CN114800860B - Control method of stirring device, stirring device and pumping equipment - Google Patents
Control method of stirring device, stirring device and pumping equipment Download PDFInfo
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- CN114800860B CN114800860B CN202110129012.4A CN202110129012A CN114800860B CN 114800860 B CN114800860 B CN 114800860B CN 202110129012 A CN202110129012 A CN 202110129012A CN 114800860 B CN114800860 B CN 114800860B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides a control method of a stirring device, the stirring device and pumping equipment. The stirring device comprises a hopper, a first conveying cylinder, a second conveying cylinder, a swinging elbow pipe, a conveying pipe and stirring blades, wherein the first conveying cylinder and the second conveying cylinder, the swinging elbow pipe, the conveying pipe and the stirring blades are respectively communicated with the hopper; the control method comprises the following steps: the stirring blades are controlled to run at different average rotating speeds in a static period and a swinging period, and the average rotating speed of the stirring blades in the static period is larger than that of the stirring blades in the swinging period of the swinging elbow pipe. The invention can improve the material sucking performance of the first conveying cylinder and the second conveying cylinder.
Description
Technical Field
The invention relates to the technical field of pumping equipment, in particular to a control method of a stirring device, the stirring device and the pumping equipment.
Background
When pumping materials such as concrete pumps using pumping equipment, the materials need to be stirred and conveyed by a stirring device including a hopper, stirring blades, and a conveying cylinder.
One of the disadvantages in the related art is that the suction performance of the delivery cylinder is not ideal.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems.
To this end, a first aspect of the invention provides a method of controlling a stirring device.
A second aspect of the invention provides a stirring device.
A third aspect of the invention provides a pumping apparatus.
In order to achieve the first aspect of the present invention, an embodiment of the present invention provides a control method of a stirring apparatus including a hopper, first and second conveying cylinders respectively communicating with the hopper, a swing elbow pipe provided in the hopper and including first and second open ends, a conveying pipe communicating with the first open end, a stirring blade provided in the hopper, the swing elbow pipe including a rest period and a swing period in an operation state of the stirring apparatus, the first or second conveying cylinder communicating with the conveying pipe through the swing elbow pipe, the swing period being for switching communication between the second open end and the first or second conveying cylinder; the control method comprises the following steps: the stirring blades are controlled to operate at different average rotating speeds in the stationary phase and the swinging phase, and the average rotating speed of the stirring blades in the stationary phase is larger than that of the stirring blades in the swinging phase.
The rotation speed change of the stirring blade can be reasonably controlled, so that the rotation speed of the stirring blade changes in real time according to the conveying condition of the first conveying cylinder and the second conveying cylinder and the swinging state of the swinging elbow pipe, and the material sucking performance of the stirring device is improved.
In addition, the technical scheme of the invention can also have the following additional technical characteristics:
in the above technical solution, the swing period includes a first swing period and a second swing period after the first swing period, the rotation speed of the stirring blade is gradually reduced in the first swing period, and the rotation speed of the stirring blade is kept constant in the second swing period.
The speed control mode enables the rotation speed of the stirring blade and the swinging state of the swinging elbow pipe to be mutually matched, so that the material sucking performance of the stirring device is further improved.
In the first swing period, the rotation speed of the stirring blade is controlled by the following formula: n= (1+k) ×n 0 +K×n 0 ×cos[(π×t)/t 1 ]The method comprises the steps of carrying out a first treatment on the surface of the In the second swing period, the rotation speed of the stirring blade is controlled by the following formula: n=n 0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is the real-time rotation speed of the stirring blade, n 0 For the set rotation speed of the stirring blade, t is stirringThe real-time of the blade in the set period, t 1 K is a positive number for the duration of the first wobble period.
The real-time rotation speed of the stirring blade gradually changes along with time. In the first swing period, the real-time rotation speed of the stirring blade gradually decreases from high to low, and in the second swing period, the real-time rotation speed of the stirring blade is kept constant. Therefore, the stirring blade can be decelerated in the early swing stage of the swing elbow pipe and is constant in the later swing stage of the swing elbow pipe.
In any of the above-described aspects, the stationary phase includes a first stationary phase in which the rotational speed of the stirring blade gradually increases and a second stationary phase after the first stationary phase in which the rotational speed of the stirring blade is kept constant.
The speed control mode enables the rotation speed of the stirring blade and the static state of the swinging elbow pipe to be mutually matched, so that the material sucking performance of the stirring device is further improved.
In any of the above solutions, in the first stationary phase, the rotational speed of the stirring blade is controlled by the following formula: n= (1+k) ×n 0 +K×n 0 ×cos{[π×(t-t 1 -t 2 -t 3 )/t 3 ]-a }; in the second stationary phase, the rotational speed of the stirring blade is controlled by the following formula: n= (1+2k) ×n 0 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is the real-time rotation speed of the stirring blade, n 0 For the set rotation speed of the stirring blade, t is the real-time of the stirring blade in the set period, the swing period comprises a first swing period and a second swing period after the first swing period, and t 1 For the duration of the first swing period, t 2 For the duration of the second swing period, t 3 For the duration of the first rest period, K is a positive number.
The real-time rotation speed of the stirring blade gradually changes along with time. In the first stationary phase, the real-time rotation speed of the stirring blade is represented by n 0 Gradually rising, and in the second stationary phase, the real-time rotation speed of the stirring blade is kept constant. Therefore, the stirring blade can be accelerated in the early stationary stage of the swing elbow pipe and can be kept at a constant speed in the later stationary stage of the swing elbow pipe.
To achieve the second aspect of the present invention, an embodiment of the present invention provides a stirring device including: a hopper for holding a material; the first conveying cylinder is communicated with the hopper and is used for sucking or pumping materials from the hopper; the second conveying cylinder is communicated with the hopper and is used for sucking or pumping materials from the hopper; the swing elbow is arranged in the hopper and comprises a first opening end and a second opening end which are oppositely arranged, and the swing elbow is used for switching the communication between the second opening end and the first conveying cylinder or the second conveying cylinder in the swing period; a conveying pipe communicated with the second opening end and used for conveying materials from the first conveying cylinder or the second conveying cylinder out of the hopper; the stirring blade is arranged in the hopper and is used for stirring materials; and the controller is used for controlling the swinging elbow pipe to swing and controlling the average rotating speed of the stirring blade in the static period of the swinging elbow pipe to be larger than the average rotating speed of the stirring blade in the swinging period of the swinging elbow pipe.
The stirring device of the embodiment controls the average rotating speed of the stirring blade in the stationary period of the swinging elbow pipe to be larger than the average rotating speed of the stirring blade in the swinging period of the swinging elbow pipe, namely, the control method of the stirring device of any embodiment of the invention is adopted to control the stirring blade to rotate and control the swinging elbow pipe to swing, so that the stirring device has all the beneficial effects of the control method of the stirring device of any embodiment of the invention.
In addition, the technical scheme of the invention can also have the following additional technical characteristics:
in the above technical scheme, stirring vane includes: the first stirring blade is arranged in the hopper and is close to one side of the first conveying cylinder; the second stirring blade is arranged in the hopper and is close to one side of the second conveying cylinder; the stirring device further comprises a first driving device and a second driving device which are independently controlled, wherein the first driving device is connected with the first stirring blade and is used for driving the first stirring blade to rotate, and the second driving device is connected with the second stirring blade and is used for driving the second stirring blade to rotate.
The present embodiment may adopt the control method of the stirring device according to any one of the embodiments of the present invention to control the rotation speed of the first stirring blade and the rotation speed of the second stirring blade, respectively.
In any of the above technical solutions, in a stationary state in which the swing elbow is communicated with the first conveying cylinder, controlling the average rotation speed of the second stirring blade to be greater than the average rotation speed of the second stirring blade in the swing period of the swing elbow; and in a static state that the swing elbow is communicated with the second conveying cylinder, controlling the average rotating speed of the first stirring blade to be larger than that of the first stirring blade in the swing period of the swing elbow.
In any of the above solutions, the first driving device includes a first motor, a first speed reducer and a first transmission disposed above the first motor; the second driving device comprises a second motor, a second speed reducer and a second speed changer, wherein the second speed reducer and the second speed changer are arranged on the first motor; the first speed changer is used for adjusting the rotation speed of the first stirring blade, and the second speed changer is used for adjusting the rotation speed of the second stirring blade.
The motive power provided by the first motor is transmitted to the first transmission after being decelerated by the first decelerator, and the first transmission outputs a certain regular rotating speed to the first stirring blade through the control method of the stirring device according to any embodiment of the invention, and the rotating speed of the first stirring blade is controlled to rotate. The motive power provided by the second motor is transmitted to the second speed changer after being decelerated by the second speed reducer, and the second speed changer outputs a certain regular rotating speed to the second stirring blade through the control method of the stirring device according to any embodiment of the invention, and the rotating speed of the second stirring blade is controlled to rotate.
To achieve the third aspect of the present invention, an embodiment of the present invention provides a pumping apparatus comprising: a pumping assembly; the stirring device according to any one of the aspects of the present invention, wherein the stirring device is adapted to supply material to the pumping assembly.
The pumping device of this embodiment comprises a stirring device according to any of the embodiments of the invention, and thus has all the advantages of a stirring device according to any of the embodiments of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a stirring device in the related art;
FIG. 2 is a schematic structural view of a stirring device according to an embodiment of the present invention;
FIG. 3 is a second schematic view of a stirring device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the constitution of a pumping apparatus of a stirring device according to an embodiment of the present invention;
FIG. 5 is a flow chart showing the steps of a method for controlling a stirring device according to an embodiment of the present invention;
fig. 6 is a graph showing a change in rotational speed of the stirring blade in a set period according to an embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 is:
100': stirring device, 160': stirring vane.
The correspondence between the reference numerals and the component names in fig. 2 to 4 is:
100: stirring device, 110: hopper, 120: first delivery cylinder, 130: second transfer cylinder, 140: swing elbow, 142: first open end, 144: second open end, 150: delivery tube, 160: stirring vane, 162: first stirring vane, 164: second stirring vane, 170: first drive means, 172: first motor, 174: first decelerator, 176: first transmission, 180: second drive means, 182: second motor, 184: second decelerator, 186: second transmission, 200: pumping device, 300: and a pumping assembly.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A control method of the stirring device, the stirring device 100, and the pumping apparatus 200 according to some embodiments of the present invention are described below with reference to fig. 2 to 6.
As shown in fig. 1, in the concrete pumping process, the hopper is filled with concrete, and the stirring blade 160' of the stirring device 100' is disposed in the hopper, and the main function is to stir the concrete in the hopper by using the rotation of the stirring blade 160', so as to prevent the segregation, agglomeration, and other phenomena of the concrete. The stirring system in the related art adopts an integral stirring shaft, namely a stirring shaft, which is connected with two pairs of stirring blades 160', and the stirring blades 160' do synchronous motion, namely: the rotation speeds of the two pairs of stirring blades 160' are identical, so that they cannot be adjusted by the actual state of the concrete in the hopper. In addition, there is a scheme of adopting a split stirring shaft in the related art, that is, two groups of stirring blades 160 'are independently controlled by two stirring shafts, and the rotation speeds of the left and right stirring blades 160' can be respectively controlled by stirring motors on the left and right sides, but the ideal speed adjustment of the stirring system still cannot be realized. For this reason, the embodiment of the present invention provides the following control method of the stirring device, the stirring device 100 and the pumping apparatus 200, so as to achieve the purpose of reasonably adjusting the rotation speed of the stirring blade 160 and improving the suction performance of the conveying cylinder in the stirring device.
Example 1:
as shown in fig. 5, the present embodiment provides a control method of the stirring device 100. As shown in fig. 2 and 3, the stirring device 100 includes a hopper 110, first and second conveying cylinders 120 and 130 respectively communicating with the hopper 110, a swing elbow 140 provided in the hopper 110 and including first and second open ends 142 and 144, a conveying pipe 150 communicating with the first open end 142, and stirring blades 160 provided in the hopper 110, and in an operating state of the stirring device 100, the swing elbow 140 includes a rest period in which the first or second conveying cylinder 120 or 130 communicates with the conveying pipe 150 through the swing elbow 140, and a swing period for switching communication between the second open end 144 and the first or second conveying cylinder 120 or 130. The control method comprises the following steps:
in step S102, the stirring blade is controlled to operate at different average rotational speeds in the stationary phase and the swinging phase, and the average rotational speed of the stirring blade in the stationary phase is greater than the average rotational speed of the stirring blade in the swinging phase.
The stirring device 100 of the present embodiment is used for a pumping apparatus 200 such as a concrete pump truck, and when the stirring device 100 is in use, an operator pours a material such as concrete into a hopper 110, and stirring blades 160 provided in the hopper 110 stir the material. A first conveying cylinder 120 and a second conveying cylinder 130 are provided in parallel in pairs on either side wall of the hopper 110. The first and second transfer cylinders 120, 130 are capable of drawing material from the hopper 110, respectively. Also provided in the hopper 110 is a swing elbow 140, the swing elbow 140 having an S-shaped curved shape, one end of which, in turn, the side wall of the hopper 110 extends out of the hopper 110 and communicates with the delivery tube 150. The other end is a free end. The swinging elbow 140 includes a first opening end 142 and a second opening end 144 that are disposed opposite to each other, and since the swinging elbow 140 has an S-shaped curved shape, the swinging elbow 140 swings in a reciprocating rotation manner with a circular shape as a trajectory when swinging around the central axis of the first opening end 142. Wherein the second open end 144, when swung into a position of interfacing with the first transfer cylinder 120, the first transfer cylinder 120 feeds material drawn from the hopper 110 through the swing elbow 140 into the transfer tube 150. The second open end 144, when swung into a position of interfacing with the second transfer cylinder 130, the second transfer cylinder 130 feeds material drawn from the hopper 110 through the swing elbow 140 into the transfer tube 150.
During operation of the stirring apparatus 100, the swing elbow 140 swings at certain periods and the stirring blade 160 needs to rotate to stir the material. During pumping, the pumping apparatus 200 agitates the material within the hopper 110 by the dual action of the swing elbow 140 and the stirring blade 160. In one cycle of the swing pipe 140, the flow conditions of the materials in the hopper 110 at different moments are obviously different, and in particular, the swing pipe 140 can drive the materials to flow during the swing process. In the actual material sucking process of the related art, the swing elbow 140 is stationary, and only the stirring blade 160 rotates, the above control manner cannot effectively improve the material sucking efficiency. For this reason, the present embodiment matches the rotation speed variation cycle of the stirring blade 160 and the pumping suction cycle of the swing elbow 140 in the feeding and suction process of the stirring apparatus 100, so that the rotation speed variation cycle of the stirring blade 160 is equal to the pumping suction cycle of the swing elbow 140. Thus, the present embodiment can reasonably control the rotation speed variation of the stirring blade 160, so that the rotation speed of the stirring blade 160 varies in real time according to the conveyance condition with the first and second conveying cylinders 120 and 130 and the swing state of the swing elbow pipe 140, and thus the suction performance of the stirring apparatus 100 is improved.
Example 2:
the embodiment provides a control method of a stirring device. In addition to the technical features of the above-described embodiments, the present embodiment further includes the following technical features.
The swing period includes a first swing period in which the rotation speed of the stirring blade 160 is gradually reduced and a second swing period after the first swing period in which the rotation speed of the stirring blade 160 is kept constant.
The present embodiment divides the setting period of embodiment 1 into a swing period and a stationary period during the operation of the stirring apparatus 100. Wherein the swing elbow 140 swings during the swing period and is stationary during the stationary period. The present embodiment sets the rotational speed of the stirring vane 160 in the swing period to be relatively low, and sets the rotational speed of the stirring vane 160 in the stationary period to be relatively high.
Thus, the present embodiment can save energy consumption in pumping and sucking, and can improve the flow performance of the material in the hopper 110 during the stationary period.
Specifically, the total duration of the period is set to be T, wherein the stirring device 100 first enters the swing period from the time 0 and then enters the stationary period.
Wherein the swing period comprises a first swing period and a second swing period, and the duration of the first swing period is t 1 The second swing period starts after the first swing period and has a duration of t 2 . The rest period starts after the second wobble period.
The rest period includes a first rest period and a second rest period after the rest period. Wherein the duration of the first stationary phase is t 3 The duration of the second stationary phase is t 4 . The total duration T of the set period is equal to T 1 +t 12 +t 3 +t 4 。
As shown in FIG. 6, the present embodiment is between 0 and t 1 The rotation speed of the stirring blade 160 is controlled to gradually decrease in the first swing period of the ending time range, and at t 1 End to t 2 The holding of the stirring vane 160 is controlled to be constant during the second oscillation period of the ending time range. The first swing period is a swing earlier period, and the second swing period is a swing later period.
The above-mentioned speed control manner enables the rotation speed of the stirring blade 160 and the swinging state of the swinging elbow pipe 140 to be mutually adapted so as to further improve the material sucking performance of the stirring apparatus 100.
Example 3:
the present embodiment provides a control method of the stirring device 100. In addition to the technical features of the above-described embodiments, the present embodiment further includes the following technical features.
In the first swing period, the rotation speed of the stirring blade 160 is controlled by the following formula: n= (1+k) ×n 0 +K×n 0 ×cos[(π×t)/t 1 ]The method comprises the steps of carrying out a first treatment on the surface of the In the second swing period, the rotation speed of the stirring blade 160 is controlled by the following formula: n=n 0 The method comprises the steps of carrying out a first treatment on the surface of the Where n is the real-time rotational speed of the stirring blade 160, n 0 For the set rotational speed of the stirring blade 160, t is the real-time the stirring blade 160 is in the set period, t 1 For the duration of the swing period of the first swing elbow, K is a positive number, such as 0.3, 0.5, 0.8, 1, 2.
The set rotation speed in the embodiment can be selected by a person skilled in the art according to actual needsSelecting and adjusting. The real-time rotational speed of the stirring vane 160 gradually varies with time. In the first swing period, the real-time rotation speed of the stirring blade 160 is set to be (1+2K). Times.n 0 Gradually decrease to n 0 In the second swing period, the real-time rotation speed of the stirring blade 160 is n 0 Where it remains constant. Thus, the present embodiment can make the stirring vane 160 slow down in the early stage of swing of the swing elbow 140 and constant speed in the late stage of swing of the swing elbow 140.
Example 4:
the embodiment provides a control method of a stirring device. In addition to the technical features of the above-described embodiments, the present embodiment further includes the following technical features.
The stationary period includes a first stationary period in which the rotational speed of the stirring blade 160 is gradually increased and a second stationary period after the first stationary period in which the rotational speed of the stirring blade 160 is kept constant.
As shown in fig. 6, the present embodiment is at t 2 End to t 3 The rotational speed of the stirring vane 160 is controlled to gradually rise during the first stationary period of the ending and at t 3 End to t 3 The stirring vane 160 is controlled to remain constant during the second stationary phase of the end stop. The first resting period is a resting front period, and the second resting period is a resting rear period.
The above-mentioned speed control manner enables the rotation speed of the stirring blade 160 and the stationary state of the swing elbow 140 to be mutually adapted so as to further improve the suction performance of the stirring apparatus 100.
Example 5:
the present embodiment provides a control method of the stirring device 100. In addition to the technical features of the above-described embodiments, the present embodiment further includes the following technical features.
In the first swing elbow rest period, the rotational speed of the stirring blade 160 is controlled by the following formula: n= (1+k) ×n 0 +K×n 0 ×cos{[π×(t-t 1 -t 2 -t 3 )/t 3 ]-a }; in the stationary phase of the second swing elbow, the rotational speed of the stirring blade (160) is controlled by the following formula: n= (1 +)2K)×n 0 The method comprises the steps of carrying out a first treatment on the surface of the Where n is the real-time rotational speed of the stirring blade 160, n 0 For the set rotational speed of the stirring blade 160, t is the real time in which the stirring blade 160 is located in the set period, the swing period of the swing elbow includes a first swing period of the swing elbow and a second swing period of the swing elbow after the first swing period of the swing elbow, t 1 T is the duration of the swing period of the first swing bent pipe 2 Is the duration of the swing period of the second swing bent pipe, t 3 For the duration of the rest period of the first swing elbow, K is a positive number, such as 0.3, 0.5, 0.8, 1, 2, and in the embodiment 0.5 is selected.
The set rotational speed in this embodiment can be selected and adjusted by those skilled in the art according to actual needs. The real-time rotational speed of the stirring vane 160 gradually varies with time. In the first stationary phase, the real-time rotational speed of the stirring vane 160 is defined by n 0 Gradually rise to (1+2K). Times.n 0 In the second stationary phase, the real-time rotation speed of the stirring blade 160 is (1+2K). Times.n 0 Where it remains constant. Thus, the present embodiment can make the stirring vane 160 rise in the early stationary phase of the swing elbow 140 and constant in the late stationary phase of the swing elbow 140.
Example 6:
as shown in fig. 2 and 3, the present embodiment provides a stirring device 100 including: a hopper 110, the hopper 110 for holding materials; a first transfer cylinder 120, the first transfer cylinder 120 being in communication with the hopper 110 for sucking or pumping material from the hopper 110; a second transfer cylinder 130, the second transfer cylinder 130 being in communication with the hopper 110 for sucking or pumping material from the hopper 110; a swing elbow 140, the swing elbow 140 being disposed in the hopper 110 and comprising a first open end 142 and a second open end 144 disposed opposite each other, the swing elbow 140 being configured to switch communication between the second open end 144 and the first delivery cylinder 120 or the second delivery cylinder 130 during a swing period; a transfer tube 150, the transfer tube 150 being in communication with the second open end 144 for delivering material from the first transfer cylinder 120 or the second transfer cylinder 130 out of the hopper 110; a stirring blade 160, wherein the stirring blade 160 is arranged in the hopper 110 and is used for stirring materials; and a controller for controlling the swing elbow 140 to swing and for controlling the average rotation speed of the stirring blade 160 during the rest period of the swing elbow 140 to be greater than the average rotation speed of the stirring blade 160 during the swing period of the swing elbow 140.
The control method of the stirring device 100 according to any one of the embodiments of the present invention is equivalent to the control method of the stirring device 100 according to any one of the embodiments of the present invention in that the controller is used for controlling the average rotation speed of the stirring blade 160 during the stationary phase of the swinging elbow pipe 140 to be greater than the average rotation speed of the stirring blade 160 during the swinging phase of the swinging elbow pipe 140, and controlling the stirring blade 160 to rotate and the swinging elbow pipe 140 to swing, so that the stirring device 100 according to any one of the embodiments of the present invention has all the advantages of the control method of the stirring device 100 according to any one of the embodiments of the present invention.
Example 7:
as shown in fig. 2 and 3, this embodiment provides a stirring device 100, which further includes the following technical features in addition to the technical features of the above-described embodiment.
The stirring blade 160 includes: a first stirring vane 162, the first stirring vane 162 being provided in the hopper 110 and near one side of the first conveying cylinder 120; a second stirring vane 164, the second stirring vane 164 being provided in the hopper 110 and near one side of the second conveying cylinder 130; wherein the stirring device 100 further comprises a first driving device 170 and a second driving device 180 which are controlled independently of each other, the first driving device 170 is connected to the first stirring vane 162 and is used for driving the first stirring vane 162 to rotate, and the second driving device 180 is connected to the second stirring vane 164 and is used for driving the second stirring vane 164 to rotate.
In this embodiment, the first stirring blade 162 and the second stirring blade 164 are disposed opposite to each other and can be controlled individually, and thus, in this embodiment, the rotational speed of the first stirring blade 162 and the rotational speed of the second stirring blade 164 can be controlled individually by the control method of the stirring device 100 according to any of the embodiments of the present invention.
Example 8:
the present embodiment provides a stirring device 100, which further includes the following technical features in addition to the technical features of the above-described embodiments.
The controller is further configured to: in a static state that the swing elbow is communicated with the first conveying cylinder, controlling the average rotating speed of the second stirring blade to be larger than that of the second stirring blade in the swing period of the swing elbow; and in a static state that the swing elbow is communicated with the second conveying cylinder, controlling the average rotating speed of the first stirring blade to be larger than that of the first stirring blade in the swing period of the swing elbow.
The present embodiment controls the average rotation speed of the second stirring blade to be larger than the average rotation speed thereof in the swing period in the stationary state, and controls the average rotation speed of the first stirring blade to be larger than the average rotation speed thereof in the swing period. The control method aims at: frequent speed regulation of the stirring device 100 is avoided, stirring efficiency is ensured, and a speed regulation control mode is simplified.
Example 9:
as shown in fig. 2 and 3, this embodiment provides a stirring device 100, which further includes the following technical features in addition to the technical features of the above-described embodiment.
The first driving device 170 includes a first motor 172, a first speed reducer 174 provided above the first motor 172, and a first transmission 176. The second drive device 180 includes a second motor 182, a second reduction gear 184 and a second transmission 186 provided above the first motor 172. Wherein the first transmission 176 is used to adjust the rotational speed of the first stirring vane 162 and the second transmission 186 is used to adjust the rotational speed of the second stirring vane 164.
In this embodiment, the first motor 172 powers rotation of the first stirring vane 162 and the second motor 182 powers rotation of the second stirring vane 164. The first speed reducer 174 is disposed on the output shaft of the first motor 172, and the second speed reducer 184 is disposed on the output shaft of the second motor 182. The motive force provided by the first motor 172 is reduced by the first speed reducer 174 and then transmitted to the first speed changer 176, and the first speed changer 176 may be connected with the controller to control the average rotation speed of the first stirring blade 162 during the rest period of the swinging elbow 140 to be greater than the average rotation speed of the first stirring blade 162 during the swinging period of the swinging elbow 140, or to output a certain regular rotation speed to the first stirring blade 162 by the control method of the stirring device 100 according to any embodiment of the present invention, so as to control the rotation speed of the first stirring blade 162. The motive force provided by the second motor 182 is reduced by the second speed reducer 184 and then transmitted to the second speed changer 186, and the second speed changer 186 may be connected with the controller to control the average rotation speed of the second stirring blade 164 in the rest period of the swinging elbow 140 to be greater than the average rotation speed of the second stirring blade 164 in the swinging period of the swinging elbow 140, or to output a certain regular rotation speed to the second stirring blade 164 by the control method of the stirring device 100 according to any embodiment of the present invention, so as to control the rotation speed of the second stirring blade 164.
Further, in a stationary state in which the swing elbow 140 communicates with the first delivery cylinder 120, the average rotation speed of the second stirring blade 164 is controlled to be larger than the average rotation speed of the second stirring blade 164 in the swing period of the swing elbow 140; in a stationary state in which the swing elbow 140 communicates with the second delivery cylinder 130, the average rotational speed of the first agitating blade 162 is controlled to be greater than the average rotational speed of the first agitating blade 162 during the swing period of the swing elbow 140. By this means, only the stirring speed of the stirring blade corresponding to the feeding cylinder for sucking material is increased, the frequency of the speed change of the first stirring blade 162 and the second stirring blade 164 can be reduced, and the service lives of the first transmission 176 and the second transmission 186 can be prolonged.
Example 10:
as shown in fig. 4, the present embodiment provides a pumping apparatus 200 including: pumping assembly 300 and stirring device 100 according to any of the embodiments of the present invention, stirring device 100 is used to supply material to pumping assembly 300. The pumping device 200 of the present embodiment may specifically be a concrete pump truck, a drag pump, a vehicle pump, a mortar pump, or the like. The pumping device 200 of the present embodiment includes the stirring apparatus 100 as any one of the embodiments of the present invention, and thus has all the advantageous effects of the stirring apparatus 100 as any one of the embodiments of the present invention.
Example 11:
the present embodiment provides a control method of a stirring device and a stirring device 100. The stirring device 100 is used for a pumping apparatus 200, and the pumping apparatus 200 is used for pumping concrete. The control method comprises the following steps: the change period of the rotation speed of the stirring blade 160 in the concrete feeding and sucking process is matched with the pumping and sucking period, so that the change period of the rotation speed of the stirring blade 160 is equal to the pumping and sucking period T2. In addition, in the present embodiment, during the operation of the stirring apparatus 100, the swing pipe 140 is divided into two stages according to whether the swing pipe 140 swings or not, that is, the swing period of the swing pipe 140 and the rest period of the swing pipe 140. During the swing period of the swing elbow 140, the average speed of the stirring blade 160 is relatively low, so as to save energy consumption in the process of pumping and sucking materials. While the average speed of the stirring vanes 160 is relatively high during the rest period of the swing elbow 140 to improve the flow properties of the concrete in the hopper 110.
The specific process of the control method is as follows.
During the swing period of the swing elbow 140, the swing period of the swing elbow 140 is divided into the earlier swing period (i.e. t is equal to or greater than 0 and equal to or less than t in FIG. 6) 1 Is included), the swing elbow 140 later stage (i.e.: t in FIG. 6 1 ≤t≤t 1 +t 2 Stage(s) of (a).
The stirring blade 160 is at least 0 and at most t 1 The rotational speed function of the stage (a) is: n=1.5×n 0 +0.5×n 0 ×cos[(π×t)/t 1 ]. Stirring vane 160 at t 1 ≤t≤t 1 +t 2 The rotational speed function of the stage (a) is: n=n 0 。
During the rest period of the swing elbow 140, the swing elbow is divided into a material suction front period (i.e. t in FIG. 6) 1 +t 2 ≤t≤t 1 +t 2 +t 3 Stage (s)) in the later stage of material suction (i.e.: t in FIG. 6 1 +t 2 +t 3 ≤t≤t 1 +t 2 +t 3 +t 4 Stage(s) of (c) stirring vane 160 at t 1 +t 2 ≤t≤t 1 +t 2 +t 3 The rotational speed function of the stage (a) is: n=1.5×n 0 +0.5×n 0 ×cos{[π×(t-t 1 -t 2 -t 3 )/t 3 ]}. Stirring vane 160 at t 1 +t 2 +t 3 ≤t≤t 1 +t 2 +t 3 +t 4 The rotational speed function of the stage (a) is: n=2×n 0 。
Where n is the real-time rotational speed of the stirring blade 160, n 0 For the set rotational speed of the stirring blade 160, t is the real-time the stirring blade 160 is in the set period, t 1 For the duration of the first swing period，t 2 For the duration of the second swing period, t 3 Is the duration of the first stationary phase. The total duration T of the set period is equal to T 1 +t 12 +t 3 +t 4 。
In order to achieve the above-mentioned function of adjusting the relevant stirring speed, there is also a need for a stirring device 100 for improving the pumping performance of concrete and sucking materials, which can adjust the rotation speed of the stirring vane 160 in a matching manner. The stirring device 100 includes a hopper 110, a first conveying cylinder 120, a second conveying cylinder 130, a swing elbow 140, a conveying pipe 150, and stirring blades 160. The hopper 110 is used to hold materials. The first transfer cylinder 120 communicates with the hopper 110 for drawing material from the hopper 110. The second conveying cylinder 130 communicates with the hopper 110 for sucking material from the hopper 110. The swing elbow 140 is disposed in the hopper 110 and includes a first open end 142 and a second open end 144 disposed opposite one another, the swing elbow 140 being configured to allow the first open end 142 to be in communication engagement with the first delivery cylinder 120 or the second delivery cylinder 130 by swinging. A transfer tube 150 communicates with the second open end 144 for transporting material from either the first transfer cylinder 120 or the second transfer cylinder 130 out of the hopper 110. A stirring blade 160 is provided in the hopper 110 for stirring the material. The stirring device 100 adopts the control method of the stirring device 100 according to any embodiment of the present invention, and controls the stirring blade 160 to rotate and controls the swing elbow 140 to swing. The stirring blade 160 includes: a first stirring blade 162 and a second stirring blade 164. The first driving device 170 is connected to the first stirring vane 162 and serves to drive the first stirring vane 162 to rotate, and the second driving device 180 is connected to the second stirring vane 164 and serves to drive the second stirring vane 164 to rotate. The first driving device 170 includes a first motor 172, a first speed reducer 174 disposed above the first motor 172, and a first transmission 176. The second drive device 180 includes a second motor 182, a second reduction gear 184 and a second transmission 186 provided above the first motor 172. Wherein the first transmission 176 is used to adjust the rotational speed of the first stirring vane 162 and the second transmission 186 is used to adjust the rotational speed of the second stirring vane 164. The first stirring vane 162 and the second stirring vane 164 of the present embodiment can be controlled individually. The inputs of the first transmission 176 and the second transmission 186 are rotated at a constant speed, the outputs are rotated at a variable speed, and the output rotation speed is adjustable.
In this embodiment, the average speed of the stirring blade 160 is controlled to be relatively low during the swinging period of the swinging elbow 140, so that energy consumption in the pumping and sucking process is saved, and the average speed of the stirring blade 160 is controlled to be relatively high during the resting period of the swinging elbow 140, so that the flowing performance of concrete in the hopper 110 is improved, and the pumping and sucking efficiency is improved. In addition, in this embodiment, the rotation speed of the stirring blade 160 is adjusted according to the reversing period of the swinging elbow 140, so that the concrete in the hopper 110 of the concrete pumping system after adjustment has better fluidity, and the pumping and sucking efficiency is further improved.
In summary, the beneficial effects of the embodiment of the invention are as follows:
1. the embodiment of the present invention can reasonably control the rotation speed variation of the stirring vane 160, so that the rotation speed of the stirring vane 160 is varied in real time according to the conveying condition of the first and second conveying cylinders 120 and 130 and the swing state of the swing elbow 140, and thus the suction performance of the stirring apparatus 100 is improved.
2. Embodiments of the present invention can save energy consumption during pumping and sucking, and can improve the flow performance of the material in the hopper 110 during the rest period.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The control method of the stirring device is characterized in that the stirring device comprises a hopper, a first conveying cylinder and a second conveying cylinder which are respectively communicated with the hopper, a swinging elbow pipe which is arranged in the hopper and comprises a first opening end and a second opening end, a conveying pipe which is communicated with the first opening end, and stirring blades which are arranged in the hopper, the swinging elbow pipe comprises a rest period and a swinging period in the working state of the stirring device, the first conveying cylinder or the second conveying cylinder is communicated with the conveying pipe through the swinging elbow pipe in the rest period, and the swinging period is used for switching the communication between the second opening end and the first conveying cylinder or the second conveying cylinder; the control method comprises the following steps:
controlling the stirring blades to run at different average rotating speeds in the stationary period and the swinging period, wherein the average rotating speed of the stirring blades in the stationary period is larger than that of the stirring blades in the swinging period;
the swing period includes a first swing period in which the rotation speed of the stirring blade is gradually reduced and a second swing period after the first swing period in which the rotation speed of the stirring blade is kept constant;
the stationary periods include a first stationary period in which the rotational speed of the stirring blade gradually increases and a second stationary period after the first stationary period in which the rotational speed of the stirring blade is kept constant.
2. A control method of a stirring apparatus according to claim 1, wherein,
in the first swing period, the rotation speed of the stirring blade is controlled by the following formula:
n＝(1+K)×n 0 +K×n 0 ×cos[(π×t)/t 1 ]；
in the second swing period, the rotation speed of the stirring blade is controlled by the following formula:
n＝n 0 ；
wherein n is the real-time rotating speed of the stirring blade, n 0 For the set rotating speed of the stirring blade, t is the real-time of the stirring blade in the set period, and t 1 And K is a positive number for the duration of the first swing period.
3. A control method of a stirring apparatus according to claim 1, wherein,
in the first stationary phase, the rotational speed of the stirring blade is controlled by the following formula:
n＝(1+K)×n 0 +K×n 0 ×cos{[π×(t-t 1 -t 2 -t 3 )/t 3 ]}；
in the second stationary phase, the rotational speed of the stirring blade is controlled by the following formula:
n＝(1+2K)×n 0 ；
wherein n is the real-time rotating speed of the stirring blade, n 0 For the set rotating speed of the stirring blade, t is the real-time of the stirring blade in a set period, wherein the swinging period comprises a first swinging period and a second swinging period after the first swinging period, and t 1 T is the duration of the first swing period 2 T is the duration of the second swing period 3 And K is a positive number for the duration of the first resting period.
4. A stirring device, characterized by comprising:
a hopper for containing material;
a first conveying cylinder in communication with the hopper for sucking or pumping the material from the hopper;
a second conveying cylinder in communication with the hopper for sucking or pumping the material from the hopper;
the swing elbow is arranged in the hopper and comprises a first opening end and a second opening end which are oppositely arranged, and the swing elbow is used for switching the communication between the second opening end and the first conveying cylinder or the second conveying cylinder in a swing period;
a transfer tube in communication with the second open end for delivering the material from the first transfer cylinder or the second transfer cylinder out of the hopper;
the stirring blade is arranged in the hopper and is used for stirring the materials;
the controller is used for controlling the swing elbow to swing and controlling the average rotating speed of the stirring blade in the rest period of the swing elbow to be larger than the average rotating speed of the stirring blade in the swing period of the swing elbow;
the swinging period of the swinging elbow pipe comprises a first swinging period and a second swinging period after the first swinging period, the rotation speed of the stirring blade is gradually reduced in the first swinging period, and the rotation speed of the stirring blade is kept constant in the second swinging period;
the stationary period of the swing elbow includes a first stationary period in which the rotational speed of the stirring blade gradually increases and a second stationary period after the first stationary period in which the rotational speed of the stirring blade is kept constant.
5. The stirring device of claim 4, wherein the stirring blade comprises:
the first stirring blade is arranged in the hopper and is close to one side of the first conveying cylinder;
the second stirring blade is arranged in the hopper and is close to one side of the second conveying cylinder;
the stirring device further comprises a first driving device and a second driving device which are independently controlled, wherein the first driving device is connected with the first stirring blade and used for driving the first stirring blade to rotate, and the second driving device is connected with the second stirring blade and used for driving the second stirring blade to rotate.
6. The stirring device of claim 5, wherein the controller is further configured to:
controlling the average rotating speed of the second stirring blade to be larger than the average rotating speed of the second stirring blade in the swinging period of the swinging elbow pipe in a static state that the swinging elbow pipe is communicated with the first conveying cylinder;
and in a static state that the swing elbow is communicated with the second conveying cylinder, controlling the average rotating speed of the first stirring blade to be larger than the average rotating speed of the first stirring blade in the swing period of the swing elbow.
7. A stirring apparatus as set forth in claim 6, wherein,
the first driving device comprises a first motor, a first speed reducer and a first speed changer, wherein the first speed reducer and the first speed changer are arranged on the first motor;
the second driving device comprises a second motor, a second speed reducer and a second speed changer, wherein the second speed reducer and the second speed changer are arranged on the first motor;
the first speed changer is used for adjusting the rotation speed of the first stirring blade, and the second speed changer is used for adjusting the rotation speed of the second stirring blade.
8. A pumping apparatus, comprising:
a pumping assembly;
a stirring device as set forth in any one of claims 4 to 7 for supplying material to said pumping assembly.
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