A powder feeding device for a concrete mixing plant

Abstract

The present application relates to the technical fields of powder feeding, and discloses a powder feeding device for a concrete mixing station, which comprises an outer cylinder, a discharge hopper arranged at the bottom of the outer cylinder, a top cover arranged at the top of the outer cylinder, a feeding structure arranged on the top cover, a bag opening connecting structure arranged at the inlet of the feeding structure, a crushing and screening structure slidably arranged in the outer cylinder, and a vibrating and dedusting module, wherein the vibrating and dedusting module comprises a ratchet rod and a supporting rod fixed to the outer cylinder, the ratchet rod is provided with a ratchet at the bottom, the screening module is provided with a screen, the rotating shaft of the screen is movably sleeved on the ratchet rod at one end, the ratchet rod is provided with a transmission ratchet engaged with the ratchet rod, the rotating shaft of the screen is movably sleeved on the supporting rod at the other end, and the supporting rod is 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 present application has the advantage that the vibrating and dedusting module is used to generate vibration to shake off the residual powder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder feeding, in particular to a powder feeding device for a concrete mixing station. BACKGROUND

[0002] The main function of a concrete mixing station is to centrally mix concrete, and cement and other powder materials are generally transported into the concrete mixing station by a powder feeding device, so as to participate in the mixing and blending of concrete. The powder feeding device can quickly and accurately complete the transportation and metering of materials, control the proportion of each powder and ingredient in the concrete, and improve and control the performance of the concrete product. However, the existing powder feeding devices on the market generally only have the function of transferring powder, and the cement material may be partially caked during temporary storage due to moisture and other reasons. When these cement cakes enter the concrete mixing station along with the powder, they may have some impact on the concrete mixing effect. When the cement powder is screened by the powder feeding device, a large amount of powder may be left on the screen, resulting in an error in the content of the powder entering the concrete mixing station, which may affect the mixing effect and product quality of the concrete. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a powder feeding device for a concrete mixing station, which can screen and crush the powder entering the concrete mixing station to prevent caking from entering the concrete mixing station, and can also remove dust from the screen by mechanical vibration to reduce the residual powder and reduce the weighing error of the powder.

[0004] To solve the above technical problems, the technical solution provided by the present application is as follows:

[0005] A powder feeding device for a concrete mixing station, comprising:

[0006] An outer cylinder is provided with a discharge hopper at the bottom and a top cover at the top, and the top cover is provided with a feeding structure, the inlet of the feeding structure is provided with a bag opening connecting structure, and the outer cylinder is provided with a crushing and screening structure, the crushing and screening structure comprises a screening module, a crushing module and a vibration dust removal module, and the screening module and the crushing module are driven by a driving module arranged on the outer cylinder;

[0007] The vibration dust removal module comprises a ratchet rod and a support rod fixed on the outer cylinder, the bottom of the ratchet rod is provided with a ratchet, 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 the other end is movably sleeved on the support rod and provided with a support plate, a support spring is arranged between the support plate and the support rod, the screen rotates, and after moving downward through the transmission ratchet, it is bounced back by the support spring.

[0008] Further, the screen outside is provided with a screening sleeve, the crushing module comprises a crushing rod arranged in the screening sleeve and a crushing sleeve rotatably arranged on the screening sleeve, and the rotating shaft of the crushing rod is rotatably arranged on the rotating shaft of the screen and connected with the crushing sleeve through a connecting rod.

[0009] Further, the driving module comprises an upper gear ring and a lower gear ring rotatably arranged on the outer cylinder, the outer cylinder is provided with an equipment box on the side wall, and the equipment box is fixedly provided with a U-shaped frame, the U-shaped frame is rotatably provided with an upper driving gear engaged with the upper gear ring and a lower driving gear engaged with the lower gear ring, the U-shaped frame is provided with a driving motor, a driving bevel gear is connected to the driving shaft of the driving motor, and the driving bevel gear is engaged with the bevel gears formed on the opposite surfaces of the upper driving gear and the lower driving gear, and after the driving motor is started, the upper gear ring and the lower gear ring rotate in opposite directions, the screening sleeve is slidably arranged in the lower driving gear, and the crushing sleeve is slidably arranged in the upper gear ring.

[0010] Further, the feeding structure comprises a mounting frame fixed to the top cover and a feeding wheel rotatably arranged on the mounting frame, the feeding wheel is provided with a feeding channel, and the outlet of the feeding channel is blocked by the mounting frame to prevent the powder dust in the outer cylinder from spreading to the outside, and the inlet is provided with a feeding slot, the feeding slot is provided with a material supporting plate and a bag opening connecting structure, and after the feeding wheel rotates, the outlet of the feeding channel is separated from the mounting frame and is arranged downward, so that the powder enters the outer cylinder through the feeding channel.

[0011] Further, the mounting frame is provided with a machine box, the machine box is arranged on one side of the feeding wheel, and a transmission rack is slidably arranged in the machine box, the transmission rack is vertically arranged and engaged with a rotating gear arranged on the rotating shaft of the feeding wheel, the machine box is provided with a feeding motor, and a feeding gear engaged with the transmission rack is arranged on the driving shaft of the feeding motor.

[0012] Further, the feeding gear is an incomplete gear, a ratchet is arranged on the other side of the transmission rack at a distance, the distance of the ratchet is shorter than that of the transmission rack, a return spring is arranged between the bottom of the transmission rack and the machine box, a check ratchet block is slidably arranged in the machine box, a check spring is arranged between one side of the check ratchet block and the machine box, the other side of the check ratchet block is engaged with the ratchet of the transmission rack, a pressing rod is slidably arranged on the machine box, one end of the pressing rod is connected with the check ratchet block, the other end of the pressing rod is arranged outside the machine box and provided with a handle, and after the handle is pushed, the check ratchet block is pressed and separated from the transmission rack, the transmission rack is returned to the original position by the return spring, and the feeding wheel is rotated back.

[0013] Further, the bag opening connecting structure comprises a lower clamping ring fixed in the feeding slot opening and an upper clamping ring slidingly arranged in the feeding slot opening, the upper clamping ring is movably sleeved with the feeding channel inlet, a self-locking module is rotationally arranged on the side wall of the feeding slot opening, a bag clamping handle is fixed on the self-locking module, and a connecting rod is hingedly connected to the bag clamping handle, and the other end of the connecting rod is hingedly connected with the upper clamping ring.

[0014] Further, the self-locking module comprises a self-locking box rotationally arranged on the feeding wheel and an unlocking rod slidingly arranged in the bag clamping handle, the self-locking box is provided with a positioning block, the self-locking box rotation shaft is provided with a self-locking ratchet, the positioning block is provided with a wedge groove, a self-locking spring is arranged between one side of the positioning block and the self-locking box, and the other side is movably sleeved in the self-locking box rotation shaft and engaged with the self-locking ratchet, the unlocking rod is provided with a wedge on the other end, the wedge slope of the unlocking rod is in abutment with the wedge groove slope, and after pressing the unlocking rod, the wedge slope and the wedge groove slope slide, the positioning block compresses the self-locking spring, and the positioning block is separated from the self-locking ratchet.

[0015] Further, the crushing module comprises a crushing rod, and the rotation shaft of the crushing rod is rotationally arranged on the screen mesh rotation shaft, one side of the crushing rod is provided with a scraper, and the scraper is an elastic structure body and is in abutment with the screen mesh on one side.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The present application is provided with a screening module and a crushing module, and the screening effect on the powder and the crushing capacity on the caked powder are improved through the reverse rotation between the two, the powder entering the concrete mixing station is more uniform, and the stirring and mixing effect is better.

[0018] 2. The present application is provided with a vibration dust removal module, and the screening module and the crushing module automatically reciprocate and impact in the up-down direction during the rotation process through the vibration dust removal module, so as to generate vibration, shake off the residual powder in the screening process, reduce the powder feeding error, and improve the accuracy of the feeding ratio.

[0019] 3. The present application is provided with a feeding structure, and the bagged powder can be shaken up and down during the feeding process through the feeding structure, the powder is more convenient to enter, the residual amount of the powder in the bag is less, and the use is more convenient.

[0020] 4. The present application is provided with a bag opening connecting structure, which can be quickly connected with the bag opening of the packaging bag containing the powder, and cooperates with the feeding structure to realize dust-free feeding of the powder, avoids dust and diffusion pollution during the feeding process, and is more environmentally friendly, safe and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1It is the structural schematic diagram of the present application.

[0022] Figure 2 It is the sectional view schematic diagram of the present application.

[0023] Figure 3 It is the structural schematic diagram of the crushing and screening structure and driving module of the present application.

[0024] Figure 4 It is the structural development schematic diagram of the crushing and screening structure of the present application.

[0025] Figure 5 It is the structural schematic diagram of the screening module and crushing module of the present application.

[0026] Figure 6 It is the structural schematic diagram of the top cover of the present application.

[0027] Figure 7 It is the sectional view schematic diagram of the top cover of the present application.

[0028] Figure 8 It is the structural development schematic diagram of the feeding structure of the present application.

[0029] Figure 9 It is the sectional view schematic diagram of the feeding structure of the present application. Figure 1 .

[0030] Figure 10 It is the structural schematic diagram of the feeding structure of the present application. Figure 2 .

[0031] Figure 11 It is the structural schematic diagram of the bag opening connecting structure of the present application.

[0032] Figure 12 It is the structural development schematic diagram of the self-locking module of the present application.

[0033] Figure 13 It is the sectional view schematic diagram of the self-locking module of the present application.

[0034] Figure 14 It is the structural schematic diagram of the quantitative feeding module of the present application. Figure 1 .

[0035] Figure 15 It is the structural schematic diagram of the quantitative feeding module of the present application. Figure 2 .

[0036] As shown: 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, 212, screening sleeve, 22, crushing module, 221, crushing rod, 222, scraper, 223, crushing sleeve, 23, vibration dust removal module, 231, ratchet rod, 232, transmission ratchet, 233, support rod, 234, support plate, 235, support spring, 236, upper connecting beam, 237, lower connecting beam, 3, drive module, 31, drive motor, 32, U-shaped frame, 33, drive 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, material distributing cone, 43, material storage hopper, 431, hopper sleeve, 432, feeding valve, 44, weighing sensor, 5, feeding structure, 51, feeding wheel, 52, mounting frame, 53, machine box, 54, automatic feeding module, 541, rotating wheel gear, 542, feeding gear, 543, transmission rack, 544, return spring, 545, non-return ratchet block, 546, non-return spring, 547, pressing rod, 548, feeding motor, 6, bag opening connecting 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 groove, 653, self-locking ratchet, 654, unlocking rod, 6541, wedge, 6542, unlocking button, 655, unlocking spring, 656, self-locking spring. DETAILED DESCRIPTION

[0037] The application will be further described in detail below with reference to the drawings.

[0038] The drawings show Figure 1 The drawings show Figure 2As shown, a powder feeding device for a concrete mixing station is arranged on the top of the concrete mixing station for use, which comprises an outer cylinder 1 arranged on the top of the concrete mixing station, a discharge hopper 14 arranged at the bottom of the outer cylinder 1, a discharge valve 15 arranged at the outlet of the discharge hopper 14, a top cover 12 arranged at the top of the outer cylinder 1, a ring of workbenches 11 arranged on the outer side of the top cover 12 in a circumferential direction, guardrails arranged on the outer side of the workbenches 11, a feeding structure 5 arranged on the top cover 12, a bag opening connecting structure 6 arranged at the inlet of the feeding structure 5, and a bag opening connecting structure 6 arranged at the inlet of the feeding structure 5. The bagged powder is transferred from the packaging bag to the outer cylinder 1 in a dust-free manner through the feeding structure 5 and the bag opening connecting structure 6. A crushing and screening structure 2 is further arranged in the outer cylinder 1, which comprises 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 drivingly connected with the driving module 3, and are reversely rotated after being driven by the driving module 3. Specifically:

[0039] In combination with the accompanying drawings Figure 2 , the accompanying drawings Figure 3 As shown, the driving module 3 comprises an upper gear ring 36 and a lower gear ring 37 (the upper gear ring 36 and the lower gear ring 37 are arranged horizontally, and are connected with the side wall of the outer cylinder 1 through bearings on the upper and lower sides), and the inner sides of the upper gear ring 36 and the lower gear ring 37 are provided with spline grooves. The equipment box 13 is fixed with a U-shaped frame 32, the U-shaped frame 32 is rotatably provided with an upper driving gear 34 engaged with the upper gear ring 36 and a lower driving gear 35 engaged with the lower gear ring 37 on the inner side, a driving motor 31 is arranged on the U-shaped frame 32, a driving bevel gear 33 is connected on the driving shaft of the driving motor 31, and the driving bevel gear 33 is engaged with the bevel gears formed on the opposite surfaces of the upper driving gear 34 and the lower driving gear 35 at the same time. After the driving motor 31 is started, the upper gear ring 36 and the lower gear ring 37 are reversely rotated in the outer cylinder 1 through gear transmission.

[0040] In combination with the accompanying drawings Figure 2 , the accompanying drawings Figure 3 , the accompanying drawings Figure 4 , the accompanying drawings Figure 5As shown, the screening module 21 includes a horizontally arranged screen 211, a rotating shaft is arranged in the middle of the screen 211, a screening sleeve 212 is arranged outside, the outside of the screening sleeve 212 is provided with splines, and the screening sleeve 212 is slidably sleeved 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 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 the top of the rotating shaft is connected to the crushing sleeve 223 through a connecting rod. The crushing rod 221 is provided with a scraper 222 on one side. The scraper 222 is a resilient structure and abuts against the screen 211 on one side. The crushing sleeve 223 is provided with splines on the outside and is slidably sleeved in the upper gear ring 36.

[0041] In the above, after the driving motor 31 is started, the upper transmission gear 34 and the lower transmission gear 35 rotate in opposite directions under the action of the driving bevel gear 33, 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 with the lower gear ring 37, and the powder falling down is screened and impacted. The crushing rod 221 rotates with the upper gear ring 36, and the powder clumps left in the screen 211 are impacted and crushed, and the screen 211 is scraped by the scraper 222 to reduce the residual powder. During 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 is worth noting that the rotation speed between the screening module 21 and the crushing module 22 can be changed by adjusting the size of each gear, so that they rotate at different speeds (in the figure, they rotate at the same speed in opposite directions).

[0042] In combination with the accompanying drawings Figure 2 , the accompanying drawings Figure 3 , the accompanying drawings Figure 4 As shown, the vibration dust removal module 23 includes a ratchet rod 231 fixed to the outer cylinder 1 by an upper connecting beam 236 and a support rod 233 fixed to the outer cylinder 1 by a lower connecting beam 237. A ratchet tooth is arranged on the bottom of the ratchet rod 231 (the ratchet tooth is arranged circumferentially on the ratchet rod 231 and connected end to end, and 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 the outer wall is provided with a transmission ratchet 232 engaged with the ratchet tooth of the ratchet rod 231. The other end is movably sleeved on the support rod 233, and the outer wall is provided with a circle of support plates 234. The support plates 234 and the support rod 233 are provided with a support spring 235 therebetween.

[0043] In the above, the screen 211 is driven to rotate by the driving module 3, and during the rotation, the inclined surface of the ratchet teeth of the ratchet rod 231 abuts and slides with the inclined surface of the transmission ratchet 232, so that the screen 211 gradually moves downward and compresses the supporting spring 235. After the vertical surface of the ratchet teeth of the ratchet rod 231 aligns with the vertical surface of the transmission ratchet 232, the supporting spring 235 quickly restores the elongation to quickly lift the screen 211, and the transmission ratchet 232 collides with the ratchet rod 231, so that the screen 211 vibrates to shake off the attached residual powder. At the same time, the powder clumps left in the screen 211 are thrown upward to enhance the impact between the clumps and the screen 211 and the crushing rod 221, thereby strengthening the crushing effect. During this process, the crushing module 22 moves up and down with the screening module 21 and vibrates, and the residual powder on the crushing module 22, the upper connecting beam 236 and the lower connecting beam 237 is shaken off, thereby reducing the residual amount of powder feeding, reducing the powder feeding error, and making the powder feeding amount and the concrete proportioning more accurate.

[0044] In combination with the accompanying drawings Figure 2 , the accompanying drawings Figure 14 , the accompanying drawings Figure 15 As shown, the quantitative feeding module 4 includes a material collecting hopper 41 fixed in the outer cylinder 1, a material distributing cone 42 fixed at the top of the ratchet rod 231, and a material storage hopper 43 movably sleeved in the outer cylinder 1. The material distributing cone 42 is arranged directly below the outlet of the material collecting hopper 41, the material storage hopper 43 is provided with a hopper sleeve 431 in the middle, the hopper sleeve 431 is slidably arranged on the hopper sleeve 431, and the hopper sleeve 431 is arranged on the weighing sensor 44. The material storage hopper 43 is uniformly provided with four funnel-shaped material storage bins in the circumferential direction, and the bottoms of the material storage bins are respectively provided with feeding valves 432.

[0045] In the above, after the powder enters the outer cylinder 1, it is collected by the material collecting hopper 41 to the top of the material distributing cone 42, and is uniformly dispersed into the four material storage bins of the material storage hopper 43 through the material distributing cone 42. The weight A of the existing powder in the material storage hopper 43 can be obtained through the weighing sensor 44, and after the feeding valve 432 is opened, the powder in the material storage bin falls on the non-central part of the screen 211, facilitating the crushing of part of the clumps by the crushing rod 221. The opening amount of the feeding valve 432 can control the feeding speed, and after the feeding is completed, the weight B of the remaining powder in the material storage hopper 43 can be obtained through the weighing sensor 44, and the powder feeding amount is C=A-B.

[0046] In combination with the accompanying drawings Figure 6 , the accompanying drawings Figure 7As shown, 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. The mounting frame 52 on one side of the feeding wheel 51 is provided with a machine box 53, and the machine box 53 is connected with the rotating shaft of the feeding wheel 51 through an automatic feeding module 54. The feeding wheel 51 is internally provided with a feeding channel 512 (the feeding channel 512 is a tubular slot structure gradually widened from the inlet to the outlet), and the outlet of the feeding channel 512 is blocked by the mounting frame 52, and the inlet is provided with a feeding slot 511. The feeding slot 511 is provided with a material supporting plate 513 and a bag opening connecting structure 6.

[0047] As shown above, after the feeding wheel 51 is rotated by 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 with the bag opening connecting structure 6 is lifted by the material supporting plate 513, and is 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 is reversely rotated and falls down, the outlet of the feeding channel 512 is again blocked by the mounting frame 52, so as to prevent the powder dust in the outer cylinder 1 from being lifted and leaking reversely through the feeding channel 512, causing the outside dust diffusion and pollution, and affecting the health and safety of the operator and the environment.

[0048] In combination with the accompanying drawings Figure 8 , the accompanying drawings Figure 9 , the accompanying drawings Figure 10 As shown, the automatic feeding module 54 includes a transmission rack 543 slidably arranged in the machine box 53, and a feeding motor 548 fixed in the machine box 53. The transmission rack 543 is vertically arranged, and is provided with a ratchet section on one side (a section at the top of the transmission rack 543 is not provided with a ratchet section). The other side is engaged with a rotating wheel gear 541 arranged on the rotating shaft of the feeding wheel 51. The bottom is provided with a return spring 544 between the transmission rack 543 and the machine box 53. The driving shaft of the feeding motor 548 is provided with a feeding gear 542 engaged with the transmission rack 543. The feeding gear 542 is an incomplete gear, and the number of teeth is one twelfth of the number of teeth of the rotating wheel gear 541, that is, the feeding gear 542 rotates one circle, and the rotating wheel gear 541 rotates 30°. The machine box 53 is slidably provided with a check ratchet block 545 and a pressing rod 547. The check ratchet block 545 is provided with a check spring 546 between one side and the machine box 53. The other side is engaged with the ratchet of the transmission rack 543. After engagement, the transmission rack 543 cannot slide upward. One end of the pressing rod 547 is connected with the check ratchet block 545, and the other end is arranged outside the machine box 53, and is provided with a handle.

[0049] As described above, after the feeding motor 548 starts, the feeding gear 542 rotates and intermittently meshes with the transmission rack 543, intermittently driving the transmission rack 543 to move downwards. During the downward movement, the rotating gear 541 drives the feeding wheel 51 to rotate intermittently (the feeding wheel 51 rotates 30° each time), compressing the return spring 544 and simultaneously meshing with the check ratchet block 545, preventing it from sliding upwards. This causes the feeding wheel 51 to drive the material support plate 513 to lift the bagged powder for feeding, and the feeding wheel 51 rotates 120°. Afterwards, the check ratchet block 545 disengages from the ratchet section of the transmission rack 543, and the transmission rack 543 continues to mesh with the rotating feeding gear 542. After moving down a certain distance, it disengages from the feeding gear 542 and is pushed back by the compressed return spring 544 and impacts the check ratchet block 545. This causes the feeding wheel 51 to rotate back and forth within the range of 120° to 150°, and to bounce the bagged powder on the material support plate 513 back and forth, promoting the outflow of powder from the bag and reducing powder residue in the bag and the feeding channel 512.

[0050] After repeated shaking and the powder in the bag is completely poured out, the feeding motor 548 is stopped, and the pressing rod 547 is pushed, causing the check ratchet block 545 to compress the check spring 546 and disengage from the transmission rack 543. The transmission rack 543 is pushed back by the compressed reset spring 544, and the feeding wheel 51 is driven to rotate back to its original position.

[0051] Combined with appendix Figure 11 As shown, the bag opening connection structure 6 includes a lower clamping ring 62 fixed in the feeding slot 511 and an upper clamping ring 61 slidably disposed in the feeding slot 511. The upper clamping ring 61 is movably sleeved with 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 disposed on the side wall of the feeding slot 511. A bag clamping handle 63 is fixed on the self-locking module 65, and a connecting rod 64 is hinged to the bag clamping handle 63. The other end of the connecting rod 64 is hinged to the upper clamping ring 61.

[0052] Combined with appendix Figure 12 Appendix Figure 13As shown, the self-locking module 65 comprises a self-locking box 651 rotatably arranged on the feeding wheel 51, and an unlocking lever 654 slidably arranged in the bag clamping handle 63. The self-locking box 651 is provided with a positioning block 652, and the rotation shaft of the self-locking box 651 is provided with a self-locking ratchet 653. The positioning block 652 is provided with a wedge groove 6521, and the self-locking box 651 is provided with a self-locking spring 656 on one side and a ratchet on the other side. The ratchet is movably sleeved in the rotation shaft of the self-locking box 651 and is engaged with the self-locking ratchet 653. The unlocking lever 654 is provided with an unlocking button 6542 at one end, and the unlocking button 6542 and the bag clamping handle 63 are provided with an unlocking spring 655. The other end of the unlocking lever 654 is provided with a triangular wedge 6541 arranged in the wedge groove 6521 and abutting against the inclined surface of the wedge groove 6521 (the size of the wedge groove 6521 is larger than that of the wedge 6541). After the unlocking button 6542 is pressed, the wedge 6541 pushes the positioning block 652, and the positioning block 652 is disengaged from the self-locking ratchet 653.

[0053] After the bag opening of the powder bag is opened, the bag opening is passed through the lower clamping ring 62 and sleeved on the upper clamping ring 61, the bag clamping handle 63 is pulled, and the upper clamping ring 61 is driven by the connecting rod 64 to move downward and clamp and fix the bag opening between the upper clamping ring 61 and the lower clamping ring 62. Because the positioning block 652 in the self-locking box 651 is engaged with the self-locking ratchet 653, the upper clamping ring 61 cannot slide upward, preventing the powder bag from being separated. After the feeding is completed, the unlocking button 6542 is pressed, the wedge 6541 moves in the direction of the bag clamping handle 63, and the positioning block 652 is pushed by the abutment of the inclined surface and the inclined surface of the wedge groove 6521, so that the positioning block 652 is disengaged from the self-locking ratchet 653. The bag clamping handle 63 is pulled to slide the upper clamping ring 61 upward, so as to unload and replace the powder bag.

[0054] In the specific implementation of the embodiment of the application:

[0055] When the powder bag with the bag opening opened is clamped and fixed between the upper clamping ring 61 and the lower clamping ring 62 during feeding according to the above requirements and descriptions, the feeding motor 548 is started, the feeding wheel 51 is rotated and reciprocated within a range of 120° to 150° through the automatic feeding module 54, so that the powder bag is lifted by the material supporting plate 513 and is shaken back and forth, so that the powder in the bag flows out quickly, enters the outer cylinder 1 through the feeding channel 512, and is poured into the material collecting hopper 41. The powder is uniformly dispersed into the four storage hoppers of the storage hopper 43 through the material distributing cone 42, and the weight A of the existing powder in the storage hopper 43 is obtained through the weighing sensor 44.

[0056] When feeding, open each feeding valve 432 of the storage hopper 43, and open the number control feeding valve 432 to control the feeding speed of the feeding valve 432, until the weight of the remaining powder in the storage hopper 43 reaches the set B. The powder falling out of the storage hopper 43 falls on the non-center of the screen 211, and is screened by the rotating screen 211, so that the internal agglomerates are left in the screen 211 and are broken by the counter-rotating crushing rod 221. With the rotation of the screen 211, the screen 211 intermittently moves downward under the action of the vibrating dust removal module 23, and is lifted upward, generating impact and vibration, throwing the agglomerates in the screen 211, and shaking off the attached residual powder. The broken agglomerates pass through the screen 211 and fall into the lower discharge hopper 14 together with other powders, and are discharged through the discharge valve 15, and then are sent to the concrete mixing station.

[0057] In the implementation of the present application, the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0058] The above describes the present application and its embodiments, which are not limited, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the present application.

Claims

1. A powder feeding device for a concrete mixing plant, characterized in that, include: The outer cylinder (1) has a discharge hopper (14) at the bottom and a top cover (12) at the top. The top cover (12) has a feeding structure (5). The inlet of the feeding structure (5) has a bag mouth connection structure (6). The outer cylinder (1) has a crushing and screening structure (2). 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 the 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 is provided with a transmission ratchet (232) that meshes with the ratchet teeth of the ratchet rod (231). The other end is movably sleeved on the support rod (233) and is provided with a support plate (234). 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). The transmission ratchet (232) collides with the ratchet rod (231), thereby causing the screen (211) to vibrate.

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

3. A powder feeding device for a concrete mixing plant according to claim 2, characterized in that: The drive module (3) includes an upper gear ring (36) and a lower gear ring (37) rotatably mounted on the outer cylinder (1). An equipment box (13) is provided on the side wall of the outer cylinder (1), and a drive motor (31) is provided inside the equipment box (13). The drive shaft of the drive motor (31) is connected to the upper gear ring (36) and the lower gear ring (37) through gear drive, and drives the upper gear ring (36) and the lower gear ring (37) to rotate in opposite directions. The screening sleeve (212) is slidably mounted on the lower transmission gear (35), and the crushing sleeve (223) is slidably mounted on 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 mounted on the mounting frame (52). The feeding wheel (51) is provided with a feeding channel (512), and the outlet of the feeding channel (512) is blocked by the mounting frame (52). The inlet is provided with a feeding slot (511), and the feeding slot (511) is provided with a material support plate (513) and a bag opening connection structure (6). After the feeding wheel (51) rotates, the outlet of the feeding channel (512) separates from the mounting frame (52) and is arranged downwards.

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

6. A powder feeding device for a concrete mixing plant according to claim 5, characterized in that: The feeding gear (542) is a half gear, and the transmission rack (543) is provided with ratchet teeth on the other side. A return spring (544) is provided between the bottom and the housing (53). A check ratchet block (545) is slidably provided inside the housing (53). A check spring (546) is provided between one side of the check ratchet block (545) and the housing (53), and 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 provided on the chassis (53). One end of the pressing rod (547) is connected to the anti-return ratchet block (545), and the other end is arranged outside the chassis (53) and is provided with a handle.

8. A powder feeding device for a concrete mixing plant according to claim 4, characterized in that: The bag opening connection structure (6) includes a lower clamping ring (62) fixed in the feeding slot (511) and an upper clamping ring (61) slidably disposed in the feeding slot (511). The upper clamping ring (61) is movably sleeved with the inlet of the feeding channel (512). A self-locking module (65) is rotatably disposed on the side wall of the feeding slot (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. A powder feeding device for a concrete mixing plant according to claim 8, characterized in that: The self-locking module (65) includes a self-locking box (651) rotatably mounted on the feeding wheel (51) and an unlocking rod (654) slidably mounted in the bag clamping handle (63). The self-locking box (651) is provided with a positioning block (652) and a self-locking ratchet (653) is provided in the rotating shaft of the self-locking box (651). The positioning block (652) is provided with a wedge groove (6521). A self-locking spring (656) is provided between one side and the self-locking box (651), and the other side is movably sleeved in the rotating shaft of the self-locking box (651) and meshes with the self-locking ratchet (653). One end of the unlocking rod (654) is provided with an unlocking spring (655) between one end and the bag clamping handle (63), and the other end is provided with a wedge (6541). The inclined surface of the wedge (6541) abuts against the inclined surface of the wedge groove (6521).

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