Sand and gravel aggregate transport structure

Abstract

The application relates to the technical field of material transportation, and discloses a sand and stone aggregate transportation structure device, which comprises an adjusting plate, a stroke hole, a connecting plate and a connecting roller. Stroke holes are arranged on the upper and lower positions of one side of the adjusting plate and located above and below the connecting shaft, sliding rails are fixedly installed on the inner walls of the stroke holes, stroke blocks are movably installed in the stroke holes, the connecting plate is fixedly installed on one side of the stroke blocks, the connecting roller is movably sleeved with one end of the connecting plate, the connecting roller is sleeved with an upgoing and a downgoing conveying belt, the upgoing conveying belt and the downgoing conveying belt have an overlapping part in the perspective angle, sand and stone aggregates falling on the upgoing conveying belt can stably fall on the downgoing conveying belt, the adjusting device can only be counterclockwise rotated, and the rotating angle is less than 90 degrees, so that the end point of the upgoing conveying belt can be kept in front of the start point of the downgoing conveying belt during the process of adjusting the tension force, and sand and stone aggregates can stably fall on the downgoing conveying belt.

Description

Technical Field

[0001] This application relates to the field of material transportation technology, and in particular to a sand and gravel aggregate transportation structure device. Background Technology

[0002] Sand and gravel aggregates are a very common building material. In order to reduce transportation costs, long-distance corridor transportation is adopted. For example, the long-distance corridor project of the Shigouchong Green Building Materials Base in Qichun County requires the sand and gravel aggregates to be transported from the mine to Maoshan Port in Qichun County and then transferred by waterway. In the long run, this transportation method is much cheaper than truck transportation.

[0003] To achieve long-distance transportation, multiple conveyor belts will be combined to form the transportation structure, which will be fully enclosed to largely eliminate floating and sinking issues during transport. Furthermore, the transportation system needs to cross the Beijing-Kowloon Railway and National Highway G220 during construction to minimize impact on other transportation systems. The conveyor belts will be placed within the web of the box girder, eliminating the need for separate structures to house them. This structure is cast in one piece, resulting in lower construction difficulty, controllable quality, economical and scientific project cost, and low maintenance costs.

[0004] While existing transport structures possess many advantages, they still have certain limitations in practical use. Significant height differences arise between conveyor belts during their ascent. Because the conveyor belts are independent and lack continuity, to prevent aggregate from slipping between the upward and downward conveyor belts, the endpoints of the upward and downward conveyor belts overlap. This increases construction costs, and the tensioning mechanism alters the belt length, necessitating further increases in the overlap to ensure stable transfer of aggregate from the upward to the downward conveyor belt. Therefore, this application proposes an aggregate transport structure device to address these issues. Summary of the Invention

[0005] This application proposes a sand and gravel aggregate transportation structure device, which has the advantage of a small overlap between the upward and downward conveyor belts, in order to solve the problem of abnormal material drop during the transportation of sand and gravel aggregates.

[0006] To achieve the above objectives, this application adopts the following technical solution: a sand and gravel aggregate transportation structure device, comprising a base, a bracket fixedly installed on the top of the base near both sides by bolts, a dust cover fixedly installed on the top of the bracket by snap-fit, two dust covers being connected to each other to form a complete cylindrical cavity, a negative pressure machine fixedly installed on the top of the base near the bracket by bolts, the input end of the negative pressure machine being connected to the inner cavity of the dust cover via a pipe, a dust collection box fixedly installed on the top of the base near the negative pressure machine by bolts, the output end of the negative pressure machine being connected to the inner cavity of the dust collection box via a pipe, an adjusting motor fixedly installed on the front of the dust cover near the top by bolts, a connector fixedly installed on the back of the dust cover near both sides by welding, a cleaning device fixedly installed on one side of the connector by bolts, a rotating device fixedly installed on the output end of the adjusting motor by bolts, the two ends of the rotating device being movably connected to the bracket by bearings, and the rotating device being sleeved inside the cleaning device.

[0007] Furthermore, the cleaning device includes a limiting sleeve, with connecting brackets fixedly installed on both sides of the outer surface of the limiting sleeve by welding. Both ends of the connecting brackets are fixedly connected to the connecting parts. The interior of the limiting sleeve is provided with a limiting groove by casting. The top and bottom of the outer surface of the limiting sleeve are fixedly installed with travel brackets by welding. The top of the travel bracket is movably installed with a travel rod by sliding fit. The top of the travel rod is fixedly installed with a brush by bolt connection. The bottom of the travel rod is fixedly installed with an elastic sensing plate by bolt connection. The top of the elastic sensing plate is fixedly installed with a spring by snap-fit ​​at a position outside the travel rod.

[0008] Furthermore, the signal output terminal of the elastic sensing plate is connected to the signal input terminal of the negative pressure machine via a signal connection. The greater the pressure on the elastic sensing plate, the lower the operating power of the negative pressure machine.

[0009] Furthermore, the unfolding angle of the limiting groove is ninety degrees.

[0010] Furthermore, the rotating device includes a rotating rod, and the top and bottom of the outer surface of the rotating rod are provided with limit strips by casting. The limit strips cooperate with the limit grooves. The two ends of the limit strips are fixedly installed with connecting rods by welding. One end of the connecting rod is fixedly installed with a threaded connecting seat by welding. An adjustment device is fixedly installed on one side of the threaded connecting seat by bolt connection.

[0011] Furthermore, the adjusting device includes an adjusting plate. A connecting shaft is fixedly installed on one side of the adjusting plate near the center by welding. The connecting shaft is fixedly connected to the output shaft of the adjusting motor. Stroke holes are cast on one side of the adjusting plate above and below the connecting shaft. Slide rails are fixedly installed on both sides of the inner wall of the stroke holes by welding. Stroke blocks are movably installed inside the stroke holes through sliding fit. The two sides of the stroke blocks cooperate with the slide rails. A power motor is fixedly sleeved on one end of the inner wall of the stroke holes through a shaft hole. An adjusting screw is fixedly installed on one end of the output shaft of the power motor by bolt connection. The adjusting screw is sleeved with the stroke block through threads. A connecting plate is fixedly installed on one side of the stroke block by bolt connection. A connecting roller is movably sleeved on one end of the connecting plate through a bearing connection.

[0012] Furthermore, the connecting rollers are respectively fitted onto the upward and downward conveyor belts.

[0013] Furthermore, the cross-sectional shape of the connecting plate is arc-shaped.

[0014] This application has the following beneficial effects.

[0015] 1. The upward and downward conveyor belts overlap when viewed from above. This ensures that the sand and gravel aggregate falling from the upward conveyor belt can land stably on the downward conveyor belt. The adjustment device can only rotate counterclockwise, and the rotation angle is less than 90 degrees. This ensures that the end point of the upward conveyor belt can always remain in front of the starting point of the downward conveyor belt during the tension adjustment process, so that the sand and gravel aggregate can land stably on the downward conveyor belt.

[0016] 2. During the rotation of the motor-driven rotating device, the top and bottom connecting rollers simultaneously adjust the tension of the upward and downward conveyor belts, enabling a single tensioning structure to adjust the tension of two independent conveyor belts at the same time.

[0017] 3. When the conveyor belt is relatively taut, the travel block can be moved closer to the connecting shaft by the power machine to reduce the tension of the conveyor belt. When the conveyor belt is relatively slack, the travel block can be moved further away from the connecting shaft by the same method to increase the tension of the conveyor belt. Furthermore, the effect of adjusting the tension by the power machine is independent of the upward and downward conveyor belts and does not affect each other.

[0018] 4. The brushes contact the upper and lower conveyor belts respectively, thereby achieving the effect of cleaning the surface of the conveyor belts. When there is more material on the surface of the conveyor belt, the distance between the connecting roller and the connecting shaft in the vertical direction is shortened after the rotating device rotates. This causes the brushes to move vertically under the pressure of the conveyor belts. Under the elastic force of the springs, the brushes are lifted by the force between the conveyor belts. Thus, as the amount of sand and gravel aggregate conveyed on the surface of the conveyor belt increases, the cleaning ability of the brushes on the surface of the conveyor belt also increases, thereby achieving the effect of automatic adjustment.

[0019] 5. When the height difference between the upward conveyor belt and the next conveyor belt is greater, the kinetic energy of the falling sand and gravel aggregate is greater, and the more floating dust is generated by the impact, the negative pressure machine operates at a higher power and the dust collection efficiency is higher. When the height difference between the upward conveyor belt and the next conveyor belt is smaller, the kinetic energy of the falling sand and gravel aggregate is smaller, and the floating dust generated by the impact is less, the negative pressure machine operates at a lower power and the dust collection efficiency is lower. This allows the negative pressure machine to operate at its optimal power, thus playing a role in energy saving and emission reduction. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0021] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0022] Figure 1 This is a structural diagram of the main body of the invention.

[0023] Figure 2 This is a diagram of the interface of the structure of this invention.

[0024] Figure 3 This is a schematic diagram of the structure of the present invention;

[0025] Figure 4 This is a structural diagram of the main body of the present invention;

[0026] Figure 5 This is a front view of the main structure of the present invention;

[0027] Figure 6 The structure of this invention Figure 5 Cross-sectional view along the AA direction;

[0028] Figure 7 This is a schematic diagram of the cleaning device of the present invention;

[0029] Figure 8 This is a right view of the structural cleaning device of the present invention;

[0030] Figure 9 The structure of this invention Figure 8Cross-sectional view along the BB direction;

[0031] Figure 10 The structure of this invention Figure 9 Cross-sectional view along the CC direction;

[0032] Figure 11 This is a schematic diagram of the rotating device of the present invention;

[0033] Figure 12 This is a schematic diagram of the structural adjustment device of the present invention;

[0034] Figure 13 This is a right view of the structural adjustment device of the present invention;

[0035] Figure 14 The structure of this invention Figure 13 Cross-sectional view along the DD direction;

[0036] Figure 15 This is a schematic diagram of the connecting rollers in the structure of the present invention;

[0037] Figure 16 This is a schematic diagram of the structural operation mode of the present invention.

[0038] In the diagram: 1. Base; 2. Bracket; 3. Dust cover; 4. Negative pressure unit; 5. Dust collection box; 6. Adjusting motor; 7. Connecting parts; 8. Cleaning device; 81. Limiting sleeve; 82. Connecting bracket; 83. Limiting groove; 84. Stroke bracket; 85. Stroke rod; 86. Brush; 87. Elastic sensing plate; 88. Spring; 9. Rotating device; 91. Rotating rod; 92. Limiting strip; 93. Connecting rod; 94. Threaded connecting seat; 95. Adjusting device; 951. Adjusting plate; 952. Connecting shaft; 953. Stroke hole; 954. Slide rail; 955. Stroke block; 956. Power unit; 957. Adjusting screw; 958. Connecting plate; 959. Connecting roller. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] Please refer to the following: A sand and gravel aggregate transportation structure device. Figures 1-6The system includes a base 1, with a bracket 2 bolted to the top of the base 1 near both sides. A dust cover 3 is snap-fitted to the top of the bracket 2. Two dust covers 3 are connected to each other to form a complete cylindrical cavity. A negative pressure unit 4 is bolted to the top of the base 1 near the bracket 2. The input end of the negative pressure unit 4 is connected to the inner cavity of the dust cover 3 via a pipe. A dust collection box 5 is bolted to the top of the base 1 near the negative pressure unit 4. The output end of the negative pressure unit 4 is connected to the inner cavity of the dust collection box 5 via a pipe. An adjusting motor 6 is bolted to the front of the dust cover 3 near the top. Connecting parts 7 are welded to the back of the dust cover 3 near both sides. A cleaning device 8 is bolted to one side of the connecting parts 7. A rotating device 9 is bolted to the output end of the adjusting motor 6. The two ends of the rotating device 9 are movably connected to the bracket 2 via bearings, and the rotating device 9 is fitted inside the cleaning device 8.

[0041] Please see Figures 7-10 and Figures 12-15 The cleaning device 8 includes a limiting sleeve 81. Connecting brackets 82 are welded and fixedly installed on both sides of the outer surface of the limiting sleeve 81. Both ends of the connecting brackets 82 are fixedly connected to the connecting parts 7. A limiting groove 83 is cast inside the limiting sleeve 81. Travel brackets 84 are welded and fixedly installed on the top and bottom of the outer surface of the limiting sleeve 81. A travel rod 85 is movably installed on the top of the travel bracket 84 through a sliding fit. A brush 86 is bolted and fixedly installed on the top of the travel rod 85. An elastic sensing plate 87 is bolted and fixedly installed on the bottom of the travel rod 85. A spring 88 is snap-fitted and fixedly installed on the top of the elastic sensing plate 87, located outside the travel rod 85. The brush 86 contacts both the upward conveyor belt and the downward transmission belt, thereby cleaning the surface of the conveyor belts. The cleaning effect prevents fine debris from the aggregate from adhering to the surface of the conveyor belt, thus avoiding cracks on the conveyor belt surface during long-term use and improving the service life of the device. Simultaneously, as the amount of material on the conveyor belt surface increases, the distance between the connecting roller 959 and the connecting shaft 952 in the vertical direction shortens after the rotating device 9 rotates. This causes the brush 86 to move vertically under the pressure of the conveyor belt, and under the elastic force of the spring 88, the brush 86 increases in height due to the force between the conveyor belt and the brush. Therefore, as the amount of aggregate conveyed to the conveyor belt surface increases, the cleaning ability of the brush 86 on the conveyor belt surface also increases, achieving an automatic adjustment effect. This ensures that the contact force between the brush 86 and the conveyor belt is at its optimal state, thereby improving the service life of the brush 86.

[0042] Please see Figure 3 and Figures 10-11The signal output terminal of the elastic sensing plate 87 is connected to the signal input terminal of the negative pressure machine 4 via a signal connection. The greater the pressure on the elastic sensing plate 87, the lower the operating power of the negative pressure machine 4. When the adjusting device 95 rotates counterclockwise, the distance between the connecting rollers 959 decreases, the distance between the upward conveyor belt and the downward conveyor belt decreases, and the kinetic energy of the falling sand and gravel aggregate decreases, thus reducing the amount of dust raised. Since the larger the angle of counterclockwise rotation of the adjusting device 95, the greater the distance the brush 86 moves in the vertical direction, and the greater the elastic force of the spring 88, the elastic sensing plate 87 can sense the elastic force generated by the spring 88 and transmit it through the elastic sensing plate 87. The signal output terminal of 7 is connected to the signal input terminal of the negative pressure machine 4 via a signal connection. The greater the pressure on the elastic sensing plate 87, the lower the operating power of the negative pressure machine 4, thus achieving the purpose of adjusting the power of the negative pressure machine 4. When the height difference between the upward conveyor belt and the next conveyor belt is greater, the kinetic energy of the falling sand and gravel aggregate is greater, and the more floating dust is generated by the impact, the negative pressure machine 4 is at a higher power and the dust collection efficiency is higher. When the height difference between the upward conveyor belt and the next conveyor belt is smaller, the kinetic energy of the falling sand and gravel aggregate is smaller, and the floating dust generated by the impact is less, the negative pressure machine 4 is at a lower power and the dust collection efficiency is lower. This allows the negative pressure machine 4 to operate at the optimal power, playing a role in energy saving and emission reduction.

[0043] Please see Figure 10 The unfolding angle of the limiting groove 83 is ninety degrees.

[0044] Please see Figure 11 The rotating device 9 includes a rotating rod 91. The top and bottom of the outer surface of the rotating rod 91 are provided with limit strips 92 by casting. The limit strips 92 cooperate with the limit grooves 83. The two ends of the limit strips 92 are fixedly installed with connecting rods 93 by welding. One end of the connecting rods 93 is fixedly installed with a threaded connecting seat 94 by welding. One side of the threaded connecting seat 94 is fixedly installed with an adjusting device 95 by bolt connection.

[0045] Please see Figure 2 and Figures 12-15The adjusting device 95 includes an adjusting plate 951. A connecting shaft 952 is fixedly installed on one side of the adjusting plate 951 near the center by welding. The connecting shaft 952 is fixedly connected to the output shaft of the adjusting motor 6. A stroke hole 953 is cast on one side of the adjusting plate 951 above and below the connecting shaft 952. A slide rail 954 is fixedly installed on both sides of the inner wall of the stroke hole 953 by welding. A stroke block 955 is movably installed inside the stroke hole 953 by sliding fit. The two sides of the stroke block 955 cooperate with the slide rail 954. A power machine 956 is fixedly sleeved on one end of the inner wall of the stroke hole 953 through a shaft hole. An adjusting screw 957 is fixedly installed on one end of the output shaft of the power machine 956 by bolt. The adjusting screw 957 is sleeved on the stroke block 955 by thread. A connecting plate 958 is fixedly installed on one side of the stroke block 955 by bolt. One end of 58 is movably connected to a connecting roller 959 via a bearing. The power unit 956 can drive the adjusting screw 957 to rotate, thereby moving the threaded travel block 955 along the extension direction of the slide rail 954. When the conveyor belt is relatively taut, the power unit 956 can move the travel block 955 closer to the connecting shaft 952 to reduce the tension of the conveyor belt. When the conveyor belt is relatively slack, the travel block 955 can be moved away from the connecting shaft 952 in the same way to increase the tension of the conveyor belt. Furthermore, the effect of adjusting the tension by the power unit 956 is independent of the upward and downward conveyor belts and does not affect each other. This avoids the problem that when adjusting the tension of the conveyor belt by rotating the rotating device 9, one conveyor belt may have a better tension while the other has an unsuitable tension, thus improving the reliability of the device.

[0046] Please see Figure 2 and Figure 14 The connecting rollers 959 are respectively fitted onto the upward and downward conveyor belts. The rotating device 9 is fixedly installed at the output end of the adjusting motor 6 by bolts. When the adjusting motor 6 drives the rotating device 9 to rotate, the connecting rollers 959 at the top and bottom can simultaneously adjust the tension of the upward and downward conveyor belts. This allows a single tensioning structure to adjust the tension of two independent conveyor belts at the same time. In traditional equipment, each independent conveyor belt requires an independent tensioning mechanism at one end, which is not only too costly but also more complicated to adjust. This application reduces the cost and the complexity of operation, and improves the practicality of the device.

[0047] Please see Figures 10-11 and Figures 14-16The connecting plate 958 has an arc-shaped cross-section. This arc shape ensures that the axis of the connecting roller 959 is on one side of the center line of the adjusting plate 951. This results in an overlap between the upward and downward conveyor belts from a top-down perspective, guaranteeing that the aggregate falling from the upward conveyor belt can land stably on the downward conveyor belt. Furthermore, because the limiting strip 92 cooperates with the limiting groove 83, and the opening angle of the limiting groove 83 is 90 degrees, the adjusting device 95 can only rotate counterclockwise, and the rotation angle is less than 90 degrees. This ensures that the end point of the upward conveyor belt remains in front of the starting point of the downward conveyor belt during tension adjustment, allowing the aggregate to land stably on the downward conveyor belt. This avoids the problem of increasing the overlap of the two conveyor belts to ensure the continuity of aggregate transportation in large-span combined conveyor belts, which would increase manufacturing costs. Moreover, the impact of the large height difference on the upward and downward conveyor belts is reduced, improving the stability of the device's operation.

[0048] The method of using this invention is as follows:

[0049] During operation, the axis of the connecting roller 959 is located on one side of the center line of the adjusting plate 951, resulting in an overlap between the upward and downward conveyor belts from a top-down perspective. This ensures that the sand and gravel aggregate falling from the upward conveyor belt can land stably on the downward conveyor belt. During tension adjustment, the end point of the upward conveyor belt remains in front of the starting point of the downward conveyor belt, ensuring stable landing of the sand and gravel aggregate. As the adjusting motor 6 drives the rotating device 9, the connecting rollers 959 at the top and bottom simultaneously adjust the tension of both the upward and downward conveyor belts. This allows a single tensioning structure to simultaneously adjust the tension of two independent conveyor belts. The power unit 956 can drive the adjusting... The lead screw 957 rotates, causing the threaded travel block 955 to move along the extension direction of the slide rail 954. When the conveyor belt is taut, the power unit 956 can move the travel block 955 closer to the connecting shaft 952 to reduce the tension of the conveyor belt. When the conveyor belt is slack, the same method can be used to move the travel block 955 further away from the connecting shaft 952 to increase the tension of the conveyor belt. The effect of adjusting the tension by the power unit 956 is independent of the upward and downward conveyor belts and does not affect each other. The brush 86 contacts both the upward and downward conveyor belts to clean the surface of the conveyor belts. The more material on the surface of the conveyor belt, the more the rotating device 956 needs to clean it. After rotation, the vertical distance between the connecting roller 959 and the connecting shaft 952 shortens, causing the brush 86 to move vertically under the pressure of the conveyor belt. Under the elastic force of the spring 88, the brush 86 is lifted by the force between the conveyor belts, thus increasing the cleaning ability of the brush 86 on the conveyor belt surface as the amount of sand and gravel conveyed increases. This achieves an automatic adjustment effect, ensuring the contact force between the brush 86 and the conveyor belt is optimal. When the adjusting device 95 rotates counterclockwise, the distance between the connecting rollers 959 decreases, the distance between the upward and downward conveyor belts decreases, and the kinetic energy of the falling sand and gravel decreases, resulting in a smaller amount of dust being stirred up. Due to the adjustment... The greater the counterclockwise rotation angle of the joint device 95, the greater the vertical movement distance of the brush 86, and the greater the elastic force of the spring 88. At this time, the elasticity sensing plate 87 can sense the elastic force generated by the spring 88, and connect it to the signal input terminal of the negative pressure machine 4 through the signal output terminal of the elasticity sensing plate 87. The greater the pressure on the elasticity sensing plate 87, the lower the operating power of the negative pressure machine 4, thus achieving the purpose of adjusting the power of the negative pressure machine 4. When the height difference between the upward conveyor belt and the next conveyor belt is greater, the kinetic energy of the falling sand and gravel aggregate is greater, and the more floating dust is generated by the impact, the negative pressure machine 4 operates at a higher power, resulting in higher dust collection efficiency. Conversely, when the height difference between the upward conveyor belt and the next conveyor belt is smaller, the kinetic energy of the falling sand and gravel aggregate is smaller.When less dust is generated by the impact, the negative pressure unit operates at a lower power level, resulting in lower dust collection efficiency.

Claims

1. A sand and gravel aggregate conveying device, characterized in that, The system includes a base (1), with brackets (2) fixedly installed on the top of the base (1) near both sides. Dust covers (3) are fixedly installed on the top of the brackets (2), and two dust covers (3) are connected to each other to form a complete cylindrical cavity. A negative pressure unit (4) is fixedly installed on the top of the base (1) near the brackets (2). The input end of the negative pressure unit (4) is connected to the inner cavity of the dust cover (3) via a pipe. A dust collection box (5) is fixedly installed on the top of the base (1) near the negative pressure unit (4). The output of the negative pressure unit (4)... The outlet is connected to the inner cavity of the dust collection box (5) through a pipe. An adjusting motor (6) is fixedly installed on the front of the dust cover (3) near the top. Connecting parts (7) are fixedly installed on the back of the dust cover (3) near both sides. A cleaning device (8) is fixedly installed on one side of the connecting part (7). A rotating device (9) is fixedly installed at the output end of the adjusting motor (6). The two ends of the rotating device (9) are movably connected to the bracket (2). The rotating device (9) is sleeved inside the cleaning device (8). The cleaning device (8) includes a limiting sleeve. (81), connecting brackets (82) are fixedly installed on both sides of the outer surface of the limiting sleeve (81), and both ends of the connecting brackets (82) are fixedly connected to the connecting piece (7). The limiting sleeve (81) is provided with a limiting groove (83). The top and bottom of the outer surface of the limiting sleeve (81) are fixedly installed with stroke brackets (84). The top of the stroke brackets (84) is movably installed with a stroke rod (85). The top of the stroke rod (85) is fixedly installed with a brush (86). The bottom of the stroke rod (85) is fixedly installed with an elastic sensing plate (86). 7) A spring (88) is fixedly installed on the top of the elastic sensing plate (87) at the position outside the stroke rod (85); the rotating device (9) includes a rotating rod (91), and limit strips (92) are provided on the top and bottom of the outer surface of the rotating rod (91). The limit strips (92) cooperate with the limit groove (83). Connecting rods (93) are fixedly installed at both ends of the limit strips (92). A threaded connecting seat (94) is fixedly installed at one end of the connecting rod (93). An adjusting device (95) is fixedly installed on one side of the threaded connecting seat (94).The adjusting device (95) includes an adjusting plate (951). A connecting shaft (952) is fixedly installed on one side of the adjusting plate (951) near the center. The connecting shaft (952) is fixedly connected to the output shaft of the adjusting motor (6). A stroke hole (953) is provided on one side of the adjusting plate (951) above and below the connecting shaft (952). Slide rails (954) are fixedly installed on both sides of the inner wall of the stroke hole (953). A stroke block is movably installed inside the stroke hole (953). (955), the two sides of the stroke block (955) cooperate with the slide rail (954), one end of the inner wall of the stroke hole (953) is fixedly sleeved with a power machine (956), one end of the output shaft of the power machine (956) is fixedly installed with an adjusting screw (957), the adjusting screw (957) is sleeved with the stroke block (955) by a thread, one side of the stroke block (955) is fixedly installed with a connecting plate (958), one end of the connecting plate (958) is movably sleeved with a connecting roller (959).

2. The sand and gravel aggregate transportation device according to claim 1, characterized in that, The signal output terminal of the elastic sensing plate (87) is connected to the signal input terminal of the negative pressure machine (4) through a signal connection. The greater the pressure on the elastic sensing plate (87), the lower the operating power of the negative pressure machine (4).

3. The sand and gravel aggregate transportation device according to claim 2, characterized in that, The expansion angle of the limiting groove (83) is ninety degrees.

4. The sand and gravel aggregate transportation device according to claim 1, characterized in that, The connecting roller (959) is respectively fitted with the upward conveyor belt and the downward conveyor belt.

5. A sand and gravel aggregate conveying device according to claim 1, characterized in that, The connecting plate (958) has an arc-shaped cross-section.

Images