Gravel conveying system

Abstract

The invention relates to the technical field of powder discharging devices, and discloses a gravel conveying system which comprises a discharging hopper, the discharging hopper communicates with a storage cavity, and gravel is stored in the storage cavity; a discharging port is formed in the end, close to the bottom, of the discharging hopper, a conveying belt is arranged below the discharging port, the discharging hopper is used for conveying the gravel in the storage cavity to the conveying belt, and the conveying belt is used for conveying the gravel; a control valve is arranged on the discharge port, and the control valve is used for adjusting the opening degree of the discharge port; the gravel conveying device further comprises a control unit, the control unit is used for controlling the control valve to adjust the size of the discharging port and the conveying speed of the conveying belt, and the control unit adjusts the conveying speed of the gravel according to adjustment of the control valve and the conveying belt. The gravel conveying amount control device has the beneficial effect of being high in gravel conveying amount control precision.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel transport devices, and in particular to a sand and gravel conveying system. Background Art

[0002] In construction production, cement, sand and gravel and other materials are the main raw materials for concrete. With the continuous development of infrastructure construction and construction projects, the demand for sand and gravel materials for construction projects is increasing. In the construction production process, according to different construction needs, there are different requirements for parameters such as the particle size of sand and gravel. Therefore, after the sand and gravel raw materials are collected, they usually need to be processed secondary to meet the actual demand for sand and gravel in the construction production process. When performing secondary processing on sand and gravel, the collected sand and gravel raw materials are usually stored in a fixed location, and then transported to the corresponding location for processing in batches according to the processing requirements. When transporting sand and gravel, sand and gravel are usually transported by conveyor belts to improve the efficiency of sand and gravel transportation.

[0003] For example, the patent document with publication number CN110562697A discloses a sand and gravel conveying device, including a frame, an active roller, a driven roller, a tensioning assembly, a roller assembly, a driving assembly and a belt. The active roller and the driven roller are fixed at both ends of the frame by bearings, one high and one low, and are rotated. The driving assembly is fixed on the frame and drives the active roller to rotate. The belt is obliquely sleeved outside the active roller and the driven roller. Several groups of roller assemblies are fixed on the frame in sequence and lift the front and rear sides of the upper belt so that the upper belt is in the shape of a pocket with a sunken center. The tensioning assembly is fixed on both sides of one end of the frame close to the driven roller and adjusts the driven roller away from the active roller to tension the belt. Sand and gravel are transmitted by using a belt with a V-shaped pattern, and the roller assembly is used to support the belt so that it is in the shape of a pocket with a sunken center, thereby holding and transporting more sand and gravel to prevent sand and gravel from rolling off the belt.

[0004] Although the above technical scheme can realize the efficient transportation of sand and gravel and prevent sand and gravel from rolling during transportation; however, in the production and processing process, according to the requirements of different processing batches, the amount of sand and gravel transported usually needs to be quantitatively controlled to ensure that the amount of sand and gravel transported can meet the processing batch requirements. When transporting sand and gravel, the above technical scheme only continuously transports sand and gravel through conveyor belts, resulting in the inability to accurately control the amount of sand and gravel transported during transportation, resulting in a deviation between the amount of sand and gravel transported to the production and processing line and the actual demand, affecting the normal progress of production and processing. Summary of the invention

[0005] The present invention is intended to provide a sand and gravel conveying system to solve the technical problem in the prior art that the amount of sand and gravel conveyed cannot be accurately controlled when sand and gravel are transported.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sand and gravel conveying system, comprising a discharging hopper, the discharging hopper is connected to a storage chamber, and sand and gravel are stored in the storage chamber; the discharging hopper is provided with a discharging port near the bottom end, and a conveyor belt is provided below the discharging port, the discharging hopper is used to convey the sand and gravel in the storage chamber to the conveyor belt, and the conveyor belt is used to convey the sand and gravel; the discharging port is provided with a control unit, and the control unit is used to adjust the opening and closing size of the discharging port; and also includes a control unit, the control unit is used to control the control unit to adjust the size of the discharging port and the conveying speed of the conveyor belt, and the control unit adjusts the conveying speed of the sand and gravel according to the adjustment of the control unit and the conveyor belt.

[0007] The principle and advantages of this solution: When conveying sand and gravel, the sand and gravel to be processed are input into the discharge hopper and placed on the conveyor belt through the discharge port at the bottom of the discharge hopper. The conveyor belt conveys the sand and gravel placed in the discharge hopper to the designated location. When conveying sand and gravel through the discharge hopper and the conveyor belt, the control unit adjusts the discharge speed of the discharge hopper and the transmission speed of the conveyor belt so that the amount of sand and gravel conveyed per unit time matches the amount required for processing.

[0008] In this scheme, when sand and gravel are transported, the discharge speed of the discharging hopper and the conveying speed of the conveyor belt are controlled, so that during the transportation process, the amount of sand and gravel transported per unit time can be accurately controlled to ensure that the transported sand and gravel can match the actual production demand, avoid the deviation between the transported sand and gravel and the actual demand, and affect the normal production and processing; and ensure that the sand and gravel can be transported at a uniform speed when transported to the next processing procedure, to ensure that when the next processing procedure processes the sand and gravel, the input speed of the sand and gravel matches the processing speed of the sand and gravel, avoid the input speed of the sand and gravel is too fast, resulting in the next processing procedure unable to completely process the sand and gravel, affecting the processing effect of the sand and gravel, or the input speed of the sand and gravel is too slow, resulting in idling of the processing equipment, reducing the processing efficiency of the sand and gravel.

[0009] Preferably, as an improvement, the bottom of the discharge hopper is a closed end, and the discharge port is located on one side of the bottom of the discharge hopper. By opening the discharge port on one side of the bottom of the discharge hopper, when the sand and gravel are discharged through the discharge port, the sand and gravel can be directedly transported from one side of the discharge hopper to the conveyor belt, so as to avoid that when the sand and gravel are discharged through the discharge port, the sand and gravel quickly move toward the conveyor belt under the action of gravity and pressure, causing the sand and gravel to splash and splash around after falling on the conveyor belt, causing the sand and gravel to fall outside the conveyor belt; at the same time, by reducing the pressure when the sand and gravel are discharged, the pressure at the discharge port is reduced, so as to avoid excessive pressure at the discharge port, which makes it inconvenient to adjust the output at the discharge port.

[0010] Preferably, as an improvement, the discharge port is an arc-shaped opening. The discharge port is set to an arc shape, so that when the discharge port discharges sand and gravel, when there is sand and gravel accumulation at the bottom of the discharge port, there is still a gap at the top of the discharge port to discharge the sand and gravel, ensuring the smoothness of the discharge port when discharging sand and gravel.

[0011] Preferably, as an improvement, the control unit includes a control panel, the control panel is located on one side of the discharge port, the control panel covers the discharge port, and the control panel can move up and down in the height direction to adjust the size of the discharge port by covering the control panel outside the discharge port, so that when the control panel controls the size of the discharge port in the height direction, it can avoid the presence of sand and gravel in the discharge port to block it, and the opening size of the discharge port cannot be adjusted by the control unit; and the control panel is arranged on one side of the discharge port, so that when the control panel partially blocks the discharge port, the pressure of sand and gravel on the control panel can be reduced, thereby avoiding deformation and damage of the control panel due to long-term pressure on the control panel.

[0012] Preferably, as an improvement, a chute is provided at the corresponding position of the discharge hopper and the control board, and the control board is connected to the chute via a fixing rod. By arranging the chute on the discharge hopper and connecting it with the control board, when the control board moves up and down along the height direction on the discharge hopper, it can move in a directional manner under the positioning effect of the chute, thereby avoiding displacement of the control board during the movement process, which affects the control board's adjustment effect on the size of the discharge port.

[0013] Preferably, as an improvement, a driving member is provided on the fixing rod, and the driving member is used to drive the fixing rod to move along the extension direction of the slide slot. The driving member drives the control board to move, so that the control board can accurately and conveniently adjust the position, and after the control board moves to the specified position, the position can be fixed under the action of the driving member, so as to ensure the stability of the position of the control board after adjustment.

[0014] Preferably, as an improvement, a partition net is provided at the top of the discharge hopper, and the partition net completely covers the opening at the top of the discharge hopper, and the partition net is used to screen the sand and gravel delivered to the discharge hopper. By providing a partition net in the discharge hopper, the sand and gravel can be screened by the partition net first when they are input into the discharge hopper, so as to avoid the sand and gravel with too large particle size being directly input into the discharge hopper, resulting in the blockage of the discharge port when the discharge hopper discharges the sand and gravel, thereby affecting the normal discharge of the discharge hopper.

[0015] Preferably, as an improvement, the control unit also stores a plurality of preset values ​​of the conveyor belt speed and the opening and closing size of the control unit that match the sand and gravel conveying speed, and the control unit adjusts the conveyor belt and the control unit according to the preset values. By presetting a plurality of sand and gravel transport volume levels in the control unit, when it is necessary to adjust the conveying volume of sand and gravel per unit time, the corresponding conveyor belt conveying speed and the opening and closing size of the control unit can be directly selected according to the preset content of the control unit, thereby ensuring the accuracy of the sand and gravel conveying volume adjustment and avoiding the need to debug the conveyor belt speed and the opening and closing size of the control unit multiple times during the conveying process, which increases the workload of control and adjustment.

[0016] Preferably, as an improvement, it further includes a detection unit, the sand and gravel detection unit is used to detect the discharge flow rate of the sand and gravel discharge hopper, and the control unit is used to adjust the control unit according to the detection result of the detection unit. The actual conveying volume of sand and gravel during the conveying process is detected by the detection unit, and the control unit is controlled according to the detection result to ensure that the output flow rate of the discharge port matches the preset output flow rate of the opening and closing size of the control unit, avoid the output flow rate of the discharge port not matching the preset value, resulting in the conveying volume of sand and gravel matching the actual demand, and ensure the accuracy of the conveying volume of sand and gravel.

[0017] Preferably, as an improvement, the discharge hopper further includes an auxiliary part, which is used to assist in the output of the sand and gravel in the discharge hopper. By arranging the auxiliary part in the discharge hopper, the control part can promote the output of sand and gravel when there is a slight blockage in the discharge hopper, thereby ensuring the normal transportation of sand and gravel while avoiding the blockage caused by the deposition of sand and gravel in the discharge hopper, ensuring the smooth discharge of the discharge hopper, and reducing the maintenance cost of the discharge hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the sand and gravel conveying system in Example 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the discharge hopper structure in Example 1 of the present invention.

[0020] Figure 3 This is a schematic diagram of the discharge hopper structure in Example 2 of the present invention. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] The figure marks in the drawings of the specification include: a discharge hopper 1, a storage chamber 101, a discharge port 102, a chute 103, a conveyor belt 2, a control unit 3, a control panel 301, a fixing rod 302, a driving member 303, a partition net 4, a flow monitor 5, and a vibration roller 6.

[0023] Embodiment 1

[0024] As attached Figure 1 With attached Figure 2 As shown, a sand and gravel conveying system includes a discharge hopper 1, to which a storage chamber 101 is connected. The storage chamber 101 is used to store the sand and gravel to be conveyed. A conveyor belt 2 is provided below the discharge hopper 1. The discharge hopper 1 is used to put sand and gravel onto the conveyor belt 2. The conveyor belt 2 is used to transport the put sand and gravel to a designated processing area for processing.

[0025] The discharge hopper 1 is funnel-shaped, and the diameter of the discharge hopper 1 gradually narrows downward in the height direction, wherein the top of the discharge hopper 1 is connected to the storage chamber 101, and the storage chamber 101 and the discharge hopper 1 are stacked and distributed in the height direction, and the sand and gravel stored in the storage chamber 101 can move into the discharge hopper 1 under the action of gravity.

[0026] A discharge port 102 is provided at the bottom of the discharge hopper 1, and the discharge port 102 is used to discharge the sand and gravel in the discharge hopper 1. The discharge port 102 is located at one side of the bottom of the discharge hopper 1, and the discharge port 102 is an arc-shaped opening. Specifically, the bottom of the discharge hopper 1 is a closed end, and an arc-shaped opening connected to the inside of the discharge hopper 1 is provided at one side of the bottom of the discharge hopper 1, and the arc of the arc-shaped opening extends upward along the height direction. By opening a discharge port 102 on one side of the bottom of the discharge hopper 1, the sand and gravel can be directionally transported from one side of the discharge hopper 1 to the conveyor belt 2 when the sand and gravel are discharged through the discharge port 102, so as to avoid the sand and gravel moving rapidly toward the conveyor belt 2 under the action of gravity and pressure when the sand and gravel are discharged through the discharge port 102, causing the sand and gravel to splash and splash around after falling on the conveyor belt 2, causing the sand and gravel to fall outside the conveyor belt 2; at the same time, by reducing the pressure when the sand and gravel are discharged, the pressure at the discharge port 102 is reduced, so as to avoid excessive pressure at the discharge port 102, which makes it inconvenient to adjust the output at the discharge port 102.

[0027] In this solution, the discharge port 102 is set to be arc-shaped, so that when the discharge port 102 discharges sand and gravel, when there is sand and gravel accumulation at the bottom of the discharge port 102, there is still a gap at the top of the discharge port 102 to discharge the sand and gravel, thereby ensuring the smoothness of the discharge port 102 when discharging sand and gravel.

[0028] A control unit 3 is provided on the discharge port 102, and the control unit 3 is used to adjust the opening and closing size of the discharge port 102 of the discharge hopper 1, so as to adjust the discharge speed of the discharge hopper 1. The control unit 3 includes a control panel 301, and the control panel 301 is located on one side of the discharge port 102, and the control panel 301 covers the discharge port 102. By arranging the control panel 301 on the discharge port 102 to adjust the opening size of the discharge port 102, when conveying sand and gravel, the unit discharge amount of the discharge port 102 can be adjusted, so as to ensure the convenience of controlling the output amount of sand and gravel.

[0029] The control panel 301 is slidably connected to the side wall of the discharge hopper 1, and the control panel 301 can move up and down along the height direction on the discharge port 102 to adjust the size of the discharge opening between the control panel 301 and the discharge port 102. Specifically, a chute 103 is provided at the corresponding position of the outer wall of the discharge hopper 1 and the control panel 301, and the chute 103 extends upward along the height direction on the outer wall of the discharge hopper 1. A fixing rod 302 is provided between the control panel 301 and the chute 103, and one end of the fixing rod 302 is fixedly connected to the control panel 301 by bolts, and the other end is slidably connected to the chute 103, and the fixing rod 302 is used to drive the control panel 301 to move up and down along the height direction. By setting a slide groove 103 on the discharge hopper 1 to connect with the control board 301, when the control board 301 moves up and down in the height direction on the discharge hopper 1, it can be directed to move under the positioning action of the slide groove 103, thereby avoiding displacement of the control board 301 during the movement and affecting the control board 301's regulating effect on the size of the discharge port 102.

[0030] A driving member 303 is provided between the fixed rod 302 and the discharge hopper 1, and the driving member 303 is used to drive the fixed rod 302 to move along the extension direction of the slide slot 103; specifically, the base of the driving member 303 is fixedly connected to the outer wall of the discharge hopper 1 by bolts, and the output end of the driving member 303 is fixedly connected to the fixed rod 302 by bolts. The driving member 303 can be a power output device such as an electric telescopic rod and a cylinder. The control panel 301 is driven to move by the driving member 303, so that the control panel 301 can accurately and conveniently adjust the position, and after the control panel 301 moves to the specified position, it can be fixed under the action of the driving member 303, so as to ensure the stability of the position of the control panel 301 after adjustment.

[0031] One end of the conveyor belt 2 is located below the discharge port 102 of the discharge hopper 1, and the other end of the conveyor belt 2 extends in the feeding direction away from the discharge hopper 1. A drive motor is provided on the conveyor belt 2, and the drive motor is used to drive the conveyor belt 2 to move along the feeding direction. The specific structure of the conveyor belt 2 is the prior art and will not be described in detail here. A frequency converter is also provided on the conveyor belt 2, and the frequency converter is electrically connected to the drive motor. The frequency converter is used to adjust the rotation speed of the drive motor to adjust the conveying speed of the conveyor belt 2. The rotation speed of the drive motor of the conveyor belt 2 is adjusted by the frequency converter, so that when the transmission speed of the conveyor belt 2 is adjusted, multi-level speed adjustment can be performed under the action of the frequency converter, thereby improving the accuracy of the transmission speed adjustment of the conveyor belt 2.

[0032] A partition net 4 is provided at the top of the discharge hopper 1. The partition net 4 completely covers the opening at the top of the discharge hopper 1. Meshes for sand and gravel to pass through are provided on the partition net 4. The partition net 4 is used to screen the diameter of the sand and gravel delivered to the discharge hopper 1 for discharge. By providing the partition net 4 in the discharge hopper 1, the sand and gravel can be screened by the partition net 4 first when they are input into the discharge hopper 1, so as to avoid the sand and gravel with too large particle size being directly input into the discharge hopper 1, resulting in the blockage of the discharge port 102 when the discharge hopper 1 discharges the sand and gravel, thereby affecting the normal discharge of the discharge hopper 1.

[0033] It also includes a control unit, which is electrically connected to the conveyor belt 2 and the control unit 3. The control unit is used to adjust the speed of the conveyor belt 2 and the opening and closing size of the control unit 3 according to the demand for sand and gravel transportation, so as to control the conveying speed of the sand and gravel. Specifically, when adjusting the conveying speed of the sand and gravel, according to the demand for sand and gravel during actual production and processing, the transmission speed of the conveyor belt 2 or the opening and closing size of the control unit 3 is adjusted, so that the amount of sand and gravel falling on the conveyor belt 2 and the sand and gravel transportation volume per unit time of the conveyor belt 2 are adjusted. The control unit can be a control chip such as a single-chip microcomputer and a microprocessor. Preferably, in this embodiment, the control unit uses a single-chip microcomputer of the model STM32 F102 to complete the control operation. In other embodiments, other control chips can also be used for control operations.

[0034] The control unit also stores preset values ​​of the conveyor belt 2 speed and the opening and closing size of the control unit 3 that match multiple sand and gravel conveying speeds. Specifically, in the control unit, according to the actual production and processing volume, the corresponding sand and gravel transportation volume level per hour (such as 30 tons per hour, 40 tons per hour, 50 tons per hour and other multiple sand and gravel transportation volume levels) is preset in the control unit to adjust the conveyor belt 2 conveying speed and the opening and closing size of the control unit 3 that match each transportation level. When the sand and gravel transportation volume needs to be adjusted, the corresponding preset level can be selected, and the control unit adjusts the conveyor belt 2 and the control unit 3 according to the preset content, wherein the specific values ​​of the conveyor belt 2 conveying speed and the opening and closing size of the control unit 3 in the preset content can be the optimal ratio based on testing different conveyor belt 2 speeds and the opening and closing sizes of the control unit 3 during the sand and gravel transportation process. By presetting multiple sand and gravel transport volume levels in the control unit, when the sand and gravel transport volume per unit time needs to be adjusted, the corresponding conveying speed of the conveyor belt 2 and the opening and closing size of the control unit 3 can be directly selected according to the preset content of the control unit, thereby ensuring the accuracy of the sand and gravel transport volume adjustment and avoiding the need to debug the speed of the conveyor belt 2 and the opening and closing size of the control unit 3 multiple times during the transportation process, thereby increasing the workload of control and adjustment.

[0035] The specific implementation process is as follows:

[0036] When conveying sand and gravel, the sand and gravel to be processed are input into the discharge hopper 1, and are put onto the conveyor belt 2 through the discharge port 102 at the bottom of the discharge hopper 1, and the conveyor belt 2 conveys the sand and gravel put into the discharge hopper 1 to a designated position. When conveying sand and gravel through the discharge hopper 1 and the conveyor belt 2, the control unit 3 adjusts the discharge speed of the discharge hopper 1 and the conveying speed of the conveyor belt 2, so that the amount of sand and gravel conveyed per unit time matches the amount required for processing.

[0037] Compared with the prior art, in this solution, when sand and gravel are transported, the discharge speed of the discharge hopper 1 and the conveying speed of the conveyor belt 2 are controlled, so that during the conveying process, the amount of sand and gravel transported per unit time can be accurately controlled to ensure that the transported sand and gravel can match the actual production demand, avoid the deviation between the transported sand and gravel and the actual demand, and affect the normal production and processing; and ensure that the sand and gravel can be transported at a uniform speed when transported to the next processing procedure, to ensure that when the next processing procedure processes the sand and gravel, the input speed of the sand and gravel matches the processing speed of the sand and gravel, avoid the input speed of the sand and gravel is too fast, resulting in the next processing procedure unable to completely process the sand and gravel, affecting the processing effect of the sand and gravel, or the input speed of the sand and gravel is too slow, resulting in idling of the processing equipment, reducing the processing efficiency of the sand and gravel.

[0038] Embodiment 2

[0039] As attached Figure 2 As shown, different from other embodiments, the present embodiment also includes a detection unit, and the detection unit is used to detect the discharge flow rate of the discharge hopper 1. Specifically, the detection unit in the present embodiment includes a flow monitor 5, and the flow monitor 5 is located on the side of the discharge port 102 of the discharge hopper 1 away from the discharge cavity. The input port of the flow monitor 5 is fixedly connected to the outer wall of the discharge hopper 1 by bolts, and the other end extends outward in the direction away from the discharge hopper 1. In the present embodiment, the flow monitor 5 uses a powder flow meter with a model of DN25. In other embodiments, other types of flow meters can also be used to monitor the output flow of the discharge port 102. The specific content of monitoring the discharge flow of the discharge port 102 by the flow meter is the prior art and will not be repeated here.

[0040] The detection unit is electrically connected to the control unit. The control unit is used to analyze the discharge flow rate of the discharge port 102 according to the detection results of the detection unit. Specifically, the control unit also stores flow values ​​that match the opening and closing sizes of the control unit 3. The control unit determines whether the sand and gravel transportation volume matches the preset value based on the preset flow value. Specifically, after the control unit adjusts the conveyor belt 2 and the control unit 3 according to the actual demand during sand and gravel processing and the preset values ​​of the conveyor belt 2 speed and the opening and closing size of the control unit 3 stored in the control unit, the output flow of the discharge port 102 is monitored by the detection unit during the sand and gravel transportation process to determine whether the actual discharge volume of the discharge port 102 matches the preset flow value of the current opening and closing size of the control unit 3; when the flow value detected by the detection unit matches the preset flow value, the discharge flow size of the discharge port 102 is normal; when the flow value detected by the detection unit is less than the first threshold of the preset flow value, the discharge flow of the discharge port 102 is too slow, and there may be a blockage in the discharge hopper 1; when the flow value detected by the detection unit is greater than the second threshold of the preset flow value, the discharge flow of the discharge port 102 is too fast, which may be due to the fact that the sand and gravel in the storage chamber 101 are too fine, resulting in a too fast discharge flow, and the control unit adjusts the opening and closing of the control unit 3 so that the discharge flow of the discharge port 102 matches the preset value. The first threshold may be 80% of the preset flow value, and the second threshold may be 120% of the preset flow value. In other embodiments, other ratios of preset flow values ​​may be selected as the first threshold and the second threshold.

[0041] The discharge hopper 1 also includes an auxiliary part, which is used to assist the output of sand and gravel in the discharge hopper 1. The specific auxiliary part is used to drive the sand and gravel in the discharge hopper 1 to vibrate, wherein the auxiliary part can be a vibration roller 6 or a vibration plate. Preferably, in the present embodiment, the auxiliary part uses a vibration roller 6, and one end of the specific vibration roller 6 is fixedly connected to the inner wall of the discharge hopper 1 by bolts, and the other end extends into the storage cavity 101 in the discharge hopper 1. A vibration motor is connected to the end of the vibration roller 6 away from the discharge hopper, and the vibration motor is used to drive the vibration roller to vibrate, wherein the specific structure of the vibration roller 6 and the vibration motor is the prior art and will not be repeated here.

[0042] The auxiliary part is also electrically connected to the control unit, and the control unit is used to control the start and stop of the auxiliary part according to the detection result of the detection unit. Specifically, when the control unit detects that the flow rate of the discharge port 102 is too slow, the control unit controls the auxiliary part to drive the sand and gravel in the storage chamber 101 to vibrate, thereby accelerating the output speed of the sand and gravel in the storage chamber 101.

[0043] Compared with other embodiments, in this embodiment, by adding a detection unit to the discharge port 102 to detect the real-time output flow of the discharge port 102, after adjusting the sand and gravel conveying amount per unit time by the preset value of the conveyor belt 2 speed and the opening size of the control unit 3, the actual sand and gravel conveying amount in the conveying process can be detected by the detection unit, and the control unit 3 or the auxiliary unit is controlled according to the detection result to ensure that the output flow of the discharge port 102 matches the preset output flow of the opening and closing size of the control unit 3, avoiding the discharge port 102 from increasing the flow due to too fine sand and gravel or blocking in the discharge hopper 1, resulting in the sand and gravel conveying amount matching the actual demand, and ensuring the accuracy of the sand and gravel conveying amount. In addition, by setting the auxiliary unit in the discharge hopper 1, the control unit 3 can promote the output of sand and gravel when there is a slight blockage in the discharge hopper 1, ensuring the normal conveying of sand and gravel, and avoiding the blockage caused by the deposition of sand and gravel in the discharge hopper 1, ensuring the smoothness of the discharge of the discharge hopper 1, and reducing the maintenance cost of the discharge hopper 1.

[0044] It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sand and gravel conveying system, characterized in that: It includes a discharging hopper, which is connected to a storage chamber, and sand and gravel are stored in the storage chamber; the discharging hopper is provided with a discharging port near one end of the bottom, and a conveyor belt is provided below the discharging port, and the discharging hopper is used to transport the sand and gravel in the storage chamber to the conveyor belt, and the conveyor belt is used to transport the sand and gravel; the discharging port is provided with a control unit, and the control unit is used to adjust the opening and closing size of the discharging port; it also includes a control unit, and the control unit is used to control the control unit to adjust the size of the discharging port and the conveying speed of the conveyor belt, and the control unit adjusts the conveying speed of the sand and gravel according to the adjustment of the control unit and the conveyor belt.

2. A sand and gravel conveying system according to claim 1, characterized in that: The bottom of the discharge hopper is a closed end, and the discharge port is located at one side of the bottom of the discharge hopper.

3. A sand and gravel conveying system according to claim 2, characterized in that: The discharge port is an arc-shaped opening.

4. A sand and gravel conveying system according to claim 1, characterized in that: The control part comprises a control panel, the control panel is located at one side of the discharge port, the control panel covers the discharge port, and the control panel can move up and down along the height direction.

5. A sand and gravel conveying system according to claim 4, characterized in that: The corresponding positions of the discharge hopper and the control panel are provided with sliding grooves, and the control panel is connected to the sliding grooves through a fixing rod.

6. A sand and gravel conveying system according to claim 5, characterized in that: A driving member is disposed on the fixing rod, and the driving member is used to drive the fixing rod to move along the extending direction of the sliding slot.

7. A sand and gravel conveying system according to claim 1, characterized in that: A partition net is provided on the top of the discharge hopper, and the partition net completely covers the opening on the top of the discharge hopper. The partition net is used to screen the sand and gravel transported into the discharge hopper.

8. A sand and gravel conveying system according to claim 1, characterized in that: The control unit also stores a plurality of preset values ​​of the conveyor belt speed and the opening and closing size of the control unit that match the sand and gravel conveying speed, and the control unit adjusts the conveyor belt and the control unit according to the preset values.

9. A sand and gravel conveying system according to any one of claims 1 to 8, characterized in that: It also includes a detection unit, the sand and gravel detection unit is used to detect the discharge flow rate of the sand and gravel discharge hopper, and the control unit is used to adjust the control unit according to the detection result of the detection unit.

10. A sand and gravel conveying system according to claim 9, characterized in that: The discharge hopper also includes an auxiliary part, and the auxiliary part is used to drive the sand and gravel in the discharge hopper to vibrate.

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