Air door locking device

Abstract

The utility model discloses an air door locking device which comprises a lower support, a middle support and an upper support, connecting rods are arranged between the lower support and the middle support and between the middle support and the upper support respectively, a loop bar structure is installed between the lower support and the middle support, a pull rope is matched with the loop bar structure, and the upper support is connected with the middle support through the pull rope. The number of the sleeve rod structures is two, two pulleys are rotatably arranged on the inner side of the upper support, the pull rope penetrates out of the side face of the upper support after being transited through the pulleys and is connected with an air door after penetrating out, a triangular stopping block is rotatably arranged on the inner side of the middle support, and under the action of the stopping block, the pull rope is connected with the air door. Only one pull rope can be pulled out outwards; the device can play a protection role, and only one air door can be forcibly opened at a time.

Description

Technical Field

[0001] The utility model relates to a damper locking device. Background Art

[0002] According to the requirements of the "Basic Requirements and Scoring Methods for Coal Mine Safety Standardization Management System (Trial)", the dampers should be able to close and interlock automatically so that the two dampers cannot be opened at the same time. When the two dampers are opened at the same time, it will cause an airflow short circuit, resulting in insufficient air volume in other air-using locations, which can easily cause gas and coal dust accumulation and induce accidents.

[0003] In the prior art, electrically controlled dampers are used and operated by a button switch so that one damper is opened at a time. When a circuit system fails, there is a probability that such electrically controlled dampers will be opened by mistake, posing certain safety hazards.

[0004] Therefore, we designed a damper locking device based on the existing electronically controlled damper that can play a protective role and force only one damper to be opened at a time. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a damper locking device which can play a protective role and force only one damper to be opened at a time.

[0006] The utility model is realized by the following technical solutions:

[0007] A damper locking device comprises a lower bracket, a middle bracket and an upper bracket, wherein connecting rods are arranged between the lower bracket and the middle bracket, and between the middle bracket and the upper bracket, and a sleeve rod structure is installed between the lower bracket and the middle bracket, and a pull rope is cooperated with the sleeve rod structure, and two sleeve rod structures are arranged, and two pulleys are rotatably arranged on the inner side of the upper bracket. The pull rope passes through the side of the upper bracket after transition through the pulleys and is connected to the damper after passing through. A triangular blocking block is rotatably arranged on the inner side of the middle bracket, and under the action of the blocking block, only one pull rope can be pulled outward.

[0008] Preferably, the sleeve rod structure includes a sleeve rod and a movable rod, the sleeve rod is fixed between the lower bracket and the middle bracket, the movable rod is movably installed in the sleeve rod, and the end of the pull rope away from the damper is fixedly connected to the movable rod. When one of the movable rods is pulled upward, it pushes the blocking block to tilt, and the tilted blocking block blocks the top of the sleeve rod on the other side, so that the movable rod matched with the sleeve rod is confined in the sleeve rod.

[0009] Preferably, the movable rod is a solid rod.

[0010] Preferably, the movable rod is a hollow rod, the upper and lower ends of the movable rod are closed, and the interior of the movable rod is filled with lead blocks.

[0011] Preferably, a connecting plate is provided at the upper end of the movable rod, and the pull rope is fixed after passing through the connecting plate.

[0012] Preferably, a slide groove is vertically arranged on the outer wall of the sleeve rod, and a guide screw is screwed into the outer wall of the movable rod near the bottom. The guide screw fits in the slide groove and slides vertically along the slide groove. The upper and lower ends of the slide groove are closed.

[0013] Preferably, the blocking block is an isosceles triangle or an equilateral triangle.

[0014] The beneficial effects of the utility model are:

[0015] The device is composed of two sleeve rod structures and two pull ropes, the ends of the pull ropes are connected to the air door, when the air door is opened, the pull ropes are pulled, so that the movable rod is pulled out to the outside of the sleeve rod, and the pulled movable rod pushes the blocking block to tilt, so that the blocking block forms a blockage above the sleeve rod on the other side, and the pull rope on the other side is pulled at this time, the upper end of the movable rod is limited, so that the movable rod cannot be pulled out, and effective limiting is completed. Under the action of this device, only one air door can be opened at a time, and two doors cannot be opened at the same time, thereby avoiding the occurrence of coal mine accidents; and the structure of this device is relatively simple, the cost is relatively low, and it is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is the enlarged view of point A;

[0019] Figure 3 This is an enlarged view of point B;

[0020] Figure 4 It is a schematic diagram of the movable rod being pulled out;

[0021] Figure 5 This is an enlarged view of point C. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "set", "socket", "connect", "penetrate", "plug in" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 , Figure 2 and Figure 3A damper locking device is shown, comprising a lower bracket 1, a middle bracket 2 and an upper bracket 3, a connecting rod 4 is arranged between the lower bracket 1 and the middle bracket 2, and between the middle bracket 2 and the upper bracket 3, the connecting rod 4 is fixed to the upper bracket 1, the middle bracket and the upper bracket 3 by welding, a sleeve rod structure 5 is installed between the lower bracket 1 and the middle bracket 2, a pull rope 6 is cooperated with the sleeve rod structure 5, two sleeve rod structures 5 are arranged, two pulleys 31 are rotatably arranged on the inner side of the upper bracket 3, the pull rope 6 passes through the side of the upper bracket 3 after transition through the pulley 31, and is connected to the damper after passing through, a triangular blocking block 7 is rotatably arranged on the inner side of the middle bracket 2, under the action of the blocking block 7, only one of the pull ropes can be pulled outward.

[0028] In the above technical solution, the outward stretching limit of the sleeve rod structure 5 on one side can be achieved by a simple blocking block 7, so that only one pull rope 6 is allowed to be pulled out at a time.

[0029] The dampers are connected by the pull rope 6 so that only one damper on one side can be opened at a time, and the two dampers will not be opened at the same time.

[0030] See also Figures 2 to 5 As shown, the sleeve rod structure 5 includes a sleeve rod 51 and a movable rod 52, the sleeve rod 51 is fixed between the lower bracket 1 and the middle bracket 2, the movable rod 52 is movably installed in the sleeve rod 51, and the end of the pull rope 6 away from the damper is fixedly connected to the movable rod 52. When one of the movable rods 52 is pulled upward, it pushes the blocking block 7 to tilt, and the tilted blocking block 7 blocks the top of the sleeve rod 51 on the other side, so that the movable rod 52 matched with the sleeve rod 51 is confined in the sleeve rod 51.

[0031] In the above technical solution, the movable rod 52 slides vertically along the sleeve rod 51. When the damper is opened, the pull rope pulls the movable rod 52 on one side to move upward. When the damper is closed, the movable rod 52 falls back under the action of gravity.

[0032] The movable rod 52 is a hollow rod, the upper and lower ends of the movable rod 52 are closed, and the interior is filled with lead blocks (not shown).

[0033] In the above technical solution, the movable rod 52 is weighted by a lead block, so that under the counterweight of the movable rod 52, the damper is pulled to achieve self-locking.

[0034] See also Figure 4 As shown, a connecting plate 552 is provided at the upper end of the movable rod 52, and the pull rope 6 passes through the connecting plate 552 and is fixed.

[0035] This structure facilitates fixing the draw cord 552 .

[0036] See also Figure 2 , Figure 4 and Figure 5 As shown, a slide groove 551 is vertically arranged on the outer wall of the sleeve rod 51, and a guide screw 553 is screwed into the outer wall of the movable rod 52 near the bottom. The guide screw 553 is fitted in the slide groove 551 and slides vertically along the slide groove 551. The upper and lower ends of the slide groove 551 are closed.

[0037] The above technical solution can limit the opening of the damper. When the guide screw 553 slides upward along the slide slot 551 to the limit, the pull rope 6 cannot be pulled further, and the opening angle of the damper is limited.

[0038] The blocking block 7 is an isosceles triangle.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A damper locking device, characterized in that: It includes a lower bracket, a middle bracket and an upper bracket, and connecting rods are provided between the lower bracket and the middle bracket, and between the middle bracket and the upper bracket. A sleeve rod structure is installed between the lower bracket and the middle bracket, and a pull rope is cooperated with the sleeve rod structure. Two sleeve rod structures are provided, and two pulleys are rotatably provided on the inner side of the upper bracket. The pull rope passes through the side of the upper bracket after transition through the pulleys and is connected to the air door after passing through. A triangular blocking block is rotatably provided on the inner side of the middle bracket. Under the action of the blocking block, only one pull rope can be pulled out.

2. The damper locking device according to claim 1, characterized in that: The sleeve rod structure includes a sleeve rod and a movable rod, the sleeve rod is fixed between the lower bracket and the middle bracket, the movable rod is movably installed in the sleeve rod, the end of the pull rope away from the damper is fixedly connected to the movable rod, when one of the movable rods is pulled upward, it pushes the blocking block to tilt, and the tilted blocking block blocks the top of the sleeve rod on the other side, so that the movable rod matched with the sleeve rod is confined in the sleeve rod.

3. The damper locking device according to claim 2, characterized in that: The movable rod is a solid rod.

4. The damper locking device according to claim 3, characterized in that: The movable rod is a hollow rod, the upper and lower ends of the movable rod are closed, and the interior of the movable rod is filled with lead blocks.

5. The damper locking device according to claim 2, characterized in that: A connecting plate is provided at the upper end of the movable rod, and the pull rope is fixed after passing through the connecting plate.

6. The damper locking device according to claim 2, characterized in that: A slide groove is vertically arranged on the outer wall of the sleeve rod, and a guide screw is screwed into the outer wall of the movable rod near the bottom. The guide screw is fitted in the slide groove and slides vertically along the slide groove. The upper and lower ends of the slide groove are closed.

7. The damper locking device according to claim 1, characterized in that: The blocking block is an isosceles triangle or an equilateral triangle.

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