Machine head gulp valve maintenance safety guardrail device

Abstract

A machine head gulp valve maintenance safety guardrail device comprises an inner arc-shaped angle plate and an outer arc-shaped angle plate, and the inner arc-shaped angle plate and the outer arc-shaped angle plate are arranged at the corner position of the upper portion of an outer ring and the corner position of the upper portion of an inner ring of a machine head cover respectively. Stand columns are arranged at the two ends of the top faces of the inner arc-shaped angle plates and the two ends of the top faces of the outer arc-shaped angle plates, a plurality of inner arc-shaped angle plates and a plurality of outer arc-shaped angle plates are arranged on the outer ring and the inner ring of the machine head cover respectively, protection chains are arranged between the adjacent inner arc-shaped angle plates and between the adjacent outer arc-shaped angle plates, and the protection chains are arranged between the adjacent stand columns. By adopting the structure, the guardrail structure can be quickly disassembled and assembled, the maintenance operation requirement of a gulp valve of a unit is met, and a safe operation environment is provided for maintenance personnel.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical installation protection, in particular to a safety guardrail device for overhauling the air inlet valve of the machine head. Background Art

[0002] When overhauling the air inlet valve of the unit, a machine head cover is installed at the top (such as Figure 1 ), and a large shaft air inlet valve is installed inside the machine head cover. In the annual overhaul standard items, it is required to check the operation status of the large shaft air inlet valve, and maintenance personnel need to climb onto the machine head cover plate for inspection. Since the height between the machine head cover plate and the upper frame cover plate is about 2.5 m, in order to ensure the safety of maintenance personnel, a safety guardrail needs to be installed.

[0003] The existing fixed-structure guardrails cannot be removed during the operation of the unit and are not suitable for the environment of the machine head cover that needs to be frequently overhauled. Therefore, a safety guardrail device that can provide safety protection during overhaul and can be quickly disassembled during non-overhaul periods is needed. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a safety guardrail device for overhauling the air inlet valve of the machine head, which can realize the quick disassembly and assembly of the guardrail structure, meet the overhaul operation requirements of the air inlet valve of the unit, and provide a safe operation environment for maintenance personnel.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a safety guardrail device for overhauling the air inlet valve of the machine head, including an inner arc-shaped angle plate and an outer arc-shaped angle plate, and the inner arc-shaped angle plate and the outer arc-shaped angle plate are respectively arranged at the outer circle and the upper corner position of the inner circle of the machine head cover.

[0006] Columns are provided at both ends of the top surfaces of the inner arc-shaped angle plate and the outer arc-shaped angle plate. A plurality of inner arc-shaped angle plates and outer arc-shaped angle plates are respectively provided on the outer circle and the inner circle of the machine head cover. A protective chain is provided between adjacent inner arc-shaped angle plates and between adjacent outer arc-shaped angle plates, and the protective chain is arranged between adjacent columns.

[0007] In a preferred solution, hanging rings are provided on the columns, and the ends of the protective chain are hung on the hanging rings through hooks.

[0008] In a preferred solution, embedded nuts are provided at both ends of the top surfaces of the inner arc-shaped angle plate and the outer arc-shaped angle plate, and a first threaded section is provided on the lower side wall of the column. The cooperation between the first threaded section and the embedded nut realizes the connection between the lower end of the column and the inner arc-shaped angle plate and the outer arc-shaped angle plate.

[0009] In a preferred solution, the inner arc-shaped angle plate and the outer arc-shaped angle plate on both sides at the same position on the same machine head cover are connected and fixed through a pull rod.

[0010] In a preferred embodiment, a first positioning cylinder is provided on the top surface of the inner arc-shaped angle plate, and a second positioning cylinder is provided on the top surface of the outer arc-shaped angle plate. The pull rod is arranged through the first positioning cylinder and the second positioning cylinder;

[0011] Among them, the inner wall of the first positioning cylinder is a smooth wall surface, the inner wall of the second positioning cylinder is provided with internal threads, and the part of the pull rod passing through the second positioning cylinder is provided with a second thread section, and the second thread section is matched with the internal threads on the inner wall of the second positioning cylinder.

[0012] In a preferred embodiment, a limiting piece is provided at one end of the pull rod passing through the first positioning cylinder.

[0013] In a preferred embodiment, a radial through hole is provided at one end passing through the second positioning cylinder, and a rotating rod is installed in the through hole in a pluggable manner.

[0014] A maintenance safety guardrail device for the air inlet valve of the machine head provided by the utility model has the following beneficial effects by adopting the above structure:

[0015] (1) By arranging the inner arc-shaped angle plate and the outer arc-shaped angle plate on the inner and outer circles of the machine head cover, and installing the upright posts and the protective chain between these angle plates, the device of the utility model forms a closed safety area surrounding the air inlet valve of the machine head, effectively preventing safety accidents caused by accidental falls of maintenance personnel during operation;

[0016] (2) There is no need to install embedded parts on the machine head cover, avoiding damage to the machine head cover;

[0017] (3) The pull rod ensures the overall stability of the guardrail by ensuring the inner arc-shaped angle plate and the outer arc-shaped angle plate on the inner and outer sides, and avoiding loosening of the guardrail caused by external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0019] Figure 1 It is a top view structural schematic diagram of the first structure of the present utility model.

[0020] Figure 2 It is a top view structural schematic diagram of the second structure of the present utility model.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the present utility model.

[0022] In the figure: machine head cover 1, inner arc-shaped angle plate 2, outer arc-shaped angle plate 3, upright post 4, hanging ring 5, protective chain 6, embedded nut 7, first thread section 8, pull rod 9, limiting piece 10, first positioning cylinder 11, second positioning cylinder 12, second thread section 13, through hole 14, rotating rod 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] As shown in Figures 1-3 FIG. 1, a safety guardrail device for overhauling the air inlet valve of the machine head includes an inner arc-shaped angle plate 2 and an outer arc-shaped angle plate 3, and the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3 are respectively arranged at the upper corner positions of the outer circle and the inner circle of the machine head cover 1;

[0024] At both ends of the top surfaces of the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3, vertical columns 4 are provided. A plurality of inner arc-shaped angle plates 2 and outer arc-shaped angle plates 3 are respectively arranged on the outer circle and the inner circle of the machine head cover 1. A protective chain 6 is arranged between adjacent inner arc-shaped angle plates 2 and between adjacent outer arc-shaped angle plates 3, and the protective chain 6 is arranged between adjacent vertical columns 4.

[0025] In a preferred solution, hanging rings 5 are provided on the vertical columns 4, and the ends of the protective chain 6 are hung on the hanging rings 5 through hooks.

[0026] In a preferred solution, embedded nuts 7 are provided at both ends of the top surfaces of the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3. A first threaded section 8 is provided on the lower side wall of the vertical column 4, and the cooperation between the first threaded section 8 and the embedded nut 7 realizes the connection between the lower end of the vertical column 4 and the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3.

[0027] In a preferred solution, the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3 on both sides at the same position on the same machine head cover 1 are connected and fixed by a pull rod 9.

[0028] In a preferred solution, a first positioning cylinder 11 is provided on the top surface of the inner arc-shaped angle plate 2, and a second positioning cylinder 12 is provided on the top surface of the outer arc-shaped angle plate 3. The pull rod 9 passes through the first positioning cylinder 11 and the second positioning cylinder 12;

[0029] Among them, the inner wall of the first positioning cylinder 11 is a smooth wall surface, the inner wall of the second positioning cylinder 12 is provided with internal threads, and a second threaded section 13 is provided on the part of the pull rod 9 passing through the second positioning cylinder 12. The second threaded section 13 is matched with the internal threads on the inner wall of the second positioning cylinder 12.

[0030] In a preferred solution, a limiting piece 10 is provided at one end of the pull rod 9 passing through the first positioning cylinder 11.

[0031] In a preferred solution, a radial through hole 14 is provided at one end passing through the second positioning cylinder 12, and a rotating rod 15 is installed in the through hole 14 in a pluggable manner.

[0032] As shown in Figure 2 FIG. 2, by further adding two vertical columns 4 on both sides of the second positioning cylinder 12 on the outer arc-shaped angle plate 3, the problem of narrow maintenance operation space caused by the protective chain 6 spanning above the machine head cover 1 can be avoided.

[0033] When installing the guardrail structure for the safety guardrail device for overhauling the air inlet valve of the machine head provided by the present invention:

[0034] Insert the pull rod 9 through the first positioning cylinder 11 on the inner arc-shaped angle plate 2 in advance, and ensure that the limiting piece 10 at one end of the pull rod 9 contacts the first positioning cylinder 11. Install the above components on the inner side of the top surface of the machine head cover 1. Then install the outer arc-shaped angle plate 3 on the outer side of the corresponding top surface of the machine head cover 1, and ensure that the second positioning cylinder 12 on the outer arc-shaped angle plate 3 passes through the pull rod 9. After that, insert the rotating rod 15 into the through hole 14 opened at one end of the pull rod 9, rotate the rotating rod 15 and make the pull rod 9 rotate axially, so that the second threaded section 13 cooperates with the second positioning cylinder 12 to realize the relative movement of the outer arc-shaped angle plate 3 towards the inner arc-shaped angle plate 2, and rely on the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3 to clamp the machine head cover 1 to realize the fixation of the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3 with the machine head cover 1.

[0035] After completing the above preliminary installation operation, screw the installation column 4 into the embedded nut 7 on the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3 to fix the column 4 between the inner arc-shaped angle plate 2 and the outer arc-shaped angle plate 3, and then hang the protective chain 6 between the adjacent columns 4.

[0036] During the operation, when the maintenance personnel are in danger of falling, the protective chain 6 can play a good protective role and reduce the safety risk.

[0037] After completing the maintenance operation, to ensure the normal operation of the unit, use the reverse operation method of the above installation process to remove the entire guardrail structure.

Claims

1. A safety guardrail device for overhauling the air inlet valve of the machine head, characterized in that: It includes an inner arc-shaped angle plate (2) and an outer arc-shaped angle plate (3), and the inner arc-shaped angle plate (2) and the outer arc-shaped angle plate (3) are respectively arranged at the upper corner positions of the outer circle and the inner circle of the nose hood (1); Columns (4) are provided at both ends of the top surfaces of the inner arc-shaped angle plate (2) and the outer arc-shaped angle plate (3). A plurality of inner arc-shaped angle plates (2) and outer arc-shaped angle plates (3) are respectively provided on the outer circle and the inner circle of the nose hood (1). A protective chain (6) is provided between adjacent inner arc-shaped angle plates (2) and between adjacent outer arc-shaped angle plates (3), and the protective chain (6) is arranged between adjacent columns (4).

2. The maintenance safety guardrail device for the air inlet valve of the machine head according to claim 1, wherein: Hanging rings (5) are provided on the columns (4), and the end of the protective chain (6) is hung on the hanging ring (5) through a hook.

3. The safety guardrail device for overhauling the air inlet valve of the machine head according to claim 1, characterized in that: Embedded nuts (7) are provided at both ends of the top surfaces of the inner arc-shaped angle plate (2) and the outer arc-shaped angle plate (3). A first threaded section (8) is provided on the lower side wall of the column (4), and the cooperation between the first threaded section (8) and the embedded nut (7) realizes the connection between the lower end of the column (4) and the inner arc-shaped angle plate (2) and the outer arc-shaped angle plate (3).

4. The overhaul safety guardrail device for the air intake valve of the machine head according to claim 1, characterized in that: The inner arc-shaped angle plate (2) and the outer arc-shaped angle plate (3) on both sides at the same position on a single nose hood (1) are connected and fixed through a pull rod (9).

5. The overhaul safety guardrail device for the air inlet valve of the machine head according to claim 4, characterized in that: A first positioning cylinder (11) is provided on the top surface of the inner arc-shaped angle plate (2), and a second positioning cylinder (12) is provided on the top surface of the outer arc-shaped angle plate (3). The pull rod (9) is arranged through the first positioning cylinder (11) and the second positioning cylinder (12); Among them, the inner wall of the first positioning cylinder (11) is a smooth wall surface, the inner wall of the second positioning cylinder (12) is provided with internal threads, a second threaded section (13) is provided on the part of the pull rod (9) passing through the second positioning cylinder (12), and the second threaded section (13) cooperates with the internal threads on the inner wall of the second positioning cylinder (12).

6. The overhaul safety guardrail device for the air intake valve of the machine head according to claim 5, characterized in that: A limiting piece (10) is provided at one end of the pull rod (9) passing through the first positioning cylinder (11).

7. The overhaul safety guardrail device for the air intake valve of the machine head according to claim 5, characterized in that: A radial through hole (14) is provided at one end passing through the second positioning cylinder (12), and a rotating rod (15) is installed in the through hole (14) in a pluggable manner.

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