Flexible limiting device for bin door

Abstract

This utility model relates to the field of production equipment control technology, specifically a flexible limiting device for a silo opening and closing door. It includes a silo with a left and right silo opening and closing door at the bottom. A fixed pulley is mounted on the upper steel structure of the building structure on one side of the right silo opening and closing door, and a limiting fixing frame is mounted on the lower steel structure opposite the fixed pulley. An upper limit switch and a lower limit switch are vertically mounted on the limiting fixing frame. A steel wire rope is connected to the right silo opening and closing door, passing over the fixed pulley and through the limiting fixing frame. The end of the steel wire rope is located below the lower limit switch and connected to a counterweight. A limit stop is mounted on the steel wire rope. During the opening and closing of the right silo opening and closing door, the steel wire rope drives the limit stop to trigger either the upper or lower limit switch. By using the steel wire rope to drive the limit stop to move vertically, triggering the upper or lower limit switch, the limiting structure can move away from the silo door, thus avoiding the problem of accidental triggering or dust accumulation due to material in the existing limiting structure.

Description

Technical Field

[0001] This utility model relates to the field of production equipment control technology, specifically a flexible limiting device for the opening and closing of a silo door. Background Technology

[0002] Material silos are mainly used in feeding systems to store materials, including solids, sand, alloys, etc. The operation process usually involves a cylinder or hydraulic cylinder driving the silo door to close and release the material. Silo doors are mostly of the semi-circular opening and closing type or the slide-plate opening and closing type. The limit switches that control the silo door stroke are usually proximity switches or limit switches welded to the vicinity of the silo door. However, the current limit switch type has drawbacks. For example, limit switches are easily triggered by solid materials, and proximity switches are easily triggered by alloy materials. In addition, both types of switches are close to the silo door, resulting in serious dust accumulation and increasing personnel maintenance costs. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a solution.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A flexible limiting device for a silo opening and closing door includes a silo with a left silo opening and closing door and a right silo opening and closing door at the bottom of the silo. A fixed pulley is installed on the upper steel structure of the building structure on one side of the right silo opening and closing door, and a limiting fixing frame is installed on the lower steel structure of the building structure on the other side opposite to the fixed pulley. An upper limit switch and a lower limit switch are arranged at intervals along the vertical direction on the limiting fixing frame. A steel wire rope is connected to the right silo opening and closing door, and the steel wire rope passes around the fixed pulley and enters the limiting fixing frame. The end of the steel wire rope is located below the lower limit switch and is connected to a counterweight. A limit stop is installed on the steel wire rope. During the opening and closing of the right silo opening and closing door, the steel wire rope drives the limit stop to move vertically, thereby triggering the upper limit switch or the lower limit switch.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0007] The upper and lower limit switches are installed on the limit fixing frame on one side of the silo. The steel wire rope transmission structure drives the limit stop to move vertically, thereby triggering the upper or lower limit switch. This allows the limit structure to move away from the silo door, thus avoiding the existing limit structure from being accidentally triggered by materials or accumulating dust.

[0008] As a preferred embodiment, a further technical solution of this utility model is:

[0009] Preferably, a slide rail is vertically provided on the limiting and fixing frame, a slider is slidably provided on the slide rail, and a limiting stop is fixed on the slider.

[0010] Preferably, the upper limit switch and the lower limit switch are proximity switches. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of the silo door in the closed state in an embodiment of this utility model;

[0012] Figure 2 This is a structural schematic diagram of the silo door in the open state in an embodiment of this utility model.

[0013] Explanation of reference numerals in the attached diagram: 1. Hopper; 2. Left hopper opening / closing door; 3. Right hopper opening / closing door; 4. Upper steel structure; 5. Fixed pulley; 6. Lower steel structure; 7. Limiting bracket; 8. Upper limit switch; 9. Lower limit switch; 10. Steel wire rope; 11. Counterweight; 12. Limit stop. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0015] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a flexible limiting device for the opening and closing of a silo, including a silo 1. The bottom of the silo 1 is provided with a left silo opening and closing door 2 and a right silo opening and closing door 3. A fixed pulley 5 is provided on the upper steel structure 4 of the building structure on one side of the right silo opening and closing door 3. A limiting fixing frame 7 is provided on the lower steel structure 6 of the building structure on one side, opposite to the fixed pulley 5. An upper limit switch 8 and a lower limit switch 9 are arranged vertically at intervals on the limiting fixing frame 7. A steel wire rope 10 is connected to the right silo opening and closing door 3. The steel wire rope 10 passes around the fixed pulley and passes through the limiting fixing frame 7. The end of the steel wire rope 10 is located below the lower limit switch 9 and is connected to a counterweight 11. A limiting stop 12 is installed on the steel wire rope 10. During the opening and closing of the right silo opening and closing door 3, the steel wire rope 10 drives the limiting stop 12 to move vertically, thereby triggering the upper limit switch 8 or the lower limit switch 9.

[0016] In practice, a fixing ring can be welded onto the right hopper opening and closing door 3. The wire rope 10 passes through the fixing ring and is folded in half. It is then locked using a wire rope lock to form a rope buckle connected to the fixing ring. The installation height of the fixed pulley 5 is approximately the same as the height of the fixing ring.

[0017] The limit fixing frame 7 is vertically equipped with a slide rail, and a slider is slidably mounted on the slide rail. The limit stop 12 is fixed on the slider. This can prevent the limit stop 12 from failing to trigger the upper and lower limit switches due to the swaying of the wire rope 10 during the lifting process.

[0018] The upper limit switch 8 and the lower limit switch 9 are proximity switches. During the opening of the right hopper opening and closing door 3, the wire rope 10 drives the limit stop 12 to descend. When the limit stop 12 approaches the lower limit switch 9, it triggers the lower limit switch 9, thus determining that the right hopper opening and closing door 3 is fully open. During the closing of the right hopper opening and closing door 3, the wire rope 10 drives the limit stop 12 to rise. When the limit stop 12 approaches the upper limit switch 8, it triggers the upper limit switch 8, thus determining that the right hopper opening and closing door 3 is fully closed.

[0019] The solution provided by this utility model is that the upper and lower limit switches are installed on the limit fixing frame on one side of the silo. The steel wire rope transmission structure drives the limit stop to move vertically, thereby triggering the upper or lower limit switch. This allows the limit structure to move away from the silo door, thus avoiding the phenomenon of the existing limit structure being accidentally triggered by materials or accumulating dust.

[0020] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A flexible limiting device for a bin door, comprising a bin, a left bin door and a right bin door are arranged at the bottom of the bin, characterized in that, A fixed pulley is installed on the upper steel structure of the building structure on one side of the right hopper opening and closing door. A limit fixing frame is installed on the lower steel structure of the building structure on the other side, opposite to the fixed pulley. An upper limit switch and a lower limit switch are installed at intervals along the vertical direction on the limit fixing frame. A steel wire rope is connected to the right hopper opening and closing door. The steel wire rope passes around the fixed pulley and enters the limit fixing frame. The end of the steel wire rope is located below the lower limit switch and is connected to a counterweight. A limit stop is installed on the steel wire rope. During the opening and closing of the right hopper opening and closing door, the steel wire rope drives the limit stop to move vertically, thereby triggering the upper limit switch or the lower limit switch.

2. The flexible stop for a bin door according to claim 1, wherein, The limit fixing frame is vertically equipped with a slide rail, and a slider is slidably mounted on the slide rail. The limit stop is fixed on the slider.

3. The flexible stop for a bin door according to claim 1, wherein, The upper limit switch and the lower limit switch are proximity switches.

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