Multifunctional scraper protection device

Abstract

The utility model discloses a multifunctional scraper protection device which comprises a protection material removing device, a first detection device, a second detection device and a controller. Each protective material removing device comprises a chain pressing block and a discharging box, the tops of the chain pressing blocks are fixed to the connecting plate through connecting rods, the two protective material removing devices are arranged on the two sides of the gate opening in the scraper machine box body respectively, the discharging boxes are communicated with the outer side walls, corresponding to the protective material removing devices, of the scraper machine box body, and the bottoms of the discharging boxes are communicated with a chute below the scraper machine. The first detection device comprises a pair of supports, a roller is arranged between the supports, a plurality of first feeler levers are fixed to the roller at intervals, and the sensing end of the first proximity switch faces the ends of the first feeler levers. The second detection device comprises a riding wheel, the riding wheel is fixed to a wheel shaft, the wheel shaft fixes a second feeler lever, and the sensing end of the second proximity switch faces the end of the second feeler lever. The chain cleaning device has the advantages that materials accumulated on the chain are cleaned and prevented from being carried between the chain and the chain wheel, chain jumping and chain breaking are reduced, and an alarm is given in time.

Description

Technical field:

[0001] The utility model relates to the field of transportation, in particular to a multifunctional scraper protective device. Background technology:

[0002] The scraper is a main type of transport equipment in mechanical transport equipment. The scraper has a strong transport capacity. The casing is a closed type to prevent coal dust from flying and avoid polluting the working environment. It can switch between forward and reverse directions and can feed or unload at any point on the conveying length. The scraper is mainly composed of a driving device and a casing 1, a sprocket 2, a chain 3, a coal scraper rod 4, a tongue plate, a slide 5, a bottom plate 6, a gate mouth 7 and other components. The driving device drives the sprocket 2 to drive the chain 3 and the coal scraper rod 4 to run inside the casing 1, and the sprockets 2 at the head and tail of the machine drive the chain 3 and the coal scraper rod 4 to make a circular motion. The tongue plate, the slide 5 and the bottom plate 6 play the role of transition support.

[0003] The raw coal material enters the scraper box 1 through the upper chute and falls onto the bottom plate 6 at the bottom of the box 1. The chain 3 on the bottom plate 6 is the lower chain 3. During operation, the material is continuously transported toward the head of the machine through the coal scraper rod 4. When the material passes through the unloading gate port 7, the material falls from the gate port 7 into the lower chute 8 and enters the subordinate equipment. The chain 3 and the coal scraper rod 4 run at the head of the machine leaving the bottom plate 6 of the box 1, and are driven by the sprocket 2 to reverse upward and transition the coal scraper rod 4 on the tongue plate, and then fall on the supporting slide 5, and the upper chain 3 continues to make a circular motion backward.

[0004] At present, due to the large number of large gangues in the raw coal transported by the scraper, the materials cannot completely fall from the discharge gate port 7 into the lower chute 8 during forward transportation. Some large pieces of materials will accumulate on the synchronous chains 3 on both sides of the bottom of the box body 1 and continue to be transported forward. When the gangue with higher hardness is rolled into the tooth groove of the sprocket wheel 2 and cannot be squeezed and crushed by the sprocket wheel 2 and the chain 3, the chain ring will not be engaged in the tooth groove of the sprocket wheel 2. When it is reversed upward, it will cause the chain to jump. After the chain 3 jumps, the number of rings of each section of the chain 3 will become asymmetric, causing the coal scraper rod 6 to tilt;

[0005] Afterwards, when the chains 3 on both sides cannot run synchronously and symmetrically, the chains 3 and the sprockets 2 are misaligned when they are engaged, which will aggravate the wear of the chains 3 and the sprockets 2 and shorten their service life. The chain 3 on the chain-jumped side will become seriously loose and droopy. Since there is a gap between the head sprocket 2 and the tongue plate, the chain 3 on the chain-jumped side will form a blockage with the lower part of the front end of the tongue plate in a relaxed state. If it is not discovered in time, the tongue plate will be deformed, welded and fall off, and in severe cases, the chain 3 will be broken.

[0006] Secondly, if the chain 3 is severely slack, the engagement between the chain 3 and the tooth grooves of the sprocket 2 will become loose. In the case of misalignment of the engagement, it is extremely easy for the chain 3 to derail. After one side of the chain 3 breaks, under the connection relationship of the coal scraping rod 6, the bottom chain 3 on the broken chain side will still be carried forward by the unbroken chain 3, while the upper chain 3 has been disconnected and is in a dislocated state. Often, the bottom chain 3 and the coal scraping rod 6 will be wound around the head sprocket 2 and the shaft of the scraper conveyor. By the time the equipment alarms or the personnel discovers it, the equipment has already been damaged. After a failure occurs in the scraper conveyor among transportation equipment, it is the equipment with the most serious damage in the industry. It will seriously affect the production time while wasting financial and material resources. Utility Model Content:

[0007] The purpose of the present utility model is to provide a multifunctional protection device for a scraper conveyor.

[0008] The present utility model is implemented by the following technical solutions:

[0009] A multifunctional protection device for a scraper conveyor, comprising a protection and material removal device, a first detection device, a second detection device, and a controller;

[0010] The protection and material removal device includes a chain pressing block, a connecting rod, a connecting plate, and a discharge box. The top of the chain pressing block is fixed to the connecting plate through the connecting rod. There are two protection and material removal devices, which are respectively arranged on both sides of the gate opening in the scraper conveyor box body. The connecting plate is fixed to the bottom of the scraper conveyor slideway. The bottom of the chain pressing block is close to the top of the chain on the scraper conveyor bottom plate. The end of the chain pressing block opposite to the moving direction of the chain on the scraper conveyor bottom plate is triangular;

[0011] The discharge box is fixed to the outer side wall of the scraper conveyor box body corresponding to the protection and material removal device. One side of the discharge box is communicated with the inside of the scraper conveyor box body. The bottom of the discharge box is open and is communicated with the side wall of the chute below the scraper conveyor through a channel;

[0012] The first detection device includes a pair of brackets, a roller, a first contact rod, and a first proximity switch. The roller is rotatably arranged between one ends of a pair of brackets. A plurality of first contact rods are fixedly arranged at intervals along the circumferential direction on the roller. The first proximity switch is arranged between the other ends of a pair of brackets. The sensing end of the first proximity switch faces the end of the first contact rod;

[0013] There are two first detection devices, which are jointly arranged inside the head of the scraper conveyor. The other ends of a pair of brackets and the first proximity switch are all fixed to the inner side wall of the head of the scraper conveyor. The end of the first contact rod is in movable contact with the coal scraping rod of the scraper conveyor;

[0014] The second detection device comprises a supporting wheel, a wheel axle, a second touch rod, and a second proximity switch, wherein the wheel center of the supporting wheel is fixed to one end of the wheel axle, the second touch rod is vertically fixed to the other end of the wheel axle, and the sensing end of the second proximity switch faces the end of the second touch rod;

[0015] There are two second detection devices, the support wheel is arranged on one side of the sprocket wheel inside the scraper head, the wheel shaft rotates and penetrates the side wall of the scraper case, and the second proximity switch is fixed on the outer side wall of the scraper case;

[0016] The signal output ends of the first proximity switch and the second proximity switch are respectively connected to the signal input end of the controller.

[0017] Preferably, the bottom of the discharge box is arranged obliquely downward toward the opening.

[0018] Preferably, it also includes an audible and visual alarm, and the controller is electrically connected to the audible and visual alarm.

[0019] Advantages of the utility model:

[0020] 1. The protective material removal device can divert the materials accumulated on the chains on both sides of the gate mouth. One part falls into the chute below from the gate mouth, and the other part falls into the discharge box first, and then merges into the chute below. This process reduces the accumulation of large pieces of material and reduces the material being carried away by the chain, which in turn causes hard materials such as gangue to be drawn into the sprocket groove, reducing the probability of chain jumping and chain breaking, and prolonging the service life of the chain and sprocket.

[0021] 2. The two first detection devices detect the reversed coal scraper rods when the chains on both sides move synchronously. When chain jumping occurs or the coal scraper rods break, the coal scraper rods tilt, causing the first proximity switch of one of the first detection devices to fail to be triggered for a long time, or after the coal scraper rods completely break and fall, the first proximity switches of the two first detection devices cannot be triggered for a long time, and the sound and light alarm gives a timely prompt or the controller directly controls the equipment to alarm and shut down.

[0022] 3. Remove the tongue plate and use the supporting wheels of the second detection device to support the reversed chain. The two supporting wheels of the second detection device are driven by the chain to rotate to detect whether the chain moves normally. When the chain on either side is broken, the supporting wheels on the same side cannot rotate, and the sound and light alarm prompts or the controller directly controls the equipment to alarm and shut down. At the same time, after the chain jumps, if the first detection device does not alarm or the personnel do not confirm and deal with it in time after the alarm, the chain on the jumped chain side will relax and sag, and there will be no jamming problem with the supporting wheels as support. When the chain after jumping is misaligned after biting with the sprocket, the chain will not come off the wheel due to the action of the supporting wheel groove. Description of the drawings:

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is Figure 1 a partial enlarged view of A in

[0026] Figure 3 is Figure 1 a partial enlarged view of B in

[0027] Figure 4 is Figure 1 a partial enlarged view of C in

[0028] In the figure: box body 1, sprocket 2, chain 3, coal scraping rod 4, slideway 5, bottom plate 6, gate opening 7, lower chute 8, protective and discharging device 9, chain pressing block 9.1, connecting rod 9.2, connecting plate 9.3, discharging box 9.4, first detection device 10, support 10.1, roller 10.2, first contact rod 10.3, first proximity switch 10.4, second detection device 11, supporting wheel 11.1, wheel shaft 11.2, second contact rod 11.3, second proximity switch 11.4, controller 12, sound and light alarm 13. Specific implementation manners:

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, a multifunctional scraper protection device includes a protective and discharging device 9, a first detection device 10, a second detection device 11, and a controller 12;

[0031] The protective material removal device 9 comprises a chain pressing block 9.1, a connecting rod 9.2, a connecting plate 9.3, and a discharge box 9.4. The top of the chain pressing block 9.1 is fixed to the connecting plate 9.3 through the connecting rod 9.2. There are two protective material removal devices 9, which are respectively arranged on both sides of the gate opening 7 in the scraper housing 1. The connecting plate 9.3 is fixed to the bottom of the scraper slide 5. The bottom of the chain pressing block 9.1 is close to the top of the chain 3 on the scraper bottom plate 6. The end of the chain pressing block 9.1 opposite to the moving direction of the chain 3 on the scraper bottom plate 6 is a triangle.

[0032] When the scraper is running, the chain 3 on the bottom plate 6 drives the coal scraper rod 4 to push the coal to the gate opening 7. When the large pieces of materials accumulate on the chain 3 on both sides of the gate opening 7, they rush to the triangular end of the chain pressing block 9.1 and are diverted. A part of them falls from the gate opening 7 into the chute 8 below.

[0033] The discharge box 9.4 is fixed on the outer wall of the scraper case 1 corresponding to the protective removal device 9. One side of the discharge box 9.4 is connected to the scraper case 1. The bottom of the discharge box 9.4 is open and connected to the side wall of the chute 8 below the scraper through a channel. The bottom of the discharge box 9.4 is set obliquely downward toward the opening. The other part of the diverted material falls into the discharge box 9.4 and falls into the channel from the opening along the inclined bottom, and finally merges into the chute 8 below. This process reduces the accumulation of large pieces of material and reduces the material being carried away by the chain 3, which in turn causes hard materials such as gangue to be drawn into the tooth groove of the sprocket 2, thereby reducing the probability of chain jumping.

[0034] The first detection device 10 comprises a pair of brackets 10.1, a roller 10.2, a first touch rod 10.3, and a first proximity switch 10.4. The roller 10.2 is rotatably arranged between one end of the pair of brackets 10.1, and a plurality of first touch rods 10.3 are fixedly arranged on the roller 10.2 at intervals along the circumferential direction. The first proximity switch 10.4 is arranged between the other ends of the pair of brackets 10.1, and the sensing end of the first proximity switch 10.4 faces the end of the first touch rod 10.3. When any first touch rod 10.3 is moved, the roller 10.2 rotates on the bracket 10.1, and the other first touch rods 10.3 approach instantly to trigger the first proximity switch 10.4.

[0035] There are two first detection devices 10, which are arranged together on the inner side of the scraper head. The other end of a pair of brackets 10.1 and the first proximity switch 10.4 are fixed on the inner side wall of the scraper head. The end of the first touch rod 10.3 movably contacts the scraper coal scraping rod 4 of the scraper. When the scraper is running, the sprocket 2 of the scraper head drives the chain 3 on the bottom plate 6 to reverse upward and rotate to the top of the slideway 5. At the same time, the coal scraping rod 4 is also driven by the chain 3 to reverse upward. Since the coal scraping rods 4 are arranged at intervals, any coal scraping rod 4 will toggle any first touch rod 10.3 once every time it moves up. , and then the roller 10.2 will rotate continuously, and the other first touch rod 10.3 will instantaneously trigger the first proximity switch 10.4 at a long time interval; the scraper is running normally, the chains 3 on both sides move synchronously, and the coal scraper rod 4 will simultaneously trigger the first proximity switches 10.4 of the two first detection devices 10. When the chain jump phenomenon occurs or the coal scraper rod 6 breaks, the coal scraper rod 6 will tilt, and one of the first proximity switches 10.4 cannot be triggered for a long time. When the coal scraper rod 6 completely breaks and falls, the two first proximity switches 10.4 cannot be triggered for a long time.

[0036] The second detection device 11 comprises a supporting wheel 11.1, a wheel axle 11.2, a second touch rod 11.3, and a second proximity switch 11.4. The wheel center of the supporting wheel 11.1 is fixed to one end of the wheel axle 11.2, the second touch rod 11.3 is vertically fixed to the other end of the wheel axle 11.2, the sensing end of the second proximity switch 11.4 faces the end of the second touch rod 11.3, the supporting wheel 11.1 drives the second touch rod 11.3 to rotate circumferentially through the wheel axle 11.2, and the second touch rod 11.3 triggers the second proximity switch 11.4 once for one rotation;

[0037] There are two second detection devices 11, the support wheel 11.1 is arranged on one side of the sprocket wheel 2 inside the scraper head, the tongue plate originally used to support the reversing chain 3 is removed, the wheel shaft 11.2 rotates and penetrates the side wall of the scraper housing 1, and the second proximity switch is fixed on the outer side wall of the scraper housing 1;

[0038] The supporting wheel 11.1 is a special equipment structure in this field, also called a chain supporting wheel. The wheel surface of the supporting wheel 11.1 has a wheel groove matching the chain 3. When the sprocket 2 drives the chain 3 to move, the supporting wheel 11.1 is rotated by the chain 3. When the scraper chain 3 on either side is broken, the supporting wheel 11.1 cannot be driven to rotate by the chain 3, and the corresponding second touch rod 11.3 will not be triggered for a long time. At the same time, after the chain jumps, if the first detection device 10 does not alarm or the personnel do not confirm and deal with it in time after the alarm, the chain 3 on the side of the chain jumps relaxes and sags, and there will be no jamming problem with the supporting wheel 11.1 as a support. When the chain 3 after the chain jumps is misaligned after biting with the sprocket 2, the chain 3 will not come off the wheel due to the action of the supporting wheel groove.

[0039] The signal output ends of the first proximity switch 10.4 and the second proximity switch 11.4 are respectively connected to the signal input end of the controller 12. The controller 12 is a PLC controller. An audible and visual alarm 13 is also included. The controller 12 is electrically connected to the audible and visual alarm 13. Or the output end of the controller 12 can also be directly connected to the input end of the controller of the scraper conveyor;

[0040] If the two first contact rods 10.3 are not triggered for a long time, or one first contact rod 10.3 is not triggered for a long time, a signal will be sent to the controller 12, and then the audible and visual alarm 13 will give an alarm prompt, or the controller 12 will directly control the equipment to alarm and stop; If the second contact rod 11.3 is not triggered for a long time, a signal will also be sent to the controller 12, and then the audible and visual alarm 13 will give an alarm prompt, or the controller 12 will directly control the equipment to alarm and stop.

[0041] Working principle:

[0042] 1. When the scraper conveyor transports materials towards the head, the materials fall into the lower chute 8 through the gate openings 7 on both sides and enter the subordinate equipment. The materials that do not fall into the lower chute 8 and accumulate on the chain 3 are cleaned and diverted by the triangular ends on the chain pressing blocks 9.1 at the gate openings 7 and the discharge box 9.4. The materials that enter the discharge box 9.4 will still merge downward and enter the lower chute 8 and then fall into the subordinate equipment, reducing the probability of the scraper conveyor skipping the chain due to the accumulation of gangue on the chain 3. If the scraper conveyor skips the chain due to special circumstances, it can also be detected by the first detection device 10.

[0043] 2. When the scraper conveyor is running normally, when the coal scraping rod 4 rotates reversely upward from the head sprocket 2, it will first touch the first contact rods 10.3 of the two first detection devices 10, causing the first contact rods 10.3 to drive the drum 10.2 to rotate. When the drum 10.2 rotates, the first proximity switch 10.4 senses that the first contact rod 10.3 passes by and instantaneously operates once without alarming. When each coal scraping rod 4 rotates reversely upward from the head sprocket 2, the first proximity switch 10.4 instantaneously operates once. If the scraper conveyor skips the chain, the coal scraping rod 4 will tilt. One side of the tilted coal scraping rod 4 will not be able to touch the first contact rod 10.3 of one first detection device 10. At this time, when the corresponding first proximity switch 10.4 does not sense the signal for a long time, the controller 12 electrically connects the audible and visual alarm 13 to give an alarm, reminding the on-site personnel to check through the alarm.

[0044] Through the above description: If the scraper chain 3 does not jump the chain and the coal scraping rod 4 breaks, the broken coal scraping rod 4 will also tilt or fall. When the broken coal scraping rod passes the first contact rod 10.3, only when one of the first contact rods 10.3 of the first detection devices 10 is touched and the first contact rod 10.3 acts, the controller 12 will also control the sound and light alarm 13 to alarm, reminding the personnel to check, or the controller 12 directly controls the equipment to alarm and stop. If both first proximity switches 10.4 do not sense a signal when the coal scraping rod 4 passes the first contact rod 10.3, the controller 12 directly controls the sound and light alarm 13 to alarm.

[0045] 3. During the normal operation of the scraper conveyor, the chain 3 drives the supporting wheel 11.1 to rotate normally. When the second proximity switch 11.4 senses the passing of the second contact rod 11.3 during the rotation of the wheel axle 11.2, it acts instantaneously once without alarming. When the scraper conveyor chain 3 breaks and the supporting wheel 11.1 cannot be driven by the chain 3 to rotate, when the second proximity switch 11.4 does not sense a signal, the controller 12 controls the sound and light alarm 13 to alarm or the controller 12 directly controls the equipment to alarm and stop.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multifunctional scraper protection device, characterized in that: It includes a protective material removal device, a first detection device, a second detection device, and a controller; The protective material removal device comprises a chain pressing block, a connecting rod, a connecting plate, and a discharge box. The top of the chain pressing block is fixed to the connecting plate through the connecting rod. There are two protective material removal devices, which are respectively arranged on both sides of the gate opening in the scraper casing. The connecting plate is fixed to the bottom of the scraper slideway. The bottom of the chain pressing block is close to the top of the chain on the scraper bottom plate. The end of the chain pressing block opposite to the moving direction of the chain on the scraper bottom plate is triangular. The discharge box is fixed on the outer side wall of the scraper case corresponding to the protective material removal device, one side of the discharge box is connected to the inside of the scraper case, and the bottom of the discharge box is open and connected to the side wall of the chute below the scraper through a channel; The first detection device includes a pair of brackets, a roller, a first touch rod, and a first proximity switch, wherein the roller is rotatably arranged between one ends of the pair of brackets, a plurality of first touch rods are fixedly arranged on the roller at intervals along the circumferential direction, and the first proximity switch is arranged between the other ends of the pair of brackets, and the sensing end of the first proximity switch faces the end of the first touch rod; There are two first detection devices, which are arranged together on the inner side of the scraper head. The other end of the pair of brackets and the first proximity switch are fixed on the inner side wall of the scraper head. The end of the first feeler rod movably contacts the scraper coal rod of the scraper. The second detection device comprises a supporting wheel, a wheel axle, a second touch rod, and a second proximity switch, wherein the wheel center of the supporting wheel is fixed to one end of the wheel axle, the second touch rod is vertically fixed to the other end of the wheel axle, and the sensing end of the second proximity switch faces the end of the second touch rod; There are two second detection devices, the support wheel is arranged on one side of the sprocket wheel inside the scraper head, the wheel shaft rotates and penetrates the side wall of the scraper case, and the second proximity switch is fixed on the outer side wall of the scraper case; The signal output ends of the first proximity switch and the second proximity switch are respectively connected to the signal input end of the controller.

2. A multifunctional scraper protection device according to claim 1, characterized in that: The bottom of the discharge box is arranged obliquely downward toward the opening.

3. A multifunctional scraper protection device according to claim 2, characterized in that: It also includes an audible and visual alarm, and the controller is electrically connected to the audible and visual alarm.

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