Control system for preventing chain of embedded scraper ash conveying machine from being snapped

Abstract

The utility model provides a control system for preventing a chain of an embedded scraper ash conveying machine from being snapped, which relates to the technical field of embedded scraper ash conveying machines and comprises a driving rotating speed monitoring device, a head wheel rotating speed monitoring device, a tail wheel rotating speed monitoring device and a material blocking monitoring device, and the driving rotating speed monitoring device is arranged on one side of a driving device of the embedded scraper ash conveying machine. The head wheel rotating speed monitoring device is arranged on one side of the head wheel set, and the tail wheel rotating speed monitoring device is arranged on one side of the tail wheel set. The material blocking monitoring device is arranged at the feeding position of the embedded scraper ash conveying machine and is in signal connection with the control end of the embedded scraper ash conveying machine driving device. According to the utility model, the running state of the embedded scraper ash conveyor can be monitored in real time, and different working conditions of chain jamming, snapping and material blocking of the scraper ash conveyor can be timely and effectively judged; and timely shutdown can be realized, so that the risks that a transmission chain and an ash conveying chain of the embedded scraper are broken and a driving device is pulled over due to large load are avoided, and equipment failure time and failure hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of scraper ash conveyors, in particular to a control system for preventing the chain of a scraper ash conveyor from being pulled off. Background Art

[0002] The scraper ash conveyor is a commonly used dust ash conveying device in the field of environmental protection dust removal. It is a transportation equipment that continuously conveys bulk materials by means of a moving scraper chain in a closed rectangular cross-section housing. Since the ash conveyor box body is a closed housing, it has a small cross-sectional area and high stiffness, and no secondary dust generation will occur during the material conveying process, which is beneficial to environmental protection; and it can feed materials at multiple points, and the process layout is flexible.

[0003] The scraper ash conveyor mainly consists of a machine head, a machine tail, an intermediate section, a transmission chain, an ash conveying chain and a driving device. The transmission chain is connected to the driving sprocket of the driving device and the head wheel transmission sprocket, and the ash conveying chain is connected to the head wheel ash conveying sprocket and the tail wheel ash conveying sprocket. During the use process, the main wear parts of the scraper chain are the chain joints, the bottom plate of the machine trough and the guide rail; when there are sticky, large-sized and relatively hard impurities in the material, the ash conveying chain of the ash conveyor is prone to jamming. If the jamming time is long and not discovered and processed in time, the material continuously enters the inside of the ash conveyor, causing internal blockage, resulting in a continuous increase in load and pulling off the ash conveying chain or the transmission chain, which not only affects the normal production operation, but also during the maintenance process, it is necessary to clean the internal material first before maintenance can be carried out, the repair difficulty is large, and dust may be generated during the processing, affecting the environment.

[0004] In the prior patent technology, such as the Chinese patent CN209427629U authorized and announced on September 24, 2019, a real-time monitoring system for a scraper conveyor is disclosed. It monitors material blockage by setting proximity sensors at the discharge port of the scraper conveyor and monitors chain jamming by setting speed sensors at the tail bearing of the scraper conveyor, and can understand the operation status of the scraper conveyor to a certain extent.

[0005] However, in such prior art, the possibility of the ash conveying chain or the transmission chain being pulled off is not considered; for example, when the speed sensor at the machine tail of the scraper conveyor monitors that the machine tail stops rotating, it may be due to jamming caused by material blockage, or it may be due to the chain being directly pulled off. The prior art cannot distinguish and judge these different risk working conditions. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a control system for preventing the chain of a scraper ash conveyor from being pulled off, which can prevent and timely monitor and judge the risk working conditions of the chain of the scraper ash conveyor being pulled off;

[0007] The utility model provides a chain anti - breakage control system for a scraper conveyor for ash transportation, which includes a driving speed monitoring device, a head wheel speed monitoring device, a tail wheel speed monitoring device and a blockage monitoring device. The driving speed monitoring device is arranged on one side of the driving device of the scraper conveyor for ash transportation. The head wheel speed monitoring device is arranged on one side of the head wheel group. The tail wheel speed monitoring device is arranged on one side of the tail wheel group. The blockage monitoring device is arranged at the feeding place of the scraper conveyor for ash transportation, and the blockage monitoring device is signal - connected to the control end of the driving device of the scraper conveyor for ash transportation.

[0008] Furthermore, it also includes a current monitoring device, and the current monitoring device is arranged on the power line of the driving device.

[0009] Furthermore, it also includes an alarm device.

[0010] Furthermore, the alarm device is respectively signal - connected to the head wheel speed monitoring device, the tail wheel speed monitoring device, the blockage monitoring device, the driving speed monitoring device and the current monitoring device.

[0011] Furthermore, the driving speed monitoring device, the head wheel speed monitoring device and the tail wheel speed monitoring device respectively include speed sensors.

[0012] Furthermore, the blockage monitoring device includes a proximity sensor.

[0013] Furthermore, the current monitoring device includes a current sensor.

[0014] Furthermore, a dust discharge valve is arranged at the feeding place of the scraper conveyor for ash transportation, and the blockage monitoring device is signal - connected to the control end of the dust discharge valve.

[0015] Furthermore, the head wheel group includes a head wheel drive sprocket and a head wheel ash - transportation sprocket which are coaxially connected, and the head wheel drive sprocket is connected to the driving device of the scraper conveyor for ash transportation.

[0016] Furthermore, the head wheel speed monitoring device is arranged on one side of the head wheel drive sprocket.

[0017] By setting the driving speed monitoring device, the head wheel speed monitoring device, the tail wheel speed monitoring device and the blockage monitoring device to respectively monitor the driving device speed, the head wheel group speed, the tail wheel group speed and the blockage situation at the feeding place, the utility model can monitor the operation state of the scraper conveyor for ash transportation in real - time, and effectively and timely determine different working conditions such as chain jamming, breakage and blockage of the scraper conveyor for ash transportation. And by signal - connecting the blockage monitoring device to the control end of the driving device of the scraper conveyor for ash transportation to achieve interlocking, it can stop the machine in time to avoid the risk of breakage of the transmission chain and ash - transportation chain of the scraper conveyor and the risk of overturning of the driving device due to large load, thereby reducing the equipment failure time and failure hazards. It can not only be widely used for preventing the chain of the scraper conveyor for ash transportation from breaking, but also can be widely used for preventing the chain of the bucket elevator from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the head of the drag conveyor for ash transportation of the present invention;

[0021] Figure 3 is a schematic diagram of the tail of the drag conveyor for ash transportation of the present invention;

[0022] Figure 4 is a schematic side view of the ash transportation chain of the drag conveyor for ash transportation of the present invention;

[0023] Figure 5 is a schematic top view of the ash transportation chain of the drag conveyor for ash transportation of the present invention;

[0024] DESCRIPTION OF THE REFERENCE NUMERALS

[0025] 1 - driving device; 2 - transmission chain; 3 - head wheel set; 4 - tail wheel set; 5 - blockage monitoring device; 6 - box body; 7 - ash transportation chain; 8 - feeding place; 9 - discharging place; 10 - driving speed monitoring device; 11 - head wheel speed monitoring device; 12 - tail wheel speed monitoring device; 13 - driving sprocket; 14 - head wheel transmission sprocket; 15 - head wheel ash transportation sprocket; 16 - tail wheel ash transportation sprocket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions of the present invention in combination with the embodiments. Obviously, the described embodiments are 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.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Embodiment 1

[0030] As Figures 1-5 shown, the present utility model provides a chain anti-pulling break control system for a scraper ash conveyor, which includes a driving speed monitoring device 10, a head wheel speed monitoring device 11, a tail wheel speed monitoring device 12 and a blockage monitoring device 5. The driving speed monitoring device 10 is arranged on one side of the driving device 1 of the scraper ash conveyor, the head wheel speed monitoring device 11 is arranged on one side of the head wheel set 3, and the tail wheel speed monitoring device 12 is arranged on one side of the tail wheel set 4; the blockage monitoring device 5 is arranged at the feeding place 8 of the scraper ash conveyor, and the blockage monitoring device 5 is signal-connected to the control end of the driving device 1 of the scraper ash conveyor.

[0031] Specifically, the driving speed monitoring device 10, the head wheel speed monitoring device 11, the tail wheel speed monitoring device 12, and the blockage monitoring device 5 respectively monitor the rotation speed of the driving device 1, the rotation speed of the head wheel set 3, the rotation speed of the tail wheel set 4, and the blockage condition at the feeding point 8. The signal connection mode of the blockage monitoring device 5 includes electrical signal connection through electrical wires, optical signal connection through optical fibers, wireless signal connection through wireless networks, etc. The material enters the box body 6 from the feeding point and is conveyed by the scraper conveyor buried with the ash conveying chain 7 arranged in the box body 6, and leaves the box body 6 at the discharging point 9, which belongs to the prior art of the scraper conveyor for ash conveying and will not be elaborated here.

[0032] (1) During the normal ash conveying process of the scraper conveyor for ash conveying, the rotation speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all normal, and the blockage monitoring device 5 is in a normally closed state;

[0033] (2) When the rotation speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all 0, there may be a blockage phenomenon of the transmission chain 2 of the scraper conveyor, and personnel go to the site to check the equipment;

[0034] (3) When the rotation speed of the driving device 1 is normal, and the rotation speeds of the head wheel set 3 and the tail wheel set 4 are both 0, there may be a breakage phenomenon of the transmission chain 2 of the scraper conveyor, and personnel go to the site to check the equipment;

[0035] (4) When the rotation speeds of the driving device 1 and the head wheel set 3 are normal, and the rotation speed of the tail wheel set 4 is 0, there may be a breakage phenomenon of the ash conveying chain 7 of the scraper conveyor, and personnel go to the site to check the equipment;

[0036] (5) When the rotation speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all 0, and the blockage detector monitors that the feeding at the feeding point 8 continues, indicating that the scraper conveyor is blocked. At this time, the blockage detector disconnects and transmits the disconnection signal to the control end of the driving device 1 (specifically the driving motor) of the scraper conveyor for ash conveying, and the driving device 1 stops, and the scraper conveyor stops working to prevent the transmission chain 2 and the ash conveying chain 7 of the scraper conveyor from breaking.

[0037] Embodiment 2

[0038] It further includes a current monitoring device, and the current monitoring device is arranged on the electric wire of the driving device 1.

[0039] Specifically, compared with the foregoing embodiment, in this embodiment, by monitoring the current of the driving device 1, the judgment mechanism is further improved. Specifically, on the basis of Embodiment 1, the current monitoring device monitors the power-on working condition of the driving device 1. If the current of the driving device 1 continues to increase while the rotation speed of the driving device 1 is 0, it indicates that there may be a blockage of the chain.

[0040] Embodiment 3

[0041] It further includes an alarm device (not shown). The alarm device is respectively signal-connected to the head wheel speed monitoring device 11, the tail wheel speed monitoring device 12, the material blockage monitoring device 5, the driving device 1 speed monitoring device, and the current monitoring device. The driving device 1 speed monitoring device, the head wheel speed monitoring device 11, and the tail wheel speed monitoring device 12 respectively include speed sensors. The material blockage monitoring device 5 includes proximity sensors. The current monitoring device includes current sensors.

[0042] Specifically, compared with the foregoing embodiments, in this embodiment, the alarm device gives an alarm in a timely manner for the monitoring results. The alarm device specifically includes, for example, a controller and a speaker, etc. Different alarm sounds are set in advance for various different monitoring results. When the controller receives signals from different monitoring devices and thus judges different monitoring results, it controls the speaker to emit corresponding alarm sounds; the speed sensors, proximity sensors, and current sensors are all products of the prior art. Among them, the proximity sensor judges the amount of material at the feeding place 8 by measuring the distance from the material; the current sensor can be a Hall closed-loop current sensor, etc., which is sleeved on the conducting wire of the driving device 1 to measure the current, and all can be directly purchased, and their structural principles will not be elaborated.

[0043] Embodiment 4

[0044] A dust discharge valve is provided at the feeding place 8 of the scraper conveyor for ash transportation. The material blockage monitoring device 5 is signal-connected to the control end of the dust discharge valve.

[0045] Specifically, the dust discharge valve is an electric control valve. Compared with the foregoing embodiments, in this embodiment, the material blockage monitoring device 5 is also interlocked with the dust discharge valve. When it is monitored that the scraper conveyor is blocked with materials, the material blockage monitoring device 5 disconnects and transmits the disconnection signal to the control ends of the driving device 1 and the dust discharge valve. The driving device 1 stops running, and the dust discharge valve stops feeding, preventing the transmission chain 2 and the ash transportation chain 7 of the scraper conveyor from being pulled off.

[0046] Embodiment 5

[0047] The head wheel set 3 includes a head wheel drive sprocket 14 and a head wheel ash transportation sprocket 15 that are coaxially connected. The head wheel drive sprocket 14 is connected to the driving device 1 of the scraper conveyor for ash transportation. The head wheel speed monitoring device 11 is arranged on one side of the head wheel drive sprocket 14.

[0048] Specifically, the head wheel drive sprocket 14 is connected to the drive sprocket 13 on the driving device 1 through a transmission chain 2. The head wheel ash transportation sprocket 15 rotates synchronously with the head wheel drive sprocket 14; the tail wheel set 4 includes a tail wheel ash transportation sprocket 16, and the ash transportation chain 7 is connected between the head wheel ash transportation sprocket 15 and the tail wheel ash transportation sprocket 16. The head wheel speed monitoring device 11 is used to monitor the speed condition of the head wheel drive sprocket 14, and the tail wheel speed monitoring device 12 is used to monitor the speed condition of the tail wheel ash transportation sprocket 16.

[0049] Working mode and principle of the utility model:

[0050] (1) During the normal ash transportation process of the scraper conveyor, the current of the driving device 1 (specifically the driving motor) is within the rated current range, the rotational speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all normal, and the blockage monitoring device 5 is in a normally closed state;

[0051] (2) When the current of the driving device 1 continues to increase, and at the same time, the rotational speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all 0, there may be a blockage phenomenon of the transmission chain 2 of the scraper conveyor at this time. The alarm device issues an alarm for the blockage of the transmission chain 2, and personnel go to the site to check the equipment;

[0052] (3) When the rotational speed of the driving device 1 is normal, and the rotational speeds of the head wheel set 3 and the tail wheel set 4 are both 0, there may be a breakage phenomenon of the transmission chain 2 of the scraper conveyor at this time. The alarm device issues an alarm for the breakage of the transmission chain 2, and personnel go to the site to check the equipment;

[0053] (4) When the rotational speeds of the driving device 1 and the head wheel set 3 are normal, and the rotational speed of the tail wheel set 4 is 0, there may be a breakage phenomenon of the ash transportation chain 7 of the scraper conveyor at this time. The alarm device issues an alarm for the breakage of the ash transportation chain 7, and personnel go to the site to check the equipment;

[0054] (5) When the current of the driving device 1 continues to increase, and the rotational speeds of the driving device 1, the head wheel set 3, and the tail wheel set 4 are all 0, the blockage detector monitors that the feeding at the feeding place 8 continues, indicating that the scraper conveyor is blocked. At this time, the blockage detector disconnects and transmits the disconnection signal to the control ends of the driving device 1 and the ash discharge valve. The driving device 1 stops, and the ash discharge valve stops feeding. The scraper conveyor stops operating, and the alarm device issues an alarm for blocking and stopping, preventing the transmission chain 2 and the ash transportation chain 7 of the scraper conveyor from breaking.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A chain anti-pulling break control system for a scraper ash conveyor, characterized in that, It includes a driving speed monitoring device, a head wheel speed monitoring device, a tail wheel speed monitoring device and a material blockage monitoring device. The driving speed monitoring device is arranged on one side of the driving device of the scraper ash conveyor. The head wheel speed monitoring device is arranged on one side of the head wheel set. The tail wheel speed monitoring device is arranged on one side of the tail wheel set. The material blockage monitoring device is arranged at the feeding place of the scraper ash conveyor, and the material blockage monitoring device is signal-connected to the control end of the driving device of the scraper ash conveyor.

2. The chain anti-breaking control system for the scraper ash conveyor according to claim 1, characterized in that It further includes a current monitoring device, and the current monitoring device is arranged on the power lead of the driving device.

3. The chain anti-breaking control system for the scraper ash conveyor according to claim 2, characterized in that, It further includes an alarm device.

4. The chain anti-pulling and breaking control system of the scraper ash conveyor according to claim 3, characterized in that, The alarm device is respectively signal-connected to the head wheel speed monitoring device, the tail wheel speed monitoring device, the material blockage monitoring device, the driving speed monitoring device and the current monitoring device.

5. The chain anti-pulling break control system for the scraper ash conveyor according to claim 1, characterized in that, The driving speed monitoring device, the head wheel speed monitoring device and the tail wheel speed monitoring device respectively include speed sensors.

6. The chain anti-breaking control system for the scraper ash conveyor according to claim 2, characterized in that, The material blockage monitoring device includes a proximity sensor.

7. The chain anti-breakage control system for the scraper ash conveyor according to claim 2, characterized in that, The current monitoring device includes a current sensor.

8. The chain anti-breakage control system for the scraper ash conveyor according to claim 1, characterized in that, A dust discharge valve is provided at the feeding place of the scraper ash conveyor, and the material blockage monitoring device is signal-connected to the control end of the dust discharge valve.

9. The chain anti-pulling break control system for the scraper ash conveyor according to claim 1, wherein The head wheel set includes a head wheel drive sprocket and a head wheel ash conveyor sprocket which are coaxially connected, and the head wheel drive sprocket is connected to the driving device of the scraper ash conveyor.

10. The chain anti-pulling and breaking control system for the scraper ash conveyor according to claim 9, characterized in that, The head wheel speed monitoring device is arranged on one side of the head wheel drive sprocket.

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