Manhole door anti-locking component

Abstract

An anti-locking component for a manhole door comprises a pipe fitting A and a pipe fitting B. The pipe fitting A and the pipe fitting B are of pipe sleeve structures, limiting structures for preventing insertion separation are correspondingly arranged at the insertion positions of the two sleeves, a rack is fixedly arranged in the pipe fitting A, a gear is rotationally arranged in the pipe fitting B, and the gear is meshed with the rack. A spline shaft sleeve is arranged in the middle of the gear, and an assembly hole corresponding to the spline shaft sleeve is formed in the pipe fitting B; the end of the pipe fitting A and the end of the pipe fitting B are respectively provided with a blocking piece, and the two blocking pieces are arranged in the same direction. Compared with a product in the prior art, the external structure is simpler and more convenient to carry, the problem that equipment in the prior art is inconvenient to assemble is solved, particularly, the telescopic structure can enable the equipment to adapt to manholes of different specifications, multiple purposes are achieved, and the popularization value is higher.

Description

Technical Field

[0001] The utility model relates to the field of general safety equipment, in particular to an anti-locking component for a manhole door. Background Art

[0002] Manhole doors are common in various fields. They are personnel passage doors for people to enter the interior of the equipment. Production safety accidents caused by passive closure or misoperation of manhole doors are common. Once the maintenance personnel are trapped inside the equipment, it is difficult to initiate or obtain effective rescue due to signal shielding, which ultimately causes irreparable losses. In response to the above situation, Chinese Patent Application No.: 2022206197456 discloses a manhole door anti-locking block card. The device has been widely used and promoted within the group, but it was found that the device still has technical defects during long-term use. The most important of these is that the manhole specifications adapted to the device are limited. The specifications of the block card equipment required when used in different equipment are inconsistent, and its applicability is very limited; secondly, the equipment is inconvenient to tighten. Since each component is adapted to the manhole size, the bolt part needs to be fixed with an additional large wrench, and the equipment needs to be fixed by repeatedly twisting it at the manhole position. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a manhole door anti-locking component which has a simple structure, flexible assembly arrangement, is suitable for various manhole specifications, and achieves a one-machine-multiple-purpose effect.

[0004] The equipment includes a pipe fitting A and a pipe fitting B, wherein the pipe fitting A and the pipe fitting B are of a pipe-in-pipe structure, and a limiting structure for preventing the connection from being disengaged is provided at the corresponding plug-in position of the two sleeves;

[0005] A rack is fixedly arranged in the pipe A, a gear is rotatably arranged in the pipe B, and the gear is meshed with the rack;

[0006] The middle part of the gear is a spline sleeve, and a mounting hole corresponding to the spline sleeve is opened on the pipe B;

[0007] The ends of the pipe fitting A and the pipe fitting B are respectively provided with baffles, and the two baffles are arranged in the same direction.

[0008] The effect achieved by this is that by inserting the spline key into the spline shaft and turning it, the overall extension or shortening of the pipe fitting A and pipe fitting B assembly can be achieved, and thereby the manhole door is clamped in place to prevent the manhole door from being closed by mistake.

[0009] The beneficial effects of the utility model are as follows: compared with the prior art products, the utility model has a simpler external structure and is more convenient to carry, which solves the problem of inconvenient assembly of the prior art equipment. In particular, its telescopic structure enables the equipment to adapt to manholes of different specifications, achieving multi-purpose use of one machine and having greater promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a manhole door anti-locking component described in the utility model;

[0011] Figure 2 is based on Figure 1 Viewing angle, schematic diagram of the cross-sectional assembly structure from an upward angle;

[0012] Reference numerals:

[0013] 1-Baffle 2-Fitting B 21-Gear 211-Ratchet 3-Fitting A 31-Rack 4-Spline Key 5-Flag Stand 51-Hanging Ring

[0014] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0015] Reference Figure 1 , Figure 2 The utility model discloses a manhole door anti-locking component, comprising a pipe fitting A3 and a pipe fitting B2, wherein the pipe fitting A3 and the pipe fitting B2 are of a pipe-in-pipe structure, and a limiting structure for preventing the plug-in from being disengaged is provided at the plug-in position of the two sleeves;

[0016] A rack 31 is fixedly disposed in the pipe A3, a gear 21 is rotatably disposed in the pipe B2, and the gear 21 is meshed with the rack 31;

[0017] The middle part of the gear 21 is a spline sleeve, and an assembly hole corresponding to the spline sleeve is opened on the pipe B2;

[0018] The ends of the pipe fitting A3 and the pipe fitting B2 are respectively provided with baffles 1, and the two baffles 1 are provided in the same direction.

[0019] The effect achieved by this is that by inserting the spline key 4 into the spline shaft and turning it, the overall extension or shortening of the pipe fitting A3 and the pipe fitting B2 assembly can be achieved, and thereby the manhole door is clamped in place to prevent the manhole door from being closed by mistake.

[0020] Furthermore, a flag pole 5 is fixedly provided on the outer sleeve of the pipe fitting A3 and the pipe fitting B2, and a hanging ring 51 is arranged in an array on the flag pole 5.

[0021] The effect achieved by this is that a safety warning sign is hung on the flag pole 5 .

[0022] In Example 1, the assembly hole is arranged on the bottom surface of the pipe B2; the baffle 1 is an arc-shaped baffle 1, and is arranged vertically on the bottom ends of the pipe A3 and the pipe B2.

[0023] The effect achieved by this is that the spline key 4 can only be opened from the bottom surface of the device, that is, inside the manhole door.

[0024] Preferably, the inner surface of the baffle 1 is a curved surface with a smooth transition.

[0025] In the second embodiment, a spline key 4 is fixedly disposed inside the spline sleeve, and the spline key 4 is in the form of a crank arm.

[0026] The effect achieved in this way is that there is no need to wear an additional key, and the key part is connected to the overall assembly of the device.

[0027] In Embodiment 3, a ratchet 211 is further provided on the side of the gear 21, a clutch mechanism is provided at the tail end of the ratchet 211, and the clutch mechanism is provided through the pipe B2.

[0028] The effect achieved in this way is that by twisting the gear 21, the pipe fitting A3 and the pipe fitting B2 are tightened and assembled in opposite directions; the ratchet 211 prevents the gear 21 from loosening and reversing, thereby preventing the pipe fitting A3 and the pipe fitting B2 from being stretched in opposite directions. When disengagement is required, the clutch mechanism is controlled, and reverse rotation can achieve the stretching of the pipe fitting A3 and the pipe fitting B2 in opposite directions.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A manhole door anti-locking component, comprising a pipe fitting A and a pipe fitting B, wherein the pipe fitting A and the pipe fitting B are of a pipe-in-pipe structure, and a limiting structure for preventing the plug-in from being disengaged is provided at the corresponding plug-in position of the two sleeves, characterized in that: A rack is fixedly arranged in the pipe A, a gear is rotatably arranged in the pipe B, and the gear is meshed with the rack; The middle part of the gear is a spline sleeve, and an assembly hole corresponding to the spline sleeve is opened on the pipe B; The ends of the pipe fitting A and the pipe fitting B are respectively provided with baffles, and the two baffles are arranged in the same direction.

2. The anti-locking component for a manhole door according to claim 1, characterized in that: A flag pole is fixedly arranged on the outer sleeve of the pipe fittings A and B, and a hanging ring is arranged in an array on the flag pole.

3. The anti-locking component for a manhole door according to claim 1, characterized in that: The assembly hole is arranged on the bottom surface of the pipe fitting B; the baffle is an arc-shaped baffle, and is arranged vertically on the bottom surface ends of the pipe fittings A and B.

4. The anti-locking component for a manhole door according to claim 1, characterized in that: A spline key is fixedly arranged inside the spline shaft sleeve, and the spline key is in the form of a crank arm.

5. The anti-locking component for a manhole door according to claim 1, characterized in that: A ratchet is also provided on the side of the gear, a clutch mechanism is provided at the tail end of the ratchet, and the clutch mechanism is provided through the pipe B.

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