A double-bucket mixing and taking machine and a taking method thereof

Abstract

A double-drum mixing uniform material taking machine and a material taking method thereof belong to the technical field of material taking control. The material taking method of the double-drum mixing uniform material taking machine comprises the following steps: according to the size of the average material taking amount, the cross section of the mixing uniform material pile is divided into three regions of a middle part and two sides; the double-drum trolley is controlled to take material n times back and forth in the middle part region and take material once in each of the two side regions; the material is taken in the middle part region and the two side regions in the mode of step 2, until a stop material taking command is received; the present application has the beneficial effect that the present application is simple and efficient in material taking, reduces the fluctuation range of the material taking amount, improves the average material taking flow, and improves the material taking efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material taking control, and particularly relates to a double-bucket wheel mixing material taking machine and a material taking method thereof. BACKGROUND

[0002] At present, in a raw material yard of a metallurgical enterprise, a mixing and blending bin is often used to mix multiple kinds of raw materials into a mixed material pile with stable composition according to a certain proportion, and then a double-bucket wheel material taking machine is used to send the mixed material to a sintering material bin. The existing double-bucket wheel material taking machine can move along the length direction of the material pile. A double-bucket wheel trolley is arranged on the double-bucket wheel material taking machine. The double-bucket wheel trolley can slide along the crossbeam of the material taking machine, and a corresponding material taking position can be selected.

[0003] The existing material taking method is that the double-bucket wheel trolley moves back and forth along the crossbeam of the material taking machine, so that the double-bucket wheel trolley moves from one side to the other side along the cross section of the material pile, and so on. Since the amount of material gradually decreases from the middle part to the two end parts of the cross section of the mixed material pile, the amount of material taken by the double-bucket wheel material taking machine presents periodic large fluctuation in the material taking process, which reduces the material taking efficiency.

[0004] For example, a patent with publication number CN108328354B discloses a method for controlling the amount of material taken by a bucket wheel material taking machine. The method includes: obtaining a first amount of material on a weighing device; detecting a material taking flow rate of the bucket wheel in real time; determining a second amount of material that has been excavated by the bucket wheel at the current time but has not been transported to the weighing device according to the material taking flow rate; estimating a third amount of material excavated by the bucket wheel material taking machine in the deceleration process if the material taking is stopped at the current time according to the material taking flow rate; and controlling the bucket wheel material taking machine to stop taking material according to the first amount of material, the second amount of material, the third amount of material and a total amount of material to be taken. The above-mentioned method for controlling the amount of material taken still cannot solve the problem that the amount of material taken by the double-bucket wheel material taking machine presents periodic large fluctuation in the material taking process due to the gradual decrease of the amount of material from the middle part to the two end parts of the cross section of the mixed material pile. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a double-bucket wheel mixing material taking machine and a material taking method thereof, which can solve the problem that the amount of material taken by the double-bucket wheel material taking machine presents periodic large fluctuation in the material taking process due to the gradual decrease of the amount of material from the middle part to the two end parts of the cross section of the mixed material pile, and can improve the material taking efficiency.

[0006] To achieve the above object, the technical scheme adopted by the present application to solve the technical problems is that the double-bucket wheel mixing material taking machine material taking method comprises the following steps:

[0007] Step 1: according to the size of the average amount of material taken, the cross section of the mixed material pile is divided into three regions of the middle part and the two sides;

[0008] Step 2: control the double-drum trolley to take materials in the middle region back and forth for n times, and take materials in each of the two side regions once;

[0009] Step 3: take materials in the middle region and the two side regions in the manner of step 2 until a stop taking material command is received.

[0010] In the step 1, the average taking material amount is taken as a boundary of 60% of the belt load, when the average taking material amount is greater than 60% of the belt load, it is the middle region, and when the average taking material amount is less than or equal to 60% of the belt load, it is the two side regions.

[0011] In the step 2, the taking material path of the double-drum trolley is: the double-drum trolley takes materials from one side region of the mixed material pile, then takes materials in the middle region back and forth for n times, finally takes materials from the other side region of the mixed material pile and returns to the original taking material position; or the double-drum trolley takes materials in the middle region back and forth for n times, then takes materials from one side region of the mixed material pile, finally takes materials from the other side region of the mixed material pile and returns to the original taking material position.

[0012] In the step 2, the double-drum trolley sets the taking material flag bit to 1 after taking materials each time, and resets the non-taking material flag bit to 0.

[0013] In the step 2, the double-drum trolley walks a set distance along the length direction of the mixed material pile after taking materials each time, and then takes materials next time.

[0014] In the step 2, the double-drum trolley takes materials in the middle region back and forth for n times, wherein n is an even number not less than 2.

[0015] In the step 2, when the double-drum trolley enters one side region from the middle region, the speed is increased before the double-drum trolley approaches the boundary of one side region, and then the speed is decreased until the double-drum trolley stops at the boundary of one side region.

[0016] After the double-drum trolley enters one side region and the speed is increased, the speed is increased by 10% to 17% relative to the speed in the middle region.

[0017] A double-drum mixing taking material machine is applied to the double-drum mixing taking material method, and includes two parallel walking tracks arranged at two sides of a mixed material pile respectively and a cross beam moving along the walking tracks, one end of the cross beam is provided with a walking trolley driving the cross beam to move, and the cross beam is slidably connected with a double-drum trolley along the length direction of the cross beam.

[0018] The double-drum trolley includes two drums connected through a trolley frame, the trolley frame is slidably connected on the cross beam, and a driving motor is arranged on the trolley frame and drives the trolley frame to move along the cross beam; a taking material belt is arranged between the two drums.

[0019] The double-drum mixing taking material machine has the following beneficial effects:

[0020] 1. The application provides a kind of double-drum mixing and blending material taking machine taking material method, by the size of average material taking amount, the cross section of mixing and blending material pile is divided into middle and two sides, double-drum trolley is taken material n times in material pile middle, then each is taken material 1 time in material pile two side regions, so that double-drum trolley is taken material in partition, and taking material is simple and efficient, reduce the fluctuation range of material taking amount, improve the average material taking flow, improve the taking material efficiency.

[0021] 2. The application divides with the 60% of average material taking amount as the boundary of belt load, when average material taking amount is greater than the 60% of belt load, it is middle region, when average material taking amount is less than or equal to the 60% of belt load, it is two side regions, can accurately divide the three regions of the cross section of mixing and blending material pile according to different material pile shape, further reduce the fluctuation range of later material taking amount.

[0022] 3. The application provides two kinds of taking material methods when taking material in the cross section of mixing and blending material pile, one method is taken material from one side region of mixing and blending material pile, then n times of back-and-forth taking material in middle region, finally taken material from the other side region of mixing and blending material pile and return to original taking position, another method is n times of back-and-forth taking material from middle region of mixing and blending material pile, then taken material from one side region of mixing and blending material pile, finally taken material from the other side region of mixing and blending material pile and return to original taking position, taking material method is flexible, and taking material efficiency is high.

[0023] 4. When double-drum trolley in the application enters one side region from middle region, speed up and then slow down when approaching one side region boundary, until stop when reaching one side region boundary, can reduce instantaneous material taking amount on both sides of material pile, avoid too much instantaneous material amount and exceed the load of belt, at the same time, reduce the time of taking material on both sides of material pile, improve the efficiency of taking material, and avoid the problem of collision caused by too much inertia when double-drum trolley stops. DETAILED DESCRIPTION

[0024] The following is a brief description of the content expressed by each figure in the specification of the application and the marks in the figure:

[0025] Figure 1 It is the structure diagram of double-drum mixing and blending material taking machine in the application;

[0026] Figure 2 It is the structure diagram of one kind of taking material path (example one) in the taking material method of the application;

[0027] Figure 3 It is the curve diagram of taking material amount of example one;

[0028] Figure 4 It is the structure diagram of another kind of taking material path (example two) in the taking material method of the application;

[0029] Figure 5 Structure diagram of a material taking path in a material taking method of the prior art (comparative example 1) ;

[0030] Figure 6 Graph of a material taking amount of comparative example 1;

[0031] The marks in the above figures are as follows: 1. walking track, 2. cross beam, 3. walking car, 4. double-bucket car, 41. bucket, 42. car frame, 43. driving motor, 44. material taking belt. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to explain the present application but not to limit the scope of the present application.

[0033] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The specific embodiment of the present application is as follows: Figure 1 As shown in the figure, the present application provides a double-bucket 41 mixing material taking machine, which comprises two parallel walking tracks 1 arranged on both sides of a mixing material pile respectively and a cross beam 2 moving along the walking track 1, one end of the cross beam 2 is provided with a walking car 3 driving the cross beam 2 to move along the walking track 1, both ends of the cross beam 2 are provided with rollers which are rollingly connected on the walking track 1, the walking car 3 can move along the length direction of the walking track 1, so as to drive the cross beam 2 to travel along the walking track 1, travel a distance for material taking when the material taking direction is changed, and realize the uniform material taking of the material pile in layers.

[0036] The beam 2 is slidably connected with a double-drum 41 trolley 4 along the length direction thereof, the double-drum 41 trolley 4 comprises two drum wheels 41 connected through a trolley frame 42, the two drum wheels 41 are always in rotating state during material taking, and the rotation of the drum wheels 41 can be realized by being driven by motors; the trolley frame 42 is slidably connected on the beam 2, a roller moving along the beam 2 can be arranged on the trolley frame 42, a driving motor 43 driving the trolley frame 42 to move along the beam 2 is arranged on the trolley frame 42, the driving motor 43 can be connected with one roller on the trolley frame 42 through a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism, and the roller can be driven to rotate, so that the trolley frame 42 slides along the beam 2, thereby realizing the adjustment of different material taking positions.

[0037] The two drum wheels 41 are provided with a material taking belt 44 therebetween, the material taking belt 44 is a structure on a belt conveyor, when the two drum wheels 41 rotate to the uppermost position, the material in the drum wheels 41 is turned over to the material taking belt 44, and the material taking belt 44 is driven by the belt conveyor to be transported to a designated position.

[0038] The application further provides a material taking method of the double-drum mixed material taking machine, which is specifically described in the following embodiments.

[0039] Embodiment one

[0040] The embodiment takes the belt load of 2000t / h as an example to illustrate a material taking method of the double-drum mixed material taking machine, which comprises the following steps.

[0041] Step 1: according to the size of the average material taking amount, the cross section of the mixed material pile is divided into three regions of middle and two sides.

[0042] The calculation method of the average material taking amount is that the size of the material taking amount is monitored in real time by a belt scale, the belt scale transmits the signal of the material taking amount to a control unit, and the average material taking amount of different regions of the mixed material pile can be calculated through the control unit.

[0043] Since the cross section shape of the mixed material pile is a triangle, the total amount of the material in the middle region is more, and the amount of the material in the two side regions is less. The best material taking amount of the material taking machine is mainly determined by the load of the belt, when the instantaneous material taking amount of the material taking machine is close to 2000t / h, it is the best, at this time, the average material taking amount is also close to 2000t / h, but as the material taking runs to the two sides, the instantaneous flow gradually decreases, in order to improve the average material taking amount, when the average material taking amount decreases to 60% of the belt load, that is, 2000*60% = 1200t / h, the boundary is divided, and when it is greater than 1200t / h, it is the middle region, and when it is less than 1200t / h, it is the two side regions.

[0044] Since the shapes of the material piles are different, the boundary distances of each material taking machine are also different, the three regions of the cross section of the mixed material pile can be accurately divided by 60% of the belt load, and the fluctuation range of the material taking amount in the later stage is further reduced.

[0045] Step 2: control the double-drum car to take material n times in the middle area and take material once in each of the two side areas.

[0046] The material taking path is: the double-drum car takes material from one side area of the mixed material pile, then takes material n times in the middle area, and finally takes material from the other side area of the mixed material pile and returns to the original taking position. After each taking, the material taking machine walks a set distance along the length direction of the mixed material pile and then takes material again. Moreover, the double-drum car sets the taking flag to 1 and resets the non-taking flag to 0 after each taking. The double-drum car takes material n times in the middle area, where n is an even number not less than 2, and takes material once in each of the two side areas.

[0047] As shown in FIG. 1, taking material from the right side area of the mixed material pile is taken as an example, and the double-drum car takes material 2 times in the middle area and takes material once in each of the two side areas. The specific material taking method is as follows: Figure 2

[0048] 1) The double-drum car takes material from the right side of the material pile, and the right side area taking flag is set to 1;

[0049] 2) When the double-drum car runs to the right boundary of the left side area, it stops, and the left side area taking flag is reset to 0;

[0050] 3) The walking car walks a set distance, i.e., the walking car takes a certain distance in a certain time (the time can be determined according to the taking area of the drum, and the walking distance needs to be the width of the taking area to ensure uniform taking);

[0051] 4) When the double-drum car runs to the left boundary of the right side area, it stops, and the right side area taking flag is reset to 0;

[0052] 5) The walking car walks a set distance, i.e., the walking car takes a certain distance in a certain time;

[0053] 6) When the double-drum car runs to the left boundary of the left side area, it stops, and the left side area taking flag is modified to 1;

[0054] 7) The walking car walks a set distance, i.e., the walking car takes a certain distance in a certain time;

[0055] 8) When the double-drum car runs to the right boundary of the right side area, it stops.

[0056] ​During the material handling process described above, when the double-bucket wheel trolley enters a side area from the central area, it accelerates forward and then slows down as it approaches the boundary of the side area, stopping only when it reaches the boundary. The speed of the double-bucket wheel trolley increases by 10% to 17% compared to its speed in the central area after entering the side area. In this embodiment, the speed of the double-bucket wheel trolley increases by 15% when entering the side area from the central area. A position sensor can be installed near the right boundary of the right side of the material pile or the left boundary of the left side of the material pile to provide a deceleration limit signal. An acceleration signal is set at less than 60% of the belt load, ensuring that the double-bucket wheel trolley accelerates first and then decelerates when entering the side area from the central area. This reduces the instantaneous material handling volume on both sides of the material pile, preventing excessive instantaneous material volume from exceeding the belt load. It also reduces the time spent handling material on both sides of the material pile, improving handling efficiency and preventing collisions due to excessive inertia when the double-bucket wheel trolley stops.

[0057] Step 3: Repeat the process in Step 2 to collect materials in the central and side areas until a stop material collection command is received.

[0058] like Figure 3 The figure shows the curve of material output over time, with an average output of 1832 t / h.

[0059] Example 2

[0060] The difference from Example 1 is that the specific material taking method in step 2 is different.

[0061] like Figure 4 As shown, this embodiment takes the process of taking material from the middle region of the mixed material pile as an example, and the double bucket wheel trolley makes two round trips to take material from the middle region and one round trip from each of the two side regions. The specific material taking method is as follows:

[0062] 1) When the double bucket wheel trolley starts picking up material from the right boundary of the left side area of ​​the material pile, the material picking flag of the left side area is reset to 0;

[0063] 2) When the double bucket wheel trolley moves to the right and reaches the left boundary of the right area, it stops and the material pick-up flag of the right area is reset to 0;

[0064] 3) The traveling trolley moves forward a set distance, which is the material taking inch of the trolley and a certain amount of time (the time can be determined according to the material taking area of ​​the bucket wheel. It is necessary to ensure that the distance traveled is the width of the material taking area to ensure uniform material taking).

[0065] 4) When the double bucket wheel trolley moves to the left and reaches the left boundary of the left area, it stops and the material pick-up flag of the left area is changed to 1;

[0066] 5) The traveling trolley moves forward a set distance, which is equivalent to the trolley taking a certain amount of time to move forward to pick up the material;

[0067] 6) The double-drum trolley runs to the right to the right boundary of the right region, and stops, and the right region taking material mark is 1;

[0068] 7) The walking car runs forward for a set distance.

[0069] 8) The double-drum trolley runs to the left to the right boundary of the left region of the material pile, and stops.

[0070] 9) Steps 1) to 8) are repeated, and when a command to stop taking material is received, the double-drum trolley stops running, and all mark bits are reset.

[0071] In the above taking material process, when the double-drum trolley enters a side region from the middle region, the speed is increased before entering the side region, and the speed is decreased when approaching the boundary of the side region, until the double-drum trolley stops at the boundary of the side region; the speed of the double-drum trolley after entering the side region is increased by 10% to 17% relative to the speed in the middle region.

[0072] Comparative Example 1

[0073] As shown in FIG. 1, the comparative example starts taking material from the right region of the mixed material pile, and the specific taking material method is as follows: Figure 5 1) The double-drum trolley starts taking material from the right side of the material pile.

[0074] 2) The double-drum trolley runs to the left to the left boundary of the left region of the material pile, and stops.

[0075] 3) The walking car runs forward for a set distance.

[0076] 4) The double-drum trolley runs to the right to the right boundary of the right region, and stops.

[0077] The above steps 1) to 4) are repeated, and when a command to stop taking material is received, the double-drum trolley stops running.

[0078] As shown in FIG. 2, it is a curve diagram of the taking material amount changing with time, and the average taking material amount is 1624 t / h.

[0079] Figure 6 Therefore, from the above example 1 and comparative example 1, it can be seen that:

[0080] 1) The present application divides the cross section of the mixed material pile into a middle region and two side regions according to the average taking material amount, so that the double-drum trolley takes material n times in the middle region of the material pile, and takes material once in each of the two side regions, so that the double-drum trolley takes material in different regions, which is simple and efficient, reduces the fluctuation range of the taking material amount, improves the average taking material flow, and improves the taking material efficiency.

[0081] 1) The present application divides the cross section of the mixed material pile into a middle region and two side regions according to the average taking material amount, so that the double-drum trolley takes material n times in the middle region of the material pile, and takes material once in each of the two side regions, so that the double-drum trolley takes material in different regions, which is simple and efficient, reduces the fluctuation range of the taking material amount, improves the average taking material flow, and improves the taking material efficiency.

[0082] ​2) The present application divides the average material taking amount as 60% of the belt load as the boundary, when the average material taking amount is greater than 60% of the belt load, it is the middle region, when the average material taking amount is less than or equal to 60% of the belt load, it is the two side regions, the three regions of the mixed material pile cross section can be accurately divided according to different material pile shapes, and the fluctuation range of the later material taking amount is further reduced.

[0083] 3) The present application provides two material taking methods when taking material in the three regions of the mixed material pile cross section, one method is to take material from one side region of the mixed material pile, then take material n times in the middle region, finally take material from the other side region of the mixed material pile and return to the original taking position; the other method is to take material n times in the middle region of the mixed material pile, then take material from one side region of the mixed material pile, finally take material from the other side region of the mixed material pile and return to the original taking position. The material taking method is flexible and the material taking efficiency is high.

[0084] 4) When the double-drum trolley in the present application enters one side region from the middle region, the speed is increased, then the speed is decreased when approaching the boundary of one side region, until the double-drum trolley stops when reaching the boundary of one side region, the instantaneous material taking amount of the two sides of the material pile can be reduced, the instantaneous material amount exceeding the belt load can be avoided, the time of taking material on the two sides of the material pile is reduced, the material taking efficiency is improved, and the problem of collision caused by too large inertia when the double-drum trolley stops is avoided.

[0085] The above is only to illustrate some principles of the present application by means of figures, this specification is not intended to limit the present application to the specific structures and application ranges shown and described, therefore all possible corresponding modifications and equivalents can be utilized, which belong to the patent scope applied by the present application.

Claims

1. A method for taking out material by a double-bucket reclaimer, characterized by, The method comprises the following steps: Step 1: according to the average material taking amount, the cross section of the mixed material pile is divided into a middle part and two side parts; Step 2: the double-drum trolley is controlled to take material n times in the middle part and once in each side part; Step 3: the material taking in the middle part and the side parts is cycled according to the mode of step 2 until a stop taking material command is received.

2. The dual-dump reclaimer reclaiming method according to claim 1, characterized in that: In the step 1, the middle part is the part when the average material taking amount is greater than 60% of the belt load, and the side part is the part when the average material taking amount is less than or equal to 60% of the belt load.

3. The dual-dump reclaimer reclaiming method according to claim 1, characterized in that: In the step 2, the material taking path of the double-drum trolley is that the double-drum trolley takes material from one side part of the mixed material pile, then takes material n times in the middle part, finally takes material from the other side part of the mixed material pile and returns to the original taking position; or the double-drum trolley takes material n times in the middle part, then takes material from one side part of the mixed material pile, finally takes material from the other side part of the mixed material pile and returns to the original taking position.

4. The dual-dump reclaimer reclaiming method according to claim 1, characterized in that: In the step 2, the double-drum trolley sets the material taking flag bit to 1 and resets the non-material taking flag bit to 0 after each material taking.

5. The dual-dump reclaimer reclaiming method according to claim 1, characterized in that: In the step 2, the double-drum trolley walks a set distance along the length direction of the mixed material pile after each material taking and then takes material again.

6. The dual-dump reclaimer reclaiming method according to claim 1, wherein: In the step 2, the double-drum trolley takes material n times in the middle part, wherein n is an even number not less than 2.

7. The dual-dump reclaimer reclaiming method according to claim 1, characterized in that: In the step 2, when the double-drum trolley enters one side part from the middle part, the speed of the double-drum trolley is increased by 10% to 17% relative to the speed in the middle part.

8. The dual-dump reclaimer reclaiming method according to claim 7, characterized in that: The double-drum trolley enters one side part at a high speed and then slows down when approaching the boundary of the side part until stopping at the boundary of the side part.

9. A double-bucket reclaimer for use in the method of claim 1 to 8, wherein The speed of the double-drum trolley entering one side part at a high speed is increased by 10% to 17% relative to the speed in the middle part.

10. The twin-bucket reclaimer according to claim 9, characterized in that: The method comprises the following steps: Step 1: according to the average material taking amount, the cross section of the mixed material pile is divided into a middle part and two side parts; Step 2: the double-drum trolley is controlled to take material n times in the middle part and once in each side part; Step 3: the material taking in the middle part and the side parts is cycled according to the mode of step 2 until a stop taking material command is received. In the step 1, the middle part is the part when the average material taking amount is greater than 60% of the belt load, and the side part is the part when the average material taking amount is less than or equal to 60% of the belt load. In the step 2, the material taking path of the double-drum trolley is that the double-drum trolley takes material from one side part of the mixed material pile, then takes material n times in the middle part, finally takes material from the other side part of the mixed material pile and returns to the original taking position; or the double-drum trolley takes material n times in the middle part, then takes material from one side part of the mixed material pile, finally takes material from the other side part of the mixed material pile and returns to the original taking position. In the step 2, the double-drum trolley sets the material taking flag bit to 1 and resets the non-material taking flag bit to 0 after each material taking. In the step 2, the double-drum trolley walks a set distance along the length direction of the mixed material pile after each material taking and then takes material again. In the step 2, the double-drum trolley takes material n times in the middle part, wherein n is an even number not less than 2. In the step 2, when the double-drum trolley enters one side part from the middle part, the speed of the double-drum trolley is increased by 10% to 17% relative to the speed in the middle part. The double-drum trolley enters one side part at a high speed and then slows down when approaching the boundary of the side part until stopping at the boundary of the side part. The speed of the double-drum trolley entering one side part at a high speed is increased by 10% to 17% relative to the speed in the middle part.

Images