A method for analyzing and judging aggregate gradation variation

Abstract

The present invention discloses a method for analyzing and judging the variation of aggregate gradation, which comprises the following steps: First, an overflow buffer bin is installed on the hot material bin; Second, the detection of the level sensor; Third, the acquisition of the overflow coefficient; Fourth, the judgment of the overflow state of the hot material bin. The method of the present invention has simple steps and reasonable design, accurately judges the overflow state of each hot material bin, so as to facilitate the construction personnel to take measures to control the accuracy of the aggregate gradation.

Description

Technical Field

[0001] The invention belongs to the technical field of hot bin overflow, and particularly relates to a method for analyzing and judging aggregate gradation variation. Background Art

[0002] When the existing mixing equipment produces mixed materials, the aggregates are classified and stacked by particle size, subjected to secondary screening, and metered and stirred according to the designed mix ratio to form mixed materials meeting the design requirements. However, during the batching process of the hot bin and the sand and stone weighing hopper, there is an overflow phenomenon in the hot bin. Since the height of the bin is relatively high, manual workers cannot detect the overflow in time, which will cause waste of aggregates and increase the construction cost. In addition, even if the overflow can be detected in time by sensors, construction workers cannot determine whether the overflow in the hot bin is within the normal fluctuation range, and thus cannot give correct theoretical guidance on whether the aggregate gradation has varied and whether the gradation needs to be adjusted.

[0003] Therefore, a method for analyzing and judging aggregate gradation variation with simple steps and reasonable design is needed to accurately judge the overflow state of each hot bin, so as to facilitate construction workers to take measures to control the accuracy of aggregate gradation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for analyzing and judging aggregate gradation variation aiming at the deficiencies in the above-mentioned prior art. The method has simple steps and reasonable design, can accurately judge the overflow state of each hot bin, and thus facilitates construction workers to take measures to control the accuracy of aggregate gradation.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a method for analyzing and judging aggregate gradation variation, wherein a plurality of hot bins are arranged in the hot bin, and the bottoms of the plurality of hot bins are connected to a sand and stone weighing hopper. The method includes the following steps:

[0006] Step 1: Install an overflow buffer bin on the hot bin:

[0007] Step 101: Denote the plurality of hot bins as the 1st hot bin,..., the ith hot bin,..., the Ith hot bin in ascending order of the aggregate particle size they contain; where i and I are both positive integers, and 1 ≤ i ≤ I; a ith low level sensor and a ith high level sensor are arranged in the ith hot bin;

[0008] Step 102: Set a ith overflow buffer bin on the ith hot bin, and set a ith discharging component at the top of the ith hot bin; wherein, the number of the overflow buffer bins is the same as the number of the hot bins, and the ith discharging component is communicated with the ith overflow buffer bin;

[0009] Step 103: Install the i-th base on the i-th hot material bin, and the i-th weighing sensor is arranged on the i-th base.

[0010] Step 104: Connect the bottom of the i-th overflow buffer bin to the connected sand and gravel weighing hopper through the i-th upper feeding channel and the i-th lower feeding channel; wherein, a soft connection pipe is arranged between the i-th upper feeding channel and the i-th lower feeding channel, and a butterfly valve is arranged on the i-th upper feeding channel.

[0011] Step Two: Detection of the level sensor

[0012] During the operation of the i-th hot material bin and the sand and gravel weighing hopper, the i-th high level sensor detects the level of the i-th hot material bin in real time, and the i-th low level sensor detects the level of the i-th hot material bin in real time.

[0013] Step Three: Obtaining the overflow coefficient

[0014] Step 301: When the i-th high level sensor detects that the level of the i-th hot material bin reaches the high level, the overflow material in the i-th hot material bin is conveyed to the i-th overflow buffer bin through the discharging component.

[0015] Step 302: During the process of conveying the overflow material in the i-th hot material bin to the i-th overflow buffer bin, the i-th weighing sensor detects the weight of the overflow material in the i-th overflow buffer bin in real time until the set overflow judgment time is reached, and the overflow weight Q of the i-th hot material bin within the set overflow judgment time is obtained. i ; wherein, the value of the set overflow judgment time is 10 min

[0016] Step 303: According to the formula Obtain the overflow coefficient λ of the i-th hot material bin i ; wherein, A i represents 10% of the set dosage of the aggregate in the i-th hot material bin.

[0017] Step Four: Judgment of the overflow state of the hot material bin

[0018] Judge that when 0 < λ i ≤ 0.25, the aggregate in the i-th hot material bin fluctuates normally, and the i-th hot material bin continues to work;

[0019] Judge that when 0.25 < λ i ≤ 0.5, the aggregate in the i-th hot material bin fluctuates generally; judge that when 0.5 < λ i ≤ 0.75, the aggregate in the i-th hot material bin fluctuates greatly; judge that when 0.75 < λ iWhen ≤ 1, there is a significant fluctuation in the aggregate weight of the i-th hot aggregate bin, and the controller controls the alarm to sound, indicating that there is an aggregate gradation variation in the i-th hot aggregate bin.

[0020] The above method for analyzing and judging aggregate gradation variation is characterized in that: in step 301, the overflow material in the i-th hot aggregate bin is transported to the i-th overflow buffer bin through the discharging component, and the specific process is as follows:

[0021] Operate the i-th upper screw conveyor to work. The i-th upper screw conveyor transports the aggregate in the i-th hot aggregate bin through the i-th discharging port through the i-th conveying round pipe; the aggregate in the i-th conveying round pipe enters the i-th overflow buffer bin through the i-th upper flexible connecting pipe.

[0022] The above method for analyzing and judging aggregate gradation variation is characterized in that: when it is necessary to take a sample from the i-th overflow buffer bin, the specific process is as follows:

[0023] Operate the i-th lower screw conveyor to work. The i-th lower screw conveyor transports the overflow material in the i-th overflow buffer bin through the i-th material taking port to the outside of the i-th overflow buffer bin through the i-th lower screw conveyor, and then takes a sample through the i-th sampling pipe.

[0024] The above method for analyzing and judging aggregate gradation variation is characterized in that: when it is necessary to compensate the overflow material in the i-th overflow buffer bin to the sand and stone weighing hopper, control the i-th butterfly valve to open, and compensate the overflow material in the i-th overflow buffer bin to the sand and stone weighing hopper through the i-th upper discharging channel and the i-th lower discharging channel.

[0025] The present invention has the following advantages compared with the prior art:

[0026] 1. The method of the present invention has simple steps, is easy to implement and operate, and can accurately judge the overflow state of each hot aggregate bin.

[0027] 2. The method of the present invention is easy to operate and has good use effects. An overflow buffer bin is installed on each hot aggregate bin; secondly, the detection of the material level sensor and the acquisition of the overflow coefficient are carried out, and finally, the overflow state of the hot aggregate bin is judged, so as to obtain that the overflow state of the hot aggregate bin is normal fluctuation, general fluctuation, large fluctuation or significant fluctuation.

[0028] 3. When the overflow state of the hot aggregate bin is normal fluctuation, the hot aggregate bin continues to work; when the overflow state of the hot aggregate bin is general fluctuation, large fluctuation or significant fluctuation, the controller controls the alarm to sound, indicating that there is an aggregate gradation variation in the hot aggregate bin, so that it is convenient for construction personnel to take measures to control the aggregate gradation within a reasonable mix ratio curve range and minimize the overflow to the greatest extent.

[0029] In summary, the method steps of the present invention are simple and reasonably designed, accurately judge the overflow state of each hot material bin, so as to facilitate construction personnel to take measures to control the accuracy of aggregate gradation.

[0030] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the present invention.

[0032] Figure 2 is a structural schematic diagram of the overflow buffer bin of the present invention.

[0033] Figure 3 is a flow block diagram of the present invention.

[0034] Description of the reference numerals in the drawings:

[0035] 1 - hot material bin; 2 - the i-th discharging component; 2-1 - the i-th upper screw conveyor;

[0036] 2-2 - the i-th conveying circular pipe; 2-2-1 - the i-th discharging port; 3 - the i-th upper flexible connecting pipe;

[0037] 4 - the i-th overflow buffer bin; 5 - the i-th sampling component; 5-1 - the i-th horizontal circular pipe;

[0038] 5-1-1 - the i-th material taking port; 5-2 - the i-th lower screw conveyor; 5-3 - the i-th sampling pipe;

[0039] 6 - the i-th first weighing sensor; 6-1 - the i-th base; 7 - the i-th upper discharging channel;

[0040] 7-1 - the i-th butterfly valve; 8 - the i-th flexible connecting pipe; 9 - the i-th lower discharging channel;

[0041] 10 - second weighing sensor; 11 - sand and gravel weighing hopper; 12 - sand and gravel weighing hopper discharging door;

[0042] 14 - the i-th hot material bin discharging door; 15 - the i-th low level sensor;

[0043] 16 - the i-th high level sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] As Figures 1 to 3 shown, an aggregate gradation variation analysis and judgment method, a plurality of hot material bins are arranged in the hot material bin 1, and the bottoms of the plurality of hot material bins are connected to the sand and gravel weighing hopper 11. The method includes the following steps:

[0045] Step 1: Install an overflow buffer bin on the hot material bin:

[0046] Step 101: Denote multiple hot material bins as the 1st hot material bin, …, the ith hot material bin, …, the Ith hot material bin in ascending order of the aggregate particle sizes they hold; where both i and I are positive integers, and 1 ≤ i ≤ I; a ith low level sensor 15 and a ith high level sensor 16 are arranged in the ith hot material bin;

[0047] Step 102: Arrange a ith overflow buffer bin 4 on the ith hot material bin, and arrange a ith discharging component 2 at the top of the ith hot material bin; where the number of the overflow buffer bins 4 is the same as the number of the hot material bins, and the ith discharging component 2 communicates with the ith overflow buffer bin 4;

[0048] Step 103: Install a ith base 6-1 on the ith hot material bin, and arrange a ith weighing sensor 6 on the ith base 6-1;

[0049] Step 104: Connect the bottom of the ith overflow buffer bin 4 to a connecting sand and gravel weighing hopper 11 through a ith upper feeding channel 7 and a ith lower feeding channel 9; where a ith flexible connecting pipe 8 is arranged between the ith upper feeding channel 7 and the ith lower feeding channel 9, and a butterfly valve 7-1 is arranged on the ith upper feeding channel 7;

[0050] Step Two: Detection of the level sensors:

[0051] During the operation of the ith hot material bin and the connecting sand and gravel weighing hopper 11, the ith high level sensor 16 performs real-time detection on the level of the ith hot material bin, and the ith low level sensor 15 performs real-time detection on the level of the ith hot material bin;

[0052] Step Three: Obtaining the overflow coefficient:

[0053] Step 301: When the ith high level sensor 16 detects that the level of the ith hot material bin reaches the high level, convey the overflow material in the ith hot material bin to the ith overflow buffer bin 4 through the discharging component 2;

[0054] Step 302: During the process of conveying the overflow material in the ith hot material bin to the ith overflow buffer bin 4, the ith weighing sensor 6 performs real-time detection on the weight of the overflow material in the ith overflow buffer bin 4 until the overflow judgment set time is reached, and obtain the overflow weight Q of the ith hot material bin within the overflow judgment set time i ; where the value of the overflow judgment set time is 10 min

[0055] Step 303: According to the formula obtain the overflow coefficient λ of the ith hot material bin i; where A i represents 10% of the set amount of aggregate in the i-th hot material bin;

[0056] Step 4: Judging the overflow state of the hot material bin:

[0057] When it is judged that 0 < λ i ≤ 0.25, the aggregate in the i-th hot material bin fluctuates normally, and the i-th hot material bin continues to work;

[0058] When it is judged that 0.25 < λ i ≤ 0.5, the aggregate in the i-th hot material bin fluctuates generally; when it is judged that 0.5 < λ i ≤ 0.75, the aggregate in the i-th hot material bin fluctuates greatly; when it is judged that 0.75 < λ i ≤ 1, the aggregate in the i-th hot material bin fluctuates significantly, and the controller controls the alarm to give an alarm, indicating that there is a variation in the aggregate gradation in the i-th hot material bin.

[0059] In this embodiment, in step 301, the overflow material in the i-th hot material bin is conveyed to the i-th overflow buffer bin 4 through the discharging component 2, and the specific process is as follows:

[0060] Operate the i-th upper screw conveyor 2-1 to work. The i-th upper screw conveyor 2-1 conveys the aggregate in the i-th hot material bin through the i-th discharging port 2-2-1 via the i-th conveying circular pipe 2-2; the aggregate in the i-th conveying circular pipe 2-2 enters the i-th overflow buffer bin 4 through the i-th upper flexible connection pipe 3.

[0061] In this embodiment, when it is necessary to take a sample from the i-th overflow buffer bin 4, the specific process is as follows:

[0062] Operate the i-th lower screw conveyor 5-1 to work. The i-th lower screw conveyor 5-1 conveys the overflow material in the i-th overflow buffer bin 4 through the i-th material taking port 5-5-1 via the i-th lower screw conveyor 5-2 to the outside of the i-th overflow buffer bin 4, and then takes a sample through the i-th sampling pipe 5-3.

[0063] In this embodiment, when it is necessary to compensate the overflow material in the i-th overflow buffer bin 4 to the sand and gravel weighing hopper 11, control the i-th butterfly valve 7-1 to open, and compensate the overflow material in the i-th overflow buffer bin 4 to the sand and gravel weighing hopper 11 through the i-th upper discharging channel 7 and the i-th lower discharging channel 9.

[0064] In this embodiment, during actual use, the i-th high level sensor 16, the i-th low level sensor 15 and the i-th first weighing sensor 6 are all connected to the controller, and the butterfly valve 7-1 is controlled by the controller.

[0065] In this embodiment, the i-th low material level sensor 15 and the i-th high material level sensor 16 can refer to the UZK41ACB350 material level sensor.

[0066] In this embodiment, a second weighing sensor 10 is provided on the sand and gravel weighing hopper 11 to weigh the weight of the aggregate in the sand and gravel weighing hopper 11.

[0067] In this embodiment, the first weighing sensor 6 can refer to the 3410-500 weighing sensor, and the second weighing sensor 10 can refer to the 3410-2000 weighing sensor.

[0068] In this embodiment, during actual use, the i-th hot material bin discharge door 14 is opened, and the aggregate in the i-th hot material bin enters the sand and gravel weighing hopper 11 through the i-th hot material bin discharge door 14 until the weight of the aggregate in the sand and gravel weighing hopper 11 meets the construction requirements, then the i-th hot material bin discharge door 14 is closed, and the sand and gravel weighing hopper discharge door 12 is opened for discharging.

[0069] In this embodiment, a flexible connecting pipe is also used to connect between the bottom of the i-th hot material bin and the top of the sand and gravel weighing hopper 11.

[0070] In this embodiment, it should be noted that the set amount of aggregate in the i-th hot material bin is set according to the construction requirements.

[0071] In this embodiment, it should be noted that the overflow state of each hot material bin is accurately judged and quantified, and the mix ratio currently used in production is precisely adjusted according to the quantified parameters, so that the production mix ratio used is closer to the actual situation of the existing material source; or a prompt is given due to excessive fluctuations in the material source, so that the overflow amount of the equipment is reduced and energy waste is reduced; the mix ratio is scientifically guided by the fluctuation data in the laboratory, so that the mix ratio is closer to the actual gradation of the material source; a warning is given when the material source fluctuates too much, etc.

[0072] In summary, the method steps of the present invention are simple and reasonably designed, and the overflow state of each hot material bin is accurately judged, so as to facilitate the construction personnel to take measures to control the accuracy of the aggregate gradation.

[0073] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for analyzing and judging aggregate gradation variation, characterized in that, A plurality of hot material bins are arranged in the hot material bin (1), and the bottoms of the plurality of hot material bins are connected to the sand and gravel weighing hopper (11). The method includes the following steps: Step 1: Install an overflow buffer bin on the hot material bin: Step 101: Denote the plurality of hot material bins as the 1st hot material bin,..., the ith hot material bin,..., the Ith hot material bin in ascending order of the aggregate particle sizes they contain; where both i and I are positive integers, and 1 ≤ i ≤ I; a ith low level sensor (15) and a ith high level sensor (16) are arranged in the ith hot material bin; Step 102: Arrange a ith overflow buffer bin (4) on the ith hot material bin, and arrange a ith discharging component (2) at the top of the ith hot material bin; where the number of overflow buffer bins is the same as the number of hot material bins, and the ith discharging component (2) communicates with the ith overflow buffer bin (4); Step 103: Install a ith base (6-1) on the ith hot material bin, and arrange a ith weighing sensor (6) on the ith base (6-1); Step 104: Connect the bottom of the ith overflow buffer bin (4) to the sand and gravel weighing hopper (11) through a ith upper feeding channel (7) and a ith lower feeding channel (9); where a ith flexible connection pipe (8) is arranged between the ith upper feeding channel (7) and the ith lower feeding channel (9), and a butterfly valve (7-1) is arranged on the ith upper feeding channel (7); Step 2: Detection of the level sensor: During the operation of the ith hot material bin and the sand and gravel weighing hopper (11), the ith high level sensor (16) detects the level of the ith hot material bin in real time, and the ith low level sensor (15) detects the level of the ith hot material bin in real time; Step 3: Obtaining the overflow coefficient: Step 301: When the ith high level sensor (16) detects that the level of the ith hot material bin reaches the high level, convey the overflow in the ith hot material bin to the ith overflow buffer bin (4) through the discharging component (2); Step 302: During the process of conveying the overflow material in the i-th hot material bin to the i-th overflow buffer bin (4), the i-th weighing sensor (6) detects the weight of the overflow material in the i-th overflow buffer bin (4) in real time until the set overflow judgment time is reached, and obtains the overflow weight Q of the i-th hot material bin within the set overflow judgment time. i Among them, the value of the set overflow judgment time is 10 min. Step 303. According to the formula obtain the overflow coefficient λ of the i-th hot material bin i ; where A i represents 10% of the set dosage of the aggregate in the i-th hot material bin; Step 4: Judgment of the overflow state of the hot material bin: Judge 0 < λ i ≤ 0.25, the aggregate of the i-th hot aggregate bin fluctuates normally, and the i-th hot aggregate bin continues to work; Judge that 0.25 < λ i ≤ 0.5, the aggregate in the i-th hot aggregate bin generally fluctuates; Judge that 0.5 < λ i ≤ 0.75, the aggregate in the i-th hot aggregate bin fluctuates greatly; Judge that 0.75 < λ i ≤ 1, the aggregate in the i-th hot aggregate bin fluctuates significantly, and the controller controls the alarm to alarm, indicating that there is aggregate gradation variation in the i-th hot aggregate bin.

2. The method for analyzing and judging the variation of aggregate gradation according to claim 1, characterized in that: The process of conveying the overflow in the ith hot material bin to the ith overflow buffer bin (4) through the ith discharging component (2) in Step 301 is as follows: Operate the ith upper screw conveyor (2-1) to work. The ith upper screw conveyor (2-1) conveys the aggregate in the ith hot material bin through the ith discharging port (2-2-1) and the ith conveying round pipe (2-2); the aggregate in the ith conveying round pipe (2-2) enters the ith overflow buffer bin (4) through the ith upper flexible connection pipe (3).

3. A method for analyzing and judging the variation of aggregate gradation according to claim 1, characterized in that: When it is necessary to take a sample from the ith overflow buffer bin (4), the specific process is as follows: Operate the ith lower screw conveyor (5-1) to work. The ith lower screw conveyor (5-1) conveys the overflow in the ith overflow buffer bin (4) through the ith material taking port (5-5-1) and the ith lower screw conveyor (5-2) outside the ith overflow buffer bin (4), and then takes a sample through the ith sampling pipe (5-3).

4. A method for analyzing and judging the variation of aggregate gradation according to claim 1, characterized in that: When it is necessary to compensate the overflow material in the i-th overflow buffer bin (4) to the sand and gravel weighing hopper (11), control the i-th butterfly valve (7-1) to open, and compensate the overflow material in the i-th overflow buffer bin (4) to the sand and gravel weighing hopper (11) through the i-th upper feeding channel (7) and the i-th lower feeding channel (9).

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