A pulley with a fault protection device

Abstract

The present invention discloses a pulley with a fault protection device, the pulley comprises: a bottom plate, the bottom plate is arranged above the pulley; a traction stopper, two traction stoppers are symmetrically arranged at the top two ends of the bottom plate; a cable support frame, the cable support frame is arranged below the bottom plate; a galvanized pipe, the galvanized pipe is arranged between the bottom plate and the cable support frame; a protection unit, the protection unit is arranged in the middle of the cable support frame, and one end of the protection unit is arranged on the bottom plate. The pulley is stopped immediately when a fault occurs, avoiding breaking or squeezing the cable, providing a good alarm prompt in the early stage of the fault, and thus avoiding the expansion of the fault.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic control equipment on a mine chute, in particular to a pulley with a fault protection device. Background Art

[0002] Mobile unloading vehicles are widely used in ore chutes, transporting various materials to designated silos. They are primarily driven by a three-phase asynchronous motor. Power and control components include a galvanized track, a mobile pulley, power cables, control cables, and a traction wire rope. The galvanized track is fixedly installed next to the conveyor belt. A mobile cable pulley is placed within the track, and a cable support is placed on the pulley, extending outward in a wave-like pattern. When traveling in one direction, the traction wire rope pulls the successive pulleys. When traveling in the other direction, a baffle at the lead vehicle position pushes the upper block of the pulley, creating a propulsion mechanism.

[0003] However, in the process of implementing the technical solutions in the embodiments of the present invention, the applicant of the present invention found that the above-mentioned prior art has at least the following technical problems:

[0004] The mobile cable pulley in the existing technology is stuck due to the increasing bearing force during the pushing process, which causes the cable pulley to be squeezed and damaged. In the traction process, the wire rope head is prone to loosening or breaking, causing the cable to be pulled apart, thereby leading to a fault shutdown, which seriously affects the normal charging of the blast furnace. Summary of the Invention

[0005] The embodiment of the present invention provides a pulley with a fault protection device to solve the technical problem in the prior art that during the pushing process of a mobile cable pulley, the load-bearing force continuously increases, causing the pulley to become stuck, resulting in the cable pulley being squeezed and damaged. During the traction process, the wire rope head is prone to loosening or breaking, causing the cable to be pulled apart, thereby causing a fault shutdown and seriously affecting the normal charging of the blast furnace. The device achieves the technical effect of stopping the pulley as soon as a fault occurs, avoiding breaking or squeezing the cable, providing a good alarm prompt at the early stage of the fault, and thus preventing the fault from escalating.

[0006] In order to solve the above problems, an embodiment of the present invention provides a pulley with a fault protection device, which includes: a base plate, which is arranged above the pulley; a traction stop head, two of which are symmetrically arranged at the top two ends of the base plate; a cable support frame, which is arranged below the base plate; a galvanized pipe, which is arranged between the base plate and the cable support frame; and a protection unit, which is arranged in the middle of the cable support frame, and one end of the protection unit is arranged on the base plate.

[0007] Preferably, the pulley also includes: bearing pulleys, two pairs of the bearing pulleys are symmetrically arranged at the top of the base plate, wherein each pair of the bearing pulleys has two pulleys, which are respectively located on the inner and outer sides of the top of the base plate and can slide freely in the galvanized track.

[0008] Preferably, the pulley further includes: a first through hole, which is arranged on one side of the middle part of the bottom plate; and a second through hole, which is arranged on the other side of the middle part of the bottom plate and is symmetrical to the first through hole.

[0009] Preferably, the pulley further includes: a first steel wire rope, the first steel wire rope passes through the first through hole; a second steel wire rope, the second steel wire rope passes through the second through hole; wherein the traction force is transmitted between the pulleys via the first steel wire rope and the second steel wire rope.

[0010] Preferably, the cable support is a group of arc-shaped surfaces, which can swing left and right, and the cable support is wound around the cable support.

[0011] Preferably, the protection unit further includes: a limiting base; a normally closed contact, wherein the normally closed contact is arranged inside the limiting base; and a limiting long handle, wherein the limiting long handle is located on both sides of the limiting base.

[0012] Preferably, the cable support has a first state and a second state: when the cable support is in the first state, there is a certain distance between the arc-shaped surface of the cable support and the two ends of the limit long handle, and the normally closed contact is closed; when the cable support is in the second state, the arc-shaped surface of the cable support touches the two ends of the limit long handle, and the normally closed contact is disconnected.

[0013] Preferably, the galvanized pipe is a hollow pipe structure.

[0014] Preferably, the galvanized pipe further comprises: an interlocking cable, which is laid inside the galvanized pipe, wherein one end of the interlocking cable is connected to the normally closed contact, and the other end is externally connected to the control circuit of the unloading vehicle.

[0015] Preferably, the two traction stops are circular in shape and are welded to both ends of the top of the base plate.

[0016] The above one or more technical solutions in the embodiments of the present invention have at least one or more of the following technical effects:

[0017] An embodiment of the present invention provides a pulley with a fault protection device, the pulley comprising: a base plate, the base plate being arranged above the pulley; a traction stopper, two of the traction stops being symmetrically arranged at the top ends of the base plate; a cable support frame, the cable support frame being arranged below the base plate; a galvanized pipe, the galvanized pipe being arranged between the base plate and the cable support frame; and a protection unit, the protection unit being arranged in the middle of the cable support frame, with one end of the protection unit being arranged on the base plate. When the pulley is in traction, if the pulley is stuck, the wire rope will be pulled hard. If it still cannot be pulled, the wire rope will break, so that the cable between the pulleys is gradually straightened from the wavy shape. When it is straightened to a certain extent, the cable support frame of the stuck pulley will swing and touch the limit long handle, and the machine will be shut down immediately when the fault occurs to avoid cable breaking. When the traction stop between the pulleys is in contact and pushing, if the pulley is stuck, the rear pulley will continue to push forward, causing the other side of the pulley cable support frame to swing to the limit long handle and shut down, avoiding cable crushing, thereby achieving the technical effect of providing a good alarm prompt in the early stage of the fault and thus avoiding the expansion of the fault. It further solves the technical problem in the prior art that the mobile cable pulley is stuck due to the increasing bearing force during the pushing process, resulting in the cable pulley being crushed, and the wire rope head is prone to loosening or breaking during the traction process, causing the cable to be pulled, resulting in fault shutdown, which seriously affects the normal charging of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 The figure is a schematic structural diagram of a pulley with a fault protection device provided in an embodiment of the present invention.

[0020] Figure numerals: base plate 1, traction stop 2, bearing pulley 3, galvanized track 4, first through hole 5, first steel wire rope 6, second through hole 7, second steel wire rope 8, galvanized pipe 9, interlocking cable 10, cable support frame 11, cable 12, limiting base 13, limiting long handle 14. DETAILED DESCRIPTION

[0021] An embodiment of the present invention provides a pulley with a fault protection device, which is used to solve the technical problem in the prior art that the mobile cable pulley is stuck due to the increasing bearing force during the pushing process, resulting in the cable pulley being squeezed and damaged, and the wire rope head is prone to loosening or breaking during the traction process, causing the cable to be pulled apart, thereby causing a fault shutdown and seriously affecting the normal loading of the blast furnace.

[0022] The technical solution in the embodiment of the present invention has the following overall structure: a base plate, which is arranged above the pulley; a traction stopper, two of which are symmetrically arranged at the top ends of the base plate; a cable support, which is arranged below the base plate; a galvanized pipe, which is arranged between the base plate and the cable support; a protection unit, which is arranged in the middle of the cable support, and one end of the protection unit is arranged on the base plate. When the pulley is in the process of pulling, if the pulley is stuck, the wire rope will be pulled hard. If it still cannot be pulled, the wire rope will break, so that the cable between the pulleys will gradually straighten from the wavy shape. When it is straightened to a certain extent, the cable support frame of the stuck pulley will swing and touch the limit long handle, and the machine will be stopped as soon as the fault occurs to avoid breaking the cable. When the traction stop heads between the pulleys are in the process of contact and pushing, if the pulley is stuck, the pulley at the rear end will continue to push forward, causing the other side of the pulley cable support frame to swing to the limit long handle to cause a shutdown, thus avoiding squeezing the cable, thereby achieving the technical effect of providing a good alarm prompt in the early stage of the fault, thereby avoiding the expansion of the fault.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] Example 1

[0025] The embodiment of the present invention provides a pulley with a fault protection device, please refer to Figure 1 , the pulley comprises:

[0026] A bottom plate 1, the bottom plate 1 being arranged above the pulley;

[0027] Furthermore, the pulley also includes: bearing pulleys 3, two pairs of the bearing pulleys 3 are symmetrically arranged at the top of the base plate 1, wherein each pair of the bearing pulleys 3 has two pulleys, which are respectively located on the inner and outer sides of the top of the base plate 1 and can slide freely in the galvanized track 4.

[0028] Specifically, the bottom plate 1 is arranged above the pulley and is the main supporting structure of the pulley. The shape of the bottom plate 1 is as follows: Figure 1 As shown, two large holes are provided at the top of the base plate 1, and a pair of bearing pulleys 3 are installed in each of the large holes, that is, the bearings of the bearing pulleys 3 pass through the large holes, so that the two pulleys of the bearing pulley 3 are respectively located on the inner and outer sides of the top of the base plate 1, and there is a certain distance between the two pairs of bearing pulleys 3, which are symmetrically arranged at the top of the base plate 1, so that they can move back and forth on the galvanized track 4, further achieving the technical effect of free walking on the galvanized track.

[0029] Traction stoppers 2, two of the traction stoppers 2 are symmetrically arranged at both ends of the top of the base plate 1;

[0030] Furthermore, the two traction stops 2 are circular in shape and are welded to both ends of the top of the base plate 1 .

[0031] Specifically, two circular traction stops 2 are installed and welded at both ends of the top of the base plate 1. The traction stops 2 are mainly used to transmit the driving force between the pulleys during the pushing process, so as to achieve the purpose of pushing the pulley to move.

[0032] A cable support frame 11 is provided below the base plate 1;

[0033] Furthermore, the cable support frame 11 is a set of arc-shaped surfaces that can swing left and right, and the cable 12 is wound around the cable support frame 11.

[0034] Specifically, the cable support 11 is provided below the base plate 1, wherein the cable support 11 is a set of arc-shaped surfaces, which is convenient for placing and supporting the cable 12, and the cable support 11 can swing left and right. In the actual production process, a plurality of pulleys are placed in the galvanized track 4, and then a cable 12 is placed on the cable support 11 of each pulley, so that the cable 12 extends out in a wave shape.

[0035] Furthermore, the pulley also includes: a first through hole 5, which is arranged on one side of the middle of the base plate 1; and a second through hole 7, which is arranged on the other side of the middle of the base plate 1 and is symmetrical to the first through hole 5.

[0036] Furthermore, the pulley also includes: a first steel wire rope 6, which runs through the first through hole 5; a second steel wire rope 8, which runs through the second through hole 7; wherein the traction force is transmitted between the pulleys through the first steel wire rope 6 and the second steel wire rope 8.

[0037] Specifically, a first through hole 5 and a second through hole 7 are provided on either side of the center of the base plate 1, and the first through hole 5 and the second through hole 7 are symmetrically arranged on either side of the center of the base plate 1. A first steel wire rope 6 and a second steel wire rope 8 pass through the first through hole 5 and the second through hole 7, respectively, to transmit traction force between the pulleys during traction. During traction, the traction steel wire ropes pull the series of pulleys as a whole, thereby achieving the purpose of transporting materials.

[0038] The protection unit is arranged in the middle of the cable support frame 11 , and one end of the protection unit is arranged on the base plate 1 .

[0039] Furthermore, the protection unit also includes: a limiting base 13; a normally closed contact [not shown in the figure], which is arranged inside the limiting base 13; and a limiting long handle 14, which is located on both sides of the limiting base 13.

[0040] Furthermore, the cable support 11 has a first state and a second state: when the cable support 11 is in the first state, there is a certain distance between the arc-shaped surface of the cable support 11 and the two ends of the limit long handle 14, and the normally closed contact is closed; when the cable support 11 is in the second state, the arc-shaped surface of the cable support 11 touches the two ends of the limit long handle 14, and the normally closed contact is disconnected.

[0041] Specifically, a protection unit is provided in the middle of the cable support frame 11, and the protection unit is connected to the bottom of the base plate 1 through the galvanized pipe 9, wherein the protection unit is used to shut down the pulley in the first time when a fault occurs, and issue an alarm to avoid breaking or squeezing the cable 12, thereby preventing the fault from further expanding. The protection unit includes a limit base 13, a normally closed contact, and a limit long handle 14, wherein the limit base 13 is vertically provided below the galvanized pipe 9, and the limit base 13 is a hollow structure, and a group of normally closed contacts are provided inside the limit base 13. The interlocking cable 10 laid in the galvanized pipe 9 is connected to the contact point of the normally closed contact, and the limit long handle 14 is located on both sides of the limit base 13 and is connected to the normally closed contact, thereby making the limit long handle 14 connected to the overall control circuit of the unloading vehicle. When the pulley is moving normally, the cable support frame 11 is in the first state, that is, there is a certain distance between the arc surface of the cable support frame 11 and the two ends of the limit long handle 14, and the normally closed contact is closed; when the pulley is pulled by the wire rope, if the bearing pulley 3 is stuck, the wire rope will continue to be pulled strongly. When it cannot be pulled, the wire rope breaks, so that the cable 12 between the pulleys is gradually straightened from the wavy shape. When the cable 12 is pulled to a certain extent, the cable support frame 11 of the pulley that is stuck is in the second state, and the arc surface of the cable support frame 11 touches either end of the limit long handle 14. , thereby causing the normally closed contact to disconnect, the control circuit of the pulley during normal travel will be interlocked and disconnected, and the unloading car will stop in time, thereby avoiding damage to the cable 12; when the pulley is pushed by the contact of the traction stop 2, if the bearing pulley 3 is stuck, the pulley behind will continue to move forward. At this time, the cable support frame 11 of the stuck pulley is in the second state, that is, the arc surface of the cable support frame 11 touches either end of the limit long handle 14, thereby causing the normally closed contact to disconnect, the control circuit of the pulley during normal travel will be interlocked and disconnected, and the unloading car will stop in time, thereby avoiding crushing of the cable 12. This further achieves the technical effect of stopping the pulley as soon as a fault occurs, avoiding breaking or crushing the cable 12, providing a good alarm prompt in the early stage of the fault, and thus avoiding the expansion of the fault.

[0042] a galvanized pipe 9, the galvanized pipe 9 being arranged between the base plate 1 and the cable support frame 11;

[0043] Furthermore, the galvanized pipe 9 is a hollow pipe structure.

[0044] Furthermore, the galvanized pipe 9 also includes: an interlocking cable 10, which is laid inside the galvanized pipe 9, wherein one end of the interlocking cable 10 is connected to the normally closed contact, and the other end is externally connected to the control circuit of the unloading vehicle.

[0045] Specifically, the galvanized pipe 9 is a hollow tube structure, which is located between the base plate 1 and the cable support 11. The bottom of the base plate 1 is connected to the inside of the cable support 11 through the galvanized pipe 9, that is, one end of the galvanized pipe 9 is fixed to the bottom of the base plate 1 by welding or bolting, and the other end of the galvanized pipe 9 is fixed to the limit base 13 by welding or bolting. Since the galvanized pipe 9 is a hollow pipe, an interlocking cable 10 can be laid inside the galvanized pipe 9, wherein one end of the interlocking cable 10 is connected to the normally closed contact inside the limit base 13, and the other end of the interlocking cable 10 is externally connected to the control circuit of the unloading truck, further achieving the technical effect of linkage control of the limit long handle.

[0046] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0047] An embodiment of the present invention provides a pulley with a fault protection device, the pulley comprising: a base plate, the base plate being arranged above the pulley; a traction stopper, two of the traction stops being symmetrically arranged at the top ends of the base plate; a cable support frame, the cable support frame being arranged below the base plate; a galvanized pipe, the galvanized pipe being arranged between the base plate and the cable support frame; and a protection unit, the protection unit being arranged in the middle of the cable support frame, with one end of the protection unit being arranged on the base plate. When the pulley is in traction motion, if the pulley is stuck, the wire rope will be pulled hard. If it still cannot be pulled, the wire rope will break, so that the cable between the pulleys is gradually straightened from the wavy shape. When it is straightened to a certain extent, the cable support frame of the stuck pulley will swing and touch the limit long handle, and the machine will be shut down immediately when the fault occurs to avoid breaking the cable. When the traction stop heads between the pulleys are in contact and pushing, if the pulley is stuck, the pulley at the rear end will continue to push forward, causing the other side of the pulley cable support frame to swing to the limit long handle and shut down, avoiding squeezing the cable, thereby achieving the technical effect of providing a good alarm prompt in the early stage of the fault and thus avoiding the expansion of the fault. It further solves the technical problem in the prior art that the mobile cable pulley is stuck due to the increasing bearing force during the pushing process, resulting in the cable pulley being squeezed and damaged, and the wire rope head is prone to loosening or breaking during the traction process, causing the cable to be pulled and shut down, which seriously affects the normal charging of the blast furnace.

[0048] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0049] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such changes and modifications of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A pulley with a fault protection device, characterized in that: The pulley comprises: A bottom plate, the bottom plate being arranged above the pulley; A traction stopper, wherein two traction stoppers are symmetrically arranged at two ends of the top of the bottom plate; A cable support frame, the cable support frame is arranged below the bottom plate; A galvanized pipe, the galvanized pipe is arranged between the bottom plate and the cable support frame; A protection unit, wherein the protection unit is arranged in the middle of the cable support frame, and one end of the protection unit is arranged on the bottom plate; The pulley further comprises: bearing pulleys, two pairs of the bearing pulleys are symmetrically arranged at the top of the bottom plate, wherein each pair of the bearing pulleys has two pulleys, which are respectively located at the inner and outer sides of the top of the bottom plate and can slide freely in the galvanized track; The pulley further includes: a first through hole, which is arranged on one side of the middle of the bottom plate; a second through hole, which is arranged on the other side of the middle of the bottom plate and is symmetrically arranged with the first through hole; The pulley further includes: a first steel wire rope, the first steel wire rope passes through the first through hole; a second steel wire rope, the second steel wire rope passes through the second through hole; wherein the traction force is transmitted between the pulleys through the first steel wire rope and the second steel wire rope; The cable support frame is a set of arc-shaped surfaces, which can swing left and right, and the cable support frame is wound with cables; The protection unit further includes: a limit base; a normally closed contact, the normally closed contact being arranged inside the limit base; a limit long handle, the limit long handle being located at both sides of the limit base; The cable support has a first state and a second state: when the cable support is in the first state, there is a certain distance between the arc surface of the cable support and the two ends of the limit long handle, and the normally closed contact is closed; when the cable support is in the second state, the arc surface of the cable support touches the two ends of the limit long handle, and the normally closed contact is disconnected.

2. The pulley according to claim 1, characterized in that The galvanized pipe is a hollow pipe structure.

3. The pulley according to claim 2, characterized in that: The galvanized pipe also includes: An interlocking cable is laid inside the galvanized pipe, wherein one end of the interlocking cable is connected to the normally closed contact, and the other end is externally connected to the control circuit of the unloading vehicle.

4. The pulley according to claim 1, characterized in that: The two traction stoppers are circular in shape and are welded at both ends of the top of the bottom plate.

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