A blanking structure and a low-bed semi-trailer facilitating unloading

Abstract

The present invention relates to the field of special semi-trailers, and particularly to a blanking structure and a low-bed semi-trailer facilitating unloading, including: a bottom plate, a feeding part including a plurality of material guiding grooves and augers, a blanking part including a blanking slope and a blanking door, a lifting part for lifting the blanking part, a fence arranged around the bottom plate, a monitoring module for obtaining information such as blanking speed, material humidity, average particle size of the material, lateral pressure of the material, and material pressure, and a control module for determining a corresponding blanking mode for a first blanking period and a second blanking period according to a blanking evaluation value and determining whether the operation of the blanking structure meets a preset standard according to the blanking speed, thereby improving the unloading speed and safety of the low-bed semi-trailer during the transportation of sand.

Description

Technical Field

[0001] The present invention relates to the field of special semi-trailers, and in particular to a blanking structure and a low-bed semi-trailer facilitating unloading. Background Art

[0002] A semi-trailer is a large truck. A semi-trailer (also known as a towing vehicle) has the advantages of a large load capacity, a long body length, flexible turning, high speed, and sufficient power, and has a wide application basis in the fields of sand mining and sand transportation.

[0003] Chinese Patent Publication No. CN112455311A discloses a self-unloading semi-trailer. By adopting a bent design for the web of the longitudinal beam and a perpendicular design for the middle part of the web and the lower wing plate, it is ensured to improve the structural strength of the longitudinal beam without adding extra welding processes. The carriage is designed in a tank shape, and front columns, middle columns, and rear columns are designed on the outer side of the carriage, which can improve the anti-impact deformation ability of the carriage and the connection strength between the carriage and the frame. At the same time, by designing a hidden opening and closing self-locking mechanism, it is realized that after the rear door is closed, the opening and closing self-locking mechanism can be accommodated through the cavity, achieving a hidden design, which is safer to use and has a better dust-proof effect; in addition, the cooperation of the lock plate and the clamping plate can realize the self-locking function, and thus the rear door is more reliable after being closed.

[0004] However, when unloading the materials of this self-unloading vehicle, since the state of the sand before unloading cannot be grasped, it is easy to cause unloading blockage or unloading residue, and there are relatively large potential safety hazards during the artificial interference process. Summary of the Invention

[0005] Therefore, the present invention provides a blanking structure and a low-bed semi-trailer facilitating unloading to overcome the problems in the prior art that the state of the sand before unloading cannot be grasped, which is easy to cause unloading blockage or unloading residue, and potential safety hazards.

[0006] To achieve the above object, on the one hand, the present invention provides a blanking structure, including:

[0007] A bottom plate;

[0008] A material guiding part, which is arranged above the bottom plate and includes a support frame hinged to one end of the bottom plate, and a plurality of material guiding grooves arranged on the upper side of the support frame along the discharging direction. Among them, a screw conveyor is arranged inside the material guiding groove, bearing seats are arranged near both ends of the screw conveyor, and a driving motor is arranged at one end of the screw conveyor;

[0009] A blanking part, which is arranged at the end of the material guiding part and includes a blanking slope arranged at the end of the material guiding groove and a blanking door arranged at the output end of the blanking slope. Among them, the blanking door is controlled to be opened and closed by a first hydraulic rod;

[0010] A lifting part, which is arranged between the bottom plate and the material guiding part, includes a second hydraulic rod arranged at one end far away from the blanking part and a hydraulic pump for driving the second hydraulic rod. One end of the second hydraulic rod is connected to the support framework, and the other end of the second hydraulic rod is connected to a hydraulic rod base arranged on the bottom plate.

[0011] A fence, which is arranged around the bottom plate;

[0012] A monitoring module, which includes an unloading acquisition unit for obtaining the blanking speed, a humidity acquisition unit for obtaining the material humidity information, a particle size acquisition unit for obtaining the average particle size of the material, a first pressure acquisition unit arranged at the bottom of the side wall of the fence for obtaining the lateral pressure of the material, and a second pressure acquisition unit arranged at the bottom of the material guiding groove for obtaining the material pressure;

[0013] A control module, which is respectively connected to the monitoring module, the material guiding part and the lifting part, and is used for determining the corresponding blanking modes of the first blanking period and the second blanking period according to the blanking evaluation value, and for determining whether the operation of the blanking structure meets the preset standard according to the blanking speed. Among them,

[0014] The period from the start of blanking to the stop of blanking when only the blanking door is opened is recorded as the first blanking period, and the period from the end of the first blanking period to the emptying of the material is recorded as the second blanking period.

[0015] Furthermore, the blanking evaluation value is jointly determined by the humidity of the material, the average particle size of the material and the lateral pressure of the material measured by the first pressure acquisition unit.

[0016] Furthermore, the control module determines the blanking modes of the first blanking period and the second blanking period based on the blanking evaluation value. Among them,

[0017] If the blanking evaluation value is less than the first preset blanking evaluation value, the first blanking mode is used to complete the blanking of the first blanking period and the second blanking mode is used to complete the blanking of the second blanking period;

[0018] If the blanking evaluation value is greater than or equal to the first preset blanking evaluation value and less than the second preset blanking evaluation value, the first blanking mode is used to complete the blanking of the first blanking period and the third blanking mode is used to complete the blanking of the second blanking period;

[0019] If the blanking evaluation value is greater than or equal to the second preset blanking evaluation value and less than the third preset blanking evaluation value, the third blanking mode is used to complete the blanking of the first blanking period and the second blanking period;

[0020] If the blanking evaluation value is greater than or equal to the third preset blanking evaluation value, use the third blanking mode to complete the blanking in the first blanking period and use the fourth blanking mode to complete the blanking in the second blanking period;

[0021] Among them, the first blanking mode is to only open the blanking door,

[0022] The second blanking mode is to open the blanking door and lift the material guiding part to a preset lifting angle,

[0023] The third blanking mode is to open the blanking door and drive each auger at a preset power,

[0024] The fourth blanking mode is to open the blanking door, lift the material guiding part to a preset lifting angle, and drive each auger at a preset power.

[0025] Further, when the control module determines that the operation of the blanking structure does not meet the preset standard based on the blanking speed in the fourth blanking mode, increase the operation power of each auger according to the difference between the first preset blanking speed and the blanking speed, or, secondarily determine the reason why the operation of the blanking structure does not meet the preset standard according to the material pressure.

[0026] Further, the control module is provided with several power adjustment methods for adjusting the operation power of each auger based on the difference between the first preset blanking speed and the blanking speed, and the adjustment range of the operation power of each auger for each power adjustment method is different.

[0027] Further, the reasons for which the control module secondarily determines that the operation of the blanking structure does not meet the preset standard based on the material pressure include:

[0028] The operation power of each auger does not meet the standard and increase the operation power of each auger according to the difference between the preset material pressure threshold and the material pressure, and, the preset lifting angle does not meet the standard and increase the preset lifting angle according to the difference between the material pressure and the preset material pressure threshold.

[0029] Further, the increase amplitude of the preset lifting angle is positively correlated with the material pressure difference; the material pressure difference is the difference between the material pressure and the preset material pressure threshold.

[0030] Further, the control module corrects the determination criteria for the blanking modes in the first blanking period and the second blanking period according to the difference between the preset average rate threshold and the average rate of discharging under the first preset condition, where the determination criteria include the first preset blanking evaluation value, the second preset blanking evaluation value, and the third preset blanking evaluation value;

[0031] The first preset condition is that the average discharging rate is less than a preset average rate threshold.

[0032] On the other hand, the present invention also provides a low-bed semi-trailer facilitating discharging, and the low-bed semi-trailer includes the blanking structure.

[0033] Further, the low-bed semi-trailer further includes a discharging movement determination module, which drives the semi-trailer to travel in the reverse direction of the blanking direction at a first preset moving speed when the blanking speed of the blanking structure is greater than a first preset blanking speed.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] The blanking structure of the present invention is provided with a material guiding part with a material guiding groove and a screw conveyor, a lifting part, a monitoring module for obtaining the blanking speed, the material humidity information, the average particle size of the material, the lateral pressure of the material and the material pressure, and can determine the fluidity state of the material to be blanked according to the material state, so as to determine the corresponding blanking strategy based on the state of the material, avoiding the problems of remaining or blocking during blanking.

[0036] Further, the present invention jointly determines a blanking evaluation value through the humidity of the material, the average particle size of the material and the lateral pressure of the material measured by the first pressure acquisition unit, accurately reflecting the blanking state of the material.

[0037] Further, the present invention sets corresponding blanking strategies for materials with different blanking difficulties. When the fluidity of the material is good, the method of opening the blanking door and lifting is used. When the fluidity of the material is poor, blanking is carried out in the form of a screw conveyor plus lifting, so as to realize the one-time emptying of material blanking.

[0038] Further, when the present invention determines that the operation of the blanking structure does not meet the preset standard according to the blanking speed, it precisely adjusts the rotation speed of the screw conveyor or the lifting angle, so as to ensure the blanking speed.

[0039] Further, the present invention installs the blanking structure on a low-bed semi-trailer to realize the trailer for carrying materials and rapid discharging.

[0040] Further, the low-bed semi-trailer of the present invention also starts to travel when the blanking speed is greater than the first preset blanking speed, ensuring the smooth blanking of the material and thus ensuring the blanking efficiency. Description of the Drawings

[0041] Figure 1 It is a schematic structural diagram of the blanking structure according to an embodiment of the present invention;

[0042] Figure 2Flow chart of the present invention's embodiment for determining the blanking modes of the first blanking period and the second blanking period based on the blanking evaluation value;

[0043] Figure 3 Flow chart of the present invention's embodiment for determining whether the operation of the blanking structure meets the preset standard based on the blanking speed;

[0044] Figure 4 Flow chart of the present invention's embodiment for re - determining the reason why the operation of the blanking structure does not meet the preset standard based on the material pressure;

[0045] Figure 5 Schematic connection diagram of the control module in the present invention's embodiment;

[0046] In the figure:

[0047] 1, base plate; 21, support framework; 22, material guiding trough; 23, auger; 24, bearing seat; 25, driving motor; 31, blanking slope; 32, blanking door; 33, first hydraulic rod; 41, second hydraulic rod; 42, hydraulic rod base; 5, fence. Detailed implementation manners

[0048] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] It should be noted that the data in this embodiment are all obtained through comprehensive analysis and evaluation of the historical detection data of the previous three months before this blanking by the control module of the present invention and the corresponding historical blanking results. Those skilled in the art can understand that the determination method of the present invention's blanking structure for a single above - mentioned parameter can be to select the value with the highest proportion according to the data distribution as the preset standard parameter, use weighted summation to obtain the value as the preset standard parameter, substitute each historical data into a specific formula and use the value obtained by the formula as the preset standard parameter or other selection methods, as long as it satisfies that the system of the present invention can clearly define different specific situations in the single - item determination process through the obtained values.

[0050] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and do not limit the protection scope of the present invention.

[0051] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, they are respectively the structural schematic diagram of the blanking structure of the present invention; the flowchart for determining the blanking modes of the first blanking period and the second blanking period based on the blanking evaluation value; the flowchart for determining whether the operation of the blanking structure meets the preset standard based on the blanking speed; the flowchart for secondarily determining the reason why the operation of the blanking structure does not meet the preset standard based on the material pressure; the connection structural schematic diagram of the control module.

[0052] On the one hand, an embodiment of the present invention provides a blanking structure, including:

[0053] A bottom plate 1;

[0054] A material guiding part, which is arranged above the bottom plate 1 and includes a support framework 21 hinged to one end of the bottom plate 1, and a plurality of material guiding grooves 22 arranged on the upper side of the support framework 21 along the discharging direction. Among them, a screw conveyor 23 is arranged inside the material guiding groove 22, bearing seats 24 are arranged near both ends of the screw conveyor 23, and a driving motor 25 is arranged at one end of the screw conveyor;

[0055] A blanking part, which is arranged at the end of the material guiding part and includes a blanking slope 31 arranged at the end of the material guiding groove and a blanking door 32 arranged at the output end of the blanking slope. Among them, the blanking door 32 is controlled to open and close by a first hydraulic rod 33;

[0056] A lifting part, which is arranged between the bottom plate 1 and the material guiding part and includes a second hydraulic rod 41 arranged at one end far from the blanking part and a hydraulic pump for driving the second hydraulic rod 41. Among them, one end of the second hydraulic rod 41 is connected to the support framework 21, and the other end of the second hydraulic rod 41 is connected to a hydraulic rod base 42 arranged on the bottom plate 1;

[0057] A fence 5, which is arranged around the bottom plate 1;

[0058] A monitoring module, which includes an unloading acquisition unit for obtaining the blanking speed, a humidity acquisition unit for obtaining the material humidity information, a particle size acquisition unit for obtaining the average particle size of the material, a first pressure acquisition unit arranged at the bottom of the side wall of the fence for obtaining the lateral pressure of the material, and a second pressure acquisition unit arranged at the bottom of the material guiding groove for obtaining the material pressure;

[0059] A control module, which is respectively connected to the monitoring module, the material guiding part and the lifting part, and is used for determining the corresponding blanking modes of the first blanking period and the second blanking period according to the blanking evaluation value, and for determining whether the operation of the blanking structure meets the preset standard according to the blanking speed. Among them,

[0060] The period from the start of blanking to the stop of blanking when only the blanking door is opened is recorded as the first blanking period, and the period from the end of the first blanking period to the emptying of the material is recorded as the second blanking period.

[0061] Specifically, the material is sand, such as river sand.

[0062] Specifically, the control module is, for example, a CPU or a PLC, and is not specifically limited. It only needs to determine and output corresponding results according to the input instructions.

[0063] Specifically, the support skeleton is a steel structure, and is not specifically limited. It only needs to satisfy that no structural damage occurs under the condition of full-load material load.

[0064] Specifically, the unloading acquisition unit is, for example, an impact plate flow rate set at the outlet of the blanking door, or a weighing scale set between the material guiding part and the bottom plate. It can be understood that the weighing scale determines the blanking speed by obtaining the change in weight and the corresponding blanking time.

[0065] Specifically, the humidity acquisition unit is, for example, a humidity sensor, and is not specifically limited. It only needs to satisfy that the humidity information of the material can be obtained.

[0066] Specifically, the particle size acquisition unit is, for example, a laser particle size analyzer, and is not specifically limited, and is used to obtain the particle size information of the material.

[0067] Specifically, the first pressure acquisition unit is, for example, a pressure sensor, and is not specifically limited, and is used to obtain the lateral pressure of the material. It can be understood that the deposition state of the material after transportation can be obtained by setting a pressure sensor at the bottom of the side wall of the fence to obtain the lateral pressure of the material.

[0068] Specifically, the second pressure acquisition unit is, for example, a pressure sensor, and is not specifically limited, and is used to obtain the material pressure between the auger and the material guiding trough.

[0069] Specifically, the blanking evaluation value is determined by the following formula:

[0070]

[0071] In the formula, α is the humidity evaluation coefficient, and α = 0.14 is set; T is the humidity of the material, T0 is the preset humidity of the material, and T0 = 1.5% is set; β is the particle size evaluation coefficient, and β = 0.86 is set; φ is the average particle size of the material, φ0 is the preset average particle size, and φ0 = 0.25 mm is set; γ is the transportation evaluation coefficient, and γ = 1.08 is set; P is the lateral pressure of the material measured by the first pressure acquisition unit, P0 is the lateral pressure threshold, and P0 = 5500 N is set.

[0072] Specifically, the control module determines the blanking modes of the first blanking period and the second blanking period based on the blanking evaluation value, where

[0073] If the blanking evaluation value is less than the first preset blanking evaluation value of 1.48, the first blanking mode is used to complete the blanking in the first blanking period and the second blanking mode is used to complete the blanking in the second blanking period;

[0074] If the blanking evaluation value is greater than or equal to the first preset blanking evaluation value and less than the second preset blanking evaluation value of 2.25, the first blanking mode is used to complete the blanking in the first blanking period and the third blanking mode is used to complete the blanking in the second blanking period;

[0075] If the blanking evaluation value is greater than or equal to the second preset blanking evaluation value and less than the third preset blanking evaluation value of 4.27, the third blanking mode is used to complete the blanking in the first blanking period and the second blanking period;

[0076] If the blanking evaluation value is greater than or equal to the third preset blanking evaluation value, the third blanking mode is used to complete the blanking in the first blanking period and the fourth blanking mode is used to complete the blanking in the second blanking period;

[0077] Among them, the first blanking mode is to only open the blanking door,

[0078] The second blanking mode is to open the blanking door and lift the material guiding part to a preset lifting angle,

[0079] The third blanking mode is to open the blanking door and drive each auger at a preset power,

[0080] The fourth blanking mode is to open the blanking door, lift the material guiding part to a preset lifting angle and drive each auger at a preset power,

[0081] Among them, the preset lifting angle is set to 25°, and the preset power is set to 2.2Kw. It can be understood that the first preset blanking evaluation value, the second preset blanking evaluation value, the third preset blanking evaluation value, the preset lifting angle and the preset power are the results obtained through preliminary experimental verification before the operation of this blanking structure. The first preset blanking evaluation value, the second preset blanking evaluation value, and the third preset blanking evaluation value can be adjusted according to specific usage conditions, as long as it satisfies that the blanking structure of the present invention can clearly define different specific situations in the single-item determination process through the obtained numerical values.

[0082] Specifically, the control module determines whether the operation of the blanking structure meets the preset standard based on the blanking speed in the fourth blanking mode, where,

[0083] If the blanking speed is less than the first preset blanking speed of 0.71t / s, the control module determines that the operation of the blanking structure does not meet the preset standard, and increases the operating power of each auger according to the difference between the first preset blanking speed and the blanking speed;

[0084] If the blanking speed is greater than or equal to the first preset blanking speed and less than the second preset blanking speed of 1.45 t / s, the control module determines that the operation of the blanking structure does not meet the preset standard, and secondly determines the reason why the operation of the blanking structure does not meet the preset standard according to the material pressure;

[0085] If the blanking speed is greater than or equal to the second preset blanking speed, the control module determines that the operation of the blanking structure meets the preset standard, and completes the blanking in this blanking mode.

[0086] Specifically, the control module is provided with several power adjustment methods for adjusting the operating power of each auger based on the difference between the first preset blanking speed and the blanking speed. Among them,

[0087] The first power adjustment method is that the control module uses the first preset adjustment coefficient of 1.03 to determine the adjusted operating power of each auger by multiplying with the operating power of each auger before adjustment, and switches the operating power of each auger to the adjusted operating power; the first power adjustment method satisfies that the adjustment difference is less than the first preset adjustment difference of 0.11 t / s;

[0088] The second power adjustment method is that the control module uses the second preset adjustment coefficient of 1.08 to determine the adjusted operating power of each auger by multiplying with the operating power of each auger before adjustment, and switches the operating power of each auger to the adjusted operating power; the second power adjustment method satisfies that the adjustment difference is greater than or equal to the first preset adjustment difference and less than the second preset adjustment difference of 0.25 t / s;

[0089] The third power adjustment method is that the control module uses the third preset adjustment coefficient of 1.17 to determine the adjusted operating power of each auger by multiplying with the operating power of each auger before adjustment, and switches the operating power of each auger to the adjusted operating power; the third power adjustment method satisfies that the adjustment difference is greater than or equal to the second preset adjustment difference;

[0090] The adjustment difference is the difference between the first preset blanking speed and the blanking speed.

[0091] Specifically, the control module secondly determines the reason why the operation of the blanking structure does not meet the preset standard based on the material pressure,

[0092] Under the condition that the material pressure is less than the preset material pressure threshold of 4800 N, the reason for the secondary determination not meeting the preset standard is that the operating power of each auger does not meet the standard, and the operating power of each auger is increased according to the difference between the preset material pressure threshold and the material pressure;

[0093] Under the condition that the material pressure is less than the preset material pressure threshold, it is determined for the second time that the reason for not meeting the preset standard is that the preset lifting angle does not meet the standard, and the preset lifting angle is increased according to the difference between the material pressure and the preset material pressure threshold.

[0094] Specifically, the increase amplitude of the preset lifting angle is positively correlated with the material pressure difference; the material pressure difference is the difference between the material pressure and the preset material pressure threshold. It can be understood that the greater the material pressure difference, the greater the increase amplitude of the preset lifting angle. The positive correlation is, for example, a linear positive correlation, and the coefficient of the linear positive correlation is not specifically limited and can be adjusted according to the usage situation, as long as it satisfies the positive correlation.

[0095] Specifically, under the first preset condition, the control module corrects the determination criteria for the feeding modes of the first feeding period and the second feeding period according to the difference between the preset average rate threshold of 1.40 t / s and the average rate of discharging materials, where the determination criteria include the first preset feeding evaluation value, the second preset feeding evaluation value, and the third preset feeding evaluation value;

[0096] The first preset condition is that the average rate of discharging materials is less than the preset average rate threshold.

[0097] Specifically, the correction amplitude of the determination criteria is positively correlated with the correction difference. The correction difference is the difference between the preset average rate threshold and the average rate of discharging materials. It can be understood that the greater the correction difference, the greater the correction amplitude of the determination criteria. The positive correlation is, for example, a linear positive correlation, and the coefficient of the linear positive correlation is less than 1, which is not specifically limited and can be adjusted according to the usage situation, as long as it satisfies the positive correlation.

[0098] On the other hand, in an embodiment of the present invention, a low-bed semi-trailer facilitating discharging is provided, and the above-mentioned feeding structure is arranged on the trailer.

[0099] Specifically, the low-bed semi-trailer is further provided with a discharging movement determination module, which drives the semi-trailer to travel in the opposite direction of the feeding direction at a first preset moving speed of 0.8 m / s when the feeding speed of the feeding structure is greater than a first preset feeding speed of 0.71 t / s.

[0100] Specifically, the discharging movement determination module is, for example, a PLC, which is not specifically limited, and only needs to determine and output corresponding results according to the input instructions.

[0101] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0102] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A material feeding structure, characterized in that: include: Base plate; The material guide part is arranged above the bottom plate, and comprises a support frame hingedly connected to one end of the bottom plate, and a plurality of material guide grooves arranged on the upper side of the support frame along the material discharging direction, wherein an auger is arranged inside the material guide groove, bearing seats are arranged near both ends of the auger, and a driving motor is arranged at one end of the auger; A material discharge portion, which is arranged at the end of the material guide portion, comprises a material discharge slope arranged at the end of the material guide trough, and a material discharge door arranged at the output end of the material discharge slope, wherein the material discharge door is controlled to be opened and closed by a first hydraulic rod; A lifting part, which is arranged between the bottom plate and the material guiding part, comprises a second hydraulic rod arranged at one end away from the material discharging part and a hydraulic pump for driving the second hydraulic rod, wherein one end of the second hydraulic rod is connected to the supporting frame, and the other end of the second hydraulic rod is connected to a hydraulic rod base arranged on the bottom plate; A fence, which is arranged around the bottom plate; A monitoring module, comprising an unloading acquisition unit for acquiring a material unloading speed, a humidity acquisition unit for acquiring material humidity information, a particle size acquisition unit for acquiring an average particle size of the material, a first pressure acquisition unit disposed at the bottom of the fence side wall for acquiring a lateral pressure of the material, and a second pressure acquisition unit disposed at the bottom of the guide trough for acquiring a material pressure; a control module, which is respectively connected to the monitoring module, the material guiding part and the lifting part, and is used to determine the corresponding material unloading mode of the first material unloading period and the second material unloading period according to the material unloading evaluation value, and to determine whether the operation of the material unloading structure meets the preset standard according to the material unloading speed, and to determine that the operation of the material unloading structure does not meet the preset standard when the material unloading speed is greater than or equal to the first preset material unloading speed and less than the second preset material unloading speed, and to secondarily determine the reason why the operation of the material unloading structure does not meet the preset standard according to the material pressure, The period from the start of unloading to the stop of unloading when only the unloading door is opened is recorded as the first unloading period, and the period from the end of the first unloading period to the emptying of materials is recorded as the second unloading period.

2. The blanking structure according to claim 1, characterized in that: The material discharge evaluation value is determined by the moisture of the material, the average particle size of the material, and the lateral pressure of the material measured by the first pressure acquisition unit.

3. The blanking structure according to claim 2, characterized in that: The control module determines the unloading mode of the first unloading period and the second unloading period based on the unloading evaluation value, wherein: If the material unloading evaluation value is less than the first preset material unloading evaluation value, the first material unloading mode is used to complete the material unloading in the first material unloading period, and the second material unloading mode is used to complete the material unloading in the second material unloading period; If the material unloading evaluation value is greater than or equal to the first preset material unloading evaluation value and less than the second preset material unloading evaluation value, the first material unloading mode is used to complete the material unloading in the first material unloading period and the third material unloading mode is used to complete the material unloading in the second material unloading period; If the material unloading evaluation value is greater than or equal to the second preset material unloading evaluation value and less than the third preset material unloading evaluation value, the third material unloading mode is used to complete the unloading of the first material unloading period and the second material unloading period; If the material unloading evaluation value is greater than or equal to the third preset material unloading evaluation value, the third material unloading mode is used to complete the unloading of the first material unloading period and the fourth material unloading mode is used to complete the unloading of the second material unloading period; Wherein, the first unloading mode is to open only the unloading door, The second unloading mode is to open the unloading door and lift the guide part to a preset lifting angle. The third unloading mode is to open the unloading door and drive each auger at a preset power. The fourth unloading mode is to open the unloading door, lift the material guiding part to a preset lifting angle, and drive each of the augers at a preset power.

4. The material removal structure according to claim 3, characterized in that: The control module is provided with several power adjustment methods for adjusting the operating power of each auger based on the difference between the first preset unloading speed and the unloading speed, and each power adjustment method has a different adjustment range for the operating power of each auger.

5. The material removal structure according to claim 4, characterized in that: The control module determines that the operation of the material unloading structure does not meet the preset standard based on the material pressure for the second time, and the reasons include: The operating power of each augers does not meet the standard and the operating power of each augers is increased according to the difference between the preset material pressure threshold and the material pressure; and the preset lifting angle does not meet the standard and the preset lifting angle is increased according to the difference between the material pressure and the preset material pressure threshold.

6. The material removal structure according to claim 5, characterized in that: The increase range of the preset lifting angle is positively correlated with the material pressure difference; the material pressure difference is the difference between the material pressure and the preset material pressure threshold.

7. The material removal structure according to claim 6, characterized in that: The control module amends the determination criteria of the unloading mode of the first unloading period and the second unloading period according to the difference between the preset average rate threshold and the average rate of unloading under the first preset condition, wherein the determination criteria include the first preset unloading evaluation value, the second preset unloading evaluation value and the third preset unloading evaluation value; The first preset condition is that the average rate of unloading is less than a preset average rate threshold.

8. A low-bed semi-trailer that is easy to unload, characterized in that: It comprises the blanking structure described in any one of claims 1 to 7.

9. The low-bed semi-trailer for easy unloading according to claim 8, characterized in that: It also includes a material unloading movement determination module, which drives the semi-trailer in the opposite direction of the material unloading direction at the first preset movement speed in response to the material unloading speed of the material unloading structure being greater than the first preset material unloading speed.

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