Powder feeding device for concrete mixing plant

Abstract

The invention relates to the technical field of powder feeding, and discloses a powder feeding device for a concrete mixing plant, which comprises an outer cylinder, a discharging hopper is arranged at the bottom, a top cover is arranged at the top, a feeding structure is arranged on the top cover, a bag opening connecting structure is arranged at an inlet of the feeding structure, and a crushing and screening structure is slidably arranged in the outer cylinder. The crushing and screening structure comprises a screening module, a crushing module and a vibration dust removal module; the vibration dust removal module comprises a ratchet wheel rod and a supporting rod which are fixed to the outer cylinder, ratchets are arranged at the bottom of the ratchet wheel rod, the screening module is provided with a screen, one end of a rotating shaft of the screen is movably connected to the ratchet wheel rod in a sleeving mode and provided with a transmission ratchet wheel meshed with the ratchet wheel rod, and the other end of the rotating shaft of the screen is movably connected to the supporting rod in a sleeving mode and provided with a supporting plate; and a supporting spring is arranged between the supporting plate and the supporting rod. Compared with the prior art, the dust removal device has the advantage that residual powder is shaken off through vibration generated by the vibration dust removal module.

Description

Technical Field

[0001] The present invention relates to the technical field of powder feeding, and specifically refers to a powder feeding device for a concrete mixing plant. Background Art

[0002] The main function of a concrete mixing plant is to centrally mix concrete. Powdered materials such as cement are generally transported into the concrete mixing plant through a powder feeding device, thereby participating in the mixing of concrete. Through the powder feeding device, the transportation and metering of materials can be completed quickly and accurately, the proportion of each powder and component in the concrete can be controlled, and the performance of the finished concrete can be improved and controlled. However, the existing powder feeding devices on the market generally only have the function of transporting and transferring powder. During the temporary storage of cement materials, local caking may occur due to reasons such as moisture absorption. When these cement lumps enter the concrete mixing plant together with the powder, it may have some impacts on the concrete mixing effect. When the cement powder passes through the screening of the powder feeding device, a large amount of powder will remain on the screen, resulting in an error in the powder content entering the concrete mixing plant, which affects the mixing effect and the quality of the finished product of the concrete. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a powder feeding device for a concrete mixing plant, which screens and crushes the powder entering the concrete mixing plant through the powder feeding device, prevents caking from entering the concrete mixing plant, and at the same time performs dust removal on the screen through mechanical vibration, reduces the residual powder, and reduces the weighing error of the powder.

[0004] To solve the above technical problem, the technical solution provided by the present invention is as follows: A powder feeding device for a concrete mixing plant, comprising: An outer cylinder, with a discharge hopper at the bottom, a top cover at the top, and a feeding structure provided on the top cover. A bag mouth connection structure is provided at the inlet of the feeding structure. A crushing and screening structure is provided inside the outer cylinder. The crushing and screening structure includes a screening module, a crushing module, and a vibration dust removal module. The screening module and the crushing module are driven by a driving module provided on the outer cylinder; The vibration dust removal module includes a ratchet rod and a support rod fixed on the outer cylinder. The bottom of the ratchet rod is provided with ratchet teeth. The screening module is provided with a screen. One end of the rotating shaft of the screen is movably sleeved on the ratchet rod, and a transmission ratchet meshing with the ratchet teeth of the ratchet rod is provided. The other end is movably sleeved on the support rod, and a support plate is provided. A support spring is provided between the support plate and the support rod. When the screen rotates and moves downward through the transmission ratchet, it is bounced back by the support spring.

[0005] Furthermore, a screening sleeve is arranged outside the screen. The crushing module includes a crushing rod disposed inside the screening sleeve and a crushing sleeve rotatably arranged on the screening sleeve. The rotating shaft of the crushing rod is rotatably arranged on the rotating shaft of the screen and is connected to the crushing sleeve through a connecting rod.

[0006] Furthermore, the driving module includes an upper gear ring and a lower gear ring rotatably arranged on the outer cylinder. An equipment box is arranged on the side wall of the outer cylinder, and a U-shaped frame is fixed inside the equipment box. An upper transmission gear meshing with the upper gear ring and a lower transmission gear meshing with the lower gear ring are rotatably arranged on the U-shaped frame. A driving motor is arranged on the U-shaped frame. A driving bevel gear is connected to the driving shaft of the driving motor, and the driving bevel gear meshes with the bevel gears formed by the opposite faces of the upper transmission gear and the lower transmission gear at the same time. After the driving motor is started, the upper gear ring and the lower gear ring rotate in opposite directions. The screening sleeve is slidably sleeved on the lower transmission gear up and down, and the crushing sleeve is slidably sleeved on the upper gear ring up and down.

[0007] Furthermore, the feeding structure includes a mounting bracket fixed on the top cover and a feeding wheel rotatably arranged on the mounting bracket. A feeding channel is arranged on the feeding wheel, and the outlet of the feeding channel is blocked by the mounting bracket to prevent the dust of the powder in the outer cylinder from diffusing to the outside. A feeding chute is arranged at the inlet, and a supporting plate and a bag mouth connection structure are arranged at the feeding chute. After the feeding wheel rotates, the outlet of the feeding channel is separated from the mounting bracket and is arranged downward, so that the powder enters the outer cylinder through the feeding channel.

[0008] Furthermore, a chassis is arranged on the mounting bracket. The chassis is arranged on one side of the feeding wheel and internally slidably provided with a transmission rack. The transmission rack is arranged vertically and meshes with a runner gear arranged on the rotating shaft of the feeding wheel. A feeding motor is arranged inside the chassis, and a feeding gear meshing with the transmission rack is arranged on the driving shaft of the feeding motor.

[0009] Furthermore, the feeding gear is an incomplete gear. A section of ratchet teeth is arranged on the other side of the transmission rack. The distance of the ratchet teeth is shorter than that of the transmission rack, and a return spring is arranged between the bottom of the transmission rack and the chassis. A check ratchet block is slidably arranged inside the chassis, and a check spring is arranged between one side of the check ratchet block and the chassis, and the other side meshes with the ratchet teeth of the transmission rack. A pressing rod is slidably arranged on the chassis. One end of the pressing rod is connected to the check ratchet block, and the other end is arranged outside the chassis and provided with a grip. After the grip is pushed, the check ratchet block is pressed and separated from the transmission rack. The transmission rack is bounced back to its original position by the return spring, and the feeding wheel rotates back.

[0010] Further, the bag mouth connection structure includes a lower clamping ring fixed inside the feeding trough opening and an upper clamping ring slidably arranged inside the feeding trough opening. The upper clamping ring is movably sleeved at the inlet of the feeding channel. A self-locking module is rotatably arranged on the side wall of the feeding trough opening. A bag clamping handle is fixed on the self-locking module, and a connecting rod is hinged on the bag clamping handle. The other end of the connecting rod is hinged to the upper clamping ring.

[0011] Further, the self-locking module includes a self-locking box rotatably arranged on the feeding wheel and an unlocking rod slidably arranged inside the bag clamping handle. A positioning block is arranged inside the self-locking box, and a self-locking ratchet is arranged inside the rotating shaft of the self-locking box. A wedge block groove is arranged on the positioning block. A self-locking spring is arranged between one side and the self-locking box. The other side is movably sleeved inside the rotating shaft of the self-locking box and meshes with the self-locking ratchet. An unlocking spring is arranged between one end of the unlocking rod and the bag clamping handle, and a wedge block is arranged at the other end. The inclined surface of the wedge block abuts against the inclined surface of the wedge block groove. After pressing the unlocking rod, the inclined surface of the wedge block slides with the inclined surface of the wedge block groove, and the positioning block compresses the self-locking spring and separates from the self-locking ratchet.

[0012] Further, the crushing module includes a crushing rod, and the rotating shaft of the crushing rod is rotatably arranged on the rotating shaft of the sieve mesh. A scraper is arranged on one side of the crushing rod. The scraper is an elastic structure body and abuts against the sieve mesh on one side.

[0013] The advantages of the present invention compared with the prior art are as follows: 1. The present invention is provided with a screening module and a crushing module, and through the reverse rotation between the two, the screening effect of the powder material is improved, and the crushing ability for caking is enhanced. The powder material entering the concrete mixing station is more uniform, and the mixing and blending effect is better; 2. The present invention is provided with a vibration dust removal module. Through the vibration dust removal module, the screening module and the crushing module automatically perform reciprocating motion and impact in the up and down directions during rotation, thereby generating vibration, vibrating and shaking off the residual powder material during their own screening process, reducing the powder material feeding error, enhancing the accuracy of the feeding ratio, and the screening module is not easily blocked and has a longer service life; 3. The present invention is provided with a feeding structure, and through the feeding structure, the bagged powder material can be jolted up and down during the feeding process, making it more convenient for the powder material to enter, and the residual amount of the powder material in the bag is less, and it is more convenient to use; 4. The present invention is provided with a bag mouth connection structure, which can be quickly connected to the bag mouth of the packaging bag filled with powder material, and in cooperation with the feeding structure, it realizes dust-free feeding of the powder material, avoids powder material dusting and diffusion pollution during the feeding process, and is more environmentally friendly, safe and convenient to use. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present invention.

[0015] Figure 2It is a schematic cross-sectional view of the present invention.

[0016] Figure 3 It is a schematic structural view of the crushing and screening structure and the drive module of the present invention.

[0017] Figure 4 It is a schematic expanded structural view of the crushing and screening structure of the present invention.

[0018] Figure 5 It is a schematic structural view of the screening module and the crushing module of the present invention.

[0019] Figure 6 It is a schematic structural view of the top cover structure of the present invention.

[0020] Figure 7 It is a schematic cross-sectional view of the top cover of the present invention.

[0021] Figure 8 It is a schematic expanded structural view of the feeding structure of the present invention.

[0022] Figure 9 It is a schematic cross-sectional view of the feeding structure of the present invention Figure 1 。

[0023] Figure 10 It is a schematic structural view of the feeding structure of the present invention Figure 2 。

[0024] Figure 11 It is a schematic structural view of the bag mouth connection structure of the present invention.

[0025] Figure 12 It is a schematic expanded structural view of the self-locking module of the present invention.

[0026] Figure 13 It is a schematic cross-sectional view of the self-locking module of the present invention.

[0027] Figure 14 It is a schematic structural view of the quantitative feeding module of the present invention Figure 1 。

[0028] Figure 15 It is a schematic structural view of the quantitative feeding module of the present invention Figure 2 。

[0029] As shown in the figure: 1. Outer cylinder, 11. Workbench, 12. Top cover, 13. Equipment box, 14. Discharge hopper, 15. Discharge valve, 2. Crushing and screening structure, 21. Screening module, 211. Screen mesh, 212. Screening sleeve, 22. Crushing module, 221. Crushing rod, 222. Scraper, 223. Crushing sleeve, 23. Vibration dust removal module, 231. Ratchet rod, 232. Driving ratchet, 233. Support rod, 234. Support plate, 235. Support spring, 236. Upper connecting beam, 237. Lower connecting beam, 3. Driving module, 31. Driving motor, 32. U-shaped frame, 33. Driving bevel gear, 34. Upper transmission gear, 35. Lower transmission gear, 36. Upper gear ring, 37. Lower gear ring, 4. Quantitative feeding module, 41. Material collecting hopper, 42. Dividing cone, 43. Storage hopper, 431. Hopper sleeve, 432. Feeding valve, 44. Weighing sensor, 5. Feeding structure, 51. Feeding wheel, 52. Mounting frame, 53. Chassis, 54. Automatic feeding module, 541. Runner gear, 542. Feeding gear, 543. Transmission rack, 544. Return spring, 545. Check ratchet, 546. Check spring, 547. Pressing rod, 548. Feeding motor, 6. Bag mouth connection structure, 61. Upper clamping ring, 62. Lower clamping ring, 63. Bag clamping handle, 64. Connecting rod, 65. Self-locking module, 651. Self-locking box, 652. Positioning block, 6521. Wedge slot, 653. Self-locking ratchet, 654. Unlocking rod, 6541. Wedge, 6542. Unlocking button, 655. Unlocking spring, 656. Self-locking spring. Detailed implementation mode

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Combined with the attached Figure 1 and the attached Figure 2As shown in the figure, a powder feeding device for a concrete mixing plant is arranged on the top of the concrete mixing plant for use. It includes an outer cylinder 1 arranged on the top of the concrete mixing plant. A discharge hopper 14 is arranged at the bottom of the outer cylinder 1, and a discharge valve 15 is arranged at the outlet of the discharge hopper 14. A top cover 12 is arranged at the top, and a workbench 11 is arranged in a circumferential direction along the outside of the top cover 12. A guardrail is arranged outside the workbench 11. A feeding structure 5 is arranged on the top cover 12, and a bag mouth connection structure 6 is arranged at the inlet of the feeding structure 5. Through the feeding structure 5 and the bag mouth connection structure 6, the bagged powder is transferred into the outer cylinder 1 from the packaging bag without dust. A crushing and screening structure 2 is also arranged in the outer cylinder 1. The crushing and screening structure 2 includes a screening module 21, a crushing module 22 and a vibration dust removal module 23. A quantitative feeding module 4 is arranged in the outer cylinder 1 between the crushing and screening structure 2 and the feeding structure 5. An equipment box 13 is arranged on the side wall of the outer cylinder 1, and a driving module 3 is arranged in the equipment box 13. The screening module 21 and the crushing module 22 are respectively drivingly connected with the driving module 3 and rotate in opposite directions after being driven by the driving module 3. Specifically: Combined with the attached Figure 2 drawing, the attached Figure 3 As shown in the figure, the driving module 3 includes an upper gear ring 36 and a lower gear ring 37 rotatably arranged on the outer cylinder 1 (the upper gear ring 36 and the lower gear ring 37 are horizontally arranged and are connected to the side wall of the outer cylinder 1 through bearings on the upper and lower sides). Spline grooves are arranged on the inner sides of the upper gear ring 36 and the lower gear ring 37. A U-shaped frame 32 is fixed in the equipment box 13. An upper transmission gear 34 meshing with the upper gear ring 36 and a lower transmission gear 35 meshing with the lower gear ring 37 are rotatably arranged inside the U-shaped frame 32. A driving motor 31 is arranged on the U-shaped frame 32. A driving bevel gear 33 is connected to the driving shaft of the driving motor 31, and the driving bevel gear 33 meshes with the bevel gears formed by the opposite faces of the upper transmission gear 34 and the lower transmission gear 35 at the same time. After the driving motor 31 is started, through gear transmission, the upper gear ring 36 and the lower gear ring 37 rotate in opposite directions inside the outer cylinder 1.

[0032] Combined with the attached Figure 2 drawing, the attached Figure 3 drawing, the attached Figure 4 drawing, the attached Figure 5As shown, the screening module 21 includes a horizontally arranged screen 211. A rotating shaft is provided in the middle of the screen 211, and a screening sleeve 212 is provided on the outside. A spline is provided on the outside of the screening sleeve 212, and it is slidably sleeved up and down in the lower transmission gear 35. The crushing module 22 includes a pair of crushing rods 221 arranged in the screening sleeve 212 and a crushing sleeve 223 rotatably provided on the screening sleeve 212. The rotating shafts of the crushing rods 221 are rotatably provided on the rotating shaft of the screen 211, and a connecting rod is connected between the top of the rotating shaft and the crushing sleeve 223. A scraper 222 is provided on one side of the crushing rod 221. The scraper 222 is an elastic structure and is abutted against the screen 211 on one side. A spline is provided on the outside of the crushing sleeve 223, and it is slidably sleeved up and down in the upper gear ring 36.

[0033] In the above description, after the driving motor 31 is started, under the action of the driving bevel gear 33, the upper transmission gear 34 and the lower transmission gear 35 rotate in opposite directions, and drive the upper gear ring 36 and the lower gear ring 37 to rotate in opposite directions in the outer cylinder 1, so that the screen 211 rotates following the lower gear ring 37 to screen and impact the falling powder. And the crushing rod 221 rotates following the upper gear ring 36 to impact and crush the powder agglomerates left after screening in the screen 211, and the scraper 222 scrapes the screen 211 to reduce powder residue. During the rotation, the screening module 21 and the crushing module 22 can slide up and down in the upper gear ring 36 and the lower gear ring 37. It should be noted that the rotation speeds between the screening module 21 and the crushing module 22 can be changed by adjusting the sizes of the gears, so that the two rotate at unequal speeds (in the figure, they rotate at equal speeds in opposite directions).

[0034] Combined with the attached Figure 2 、attached Figure 3 、attached Figure 4 As shown, the vibration dust removal module 23 includes a ratchet rod 231 fixed to the outer cylinder 1 through an upper connecting beam 236 and a support rod 233 fixed to the outer cylinder 1 through a lower connecting beam 237. A ratchet tooth is provided at the bottom of the ratchet rod 231 (the ratchet teeth are circumferentially arranged and connected end to end on the ratchet rod 231, and it has an inclined surface and a vertical surface). One end of the rotating shaft of the screen 211 is movably sleeved on the ratchet rod 231, and a transmission ratchet 232 meshing with the ratchet teeth of the ratchet rod 231 is provided on the outer wall. The other end is movably sleeved on the support rod 233, and a circle of support plates 234 is provided on the outer wall. A support spring 235 is provided between the support plates 234 and the support rod 233.

[0035] As described above, the sieve 211 rotates after being driven by the driving module 3. During the rotation, the inclined surfaces of the ratchet teeth of the ratchet lever 231 are in contact with and slide against the inclined surfaces of the transmission ratchet 232, causing the sieve 211 to gradually move downward, compressing the support spring 235. After the vertical surfaces of the ratchet teeth of the ratchet lever 231 are aligned with the vertical surfaces of the transmission ratchet 232, the support spring 235 quickly returns and elongates, quickly pushing up the sieve 211, and the transmission ratchet 232 collides with the ratchet lever 231, thereby causing the sieve 211 to vibrate, shaking off the attached residual powder, and at the same time throwing up the powder lumps left in the sieve 211 upward, enhancing the impact between the lumps and the sieve 211 and the crushing rod 221, and strengthening the crushing effect. During this process, the crushing module 22 moves up and down and vibrates following the screening module 21, and vibrates and shakes off the residual powder on the crushing module 22, the upper connecting beam 236 and the lower connecting beam 237, thereby reducing the residual amount of powder feeding, narrowing the powder feeding error, and making the powder feeding amount and the concrete mix ratio more accurate.

[0036] Combined with the attached Figure 2 、attached Figure 14 、attached Figure 15 As shown, the metering feeding module 4 includes a material collecting hopper 41 fixed inside the outer cylinder 1, a material distributing cone 42 fixed on the top of the ratchet lever 231, and a storage hopper 43 movably sleeved inside the outer cylinder 1. The material distributing cone 42 is arranged directly below the outlet of the material collecting hopper 41. A hopper sleeve 431 is provided in the middle of the storage hopper 43, and the hopper sleeve 431 is slidably arranged on the hopper sleeve 431 and placed on a weighing sensor 44 provided on the hopper sleeve 431. Four funnel-shaped storage bins are evenly arranged along the circumference of the storage hopper 43, and feeding valves 432 are respectively provided at the bottoms of the storage bins.

[0037] As described above, after the powder enters the outer cylinder 1, it is collected by the material collecting hopper 41 above the material distributing cone 42, and is evenly dispersed into the four storage bins of the storage hopper 43 through the material distributing cone 42. Through the weighing sensor 44, the weight A of the existing powder in the storage hopper 43 can be obtained. After the feeding valve 432 is opened, the powder in the storage bin falls on the non-center of the sieve 211, which is convenient for some lumps to be broken by the crushing rod 221. The feeding speed can be controlled by the number of opened feeding valves 432. After the feeding is completed, through the weighing sensor 44, the weight B of the remaining powder in the storage hopper 43 can be obtained, and the powder feeding amount is C = A - B.

[0038] Combined with the attached Figure 6 、attached Figure 7As shown in the figure, the feeding structure 5 includes a mounting frame 52 fixed on the top cover 12, and a feeding wheel 51 rotatably arranged on the mounting frame 52. A machine box 53 is arranged on the mounting frame 52 on one side of the feeding wheel 51, and the machine box 53 is connected to the rotating shaft of the feeding wheel 51 through an automatic feeding module 54. A feeding channel 512 is arranged inside the feeding wheel 51 (the feeding channel 512 is a tubular slot structure that gradually widens from the inlet to the outlet), and the outlet of the feeding channel 512 is blocked by the mounting frame 52, and a feeding slot 511 is arranged at the inlet. A supporting plate 513 and a bag mouth connection structure 6 are arranged at the feeding slot 511.

[0039] In the above description, after the feeding wheel 51 rotates through the automatic feeding module 54, the outlet of the feeding channel 512 is separated from the mounting frame 52 and exposed, and is arranged downward. The bagged powder connected to the bag mouth connection structure 6 is lifted by the supporting plate 513, and after being turned upward by about 135°, the powder in the bag enters the outer cylinder 1 through the feeding channel 512 and is poured into the material collecting hopper 41. After the feeding wheel 51 rotates downward in the reverse direction, the outlet of the feeding channel 512 is blocked by the mounting frame 52 again to prevent the powder dust in the outer cylinder 1 from rising and leaking backward through the feeding channel 512, causing dust diffusion and pollution in the outside world, and affecting the health and safety of the operator and the environment.

[0040] Combined with the attached Figure 8 、attached Figure 9 、attached Figure 10 As shown in the figure, the automatic feeding module 54 includes a driving rack 543 slidably arranged in the machine box 53 and a feeding motor 548 fixed in the machine box 53. The driving rack 543 is arranged vertically, and a ratchet section is arranged on one side (no ratchet section is arranged at the top section of the driving rack 543), and the other side meshes with a runner gear 541 arranged on the rotating shaft of the feeding wheel 51. A return spring 544 is arranged between the bottom and the machine box 53. A feeding gear 542 meshing with the driving rack 543 is arranged on the driving shaft of the feeding motor 548. The feeding gear 542 is an incomplete gear, and the number of teeth is one-twelfth of the number of teeth of the runner gear 541, that is, when the feeding gear 542 rotates one circle, the runner gear 541 rotates 30°. A check ratchet 545 and a pressing rod 547 are slidably arranged in the machine box 53. A check spring 546 is arranged between one side of the check ratchet 545 and the machine box 53, and the other side meshes with the ratchet teeth of the driving rack 543. After meshing, the driving rack 543 cannot slide upward. One end of the pressing rod 547 is connected to the check ratchet 545, and the other end is arranged outside the machine box 53 and is provided with a grip.

[0041] In the above description, after the feeding motor 548 is started, the feeding gear 542 rotates and intermittently meshes with the transmission rack 543, and intermittently drives the transmission rack 543 to move downward. During the downward movement, the runner gear 541 drives the feeding wheel 51 to rotate intermittently (the feeding wheel 51 rotates 30° each time), compresses the return spring 544, and at the same time meshes with the check ratchet 545 and cannot slide upward, so that the feeding wheel 51 drives the material supporting plate 513 to lift the bagged powder for feeding. After the feeding wheel 51 rotates 120°, the check ratchet 545 disengages from the ratchet section of the transmission rack 543. The transmission rack 543 continues to mesh with the rotating feeding gear 542, moves downward a certain distance, disengages from the feeding gear 542, and is pushed back by the compressed return spring 544 and impacts on the check ratchet 545, thereby driving the feeding wheel 51 to reciprocate within the range of 120° to 150°, and jolting the bagged powder on the material supporting plate 513 back and forth to promote the powder in the bag to flow out and reduce the powder residue in the bag and the feeding channel 512.

[0042] After jolting many times and the powder in the bag is completely poured out, stop the feeding motor 548, and push the pressing rod 547 to make the check ratchet 545 compress the check spring 546 and disengage from the transmission rack 543. The transmission rack 543 is pushed back by the compressed return spring 544 and drives the feeding wheel 51 to rotate back to its original position.

[0043] Combined with the attached Figure 11 As shown, the bag mouth connection structure 6 includes a lower clamping ring 62 fixed in the feeding trough opening 511 and an upper clamping ring 61 slidably arranged in the feeding trough opening 511. The upper clamping ring 61 is movably sleeved at the inlet of the feeding channel 512, and the clamping surfaces of the upper clamping ring 61 and the lower clamping ring 62 are respectively provided with matching stepped surfaces. A self-locking module 65 is rotatably arranged on the side wall of the feeding trough opening 511. A bag clamping handle 63 is fixed on the self-locking module 65, and a connecting rod 64 is hinged on the bag clamping handle 63. The other end of the connecting rod 64 is hinged to the upper clamping ring 61.

[0044] Combined with the attached Figure 12 、attached Figure 13As shown, the self-locking module 65 includes a self-locking box 651 rotatably arranged on the feeding wheel 51 and an unlocking rod 654 slidably arranged in the bag clamping handle 63. A positioning block 652 is arranged in the self-locking box 651, and a self-locking ratchet wheel 653 is arranged in the rotating shaft of the self-locking box 651. A wedge block groove 6521 is arranged on the positioning block 652. A self-locking spring 656 is arranged between one side and the self-locking box 651, and a ratchet wheel is arranged on the other side. The ratchet wheel is movably sleeved in the rotating shaft of the self-locking box 651 and meshes with the self-locking ratchet wheel 653. One end of the unlocking rod 654 is provided with an unlocking button 6542. An unlocking spring 655 is arranged between the unlocking button 6542 and the bag clamping handle 63. The other end is provided with a triangular wedge block 6541. The wedge block 6541 is arranged in the wedge block groove 6521, and the inclined surface abuts against the inclined surface of the wedge block groove 6521 (the size of the wedge block groove 6521 is larger than the size of the wedge block 6541). After pressing the unlocking button 6542, the wedge block 6541 pushes the positioning block 652, and the positioning block 652 is separated from the self-locking ratchet wheel 653.

[0045] In the above description, after opening the bag mouth of the powder bag, it passes through the lower clamping ring 62 and is sleeved on the upper clamping ring 61. Pull the bag clamping handle 63, and driven by the connecting rod 64, the upper clamping ring 61 moves downward, and the bag mouth is clamped and fixed between the upper clamping ring 61 and the lower clamping ring 62. Because the positioning block 652 in the self-locking box 651 meshes with the self-locking ratchet wheel 653, the upper clamping ring 61 cannot slide upward, preventing the powder bag from detaching. After the feeding is completed, after pressing the unlocking button 6542, the wedge block 6541 moves along the direction of the bag clamping handle 63, and through the abutment of the inclined surface with the inclined surface of the wedge block groove 6521, the positioning block 652 is pushed, so that the positioning block 652 is separated from the self-locking ratchet wheel 653. Pull the bag clamping handle 63, and slide the upper clamping ring 61 upward, so as to unload and replace the powder bag.

[0046] In the specific implementation of the embodiment of the present invention: When feeding according to the requirements and descriptions above, clamp and fix the bag mouth of the powder bag with the bag mouth opened between the upper clamping ring 61 and the lower clamping ring 62. Start the feeding motor 548, and through the automatic feeding module 54, make the feeding wheel 51 rotate and reciprocate within the range of 120° to 150°, so that the material supporting plate 513 lifts the bagged powder and jolts it back and forth, so that the powder in the bag quickly flows out, enters the outer cylinder 1 through the feeding channel 512, and is poured into the material collecting hopper 41. It is evenly dispersed into the four storage bins of the storage hopper 43 through the material distributing cone 42, and through the weighing sensor 44, the weight A of the existing powder in the storage hopper 43 is obtained.

[0047] When feeding, each feeding valve 432 of the storage hopper 43 is opened, and the feeding speed of the feeding valve 432 is controlled by the number of opened feeding valves 432 until the weight of the remaining powder in the storage hopper 43 reaches the set value B. The powder leaving the storage hopper 43 falls on the non - central part of the sieve 211 and is screened by the rotating sieve 211, so that the internal lumps remain in the sieve 211 and are broken by the reversely rotating crushing rod 221. As the sieve 211 rotates, under the action of the vibration dust removal module 23, the sieve 211 moves downward intermittently and jacks up upward, generating impacts and vibrations, throwing up the lumps in the sieve 211 and shaking off the attached residual powder. The broken lumps pass through the sieve 211, fall into the lower discharge hopper 14 together with other powders, and are discharged through the discharge valve 15 and then sent into the concrete mixing station.

[0048] In the specific implementation of the present invention, the content not described in detail in this specification belongs to the prior art well - known to those skilled in the art.

[0049] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural manners and embodiments without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A powder feeding device for a concrete mixing plant, characterized in that, Comprising: An outer cylinder (1) with a discharge hopper (14) provided at the bottom, a top cover (12) provided at the top, and a feeding structure (5) provided on the top cover (12). A bag mouth connection structure (6) is provided at the inlet of the feeding structure (5). A crushing and screening structure (2) is provided inside the outer cylinder (1). The crushing and screening structure (2) includes a screening module (21), a crushing module (22), and a vibration dust removal module (23). The screening module (21) and the crushing module (22) are driven by a driving module (3) provided on the outer cylinder (1). The vibration dust removal module (23) includes a ratchet rod (231) and a support rod (233) fixed on the outer cylinder (1). The bottom of the ratchet rod (231) is provided with ratchet teeth. The screening module (21) is provided with a screen (211). One end of the rotating shaft of the screen (211) is movably sleeved on the ratchet rod (231), and a transmission ratchet (232) meshing with the ratchet teeth of the ratchet rod (231) is provided. The other end is movably sleeved on the support rod (233), and a support plate (234) is provided. A support spring (235) is provided between the support plate (234) and the support rod (233). When the screen (211) rotates and moves downward through the transmission ratchet (232), it is bounced back by the support spring (235).

2. The powder feeding device for a concrete mixing plant according to claim 1, characterized in that: A screening sleeve (212) is provided outside the screen (211). The crushing module (22) includes a crushing rod (221) arranged inside the screening sleeve (212) and a crushing sleeve (223) rotatably arranged on the screening sleeve (212). The rotating shaft of the crushing rod (221) is rotatably arranged on the rotating shaft of the screen (211) and is connected to the crushing sleeve (223) through a connecting rod.

3. The powder feeding device for a concrete mixing plant according to claim 2, characterized in that: The driving module (3) includes an upper gear ring (36) and a lower gear ring (37) rotatably arranged on the outer cylinder (1). An equipment box (13) is provided on the side wall of the outer cylinder (1), and a driving motor (31) is provided inside the equipment box (13). The driving shaft of the driving motor (31) is connected to both the upper gear ring (36) and the lower gear ring (37) through gear drive connections and drives the upper gear ring (36) and the lower gear ring (37) to rotate in opposite directions. The screening sleeve (212) is slidably sleeved up and down inside the lower transmission gear (35), and the crushing sleeve (223) is slidably sleeved up and down inside the upper gear ring (36).

4. A powder feeding device for a concrete mixing plant according to claim 1, characterized in that: The feeding structure (5) includes a mounting frame (52) fixed on the top cover (12) and a feeding wheel (51) rotatably arranged on the mounting frame (52). A feeding channel (512) is provided on the feeding wheel (51). The outlet of the feeding channel (512) is blocked by the mounting frame (52), and a feeding trough opening (511) is provided at the inlet. A supporting plate (513) and a bag mouth connection structure (6) are provided at the feeding trough opening (511). After the feeding wheel (51) rotates, the outlet of the feeding channel (512) is separated from the mounting frame (52) and is arranged downward.

5. A powder feeding device for a concrete mixing plant according to claim 4, characterized in that: A chassis (53) is provided on the mounting bracket (52). The chassis (53) is arranged on one side of the feeding wheel (51), and a transmission rack (543) is slidably arranged inside. The transmission rack (543) is arranged vertically and meshes with a runner gear (541) provided on the rotating shaft of the feeding wheel (51). A feeding motor (548) is arranged inside the chassis (53), and a feeding gear (542) that meshes with the transmission rack (543) is provided on the driving shaft of the feeding motor (548).

6. The powder feeding device for a concrete mixing plant according to claim 5, characterized in that: The feeding gear (542) is a semi-gear. Ratchet teeth are provided on the other side of the transmission rack (543), and a return spring (544) is provided between the bottom and the chassis (53). A check ratchet block (545) is slidably arranged inside the chassis (53), and a check spring (546) is provided between one side of the check ratchet block (545) and the chassis (53). The other side meshes with the ratchet teeth of the transmission rack (543).

7. A powder feeding device for a concrete mixing plant according to claim 6, characterized in that: A pressing rod (547) is slidably arranged on the chassis (53). One end of the pressing rod (547) is connected to the check ratchet block (545), and the other end is arranged outside the chassis (53) and is provided with a grip.

8. A powder feeding device for a concrete mixing plant according to claim 4, characterized in that: The bag mouth connection structure (6) includes a lower clamping ring (62) fixed inside the feeding trough opening (511) and an upper clamping ring (61) slidably arranged inside the feeding trough opening (511). The upper clamping ring (61) is movably sleeved at the inlet of the feeding channel (512). A self-locking module (65) is rotatably arranged on the side wall of the feeding trough opening (511). A bag clamping handle (63) is fixed on the self-locking module (65), and a connecting rod (64) is hinged on the bag clamping handle (63). The other end of the connecting rod (64) is hinged to the upper clamping ring (61).

9. The powder feeding device for a concrete mixing plant according to claim 8, wherein: The self-locking module (65) includes a self-locking box (651) rotatably arranged on the feeding wheel (51) and an unlocking rod (654) slidably arranged inside the bag clamping handle (63). A positioning block (652) is arranged inside the self-locking box (651), and a self-locking ratchet wheel (653) is arranged inside the rotating shaft of the self-locking box (651). A wedge block groove (6521) is provided on the positioning block (652). A self-locking spring (656) is provided between one side and the self-locking box (651). The other side is movably sleeved inside the rotating shaft of the self-locking box (651) and meshes with the self-locking ratchet wheel (653). An unlocking spring (655) is provided between one end of the unlocking rod (654) and the bag clamping handle (63). The other end is provided with a wedge block (6541), and the inclined surface of the wedge block (6541) abuts against the inclined surface of the wedge block groove (6521).

Images