Anti-closing device for metal access door

Abstract

A metal access door anti-closing device comprises a door hole, a cover plate, a rotating shaft and a limiting plate, a supporting arm on the cover plate is connected with the rotating shaft, the limiting plate rotates around the rotating shaft, the rotating shaft is matched with a lug in a rotating mode to drive the cover plate to open and close the door hole, and after the door hole is opened by a certain degree, a locking pin penetrates through the limiting plate to be connected with the supporting arm in an inserted mode for limiting. The cover plate is prevented from closing the door hole under the action of external force, the safety during operation is improved, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety opening and closing, and relates to a metal access door anti-closing device. Background Technique

[0002] An access door is provided in the elbow pipe section of a hydropower station, which is hinged and axially opened and closed. After the elbow pipe access door is opened, the staff can enter the elbow pipe section through the access door to carry out relevant work. At present, after the access door is opened, a hoist is used to hang it to prevent the door from closing, and the staff can enter and exit accordingly. Considering the safety of the hoist or accidental closing of the access door, at this time, people are entering and exiting, or there are people constructing in the elbow pipe section, there are potential safety hazards.

[0003] Secondly, as a key component for hanging the hoist and the access door, the hook is long-term exposed to the humid environment of the hydropower station and is easily affected by corrosion and rust. Rust not only reduces the strength and load-bearing capacity of the hook, but may also cause it to suddenly break during use, which may lead to the serious consequence that the access door suddenly closes due to the loss of suspension. The hoist, as an important device for lifting and hanging the access door, the stability and reliability of its performance are directly related to the safe use of the access door. However, during actual use, the hoist may experience faults such as chain slipping and failure, resulting in the inability to effectively hang the access door or suddenly failing during the hanging process, which may lead to the risk of abnormal closing of the access door. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a metal access door anti-closing device, which can ensure that the door hole can be stably maintained at the required working opening after being opened, and will not suddenly close due to external factors, thereby protecting the lives of the staff when entering and exiting the elbow pipe section and carrying out relevant work, and reducing potential safety hazards and accident risks.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a metal access door anti-closing device, which includes a door hole, a cover plate, a rotating shaft and a limiting plate; the cover plate is matched with the door hole for sealing, the rotating shaft is rotationally matched with the ear seat outside the door hole, the support arm on the cover plate is fixedly connected with the rotating shaft, the limiting plate is located at the end of the rotating shaft and is rotationally matched with it and is inserted and connected with the support arm through a locking pin; the rotation of the rotating shaft drives the cover plate to rotate to adjust the opening of the door hole.

[0006] The door hole is connected with the bottom plate and the rib plate to form an integral structure; the rib plate divides the bottom plate into multiple upper-open squares; two ear seats are fixedly connected with the outer wall of the door hole.

[0007] A plurality of annularly arranged connecting holes are provided on the upper side of the door hole; the connecting holes correspond to the through holes on the cover plate one by one.

[0008] A cross-shaped support plate is arranged inside the cover plate and connected to the orifice plate, and two support arms are connected to the side edge of the cover plate; the diameter of the orifice plate is smaller than the diameter of the door hole.

[0009] The limiting plate is a bent plate with an included angle greater than 90°, and the included angle direction faces the outer wall of the door hole.

[0010] A plurality of pin holes for cooperating with the locking pin are arranged on the limiting plate, and a plurality of insertion holes are arranged on the support arm, and the locking pin is inserted into the insertion hole.

[0011] The main beneficial effects of the present utility model are as follows:

[0012] The support arm on the cover plate is connected to the rotating shaft, the limiting plate rotates around the rotating shaft, and the rotating shaft rotates with the ear seat to drive the cover plate to open and close the door hole. When the door hole is opened to a certain degree, the locking pin passes through the limiting plate and is inserted and connected with the support arm for limiting, preventing the cover plate from closing the door hole under the action of external force, improving the safety during operation, and being simple and convenient to operate.

[0013] After the cover plate is opened, the locking pin passes through the limiting plate and is inserted and connected with the support arm. At this time, since the included angle of the limiting plate is greater than 90°, one end of the limiting plate forms a fixed state with the support arm, and the other end of the limiting plate abuts against the bottom plate on the door hole, forcing the cover plate to tilt only in the direction away from the door hole, thereby avoiding the cover plate from closing the door hole under the action of external force and improving the safety during operation. Description of the Drawings

[0014] The present utility model will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 It is an axonometric structure schematic diagram of the present utility model.

[0016] Figure 2 It is another axonometric structure schematic diagram of the present utility model.

[0017] In the figure: door hole 1; bottom plate 11; rib plate 12; ear seat 13; connection hole 14; cover plate 2; through hole 21; cross-shaped support plate 22; orifice plate 23; support arm 24; rotating shaft 3; limiting plate 4; locking pin 5. Detailed Embodiment

[0018] Such as Figures 1 to 2In a metal access door anti - closing device, it includes a door hole 1, a cover plate 2, a rotating shaft 3 and a limit plate 4; the cover plate 2 is cooperated with the door hole 1 for sealing, the rotating shaft 3 is rotatably cooperated with the ear seats 13 outside the door hole 1, the support arm 24 on the cover plate 2 is fixedly connected with the rotating shaft 3, the limit plate 4 is located at the end of the rotating shaft 3 and is rotatably cooperated with it, and is connected with the support arm 24 by a locking pin 5 in an inserted connection; the rotation of the rotating shaft 3 drives the cover plate 2 to rotate to adjust the opening degree of the door hole 1. Through the connection between the support arm 24 on the cover plate 2 and the rotating shaft 3, the limit plate 4 rotates around the rotating shaft 3, and the rotating shaft 3 is rotatably cooperated with the ear seats 13 to drive the cover plate 2 to open and close the door hole 1. After the door hole 1 is opened to a certain degree, the locking pin 5 passes through the limit plate 4 and is inserted into the support arm 24 for limiting, preventing the cover plate 2 from closing the door hole 1 under the action of external force, improving the safety during operation, and the operation is simple and convenient.

[0019] In a preferred solution, the door hole 1 is connected with the bottom plate 11 and the rib plate 12 to form an integral structure; the rib plate 12 divides the bottom plate 11 into multiple grids with open upper ends; two ear seats 13 are fixedly connected with the outer wall of the door hole 1. During use, the rib plate 12 arranged on the bottom plate 11 increases the overall structural strength.

[0020] In a preferred solution, a plurality of connection holes 14 are arranged in a circular pattern on the upper side of the door hole 1; the connection holes 14 correspond one - to - one with the through holes 21 on the cover plate 2. During use, after the cover plate 2 and the door hole 1 are cooperated and closed, fasteners are used to pass through the through holes 21 on the cover plate 2 and are connected and fixed with the connection holes 14 on the door hole 1.

[0021] In a preferred solution, a cross - shaped support plate 22 is arranged inside the cover plate 2 and is connected with the orifice plate 23, and two support arms 24 are connected with the side edges of the cover plate 2; the diameter of the orifice plate 23 is smaller than the diameter of the door hole 1. During use, the connection between the cross - shaped support plate 22 and the orifice plate 23 increases the overall structural strength, and at the same time, after the cover plate 2 is closed, the orifice plate 23 can extend into the door hole 1.

[0022] In a preferred solution, the limit plate 4 is a bent plate with an included angle greater than 90°, and the included - angle direction faces the outer wall of the door hole 1. During use, after the cover plate 2 is opened, the locking pin 5 is used to pass through the limit plate 4 and is inserted into the support arm 24. At this time, due to the included angle of the limit plate 4 being greater than 90°, one end of the limit plate 4 forms a fixed state with the support arm 24, and the other end of the limit plate 4 abuts against the bottom plate 11 on the door hole 1, forcing the cover plate 2 to tilt only in the direction away from the door hole 1, thus avoiding the cover plate 2 from closing the door hole 1 under the action of external force and improving the safety during operation.

[0023] In a preferred embodiment, a plurality of pin holes adapted to cooperate with the locking pin 5 are provided on the limit plate 4, and a plurality of insertion holes are provided on the support arm 24. The locking pin 5 is inserted into the insertion holes. During use, each pin hole and each insertion hole correspond to different opening degrees. According to actual needs, after the cover plate 2 is flipped, the pin hole and the insertion hole corresponding to the opening degree can be selected to cooperate with the locking pin 5.

[0024] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A metal door anti-closing device, characterized by: It comprises a door hole (1), a cover plate (2), a rotating shaft (3) and a limiting plate (4); the cover plate (2) and the door hole (1) are sealed together, the rotating shaft (3) and the ear seat (13) on the outside of the door hole (1) are rotatably matched, the support arm (24) on the cover plate (2) is fixedly connected to the rotating shaft (3), the limiting plate (4) is located at the end of the rotating shaft (3) and is rotatably matched therewith and is plug-connected to the support arm (24) via a locking pin (5); the rotating shaft (3) rotates to drive the cover plate (2) to rotate and adjust the opening of the door hole (1).

2. The metal door anti-closing device according to claim 1 is characterized in that: The door hole (1) is connected to the bottom plate (11) and the rib plate (12) to form an integral structure; the rib plate (12) divides the bottom plate (11) into a plurality of square grids with upper ends open; and the two ear seats (13) are fixedly connected to the outer wall of the door hole (1).

3. The metal door anti-closing device according to claim 1 is characterized in that: A plurality of connection holes (14) arranged in a ring shape are provided on the upper side of the door hole (1); the connection holes (14) correspond one-to-one to the through holes (21) on the cover plate (2).

4. The metal door anti-closing device according to claim 1 is characterized in that: A cross support plate (22) is arranged on the inner side of the cover plate (2) and is connected to the orifice plate (23); two support arms (24) are connected to the side edges of the cover plate (2); and the diameter of the orifice plate (23) is smaller than the diameter of the door hole (1).

5. The metal door anti-closing device according to claim 1 is characterized in that: The limiting plate (4) is a bent plate with an angle greater than 90°, and the direction of the angle faces the outer wall of the door hole (1).

6. The metal door anti-closing device according to claim 1, characterized in that: The limiting plate (4) is provided with a plurality of pin holes that cooperate with the locking pin (5), and the support arm (24) is provided with a plurality of plugging holes, and the locking pin (5) is plugged into the plugging holes.

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