Monorail hoist stall mechanical automatic brake device and braking method thereof

Abstract

The application provides a monorail crane stall mechanical automatic brake device, which comprises a mounting frame, a first roller set and a second roller set, a brake assembly, an accumulator set and a switch assembly; the mounting frame is upwardly embraced on the lower part of an I-shaped track; the first roller set and the second roller set are respectively arranged at the front end and the rear end of the mounting frame; the brake assembly is arranged on the mounting frame and close to the I-shaped track; the accumulator set is arranged on the mounting frame, and the accumulator set is connected with the brake assembly through a pipeline; the switch assembly is connected on the pipeline between the accumulator set and the brake assembly, the switch assembly is in contact with the I-shaped track, and the switch assembly is switched through the relative speed between the mounting frame and the I-shaped track. The application further provides a monorail crane stall mechanical automatic brake method, which is implemented by using the monorail crane stall mechanical automatic brake device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mine machinery, and particularly relates to a single-track hoist stall mechanical automatic braking device and a braking method thereof. BACKGROUND

[0002] In recent years, single-track hoists are used for underground mine transportation, and the transportation lines are mainly inclined lanes and flat lanes. In the transportation process in the inclined lane, the single-track hoist itself brake or improper operation may cause vehicle stall and running, thus causing accidents. At present, the braking of the single-track hoist relies on its own braking system without a stall automatic protection device. The parking and emergency braking of the single-track hoist are completed by relying on its own braking system. The self-braking system needs to be considered for operation to complete the braking and parking functions, which are the self-often-used functions and are prone to damage and improper operation, thus causing the stall and running of the single-track hoist and accidents. SUMMARY

[0003] Therefore, a self-generated device that can be separated from the single-track hoist system is needed as a stall braking device of the single-track hoist to ensure that the device automatically works without human intervention to stop the stalled single-track hoist in time after the single-track hoist stalls and runs. The purpose of the present application is to provide a single-track hoist stall mechanical automatic braking device and a braking method thereof, which are used to overcome the above problems or at least partially solve or alleviate the above problems.

[0004] The present application provides a single-track hoist stall mechanical automatic braking device, which comprises:

[0005] A mounting frame is upwardly clamped below an I-shaped track, and the two sides of the mounting frame respectively extend to the two sides of the I-shaped track;

[0006] Two sets of first roller groups and two sets of second roller groups are respectively arranged at the front and rear ends of the two sides of the mounting frame;

[0007] Two sets of brake assemblies are respectively arranged on the two sides of the mounting frame and close to the I-shaped track;

[0008] An energy accumulator group is arranged on the mounting frame, and the energy accumulator group is connected with each set of brake assembly through a pipeline;

[0009] Two sets of switch assemblies are connected on the pipeline between the energy accumulator group and the brake assembly, the switch assemblies are in contact with the I-shaped track, and the switch assemblies are switched through the relative speed between the mounting frame and the I-shaped track.

[0010] The present application also has the following optional features.

[0011] Optionally, the brake assembly comprises:

[0012] a brake plate movably arranged on the mounting frame;

[0013] an execution cylinder, one end of which is fixed on the mounting frame and the other end of which is connected with the brake plate, the execution cylinder being elongated to push the brake plate to contact the I-beam track.

[0014] Optionally, the brake plate is hingedly arranged on the mounting frame through a rotating shaft, the back side of the end of the brake plate being vertically provided with a push-pull seat, and the extending end of the execution cylinder being hingedly connected with the push-pull seat.

[0015] Optionally, the switch assembly comprises:

[0016] a follower wheel rotatably arranged on the mounting frame through a fixed shaft, the wheel surface of the follower wheel being in contact with the side surface of the I-beam track;

[0017] a pair of centrifugal pieces, the two centrifugal pieces being symmetrically arranged in the follower wheel, and a compression spring being connected between each centrifugal piece and the inner side of the follower wheel;

[0018] two valve-opening buckles, each of the two valve-opening buckles being in U-shaped structure, the two ends of each valve-opening buckle being fixedly connected with the two ends of one centrifugal piece, and the middle curved portions of the two valve-opening buckles being overlapped with each other;

[0019] a switching valve, the switching valve being fixed on the mounting frame, two switching ports of the switching valve being connected with the pipeline, one end of the switching valve being provided with a valve switch shaft, and the valve switch shaft extending into the two valve-opening buckles.

[0020] Optionally, the energy accumulator group comprises a high-pressure gas tank and a pressure regulating valve.

[0021] The application further provides a single-rail hoist stall mechanical automatic braking method, which is implemented by using the single-rail hoist stall mechanical automatic braking device.

[0022] S001: while the mounting frame of the single-rail hoist moves along the I-beam track through the first and second roller groups, the follower wheel also rolls along the side surface of the I-beam track;

[0023] S002: when the speed of the mounting frame relative to the I-beam track is too fast, the rotating speed of the follower wheel is increased, at this time, the centrifugal force of the two centrifugal pieces is increased, the compression spring is contracted, and the two valve-opening buckles are driven to move in the centrifugal direction;

[0024] S003: the two valve-opening buckles continue to move in the centrifugal direction until the two valve-opening buckles embrace the valve switch shaft at one end of the switching valve and drive the valve switch shaft to rotate, and the switching valve is opened.

[0025] S004: The switching valve is opened, the communication between the high-pressure tank and the execution cylinder is conducted, the execution cylinder is elongated, the brake plate is pressed on the I-beam track, and the monorail crane is braked.

[0026] The beneficial effects of the present application are:

[0027] The monorail crane stall mechanical automatic braking device and braking method of the present application sets a switch assembly on the mounting frame, converts the speed kinetic energy of the mounting frame into the energy for opening the switch assembly, releases the capacity in the accumulator group through the switch assembly, thereby driving the brake assembly to brake the mounting frame, so as to realize the non-intervention type emergency braking of the monorail crane. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure diagram of the monorail crane stall mechanical automatic braking device of the present application;

[0029] Figure 2 is one view of the internal structure of the switch assembly in Figure 1 ;

[0030] Figure 3 is another view of the internal structure of the switch assembly in Figure 1 ;

[0031] Figure 4 is the structure diagram of the brake assembly in Figure 1 ;

[0032] In the above figures: 1 track; 2 mounting frame; 3 brake assembly; 3-1 brake plate; 3-2 rotating shaft; 3-3 execution cylinder; 4 switch assembly; 4-1 follower wheel; 4-2 centrifugal piece; 4-3 compression spring; 4-4 switching valve; 4-5 valve opening inner tooth; 4-6 valve switch shaft; 4-7 fixed shaft; 5 pipeline; 6 accumulator group; 7 first roller group; 8 second roller group.

[0033] The present application will be further described in detail below in combination with the drawings and examples. DETAILED DESCRIPTION

[0034] Example 1

[0035] Reference is made to Figure 1 , Figure 2 , Figure 3 and Figure 4The embodiment of the present application provides a single-track crane stall mechanical automatic brake device, which comprises a mounting frame 2, two sets of first roller groups 7 and two sets of second roller groups 8, two sets of brake assemblies 3, an accumulator group 6 and two sets of switch assemblies 4. The mounting frame 2 is arranged below the I-shaped track 1, and the two sides of the mounting frame 2 extend to the two sides of the I-shaped track. The two sets of first roller groups 7 and the two sets of second roller groups 8 are arranged at the front and rear ends of the two sides of the mounting frame 2. The brake assemblies 3 are arranged on the two sides of the mounting frame 2 and close to the I-shaped track 1. The accumulator group 6 is arranged on the mounting frame 2, and the accumulator group 6 is connected with each set of brake assemblies 3 through a pipeline 5. The two sets of switch assemblies 4 are connected on the pipeline 5 between the accumulator group 6 and the brake assemblies 3, the switch assemblies 4 are in contact with the I-shaped track 1, and the switch assemblies 4 are switched through the relative speed between the mounting frame 2 and the I-shaped track 1.

[0036] The single-track crane stall mechanical automatic brake device of the present application is installed on the I-shaped track 1 through the mounting frame 2, is symmetrical on the left and right sides of the I-shaped track 1, the first roller groups 7 and the second roller groups 8 are installed on the mounting frame 2, the whole device is hoisted on the I-shaped track 1 and slides along the I-shaped track 1, the brake assemblies 3 are installed on the mounting frame 2 and are used for brake work, the switch assemblies 4 are installed on the mounting frame 2 and are used for friction rolling with the I-shaped track 1 to sense the running speed, so that the internal structure is opened by the rotating speed in the overspeed state, the accumulator group 6 is installed on the mounting frame 2 and provides power for the brake assemblies 3, the accumulator group 6 is connected with the executing cylinder 3-3 through the switching valve 4-4 by the pipeline 5, the work of the switch valve group 4 is that when the device running speed is in the overspeed state, the follower wheel 4-1 drives the centrifugal piece 4-2 to be in the overspeed operation, the centrifugal piece 4-2 is compressed by the centrifugal force and away from the center of the compression spring 4-3, at this time, the valve opening buckle 4-5 connected with the centrifugal piece 4-2 is folded to the center and is combined with the valve switch shaft 4-6, the valve switch shaft 4-6 is rotated, the switching valve 4-4 is opened, at this time, the accumulator group 6 is communicated with the executing cylinder 3-3, the cylinder rod generates a thrust force under pressure, the brake plate 3-1 is pressed on the I-shaped track 1, so that the device brake stops the single-track crane.

[0037] Embodiment 2

[0038] Reference Figure 4 On the basis of the embodiment 1, the brake assembly 3 comprises a brake plate 3-1 and an executing cylinder 3-1. The brake plate 3-1 is movably arranged on the mounting frame 2. One end of the executing cylinder 3-3 is fixed on the mounting frame 2, and the other end is connected with the brake plate 3-1. When the executing cylinder 3-3 is elongated, the brake plate 3-1 is pushed to be in contact with the I-shaped track 1.

[0039] The brake plate 3-1 is close to the surface of the I-shaped rail 1 in normal state without contact, and the accumulator group 6 is connected with the execution cylinder 3-3 through the pipeline 5 after the switch assembly 4 is switched, the execution cylinder 3-3 is elongated to push the brake plate 3-1 to contact the I-shaped rail 1, and the friction force between the brake plate 3-1 and the I-shaped rail 1 realizes the braking of the monorail crane.

[0040] Embodiment 3

[0041] Reference Figure 4 On the basis of embodiment 2, the brake plate 3-1 is hinged on the mounting frame 2 through the rotating shaft 3-2, the back side of the end of the brake plate 3-1 is vertically provided with a push-pull seat, and the extension end of the execution cylinder 3-3 is hingedly connected with the push-pull seat.

[0042] The surface of the brake plate 3-1 is provided with a plurality of transverse groove structures for improving the friction force, when the execution cylinder 3-3 is elongated, the push-pull seat is pushed to swing the brake plate 3-1 around the rotating shaft 3-2, so that the surface of the brake plate 3-1 contacts the surface of the I-shaped rail 1, and the braking between the mounting frame 2 of the monorail crane and the I-shaped rail 1 is realized through the friction force.

[0043] Embodiment 4

[0044] Reference Figure 2 And Figure 3 On the basis of embodiment 1, the switch assembly 4 comprises: a follower wheel 4-1, a pair of centrifugal pieces 4-2 and two open valve buckles 4-5 and a switching valve 4-4; the follower wheel 4-1 is rotatably assembled on the mounting frame 2 through a fixed shaft 4-7, the wheel surface of the follower wheel 4-1 contacts the side surface of the I-shaped rail 1; the two centrifugal pieces 4-2 are symmetrically arranged in the follower wheel 4-1; each centrifugal piece 4-2 is connected with the inner side of the follower wheel 4-1 through a compression spring 4-3; the two open valve buckles 4-5 are both in U-shaped structure, the two ends of each open valve buckle 4-5 are fixedly connected with the two ends of one centrifugal piece 4-2 respectively, and the upper and lower overlapping parts of the two open valve buckles 4-5 are curved; the switching valve 4-4 is fixed on the mounting frame 2, and two switching ports are connected on the pipeline 5, one end of the switching valve 4-4 is provided with a valve switch shaft 4-6, and the valve switch shaft 4-6 extends into the two open valve buckles 4-5.

[0045] The follow-up wheel 4-1 is in ring structure, one side of which is provided with a mounting plate, the mounting plate is rotationally assembled on a fixed shaft 4-7 on the mounting frame 2, the centrifugal vane 4-2 is in arc structure, the back side of which is connected with the inner side of the follow-up wheel 4-1 through the compression spring 4-3, so that the centrifugal vane 4-2 can slide on the mounting plate; when the monorail trolley moves, the follow-up wheel 4-1 also rolls along the I-shaped rail 1; when the monorail trolley moves too fast, the centrifugal force of the two centrifugal vanes 4-2 in the follow-up wheel 4-1 increases, the centrifugal vane 4-2 moves to the inner side of the follow-up wheel 4-1 while rotating with the follow-up wheel 4-1, the compression spring 4-3 is compressed, the valve opening buckle 4-5 connected at both ends of the centrifugal vane 4-2 buckles the middle part of the valve opening shaft 4-6 of the switching valve 4-4, when the valve opening buckle 4-5 buckles the valve opening shaft 4-6 of the switching valve 4-4, since the valve opening buckle 4-5 is in rotation, the valve opening shaft 4-6 of the switching valve 4-4 is also rotated, so that the switching valve 4-4 is opened.

[0046] Example 5

[0047] Reference Figure 1 On the basis of example 1, the energy accumulator group 6 comprises a high-pressure gas tank and a pressure regulating valve.

[0048] The energy accumulator group 6 adopts a high-pressure gas tank, high-pressure gas in the high-pressure gas tank is regulated by the pressure regulating valve, and then is introduced into the brake assembly 3 through the pipeline 5 to drive the brake assembly 3 to brake.

[0049] Example 6

[0050] The embodiment of the application proposes a monorail trolley speed loss mechanical automatic braking method, which is implemented by using the monorail trolley speed loss mechanical automatic braking device in any one of the above embodiments, and comprises the following steps: S001: while the mounting frame 2 of the monorail trolley moves along the I-shaped rail 1 through the first roller group 7 and the second roller group 8 on the mounting frame 2, the follow-up wheel 4-1 also rolls along the side surface of the I-shaped rail 1; S002: when the speed of the mounting frame 2 relative to the I-shaped rail 1 is too fast, the rotating speed of the follow-up wheel 4-1 increases, at this time, the centrifugal force of the two centrifugal vanes 4-2 increases, the compression spring 4-3 is contracted, and the two valve opening buckles 4-5 are driven to move in the centrifugal direction; S003: the two valve opening buckles 4-5 continue to move in the centrifugal direction, until the two valve opening buckles 4-5 embrace the valve opening shaft 4-6 at one end of the switching valve 4-4 and drive the valve opening shaft 4-6 to rotate, and the switching valve 4-4 is opened; S004: the switching valve 4-4 is opened, the communication between the high-pressure gas tank and the actuator 3-3 is conducted, the actuator 3-3 is elongated, the brake plate 3-1 is pressed on the I-shaped rail 1, and the monorail trolley is braked.

[0051] In S001, one end of the follower wheel 4-1 is provided with a mounting plate, the mounting plate is rotationally assembled on the fixed shaft 4-7 of the mounting frame 2, when the mounting frame 2 moves along the I-shaped track 1, the follower wheel 4-1 also rolls along the side surface of the I-shaped track 1; in S002 and S003, the elasticity of the compression spring 4-3 is designed, when the follower wheel 4-1 reaches a certain rotating speed, the centrifugal force of the centrifugal piece 4-2 compresses the length of the compression spring 4-3 to make the valve opening buckle 4-5 contact with the valve switch shaft 4-6 of the switching valve 4-4, and drive it to rotate, so as to open the switching valve 4-4; in S004, when the brake plate 3-1 starts to brake, the speed of the mounting frame 2 relative to the I-shaped track 1 decreases, the centrifugal force of the centrifugal piece 4-2 decreases, the compression spring 4-3 is elongated, the valve opening buckle 4-5 is separated from the valve switch shaft 4-6, the switching valve 4-4 switches state, the executing cylinder 3-3 is retracted, the brake plate 3-1 is separated from the I-shaped track 1, and the brake is released.

[0052] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. The components and structures not described in detail in the embodiment are the known components and common structures or common means in the industry, which are not described one by one here.

Claims

1. A mechanical automatic braking device for stalling monorail cranes, characterized in that, include: Mounting bracket (2) is arranged below the I-beam track (1), with both sides of the mounting bracket (2) extending toward both sides of the I-beam track (1); Two sets of first roller groups (7) and two sets of second roller groups (8) are respectively arranged at the front and rear ends of the two sides of the mounting frame (2) and roll in cooperation with the two sides of the I-beam track (1). Two sets of brake assemblies (3) are respectively arranged on both sides of the mounting bracket (2) and close to the I-beam track (1); An accumulator group (6) is mounted on the mounting bracket (2) and is connected to each of the brake assemblies (3) via a pipe (5). Two sets of switch assemblies (4) are connected to the pipeline (5) between the accumulator group (6) and the brake assembly (3). Each set of switch assemblies (4) is in contact with the I-beam track (1) and is switched by the relative speed between the mounting bracket (2) and the I-beam track (1). The switching assembly (4) includes: Follower wheel (4-1), the follower wheel (4-1) is rotatably mounted on the mounting frame (2) via a fixed shaft (4-7), and the wheel surface of the follower wheel (4-1) is in contact with the side of the I-beam track (1); A pair of centrifugal discs (4-2) are symmetrically arranged inside the follower wheel (4-1); a compression spring (4-3) is connected between each centrifugal disc (4-2) and the inner side of the follower wheel (4-1); Two valve opening buckles (4-5) are provided, both of which are U-shaped. The two ends of each valve opening buckle (4-5) are fixedly connected to the two ends of a centrifugal disc (4-2). The middle bends of the two valve opening buckles (4-5) overlap vertically. A switching valve (4-4) is fixed on the mounting bracket (2) and two switching ports are connected to the pipeline (5). One end of the switching valve (4-4) is provided with a valve switch shaft (4-6), which extends between the two valve opening latches (4-5). The follower wheel (4-1) has a ring-shaped structure with a mounting plate on one side. The mounting plate is rotatably mounted on a fixed shaft (4-7) on the mounting frame (2). The centrifugal disc (4-2) has an arc-shaped structure, and its back side is connected to the inner side of the follower wheel (4-1) by a compression spring (4-3), allowing the centrifugal disc (4-2) to slide back and forth on the mounting plate. When the monorail crane moves, the follower wheel (4-1) also rolls along the I-beam track (1). When the monorail crane moves too fast, the centrifugal force of the two centrifugal discs (4-2) inside the follower wheel (4-1) increases. As the centrifugal disc (4-2) rotates with the follower wheel (4-1), it moves inward toward the follower wheel (4-1), compressing the spring (4-3). The middle part of the valve opening buckle (4-5) connected to both ends of the centrifugal disc (4-2) snaps onto the valve switch shaft (4-6) of the switching valve (4-4). When the valve opening buckle (4-5) snaps onto the valve switch shaft (4-6) of the switching valve (4-4), since the valve opening buckle (4-5) is rotating, it will also drive the valve switch shaft (4-6) of the switching valve (4-4) to rotate, thereby opening the switching valve (4-4).

2. The automatic mechanical braking device for stalling monorail cranes according to claim 1, characterized in that, The brake assembly (3) includes: Brake plate (3-1), wherein the brake plate (3-1) is movably mounted on the mounting bracket (2); An actuator (3-3) is provided, with one end fixed to the mounting bracket (2) and the other end connected to the brake plate (3-1). When the actuator (3-3) extends, it pushes the brake plate (3-1) to contact the I-beam track (1).

3. The automatic mechanical braking device for monorail stall as described in claim 2, characterized in that, The brake plate (3-1) is hinged to the mounting bracket (2) via a rotating shaft (3-2). A push-pull seat is vertically arranged on the back side of the end of the brake plate (3-1), and the extended end of the actuator (3-3) is hinged to the push-pull seat.

4. The automatic mechanical braking device for monorail stall as described in claim 1, characterized in that, The accumulator group (6) includes a high-pressure gas tank and a pressure regulating valve.

5. A method for automatic mechanical braking of a monorail crane in case of stall, implemented using the automatic mechanical braking device for a monorail crane in case of stall as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S001: The mounting frame (2) of the monorail moves along the I-beam track (1) via the first roller group (7) and the second roller group (8), while the follower wheel (4-1) also rolls along the side of the I-beam track (1); S002: When the speed of the mounting frame (2) relative to the I-beam track (1) is too fast, the speed of the follower wheel (4-1) increases. At this time, the centrifugal force of the two centrifugal blades (4-2) increases, the compression spring (4-3) contracts, and drives the two valve opening buckles (4-5) to move in the centrifugal direction. S003: The two valve opening latches (4-5) continue to move in the centrifugal direction until the two valve opening latches (4-5) hug the valve switch shaft (4-6) at one end of the switching valve (4-4) and drive the valve switch shaft (4-6) to rotate, and the switching valve (4-4) opens; S004: The switching valve (4-4) is opened, connecting the high-pressure gas tank with the actuator (3-3). The actuator (3-3) extends and presses the brake plate (3-1) onto the I-beam rail (1) to brake the monorail. In S001: One end of the follower wheel (4-1) is provided with a mounting plate, which is rotatably mounted on the fixed shaft (4-7) on the mounting frame (2). When the mounting frame (2) moves along the I-beam track (1), the follower wheel (4-1) also rolls along the side of the I-beam track (1). In S002 and S003, the elasticity of the compression spring (4-3) is designed so that when the follower wheel (4-1) reaches a certain speed, the centrifugal force of the centrifugal disc (4-2) compresses the length of the compression spring (4-3), causing the valve opening latch (4-5) to engage with the switching valve (4-7). -4) The valve switch shaft (4-6) is in contact and rotates, thereby opening the switching valve (4-4); In S004, when the brake plate (3-1) starts to brake, the speed of the mounting bracket (2) relative to the I-beam track (1) decreases, the centrifugal force of the centrifugal plate (4-2) decreases, the compression spring (4-3) extends, the valve opening buckle (4-5) disengages from the valve switch shaft (4-6), the switching valve (4-4) switches states, causing the actuator cylinder (3-3) to retract, causing the brake plate (3-1) to disengage from the I-beam track (1), and releasing the brake.

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