Gravel aggregate loading conveyor

Abstract

The invention relates to the technical field of conveyors, in particular to a gravel aggregate loading conveyor. Comprising a rack and further comprises a lead screw distance adjusting module which is installed between the inner surfaces of the rack, the lead screw distance adjusting module is in transmission connection with a limiting plate, an inner plate is hinged to the limiting plate, the inner wall of the inner plate is slidably connected with a lifting plate a and two lifting plates b, the two lifting plates b are arranged in a mirror image mode, the positions and the angles of the lifting plates b are adjustable, and the two lifting plates b are connected with the rack. A first roller supporting piece is installed between the opposite surfaces of the two lifting plates b, two second roller supporting pieces which are arranged in a staggered mode are installed between the inner surfaces of the rack, and a conveying motor is installed on the side face of the rack. The gravel aggregate single-conveying and filtering conveyor has the beneficial effects that when the gravel aggregate single-conveying and filtering conveyor works, the gravel aggregate single-conveying and filtering conveyor has a gravel aggregate single-conveying mode and a gravel aggregate filtering mode, meanwhile, the filtering diameter of the gravel aggregate single-conveying and filtering conveyor can be adjusted when gravel is filtered and conveyed, and therefore the functionality of the gravel aggregate single-conveying and filtering conveyor is effectively improved, and the application range of the gravel aggregate single-conveying and filtering conveyor is effectively widened.

Description

Technical Field

[0001] The invention relates to the technical field of conveyors, in particular to a sand and gravel aggregate loading conveyor. Background Art

[0002] Aggregate sand and gravel is a very important building material, which is a mixture of raw materials of different volumes and weights. A sand and gravel aggregate conveyor is required for conveying sand and gravel aggregate. In the prior art, a patent document with publication number CN116605592A discloses a dust-proof conveyor for conveying aggregate sand and gravel, including a top plate, a support seat is fixedly installed on the bottom of the top plate by welding, a rib plate is fixedly installed on the top of the top plate near the two ends by bolt connection, a power shaft is movably sleeved on the top of the rib plate by bearing connection, and a conveyor belt is movably sleeved on the outer surface of the power shaft.

[0003] During the operation of the above-mentioned device, the water supply device inputs water into the detour plate by pressurizing, and the water enters the interior of the dust prevention device after being atomized by the detour plate, so that the small droplets in the water mist are used to suppress the dust inside the dust prevention device. However, the working mode of the above-mentioned conveyor during transportation is relatively single, and it is impossible to have both the conveying mode and the filtering mode during transportation. At the same time, the existing conveyor is not convenient for adjusting the conveying stroke during use. Based on this, the present invention provides a sand and gravel aggregate loading conveyor to solve the problems raised in the above-mentioned background technology. Summary of the invention

[0004] The present invention aims at the technical problems existing in the prior art and provides a sand and gravel aggregate loading conveyor to solve the problems that the existing conveyor has a relatively single working mode during conveying and cannot have both a conveying mode and a filtering mode during conveying, and at the same time, the existing conveyor is not convenient for adjusting the conveying stroke during use.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A sand and gravel aggregate loading conveyor includes a frame and also includes:

[0006] The screw pitch adjustment module is installed between the inner surfaces of the frame, the screw pitch adjustment module is transmission-connected with a limit plate, the limit plate is hinged with an inner plate, and the inner wall of the inner plate is slidably connected with a lifting plate a;

[0007] Two lifting plates b are arranged in mirror image and are adjustable in position and angle, and both of the two lifting plates b are connected to the frame, a first roller support is installed between the opposite surfaces of the two lifting plates b, and two second roller support members are installed between the inner surfaces of the frame in a staggered manner, and a conveying motor is installed on the side of the frame, and the output shaft end of the conveying motor is fixedly connected to one of the second roller support members;

[0008] Three tensioning frames a and two tensioning frames b distributed in a linear array are slidably connected between the inner surfaces of the frames, a third roller support is installed between the inner surfaces of each tensioning frame a and each tensioning frame b, a driven seat is slidably connected to the inner wall of the limit plate and corresponding to the position of each tensioning frame a and each tensioning frame b, the driven seat is connected to the third roller support, and an elastic tensioning member is installed on the frame and corresponding to the position of each tensioning frame a and each tensioning frame b;

[0009] A group of regularly distributed annular conveyor belts, each of which is connected to a first roller support member, a second roller support member and a third roller support member, and filter gaps with adjustable widths are fixedly arranged between the annular conveyor belts.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the inner wall of the frame is slidably connected to two side panels, both of which are hinged to the frame, and angle adjustment push rods are hinged between the two side panels and the frame. The two side panels are slidably connected to the two lifting plates b respectively, and linear drive modules are installed on the two side panels, and the two linear drive modules are respectively transmission-connected to the two lifting plates b.

[0012] Furthermore, the linear drive module includes a transmission screw rotatably connected to the side plate, the transmission screw is transmission-connected to a lifting plate b at a corresponding position, a motor is installed on the side plate, and the output shaft end of the motor is fixedly connected to the transmission screw.

[0013] The beneficial effect of adopting the above further scheme is that, when in use, the layout positions and layout angles of the lifting plates a and b are adjusted synchronously, and then the feeding height of the sand and gravel aggregate loading conveyor for the sand and gravel aggregate and the conveying stroke of the sand and gravel aggregate loading conveyor are adjusted;

[0014] When the device is not in use, the lifting plate a and the lifting plate b are fully reset and close to each other on the frame, thereby facilitating the flexible arrangement, rapid transfer and flexible transportation of the conveying device.

[0015] Furthermore, the screw pitch adjustment module includes a group of guide rods installed between the inner surfaces of the frame, each of the guide rods is slidably connected to the limit plate, a pitch adjusting screw is rotatably connected between the inner surfaces of the frame, the pitch adjusting screw is transmission connected to the limit plate, an adjusting motor is installed on the side of the frame, and the output shaft end of the adjusting motor is fixedly connected to the pitch adjusting screw.

[0016] The beneficial effect of adopting the above further scheme is that when the conveyor is in single conveying mode of sand and gravel aggregate, under the driving action of the screw pitch adjustment module, the limit plate is sufficiently close to the center line of the frame, and the spacing between the two driving wheels and the spacing between the two annular conveyor belts are adjusted to the minimum. When the spacing between the two annular conveyor belts is adjusted to the minimum, the width of the filter slot in the conveyor is adjusted to the minimum. The width of the filter slot is limited, so that the conveyor can perform single-mode conveying of sand and gravel aggregate.

[0017] When the conveyor is required to filter sand and gravel aggregates simultaneously while conveying them, the spacing between the two driving wheels on each conveying shaft rod is limited by adjusting the position of the limit plate according to the filtering specifications and filtering particle size requirements of the sand and gravel aggregates. By adjusting the spacing between the two driving wheels on each conveying shaft rod, the width of the filter seam between the two annular conveyor belts is accurately limited, thereby adjusting the filtering specifications of the sand and gravel aggregates of the conveyor in the conveying mode and realizing the conveying and filtering of the sand and gravel aggregates of the conveyor simultaneously.

[0018] Further, the first roller support member, the second roller support member and the third roller support member all include a conveying shaft rod, both ends of the conveying shaft rod in the first roller support member are rotatably connected to the lifting plate b, both ends of the conveying shaft rod in the second roller support member are rotatably connected to the frame, the lifting plate a and the lifting plate b are rotatably connected to the conveying shaft rod in the third roller support member, the output shaft end of the conveying motor is fixedly connected to the conveying shaft rod in a second roller support member, and the conveying shaft rod and the position corresponding to each annular conveyor belt are connected with a transmission wheel that cooperates with the annular conveyor belt, and the conveying shaft rod and the position corresponding to the position between two transmission wheels are sleeved with a limit spring, the two outermost transmission wheels in the first roller support member are respectively rotatably connected to a lifting plate b and a limit plate, the two outermost transmission wheels in the second roller support member are respectively rotatably connected to the frame and the limit plate, the tensioning frame a and the tensioning frame b are both rotatably connected to the leftmost transmission wheel in a third roller support member, and each of the driven seats is rotatably connected to the rightmost transmission wheel in a third roller support member.

[0019] The beneficial effect of adopting the above further scheme is that, when in use, the compression amplitude of the limit spring between the two transmission wheels is limited by the setting of the limit plate. When the limit plate is away from the direction of the transmission wheel, under the action of the limit spring, the spacing between the two transmission wheels is driven to change and the spacing between the two transmission wheels is increased. When the spacing between the two transmission wheels is changed, the spacing between the two annular conveyor belts is changed, and finally the size of the filter gap between the two annular conveyor belts is changed.

[0020] Furthermore, a guide shaft groove slidably connected to the conveying shaft rod is fixedly provided inside the transmission wheel, the cross sections of the conveying shaft rod and the guide shaft groove are both regular polygons, and a limiting ring groove is fixedly provided on the transmission wheel.

[0021] The beneficial effect of adopting the above further solution is that, when in use, the conveying shaft rod and the guide shaft groove are arranged in a regular polygonal cross section so that after the spacing between the two transmission wheels is changed, the conveying shaft rod can continuously drive the transmission wheels.

[0022] Furthermore, the annular conveyor belt includes a limiting portion, the shape of which is adapted to the shape of the limiting ring groove, and a conveying plate is installed on the limiting portion, the width of which is 1.2 to 1.3 times the width of the limiting portion.

[0023] The beneficial effect of adopting the above further solution is that, by setting the limiting part, the endless conveyor belt can be effectively limited by the driving wheel.

[0024] Furthermore, the elastic tensioning member includes guide posts installed on two sides of the frame, the lifting plate a and the lifting plate b are both slidably connected to the guide posts at corresponding positions, and the guide posts are sleeved with tensioning springs.

[0025] The beneficial effect of adopting the above further solution is that, by providing the elastic tensioning member, the endless conveyor belt can be kept tensioned at all times during the process of changing the layout shape of the endless conveyor belt.

[0026] Furthermore, the tensioning frame a and the tensioning frame b are staggered on the frame.

[0027] The beneficial effects of the present invention are:

[0028] 1. When the conveyor is working, it has both the single conveying mode of sand and gravel aggregates and the filtering mode of sand and gravel aggregates conveying. At the same time, the conveyor can also adjust the filter diameter of the conveyor during sand and gravel filtering and conveying, thereby effectively improving the functionality of the device and effectively increasing the applicable scenarios of the device.

[0029] 2. When the present invention is used, when the conveyor performs a single conveying mode of sand and gravel aggregates, under the driving action of the screw distance adjustment module, the limit plate is sufficiently close to the center line of the frame, and the spacing between the two transmission wheels and the spacing between the two annular conveyor belts are adjusted to the minimum. When the spacing between the two annular conveyor belts is adjusted to the minimum, the width of the filter seam in the conveyor is then adjusted to the minimum. By limiting the width of the filter seam, the conveyor can perform a single-mode conveying of sand and gravel aggregates.

[0030] 3. In the present invention, when the conveyor is required to filter the sand and gravel aggregates simultaneously when conveying the sand and gravel aggregates, the spacing between the two transmission wheels on each conveying shaft is limited by adjusting the position of the limit plate according to the filtering specifications and filtering particle size requirements of the sand and gravel aggregates. By adjusting the spacing between the two transmission wheels on each conveying shaft, the width of the filter seam between the two annular conveyor belts is accurately limited, thereby adjusting the filtering specifications of the sand and gravel aggregates of the conveyor in the conveying mode and realizing the conveying and filtering of the sand and gravel aggregates of the conveyor simultaneously.

[0031] 4. When the present invention is used, the compression amplitude of the limit spring between the two transmission wheels is limited by setting the limit plate. When the limit plate is away from the transmission wheel, under the action of the limit spring, the distance between the two transmission wheels is driven to change and the distance between the two transmission wheels is increased. When the distance between the two transmission wheels is changed, the distance between the two annular conveyor belts is changed, and finally the size of the filter gap between the two annular conveyor belts is changed.

[0032] 5. When the present invention is used, the layout positions and layout angles of the lifting plates a and b are adjusted synchronously, and then the feeding height of the sand and gravel aggregate loading conveyor for the sand and gravel aggregate and the conveying stroke of the sand and gravel aggregate loading conveyor are adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of a sand and gravel aggregate loading conveyor of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the lifting plate b and the limiting plate of the present invention;

[0035] Figure 3 For the present invention Figure 2 A schematic diagram of the structure from another perspective;

[0036] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0037] Figure 5 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0038] Figure 6 For the present invention Figure 3 A schematic cross-sectional structure diagram of ;

[0039] Figure 7 It is a structural schematic diagram of the endless conveyor belt of the present invention;

[0040] Figure 8 It is a structural schematic diagram of the conveying shaft and the transmission wheel of the present invention;

[0041] Fig. 9 It is a schematic structural diagram of the transmission wheel of the present invention.

[0042] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0043] 1. Frame; 2. Guide rod; 3. Limit plate; 4. Inner plate; 5. Lifting plate a; 6. Lifting plate b; 7. First roller support; 8. Second roller support; 9. Conveying motor; 10. Tensioning frame a; 11. Tensioning frame b; 12. Third roller support; 13. Follower seat; 14. Annular conveyor belt; 15. Side plate; 16. Angle adjustment push rod; 17. Linear drive module; 18. Conveying shaft; 19. Transmission wheel; 20. Limit spring; 21. Guide shaft groove; 22. Limit ring groove; 23. Limit part; 24. Conveying plate; 25. Guide column; 26. Tension spring; 27. Adjusting motor; 28. Distance adjustment screw. DETAILED DESCRIPTION

[0044] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0045] The present invention provides the following preferred embodiments

[0046] like Figure 1-9 As shown, a sand and gravel aggregate loading conveyor includes a frame 1 and further includes:

[0047] The screw pitch adjustment module is installed between the inner surfaces of the frame 1. The screw pitch adjustment module is transmission-connected with a limit plate 3. The limit plate 3 is hinged with an inner plate 4. The inner wall of the inner plate 4 is slidably connected with a lifting plate a5.

[0048] Two lifting plates b6 that are arranged in mirror image and have adjustable positions and angles, and both lifting plates b6 are connected to the frame 1;

[0049] The inner wall of the frame 1 is slidably connected to two side panels 15, and the two side panels 15 are hinged to the frame 1. Angle adjustment push rods 16 are hinged between the two side panels 15 and the frame 1. The two side panels 15 are slidably connected to the two lifting plates b6 respectively. Linear drive modules 17 are installed on the two side panels 15, and the two linear drive modules 17 are respectively connected to the two lifting plates b6 in transmission.

[0050] The linear drive module 17 includes a transmission screw rotatably connected to the side plate 15, the transmission screw is transmission-connected to a lifting plate b6 at a corresponding position, a motor is mounted on the side plate 15, and the output shaft end of the motor is fixedly connected to the transmission screw.

[0051] When in use, the layout positions and layout angles of the lifting plates a5 and b6 are adjusted synchronously, and then the feeding height of the sand and gravel aggregate loading conveyor for the sand and gravel aggregate and the conveying stroke of the sand and gravel aggregate loading conveyor are adjusted;

[0052] When the device is not in use, the lifting plate a5 and the lifting plate b6 are fully reset and close to each other on the frame 1, which facilitates the flexible layout, rapid transfer and flexible transportation of the conveying device;

[0053] A first roller support member 7 is installed between the opposite surfaces of the two lifting plates b6, two staggered second roller support members 8 are installed between the inner surfaces of the frame 1, a conveying motor 9 is installed on the side of the frame 1, and the output shaft end of the conveying motor 9 is fixedly connected to a second roller support member 8;

[0054] Three tensioning frames a10 distributed in a linear array and two tensioning frames b11 distributed in a linear array are slidably connected between the inner surfaces of the frame 1;

[0055] The tensioning frame a10 and the tensioning frame b11 are staggered on the frame 1;

[0056] A third roller support member 12 is installed between the inner surfaces of each tensioning frame a10 and each tensioning frame b11, and a driven seat 13 is slidably connected to the inner wall of the limiting plate 3 and the positions corresponding to each tensioning frame a10 and each tensioning frame b11, and the driven seat 13 is connected to the third roller support member 12;

[0057] Elastic tensioning members are installed on the frame 1 and at positions corresponding to each tensioning frame a10 and each tensioning frame b11;

[0058] A group of regularly distributed annular conveyor belts 14 are provided, each of which is connected to the first roller support member 7, the second roller support member 8 and the third roller support member 12, and filter gaps with adjustable widths are fixedly arranged between the annular conveyor belts 14.

[0059] The screw pitch adjustment module includes a group of guide rods 2 installed between the inner surfaces of the frame 1, each guide rod 2 is slidably connected to the limit plate 3, and a pitch adjustment screw 28 is rotatably connected between the inner surfaces of the frame 1. The pitch adjustment screw 28 is transmission-connected to the limit plate 3. An adjusting motor 27 is installed on the side of the frame 1, and the output shaft end of the adjusting motor 27 is fixedly connected to the pitch adjustment screw 28.

[0060] When in use, when the conveyor performs a single conveying mode of sand and gravel aggregates, under the driving action of the screw distance adjustment module, the limit plate 3 is sufficiently close to the center line of the frame 1, and the spacing between the two transmission wheels 19 and the spacing between the two annular conveyor belts 14 are adjusted to the minimum. When the spacing between the two annular conveyor belts 14 is adjusted to the minimum, the width of the filter slot in the conveyor is adjusted to the minimum. The width of the filter slot is limited, so that the conveyor can perform a single mode of conveying sand and gravel aggregates;

[0061] When the conveyor is required to filter the sand and gravel aggregates simultaneously while conveying the sand and gravel aggregates, the spacing between the two transmission wheels 19 on each conveying shaft 18 is limited by adjusting the position of the limit plate 3 according to the filtering specifications and filtering particle size requirements of the sand and gravel aggregates. By adjusting the spacing between the two transmission wheels 19 on each conveying shaft 18, the width of the filter seams between the two annular conveyor belts 14 can be accurately limited, thereby adjusting the filtering specifications of the sand and gravel aggregates of the conveyor in the conveying mode and realizing the conveying and filtering of the sand and gravel aggregates of the conveyor simultaneously.

[0062] The first roller support member 7, the second roller support member 8 and the third roller support member 12 all include a conveying shaft rod 18, both ends of the conveying shaft rod 18 in the first roller support member 7 are rotatably connected to the lifting plate b6, both ends of the conveying shaft rod 18 in the second roller support member 8 are rotatably connected to the frame 1, the lifting plate a5 and the lifting plate b6 are rotatably connected to the conveying shaft rod 18 in the third roller support member 12, the output shaft end of the conveying motor 9 is fixedly connected to the conveying shaft rod 18 in the second roller support member 8, and a transmission wheel 19 matching the endless conveyor belt 14 is connected to the conveying shaft rod 18 and the position corresponding to each endless conveyor belt 14;

[0063] A guide shaft groove 21 slidably connected to the conveying shaft rod 18 is fixedly provided inside the driving wheel 19 . The cross sections of the conveying shaft rod 18 and the guide shaft groove 21 are both regular polygons. A limiting ring groove 22 is fixedly provided on the driving wheel 19 .

[0064] When in use, the regular polygonal cross-section of the conveying shaft 18 and the guide shaft groove 21 is set so that after the distance between the two transmission wheels 19 is changed, the conveying shaft 18 can continuously drive the transmission wheels 19;

[0065] Limit springs 20 are sleeved on the conveying shaft 18 and at the positions corresponding to the positions between each pair of transmission wheels 19. The two outermost transmission wheels 19 in the first roller support member 7 are rotatably connected to a lifting plate b6 and a limit plate 3 respectively. The two outermost transmission wheels 19 in the second roller support member 8 are rotatably connected to the frame 1 and the limit plate 3 respectively. The tensioning frame a10 and the tensioning frame b11 are rotatably connected to the leftmost transmission wheel 19 in a third roller support member 12, and each driven seat 13 is rotatably connected to the rightmost transmission wheel 19 in a third roller support member 12.

[0066] When in use, the limiting plate 3 is set to limit the compression amplitude of the limiting spring 20 between the two transmission wheels 19. When the limiting plate 3 is away from the transmission wheel 19, under the action of the limiting spring 20, the spacing between the two transmission wheels 19 is driven to change and the spacing between the two transmission wheels 19 is increased. When the spacing between the two transmission wheels 19 is changed, the spacing between the two annular conveyor belts 14 is changed, and finally the size of the filter gap between the two annular conveyor belts 14 is changed.

[0067] The annular conveyor belt 14 includes a limiting portion 23 , the shape of which matches the shape of the limiting ring groove 22 , and a conveying plate 24 is mounted on the limiting portion 23 , the width of which is 1.2 times the width of the limiting portion 23 .

[0068] By setting the limiting portion 23 , the endless conveyor belt 14 can be effectively limited by the driving wheel 19 .

[0069] The elastic tensioning member includes guide posts 25 installed on two sides of the frame 1 . The lifting plates a5 and b6 are both slidably connected to the guide posts 25 at corresponding positions. A tensioning spring 26 is sleeved on the guide posts 25 .

[0070] By providing the elastic tensioning member, the endless conveyor belt 14 can be kept tensioned at all times during the process of changing the layout shape of the endless conveyor belt 14 .

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand and gravel aggregate loading conveyor, comprising a frame (1), characterized in that: Also includes: A screw pitch adjustment module is installed between the inner surfaces of the frame (1), the screw pitch adjustment module is drivingly connected to a limit plate (3), the limit plate (3) is hinged with an inner plate (4), and the inner wall of the inner plate (4) is slidably connected to a lifting plate a (5); Two lifting plates b (6) are arranged in mirror image and are adjustable in position and angle. Both of the lifting plates b (6) are connected to the frame (1). A first roller support member (7) is installed between the opposite surfaces of the two lifting plates b (6). Two second roller support members (8) are installed between the inner surfaces of the frame (1) in an offset manner. A conveying motor (9) is installed on the side of the frame (1). The output shaft end of the conveying motor (9) is fixedly connected to one of the second roller support members (8); Three tensioning frames a (10) and two tensioning frames b (11) distributed in a linear array are slidably connected between the inner surfaces of the frame (1), a third roller support member (12) is installed between the inner surfaces of each tensioning frame a (10) and each tensioning frame b (11), a driven seat (13) is slidably connected to the inner wall of the limit plate (3) and corresponding to the position of each tensioning frame a (10) and each tensioning frame b (11), the driven seat (13) is connected to the third roller support member (12), and an elastic tensioning member is installed on the frame (1) and corresponding to the position of each tensioning frame a (10) and each tensioning frame b (11); A group of regularly distributed annular conveyor belts (14), each of which is connected to a first roller support member (7), a second roller support member (8) and a third roller support member (12), and a filter slot with adjustable width is fixedly arranged between each of the annular conveyor belts (14).

2. A sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The inner wall of the frame (1) is slidably connected to two side panels (15), the two side panels (15) are hinged to the frame (1), an angle adjustment push rod (16) is hinged between the two side panels (15) and the frame (1), the two side panels (15) are slidably connected to the two lifting plates b (6) respectively, and a linear drive module (17) is installed on the two side panels (15), and the two linear drive modules (17) are respectively transmission-connected to the two lifting plates b (6).

3. The sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The linear drive module (17) includes a transmission screw that is rotatably connected to the side plate (15), and the transmission screw is transmission-connected to a lifting plate b (6) at a corresponding position. A motor is installed on the side plate (15), and the output shaft end of the motor is fixedly connected to the transmission screw.

4. The sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The screw pitch adjustment module comprises a group of guide rods (2) installed between the inner surfaces of the frame (1), each of the guide rods (2) is slidably connected to the limit plate (3), a pitch adjustment screw (28) is rotatably connected between the inner surfaces of the frame (1), the pitch adjustment screw (28) is transmission-connected to the limit plate (3), an adjustment motor (27) is installed on the side of the frame (1), and the output shaft end of the adjustment motor (27) is fixedly connected to the pitch adjustment screw (28).

5. The sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The first roller support member (7), the second roller support member (8) and the third roller support member (12) all include a conveying shaft (18), both ends of the conveying shaft (18) in the first roller support member (7) are rotatably connected to the lifting plate b (6), both ends of the conveying shaft (18) in the second roller support member (8) are rotatably connected to the frame (1), the lifting plate a (5) and the lifting plate b (6) are rotatably connected to the conveying shaft (18) in the third roller support member (12), the output shaft end of the conveying motor (9) is fixedly connected to the conveying shaft (18) in the second roller support member (8), and the conveying shaft (18) and the position corresponding to each circular conveyor belt (14) are connected to the circular conveyor belt ( 14) matched transmission wheels (19), limit springs (20) are sleeved on the conveying shaft (18) and at the positions corresponding to the positions between the two transmission wheels (19), the two outermost transmission wheels (19) in the first roller support member (7) are respectively rotatably connected to a lifting plate b (6) and a limit plate (3), the two outermost transmission wheels (19) in the second roller support member (8) are respectively rotatably connected to the frame (1) and the limit plate (3), the tensioning frame a (10) and the tensioning frame b (11) are both rotatably connected to the leftmost transmission wheel (19) in a third roller support member (12), and each of the driven seats (13) is rotatably connected to the rightmost transmission wheel (19) in a third roller support member (12).

6. The sand and gravel aggregate loading conveyor according to claim 5, characterized in that: A guide shaft groove (21) is fixedly provided inside the transmission wheel (19) and is slidably connected to the conveying shaft rod (18). The cross sections of the conveying shaft rod (18) and the guide shaft groove (21) are both regular polygons. A limiting ring groove (22) is fixedly provided on the transmission wheel (19).

7. The sand and gravel aggregate loading conveyor according to claim 6, characterized in that: The annular conveyor belt (14) comprises a limiting portion (23), the shape of the limiting portion (23) is adapted to the shape of the limiting ring groove (22), a conveying plate (24) is mounted on the limiting portion (23), and the width of the conveying plate (24) is 1.2 to 1.3 times the width of the limiting portion (23).

8. The sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The elastic tensioning member comprises guide posts (25) mounted on two side surfaces of the frame (1); the lifting plate a (5) and the lifting plate b (6) are both slidably connected to the guide posts (25) at corresponding positions; and a tensioning spring (26) is sleeved on the guide posts (25).

9. The sand and gravel aggregate loading conveyor according to claim 1, characterized in that: The tensioning frame a (10) and the tensioning frame b (11) are arranged on the frame (1) in a staggered manner.

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