CN210236262U - Air cushion belt conveyor protection system - Google Patents
Air cushion belt conveyor protection system Download PDFInfo
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- CN210236262U CN210236262U CN201920783564.5U CN201920783564U CN210236262U CN 210236262 U CN210236262 U CN 210236262U CN 201920783564 U CN201920783564 U CN 201920783564U CN 210236262 U CN210236262 U CN 210236262U
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Abstract
The utility model relates to an air cushion belt conveyor protection system, include: a control unit; a material weight control module; the solid flow sensor is connected with the material weight control module and is used for detecting the sectional area of material accumulation at the feed inlet; the speed detector is connected with the material weight control module and is used for detecting the advancing speed of the conveying rubber belt in real time; the material weight control module receives the sectional area, the advancing speed and the material density and outputs the material weight of the material on the conveying rubber belt in real time; a gas pressure sensor for detecting a pressure of the gas chamber; a displacement sensor for detecting the thickness of the gas film; the frequency converter is connected with the control unit and each fan, and the air speed of each fan is adjusted in real time according to the air pressure corresponding to the weight of the material; when the pressure of the air chamber is lower than the lower limit value of the preset air pressure range or the thickness of the air film is smaller than the lower limit value of the preset safety range, the control unit controls the conveyor to stop. The utility model discloses detect and control when to gas film thickness and atmospheric compaction, reduce equipment failure rate.
Description
Technical Field
The utility model belongs to the technical field of the bulk cargo is carried, concretely relates to air cushion belt conveyor protection system.
Background
The belt conveyor is a universal continuous bulk material conveying device at home and abroad, and has wide application in the industries of food, coal mine, metallurgy, tobacco, electric power and the like.
In order to meet the requirements of long distance, large transportation volume and automation of bulk material conveying, the belt conveying technology is continuously improved, and various belt conveyors are extended. The air cushion belt conveyor is commonly used in the existing market, an air chamber replaces a carrier roller, the running resistance is effectively reduced, the energy consumption is obviously reduced, the air cushion belt conveyor is stable in conveying and free of jolt, a larger groove angle and a higher conveying speed can be formed, and therefore the air cushion belt conveyor is popular in the conveying industry. However, the air cushion belt conveyor is greatly influenced by the air chamber, and when the thickness of the air film is insufficient due to reasons such as air supply and the like, the conveyor belt is extremely easy to be seriously damaged, and the risk of equipment failure and loss is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an air cushion belt conveyor protection system detects and controls when air film thickness and atmospheric pressure to air cushion belt conveyor, guarantees the normal transportation of conveyor belt, avoids causing conveyor belt wearing and tearing because of air film thickness is little or the atmospheric pressure is low, improves the sticky tape live time and reduces equipment failure rate.
In order to solve the technical problem, the utility model provides a control method adopts following technical scheme to realize:
the utility model provides an air cushion belt conveyor protection system, air cushion belt conveyor includes conveyor belt, is located the air chamber of conveyor belt below and be used for to the fan of air chamber air feed, conveyor belt with form the air film between the air chamber, its characterized in that is provided with a plurality ofly along the conveying length interval the fan, air cushion belt conveyor protection system includes: a control unit; a weight processing module, comprising: the material weight control module is connected with the control unit; the solid flow sensor is connected with the material weight control module, is positioned above the conveying rubber belt at the feed inlet and is used for detecting the cross section area of material accumulation on the conveying rubber belt at the feed inlet; the speed detector is connected with the material weight control module and is used for detecting the advancing speed of the conveying rubber belt in real time; the material weight control module receives the sectional area, the advancing speed and the material density and outputs the material weight of the material on the conveying rubber belt in real time; a gas film control module, comprising: the gas pressure sensor is arranged on the side wall in the gas chamber, is connected with the control unit and is used for detecting the pressure of the gas chamber in real time; the displacement sensor is connected with the control unit and is used for detecting the thickness of the gas film in real time; the frequency converter is respectively connected with the control unit and each fan, and adjusts the wind speed of each fan in real time according to the air pressure corresponding to the weight of the material; and when the detected air chamber pressure is lower than the lower limit value of a preset air pressure range or the detected air film thickness is smaller than the lower limit value of a preset safety range, the control unit controls the conveyor to stop.
In order to achieve the purpose of self-detecting and handling the fault of the air cushion belt conveyor by the system, and reduce the probability of equipment halt, the air cushion belt conveyor protection system further comprises: at least one standby motor arranged between two adjacent fans; and when the detected air chamber pressure is lower than the lower limit value of the preset air pressure range, or the detected air film thickness is smaller than the lower limit value of the preset safety range, starting each standby motor, and when the detected air chamber pressure is lower than the lower limit value of the preset air pressure range, or the detected air film thickness is smaller than the lower limit value of the preset safety range, controlling the conveyor to stop by the control unit.
In order to timely feed back equipment failure to an operator, the air cushion belt conveyor protection system as described above further includes: and the alarm device is connected with the control unit, and the control unit controls the alarm device to send out an alarm signal while controlling the conveyor to stop.
In order to accurately detect the pressure of the air chamber, the protection system of the air cushion belt conveyor is provided with a plurality of air pressure sensors, and each air pressure sensor is hermetically connected to the inner wall of the air chamber between two adjacent fans.
According to the protection system of the air cushion belt conveyor, in order to accurately detect the thickness of the air film, a plurality of air holes are formed in the air chamber, and the air penetrating through the air holes forms the air film between the conveying belt and the air chamber; the number of the displacement sensors is multiple, and each displacement sensor is positioned below the air hole at the minimum pressure supply position of the air chamber between two adjacent fans.
In the air cushion belt conveyor protection system, each displacement sensor is a laser displacement sensor in order to improve the accuracy of air film thickness detection.
In order to realize the programmable control of the protection system, the control unit is a PLC controller, and the PLC controller includes: the CPU controller is in communication connection with the frequency converter; the analog input module is in communication connection with the CPU controller and is used for respectively receiving signals output by the displacement sensor, the gas pressure sensor, the solid flow sensor and the speed detector; and the digital quantity output module is in communication connection with the CPU controller and the alarm device respectively.
The air cushion belt conveyor protection system further comprises a power supply which supplies power to the PLC through an isolation transformer.
According to the air cushion belt conveyor protection system, the CPU controller is in communication connection with the frequency converter through an Ethernet interface.
According to the air cushion belt conveyor protection system, the analog input module and the digital output module are in communication connection with the CPU controller through Ethernet interfaces.
Compared with the prior art, the utility model discloses an advantage and beneficial effect are: the cross section area of the material entering from the feeding port is detected through the solid flow sensor, the advancing speed of the conveying rubber belt is detected through the speed detector, so that the weight of the material on each section of the conveying rubber belt can be obtained in real time, the air speed of each fan is adjusted in real time according to the air pressure corresponding to the weight of each section of the material, the pressure of each section of the air chamber is continuously adjusted, the air film control is effectively controlled, the uniformity of the thickness of the whole air film is improved, and the conveying performance of the conveyor is improved; and the gas pressure sensor detects the pressure of the air chamber in real time and the displacement sensor detects the thickness of the air film, when the pressure of the air chamber is smaller than the lower limit value of a preset air pressure range or the thickness of the air film is smaller than the lower limit value of a preset safety range, the condition that the current conveying rubber belt is close to the outer wall of the air chamber is indicated, the abrasion risk of the conveying rubber belt exists, the conveyor is controlled to stop at the moment, so that the conveying rubber belt is protected, the service time of the rubber belt is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of one embodiment of an air cushion belt conveyor protection system of the present invention;
fig. 2 is a block diagram of another embodiment of the protection system for an air cushion belt conveyor according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
In order to detect faults in the using process of an air cushion belt conveyor and protect the conveyor, the embodiment provides a protection system for the air cushion belt conveyor, the air cushion belt conveyor comprises a conveying rubber belt (not shown) for bearing materials, an air chamber (not shown) located below the conveying rubber belt and fans (not shown) for supplying air to the air chamber, air holes are formed in the air chamber, air is supplied to the fans to blow into a region between the conveying rubber belt and the air chamber through the air holes, an air film (not shown) is formed in the region, the number of the fans 24 is multiple, the fans are distributed at intervals along the conveying length of the conveying rubber belt, the conveying length is assumed to be 30 meters in the embodiment, the fans 24 are spaced at 15 meters, and therefore three fans 24 are needed. In the embodiment, the pressure control range of the air chamber is 2500 to 5000Pa, the weight of the material on the corresponding conveying belt is 0 to 200kg, and the pressure of the air chamber linearly changes along with the weight of the material to obtain a linear change function relation, so that the set required air pressure can be obtained according to the weight of the material.
Referring to fig. 1, a block diagram of one embodiment of an air cushion belt conveyor protection system is shown. The air cushion belt conveyor comprises a control unit 10, an air film control module 20 and a weight processing module 30, wherein the weight processing module 30 comprises a material weight control module 31, a speed detector 32 and a solid flow sensor 33, the speed detector 32 is used for detecting the advancing speed V m/s of materials on a conveyor belt in real time, the speed detector 32 is specifically mounted on a shaft of a redirection roller of the conveyor, and the solid flow sensor 33 is used for detecting the cross section S m of material accumulation on the conveyor belt at a feed inlet2Specifically, the solid flow sensor 33 is suspended and installed at the position about 5 meters above the belt at the feed inlet.
In the transportation process of the material on the conveying belt, the weight of the material on the conveying belt is calculated and stored, and in the embodiment, the material weight control module 31 receives the material density value rho kg/m3The advancing speed V and the material sectional area S, assuming that the conveying length is L meters, and the length of the storage segments is 1 meter by taking 1 meter as the weight, and the time for the material to advance by 1 meter is represented by the formula (1): 1=1 × V1+1 × V2+1 × V3+1 × V4+ … … +1 × Vn (Vn is the advancing speed of the n-th second conveying tape), so that the weight of the material per meter is calculated by the formula (2): m (kg) = S × V1 × ρ + S × V2 × ρ + … … + S × Vn × ρ, the material re-segmentation storage area is divided into L segments, each segment is 1 meter, when the control unit controls and times n seconds (namely the conveying adhesive tape advances 1 meter), the calculated corresponding material weight is stored in the corresponding storage area, and the material weight of each segment of conveyed material is continuously updated according to the queue control principle in the process of conveying the material on the conveying adhesive tape.
In this embodiment, the relationship between the pressure of the air chamber and the weight of the material can be expressed as formula (3): p = K Msum1.2, where K is the scaling factor (the range of the scaling factor K can be determined from conveyor simulation and testing), 1.2 is the safety factor, MsumIs the sum of the weights M of the materials on the conveyor belt per 1 meter conveyed, calculated by the formula (2).
Referring again to fig. 1, a gas pressure sensor 21 is disposed on an inner sidewall of the gas chamber for detecting a gas chamber pressure in the gas chamber in real time, and a displacement sensor 22 is for detecting a gas film thickness in real time. Specifically, in the present embodiment, the gas pressure sensors 21 are disposed on the inner side wall of the air chamber at the intermediate position between the two adjacent fans 24, that is, two gas pressure sensors 21 should be disposed with respect to three fans 24 disposed at a conveying length of 30 meters; and in the present embodiment, the displacement sensor 22 is installed below the air hole (for example, within 10mm below the air hole) at the minimum pressure supply position of the air chamber between two adjacent fans 24, that is, two displacement sensors 22 should be provided with respect to three fans 24 provided with a conveying length of 30 meters, and the displacement sensor 22 in the present embodiment is a laser displacement sensor, so as to improve the accuracy of detecting the thickness of the air film.
According to the calculated air chamber pressure and the required set air pressure, the control unit 10 controls and adjusts the frequency of the frequency converter 23 to adjust the rotating speed of each fan 23, so as to adjust the air supply volume of each fan 24 and further adjust the air chamber pressure, and the thickness of the air film is continuously detected by the displacement sensor 22 in the process of adjusting the air chamber pressure. When the gas film thickness is less than the lower limit value of the preset safety range (e.g., 3 mm), or the gas chamber pressure detected by the gas pressure sensor 21 is less than the lower limit value of the preset gas pressure range (e.g., 2000 Pa), the control unit 10 controls the conveyor to stop.
In the protection system of the air cushion belt conveyor, the sectional area of the material entering from the feed inlet is detected by the solid flow sensor 33, and the advancing speed of the conveying rubber belt is detected by the speed detector 32, so that the weight of the material on each section of the conveying rubber belt can be obtained in real time, the pressure of the air chamber of each section of the air chamber is continuously adjusted according to the different weight of each section of the material, the thickness of an air film is effectively controlled, the uniformity of the thickness of the whole air film is improved, and the conveying performance of the conveyor is improved; and the thickness of the air film and the air pressure are detected in real time, so that the abrasion between the conveying rubber belt and the outer wall of the air chamber is avoided, the conveying rubber belt is protected, and the service life of the rubber belt is prolonged.
Example two
Referring to fig. 2, a block diagram of another embodiment of the protection system for an air cushion belt conveyor of the present embodiment is shown.
In this embodiment, the control unit 10 is a PLC (programmable logic controller) and includes a CPU controller 11, an analog input module 12 and a digital output module 13, where the analog input module 12 and the digital output module 13 are respectively in communication with the CPU controller 11 through an optical fiber ethernet; the gas pressure sensor 21, the displacement sensor 22, the speed detector 32 and the solid flow sensor 33 are connected with and communicated with the analog input module 12 through current analog quantity signals; in this embodiment, the frequency converter 23 is a multi-machine driving frequency converter, and is in bidirectional communication with the ethernet interface of the CPU controller 11 through an optical fiber ethernet, that is, the speed parameters and the like required by the multi-machine driving frequency converter are acquired from the CPU controller 11 through the ethernet, the feedback signals thereof are also transmitted to the CPU controller 11 through the ethernet, and the plurality of fans 24 are connected to the load end cable of the multi-machine driving frequency converter through the normally open contacts of the contactor. Further, the power supply 50 supplies power to the PLC controller 10 through the isolation transformer 60.
In addition, the protection system for the air-cushion belt conveyor in the embodiment further includes a standby fan 25, and the frequency converter 23 controls the standby fan 25 in the same manner as the fans 24, and in the embodiment, two standby fans 25 are provided, each of which is disposed between two adjacent fans 24.
In the present embodiment, the CPU controller 11 controls the frequency of the frequency converter 23 to adjust the rotation speed of each fan 23 according to the calculated cell pressure in the first embodiment, so as to adjust the air supply volume of each fan 24, so that the calculated cell pressure reaches the set desired air pressure (or the set desired air pressure range), and the film thickness is continuously detected by the displacement sensor 22 in the process of adjusting the cell pressure. After the adjusted air chamber pressure, if the air film thickness is still smaller than the lower limit value (for example, 3 mm) of the preset safety range, or the air chamber pressure is still smaller than the lower limit value of the preset air pressure range, the CPU controller 11 controls the standby fan 25 to be activated for fault emergency treatment, and after the standby fan 25 is activated, if the air film thickness is still smaller than the lower limit value (for example, 3 mm) of the preset safety range, or the air chamber pressure is still smaller than the lower limit value of the preset air pressure range, the CPU controller 11 indicates an equipment fault, and controls the alarm device 40 (for example, an indicator lamp, a buzzer, a horn and the like) to send out an alarm signal (for example, an acoustic signal, an optical signal and the like) while controlling the. In the embodiment, the alarm device 40 is in communication connection with the digital output module 13, and sends an alarm prompt signal for equipment failure, so that an operator can timely process the alarm prompt signal.
The process of adjusting the pressure of the air chamber is mainly embodied in the processes of starting feeding (no material exists at the rear section, close to the discharge port, of the conveying rubber belt in the case) and discharging after feeding is finished (no material exists at the front section, close to the feed port, of the conveying rubber belt along with discharging in the case), and in the conveying process of completely bearing the material on the conveying rubber belt along the length of the conveying rubber belt, because the weight change of the material per 1 meter is not large, namely, the weight of the material of 1 meter at the beginning of feeding is basically the same as the weight of the material of 1 meter at the subsequent discharging, the pressure of the air chamber is not changed greatly or even does not.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides an air cushion belt conveyor protection system, air cushion belt conveyor includes conveyor belt, is located the air chamber of conveyor belt below and be used for to the fan of air chamber air feed, conveyor belt with form the air film between the air chamber, its characterized in that is provided with a plurality ofly along the conveying length interval the fan, air cushion belt conveyor protection system includes:
a control unit;
a weight processing module, comprising:
the material weight control module is connected with the control unit;
the solid flow sensor is connected with the material weight control module, is positioned above a conveying rubber belt at a feed inlet of the air cushion belt conveyor and is used for detecting the cross section area of material accumulation on the conveying rubber belt at the feed inlet;
the speed detector is connected with the material weight control module and is used for detecting the advancing speed of the conveying rubber belt in real time;
the material weight control module receives the sectional area, the advancing speed and the material density and outputs the material weight of the material on the conveying rubber belt in real time;
a gas film control module, comprising:
the gas pressure sensor is arranged on the side wall in the gas chamber, is connected with the control unit and is used for detecting the pressure of the gas chamber in real time;
the displacement sensor is connected with the control unit and is used for detecting the thickness of the gas film in real time;
the frequency converter is respectively connected with the control unit and each fan, and adjusts the wind speed of each fan in real time according to the air pressure corresponding to the weight of the material;
and when the detected air chamber pressure is lower than the lower limit value of a preset air pressure range or the detected air film thickness is smaller than the lower limit value of a preset safety range, the control unit controls the conveyor to stop.
2. The air cushion belt conveyor protection system of claim 1, further comprising:
at least one standby motor arranged between two adjacent fans;
when the detected gas film thickness is smaller than the lower limit value of the preset safety range, or the detected gas film thickness is smaller than the lower limit value of the preset safety range, starting each standby motor, and when the detected gas chamber pressure is lower than the lower limit value of the preset gas pressure range, or the detected gas film thickness is smaller than the lower limit value of the preset safety range, controlling the conveyor to stop by the control unit.
3. The air cushion belt conveyor protection system of claim 1 or 2, further comprising:
and the alarm device is connected with the control unit, and the control unit controls the alarm device to send out an alarm signal while controlling the conveyor to stop.
4. The air cushion belt conveyor protection system of claim 1 or 2, wherein the number of the air pressure sensors is plural, and each air pressure sensor is hermetically connected to an inner wall of the air chamber between two adjacent fans.
5. The air cushion belt conveyor protection system of claim 1 or 2,
a plurality of air holes are formed in the air chamber, and the air penetrating through the air holes forms the air film between the conveying rubber belt and the air chamber;
the number of the displacement sensors is multiple, and each displacement sensor is positioned below the air hole at the minimum pressure supply position of the air chamber between two adjacent fans.
6. The air cushion belt conveyor protection system of claim 5, wherein each displacement sensor is a laser displacement sensor.
7. The air cushion belt conveyor protection system of claim 3, wherein the control unit is a PLC controller comprising:
the CPU controller is in communication connection with the frequency converter;
the analog input module is in communication connection with the CPU controller and is used for respectively receiving signals output by the displacement sensor, the gas pressure sensor, the solid flow sensor and the speed detector;
and the digital quantity output module is in communication connection with the CPU controller and the alarm device respectively.
8. The air cushion belt conveyor protection system of claim 7, further comprising a power supply that powers the PLC controller via an isolation transformer.
9. The air cushion belt conveyor protection system of claim 7, wherein the CPU controller is communicatively coupled to the frequency converter via an Ethernet interface.
10. The air cushion belt conveyor protection system of claim 7, wherein the analog input module and the digital output module are communicatively coupled to the CPU controller via an Ethernet interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920783564.5U CN210236262U (en) | 2019-05-28 | 2019-05-28 | Air cushion belt conveyor protection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920783564.5U CN210236262U (en) | 2019-05-28 | 2019-05-28 | Air cushion belt conveyor protection system |
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| CN210236262U true CN210236262U (en) | 2020-04-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116803864A (en) * | 2023-08-25 | 2023-09-26 | 苏州纽酷输送机械有限公司 | Intelligent air cushion conveyor |
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2019
- 2019-05-28 CN CN201920783564.5U patent/CN210236262U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116803864A (en) * | 2023-08-25 | 2023-09-26 | 苏州纽酷输送机械有限公司 | Intelligent air cushion conveyor |
| CN116803864B (en) * | 2023-08-25 | 2023-11-14 | 苏州纽酷输送机械有限公司 | Intelligent air cushion conveyor |
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Effective date of registration: 20220602 Address after: 266000 No. 146, chengma Road, Tongji street, Jimo District, Qingdao, Shandong Patentee after: Opruitai Environmental Technology Co.,Ltd. Address before: 100029 508, 5th floor, 18 Yumin Road, Xicheng District, Beijing Patentee before: Beijing opretime Engineering Technology Co.,Ltd. |
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