Groove crossing prevention device for four-drum steel wire rope traction type ship unloader and working method of groove crossing prevention device

Abstract

The invention relates to an anti-crossing groove device for a four-drum steel wire rope pull-type ship unloader and a working method thereof.The anti-crossing groove device comprises an arc-shaped anti-crossing groove formed in the side direction of a pulley, a space for a steel wire rope to penetrate through is formed between the arc-shaped anti-crossing groove and the pulley, and the arc-shaped anti-crossing groove comprises two arc-shaped pipes which are parallel and opposite to each other; a plurality of connecting pipes are arranged between the two arc-shaped pipes, and the two ends of the two arc-shaped pipes are fixedly installed on a ship unloader platform respectively. Compared with the prior art, the arc-shaped anti-crossing groove is used for limiting longitudinal displacement of the steel wire rope in the moving process, the steel wire rope is effectively prevented from escaping from the pulleys, the device has the advantage of being low in construction cost, and meanwhile the running state of the steel wire rope corresponding to each pulley can be visually known.

Description

Technical Field

[0001] The present invention relates to the technical field of power plant equipment, in particular to an anti-overrunning device for a four-drum wire rope traction type ship unloader and a working method thereof. Background Art

[0002] The ship unloader is an important coal unloading equipment in the power plant. The ship unloader can run on rails, and the clearance height under the gantry is high enough for transport vehicles to pass through. The grab bucket grabs the loose coal from the ship and unloads it into the conical hopper, which is then sent to the belt conveyor on the dock through the hopper outlet.

[0003] At present, most common ship unloaders adopt a four-drum wire rope traction structure, with the four-drum mechanism as the central component, such as Figure 1 As shown, the trolley's movement and the grab's lifting, lowering, and opening / closing are primarily achieved through the rotation of four drums in different directions. When only the lift motor is activated, its reducer drives the two drums to rotate in the same direction, raising and lowering the grab. When only the opening / closing motor is activated, its reducer drives the two drums to rotate in the same direction, opening and closing the grab. When only the operating motor is activated, the two reducers drive the four drums simultaneously, forming two pairs of drums that rotate toward or away from each other, achieving forward and backward movement of the trolley. When the lift and opening / closing motors and the trolley's traction motor operate in conjunction, the grab can move in a curved pattern.

[0004] However, in actual use, the four-drum wire rope often escapes from the pulley block, which leads to wire rope wear and damage to the pulley block, which is not conducive to the stable and reliable operation of the ship unloader.

[0005] In existing related research, in response to the problem of wire rope escaping from the pulley, Chinese patent CN202107426U proposes a solution to prevent the wire rope from escaping the groove. The design sets the pulley inside the pulley cover, and the pulley groove of the pulley is correspondingly provided with a wire rope. Then, a stopper is designed to be arranged inside the pulley cover corresponding to the pulley, that is, a stopper with an arc-shaped upper end is set in the space formed by the pulley and the bottom plate of the pulley cover to reduce the movable space of the wire rope. When the wire rope is in an abnormal state, it can only slide to the notch of the pulley groove due to the blocking effect of the stopper, and cannot completely slide out of the pulley groove. However, this solution is not well adapted to large equipment such as ship unloaders. On the one hand, the construction cost is relatively high, and on the other hand, the four pulleys of the ship unloader cannot be reliably installed inside the pulley cover, and the running status of the wire rope cannot be intuitively known. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an anti-overrunning device for a four-drum wire rope traction ship unloader and its working method, which can effectively prevent the wire rope from escaping from the pulley block at low cost and can intuitively know the operating status of the wire rope.

[0007] The objectives of the present invention can be achieved through the following technical solutions: an anti-overrun groove device for a four-drum wire rope traction ship unloader, comprising an arc-shaped anti-overrun groove arranged on the side of the pulley, a space for passing the wire rope is provided between the arc-shaped anti-overrun groove and the pulley, the arc-shaped anti-overrun groove comprises two parallel and opposite arc-shaped tubes, a plurality of connecting tubes are provided between the two arc-shaped tubes, and the two ends of the two arc-shaped tubes are respectively fixedly mounted on the ship unloader platform.

[0008] Furthermore, the vertical gap between the arc tube and the edge of the pulley is smaller than the diameter of the wire rope.

[0009] Furthermore, two adjacent arc-shaped anti-overrun grooves arranged on the sides of the two parallel pulleys are connected to each other through a reinforcement pipe.

[0010] Furthermore, both ends of the reinforcement pipe are respectively connected to the arc-shaped pipes of the two arc-shaped anti-overflow grooves.

[0011] Furthermore, a plurality of reinforcement pipes are connected between adjacent arc-shaped anti-overflow grooves.

[0012] Furthermore, the spacing between adjacent reinforcement pipes is greater than or equal to the spacing between adjacent connecting pipes.

[0013] Furthermore, a pull rope is connected between the adjacent arc-shaped anti-overrun grooves, and a limit switch is installed at one end of the pull rope.

[0014] Furthermore, both ends of the pull rope are respectively connected to two adjacent reinforcement tubes.

[0015] A method for operating an anti-overrunning groove device for a four-drum wire rope traction ship unloader includes the following process: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove; the arc-shaped anti-overrunning groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope and prevent the wire rope from escaping from the pulley groove during movement.

[0016] A method for operating an anti-overrun groove device for a four-drum wire rope traction ship unloader includes the following process: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove; the arc-shaped anti-overrun groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope; if the wire rope touches or strikes the pull rope during movement, the limit switch is activated, the machine is stopped, and the wire rope status is checked.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention has an arc-shaped anti-overrun groove on the side of the pulley, wherein a space for passing the wire rope is provided between the arc-shaped anti-overrun groove and the pulley. The arc-shaped anti-overrun groove includes two parallel and opposite arc-shaped tubes, and a plurality of connecting tubes are provided between the two arc-shaped tubes. The arc-shaped anti-overrun groove is thereby utilized to limit the longitudinal displacement of the wire rope during movement, effectively preventing the wire rope from escaping from the pulley, and has the advantage of low construction cost. At the same time, the operating status of the wire rope corresponding to each pulley can be intuitively known.

[0019] The vertical gap between the arc tube and the edge of the pulley is designed to be smaller than the diameter of the wire rope, which can further prevent the wire rope from escaping from the side of the pulley.

[0020] The present invention connects two adjacent arc-shaped anti-overrun grooves arranged on the sides of two parallel pulleys through a reinforcement pipe, so that the two adjacent arc-shaped anti-overrun grooves form a whole, which can alleviate the impact of the arc-shaped anti-overrun grooves when the wire rope moves and ensure the stability of the arc-shaped anti-overrun grooves.

[0021] The present invention connects a pull rope between adjacent arc-shaped anti-overrun grooves, and installs a limit switch at one end of the pull rope. When the wire rope overruns the groove, the wire rope hits the pull rope, the limit switch is activated, and the equipment is shut down. The wire rope overrun fault can be discovered as early as possible and handled in time, avoiding the expansion of equipment failure caused by the wire rope overrun fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a four-drum wire rope traction structure;

[0023] Figure 2 It is a side view of the arc-shaped anti-overrun groove;

[0024] Figure 3 Schematic diagram of the top view of the arc-shaped anti-overrun groove;

[0025] Figure 4 The diagram is a schematic diagram of the reinforcement connection of two adjacent arc-shaped anti-overrun grooves;

[0026] Figure 5 It is a top view schematic diagram of the reinforced connection of two adjacent arc-shaped anti-overflow grooves;

[0027] Figure 6 Schematic diagram of the rope connection between two adjacent arc-shaped anti-overrun grooves;

[0028] Figure 7 A top view schematic diagram of the pull rope connection between two adjacent arc-shaped anti-overrun grooves;

[0029] Description of the markings in the figure: 1. pulley, 2. arc tube, 3. connecting tube, 4. reinforcement tube, 5. pull rope. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 2 and Figure 3 As shown, an anti-overrun groove device for a four-drum wire rope traction ship unloader includes an arc-shaped anti-overrun groove arranged on the side of the pulley, and a space for passing the wire rope is provided between the arc-shaped anti-overrun groove and the pulley. The arc-shaped anti-overrun groove includes two parallel and opposite arc-shaped tubes 2, and a plurality of connecting tubes 3 are provided between the two arc-shaped tubes 2. One end of the wire rope is passed between the two connecting tubes 3 close to the ship unloader platform along the pulley groove. In this embodiment, the plurality of connecting tubes 3 are distributed at equal intervals, and the two ends of the two arc-shaped tubes 2 are respectively fixedly mounted on the ship unloader platform. Specifically, a foot support reinforcement method can be adopted. In this embodiment, an L-shaped foot is involved, thereby utilizing the arc-shaped anti-overrun groove to limit the longitudinal displacement of the wire rope during movement and prevent the wire rope from escaping from the pulley groove during movement.

[0033] The vertical gap between the arc tube 2 and the edge of the pulley is smaller than the diameter of the wire rope, so as to further prevent the wire rope from escaping from the side.

[0034] In this embodiment, the working process of the anti-overrun groove device mainly includes: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove, and the arc-shaped anti-overrun groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope and prevent the wire rope from escaping from the pulley groove during movement.

[0035] The above solution does not require any installation or modification of existing equipment, nor does it incur high costs. At the same time, it enables users to intuitively see the operating status of each pulley relative to the wire rope.

[0036] Example 2

[0037] In this embodiment, based on the first embodiment, two adjacent arc-shaped anti-overrun grooves arranged on the sides of two parallel pulleys are connected to each other through a reinforcement pipe 4, such as Figure 4 and Figure 5 As shown, the two ends of the reinforcement tube 4 are respectively connected to the arc tubes of the two arc-shaped anti-overflow grooves. Multiple reinforcement tubes 4 are connected between adjacent arc-shaped anti-overflow grooves, and the spacing between adjacent reinforcement tubes 4 is greater than or equal to the spacing between adjacent connecting tubes 3. The use of reinforcement tubes 4 to connect two parallel and adjacent arc-shaped anti-overflow grooves into a whole can alleviate the impact of the wire rope on a single arc-shaped anti-overflow groove.

[0038] In practical applications, the reinforcement pipe 4 can be fixed by welding using round steel, flat iron, etc.

[0039] Example 3

[0040] In order to achieve the purpose of timely detection and response, this embodiment is designed to connect a pull rope 5 between adjacent arc-shaped anti-crossing grooves on the basis of the second embodiment. Figure 6 and Figure 7 As shown, the two ends of the pull rope 5 are respectively connected to the two adjacent reinforcement tubes 4, and a limit switch is installed at one end of the pull rope 5. Once the wire rope touches and hits the pull rope 5, the limit switch is activated and the equipment stops.

[0041] In this embodiment, the working process of the anti-overrun groove device mainly includes: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove, and the arc-shaped anti-overrun groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope. If the wire rope touches and hits the pull rope 5 during movement, the limit switch will be activated and the machine will be stopped to check the status of the wire rope.

[0042] In actual applications, the limit switch can also be connected to the background monitoring system. Once the limit switch is activated, the relevant signal will be transmitted to the background monitoring system in real time to ensure that the user is informed in time of possible escape failure of the current wire rope. In addition, an alarm prompt function can also be designed, such as installing an audible and visual alarm on site that is linked to the limit switch action signal, so that on-site personnel can conduct timely inspection and processing.

[0043] In summary, this solution is designed to install an arc-shaped anti-overrun groove device on the side of the pulley. The installation height of the arc-shaped anti-overrun groove can ensure that the wire rope moves normally along the pulley groove, and at the same time prevent the wire rope from escaping from the pulley groove. When the equipment is in overall operation, the wire rope will not have a large longitudinal displacement in the process of going from a relaxed state to a tightened state, reducing the possibility of the wire rope popping out of the anti-overrun groove device.

[0044] In order to reduce the problem of increased impact force of the wire rope on the anti-overpass groove device caused by reducing the height of the anti-overpass groove device, this scheme is designed to reinforce the anti-overpass groove devices on both sides of the pulley group, and connect the two adjacent sets of anti-overpass groove devices to form a whole, thereby achieving the purpose of reinforcement, and then preventing the anti-overpass groove device from being damaged by excessive impact force of the wire rope.

[0045] In addition, this solution adds an electrical limit switch (including a pull rope and limit switch) at the reinforcement position of the pulley anti-overgroove device between two adjacent sets of pulleys. The pull rope is connected between two adjacent arc-shaped tubes, and its ends are respectively connected to different reinforcement tubes. The limit switch is installed at either end of the pull rope. When the wire rope overgrooves, the wire rope hits the pull rope, the limit switch is activated, and the equipment stops. This allows the wire rope overgroove fault to be discovered and handled promptly, avoiding the expansion of equipment failure caused by the wire rope overgroove fault.

[0046] The aforementioned anti-overrunning device for a four-drum wire rope traction ship unloader significantly reduces the risk of wire rope impacting the anti-overrunning device and escaping the pulley block. It also rapidly detects whether a wire rope has escaped, offering the advantage of rapid response. Most importantly, it avoids the escalation of failures caused by wire rope escape, improves equipment stability, and ensures the continued efficient operation of the ship unloader.

Claims

1. An anti-overrunning device for a four-drum wire rope traction ship unloader, characterized in that: The invention comprises an arc-shaped anti-overrun groove arranged on the side of the pulley, a space for passing a steel wire rope is provided between the arc-shaped anti-overrun groove and the pulley, the arc-shaped anti-overrun groove comprises two parallel and opposite arc-shaped pipes (2), a plurality of connecting pipes (3) are provided between the two arc-shaped pipes (2), and both ends of the two arc-shaped pipes (2) are respectively fixedly mounted on the ship unloader platform.

2. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 1, characterized in that: The vertical gap between the arc-shaped tube (2) and the edge of the pulley is smaller than the diameter of the steel wire rope.

3. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 1, characterized in that: Two adjacent arc-shaped anti-overrun grooves arranged on the sides of two parallel pulleys are connected to each other through a reinforcement pipe (4).

4. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 3, characterized in that: Both ends of the reinforcement pipe (4) are respectively connected to the arc-shaped pipes (2) of the two arc-shaped anti-overflow grooves.

5. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 3, characterized in that: A plurality of reinforcement pipes (4) are connected between the adjacent arc-shaped anti-overflow grooves.

6. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 5, characterized in that: The spacing between adjacent reinforcement pipes (4) is greater than or equal to the spacing between adjacent connecting pipes (3).

7. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 3, characterized in that: A pull rope (5) is connected between the adjacent arc-shaped anti-overrun grooves, and a limit switch is installed at one end of the pull rope (5).

8. The anti-overrunning device for a four-drum wire rope traction ship unloader according to claim 7, characterized in that: Both ends of the pull rope (5) are respectively connected to two adjacent reinforcement tubes (4).

9. A method for operating a trough overrun prevention device for a four-drum wire rope traction ship unloader, applied to the trough overrun prevention device according to any one of claims 1 to 6, characterized in that: The process includes the following: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove. The arc-shaped anti-overrun groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope and prevent the wire rope from escaping from the pulley groove during movement.

10. A method for operating a trough overrun prevention device for a four-drum wire rope traction ship unloader, applied to the trough overrun prevention device according to any one of claims 7 to 8, characterized in that: The process includes the following: the pulley rotates, the wire rope changes from a relaxed state to a tightened state, and moves along the pulley groove, and the arc-shaped anti-overrun groove on the side of the pulley is used to limit the longitudinal displacement of the wire rope. If the wire rope touches and hits the pull rope (5) during the movement, the limit switch is activated and the machine is stopped to check the state of the wire rope.

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