CN113023285B - Control method of mixed conveying device for civil engineering - Google Patents
Control method of mixed conveying device for civil engineering Download PDFInfo
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- CN113023285B CN113023285B CN202110375648.7A CN202110375648A CN113023285B CN 113023285 B CN113023285 B CN 113023285B CN 202110375648 A CN202110375648 A CN 202110375648A CN 113023285 B CN113023285 B CN 113023285B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
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Abstract
The invention provides a control method of a mixed conveying device for civil engineering, which particularly adopts a mode of combining a pipe belt conveyor and a screw conveyor to realize lifting and conveying of silt materials in civil engineering, and is matched with a flow monitor to realize comparison of front and rear flows, so that the forward and reverse rotation speeds of the screw conveyor are controlled to avoid material accumulation, and the problem that the pipe belt conveyor cannot convey materials in a high inclination angle direction is solved.
Description
Technical Field
The present invention relates to a control method of a conveying device in civil engineering work, and more particularly to a control method of a hybrid conveying device for civil engineering work.
Background
In the prior art, a circular tube conveyor is often used in civil work for conveying various excavated silt, and a common conveying belt can be adopted to be arranged in a closed conveying mode, so that the circular tube conveyor has the factors of dust prevention, conveying speed and the like, and is widely applied, in order to meet conveying work at different height positions, the circular tube conveyor is often arranged in a Z-shaped conveying mechanism for lifting and conveying work in the civil work, however, in specific application, the lifting angle has a certain limit, the highest lifting angle is often arranged at about 30 degrees, and the circular tube conveyor cannot be effectively lifted due to an overlarge angle, so that silt materials are accumulated at the initial position of the lifting end of the Z-shaped structure, the materials break the seal of the circular tube conveyor, and the materials are scattered outside; similarly, when the materials are conveyed from a high position to a low position in a bidirectional conveying process, the materials are also stacked at the initial position of the lifting end of the Z-shaped structure due to the gravity, damage is also caused, and effective conveying cannot be realized.
Disclosure of Invention
In view of the above technical problems, the present invention provides a method for controlling a hybrid conveyor for civil engineering, comprising a hybrid conveyor for civil engineering, the hybrid conveyor comprising a belt conveyor, a screw conveyor, a flow rate detection device, and a control device, wherein the belt conveyor comprises a low section part, a middle section part, a high section part, a conveyor belt, and a bi-directional motor, the low section part, the middle section part, and the high section part being sequentially formed in a zigzag shape; the flow detection device comprises a low-section flow detector and a high-section flow detector, wherein the low-section flow detector is arranged on the rear side of a feeding port of the low-section part; the high-section flow detector is arranged at the front end of the high-section part and is arranged close to the middle-section part;
preferably, the control method includes the steps of:
(1) the control device controls the low section part, the middle section part and the high section part to adjust the conveying angle, after the conveying angle is adjusted, a conveying mode is selected, the conveying mode comprises lifting conveying and backfilling conveying, if the conveying mode is lifting conveying, the step (2) is carried out, and if the conveying mode is backfilling conveying, the step (3) is carried out;
(2) the lifting conveying comprises the following steps:
(2.1) starting the forward operation of the pipe belt conveyor, wherein the low-section flow detector is used for detecting the material flow A input to the low-section part, and after the control device acquires the electric signal of the material flow A of the low-section flow detector, the forward operation of the spiral conveyor is started to control the spiral motor and rotate at the initial rotating speed V0Running and starting timing, after the set initial time T0Then, the high-section flow detector is used for detecting the material flow B output from the middle section part, and the control device acquires a signal of the material flow B;
(2.2) comparing the material flow A with the material flow B by the control device, if the material flow A is larger than the material flow B, indicating that the sediment materials are accumulated, and controlling to increase the rotating speed V of a spiral motor of the spiral conveyor by the control device; if the material flow A is less than or equal to the material flow B, maintaining the rotating speed of the spiral conveyor;
(2.3) the step (2.2) further comprises increasing the rotation speed of the screw motor in steps, wherein the rotation speed of each increment is delta V = 0.05V0I.e. V = V0+ n x Δ V, where n is the number of adjustments and the time interval between two adjacent adjustments is T0After n times of adjustment, if the material flow A is less than or equal to the material flow B, the rotating speed of the spiral conveyor is kept;
(2.4) in the step (2.2), speed limiting control is further provided, and the adjusting range of the rotating speed V of the spiral motor is as follows: v0≤V≤2 V0Alarming when the range is exceeded, and processing by workers;
(3) the backfill conveying comprises the following steps:
(3.1) starting the reverse operation of the pipe belt conveyor, wherein the high-section flow detector is used for detecting the material flow D input to the high-section part, and the control device acquires the high-section flow detectionAfter the material flow D of the device is electrically signaled, the screw conveyer is started in the forward direction to control the screw motor and the initial rotating speed is V1The positive speed of the sediment is used for slowing down the downward conveying of the sediment materials in the middle section part, and the timing is started, and the sediment materials are conveyed for a set initial time T0Then, the low-stage flow detector is used for detecting the material flow C output from the low-stage part, and the control device acquires a signal of the material flow C;
(3.2) comparing the material flow C with the material flow D by the control device, if the material flow C is larger than the material flow D, indicating that silt materials are accumulated, and controlling and increasing the forward rotating speed V' of a spiral motor of the spiral conveyor by the control device; if the material flow D is more than 0.95 and less than or equal to the material flow C, maintaining the rotating speed of the spiral conveyor; if the material flow C is less than or equal to 0.95 multiplied by the material flow D, the control device controls and reduces the forward rotating speed V' of the spiral motor of the spiral conveyor;
(3.3) the step (3.2) further comprises the step of increasing the forward rotating speed of the spiral motor in a stepping mode, wherein the rotating speed of each increment is delta V' = 0.05V1I.e. V' = V1+ N x Δ V', where N is the number of adjustments and the time interval between two adjacent adjustments is T0After N times of adjustment, if the material flow D is more than 0.95 and less than or equal to the material flow C and less than or equal to the material flow D, maintaining the rotating speed of the spiral conveyor, wherein the step (3.2) further comprises the step of reducing the forward rotating speed of the spiral motor in a stepping manner, and the rotating speed reduced each time is delta V' = 0.05V1I.e. V' = V1-N x Δ V', where N is the number of adjustments and the time interval between two consecutive adjustments is T0And after N times of adjustment, if the material flow D is more than 0.95 and less than or equal to the material flow C, maintaining the rotating speed of the screw conveyor.
The invention has the advantages that:
1. according to the invention, the mode that the pipe belt conveyor and the screw conveyor are combined with each other is adopted, and particularly, the screw rod of the screw conveyor is arranged in the lifting section of the pipe belt conveyor, namely the inner part of the middle section part to convey or slow down materials, so that the technical problems that the pipe belt conveyor cannot carry out lifting conveying and backfilling conveying in a large-angle direction, and sediment materials with high flowability are prevented from being accumulated on the lifting section of the Z-shaped pipe belt conveyor are solved.
2. Through setting up low section flow detector and high section flow detector, its size through the front and back detection material stream flow effectively realizes whether the silt material piles up to realize through control screw conveyer's positive and negative commentaries on classics that the silt material promotes or slows down, realize promoting to carry and backfill two kinds of operation modes.
3. The front end and the rear end of the pipe belt conveyor are arranged to be capable of lifting and horizontally moving, and the middle section is arranged to be adjustable in inclination angle, so that conveying at different inclination angles and different heights is achieved, and the application range of the pipe belt conveyor is greatly expanded.
Drawings
FIG. 1-three dimensional view of the invention;
FIG. 2-top view of the present invention;
FIG. 3-side view of the invention;
fig. 4-a cross-sectional view in fig. 2.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
A control method of a mixed conveying device for civil engineering comprises the mixed conveying device for civil engineering, wherein the mixed conveying device comprises a pipe belt conveyor 1, a spiral conveyor 2, a flow detection device and a control device, wherein the pipe belt conveyor 1 comprises a low section part 11, a middle section part 12, a high section part 13, a conveying belt 14 and a two-way motor, and the low section part 11, the middle section part 12 and the high section part 13 sequentially form a Z shape; screw conveyer 2 includes screw motor, hob 21 and round cage frame, round cage frame includes three mobile poles and many rings, the hob sets up inside round cage frame, round cage frame is used for keeping apart helical blade and the conveyer belt of hob 21, avoid the conveyer belt to be cut apart, screw conveyer 2 is installed at middle section part 12, screw conveyer 2's hob 21 sets up the inside at middle section part 12, screw motor is used for driving screw 21's rotation, screw motor installs the high-end one side at middle section part 12, the conveyer belt 14 that middle section part 12 was passed to hob 21 one end extends to the adjacency department of low-end part 11 and middle section part 12, the conveyer belt 14 that middle section part 12 was worn out to the other end of hob 21 links to each other with screw motor.
The middle section part 12 comprises a middle section frame 121, an upper pulley 122, a lower pulley 123, a first electric telescopic rod 124, a second electric telescopic rod 125 and a fixed support 126, wherein the upper pulley is installed at the upper end of the middle section frame, the lower pulley is installed at the lower end of the middle section frame, the telescopic end of the first electric telescopic rod is hinged at the upper end of the middle section frame, and the hinged telescopic end of the second electric telescopic rod is hinged at the lower end of the middle section frame; the upper pulley and the lower pulley are respectively supported in the groove of the fixed support in a rolling mode, and therefore the angle of the middle section part in the vertical direction is adjusted through the extension and retraction of the first electric telescopic rod and the second electric telescopic rod, and the conveying inclination angle is adjusted accordingly.
The flow detection device comprises a low-section flow detector 15 and a high-section flow detector 16, wherein the low-section flow detector is mounted at the rear side of the feeding port of the low-section part 11 and is used for detecting the flow of materials fed from the feeding port of the low-section part 11 in the material lifting process or the flow of materials conveyed from the middle-section part in the backfilling conveying process; the high-section flow detector is arranged at the front end of the high-section part 12 and is arranged close to the middle-section part 12 and used for detecting the material flow in the material lifting process or the material flow input from the high-section part 13 in the backfilling conveying process.
The control device is respectively connected with the two-way motor of the pipe belt conveyor 1, the screw motor of the screw conveyor 2, the low-section flow detector and the high-section flow detector of the flow detection device, the first electric telescopic rod, the second electric telescopic rod, the low-section walking driving device and the high-section walking driving device in an electric control mode, wherein the control device is used for respectively receiving flow signals of the low-section flow detector and the high-section flow detector and controlling the forward/reverse rotation and the rotating speed of the two-way motor and the screw motor according to the flow signals; the low-section walking driving device and the high-section walking driving device can be matched with each other to adjust the conveying angle and the front and back conveying positions, so that multi-direction and multi-angle conveying is realized.
The pipe belt conveyor, which uses the supporting rollers for supporting and conveying in the axial direction, belongs to the prior art, and is not specifically described and limited herein.
The working principle of the invention is as follows:
in the sediment material lifting stage:
the excavated sediment material enters through a feeding port of the low-section part 11, further passes through the middle-section part 12 and enters the high-section part 13, so that the lifting and conveying of the sediment material can be completed; and because of the fluidity and gravity action of silt, silt supplies will pile up in the low section part 11 and the middle section part 12 adjacent place, when there is no other apparatus to act, silt supplies will leak out of the conveyor belt, and then cause the failure that silt supplies promote the transport, but in order to avoid the above-mentioned problem, the invention further provides screw conveyor 2 and controlling device and flow detector, the low section flow detector is used for detecting the material flow A of input from the low section part 11, the high section flow monitor is used for detecting the material flow B of the middle section part 12 output, while beginning to promote the transport, when the low section flow detector detects the material flow A, begin timing, at this moment start screw conveyor 2, screw conveyor 2 can promote the silt supplies that pile up in the low section part 11 and middle section part 12 adjacent place, avoid the pile up of silt supplies, and then influence and promote the transport, the high-section flow detector is used for detecting the material flow B output from the middle section part 12, and transmits signals of the material flow A and the material flow B to the control device for judgment and control, if the material flow A is larger than the material flow B, the sediment material is shown to be accumulated, the control device further increases the rotating speed of the screw conveyor 2, the conveying speed of the screw conveyor 2 is improved, further accumulation of the sediment material at the adjacent position is avoided, if the material flow A is not larger than the material flow B, the rotating speed of the screw conveyor 2 is kept, therefore, accumulation of the sediment-free material can be kept, safety is guaranteed, speed limit control is further arranged, and when the speed limit range is exceeded, the staff carries out processing.
In the backfill stage of the silt materials:
the silt material to be backfilled enters through a feeding hole of the high-section part 13 and further enters the low-section part 11 through the middle-section part 12, so that the backfilling and conveying of the silt material can be completed; and because of the fluidity and gravity action of silt, and the conveyer belt is further conveyed from high to low, further aggravate the accumulation of silt material in the low section part 11 and the adjacent place of the middle section part 12, when there is no other apparatus to act, the silt material will leak out of the conveyer belt, and then cause the failure of the silt material to backfill and convey, and in order to avoid the above-mentioned problem, the invention further has spiral conveyers 2 and controlling devices and flow detectors, the low section flow detector is used for detecting the material flow C of the output from the low section part 11, the high section flow detector is used for detecting the material flow D of the input of the middle section part 12, when beginning to backfill and convey, when the high section flow detector detects the material flow D, begin timing, at this moment start the spiral conveyer 2 to rotate clockwise slowly, the conveying direction of the spiral conveyer is opposite to the conveying direction of the pipe belt conveyer, from this through the reversal of screw conveyer 2 and forward defeated material promptly, reduce the accumulation of silt material in low section part 11 and middle section part 12 junction, and give controlling means with material flow C and material flow D's signal transmission and judge control, if material flow C > material flow D, show that silt material exists accumulational condition, also be exactly the material is piled up in the below, the silt material that the conveyer belt carried over when carrying is more, controlling means further increases screw conveyer 2's forward rotational speed, improve screw conveyer 2's forward conveying speed, thereby reduce silt material whereabouts volume, and then avoid the accumulation of silt material in junction, if material flow C is less than or equal to material flow D, keep screw conveyer 2's rotational speed.
When lifting and conveying, the material signals detected by the low-section flow detector and the high-section flow detector are respectively material flow A and material flow B; when backfilling is carried, the material signals detected by the low-section flow detector and the high-section flow detector are respectively material flow C and material flow D.
Further, in order to realize the lifting and backfill conveying, the specific control method comprises the following steps:
the control method comprises the following steps:
(1) and (3) controlling the low section part, the middle section part and the high section part to adjust the conveying angle by the control device, selecting a conveying mode after the conveying angle is adjusted, wherein the conveying mode comprises lifting conveying and backfilling conveying, and entering the step (2) if the conveying mode is lifting conveying, and entering the step (3) if the conveying mode is backfilling conveying.
(2) The lifting conveying comprises the following steps:
(2.1) starting the forward running low-section flow detector of the pipe belt conveyorThe control device is used for detecting the material flow A input to the low-section part, and after acquiring an electric signal of the material flow A of the low-section flow detector, the control device starts the screw conveyor to operate in the forward direction to control the screw motor and rotate at an initial rotating speed V0Running and starting to time, and after the set initial time T passes0And then, the high-section flow detector is used for detecting the material flow B output from the middle section part, and the control device acquires a signal of the material flow B.
(2.2) comparing the material flow A with the material flow B by the control device, if the material flow A is larger than the material flow B, indicating that the sediment materials are accumulated, and controlling to increase the rotating speed V of a spiral motor of the spiral conveyor by the control device; and if the material flow A is less than or equal to the material flow B, maintaining the rotating speed of the screw conveyor.
(2.3) the step (2.2) further comprises increasing the rotation speed of the screw motor in steps, wherein the rotation speed of each increment is delta V = 0.05V0I.e. V = V0+ n x Δ V, where n is the number of adjustments and the time interval between two adjacent adjustments is T0And after n times of adjustment, if the material flow A is less than or equal to the material flow B, maintaining the rotating speed of the screw conveyor.
(2.4) in the step (2.2), speed-limiting control is further provided, and the adjusting range of the rotating speed V of the spiral motor is as follows: v0≤V≤2 V0And alarming when the alarm exceeds the range, and processing by workers.
(3) The backfill conveying comprises the following steps:
(3.1) starting the reverse operation of the pipe belt conveyor, wherein the high-section flow detector is used for detecting the material flow D input to the high-section part, and after the control device acquires the electric signal of the material flow D of the high-section flow detector, the spiral conveyor is started in the forward direction to control the spiral motor and the initial rotating speed is V1The positive speed of the sediment is used for slowing down the downward conveying of the sediment materials in the middle section part, and the timing is started, and the sediment materials are conveyed for a set initial time T0And then, the low-stage flow detector is used for detecting the material flow C output from the low-stage part, and the control device acquires a signal of the material flow C.
(3.2) comparing the material flow C with the material flow D by the control device, if the material flow C is larger than the material flow D, indicating that silt materials are accumulated, and controlling and increasing the forward rotating speed V' of a spiral motor of the spiral conveyor by the control device; if the material flow D is more than 0.95 and less than or equal to the material flow C, maintaining the rotating speed of the spiral conveyor; if the material flow C is less than or equal to 0.95 multiplied by the material flow D, the control device controls to reduce the forward rotating speed V' of the spiral motor of the spiral conveyor.
(3.3) the step (3.2) further comprises the step of increasing the forward rotating speed of the spiral motor in a stepping mode, wherein the rotating speed of each increment is delta V' = 0.05V1I.e. V' = V1+ N x Δ V', where N is the number of adjustments and the time interval between two adjacent adjustments is T0After N times of adjustment, if the material flow D is more than 0.95 and less than or equal to the material flow C and less than or equal to the material flow D, maintaining the rotating speed of the spiral conveyor, wherein the step (3.2) further comprises the step of reducing the forward rotating speed of the spiral motor in a stepping manner, and the rotating speed reduced each time is delta V' = 0.05V1I.e. V' = V1-N x Δ V', where N is the number of adjustments and the time interval between two adjacent adjustments is T0After N times of adjustment, if the material flow D is more than 0.95 and less than the material flow C and less than or equal to the material flow D, the rotating speed of the screw conveyor is kept, wherein V' can be a negative value.
Further, the forward rotation speed V1Not greater than initial speed V0One fourth of (a); t is0For the time of predetermineeing, for the time that silt material transmits high section flow detector from low section flow detector needs, it can carry out corresponding setting according to actual transmission condition, and the technical staff in the art can carry out corresponding calculation or setting according to prior art, and it is no longer repeated here.
Further, in step (3.3), the forward rotation speed of the screw motor is reduced in a stepping mode, and the rotation speed in each time of reduction is delta V' = 0.05V1I.e. V' = V1-nxΔ V', wherein the negative value is obtained, that is, the screw motor rotates in a reverse direction, so as to prevent silt from the high section part from accumulating in the high section part and the middle section part or in the screw conveyor, and to perform a cleaning function; in addition, the screw conveyer 2 can be started and operated independently and can be used for forward and reverseAnd the device further plays a role in cleaning internal materials when running.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (1)
1. A control method of a mixed conveying device for civil engineering comprises the mixed conveying device for civil engineering, wherein the mixed conveying device comprises a pipe belt conveyor, a spiral conveyor, a flow detection device and a control device, the pipe belt conveyor comprises a low section part, a middle section part, a high section part, a conveying belt and a bidirectional motor, and the low section part, the middle section part and the high section part sequentially form a Z shape; the spiral conveyor is arranged in the middle section of the pipe belt conveyor in a penetrating mode, the flow detection device comprises a low-section flow detector and a high-section flow detector, and the low-section flow detector is installed on the rear side of a feeding opening of the low-section part; the high-section flow detector is arranged at the front end of the high-section part and is arranged close to the middle-section part;
the method is characterized in that:
the control method comprises the following steps:
(1) the control device controls the low section part, the middle section part and the high section part to adjust the conveying angle, after the conveying angle is adjusted, a conveying mode is selected, the conveying mode comprises lifting conveying and backfilling conveying, if the conveying mode is lifting conveying, the step (2) is carried out, and if the conveying mode is backfilling conveying, the step (3) is carried out;
(2) the lifting conveying comprises the following steps:
(2.1) starting the forward operation of the pipe belt conveyor, wherein the low-section flow detector is used for detecting the material flow A input to the low-section part, and the control device acquires the low-section flow detectorAfter the electric signal of the material flow A, the screw conveyor is started to operate in the forward direction, and the screw motor is controlled to rotate at the initial rotating speed V0Running and starting timing, after the set initial time T0Then, the high-section flow detector is used for detecting the material flow B output from the middle section part, and the control device acquires a signal of the material flow B;
(2.2) comparing the material flow A with the material flow B by the control device, if the material flow A is larger than the material flow B, indicating that the sediment materials are accumulated, and controlling to increase the rotating speed V of a spiral motor of the spiral conveyor by the control device; if the material flow A is less than or equal to the material flow B, maintaining the rotating speed of the spiral conveyor;
(2.3) the step (2.2) further comprises increasing the rotation speed of the screw motor in steps, wherein the rotation speed of each increment is delta V = 0.05V0I.e. V = V0+ n x Δ V, where n is the number of adjustments and the time interval between two adjacent adjustments is T0After n times of adjustment, if the material flow A is less than or equal to the material flow B, the rotating speed of the spiral conveyor is kept;
(2.4) in the step (2.2), speed-limiting control is further provided, and the adjusting range of the rotating speed V of the spiral motor is as follows: v0≤V≤2 V0Alarming when the alarm is out of range, and processing by staff;
(3) the backfill conveying comprises the following steps:
(3.1) starting the reverse operation of the pipe belt conveyor, wherein the high-section flow detector is used for detecting the material flow D input to the high-section part, and after the control device acquires the electric signal of the material flow D of the high-section flow detector, the spiral conveyor is started in the forward direction to control the spiral motor and the initial rotating speed is V1The positive speed of the sediment is used for slowing down the downward conveying of the sediment materials in the middle section part, and the timing is started, and the sediment materials are conveyed for a set initial time T0Then, the low-stage flow detector is used for detecting the material flow C output from the low-stage part, and the control device acquires a signal of the material flow C;
(3.2) comparing the material flow C with the material flow D by the control device, if the material flow C is larger than the material flow D, indicating that silt materials are accumulated, and controlling and increasing the forward rotating speed V' of a spiral motor of the spiral conveyor by the control device; if the material flow D is more than 0.95 and the material flow C is less than or equal to the material flow D, the rotating speed of the screw conveyor is kept; if the material flow C is less than or equal to 0.95 multiplied by the material flow D, the control device controls and reduces the forward rotating speed V' of the spiral motor of the spiral conveyor;
(3.3) the step (3.2) further comprises increasing the forward rotating speed of the spiral motor in a stepping mode, wherein the rotating speed of each increment is delta V' = 0.05V1I.e. V' = V1+ N x Δ V', where N is the number of adjustments and the time interval between two adjacent adjustments is T0After N times of adjustment, if the material flow D is more than 0.95 and less than or equal to the material flow C and less than or equal to the material flow D, maintaining the rotating speed of the spiral conveyor, wherein the step (3.2) further comprises the step of reducing the forward rotating speed of the spiral motor in a stepping manner, and the rotating speed reduced each time is delta V' = 0.05V1I.e. V' = V1-N x Δ V', where N is the number of adjustments and the time interval between two consecutive adjustments is T0And after N times of adjustment, if the material flow D is more than 0.95 and less than or equal to the material flow C, maintaining the rotating speed of the screw conveyor.
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