Feeding and conveying device capable of preventing bridging

Abstract

The invention relates to a feeding and conveying device capable of preventing bridging, and belongs to the technical field of chemical engineering, the feeding and conveying device comprises a stock bin, a surge bin and a spiral conveyor, the top of the stock bin is provided with a feeding port, the stock bin is provided with a knocking arch breaking assembly and an airflow arch breaking assembly, and the airflow arch breaking assembly is communicated with an external nitrogen source; the surge bin is located below the stock bin and communicates with the stock bin, and a rake tooth arch breaking assembly is arranged on the inner side of the surge bin. By means of the material bin, the technical problem that in the prior art, due to material clustering and bridging, a material bin cannot discharge materials, and the material conveying efficiency is affected can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a feeding and conveying device capable of preventing bridging. Background Art

[0002] Polyvinyl chloride paste resin is a branch of polyvinyl chloride resin, and is named for its highly dispersible powder used in paste processing. The production process of polyvinyl chloride paste resin is complex, and many types of additives are used in the production process, and the additive components are complex. Micro-suspension paste resin is mainly obtained by micro-suspension polymerization of initiator, emulsifier and vinyl chloride monomer under certain conditions. Among them, emulsifier is one of the main raw materials for paste resin production, which mainly reduces the interfacial tension between vinyl chloride monomer and water, adsorbs on the surface of vinyl chloride monomer oil droplets, and during the polymerization process, makes the latex particles stably suspended in water without aggregation or connection. Emulsifier is actually a type of surfactant or a combination of them, which is often a solid powder material, which is usually transported to the subsequent processing device by a conveying mechanism after passing through the silo. The continuously flowing emulsifier constantly enters the silo, and the friction between the emulsifier particles and between the particles and the inner wall of the silo increases, which reduces the fluidity of the emulsifier. At the same time, if the emulsifier absorbs water in this process, the emulsifier will stick to the inner wall of the silo, or even form a bridging phenomenon, making it impossible to discharge the silo, affecting the efficiency of the transportation operation. Summary of the invention

[0003] In view of the various deficiencies in the prior art, a feeding and conveying device that prevents bridging is proposed to solve the technical problem in the prior art that the silo cannot be discharged due to material agglomeration and bridging, thereby affecting the material conveying efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions: A feeding and conveying device for preventing bridging, comprising: A silo, the top of which is provided with a feeding port, the silo is provided with a knocking arch breaking component and an airflow arch breaking component, and the airflow arch breaking component is connected to an external nitrogen source; A buffer bin, which is located below the silo and communicated with the silo, and has a rake tooth arch breaking assembly disposed inside the buffer bin; And a screw conveyor, whose feed port is communicated with the buffer bin, and inside which a screw conveyor rod and a screw blade are arranged.

[0005] The technical solution is further configured as follows: the silo includes a straight tube section and a tapered section from top to bottom, and the knocking arch breaking component and the airflow arch breaking component are both located in the tapered section.

[0006] The technical solution is further configured as follows: the knocking and arch breaking assembly includes a fixed cover and a hammer, the fixed cover is arranged on the outside of the silo wall, the hammer is arranged inside the fixed cover, and the hammer can produce horizontal displacement relative to the fixed cover.

[0007] The technical solution is further configured such that the end of the hammer extends to the outside of the fixed cover and is connected to one end of the connecting rod, the fixed cover is provided with a connecting seat, the connecting seat is hinged to the middle of the connecting rod, and the other end of the connecting rod is hinged to the annular seat; The annular seat is arranged on the periphery of the silo, and the annular seat can move along the vertical direction to pull or push the connecting rod to cause the hammer to move along the horizontal direction.

[0008] The technical solution is further configured such that the airflow arch breaking component includes a plurality of nozzles evenly distributed along the circumference of the silo, a plurality of air outlet channels of equal length are arranged inside the nozzles, the ends of the air outlet channels serve as air outlets, the air outlets are arranged obliquely upward, and a baffle which can rotate unidirectionally is arranged inside the air outlet channels.

[0009] The technical solution is further configured such that an air inlet chamber, a compression chamber and an air storage chamber which are interconnected are sequentially arranged inside the nozzle, and the diameter of the compression chamber is smaller than the diameter of the air inlet chamber. A valve core is arranged at the junction of the compression chamber and the air storage chamber, and the valve core can move along the axial direction of the air storage chamber to open or close the air storage chamber.

[0010] The technical solution is further configured that the airflow arch breaking component also includes a main air pipe connected to the nozzle, the main air pipe is installed on the periphery of the silo through a fixing component, the fixing component includes a fixing plate, a baffle plate and a pressing plate, and the main air pipe is located inside a cavity surrounded by the fixing plate, the baffle plate and the pressing plate; The fixed plate is connected to the outer side of the silo wall, the bottom of the baffle is connected to the fixed plate, the top of the baffle is rotatably connected to the pressure plate, and the pressure plate can produce a linear displacement relative to the baffle, causing the locking tongue on the pressure plate to engage with or move away from the fastener on the baffle.

[0011] The technical solution is further configured as follows: the rake tooth arch breaking assembly includes a swing shaft and rake teeth, and a plurality of rake teeth are arranged along the axial direction of the swing shaft. The swing shaft is arranged along the radial direction of the buffer bin, and one end thereof extends to the outside of the buffer bin and is connected to the swing driving assembly. The swing shaft can swing back and forth relative to the buffer bin.

[0012] The technical solution is further configured that the swing drive assembly includes a swing motor, a meshing gear and a rack, the gear is connected to the output end of the swing motor, a roller is provided on the rack, and a cam is provided at the end of the swing shaft; The swing motor drives the gear to rotate, and the gear is meshed with the rack. The rotational motion of the gear is converted into the linear motion of the rack. The roller moves synchronously with the rack. After the roller contacts the cam, it pushes the cam and the swing shaft to swing. After the roller separates from the cam, the cam and the swing shaft are reset. When the roller and the rack move in the opposite direction, the roller pushes the cam and the swing shaft to swing in the opposite direction and reset.

[0013] The technical solution is further configured such that the spiral blades include forward spiral blades and reverse spiral blades, and the forward spiral blades and reverse spiral blades are respectively located on both sides of the discharge port of the screw conveyor, and a cross bar is provided between the forward spiral blades and the reverse spiral blades. The beneficial effects of the present invention are: By setting up a knocking and arch-breaking component, the silo is knocked intermittently to achieve impact and vibration effects, thereby ensuring smooth flow of materials; by setting up an airflow arch-breaking component, the fluidized air can not only play a bridge-breaking role, but also provide nitrogen sealing for the silo to keep the materials dry; by setting up a rake-tooth arch-breaking component, large pieces of material entering the buffer silo are crushed again to prevent large pieces of material from entering the screw conveyor as a whole and causing blockage, thereby making the closed feeding screw conveyor smooth, reducing the probability of feeding blockage, and improving feeding and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of a feeding and conveying device for preventing bridging in an embodiment of the present invention; Figure 2 A schematic diagram of a knocking and breaking arch assembly for preventing bridging in an embodiment of the present invention; Figure 3 is a schematic diagram of the interior of a nozzle in an embodiment of the present invention; Figure 4 is a schematic diagram of an air outlet channel and a baffle in an embodiment of the present invention; Figure 5 is a side view of a fixing assembly according to an embodiment of the present invention; Figure 6 is a top view of a fixing assembly in an embodiment of the present invention; Figure 7 A top view of a rake tooth arch breaking assembly in an embodiment of the present invention; Figure 8 A side view of a swing drive assembly according to an embodiment of the present invention; Fig. 9 for Figure 1 Partial schematic diagram at point A in the middle; Fig.10 is a schematic diagram of a spiral blade in an embodiment of the present invention; In the attached drawings: 100, silo; 101, straight section; 102, tapered section; 200, buffer bin; 300, screw conveyor; 301, discharge port; 302, screw conveyor rod; 303, forward spiral blade; 304, reverse spiral blade; 305, cross bar; 400, knocking arch breaking assembly; 401, fixed cover; 402, hammer; 403, connecting rod; 404, connecting seat; 405, ear seat; 406, annular seat; 407, lead screw; 408, lead screw nut; 409, first spring; 500, airflow arch breaking assembly; 501, main air pipe; 502, nozzle; 503, air inlet chamber; 504, compression chamber; 505, Air storage chamber; 506, valve core; 507, second spring; 508, guide rod; 509, air outlet channel; 510, baffle; 511, annular mounting groove; 600, rake tooth arch breaking assembly; 601, swing shaft; 602, rake tooth; 700, fixing assembly; 701, fixing plate; 702, baffle; 703, pressure plate; 704, locking tongue; 705, fastener; 706, rotating shaft; 707, horizontal waist hole; 708, longitudinal waist hole; 800, swing drive assembly; 801, cam; 802, rack; 803, gear; 804, roller; 805, swing motor; 806, guide wheel; 807, hanging plate; 808, bearing plate. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0016] According to an embodiment of the present invention, a feeding and conveying device for preventing bridging is provided. Figure 1 , Figure 7 as well as Fig.10 ,include: A silo 100 is provided with a feeding port on its top, and a knocking arch breaking component 400 and an airflow arch breaking component 500 are provided on the silo, and the airflow arch breaking component 500 is connected to an external nitrogen source; The buffer bin 200 is located below the silo 100 and communicates with the silo 100, and a rake tooth arch breaking assembly 600 is disposed inside the buffer bin 200; And a screw conveyor 300, whose feed port is communicated with the buffer bin 200, and a screw conveyor rod 302 and a screw blade are arranged inside the screw conveyor.

[0017] It should be noted that, by setting up the knocking and arch breaking component 400, the silo 100 is intermittently knocked to achieve impact and vibration effects, thereby realizing smooth flow of materials; by setting up the airflow arch breaking component 500, the fluidized air can not only play a bridge-breaking role, but also provide nitrogen sealing for the silo to keep the materials dry; by setting up the rake tooth arch breaking component 600, the large pieces of material entering the buffer silo 200 are crushed again to prevent the large pieces of material from entering the screw conveyor 300 as a whole and causing blockage, so that the closed feeding screw can feed smoothly, reduce the probability of feeding blockage, and improve feeding and production efficiency.

[0018] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 The silo 100 includes a straight section 101 and a conical section 102 from top to bottom, and the knocking arch breaking component 400 and the airflow arch breaking component 500 are both located in the conical section 102.

[0019] It should be noted that the feed port is located in the straight section 101, and the conical section 102 facilitates smooth discharge of materials; by arranging the knocking arch breaking component 400 and the airflow arch breaking component 500 in the conical section 102, the probability of factors affecting normal material discharge, such as material bridging in the silo 100 and large pieces of material sticking to the wall, is reduced, thereby forming a bridge breaking effect.

[0020] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 as well as Figure 2 The knocking arch breaking assembly 400 includes a fixed cover 401 and a hammer 402. The fixed cover 401 is arranged on the outside of the silo wall of the silo 100, and the hammer 402 is arranged inside the fixed cover 401, and the hammer 402 can produce horizontal displacement relative to the fixed cover 401.

[0021] Specifically, the hammer 402 includes a hammer head end and a hammer handle end. The hammer head end is spherical and is disposed toward the silo 100. In the initial state, the hammer head end is separated from the silo 100. The fixed cover 401 adopts a frame structure. The hammer 402 is disposed in the horizontal direction. The hammer head end is disposed inside the fixed cover 401. The hammer handle end penetrates the fixed cover 401 and extends to the outside of the fixed cover 401. At the same time, a first spring 409 is provided on the outer periphery of the hammer handle end. The ends of the first spring 409 are respectively against the inner wall of the fixed cover 401 and the fixed block. The fixed block is disposed on the hammer handle end. The fixed cover 401 can protect the hammer head end and guide the hammer handle end.

[0022] It should be noted that when the hammer handle end is pushed, the hammer head end strikes the silo 100 to generate vibration; when the hammer handle end is pulled in the opposite direction, the hammer head end is separated from the silo 100 and resets, and the vibration disappears; the first spring 409 can buffer part of the pulling force to avoid the hammer head end colliding with the fixed cover 401 when resetting; repeatedly pushing and pulling the hammer handle end enables the hammer head end to intermittently strike the silo 100, achieving impact and vibration effects, and realizing smooth flow of materials.

[0023] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 as well as Figure 2 The end of the hammer 402 extends to the outside of the fixed cover 401 and is connected to one end of the connecting rod 403. The fixed cover 401 is provided with a connecting seat 404, and the connecting seat 404 is hinged to the middle of the connecting rod 403. The other end of the connecting rod 403 is hinged to the annular seat 406. The annular seat 406 is sleeved on the periphery of the silo 100 , and the annular seat 406 can move along the vertical direction to pull or push the connecting rod 403 to cause the hammer 402 to move along the horizontal direction.

[0024] Specifically, an ear seat 405 is provided on the annular seat 406, the middle part of the connecting rod 403 is hinged to the connecting seat 404, and the two ends of the connecting rod 403 are respectively hinged to the hammer handle end and the ear seat 405 to form a lever structure, the hinge point of the connecting rod 403 and the connecting seat 404 serves as a fulcrum, the hinge point of the connecting rod 403 and the hammer handle end serves as a first hinge point, and the hinge point of the connecting rod 403 and the ear seat 405 serves as a second hinge point, and the horizontal distance between the first hinge point and the fixed cover 401 is greater than the horizontal distance between the second hinge point and the fixed cover 401.

[0025] It should be noted that the annular seat 406 is arranged below the fixed cover 401. When the annular seat 406 moves downward in the vertical direction, it applies a downward pulling force to the connecting rod 403 through the ear seat 405. Under the action of the fulcrum, the connecting rod 403 pushes the hammer handle end, and the hammer head end strikes the silo 100 to generate vibration; when the annular seat 406 moves upward in the vertical direction, it applies an upward pulling force to the connecting rod 403 through the ear seat 405. Under the action of the fulcrum, the connecting rod 403 pulls the hammer handle end, and the hammer head end is separated from the silo 100 and reset, and the vibration disappears.

[0026] In addition, in order to enable the annular seat 406 to move in the vertical direction, a lead screw 407 rotatably connected to the silo 100 is provided in the vertical direction, and a lead screw nut 408 matching the thread of the lead screw 407 is provided on the annular seat 406. The rotational motion of the lead screw 407 is converted into linear motion of the lead screw nut 408, thereby enabling the annular seat 406 to move in the vertical direction.

[0027] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 , Figure 3 as well as Figure 4 The airflow arch-breaking component 500 includes a plurality of nozzles 502 evenly distributed along the circumference of the silo 100, and a plurality of air outlet channels 509 of equal length are arranged inside the nozzles 502. The ends of the air outlet channels 509 serve as air outlets, and the air outlets are arranged obliquely upward. A unidirectionally rotatable baffle 510 is arranged inside the air outlet channels 509.

[0028] Specifically, an annular mounting groove 511 is provided on the side wall of the air outlet channel 509, and the baffle 510 and the annular mounting groove 511 are rotatably arranged; the annular mounting groove 511 is inclinedly arranged near the side wall of the air outlet to facilitate the baffle 510 to rotate toward the air outlet, and the annular mounting groove 511 is horizontally arranged away from the side wall of the air outlet to limit the baffle 510.

[0029] It should be noted that the nozzle 502 is arranged inside the silo 100, and at the same time, the air outlet is arranged obliquely upward to transport nitrogen into the silo 100 to form fluidizing wind. The fluidizing wind can not only play a bridge-breaking role, but also provide nitrogen sealing for the silo to keep the material dry; a plurality of air outlet channels 509 are arranged with equal length to ensure that each air outlet has uniform air outlet, which can exert force on the material in all directions to improve the fluidity of the material; nitrogen with a certain air pressure is transported to the nozzle 502, and the baffle 510 is rotated toward the air outlet to open the air outlet channel 509 to facilitate the smooth passage of nitrogen; after the nitrogen is stopped from being transported, the baffle 510 rotates in the opposite direction under the action of its own gravity to achieve automatic resetting to prevent the material from entering the nozzle 502.

[0030] Preferably, multiple baffles 510 are arranged around the circumference of the air outlet channel 509, and the multiple baffles 510 can completely close the air outlet channel 509 after being reset; in order to avoid mutual interference between adjacent baffles 510, the end or edge of the baffle 510 can be set to a thin sheet shape.

[0031] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 , Figure 3 as well as Figure 4 The nozzle 502 is provided with an air inlet chamber 503, a compression chamber 504 and an air storage chamber 505 which are interconnected in sequence, and the diameter of the compression chamber 504 is smaller than the diameter of the air inlet chamber 503. A valve core 506 is provided at the junction of the compression chamber 504 and the air storage chamber 505. The valve core 506 can move along the axial direction of the air storage chamber 505 to open or close the air storage chamber 505.

[0032] Specifically, a guide rod 508 is arranged inside the air storage chamber 505 along its axial direction, and the valve core 506 is slidably arranged on the guide rod 508. At the same time, a second spring 507 is arranged between the valve core 506 and the air storage chamber 505, and the second spring 507 presses the valve core 506 against the junction of the compression chamber 504 and the air storage chamber 505.

[0033] Preferably, in order to prevent the valve core 506 from deflecting under the pushing action of nitrogen, the cross section of the guide rod 508 is set to be a cross shape, and a cross-shaped through hole is opened on the corresponding valve core 506.

[0034] It should be noted that the nitrogen flows through the air inlet chamber 503 to the compression chamber 504 to be further compressed and accumulated until the nitrogen is pressurized to be able to push open the valve core 506. The second spring 507 is compressed to cause the valve core 506 to retract, thereby forming a flow gap, and the nitrogen enters the air storage chamber 505 and enters the air outlet channel 509.

[0035] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 , Figures 3 to 6 The airflow arch breaking component 500 also includes a main air pipe 501 connected to the nozzle 502, and the main air pipe 501 is installed on the periphery of the silo 100 through a fixing component 700. The fixing component 700 includes a fixing plate 701, a baffle 702 and a pressing plate 703. The main air pipe 501 is located inside a cavity surrounded by the fixing plate 701, the baffle 702 and the pressing plate 703. The fixed plate 701 is connected to the outer side of the silo wall of the silo 100, the bottom of the baffle 702 is connected to the fixed plate 701, the top of the baffle 702 is rotatably connected to the pressure plate 703, and the pressure plate 703 can produce a linear displacement relative to the baffle 702, causing the locking tongue 704 on the pressure plate 703 to engage with or move away from the fastener 705 on the baffle 702.

[0036] Specifically, the baffle 702 is provided with a notch, and the pressure plate 703 is rotatably arranged in the notch through the rotating shaft 706. At the same time, the pressure plate 703 is provided with a connected transverse waist hole 707 and a longitudinal waist hole 708. When the rotating shaft 706 is located in the transverse waist hole 707, the pressure plate 703 can move left and right relative to the baffle 702. When the rotating shaft 706 is located in the longitudinal waist hole 708, the pressure plate 703 can move forward and backward relative to the baffle 702.

[0037] It should be noted that the main air pipe 501 is connected to the external nitrogen source. After the main air pipe 501 is installed in the cavity surrounded by the fixing plate 701, the baffle plate 702 and the pressing plate 703, at this time, the rotating shaft 706 is located at the rightmost end of the horizontal waist hole 707, the pressing plate 703 is rotated to form an L shape with the baffle plate 702, and then the pressing plate 703 is pushed, so that the rotating shaft 706 is located at the leftmost end of the horizontal waist hole 707, the locking tongue 704 and the baffle fastener 705 are arranged in a front-to-back manner, and the two are not matched. Finally, push along the front-to-back direction. The moving pressure plate 703 causes the rotating shaft 706 to be located at the innermost end of the longitudinal waist hole 708. At this time, the locking tongue 704 is engaged with the baffle fastener 705, and the pressure plate 703 is locked; when unlocking, the pressure plate 703 is pushed in the front-to-back direction, causing the rotating shaft 706 to be located at the outermost end of the longitudinal waist hole 708 (that is, the leftmost end of the transverse waist hole 707), and then the pressure plate 703 is pushed in the left-right direction, causing the rotating shaft 706 to be located at the rightmost end of the transverse waist hole 707. At this time, the pressure plate 703 can be rotated to be parallel to the baffle 702.

[0038] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 , Figures 7 to 9 The rake tooth arch breaking assembly 600 includes a swing shaft 601 and rake teeth 602. A plurality of rake teeth 602 are arranged along the axial direction of the swing shaft 601. The swing shaft 601 is arranged along the radial direction of the buffer bin 200, and one end thereof extends to the outside of the buffer bin 200 and is connected to the swing driving assembly 800. The swing shaft 601 can swing back and forth relative to the buffer bin 200.

[0039] Specifically, the rake teeth 602 on the same side of the swing shaft 601 are arranged at long and short intervals, and the rake teeth 602 on the opposite side of the swing shaft 601 are staggered to improve the crushing effect; in order to reduce the swing resistance of the rake teeth 602, the thickness of the upper and lower edges of the rake teeth 602 is thinned.

[0040] It should be noted that the swing drive assembly 800 drives the swing shaft 601 to rotate forward and backward to achieve swinging. During this process, the rake teeth 602 crush the large pieces of material inside the buffer bin 200 again to prevent the large pieces of material from entering the screw conveyor 300 as a whole and causing blockage.

[0041] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 , Figures 7 to 9 The swing drive assembly 800 includes a swing motor 805, a meshing gear 803 and a rack 802, the gear 803 is connected to the output end of the swing motor 805, a roller 804 is provided on the rack 802, and a cam 801 is provided at the end of the swing shaft 601; The swing motor 805 drives the gear 803 to rotate, and the gear 803 is meshed with the rack 802. The rotational motion of the gear 803 is converted into the linear motion of the rack 802. The roller 804 moves synchronously with the rack 802. After the roller 804 contacts the cam 801, it pushes the cam 801 and the swing shaft 601 to swing. The roller 804 continues to move until the roller 804 is separated from the cam 801, and the cam 801 and the swing shaft 601 are reset; when the roller 804 and the rack 802 move in the opposite direction, the roller 804 pushes the cam 801 and the swing shaft 601 to swing in the opposite direction and reset.

[0042] Specifically, a hanging plate 807 is arranged along the vertical direction on the outer side of the buffer bin 200, and a strip groove parallel to the rack 802 is provided on the hanging plate 807, and a guide wheel 806 embedded in the strip groove and capable of sliding along the strip groove is provided on the rack 802; a supporting plate 808 perpendicular to the hanging plate 807 is provided on the hanging plate 807, and the swing motor 805 is arranged on the supporting plate 808.

[0043] It should be noted that after the swing motor 805 is started, the gear 803 and the rack 802 are meshed and cooperated to drive the rack 802 to move back and forth repeatedly, and the roller 804 pushes the cam 801 and the swing shaft 601 to swing forward and reverse repeatedly.

[0044] In the feeding and conveying device for preventing bridging of this embodiment, please refer to Figure 1 as well as Fig.10 The spiral blades include a forward spiral blade 303 and a reverse spiral blade 304 , and the forward spiral blade 303 and the reverse spiral blade 304 are respectively located on both sides of the discharge port 301 of the screw conveyor, and a cross bar 305 is arranged between the forward spiral blade 303 and the reverse spiral blade 304 .

[0045] It should be noted that the material at the left end of the screw conveyor 300 is transported by the forward spiral blade 303 and pushed toward the discharge port 301; the material at the right end of the screw conveyor 300 is pushed back to the discharge port 301 by the reverse spiral blade 304, effectively preventing the material from accumulating at the right end of the screw conveyor 300; at the same time, the cross bar 305 is set corresponding to the discharge port 301 to crush the material again.

[0046] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A feeding and conveying device for preventing bridging, characterized in that: include: A silo, the top of which is provided with a feeding port, the silo is provided with a knocking arch breaking component and an airflow arch breaking component, and the airflow arch breaking component is connected to an external nitrogen source; A buffer bin, which is located below the silo and communicated with the silo, and has a rake tooth arch breaking assembly disposed inside the buffer bin; And a screw conveyor, whose feed port is communicated with the buffer bin, and inside which a screw conveyor rod and a screw blade are arranged.

2. A feeding and conveying device for preventing bridging according to claim 1, characterized in that: The silo includes a straight section and a conical section from top to bottom, and the knocking arch breaking component and the airflow arch breaking component are both located in the conical section.

3. A feeding and conveying device for preventing bridging according to claim 1, characterized in that: The knocking arch breaking assembly includes a fixed cover and a hammer. The fixed cover is arranged on the outside of the silo wall, and the hammer is arranged inside the fixed cover, and the hammer can produce horizontal displacement relative to the fixed cover.

4. A feeding and conveying device for preventing bridging according to claim 3, characterized in that: The end of the hammer extends to the outside of the fixed cover and is connected to one end of the connecting rod. The fixed cover is provided with a connecting seat, the connecting seat is hinged to the middle of the connecting rod, and the other end of the connecting rod is hinged to the annular seat; The annular seat is arranged on the periphery of the silo, and the annular seat can move along the vertical direction to pull or push the connecting rod to cause the hammer to move along the horizontal direction.

5. A feeding and conveying device for preventing bridging according to claim 1, characterized in that: The airflow arch-breaking component includes a plurality of nozzles evenly distributed along the circumference of the silo, a plurality of air outlet channels of equal length are arranged inside the nozzles, the ends of the air outlet channels serve as air outlets, the air outlets are arranged obliquely upward, and a baffle that can rotate unidirectionally is arranged inside the air outlet channels.

6. A feeding and conveying device for preventing bridging according to claim 5, characterized in that: An air inlet chamber, a compression chamber and an air storage chamber are sequentially arranged inside the nozzle, and the diameter of the compression chamber is smaller than the diameter of the air inlet chamber. A valve core is arranged at the junction of the compression chamber and the air storage chamber, and the valve core can move along the axial direction of the air storage chamber to open or close the air storage chamber.

7. A feeding and conveying device for preventing bridging according to claim 6, characterized in that: The airflow arch breaking assembly also includes a main air pipe connected to the nozzle, the main air pipe is installed on the periphery of the silo through a fixing assembly, the fixing assembly includes a fixing plate, a baffle plate and a pressing plate, and the main air pipe is located inside a cavity surrounded by the fixing plate, the baffle plate and the pressing plate; The fixed plate is connected to the outer side of the silo wall, the bottom of the baffle is connected to the fixed plate, the top of the baffle is rotatably connected to the pressure plate, and the pressure plate can produce a linear displacement relative to the baffle, causing the locking tongue on the pressure plate to engage with or move away from the fastener on the baffle.

8. A feeding and conveying device for preventing bridging according to claim 1, characterized in that: The rake tooth arch breaking assembly includes a swing shaft and rake teeth, and a plurality of rake teeth are arranged along the axial direction of the swing shaft. The swing shaft is arranged along the radial direction of the buffer bin, and one end thereof extends to the outside of the buffer bin and is connected to the swing driving assembly. The swing shaft can swing back and forth relative to the buffer bin.

9. A feeding and conveying device for preventing bridging according to claim 8, characterized in that: The swing drive assembly includes a swing motor, a meshing gear and a rack, the gear is connected to the output end of the swing motor, a roller is arranged on the rack, and a cam is arranged at the end of the swing shaft; The swing motor drives the gear to rotate, and the gear is meshed with the rack. The rotational motion of the gear is converted into the linear motion of the rack. The roller moves synchronously with the rack. After the roller contacts the cam, it pushes the cam and the swing shaft to swing. After the roller separates from the cam, the cam and the swing shaft are reset. When the roller and the rack move in the opposite direction, the roller pushes the cam and the swing shaft to swing in the opposite direction and reset.

10. A feeding and conveying device for preventing bridging according to claim 1, characterized in that: The spiral blades include forward spiral blades and reverse spiral blades, and the forward spiral blades and the reverse spiral blades are respectively located on both sides of the discharge port of the screw conveyor, and a cross bar is arranged between the forward spiral blades and the reverse spiral blades.

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