Limited space hole protecting and sealing device

Abstract

The utility model provides a limited space hole protecting and sealing device which comprises a cover plate and a clamping structure hinged to one side of the cover plate, and an overhanging clamping plate is arranged on the lower side of the clamping structure and used for abutting against the edge of a hole. The overhanging structure is formed on the lower side of the floor slab through the overhanging clamping plate, the clamping structure clamps the floor slab on the edge of the hole, one end of the overhanging clamping plate is limited by the clamping structure, the other end of the overhanging clamping plate abuts against the lower side of the floor slab, the clamping structure can stably clamp the edge of the hole, and therefore the overhanging clamping plate cannot fall off even when the cover plate is opened. The defect that the structure is damaged due to the fact that holes need to be punched in the clamping structure and the floor is avoided, bolts or screws do not need to be arranged in the holes in a penetrating mode, and mounting and dismounting are more convenient; and meanwhile, the hinged cover plate can be conveniently opened for people to enter and exit and then cover the hole.

Description

Technical Field

[0001] The utility model relates to the technical field of construction safety protection, in particular to a hole opening protection and sealing device. Background Art

[0002] During the construction process, openings must be reserved on the floor slabs. Some of these openings will later be used as elevator shafts, ventilation holes, or equipment shafts. Some can also be used as reserved holes for pipes during mechanical and electrical installation. Furthermore, due to construction needs, some openings also need to serve as entrances and exits for workers to enter confined spaces for construction. The openings cannot be completely sealed. Such confined space operations have always been a key difficulty in construction process management. To ensure that confined space operations are controlled, we need to install a device at the entrance and exit that is easy to open and close, but cannot be opened privately by workers using simple tools. This device not only protects the opening but also locks the opening.

[0003] A Chinese utility model, published on July 10, 2018, and numbered CN 207597904 U, discloses a movable opening protection device for covering an opening in a building's main structure. The device comprises a fixed connecting plate, an opening protection plate, a hinge, a fixed locking member, and a movable locking member. The fixed connecting plate is mounted around the opening and fixedly connected to the main structure via expansion bolts. One side of the opening protection plate is hinged to the fixed connecting plate. The fixed locking member is fixedly connected to the opening protection plate, and the movable locking member passes through a mounting hole in the opening protection plate. To tighten, the movable locking member is rotated to engage the floor slab of the opening and align the movable locking member with the locking hole of the fixed locking member. This movable opening protection device is not only reusable and easy to install, but also provides reliable and secure protection.

[0004] However, the above patent requires drilling holes in the floor slab for fixing, which is inconvenient and troublesome to install and disassemble. In addition, the holes left in the floor slab damage the structure. Summary of the Invention

[0005] In response to the above technical problems, the present invention proposes a confined space opening protection and sealing device, which is used to solve the problem in the prior art that the opening protection device needs to be fixed by drilling holes in the floor slab.

[0006] In order to achieve the above object, the technical solution of the utility model is achieved as follows:

[0007] A protective closure device for a confined space opening includes a cover plate and a securing structure hinged to one side of the cover plate. A cantilevered securing plate is provided on the underside of the securing structure for tightening against the edge of the opening. The utility model forms a cantilevered structure on the underside of a floor slab by means of the cantilevered securing plate. Since the securing structure grips the floor slab at the edge of the opening, one end of the cantilevered securing plate is limited by the securing structure, while the other end presses against the underside of the floor slab. This allows the securing structure to stably grip the edge of the opening, preventing it from falling even when the cover plate is opened. This avoids the need to drill holes in the securing structure and the floor slab, which could damage the structure. Furthermore, no bolts or screws are required to be inserted into the holes, making installation and removal more convenient.

[0008] Furthermore, the fixing structure includes an inverted L-shaped steel piece, and the cantilevered clamping plate is welded to the lower side of the inverted L-shaped steel piece so that the inverted L-shaped steel piece and the cantilevered clamping plate form a clamping groove for clamping the edge of the hole.

[0009] Furthermore, the inverted L-shaped steel piece is an angle steel.

[0010] Furthermore, a locking mechanism is provided at a position of the cover plate away from the fastening structure.

[0011] Furthermore, the locking mechanism includes a clamping piece rotatably arranged on the cover plate for clamping the edge of the hole on the other side.

[0012] Furthermore, the clamping member includes a "Z"-shaped component, the middle part of the "Z"-shaped component is passed through the cover plate and is rotatably connected to the cover plate; one end of the "Z"-shaped component is located on the lower side of the cover plate and can cooperate with the cover plate to clamp the edge of the hole, and the other end is located on the upper side of the cover plate for fixing to the cover plate.

[0013] Furthermore, a locking structure is provided between the cover plate and one end of the "Z"-shaped component located on the upper side of the cover plate.

[0014] Furthermore, the locking structure includes a movable lock hole plate arranged at the end of the "Z"-shaped component and a fixed lock hole plate arranged on the cover plate. The movable lock hole plate and the fixed lock hole plate are respectively provided with alignable lock holes for inserting locks.

[0015] Furthermore, the clamping piece is an integrated structure formed by bending steel bars.

[0016] Furthermore, a reinforcing rib is provided on the lower side of the cover plate.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model is fixed on the edge of the hole through the clamping structure, without the need for drilling, which avoids damage to the floor and the trouble of installation and disassembly;

[0019] 2. The utility model forms a clamping structure by arranging an inverted L-shaped steel piece and arranging a long cantilevered card plate on the lower side of the inverted L-shaped steel piece. The cantilevered card plate forms a cantilevered structure on the lower side of the floor slab. Since one end of the cantilevered card plate is pressed against the lower side of the floor slab and the other end is limited by the inverted L-shaped steel piece at the edge of the opening, the cantilevered card plate and the inverted L-shaped steel piece can stably clamp the edge of the opening, so that even when the cover plate is opened, it will not fall off.

[0020] 3. The utility model improves the strength of the cover plate and better protects the hole by arranging reinforcing ribs forming a square frame on the lower side of the cover plate;

[0021] 4. The utility model provides a locking mechanism so that the cover can only be opened by unlocking it, thus avoiding the disadvantages of workers dismantling it with a wrench and avoiding the disadvantages of workers opening it privately with simple tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a side structural schematic diagram of the present utility model.

[0024] Figure 2 This is a schematic diagram of the main structure of the present utility model.

[0025] Reference numerals in the figures:

[0026] 1. Fastener, 2. Keyhole, 3. Cover plate, 31. Fixed keyhole plate, 4. Inverted L-shaped steel piece, 5. Reinforcement rib, 6. Cantilevered fastener. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1 and Figure 2As shown, a confined space opening protection and sealing device described in Example 1 of the present invention includes a cover plate 3 and a fixing structure provided on one side of the cover plate 3. The cover plate 3 is used to close the opening to form protection. The fixing structure is used to clamp one side of the edge of the opening so that the cover plate 3 remains stable and does not move. The fixing structure is hinged to the cover plate 3 so that the cover plate 3 can be opened during the protection period to facilitate people or objects to enter the opening for construction operations or convenient inspection. A cantilevered card 6 is provided on the lower side of the fixing structure to tighten the edge of the opening. The cantilevered card forms a cantilever structure on the lower side of the floor slab. Since the fixing structure clamps the floor slab at the edge of the opening, one end of the cantilevered card is limited by the fixing structure and the other end is pressed against the lower side of the floor slab, so that the fixing structure itself can stably clamp the edge of the opening. Therefore, even when the cover plate is opened, it will not fall off, avoiding the disadvantage of needing to drill holes in the fixing structure and the floor slab to damage the structure. In addition, no bolts or screws need to be inserted into the holes, making installation and disassembly more convenient.

[0029] Further, if Figure 1 As shown, the fixing structure includes an inverted L-shaped steel member 4, and a cantilevered clamping plate 6 is welded to the lower side of the inverted L-shaped steel member 4 so that the inverted L-shaped steel member 4 and the cantilevered clamping plate 6 form a clamping groove for clamping the edge of the hole.

[0030] Example 2 is different from Example 1 in that the inverted L-shaped steel member 4 is an angle steel. One side of the angle steel is vertically downward to form the inverted L-shaped steel member 4, and the length direction of the angle steel is set along one side edge of the cover plate 3. In this embodiment, a hinge is set on the back of the angle steel to be hinged to the cover plate 3. In another embodiment, a hinge can also be set on the back of the angle steel or on one of the edges of the cover plate 3.

[0031] Example 3 is different from Example 1 in that Figure 1 As shown, a locking mechanism is provided at a position of the cover plate 3 away from the fastening structure.

[0032] Further, if Figure 1 As shown, the locking mechanism includes a clamping member 1 that is rotatably arranged on the cover plate 3. After the clamping member 1 is rotated to a certain position, it can be away from the edge of the hole, which is convenient for opening or closing the cover plate 3. After being rotated to another position, it is used to clamp the edge of the hole on the other side to prevent the cover plate 3 from opening, thereby playing a stable protective role.

[0033] Specifically, if Figure 1 As shown, the fastening member 1 includes a "Z"-shaped component, the middle part of the "Z"-shaped component is passed through the cover plate 3 and is rotatably connected to the cover plate 3; one end of the "Z"-shaped component is located on the lower side of the cover plate 3 and can cooperate with the cover plate 3 to clamp the edge of the hole, and the other end of the "Z"-shaped component is located on the upper side of the cover plate 3 for fixing to the cover plate 3.

[0034] Furthermore, a locking structure is provided between one end of the "Z"-shaped member located above the cover plate 3 and the cover plate 3. On the one hand, the locking structure prevents the random rotation of the "Z"-shaped member.

[0035] In another preferred embodiment, the fastener 1 is an integral structure formed by bending a steel bar. It is convenient to obtain local materials and manufacture the fastener 1 by bending a steel bar.

[0036] Embodiment 4 is different from Embodiment 3 in that, as Figure 1 shown, the locking structure includes a movable locking hole plate provided at the end of the "Z"-shaped member and a fixed locking hole plate 31 provided on the cover plate 3. Locking holes 2 are respectively provided on the movable locking hole plate and the fixed locking hole plate 31. When the fastener 1 rotates to a certain position where it can hold the edge of the other side of the hole, the movable locking hole plate and the fixed locking hole plate 31 are in contact with each other so that their locking holes 2 are aligned, and a lock is inserted through the locking holes 2 of the two to play a role in locking and fixing.

[0037] Embodiment 5 is different from Embodiment 1 in that, as Figure 2 shown, reinforcing rib plates 5 are provided on the lower side of the cover plate 3. In this embodiment, at least four reinforcing rib plates 5 are provided in total to form a square frame, or five reinforcing rib plates 5 are provided to form a structure in the shape of a Chinese character 'Ri'. In another embodiment, the reinforcing rib plates 5 are made of angle steel and welded to the lower side of the cover plate 3.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any modification to the technical solutions described in the foregoing embodiments, or any equivalent replacement of some or all of the technical features, without departing from the spirit and principle of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A protective sealing device for a confined space opening, characterized by: The invention comprises a cover plate (3) and a clamping structure hinged on one side of the cover plate (3), wherein a cantilever clamping plate (6) is provided on the lower side of the clamping structure for tightening the edge of the hole; the clamping structure comprises an inverted L-shaped steel member (4), and the cantilever clamping plate (6) is welded to the lower side of the inverted L-shaped steel member (4) so ​​that the inverted L-shaped steel member (4) and the cantilever clamping plate (6) form a clamping groove for clamping the edge of the hole; a locking mechanism is provided at a position of the cover plate (3) away from the clamping structure; the locking mechanism comprises a clamping member (1) rotatably arranged on the cover plate (3) for clamping the edge of the hole on the other side; the clamping member (1) comprises a "Z"-shaped component, the middle part of the "Z"-shaped component is passed through the cover plate (3) and is rotatably connected to the cover plate (3); one end of the "Z"-shaped component is located on the lower side of the cover plate (3) and can cooperate with the cover plate (3) to clamp the edge of the hole, and the other end is located on the upper side of the cover plate (3) for fixing to the cover plate (3).

2. The confined space opening protection and sealing device according to claim 1, characterized in that: The inverted L-shaped steel piece (4) is an angle steel.

3. The confined space opening protection and sealing device according to claim 1 or 2, characterized in that: A locking structure is provided between one end of the "Z"-shaped component located on the upper side of the cover plate (3) and the cover plate (3).

4. The confined space opening protection and sealing device according to claim 3, characterized in that: The locking structure comprises a movable lock hole plate arranged at the end of the "Z"-shaped component and a fixed lock hole plate (31) arranged on the cover plate (3), and the movable lock hole plate and the fixed lock hole plate (31) are respectively provided with alignable lock holes (2) for inserting locks.

5. The confined space opening protection and sealing device according to claim 1, 2 or 4, characterized in that: The clamping member (1) is an integrated structure formed by bending steel bars.

6. The confined space opening protection and sealing device according to claim 1, 2 or 4, characterized in that: A reinforcing rib (5) is provided on the lower side of the cover plate (3).

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