall 212, providing a direct and stable support surface for the suspension mechanism 3, ensuring that the suspension mechanism 3 remains stable during operation and reducing vibration or shaking caused by suspension. The suspension mechanism 3 is connected to the inner ring wall 211 and the outer ring wall 212 by rolling, which reduces the frictional resistance between the suspended mechanism and the annular slide 21, ensuring smooth sliding of the suspension mechanism 3. At the same time, the suspension mechanism 3 is suspended through the annular opening of the support plate 213, which realizes the limitation of the suspension mechanism 3 and prevents the suspension mechanism 3 from deviating or derailing during movement.

[0043] Furthermore, in the embodiments of this application, such as Figure 4As shown, the suspension mechanism 3 includes a pressure plate 32, a sliding plate 31, a connecting shaft 33, and rollers 34. The sliding plates 31 are spaced apart, and the connecting shaft 33 is positioned between the two sliding plates 31. The pressure plate 32 is located at the top of the sliding plates 31 and extends outward from the two sliding plates 31. The rollers 34 are located at the top of the pressure plate 32, with their outer edges protruding from the ends of the pressure plate 32 away from the sliding plates 31. It is understood that the distance between the two sliding plates 31 is adapted to the opening of the annular groove 21, so that the sliding plates 31 do not contact the support plates 213 at both ends of the opening and extend outward from the annular groove 21. The connecting shaft 33 is connected to the middle of the sliding plates 31, and its upper end has sufficient space to accommodate the safety rope 4, allowing the safety rope 4 to pass between the two sliding plates 31 and be wound around the connecting shaft 33. The pressure plate 32 is located at the top of the two sliding plates 31 and can be a flat plate structure or correspond to the two sliding plates. The pressure plate 32 is set in the annular groove 21 and placed on the support plate 213 during use. The rollers 34 are set on the upper part of the pressure plate 32 in a direction parallel to the pressure plate 32 and partially protrude from the pressure plate 32. The distance between the outer edges of the rollers 34 is adapted to the distance between the inner ring wall 211 and the outer ring wall 212, so that the rollers 34 are rolled and connected to the inner ring wall 211 and the outer ring wall 212 respectively. Preferably, two pressure plates 32 and two sliding plates 31 are set, and each pressure plate 32 is provided with a set of at least two rollers 34.

[0044] Preferably, in this embodiment of the application, the sliding plate 31 is an arc-shaped plate with the same curvature as the annular groove 21, so that when the sliding plate 31 slides in the annular groove 21, the distance between it and the two side support plates 213 is always the same, ensuring that it slides smoothly without jamming.

[0045] Furthermore, in the embodiments of this application, such as Figure 5 As shown, the base 2 includes several sector-shaped seats that can be assembled and connected. The bottom end of each sector-shaped seat is provided with an arc-shaped groove, and the arc-shaped grooves are assembled to form an annular sliding groove 21. By setting the base 2 to be composed of several sector-shaped seats, the suspension mechanism 3 can be pre-installed in any of the arc-shaped grooves, and then the base 2 can be assembled to form an integral structure, thus achieving a stable connection between the suspension mechanism 3 and the base 2. Preferably, the base 2 is a circular planar structure, and the shape of the sector-shaped seats is based on equal-angle divisions, so that the shape and size of each sector-shaped seat and the arc-shaped groove are the same, which facilitates modular processing and reduces processing difficulty.

[0046] Specifically, in the above embodiments, the radial edges of the sector-shaped base are provided with corresponding connecting ears. Adjacent sector-shaped bases can be connected and fixed by bolts passing through the connecting ears, and finally assembled to form the base 2 as a whole. Preferably, the connecting ears are located at the top of the sector-shaped base.

[0047] Furthermore, in this embodiment, the gripper 14 includes opposing clamping plates 142, the distance between which is adjustable. By setting the clamping plates 142 to a distance adapted to the thickness of the side wall of the cold box 5, inserting them from top to bottom into the top of the side wall of the cold box 5, and then adjusting the clamping plates 142 to tighten them, the clamping plates 142 clamp the side wall of the cold box 5 from both sides, thus achieving a stable connection between the gripper 14 and the side wall of the cold box 5. Specifically, the gripper 14 includes opposing clamping plates 142 and a top plate vertically positioned at the top of the two clamping plates 142. One clamping plate 142 is fixedly connected to the top plate, and the top plate has a through groove with a connecting lug on one side of the through groove. The other clamping plate 142 has a connecting part that matches the through groove, and the upper end of the connecting part has a connecting lug, which corresponds to the connecting lug on the top plate. The opposing connecting lugs are connected by bolt threads and fixed by nuts. By rotating the bolt, one clamping plate 142 can be moved along the through groove to move closer to or further away from the other clamping plate 142, thereby adjusting the distance between the clamping plates 142.

[0048] Furthermore, in this embodiment of the application, the gripper 14 includes a rotating shaft 141, which is arranged along the axial direction of the connecting arm 13. In use, by adjusting the angle of the connecting arm 13 to extend it vertically, the gripper 14 is then rotated so that the clamping plates 142 of the gripper 14 are respectively aligned with the two sides of the side wall of the cold box 5, so that the angle of the gripper 14 is adapted to the side wall of the cold box 5.

[0049] like Figure 6 As shown in the embodiments of this application, a method for using the above-mentioned safety rope suspension device for cold boxes is proposed, including the following steps:

[0050] S1. Determine the number of extension arms 12 according to the size of the cold box 5, and assemble them to form the grab arm mechanism 1;

[0051] S2. Install the grab arm mechanism 1 onto the sector-shaped base respectively;

[0052] S3. Pass the safety rope through the connecting shaft 33 of the suspension mechanism 3 and install the suspension mechanism 3 in the arc groove;

[0053] S4. Assemble and connect the sector-shaped base to form base 2;

[0054] S5. Adjust the connection angle of the gripper mechanism 1 so that the gripper 14 clamps the side wall of the cold box 5.

[0055] The aforementioned safety rope suspension device has a simple overall structure, is easy to install and disassemble, can be reused, and has a wide range of applications.

[0056] In this embodiment, before starting work, the worker can connect the safety rope on their body to the safety rope 4 on the safety rope suspension device, and during the work, control the release and retraction of the safety rope through the rope controller, thereby flexibly changing the available length of the safety rope; at the same time, the position of the safety rope 4 on the safety rope suspension device can be flexibly adjusted according to the needs of the work location, so as to facilitate the worker to move to different positions inside the cold box for work.

[0057] The advantages and positive effects of this utility model are:

[0058] (1) The safety rope suspension device for cold boxes proposed in this application provides a reliable safety rope suspension position for workers at heights, and the position can be adjusted according to the movement needs of the workers without untying the safety rope, thus ensuring work safety and improving construction efficiency.

[0059] (2) By setting up a suspension mechanism and annular slide, the suspension mechanism can drive the safety rope to move in any direction, with a wide range of adjustment to adapt to the work needs of workers in different positions.

[0060] (3) By setting up robotic arms and grippers, the number of robotic arms can be increased or decreased as needed to adapt to different specifications of cold boxes; through the cooperation of robotic arms and grippers, the grippers can be adjusted to a connection angle that matches the side wall of the cold box to ensure a reliable connection between the grippers and the side wall of the cold box.

[0061] (4) The overall structure is simple, easy to install and disassemble, and can be reused, with a wide range of applications.

[0062] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A safety rope suspension device for a cold box, characterized in that, include: The base has an annular groove at its bottom end; The gripping arm mechanism, at least two of the gripping arm mechanisms are disposed opposite to each other on the top of the base, including a plurality of mechanical arms that are rotatably connected in sequence, and the ends of the arms are provided with grippers for connecting to the top of the side wall of the cold box; The suspension mechanism is slidably connected within the annular groove and is used to connect a safety rope.

2. The safety rope suspension device for a cold box according to claim 1, characterized in that: The robotic arm includes a fixed arm, several extension arms, and a connecting arm that are hinged together in sequence. One end of the fixed arm is vertically fixed to the base. The gripper is rotatably connected to the connecting arm and can extend to the outside of the base.

3. The safety rope suspension device for a cold box according to claim 2, characterized in that: The adjacent robotic arms are connected by a hinge shaft, which is arranged perpendicular to the length direction of the robotic arm.

4. The safety rope suspension device for a cold box according to claim 2 or 3, characterized in that: The annular groove includes an inner ring wall, an outer ring wall, and a support plate. The support plate is disposed at the bottom end of the inner ring wall and the outer ring wall and has an annular opening. The suspension mechanism passes through the annular opening and is suspended from the support plate, and is rotatably connected to the inner ring wall and the outer ring wall.

5. The safety rope suspension device for a cold box according to claim 4, characterized in that: The suspension mechanism includes a pressure plate, a sliding plate, a connecting shaft, and rollers; the sliding plates are spaced apart, and the connecting shaft is located between the two sliding plates; the pressure plate is located at the top of the sliding plates and extends outward from the two sliding plates; the rollers are located at the top of the pressure plate, and the outer edges of the rollers protrude from the end of the pressure plate away from the sliding plates.

6. The safety rope suspension device for a cold box according to claim 5, characterized in that: The sliding plate is an arc-shaped plate, and its curvature is the same as that of the annular groove.

7. The safety rope suspension device for a cold box according to claim 1 or 6, characterized in that: The base includes several sector-shaped seats that can be assembled and connected. The bottom end of each sector-shaped seat is provided with an arc-shaped groove, and the arc-shaped grooves are assembled and connected to form the annular sliding groove.

8. The safety rope suspension device for a cold box according to claim 2, characterized in that: The gripper includes opposing clamping plates, and the distance between the clamping plates is adjustable.

9. The safety rope suspension device for a cold box according to claim 8, characterized in that: The gripper includes a rotating shaft, which is arranged along the axial direction of the connecting arm.

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