A discharging device and a negative-pressure bulk material conveying system using the discharging device

Abstract

The present invention relates to a discharging device and a negative pressure bulk material conveying system using the discharging device. The discharging device includes: a discharging hopper, which includes an inner hopper and an outer hopper arranged separately; the lower part of the inner hopper is inserted into the outer hopper, and a discharge port is arranged at the bottom of the outer hopper. The outer hopper is swingably suspended and assembled under the inner hopper through a swing connection structure, so that the outer hopper can swing relative to the inner hopper to a vertical position under the action of gravity, ensuring vertical material discharge. Since the outer hopper is swingably suspended and assembled under the inner hopper through a swing connection structure, the outer hopper can swing relative to the inner hopper to a vertical position under the action of gravity, ensuring vertical material discharge. The negative pressure bulk material conveying system in the present invention can adopt a negative pressure receiving bin, a negative pressure elevator and a negative pressure belt conveyor. The negative pressure elevator feeds the bulk materials in the negative pressure receiving bin into the negative pressure belt conveyor, and the discharging device is arranged at the discharging end of the negative pressure belt conveyor.

Description

Technical Field

[0001] The present invention relates to a discharging device and a negative pressure bulk material conveying system using the discharging device. Background Art

[0002] At present, grain storage enterprises need to use equipment with a short length, easy to move, lap and adjust the height of grain discharging. Among them, the relatively common one is the mobile idler belt conveyor, which is used to convey incoming grain into a warehouse and stack the grain, or output the grain from a warehouse or a flat-bottomed shallow silo and load it onto a vehicle.

[0003] Generally, the commonly used mobile idler belt conveyor is fully open, and dust escapes everywhere during the conveying process and when the empty belt returns. Especially at the grain receiving part at the tail and the grain discharging part at the head, the dust is scattered seriously, which seriously pollutes the environment, makes grain storage enterprises deeply criticized, and also affects the health of operating workers.

[0004] To solve the above problems, when transporting materials that are easy to generate dust, more and more air-cushion belt conveyors are adopted. It is provided with air holes on the pan groove, and pressurized air is discharged from the air holes to form an air film under the conveyor belt, and the conveyor belt is supported by the air film. For example, the air-cushion belt conveying equipment disclosed in the Chinese utility model patent with the authorization publication number CN212638809U, and the belt conveyor disclosed in the Chinese invention patent application with the application publication number CN109516146A. For such belt conveyors, the discharging hopper arranged at the tail of the conveyor is usually fixed. When the belt conveyor is inclined, the discharging hopper is also inclined. The material always preferentially slides along the single side wall of the discharging hopper. The single side wall of the discharging hopper is often under greater pressure and the force is uneven. It is easy to be broken on one side after long-term work and needs to be replaced. Moreover, dust is more likely to be generated during inclined discharging. Of course, some discharging hoppers are specially designed at corresponding angles to make the discharging hopper arranged vertically. However, in actual work, for an inclined conveyor, it is often necessary to adjust the inclination of the conveyor according to different actual transportation scenarios to obtain a suitable height. After adjusting the inclination, the discharging hopper will be re-arranged relatively inclined again, resulting in the failure of the original vertical design. Summary of the Invention

[0005] The purpose of the present invention is to provide a discharging device to solve the technical problem that the discharging hopper is relatively fixed in the prior art, resulting in the discharging hopper being re-arranged relatively inclined after the inclination of the belt conveyor is adjusted; the present invention also provides a negative pressure bulk material conveying system using the above discharging device.

[0006] To achieve the above purpose, the technical solution of the discharging device provided by the present invention is: a discharging device, including:

[0007] A discharge hopper is used to be installed at the discharge end of a corresponding negative-pressure bulk material conveying system. The bottom of the discharge hopper is provided with a discharge opening for discharging materials, and the discharge opening is arranged downward.

[0008] The discharge hopper includes an inner hopper and an outer hopper which are separately arranged.

[0009] For the inner hopper, a fixed connection part is arranged at the upper part for fixedly installing at the discharge end of the negative-pressure bulk material conveying system. The lower part of the inner hopper is inserted into the outer hopper, and a material dropping opening is arranged at the bottom of the inner hopper.

[0010] For the outer hopper, the aforesaid discharge opening is arranged at the bottom. The outer hopper is suspended and assembled below the inner hopper through a swing connection structure and can swing relative to the inner hopper under the action of gravity, so that the outer hopper can swing to a vertical position relative to the inner hopper under the action of gravity to ensure vertical material dropping.

[0011] The beneficial effects are as follows: In the discharge device of the negative-pressure bulk material conveying system provided by the present invention, the discharge hopper includes an inner hopper and an outer hopper. The outer hopper is suspended and assembled below the inner hopper through a swing connection structure and can swing relative to the inner hopper. When the negative-pressure bulk material conveying system is arranged obliquely, the outer hopper can swing to a vertical position relative to the inner hopper under the action of gravity to ensure vertical material dropping. In this way, the problems of dust generation and spilling caused by inclined discharging can be effectively reduced. Moreover, such a discharge hopper can be applied to different working conditions. After adjustment within a general inclination range, due to the automatic swing of the outer hopper, vertical material dropping can be ensured, and the problems caused by inclined discharging can be effectively avoided.

[0012] As a further improvement, the swing connection structure is a hinge connection structure or a hook connection structure.

[0013] The hinge connection structure includes a horizontal hinge shaft and a hinge sleeve used in cooperation. One of the horizontal hinge shaft and the hinge sleeve is arranged on the inner hopper, and the other is arranged on the outer hopper.

[0014] The hook connection structure includes a hook and a hook mating part used in cooperation. One of the hook and the hook mating part is arranged on the inner hopper, and the other is arranged on the outer hopper.

[0015] The beneficial effects are as follows: The swing connection structure adopts a hinge connection structure or a hook connection structure, which can not only ensure the connection strength but also facilitate assembly.

[0016] As a further improvement, a discharge cylinder section is arranged on the outer hopper. The bottom of the discharge cylinder section has the aforesaid discharge opening, and a central baffle is arranged in the discharge cylinder section. An annular material dropping channel is formed between the central baffle and the discharge cylinder section.

[0017] The beneficial effects are as follows: when the inner hopper discharges material from the discharge opening, the central baffle will play a certain blocking role. At this time, when discharging material through the annular discharge channel, it is easy to form a material column that is thin in the middle and relatively dense on the outside. In this way, the gas in the middle follows the material column downward, and the peripheral gas replenishes, so that the dust inside the material column is pressed inside the material column, and it is not easy to cause dust emission. At the same time, the material is not easy to spill during the free-falling process.

[0018] As a further improvement, both the discharge cylinder section and the central baffle are arranged in a way that is larger at the top and smaller at the bottom, and the central baffle is installed in the discharge cylinder section in a height-adjustable manner along the vertical direction.

[0019] As a further improvement, a valve ball is installed on the outside of the inner hopper through an elastic connection structure, and the valve ball is used to block the discharge opening. The elastic connection structure applies an elastic force to the valve ball that forces the valve ball to move towards the direction of blocking the discharge opening.

[0020] The beneficial effects are as follows: a valve ball is provided at the discharge opening of the upper hopper body to control the amount of material falling into the lower hopper body, which can not only achieve discharge control but also ensure the effective formation of a material column that is thin in the middle and relatively dense on the outside.

[0021] As a further improvement, the elastic connection structure includes tension springs. A plurality of tension springs are distributed circumferentially along the inner hopper. The lower part of the inner hopper is in a conical structure that is larger at the top and smaller at the bottom, and the tension springs extend along the taper of the inner hopper and closely adhere to the outer side surface of the inner hopper.

[0022] The beneficial effects are as follows: the elastic connection structure uses tension springs, which facilitates the installation and control of the valve ball. Moreover, the tension springs are arranged along the taper of the upper hopper body and closely adhere to the upper hopper body, which not only ensures the elastic pulling force but also facilitates installation.

[0023] As a further improvement, the discharge opening of the inner hopper maintains a set inclination angle with the axis of the inner hopper, so as to make the discharge opening of the inner hopper close to horizontal when the discharge hopper is installed at the discharge end of the negative-pressure bulk material conveying system.

[0024] The beneficial effects are as follows: making the discharge opening of the inner hopper close to horizontal can relatively reduce the impact on the inclined outer hopper during discharging.

[0025] The technical solution of the negative-pressure bulk material conveying system provided by the present invention is: a negative-pressure bulk material conveying system, including:

[0026] A conveying device for conveying materials;

[0027] The conveying device includes a conveying main body, a head device, and a tail device. The conveying main body is arranged between the head device and the tail device, and a discharging device is provided at the discharging end of the head device;

[0028] The discharging device includes:

[0029] A discharging hopper, which is used to be installed at the discharging end of the corresponding negative-pressure bulk material conveying system. The bottom of the discharging hopper is provided with a discharging port for discharging materials, and the discharging port is arranged downward.

[0030] The discharging hopper includes an inner hopper and an outer hopper which are separately arranged.

[0031] For the inner hopper, a fixed connection part is arranged at the upper part for fixedly installing at the discharging end of the negative-pressure bulk material conveying system. The lower part of the inner hopper is inserted into the outer hopper, and a blanking port is arranged at the bottom of the inner hopper.

[0032] For the outer hopper, the discharging port is arranged at the bottom. The outer hopper is suspended and assembled below the inner hopper through a swing connection structure so as to be swingable relative to the inner hopper. In this way, under the action of gravity, the outer hopper can swing relative to the inner hopper to a vertical position to ensure vertical material dropping.

[0033] The beneficial effect is that in the negative-pressure bulk material conveying system provided by the present invention, the discharging hopper of the discharging device includes an inner hopper and an outer hopper. The outer hopper is suspended and assembled below the inner hopper through a swing connection structure so as to be swingable relative to the inner hopper. When the negative-pressure bulk material conveying system is arranged obliquely, the outer hopper can swing relative to the inner hopper to a vertical position under the action of gravity to ensure vertical material dropping. In this way, the problems of dusting and spilling caused by inclined discharging can be effectively reduced. Moreover, such a discharging hopper can be applied to different working conditions. After adjustment within a general inclination range, due to the automatic swing of the outer hopper, vertical material dropping can be ensured, and the problems caused by inclined discharging can be effectively avoided.

[0034] As a further improvement, the swing connection structure is a hinge connection structure or a hook connection structure.

[0035] The hinge connection structure includes a horizontally hinged shaft and a hinge sleeve used in cooperation. One of the horizontally hinged shaft and the hinge sleeve is arranged on the inner hopper, and the other is arranged on the outer hopper.

[0036] The hook connection structure includes a hook and a hook matching part used in cooperation. One of the hook and the hook matching part is arranged on the inner hopper, and the other is arranged on the outer hopper.

[0037] The beneficial effect is that the swing connection structure adopts a hinge connection structure or a hook connection structure, which can not only ensure the connection strength but also facilitate assembly.

[0038] As a further improvement, a discharging cylinder section is arranged on the outer hopper. The bottom of the discharging cylinder section has the discharging port, and a central baffle is arranged in the discharging cylinder section. An annular blanking channel is formed between the central baffle and the discharging cylinder section.

[0039] The beneficial effects are as follows: when the material outlet of the inner hopper discharges materials, the central baffle will play a certain blocking role. At this time, when the materials fall through the annular material falling channel, it is easy to form a material column with a thin middle part and a relatively dense outer part. In this way, the gas in the middle follows the material column downward, and the peripheral gas replenishes, so that the dust inside the material column is pressed inside the material column, which is not easy to cause dust flying. At the same time, the materials are not easy to spill during the free fall process.

[0040] As a further improvement, both the discharge barrel section and the central baffle are arranged in a way that is larger at the top and smaller at the bottom, and the central baffle is installed in the discharge barrel section in a height-adjustable manner along the up and down direction.

[0041] As a further improvement, a valve ball is installed on the outer side of the inner hopper through an elastic connection structure. The valve ball is used to block the material outlet, and the elastic connection structure applies an elastic acting force to the valve ball to force the valve ball to move towards the direction of blocking the material outlet.

[0042] The beneficial effects are as follows: a valve ball is arranged at the material outlet of the upper hopper body to control the amount of materials falling into the lower hopper body, which can not only achieve the control of material falling, but also ensure the effective formation of a material column with a thin middle part and a relatively dense outer part.

[0043] As a further improvement, the elastic connection structure includes tension springs. A plurality of tension springs are distributed circumferentially along the inner hopper. The lower part of the inner hopper is in a conical structure that is larger at the top and smaller at the bottom, and the tension springs extend along the taper of the inner hopper and closely adhere to the outer side surface of the inner hopper.

[0044] The beneficial effects are as follows: the elastic connection structure adopts tension springs, which is convenient for the installation and control of the valve ball. Moreover, the tension springs are arranged along the taper of the upper hopper body and closely adhere to the upper hopper body, which not only ensures the elastic tension effect but also is convenient for installation.

[0045] As a further improvement, the material outlet of the inner hopper maintains a set inclination angle with the axis of the inner hopper, so as to make the material outlet of the inner hopper close to horizontal when the discharge hopper is installed at the discharge end of the negative pressure bulk material conveying system.

[0046] The beneficial effects are as follows: making the material outlet of the inner hopper close to horizontal can relatively reduce the impact on the inclined outer hopper during material falling.

[0047] As a further improvement, the negative pressure bulk material conveying system is an inclined belt negative pressure bulk material conveying system, the head device is located above the tail device, a conveying belt is arranged inside the conveying body, a receiving hopper is arranged on the conveying body, the receiving hopper is arranged close to the tail device, and a rubber material baffle plate is arranged in the conveying equipment corresponding to the receiving hopper, the rubber material baffle plate is located directly below the receiving hopper to receive the falling material, the rubber material baffle plate extends obliquely, and the material receiving side of the rubber material baffle plate is arranged away from the tail device, and the lower end of the rubber material baffle plate is arranged close to the conveying belt to prevent the material on the conveying belt from flowing back toward the tail device.

[0048] The beneficial effect is that the use of the rubber baffle plate can not only reduce material damage when receiving the material, but also, when the lower end of the rubber baffle plate is arranged close to the conveyor belt, it can effectively prevent the material from flowing back toward the tail device. Moreover, the use of the rubber baffle plate can also prevent the conveyor belt from being damaged by knocks.

[0049] As a further improvement, the negative pressure bulk material conveying system is an inclined negative pressure bulk material conveying system, the head device is located above the tail device, and a support wheel is arranged on the conveying equipment near the tail device. The negative pressure bulk material conveying system also includes a moving frame, the moving frame includes a moving seat, a moving wheel is arranged on the moving seat, a fixed bracket and a sliding bracket are arranged on the moving seat, the fixed bracket and the sliding bracket are arranged at intervals along the length direction of the conveying equipment to form an angular support structure with an opening facing upward, the fixed bracket is hingedly assembled with the conveying equipment, the sliding bracket is assembled with the sliding support of the conveying equipment, at least one of the fixed bracket and the sliding bracket is hingedly assembled with the moving seat, and a spacing adjustment structure is arranged corresponding to the fixed bracket and the sliding bracket, which is used to adjust the distance between the fixed bracket and the sliding bracket, and then the inclination angle of the conveying equipment is adjusted by adjusting the supporting position of the sliding bracket and the conveying equipment.

[0050] The beneficial effect is that the spacing adjustment structure can be used to conveniently adjust the spacing between the fixed bracket and the sliding bracket, thereby adjusting the supporting position relationship between the sliding bracket and the conveying equipment, thereby facilitating the adjustment of the inclination angle of the conveying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a schematic structural diagram of the negative pressure bulk material conveying system provided by the present invention;

[0052] Figure 2 for Figure 1 Structural diagram of the middle discharge hopper;

[0053] Figure 3 for Figure 1 Schematic diagram of the assembly of the middle suspension bracket, screw rod and outer bucket;

[0054] Figure 4 forFigure 1 The structural diagram of the conveying body in the middle corresponding to the receiving hopper;

[0055] Figure 5 for Figure 4 The left schematic diagram of

[0056] Figure 6 For two or more Figure 1 The schematic diagram of the structure of the negative pressure bulk material conveying system shown in FIG.

[0057] Figure 7 A schematic structural diagram of Example 7 of the negative pressure bulk material conveying system provided by the present invention;

[0058] Figure 8 for Figure 7 Schematic diagram of the medium negative pressure silo.

[0059] Description of reference numerals:

[0060] 1. Discharge hopper; 11. Inner hopper; 12. Outer hopper; 121. Receiver barrel section; 122. Discharge barrel section; 13. Swing connection structure; 14. Tension spring; 15. Valve ball; 16. Screw rod; 17. Suspension bracket; 18. Center baffle body; 2. Support wheel; 3. Receiver hopper; 4. Moving wheel; 5. Sliding bracket; 6. Fixed bracket; 7. Adjusting wheel; 8. Safety block; 9. Steel cable; 10. Driving device; 30. Feed shoe; 31. Adjustable baffle plate ; 32. Rubber baffle plate; 33. Adjusting bolt; 100. Conveying equipment; 101. Conveying body; 102. Tail device; 103. Head device; 201. First negative pressure bulk material conveying system; 202. Second negative pressure bulk material conveying system; 203. Chute; 41. Negative pressure receiving silo; 411. Material container; 412. Steel grid dust plate; 413. Fan; 42. Elevator; 43. Negative pressure belt conveyor; 44. Negative pressure unloading device. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0062] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0063] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude other elements in the process, method.

[0064] In the description of the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" may be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and may be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the term "provided with" may be understood in a broad sense. For example, the object of "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and this connection may be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0066] The present invention will be further described in detail below with reference to embodiments.

[0067] Specific Embodiment 1 of the negative-pressure bulk material conveying system provided by the present invention:

[0068] As Figures 1 to 5As shown in the figure, the negative pressure bulk material conveying system in this embodiment is an inclined belt type conveying system. The negative pressure bulk material conveying system includes a moving frame, and a conveying device 100 is installed on the moving frame. The conveying device 100 as a whole includes a conveying main body 101, a head device 103 and a tail device 102. The conveying main body 101 is arranged between the head device 103 and the tail device 102. Here, the negative pressure bulk material conveying system is of an inclined structure, and the head device 103 is located above the tail device 102. A receiving hopper 3 is arranged at a position of the conveying main body 101 close to the tail device 102 for receiving the falling material. A conveying belt is arranged inside the conveying main body 101. The material entering through the receiving hopper 3 is transported by the conveying belt towards the head device 103 and falls by a discharging device arranged at the discharging end of the head device 103.

[0069] Here, the conveying device 100 is specifically an air cushion belt type conveying device 100, and the specific structure is the air cushion belt type conveying device 100 disclosed in the Chinese utility model patent with the authorization announcement number CN212638809U. The conveying main body 101 of this kind of conveying device 100 is of a truss structure, including a lower chord, vertical web members and intermediate sections. The intermediate sections are of box girder structures, and the intermediate sections are connected in sequence to form the upper chord of the truss structure. Through the assembly of the vertical web members and the lower chord, the whole conveying main body 101 forms an integral structure. An air chamber is arranged on the conveying main body 101, and the air chamber is connected with an air supply device for forming an air film to support the conveyor belt. Of course, in other embodiments, the conveying device 100 can also adopt the air cushion belt type conveying device disclosed in the Chinese utility model patent with the authorization announcement number CN212638809U, or a belt conveyor disclosed in the Chinese invention patent application with the application publication number CN109516146A. Of course, in other embodiments, the conveying device 100 can also adopt other conveying devices in the prior art.

[0070] Actually, the negative pressure bulk material conveying system in this embodiment is a self - circulating fully enclosed micro - negative pressure belt conveyor. A respective air supply system is configured for each negative pressure bulk material conveying system. The air supply system includes a dust removal part and an air supply part. Valves are respectively arranged at the connection part between the fan and the dust collector, the connection part between the fan and the air chamber, and the connection part between the fan and the outside for adjusting the air inlet and outlet air volumes. The dust removal part uses devices such as bag - type dust collectors and centrifugal dust collectors that can remove the dust in the air inhaled from the negative pressure bulk material conveying system, or uses head dust removal; the air supply part uses a high - pressure fan, and a T - shaped pipe is arranged at its air outlet, one end supplies the negative pressure bulk material conveying system, and the other end is connected to the outside.

[0071] In fact, the self-circulation inside each negative-pressure bulk material conveying system is completed by a single fan for both blowing and suction, ensuring that the inside of the negative-pressure bulk material conveying system is in a negative-pressure state, and also maintaining a negative pressure at the feeding port and the discharging port. Moreover, bag filters, centrifugal dust collectors, etc. are provided on the corresponding air paths to remove the dust in the air inhaled from the negative-pressure bulk material conveying system.

[0072] Generally speaking, for better protection, a flexible transparent or non-transparent curtain can be configured at the head device 103 for easy observation.

[0073] As Figure 1 shown, the entire conveying device 100 is installed on a moving frame. The moving frame is used to arrange the conveying device 100 obliquely, with the head device 103 located above the tail device 102. To ensure effective support, a support wheel 2 is provided at a position on the conveying device 100 close to the tail device 102. Together with the moving frame, stable support and normal movement are ensured.

[0074] The moving frame generally includes a moving seat. Moving wheels 4 are provided at the top of the moving seat. A fixed bracket 6 and a sliding bracket 5 are assembled on the moving seat. Among them, the fixed bracket 6 is fixed on the moving seat, and the sliding bracket 5 is hingedly assembled on the moving seat. Moreover, the fixed bracket 6 and the sliding bracket 5 are arranged at intervals along the length direction of the conveying device 100 to form an angular support structure with an upward opening, and the two brackets are used in cooperation to support the entire conveying device 100. Here, the fixed bracket 6 is hingedly assembled with the conveying device 100, while the sliding bracket 5 is slidably supported and assembled with the conveying device 100. To facilitate height adjustment, a distance adjustment structure is provided corresponding to the fixed bracket 6 and the sliding bracket 5 for adjusting the distance between the fixed bracket 6 and the sliding bracket 5. The distance adjustment structure here is specifically a steel cable 9 tensioning structure. The steel cable 9 tensioning structure includes adjustment wheels 7 provided on the fixed bracket 6 and the sliding bracket 5, and also includes a steel cable 9 wound around the adjustment wheels 7. A driving device 10 is connected to one end of the steel cable 9 for applying a force to force the fixed bracket 6 and the sliding bracket 5 to approach each other by pulling the steel cable 9, and then adjusting the inclination angle of the conveying device 100 by adjusting the support position of the sliding bracket 5 and the conveying device 100. The driving device 10 here can specifically adopt a method of combining a motor with a reel, or directly use an electric push rod to pull the steel cable 9 to act.

[0075] Generally speaking, one end of the steel cable 9 can be fixedly connected to the adjustment wheel 7 on the fixed bracket 6 or the movable bracket. After passing around the adjustment wheels 7 on the two brackets, it is connected to the output end of the driving device 10. The driving device 10 pulls the steel cable 9 to force the movable bracket to rotate, thereby realizing height adjustment to meet the requirements of different working conditions.

[0076] Since the steel cable 9 is used to pull the two brackets, a safety stopper 8 is provided at the bottom end of the conveying device 100 to ensure safety. The sliding bracket 5 is located between the fixed bracket 6 and the safety stopper 8. When the sliding bracket 5 is in its sliding stroke or even exceeds the sliding stroke and is pushed and matched with the safety stopper 8, the moving position of the sliding bracket 5 is limited by the safety stopper 8. At this time, the inclination angle of the conveying device 100 changes to the extreme position, thereby effectively avoiding safety accidents.

[0077] In fact, according to actual needs, power can be configured on the moving seat to realize mechanical drive, or no power can be configured and the movement can be driven manually.

[0078] like Figure 1 , Figure 4 and Figure 5 As shown, a receiving hopper 3 is provided on the conveying body 101, and the receiving hopper 3 is arranged near the tail device 102. The receiving hopper 3 is provided on the conveying body 101 through a feed shoe 30. The feed shoe 30 is provided on the air chamber of the conveying body 101 and is connected to the upper cover plate of the conveying body 101 as a whole. The receiving hopper 3 is fixedly mounted on the feed shoe 30. The receiving hopper 3 is an inverted cone structure, so that the incoming materials are stably collected into the conveying device 100 without being scattered around.

[0079] Adjustable baffle plates are arranged on both sides of the feed shoe 30, and the top of the adjustable baffle plates is hingedly connected to the feed shoe 30, and adjusting bolts 33 are arranged on both sides of the feed shoe 30 corresponding to the two adjustable baffle plates. By screwing the adjusting bolts 33, the adjustable baffle plates are pushed to swing, thereby adjusting their positions, so that the materials are centered to prevent deviation. The structure can be specifically referred to the inlet guide device in the belt negative pressure bulk material conveying system disclosed in the Chinese invention patent application with application publication number CN109516146A, and will not be repeated here.

[0080] In the conveying device 100, a rubber baffle plate 32 is provided corresponding to the receiving hopper 3. The rubber baffle plate 32 is specifically arranged in the feed boot 30. The rubber baffle plate 32 is located directly below the receiving hopper 3 to receive the falling material. The rubber baffle plate 32 extends obliquely, and the receiving side of the rubber baffle plate 32 is arranged away from the tail device 102. The rubber baffle plate 32 here can better receive the material falling from the receiving hopper 3. If the material is grain, the damage to the grain can be effectively reduced by using the rubber baffle plate 32. In addition, since the conveying device 100 is arranged obliquely as a whole, in order to prevent the material on the conveying belt from flowing back toward the tail device 102 due to the excessive inclination angle, in this embodiment, the lower end of the rubber baffle plate 32 is arranged close to the conveying belt, leaving a small gap in the middle, and the specific spacing size can be adjusted according to actual needs. In this way, the rubber baffle plate 32 can not only prevent the material from flowing back, but also avoid colliding and damaging the conveying belt when the conveying belt floats.

[0081] In this embodiment, as Figures 1 to 3 shown, a discharging device is provided at the discharging end of the machine head device 103. The discharging device includes a discharging hopper 1. A discharging port is provided at the bottom of the discharging hopper 1, and the discharging port is arranged downward, so that materials can be directly discharged or discharged through a chute pipe.

[0082] The discharging hopper 1 here includes an inner hopper 11 and an outer hopper 12 which are separately arranged. A fixed connection part is provided at the upper part of the inner hopper 11, and it can be integrally or separately connected to the machine head housing of the machine head device 103, so as to install the discharging hopper 1 at the discharging end of the negative pressure bulk material conveying system. The lower part of the inner head is a conical structure with a large upper part and a small lower part. The lower part of the inner hopper 11 is inserted into the outer hopper 12. A material dropping port is provided at the bottom of the inner hopper 11. The inner hopper 11 is used to receive the materials sent out by the conveying belt, and the materials enter the outer hopper 12 through the material dropping port.

[0083] To control the falling speed of the materials, a valve ball 15 is installed outside the inner hopper 11 through an elastic connection structure. The valve ball 15 is used to block the material dropping port. The elastic connection structure here specifically adopts a tension spring 14. A plurality of tension springs 14 are distributed along the circumferential direction of the inner hopper 11. Moreover, the tension springs 14 extend closely along the taper of the inner hopper 11 and are attached to the outer side surface of the inner hopper 11. The upper ends of the tension springs 14 are fixed on the inner hopper 11, and the lower ends are connected to the valve ball 15 to apply an elastic acting force to the valve ball 15 to force the valve ball 15 to move towards the direction of blocking the material dropping port.

[0084] During specific use, tension springs 14 with different elastic coefficients can be selected according to the actual material falling speed requirements. The valve ball 15 is usually selected to be of a stainless steel structure to reduce the influence on the materials.

[0085] The outer hopper 12 here is suspended and assembled under the inner hopper 11 through a swing connection structure 13 in a relatively swingable manner, so that the outer hopper 12 can swing relative to the inner hopper 11 to a vertical position under the action of gravity to ensure vertical material dropping. The swing connection structure 13 here is specifically a hook connection structure. The hook connection structure includes a hook and a hook-matching shaft rod used in cooperation. The hook is arranged on the outer head, and the hook-matching shaft rod is arranged on the inner hopper 11. The hook-matching shaft rod extends horizontally, which is convenient to ensure the swing adjustment of the outer head around the hook-matching shaft rod. The hook-matching shaft rod here mainly functions as a hook-matching part. In other embodiments, the hook-matching part can also be selected as an upper hook. At this time, a lower hook is arranged on the outer head, and the upper hook and the lower hook cooperate to realize the swing connection between the outer hopper 12 and the inner hopper 11.

[0086] Since the outer bucket 12 can be swung to a vertical position, in order to reduce the greater impact of the tilted discharge of the inner bucket 11 on the outer bucket 12, during the design, the discharge port of the inner bucket 11 can be made to maintain a set tilt angle with the axial direction of the inner bucket 11. In this way, when the discharge bucket 1 is installed at the discharge end of the conveying equipment 100, the discharge port of the inner bucket 11 can be made close to horizontal.

[0087] For the outer bucket 12, the outer bucket 12 includes an upper receiving barrel section 121 and a bottom discharge barrel section 122. The receiving barrel section 121 is specifically connected to the inner bucket 11, and is used to receive the material falling from the drop port of the inner bucket 11. The discharge barrel section 122 has a discharge port at the bottom, and the discharge port is arranged downward for discharging materials.

[0088] The discharge barrel section 122 has a conical structure with a radial dimension that is larger at the top and smaller at the bottom. A central material stopper 18 is suspended in the discharge barrel section 122 by a suspension frame 17, and an annular material dropping channel is formed between the central material stopper 18 and the discharge barrel section 122. Due to the obstruction of the central material stopper 18, under the guidance of the annular material dropping channel, the material is likely to form a loose middle and dense outer column structure when falling through the annular material dropping channel. In this way, the air inside the hollow material column and the surrounding air fall with the material, the gas outside the material column replenishes the material column, and the material column shrinks inward, effectively avoiding the problem of material spilling everywhere when falling. At the same time, dust is not easy to leak out.

[0089] An adjusting rod is set at the top of the center stopper body 18, and the center stopper body 18 is installed on the suspension frame 17 so that the height can be adjusted in the up and down directions through the adjusting rod. Specifically, an internal threaded hole is set on the suspension frame 17, and an external threaded section is set on the adjusting rod. The adjusting rod and the internal threaded hole form a screw 16 nut mechanism to adjust the up and down height of the center stopper body 18.

[0090] In this embodiment, a conical transition section is provided on the central material stopper 18 , and the radial dimension of the conical transition section gradually decreases from top to bottom, so that the central material stopper 18 is larger at the top and smaller at the bottom as a whole.

[0091] In such Figure 6 When more than two are used in series, the first negative pressure bulk material conveying system 201 and the second negative pressure bulk material conveying system 202 can be arranged in series, and the discharge hopper 1 of the first negative pressure bulk material conveying system 201 is connected to the chute 203 to drop materials into the receiving port of the second negative pressure bulk material conveying system 202.

[0092] The negative pressure bulk material conveying system provided in this embodiment can be Figure 1 Used alone as shown, or as Figure 6When two or more of the shown ones are used in series, short-distance transportation in grain storage enterprises can be achieved; by adjusting the elevation angle of the negative-pressure bulk material conveying system, stacking and loading can be realized. During the entire production process, the dust emission meets the requirements of the GB16297 Comprehensive Emission Standard for Air Pollutants, thus realizing no dust leakage during the process of grain intake and outtake in a warehouse-type bin, grain outtake from a shallow silo, and loading, meeting the particulate pollutant emission standard, and well solving the dust pollution during the process of grain intake and outtake, loading in a warehouse-type bin, and grain outtake and loading at the bottom of a shallow silo, greatly improving the operating environment of workers.

[0093] Specific Embodiment 2 of the negative-pressure bulk material conveying system provided by the present invention:

[0094] The main difference from Embodiment 1 is that: in Embodiment 1, the sliding bracket on the moving frame is hinged to the moving seat, and the fixed bracket is fixedly assembled with the moving seat. In this embodiment, both the fixed bracket and the sliding bracket are hingedly assembled with the moving seat.

[0095] Specific Embodiment 3 of the negative-pressure bulk material conveying system provided by the present invention:

[0096] The main difference from Embodiment 1 is that: in Embodiment 1, the spacing adjustment structure is specifically a steel cable tensioning structure. In this embodiment, the spacing adjustment structure is a telescopic oil cylinder designed between the fixed bracket and the sliding bracket. To ensure strength, a relatively large number of telescopic oil cylinders can be configured.

[0097] Specific Embodiment 4 of the negative-pressure bulk material conveying system provided by the present invention:

[0098] The main difference from Embodiment 1 is that: in Embodiment 1, the swing connection structure is a hook connection structure. In this embodiment, the swing connection structure is a hinge connection structure, and the hinge connection structure includes a horizontal hinge shaft and a hinge sleeve used in cooperation. One of the horizontal hinge shaft and the hinge sleeve is arranged on the inner hopper, and the other is arranged on the outer hopper.

[0099] Of course, in other embodiments, the swing connection structure can also adopt a tension spring connection structure or a suspension rope connection structure as long as its normal swing is ensured.

[0100] Specific Embodiment 5 of the negative-pressure bulk material conveying system provided by the present invention:

[0101] The main differences from Embodiment 1 are as follows: In Embodiment 1, a valve ball is arranged on the outer side of the inner hopper of the discharging head through an elastic connection structure, and the elastic connection structure specifically uses a tension spring. In this embodiment, a bracket can be arranged below the inner hopper, and the valve ball is guidingly assembled on the bracket. A compression spring is arranged between the bracket and the valve ball. The compression spring extends in the vertical direction and applies an elastic force to the valve ball to force the valve ball to block the material dropping port of the inner hopper. Of course, for the convenience of discharging, a plurality of inclined material dropping channels evenly distributed at intervals in the circumferential direction can be arranged on the bracket. The top end of the inclined material dropping channel corresponds to the material dropping port, and the bottom end is located on the outer peripheral surface of the bracket to guide the material to drop.

[0102] Specific Embodiment 6 of the negative-pressure bulk material conveying system provided by the present invention:

[0103] The main differences from Embodiment 1 are as follows: In Embodiment 1, the material dropping port of the inner hopper maintains a set inclination angle with the axis of the inner hopper. When the discharging hopper is installed at the discharging end of the negative-pressure bulk material conveying system, the material dropping port of the inner hopper can be made close to horizontal. In this embodiment, the material dropping port of the inner hopper can also be arranged perpendicular to the axis of the inner hopper.

[0104] Specific Embodiment 7 of the negative-pressure bulk material conveying system provided by the present invention:

[0105] The main differences from Embodiment 1 are as follows: In Embodiment 1, the negative-pressure bulk material conveying system is mobile. In this embodiment, the negative-pressure bulk material conveying system is fixed, as Figure 7 and Figure 8 shown. The entire negative-pressure bulk material conveying system includes a negative-pressure material receiving bin 41, a hoist 42, and a negative-pressure belt conveyor 43. The negative-pressure material receiving bin 41 as a whole includes a material storage container 411, a steel grating dust-proof plate 412, and a fan 413. The negative-pressure belt conveyor 43 can adopt the conveying equipment structure in the Figure 1 shown negative-pressure bulk material conveying system, and the specific structure will not be elaborated here.

[0106] The above-mentioned negative-pressure material receiving bin 41 is used to temporarily store materials, and the hoist 42 is used to lift and transfer the bulk materials in the negative-pressure material receiving bin to the receiving hopper of the negative-pressure belt conveyor 43. The negative-pressure belt conveyor 43 transports the bulk materials to the negative-pressure discharging device 44 of the head device. The negative-pressure discharging device 44 here includes Figure 2 the discharging hopper shown, and the specific structure will not be elaborated here.

[0107] The negative-pressure discharging device 44 here also includes an inner hopper and an outer hopper. When the negative-pressure belt conveyor is inclined, it can be swing-adjusted. The inclined arrangement here can be specially designed according to the conveying height or can be inclined due to space requirements.

[0108] Of course, for the negative pressure unloading device 44, a corresponding sealing structure can be configured between the inner hopper and the outer hopper of the unloading hopper here. For example, a bellows can be provided to ensure that the inner cavity of the unloading hopper is also a negative pressure cavity. Or the bellows can be omitted, and only the inner cavity of the inner hopper is a negative pressure cavity. Of course, in other embodiments, the unloading hopper can also be directly replaced with a single hopper body. Although it can better achieve the negative pressure effect, it cannot be swing-adjusted and is suitable for the negative pressure belt conveyor for horizontal work.

[0109] An embodiment of the unloading device provided by the present invention has the same structure as the unloading device in Embodiment 1 of the above-mentioned negative pressure bulk material conveying system, and will not be described in detail here.

[0110] In other embodiments, the unloading device can also adopt the unloading device in any one of Embodiments 2 to 6 of the negative pressure bulk material conveying system, which will not be described in detail here either.

[0111] The unloading device provided by the present invention can be applied not only to belt conveyors, but also to scraper conveyors. The negative pressure bulk material conveying system can be used to convey grains and other bulk materials, whether the conveyor is inclined or horizontally arranged.

[0112] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions recorded in the foregoing embodiments without creative labor, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A discharging device, comprising: A discharging hopper, which is used to be installed at the discharging end of a corresponding negative-pressure bulk material conveying system. The bottom of the discharging hopper is provided with a discharge port for discharging materials, and the discharge port is arranged downward. It is characterized in that the discharging hopper comprises an inner hopper and an outer hopper which are separately arranged. A fixed connection part is arranged at the upper part of the inner hopper for fixedly installing at the discharging end of the negative-pressure bulk material conveying system. The lower part of the inner hopper is inserted into the outer hopper, and a blanking port is arranged at the bottom of the inner hopper. The discharge port is arranged at the bottom of the outer hopper. The outer hopper is suspended and assembled under the inner hopper through a swing connection structure so as to be swingable relative to the inner hopper. Thus, under the action of gravity, the outer hopper can swing relative to the inner hopper to a vertical position to ensure vertical material dropping. The swing connection structure is a hinge connection structure or a hooking connection structure. A discharge cylinder section is arranged on the outer hopper, and the bottom of the discharge cylinder section has the discharge port. A central baffle is arranged in the discharge cylinder section, and an annular blanking channel is formed between the central baffle and the discharge cylinder section. A valve ball is installed on the outer side of the inner hopper through an elastic connection structure. The valve ball is used to block the blanking port. The elastic connection structure applies an elastic acting force forcing the valve ball to move towards the direction of blocking the blanking port to the valve ball. The elastic connection structure comprises a tension spring. A plurality of tension springs are distributed along the circumferential direction of the inner hopper. The lower part of the inner hopper is in a conical structure with a larger upper part and a smaller lower part, and the tension springs extend closely along the taper of the inner hopper on the outer side surface of the inner hopper. The blanking port of the inner hopper keeps a set inclination angle with the axis of the inner hopper, so that when the discharging hopper is installed at the discharging end of the negative-pressure bulk material conveying system, the blanking port of the inner hopper is close to horizontal.

2. The discharging device according to claim 1, wherein, The hinge connection structure comprises a horizontally hinged shaft and a hinge sleeve which are used in cooperation. One of the horizontally hinged shaft and the hinge sleeve is arranged on the inner hopper, and the other is arranged on the outer hopper. The hooking connection structure comprises a hook and a hooking cooperation part which are used in cooperation. One of the hook and the hooking cooperation part is arranged on the inner hopper, and the other is arranged on the outer hopper.

3. The discharging device according to claim 1 or 2, characterized in that Both the discharge cylinder section and the central baffle are arranged in a way that the upper part is larger and the lower part is smaller, and the central baffle is installed in the discharge cylinder section with adjustable height in the vertical direction.

4. A negative-pressure bulk material conveying system, comprising: Conveying equipment for conveying materials. The conveying equipment comprises a conveying main body, a head device and a tail device. The conveying main body is arranged between the head device and the tail device, and a discharging device is arranged at the discharging end of the head device. It is characterized in that the discharging device is the discharging device according to any one of claims 1 to 3.

5. The negative-pressure bulk material conveying system according to claim 4, wherein The negative pressure bulk material conveying system is an inclined belt negative pressure bulk material conveying system, the head device is located above the tail device, a conveying belt is arranged inside the conveying body, a receiving hopper is arranged on the conveying body, the receiving hopper is arranged close to the tail device, a rubber baffle plate is arranged corresponding to the receiving hopper in the conveying equipment, the rubber baffle plate is located directly below the receiving hopper to receive the falling material, the rubber baffle plate extends obliquely, and the material receiving side of the rubber baffle plate is arranged away from the tail device, and the lower end of the rubber baffle plate is arranged close to the conveying belt to prevent the material on the conveying belt from flowing back toward the tail device.

6. The negative pressure bulk material conveying system according to claim 4, wherein The negative pressure bulk material conveying system is an inclined negative pressure bulk material conveying system, the head device is located above the tail device, and support wheels are arranged on the conveying equipment near the tail device. The negative pressure bulk material conveying system also includes a moving frame, the moving frame includes a moving seat, and moving wheels are arranged on the moving seat. A fixed bracket and a sliding bracket are arranged on the moving seat. The fixed bracket and the sliding bracket are arranged at intervals along the length direction of the conveying equipment to form an angular support structure with an opening facing upward. The fixed bracket is hingedly assembled with the conveying equipment, and the sliding bracket is assembled with the sliding support of the conveying equipment. At least one of the fixed bracket and the sliding bracket is hingedly assembled with the moving seat, and a spacing adjustment structure is arranged corresponding to the fixed bracket and the sliding bracket for adjusting the distance between the fixed bracket and the sliding bracket, and then the inclination angle of the conveying equipment is adjusted by adjusting the supporting position of the sliding bracket and the conveying equipment.

Images