Powder conveying system and discharging device

Abstract

The utility model discloses a powder conveying system and a discharging device, the discharging device comprises a base and a positioning support, a safety cable is arranged between the base and the positioning support, one end of the safety cable is fixed on the base, and the other end of the safety cable is fixed on the positioning support; guide angle plates are installed at the four corners of the positioning support and are arranged in an inward inclined mode from top to bottom. The blanking assembly is mounted on the supporting frame and is communicated with the stock bin when the stock bin to be unloaded reaches a preset unloading position; the blanking assembly comprises a blanking pipe and an air bag assembly arranged on the side wall of the blanking pipe, and the air bag assembly tightly holds a discharge port of the stock bin when in an inflated state; the valve opening mechanism is mounted on the supporting frame; and the vibration mechanism is in transmission connection with the positioning bracket. Accurate positioning of the stock bin is achieved, and powder overflowing or dust raising in the discharging process is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying equipment, in particular to a powder conveying system and a discharge device. Background Art

[0002] In the biomedicine, food, chemical and other industries, powders are mostly transported through powder conveying systems. When unloading powders using mobile turnover silos, existing technologies mostly use simple brackets to complete the silo (barrel) positioning, valve opening and gravity discharge processes. Accuracy is difficult to guarantee during unloading, and manual adjustment of the silo is required. The position accuracy of the unloading device is poor, resulting in powder spillage or dust during the unloading process.

[0003] In view of this, providing a powder conveying system and a discharge device to achieve accurate positioning of the silo and prevent powder overflow or dust during the discharge process has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To this end, an embodiment of the present invention provides a powder conveying system and a discharge device to solve at least one technical problem existing in the above-mentioned prior art.

[0005] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides a discharge device for a powder conveying system, the discharge device comprising:

[0007] The support frame includes a base and a positioning bracket. A safety rope is provided between the base and the positioning bracket. One end of the safety rope is fixed to the base, and the other end is fixed to the positioning bracket. The positioning bracket is a square frame. Guide angle plates are installed at the four corners of the positioning bracket. The guide angle plates are tilted inward from top to bottom.

[0008] A blanking assembly is mounted on the support frame and is in communication with the silo when the silo to be unloaded reaches a preset unloading position; the blanking assembly includes a blanking tube and an airbag assembly provided on the side wall of the blanking tube, and the airbag assembly holds the discharge port of the silo tightly when inflated;

[0009] A valve opening mechanism, the valve opening mechanism being mounted on the support frame, the valve opening mechanism being adapted to the shape of the on-off valve of the silo and opening the on-off valve by rotating;

[0010] A vibration mechanism is connected to the positioning bracket through transmission, and the vibration mechanism drives the positioning bracket to vibrate.

[0011] Through the positioning plate with guide grooves, precise positioning is achieved. The valve opening mechanism is adjusted by a spring to ensure precise butt joint of the valve body. The vibration motor is used to solve the smoothness of discharging. The weighing module is used to monitor the flow state of the internal material in real time. The spring structure is used to solve the automatic concentricity of the discharge port of the silo and the butt joint device. The inflation air bag is inflated and deflated to ensure the sealing performance of discharging, and the problems of powder overflow and dust raising are solved.

[0012] In some embodiments, the positioning support is movably mounted on the base; the discharging assembly and the valve opening mechanism are both mounted on the positioning support, and the vibration mechanism is in transmission connection with the positioning support.

[0013] In some embodiments, the support frame further comprises:

[0014] The elastic buffer is a rubber spring, and four rubber springs are arranged at four corners of the base and the positioning support. One end of the rubber spring is fixed to the base, and the other end is fixed to the positioning support.

[0015] In some embodiments, the base is a square frame structure, and mounting legs are arranged at four corners of the base. Each mounting leg is fixed to the ground by an expansion bolt.

[0016] In some embodiments, the discharging assembly comprises:

[0017] The discharging pipe is mounted on the positioning support, and the discharge port of the silo is in communication with the discharging pipe.

[0018] The dust cover is turned over under the drive of the opening cover pneumatic swing cylinder to shield or avoid the pipe opening of the discharging pipe.

[0019] The spring structure is arranged in the circumferential direction of the discharging pipe.

[0020] In some embodiments, the air bag assembly comprises:

[0021] The air bag mounting seat is slotted on the inner side of the discharging pipe, and the air bag mounting seat is fixed in the slot.

[0022] The sealing air bag is embedded in the air bag mounting seat, and the sealing air bag is in communication with the air source through the air nozzle.

[0023] In some embodiments, the valve opening mechanism comprises:

[0024] The valve opening block cooperates with the on-off valve.

[0025] The valve opening pneumatic swing cylinder is in transmission connection with the valve opening block and drives the valve opening block to rotate.

[0026] In some embodiments, the valve opening mechanism further comprises a mounting seat, the mounting seat comprising a fixed frame, a movable frame and a movable plate, the fixed frame being mounted on the positioning support, the movable frame being connected to the movable frame through a vertical spring, and the movable plate being connected to the movable frame through a horizontal spring.

[0027] The valve opening pneumatic swing cylinder is mounted on the movable plate, the valve opening block is in transmission connection with the valve opening pneumatic swing cylinder and is mounted on one side of the valve opening pneumatic swing cylinder, and a position detection component is mounted on the other side of the valve opening pneumatic swing cylinder.

[0028] In some embodiments, the dustproof cover is connected to the output shaft of the cover opening pneumatic swing cylinder through a rotating shaft, the cover opening pneumatic swing cylinder is mounted on the positioning support through a fixed seat, and the rotating shaft is mounted on the positioning support through a bearing seat.

[0029] The utility model also provides a powder conveying system, including the unloading device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creative labor.

[0031] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the utility model that can be implemented, so they do not have the technical essence, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model.

[0032] Figure 1 The structure schematic view of the unloading device provided by the utility model is shown in the drawings.

[0033] Figure 2 The structure schematic view of the dustproof cover in the unloading device provided by the utility model is shown in the drawings.

[0034] Figure 3 The structure schematic view of the unloading pipe in the unloading device provided by the utility model is shown in the drawings.

[0035] Figure 4 The Figure 3 The sectional view in A-A direction in the unloading device provided by the utility model is shown in the drawings.

[0036] Figure 5 The structure schematic view of the valve opening mechanism in the unloading device provided by the utility model is shown in the drawings.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] 1-base, 2-positioning support, 3-rubber spring, 4-guide plate, 5-dust cover, 6-feeding pipe;

[0039] 7-sealing air bag, 8-valve opening mechanism, 9-charge level switch, 10-control box, 11-detection switch;

[0040] 12-vibration motor, 13-safety cable, 14-expansion bolt, 15-weighing module, 16-bearing seat;

[0041] 17-rotating shaft, 18-fixed seat, 19-cover opening pneumatic swing cylinder, 20-speed regulating valve, 21-cover opening detection switch;

[0042] 22-charge level switch seat, 23-air bag mounting seat, 24-sealing air bag, 25-air cock, 26-wave bead screw;

[0043] 27-adjusting spring, 28-valve opening block, 29-valve opening pneumatic swing cylinder, 30-detection component, 31-vertical spring; 32-horizontal spring, 33-fixed frame, 34-moving frame, 35-moving plate. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be described in detail by the specific embodiments, and the person skilled in the art can easily understand other advantages and effects of the present application from the disclosed content of the specification. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the present application.

[0045] In order to at least partially solve the problems that the existing technology cannot guarantee accurate positioning of the silo, accurate valve opening butt joint and detection in place, cannot guarantee smoothness in the unloading process, cannot monitor material flow dynamics in real time, it is difficult to guarantee automatic butt joint of the silo discharge port and the butt joint device, and cannot prevent powder overflow and dust raising in the unloading process, the present application provides an unloading device, which realizes accurate butt joint and accurate valve opening in the unloading process by setting the feeding assembly, the valve opening mechanism, the vibration mechanism and the controller, thereby avoiding powder overflow and dust raising.

[0046] The following will be described in detail Figures 1-5 The unloading device for powder conveying system provided by the present application is introduced.

[0047] In a specific embodiment, the unloading device is used in a powder conveying system, for example, in a powder conveying system in the biomedicine, food, chemical industry and the like. The unloading device comprises a support frame, a material falling assembly, a valve opening mechanism 8, a vibration mechanism, a sensor group and a controller; wherein the support frame is the basic structure of the whole unloading device, is usually fixed on the ground, and is used for supporting other parts of the device; the support frame is provided with a guide structure, for example, a positioning plate with a guide groove, and precise positioning can be achieved through the positioning plate with the guide groove. The material falling assembly is installed on the support frame and is in communication with the material bin when the material bin to be unloaded reaches the preset unloading position; specifically, when the sensor group detects that the material bin has reached the specified position, the material bin is in communication with the material falling assembly, so as to prepare for subsequent material falling operation. The valve opening mechanism 8 is installed on the support frame and opens the on-off valve of the material bin when the material bin reaches the unloading position; when the material bin reaches the unloading position, the valve opening mechanism 8 is started, and the valve opening mechanism 8 acts to open the on-off valve of the material bin, so that the discharge port of the material bin is opened, so as to prepare for subsequent material falling operation.

[0048] The vibration mechanism is in transmission connection with the support frame, and the vibration mechanism opens vibration in response to a starting instruction and stops vibration in response to a closing instruction; the vibration mechanism can be a vibration motor 12, and the smoothness of unloading is realized through the vibration motor 12, for example, the vibration motor 12 adopts a 40W power and can generate a 0.9KN exciting force, and can be used for a material bin less than 1000KG, and a self-provided adjustable eccentric block can adjust different exciting forces according to different requirements, and is low in energy and high in efficiency; theoretically, the vibration mechanism for assisting unloading can also be other pneumatic vibration components.

[0049] The sensor group is used for acquiring the current position of the material bin and the current weight of the material; specifically, the sensor group comprises a position sensor and a metering sensor, the position sensor is used for acquiring the current position of the material bin, for example, can be a photoelectric switch installed on the support frame, and triggers the photoelectric switch when the material bin falls into place; the metering sensor is used for acquiring the current weight of the material, for example, can be a weighing module 15 installed on the support frame, and the flow state of the internal material is monitored in real time through the weighing module 15, the corresponding weight value is dynamically given to the system through the deformation amount of the internal strain gauge, the flow state of the internal material of the material bin can be monitored in real time, the residual of the internal material can be accurately judged, and the operation is accurate and convenient.

[0050] The controller is configured to receive the current position of the bin and generate the start instruction when the current position reaches the unloading position; the controller is also configured to receive the current weight of the bin during the unloading process and generate the close instruction when the current weight is less than or equal to the weight threshold. Specifically, a control box can be mounted on the support frame, and the controller is arranged in the control box. The control box is integrated with an electrical button and other structures.

[0051] During operation, by detecting the current position of the bin, when the bin reaches the specified position, the machine is docked with the bin after the unloading assembly is docked, and then the switch valve of the bin is opened for unloading. At the same time, the vibration mechanism is used for auxiliary vibration unloading, which realizes the accurate positioning of the bin and prevents overflow or dust during unloading.

[0052] In order to ensure the stability of the support and at the same time avoid the influence of auxiliary vibration on the overall stability of the device, the support frame can adopt a split structure. Specifically, the support frame includes a base 1 and a positioning bracket 2, and a safety cable 13 can be arranged between the base 1 and the positioning bracket 2. One end of the safety cable 13 is fixed to the base 1, and the other end is fixed to the positioning bracket 2, so as to avoid separation of the base 1 and the positioning bracket 2. The base 1 is fixed to the ground, for example, the base 1 can be a square frame structure, and mounting legs are arranged at the four corners of the base 1 respectively. Each mounting leg is fixed to the ground by expansion bolts 14. The positioning bracket 2 is movably mounted to the base 1. Movably mounted means that the two can be movably connected by elastic members or buffer members, so that there is a certain vibration gap between them. The unloading assembly and the valve opening mechanism 8 are both mounted to the positioning bracket 2. The vibration mechanism is in transmission connection with the positioning bracket 2. When the vibration mechanism is started, it will drive the positioning bracket 2 to vibrate, and the unloading assembly will vibrate with the positioning bracket 2, thereby assisting the unloading of the bin and improving the unloading efficiency. The above-mentioned control box 10 is mounted on the base 1 and avoids the positioning bracket 2, so as to avoid the vibration of the control box 10 caused by the vibration of the positioning bracket 2, which will disturb the electrical elements.

[0053] In this embodiment, the positioning bracket 2 is a square frame, and guide angle plates are mounted at the four corners of the positioning bracket 2. The guide angle plates are inclined inward from top to bottom, which realizes the guiding and limiting functions during the process of the bin entering the positioning bracket 2, so that the bin can accurately fall into the positioning bracket 2 and be accurately docked with the unloading pipe 6. That is, the guide angle plates can correct the positional deviation of the bin by setting the chamfered section, so that the bin can be accurately slid into the clamping angle, thereby ensuring the accuracy of the working position of the bin. The above-mentioned photoelectric switch is mounted on the positioning bracket 2, and the weighing module 15 is mounted on the base 1, so as to avoid the influence of vibration on the weighing module 15 during positioning, thereby ensuring the weighing accuracy.

[0054] Further, in order to realize the movable connection of the positioning bracket 2 and the base 1, the support frame further comprises an elastic buffer, which is arranged between the base 1 and the positioning bracket 2, and the compression or elongation direction of the elastic buffer is at least the height direction. Specifically, the elastic buffer can be a rubber spring 3. Still taking the square frame embodiment as an example, the rubber spring 3 can be four, which is arranged at the four corners of the base 1 and the positioning bracket 2. One end of the rubber spring 3 is fixed with the base 1, and the other end is fixed with the positioning bracket 2, which effectively avoids the influence of the vibration of the positioning bracket 2 on the base 1.

[0055] In some embodiments, please continue to refer to Figure 1 , and please refer to Figures 2-4 , the blanking assembly comprises a blanking pipe 6 and a dust cover 5; wherein the blanking pipe 6 is installed on the positioning bracket 2, and the discharge port of the stock bin is communicated with the blanking pipe 6; a material level switch seat 22 is arranged laterally on the blanking pipe 6, and a spring structure is arranged in the circumferential direction of the blanking pipe 6. The blanking pipe 6 solves the automatic concentricity of the discharge port of the stock bin and the docking device through the spring structure. The spring structure inside the blanking pipe 6 can adapt to the concentricity correction when the stock bin discharge port enters the blanking pipe port in the circumferential direction, and compensate for the deviation function. It should be understood that the material level switch seat installs the material level switch, which senses the material in the stock bin, transmits a signal to the PLC, judges whether there is material falling in the stock bin, when the discharge port of the stock bin enters the air bag of the blanking pipe 2, the blanking pipe 2 is circumferentially movable in the stock bin bracket fixed on the positioning bracket, and the spring on the glass bead mounting shaft automatically compensates the concentricity of the discharge port of the stock bin and the blanking pipe. The dust cover 5 is turned over under the driving of the uncovering pneumatic swing cylinder 19 to shield or avoid the pipe port of the blanking pipe 6. The uncovering pneumatic swing cylinder 19 is opened in response to the uncovering instruction of the controller. The controller generates the uncovering instruction when the current position reaches the pre-set uncovering position, and the uncovering position is higher than the discharging position.

[0056] Furthermore, the problem of non-concentricity between the discharge port of the hopper and the sealing airbag is compensated by automatic adjustment, which reduces the repeated adjustment of the hopper position. The head of the glass bead is a ball, which can reduce the friction surface with the drop tube during the adjustment process and protect the smooth surface of the drop tube. There is a spring on the inside of the adjustment bracket. The bracket has four support ears on its circumference, which are fixed on the positioning bracket of the unloading station. The welded drop tube 6 is inserted into the bracket 1. There are six glass bead screws 26, and each glass bead screw 26 is distributed in the circumferential direction of the drop tube 6 to facilitate the circumferential movement of the drop tube 6, reducing friction and scratching the surface. The six glass bead screws 26 in this circumferential direction are installed in the glass bead mounting shaft, and a spring is installed on the mounting shaft. The mounting shaft, spring, and glass bead screws 26 are fixed together in the side circumferential fixing hole of the bracket 61. The upper end face of the bracket 61 also has six glass bead screw mounting holes evenly distributed around the circumference. The glass bead screws 26 are directly screwed in. The function is to support the upper end face after the drop tube is inserted into the bracket 61, and reduce friction resistance when the drop tube 6 moves.

[0057] Specifically, the dust cover 5 is connected to the output shaft of the cover-opening pneumatic swing cylinder 19 through the rotating shaft 17. The cover-opening pneumatic swing cylinder 19 is installed on the positioning bracket 2 through the fixing seat 18, and the rotating shaft 17 is installed on the positioning bracket 2 through the bearing seat 16. The cover-opening pneumatic swing cylinder 19 is also provided with a speed regulating valve 20, which can adjust its rotation speed according to the use requirements, thereby ensuring the smooth opening and closing of the dust cover 5. Theoretically speaking, in order to realize the opening and closing of the dust cover 5, its actuator is not limited to the form of the above-mentioned cover-opening pneumatic swing cylinder 19, and can also be a pneumatic or hydraulic actuator, etc. The dust cover 5 uses the speed regulating valve 20 to achieve the speed regulation function and the photoelectric switch or travel switch that detects the position of the switch 11, so that the actuator of the dust cover 5 has a signal feedback function and can realize 180-degree rotation of the switch cover, or rotation of the switch cover at various angles, flat movable switch cover, etc.

[0058] Furthermore, the blanking assembly also includes a sealing structure, which is mounted on the inner wall of the blanking tube and tightly engaged with the discharge port of the silo. Specifically, the sealing structure can be in the form of an airbag assembly, with a groove formed on the inner side of the blanking tube 6, and an airbag mounting seat 23 fixed in the groove. The airbag mounting seat 23 is embedded with a sealing airbag, which is connected to the air source via an air nozzle 25. When sealing is required, the air source is activated to inject air into the sealing airbag, causing the airbag to expand and press against the discharge port of the silo. After unloading is completed, the air in the sealing airbag is released.

[0059] In this way, by inflating the sealing airbag to ensure the sealing of unloading, the problems of powder overflow and dust are solved. After the sealing airbag inside the discharge pipe 6 is inflated to a certain pressure through the precision pressure reducing valve, it is tightly hugged to the outer wall of the silo discharge pipe to prevent powder overflow and dust during unloading, thereby avoiding environmental pollution. The precision pressure reducing valve can also protect the sealing airbag from being inflated and exploded.

[0060] In some embodiments, asFigure 5 As shown, the valve opening mechanism 8 comprises a valve opening block 28 and a valve opening pneumatic swing cylinder 29; wherein the valve opening block 28 cooperates with the on-off valve, in the working process, the valve opening block 28 is embedded in the on-off valve, the valve opening pneumatic swing cylinder 29 is started to drive the valve opening block 28 to rotate, and then the valve opening is realized. The valve opening pneumatic swing cylinder 29 is in transmission connection with the valve opening block 28 and is started in response to the valve opening instruction of the controller. The valve opening mechanism 8 comprises a mounting seat, the mounting seat comprises a fixed frame 33, a movable frame 34 and a movable plate 35, the fixed frame 33 is installed on the positioning support 2, the movable frame 34 is connected with the movable frame 33 through a vertical spring 31, the movable plate 35 is connected with the movable frame 34 through a horizontal spring 32, so as to realize the vertical and horizontal position adjustment, thereby adapting the position of the on-off valve. The valve opening pneumatic swing cylinder 29 is installed on the movable plate 35, the valve opening block 28 is in transmission connection with the valve opening pneumatic swing cylinder 29 and is installed on one side of the valve opening pneumatic swing cylinder 29, and a position detection component 30 is installed on the other side of the valve opening pneumatic swing cylinder 29.

[0061] In this way, the valve opening mechanism 8 guarantees the accurate butt joint of the valve body and the on-off in place through the spring adjustment and the detection switch 11 of the electronic feedback, the vertical spring 31 and the horizontal spring 32 in the valve opening mechanism 8 can automatically adjust the position of the valve opening block 28 upwards, downwards, leftwards and rightwards, thereby adapting the position of the butterfly valve of the material bin, the valve block of the butterfly valve is smoothly introduced into the valve opening mechanism 8, the position detection component 30 of the valve opening pneumatic swing cylinder 29 can detect whether the valve plate of the butterfly valve of the material bin is in place, and can also feed back to the system to judge the real-time position.

[0062] In addition to the above-mentioned discharging device, the utility model also provides a powder conveying system comprising the discharging device, and other parts of the powder conveying system are as the prior art, which will not be repeated here.

[0063] In order to facilitate understanding, the overall structure diagram and technical effect of the discharging device provided by the utility model are briefly described below by taking a specific use scene as an example.

[0064] The embodiment takes the IBC bin (barrel) turnover scene as an example, please continue to refer to Figures 1-5The unloading device comprises a base 1, a positioning support 2, a rubber spring 3, a positioning plate, a dust cover 5, a blanking pipe 6, a sealing air bag, a valve opening mechanism 8, a material level switch 9, a control box 10, a detection switch 11, a vibration motor 12, a safety cable 13, expansion bolts 14 and a weighing module 15. In the assembly process, the base 1 is first fixed to the ground by the expansion bolts 14, the weighing module 15 is arranged at the four corners of the base 1, the lower end of the weighing module 15 is connected to the base 1 by a connecting piece, the upper end of the weighing module 15 is connected to the rubber spring 3 by a connecting piece, the control box 10 is connected to the base 1, and the control box 10 needs to be separated from the positioning support 2 to ensure the accuracy of weighing, the upper part of the rubber spring 3 is connected to the positioning support 2, the base 1 is connected to the positioning support 2 through the safety cable 13 to ensure the stability of the structure, the guide plates 4 for positioning are welded at the four corners of the positioning support 2, the dust cover 5, the blanking pipe 6, the valve opening mechanism 8, the detection switch 11, the vibration motor 12 or other pneumatic vibration components needed by the auxiliary unloading device are all installed on the positioning support 2 by screws, the sealing air bag is installed in the U-shaped groove at the mouth of the blanking pipe 6, and the material level switch 9 is installed in the mounting seat of the blanking pipe 6.

[0065] The cover opening pneumatic swing cylinder 19 is fixed to the fixed seat 18 by screws, the rotating shaft 17 is connected to the dust cover 5 through the bearing seat 16 (containing a deep groove ball bearing), and in particular, the cover opening pneumatic swing cylinder 19 is provided with a speed regulating valve 20 and a cover opening detection switch 21, the speed regulating valve 20 has an adjusting function and can control the speed of the actuator, so that the rotating speed of the dust cover 5 in the mechanism is controllable, the cover opening detection switch 21 can detect whether the dust cover 5 is turned to the open position or the closed position, and can also feed back signals to the controller to determine the accurate position of the dust cover 5 in real time.

[0066] The material level switch seat 22 is welded on the blanking pipe 6, the adjusting springs 27 are uniformly arranged on the circumference of the blanking pipe 6, the air bag mounting seat 23 is formed by spinning and welding, is connected to the blanking pipe 6 through the wave bead screw 26, the air nozzle 25 is installed on the sealing air bag, and the sealing air bag is clamped in the air bag mounting seat 23; the sealing air bag needs to be connected to a precision pressure reducing valve to accurately control the inflation pressure, so that the air bag is inflated to a specified sealing pressure, tightly holds the outer wall of the discharge port of the material bin, achieves the sealing effect, and prevents the air bag from being over-inflated and exploding; the adjusting springs 27 can adapt to the concentricity correction when the discharge port of the material bin enters the mouth of the blanking pipe 6 in the circumferential direction, and compensate for the deviation function. The IBC material bin discharge port is connected to the air bag inflation sealing form, the air bag inflation pressure and the safety of the air bag are guaranteed through the precision pressure reducing valve, and the IBC material bin discharge port automatically finds the concentricity through the circumferentially distributed spring structure.

[0067] In the valve opening mechanism 8, the vertical spring 31 and the horizontal spring 32 are fixed on the mounting seat and can be adjusted up and down and left and right, the valve opening block 28 is installed on the valve opening pneumatic swing cylinder 29, and the valve opening pneumatic swing cylinder 29 is provided with a detection component 30; the vertical spring 31 and the horizontal spring 32 can automatically adjust the position of the valve opening mechanism 8 to adapt to the position of the butterfly valve of the material bin, so that the butterfly valve block is smoothly introduced into the valve opening mechanism 8, and the detection component 30 of the valve opening pneumatic swing cylinder 29 can detect whether the butterfly valve plate of the material bin is in place, and can also feed back to the controller to determine the real-time position of the valve opening block 28. The spring structure in the valve opening mechanism 8 used for opening the IBC bin butterfly valve plate can automatically adjust and adapt to the butterfly valve, and the actuator includes pneumatic, electric, hydraulic and other forms, and has the functions of position feedback and position detection, photoelectric switch, travel switch and the like.

[0068] During the working process, when the forked IBC bin (barrel) reaches the unloading device, in the working mode, the dustproof cover 5 is rotated by 180 degrees to open the material falling pipe 6 (the rotation of the dustproof cover 5 relies on the travel to position detection component 30 of the actuator, which ensures that the dustproof cover 5 is turned to position and the system detects the real-time position), after the bin is lifted to the specified height, it falls through the chamfered section of the guide plate 4 into the clamping angle, achieving precise positioning, and at the same time the bin triggers the detection switch 11, after the system detects that the bin is in the working position, the sealing air bag is inflated through the precision pressure reducing valve, the air bag is inflated outside, tightly holds the outer wall of the bin discharge pipe, and achieves the sealing effect, at the same time, the valve opening mechanism 8 is rotated by 90 degrees to open the IBC bin discharge port butterfly valve (the actuator of the valve opening mechanism 8 is provided with a travel to position detection component 30, which can ensure that the butterfly valve plate is opened and closed to position, and feeds back to the system in real time), the vibration motor 12 works at the same time, generates a vibration force and transmits it to the positioning support 2, and then transmits it to the IBC bin, so that the whole bin is vibrated to assist unloading, and the bottom four corners are buffered through the rubber spring 3 during the vibration process, the weighing module 15 records the material flow state in the IBC bin in real time and online during the unloading process, which can determine whether the material is completely discharged, the material level switch 9 signal can detect whether there is residual material on the inner wall of the material falling pipe 6, the safety cable 13 is used as a safety auxiliary tool to prevent the positioning support 2 from separating from the base 1 during the vibration process, the base 1 is used as a fixing mechanism of the whole device and is fixed on the ground through the expansion bolt 14, and the control box 10 completes the control of the whole device. The closed type automatic docking unloading device has the advantages of simple structure, convenient processing and manufacturing, low cost and energy consumption, and does not need manual operation during the whole material conveying process, which is labor-saving and convenient.

[0069] It should be understood that any pipe opening needs to be dustproof, and the same or similar actuators of the present technology are used, including pneumatic, electric, hydraulic and the like, the speed regulating valve is used to achieve the speed regulating function, and the detection switch is used to achieve the functions of position feedback and position detection, travel switch and the like, and has the signal feedback function; the 180-degree rotating switch cover, various angle rotating switch cover, parallel moving switch cover and the like.

[0070] The above detailed description of the specific embodiments of the present application, the purpose, technical solutions and beneficial effects of the present application have been further described in detail, and it should be understood that the above is only a specific embodiment of the present application, and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the present application shall be included in the protection scope of the present application.

Claims

1. A discharge device for a powder conveying system, characterized in that: The unloading device comprises: The support frame includes a base and a positioning bracket. A safety rope is provided between the base and the positioning bracket. One end of the safety rope is fixed to the base, and the other end is fixed to the positioning bracket. The positioning bracket is a square frame. Guide angle plates are installed at the four corners of the positioning bracket. The guide angle plates are tilted inward from top to bottom. A blanking assembly is mounted on the support frame and is in communication with the silo when the silo to be unloaded reaches a preset unloading position; the blanking assembly includes a blanking tube and an airbag assembly provided on the side wall of the blanking tube, and the airbag assembly holds the discharge port of the silo tightly when inflated; A valve opening mechanism, the valve opening mechanism being mounted on the support frame, the valve opening mechanism being adapted to the shape of the on-off valve of the silo and opening the on-off valve by rotating; A vibration mechanism is connected to the positioning bracket through transmission, and the vibration mechanism drives the positioning bracket to vibrate.

2. The unloading device according to claim 1, characterized in that: The positioning bracket is movably mounted on the base; the blanking assembly and the valve opening mechanism are both mounted on the positioning bracket, and the vibration mechanism is transmission-connected to the positioning bracket.

3. The unloading device according to claim 2, characterized in that: The support frame also includes: The elastic buffer is a rubber spring. There are four rubber springs, which are respectively arranged at the four corners of the base and the positioning bracket. One end of the rubber spring is fixed to the base, and the other end is fixed to the positioning bracket.

4. The unloading device according to claim 1, characterized in that: The base is a square frame structure with mounting feet at the four corners of the base, each mounting foot being fixed to the ground by expansion bolts.

5. The unloading device according to claim 1, characterized in that: The blanking assembly comprises: A drop pipe, the drop pipe is installed on the positioning bracket, and the discharge port of the silo is connected to the drop pipe; A dust cover, which is turned over by the driving of a pneumatic swing cylinder for opening the cover to cover or avoid the pipe opening of the blanking pipe; A spring structure is provided on the circumference of the blanking tube.

6. The unloading device according to claim 1, characterized in that: The airbag assembly comprises: An airbag mounting seat is slotted on the inner side of the blanking tube and is fixed in the slot; The sealing airbag is embedded in the airbag mounting seat and is connected to the air source through an air nozzle.

7. The unloading device according to claim 1, characterized in that: The valve opening mechanism comprises: A valve opening block, the valve opening block cooperates with the switch valve; The valve-opening pneumatic swing cylinder is in transmission connection with the valve-opening block and drives the valve-opening block to rotate.

8. The unloading device according to claim 7, characterized in that: The valve opening mechanism further includes a mounting seat, which includes a fixed frame, a movable frame and a movable plate. The fixed frame is mounted on the positioning bracket, the movable frame is connected to the movable frame via a vertical spring, and the movable plate is connected to the movable frame via a transverse spring. The valve opening pneumatic swing cylinder is installed on the movable plate, the valve opening block is transmission-connected to the valve opening pneumatic swing cylinder and is installed on one side of the valve opening pneumatic swing cylinder, and a position detection component is installed on the other side of the valve opening pneumatic swing cylinder.

9. The unloading device according to claim 5, characterized in that: The dust cover is connected to the output shaft of the cover-opening pneumatic swing cylinder through a rotating shaft. The cover-opening pneumatic swing cylinder is installed on the positioning bracket through a fixing seat. The rotating shaft is installed on the positioning bracket through a bearing seat.

10. A powder conveying system, characterized in that: The device comprises a discharge device as described in any one of claims 1 to 9.

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