Warning device for manhole door

Abstract

The utility model discloses a kind of warning devices for manhole door, including two mounting discs, mounting disc is fixedly installed with magnetic attraction piece, one mounting disc is fixedly installed with audible light alarm, one mounting disc is fixedly installed with person in sensor, one mounting disc is installed with protective net, protective net other end is detachably installed in another mounting disc, when installing, mounting disc is located at the both sides of manhole door, protective net covers the upper of manhole door.The utility model is reminded to the person who approaches by setting audible light alarm and person in sensor, and barrier is formed on the upper of manhole door by protective net, reduce the possibility of danger when unrelated personnel pass through maintenance position.

Description

Technical Field

[0001] This utility model belongs to the technical field of warning devices, and relates to a warning device for maintenance manhole doors. Background Technology

[0002] A maintenance manhole is a specially designed access point for maintenance personnel to enter and perform maintenance. For example, a boiler maintenance manhole is typically a round opening located on the top of the equipment and fitted with a round cover to seal it.

[0003] To reduce the risk of personnel falling through open manholes during maintenance, safety devices are placed above them. These devices are typically steel mesh structures made of interlocking steel bars, placed above the manholes to prevent falls. However, the lighting above boilers is often poor, making it easy for other workers to enter the manhole area and create a dangerous situation. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a warning device for maintenance manhole doors, which effectively solves the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A warning device for maintenance manhole doors, comprising:

[0007] Installation disks, two of which are provided;

[0008] Magnetic blocks are fixedly installed on each of the mounting plates;

[0009] An audible and visual alarm light, wherein the audible and visual alarm light is fixedly installed on one of the mounting plates;

[0010] A person is positioned on the sensor, and the person is fixedly mounted on one of the mounting plates.

[0011] A protective net, wherein the protective net is installed on one of the mounting plates, and the other end of the protective net is detachably installed on the other mounting plate;

[0012] During installation, the mounting plate is located on both sides of the manhole door, and the protective net covers the top of the manhole door.

[0013] Optionally, the protective net includes multiple telescopic rods, the first end of which is hinged to one of the mounting plates, and a slot is provided at a corresponding position on the other mounting plate, and the second end of which is inserted into the slot.

[0014] Optionally, the protective net includes multiple take-up assemblies, with a warning tape wound around the output end of each take-up assembly, and a magnetic attractor fixedly installed at the end of the warning tape away from the take-up assembly.

[0015] Optionally, the take-up assembly includes:

[0016] The outer casing is fixedly mounted on the mounting plate;

[0017] A winding rod, which is rotatably mounted within the housing;

[0018] A spiral spring, wherein spiral springs are installed at both ends of the winding rod and the spiral springs are connected to the outer shell;

[0019] The warning tape is wound around the winding rod.

[0020] Optionally, the protective net is fixedly provided with reflective strips.

[0021] Optionally, the mounting plate is rotatably mounted with a mounting base, and a support plate is fixedly mounted on the upper end of the mounting base. The person is rotatably mounted on the support plate.

[0022] Optionally, the mounting plate is equipped with a lifting device, the lifting device comprising:

[0023] Mounting holes are provided in the mounting plate;

[0024] A cam, which is rotatably mounted in the mounting hole;

[0025] A lever is rotatably mounted at the mounting hole position, and the lever drives the cam to rotate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By setting up audible and visual alarm lights and human sensors to alert people who are approaching, and by using a protective net above the manhole door to form a barrier, the possibility of danger when unauthorized personnel pass through the maintenance area can be reduced;

[0028] 2. The manhole door may be horizontal or perpendicular to the mounting surface of the mounting plate. By setting the mounting base and support plate, people can rotate in two directions at the sensor's detection end and face different directions, making it suitable for different installation positions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0030] Figure 2This is a schematic diagram of the overall structure of another embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the take-up assembly in an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the lifting component in an embodiment of the present utility model.

[0033] Reference numerals: 1. Mounting plate; 2. Magnetic block; 3. Audible and visual alarm light; 4. Person sensor; 41. Mounting base; 42. Support plate; 5. Protective net; 51. Telescopic rod; 52. Slot; 53. Cable reel assembly; 531. Housing; 532. Winding rod; 533. Spiral spring; 54. Warning tape; 55. Magnetic component; 6. Lifting component; 61. Mounting hole; 62. Cam; 63. Hand lever. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1 and Figure 2 This utility model discloses a warning device for inspecting a manhole door, comprising two mounting plates 1, each mounting plate 1 having a magnetic block 2 fixedly mounted thereon, one mounting plate 1 having an audible and visual alarm light 3 fixedly mounted thereon, one mounting plate 1 having a person presence sensor 4 fixedly mounted thereon, and one mounting plate 1 having a protective net 5 mounted thereon. The other end of the protective net 5 is detachably mounted to the other mounting plate 1. During installation, the mounting plates 1 are located on both sides of the manhole door, and the protective net 5 covers the top of the manhole door.

[0036] Specifically, the boiler manhole is surrounded by an iron structure. Two mounting plates 1 are installed, and magnetic blocks 2 are installed on the mounting plates 1. The magnetic blocks 2 attach the mounting plates 1 to both sides of the manhole. The mounting plates 1 are equipped with audible and visual alarm lights 3 and human presence sensors 4. When unauthorized personnel approach into the detection range of the human presence sensor 4, the audible and visual alarm lights 3 will flash and buzz to warn of the situation. One end of the protective net 5 is installed on the mounting plate 1, and the other end is detachably installed on the other mounting plate 1, allowing maintenance personnel to open and close the protective net 5 before and after entering the manhole.

[0037] In this way, by setting up audible and visual alarm lights 3 and human sensor 4 to remind people who are approaching, and by forming a barrier above the manhole door with protective netting 5, the possibility of danger when unauthorized personnel pass through the maintenance position is reduced.

[0038] In some feasible embodiments, the mounting plate 1 includes two mirror-symmetrically arranged box-shaped components, which are connected by bolts to form a placement space. The magnetic block 2, the audible and visual alarm light 3, and the control circuit of the human sensor 4 are fixedly installed within this space. For ease of use in locations away from power sources, a built-in battery can also be installed within the placement space to power the audible and visual alarm light 3, the human sensor 4, and their control circuit. Manhole doors are mostly circular; in this embodiment, the mounting plate 1 is crescent-shaped, but it can also be set to other shapes depending on the actual shape of the manhole door. To ensure secure adhesion, multiple magnetic blocks 2 are arranged in different positions.

[0039] The magnetic block 2 can be a neodymium magnet, and the human presence sensor 4 can be an infrared sensor or a radar sensor, etc. Human presence sensors are existing technologies widely used in smart lighting products, and the audible and visual alarm light 3 is also a mature product, so it will not be described further here. Additionally, a speaker module can be installed on the mounting plate 1, and warning voice prompts can be recorded into the speaker.

[0040] The protective net 5 can be made of steel mesh, with one end of the steel mesh hinged to the mounting plate 1 and the other end equipped with a hook. A hanging ring that matches the hook is provided on another mounting plate 1.

[0041] As a specific embodiment of the warning device for maintenance manhole provided in the application, the protective net 5 includes multiple telescopic rods 51. The first end of the telescopic rod 51 is hinged to one of the mounting plates 1, and a slot 52 is opened at the corresponding position of the other mounting plate 1. The second end of the telescopic rod 51 is inserted into the slot 52.

[0042] Based on specific usage scenarios, by setting up the telescopic rod 51, on the one hand, the rigid structure improves the protection, and on the other hand, the telescopic structure of the telescopic rod 51 can be adapted to the use of manhole doors of different sizes.

[0043] In some feasible embodiments, multiple telescopic rods 51 are connected at one end near the slot 52 by a connecting rod, with handles fixedly connected to both sides of the connecting rod for easy opening and closing. The telescopic rods 51 can also be automatically telescopic rods such as electric actuators, which, in conjunction with the human sensor 4, automatically extend to close the manhole when a person approaches.

[0044] As another specific embodiment of the warning device for maintenance manhole doors provided in the application, please refer to Figure 2 and Figure 3The protective net 5 includes multiple take-up assemblies 53. A warning tape 54 is wound around the output end of the take-up assembly 53. A magnetic attractor 55 is fixedly installed at the end of the warning tape 54 away from the take-up assembly 53.

[0045] Based on specific usage scenarios, the cable retraction component 53 and the warning tape 54 are set to facilitate use at the locations of manholes of different sizes. At the same time, the cable retraction component 53 automatically retracts the warning tape 54, which facilitates the opening of the protective net 5.

[0046] In some feasible embodiments, the take-up assembly 53 includes a housing 531, a winding rod 532, and a spiral spring 533. The housing 531 is cylindrical and is fixedly mounted on the mounting plate 1. Both ends of the housing 531 are threaded or snap-fitted with caps. One end of the spiral spring 533 is fixedly connected to the cap, and a mounting ring is fixedly provided inside the cap. The winding rod 532 is rotatably inserted into the mounting ring. A rectangular groove is provided at the end of the winding rod 532 to engage the spiral spring 533. One end of the warning tape 54 is fixed to the winding rod 532. When the warning tape 54 is pulled out, the spiral spring 533 retracts and is attracted to another mounting plate 1 by a magnetic attraction 55. When the warning tape 54 is detached from the attraction, the spiral spring 533 resets, causing the winding rod 532 to rotate and retract the warning tape 54.

[0047] As one specific embodiment of the warning device for maintenance manhole doors provided in the application, the protective net 5 is fixedly equipped with reflective strips.

[0048] In some feasible ways, the warning tape 54 can be made of reflective fabric, and the telescopic pole 51 can be made of reflective tape bonded to the outside.

[0049] As one specific embodiment of the warning device for maintenance manhole provided in the application, the mounting plate 1 is rotatably mounted with a mounting base 41, and a support plate 42 is fixedly mounted on the upper end of the mounting base 41. The human sensor 4 is rotatably mounted on the support plate 42.

[0050] Depending on the specific usage environment, the manhole door may be horizontal or perpendicular to the mounting surface of the mounting plate 1. By setting the mounting base 41 and the support plate 42, a person can rotate in two directions at the detection end of the sensor 4 and face different directions, which is suitable for use in different installation positions.

[0051] In some feasible configurations, the mounting plate 1 may have a through hole, with a ring fixedly mounted on the outside of the through hole. A cylindrical mounting base 41 is fitted onto the ring, and a rubber ring is fixedly connected to the outside of the ring. The rubber ring creates damping between the ring and the mounting base 41, allowing the mounting base 41 to stop at its rotated position. The support plate 42 is a plate with a through hole. A cylinder is fixedly connected to the detection end of the human sensor 4, and the cylinder is rotatably mounted within the through hole of the support plate 42. A rubber ring is also provided inside the through hole. A through hole may be provided in the middle of the mounting base 41 to facilitate the connection of the signal line to the detection end of the human sensor 4. To facilitate detection in multiple directions, at least two human sensors 4 are provided.

[0052] As one specific embodiment of the warning device for maintenance manhole doors provided in the application, please refer to Figure 2 and Figure 4 The mounting plate 1 is equipped with a lifting component 6, which includes a mounting hole 61, a cam 62 and a pull rod 63. The mounting hole 61 is opened in the mounting plate 1, the cam 62 is rotatably mounted in the mounting hole 61, and the pull rod 63 is rotatably mounted in the position of the mounting hole 61. The pull rod 63 drives the cam 62 to rotate.

[0053] It should be understood that when the mounting plate 1 is attached to the boiler by the magnetic block 2, the mounting plate 1 may be easily disassembled due to excessive adsorption force or flat adsorption surface. By setting up the lifting component 6, the hand lever 63 drives the cam 62 to rotate, and the rotation of the cam 62 lifts the mounting plate 1 to facilitate disassembly.

[0054] In some feasible embodiments, the outer side of the base circle of the cam 62 is configured as a gear, and the end of the hand lever 63 near the rotating shaft is configured as a gear that meshes with the outer side of the base circle. The gear is fixedly connected to a cylindrical rod. When the cylindrical rod is pulled to rotate the hand lever 63, the gear drives the base circle to rotate, causing the cam 62 to rotate and lift the mounting plate 1.

[0055] In some feasible ways, the base circle of cam 62 can be rotatably mounted on the upper end of mounting hole 61, and the rotating shaft of hand lever 63 is fixedly connected to the rotating shaft of cam 62.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A warning device for a manhole door under repair, characterized in that, include: Installation disk (1), wherein two installation disks (1) are provided; Magnetic blocks (2) are fixedly installed on the mounting plates (1); A sound and light alarm light (3) is fixedly installed on one of the mounting plates (1); A person is mounted on a sensor (4), which is fixedly installed on one of the mounting plates (1); A protective net (5) is installed on one of the mounting plates (1), and the other end of the protective net is detachably installed on the other mounting plate (1); During installation, the mounting plate (1) is located on both sides of the manhole door, and the protective net (5) covers the top of the manhole door.

2. A warning device for a manhole door according to claim 1, characterized in that: The protective net (5) includes multiple telescopic rods (51). The first end of the telescopic rod (51) is hinged to one of the mounting plates (1), and the other mounting plate (1) has a slot (52) at a corresponding position. The second end of the telescopic rod (51) is inserted into the slot (52).

3. A warning device for a manhole door according to claim 1, characterized in that: The protective net (5) includes multiple take-up assemblies (53), and a warning tape (54) is wound around the output end of the take-up assembly (53). A magnetic suction element (55) is fixedly installed on the end of the warning tape (54) away from the take-up assembly (53).

4. The warning device for a maintenance manhole door according to claim 3, characterized in that: The take-up assembly (53) includes: The outer casing (531) is fixedly mounted on the mounting plate (1); A winding rod (532) is rotatably mounted inside the housing (531); A spiral spring (533) is mounted on both ends of the winding rod (532), and the spiral spring (533) is connected to the outer shell (531). The warning tape (54) is wound around the winding rod (532).

5. A warning device for a manhole door according to any one of claims 3-4, characterized in that: The protective net (5) is fixedly equipped with reflective strips.

6. A warning device for a manhole door according to claim 1, characterized in that: The mounting plate (1) is rotatably mounted with a mounting base (41), and a support plate (42) is fixedly mounted on the upper end of the mounting base (41). The person sensor (4) is rotatably mounted on the support plate (42).

7. A warning device for a manhole door according to claim 1, characterized in that: The mounting plate (1) is equipped with a lifting device (6), which includes: Mounting hole (61) is provided in the mounting plate (1); A cam (62) is rotatably mounted in the mounting hole (61); A lever (63) is rotatably mounted in the mounting hole (61) and drives the cam (62) to rotate.

Images