Material conveying device

Abstract

The utility model discloses a material conveying device which comprises a base. The conveying pipeline is installed on the base, the conveying pipeline is hollow to form a conveying channel, a feeding port is formed in the feeding end of the conveying pipeline, and a discharging port is formed in the discharging end of the conveying pipeline; the conveying pipeline comprises a front-section conveying pipe and a rear-section conveying pipe, and the conveying channel comprises a front-section channel located in the front-section conveying pipe and a rear-section channel located in the rear-section conveying pipe; the feeding hole is communicated with the discharging hole through the rear section channel and the front section channel in sequence; an extrusion disc is arranged at the front end of the discharging opening, and a plurality of material scattering openings which are arranged at intervals are formed in the extrusion disc; a negative pressure opening communicated with the front section channel is formed in the front section conveying pipe. According to the material conveying device, air among materials can be fully discharged, and the loose ratio of the materials can be controlled, so that the materials can be conveniently treated in subsequent procedures.

Description

Technical Field

[0001] The utility model belongs to the field of material conveying, and in particular relates to a material conveying device. Background Art

[0002] In the material processing industry, it is inevitable to transport materials during the processing, packaging or transportation of materials.

[0003] There are many types of existing material conveying devices, among which the spiral material conveying device is very common. The spiral material conveying device uses a motor to drive a spiral propulsion rod to rotate, and the spiral propulsion piece of the spiral propulsion rod pushes the material to the front end for transportation.

[0004] The spiral material conveying device is widely used due to its compact structure, good sealing, and easy maintenance and transportation, especially in the conveying of powder or powder-like materials.

[0005] Normally, there will be a large amount of air between materials. During the material transportation process, the existing material conveying device cannot effectively remove the air in the material and cannot control the looseness ratio of the material, which will affect the material processing in subsequent procedures.

[0006] Similar problems also exist for other types of material conveying devices. Summary of the invention

[0007] The utility model aims to provide a material conveying device, which can fully discharge the air between materials and control the looseness ratio of the materials to facilitate the processing of the materials in subsequent procedures.

[0008] The technical solution is as follows:

[0009] Material conveying device, comprising:

[0010] Pedestal;

[0011] A conveying pipeline, which is installed on the base and is hollow to form a conveying channel. A feed port is provided at the feed end of the conveying pipeline, and a discharge port is provided at the discharge end of the conveying pipeline;

[0012] The delivery pipeline includes a front delivery pipe and a rear delivery pipe, and the delivery channel includes a front channel located in the front delivery pipe and a rear channel located in the rear delivery pipe;

[0013] The feed port is connected to the discharge port through the rear section channel and the front section channel in sequence;

[0014] An extrusion disc is provided at the front end of the discharge port, and a plurality of mutually spaced extrusion parts are provided on the extrusion disc, and a bulk material outlet is formed between two adjacent extrusion parts;

[0015] The front section delivery pipe is provided with a negative pressure port which is communicated with the front section channel.

[0016] In one of the embodiments, a plurality of mutually spaced extrusion parts are provided on the extrusion disk, and the bulk material opening is formed between two adjacent extrusion parts.

[0017] In one embodiment, the multiple extrusion portions are symmetrically distributed along the center of the extrusion disk, or the multiple extrusion portions are evenly distributed circumferentially along the center of the extrusion disk; the multiple extrusion portions are connected at the center of the extrusion disk to form a central connecting piece, and a central hole is provided in the middle of the central connecting piece.

[0018] In one embodiment, the width of the extruded portion projected in the axial direction is 5 mm to 15 mm.

[0019] In one embodiment, the maximum radial dimension of the bulk material opening of the extrusion disk is D1.

[0020] At the connection between the extrusion disk and the front section delivery pipe, the maximum radial dimension of the front section channel is D2.

[0021] The difference between D1 and D2 is less than 20 mm.

[0022] In one embodiment, the ratio of the area of ​​the bulk material opening to the area of ​​the projection of the extrusion disk in the front section channel along the axial direction of the front section conveying pipe where the extrusion disk is connected is the penetration ratio;

[0023] At the lower part of the extrusion disk D1 / 10, the penetration ratio of the area within the circumferential range of 60 degrees is greater than the penetration ratio of the area within the radial range of D1 of the extrusion disk.

[0024] In one embodiment, the ratio of the area of ​​the bulk material opening to the area of ​​the projection of the extrusion disk in the front section channel along the axial direction of the front section conveying pipe where the extrusion disk is connected is the penetration ratio;

[0025] In the channel cross section of the front section conveying pipe, the penetration ratio of the extrusion disk is 60% to 75%.

[0026] In one embodiment, the width of the extruded portion is 8 mm to 12 mm.

[0027] In one of the embodiments, the front section conveying pipe includes an inner sleeve and an outer sleeve, the outer sleeve is sleeved on the radially outer side of the inner sleeve, and the front section channel is located on the inner wall of the inner sleeve; the two ends of the inner sleeve and the outer sleeve are closed to form a sandwich between the inner sleeve and the outer sleeve, a cylindrical filter screen is arranged in the sandwich, and a vent is arranged on the inner sleeve; the negative pressure port is arranged on the outer sleeve; the front section channel is communicated with the negative pressure port through the vent and the sandwich in sequence.

[0028] In one embodiment, an air blowing port is provided on the outer sleeve, and the air blowing port faces the filter screen; and there are at least two air blowing ports distributed along the circumference of the outer sleeve; and there are at least two negative pressure ports distributed along the circumference of the outer sleeve.

[0029] In one of the embodiments, it also includes a material control mechanism and a vertical material discharge pipe, and the two opposite sides of the material discharge pipe are respectively provided with a first mounting port and a second mounting port; the discharge port is connected to the first mounting port through an extrusion disk; the material control mechanism is installed on the second mounting port, and the material control mechanism has an operating end, which extends into the second mounting port and faces the extrusion disk; the radial dimension of the operating end is smaller than the inner diameter of the second mounting port; a slide rail is provided on the base, and the rear end of the material control mechanism is slidably provided on the slide rail.

[0030] In one of the embodiments, a first connecting flange is provided at the front end of the front section conveying pipe, and a second connecting flange is provided at the first mounting port; the outer edges of the first connecting flange, the second connecting flange and the extrusion disk are all provided with connecting holes, and the first connecting flange, the extrusion disk and the second connecting flange are connected after the connecting part passes through the connecting holes of the first connecting flange, the extrusion disk and the second connecting flange.

[0031] In one embodiment, the operating end includes a pusher claw and a blocking disk, and the number of the pusher claws is at least two and they are located at the front end of the blocking disk; the outer edge of the blocking disk matches the inner diameter of the first mounting opening.

[0032] In one embodiment, the cross-section of the conveying pipe is circular, and a spiral propulsion rod is arranged in the conveying channel along the longitudinal direction of the conveying pipe, a spiral propulsion sheet is arranged on the spiral propulsion rod, and the spiral propulsion rod is connected to the driving mechanism.

[0033] In one embodiment, the radial outer side of the squeeze disk forms an outer ring plate.

[0034] The technical solution provided by the utility model has the following advantages and effects:

[0035] During the material conveying process, the material enters the rear conveying pipe through the feed port and is conveyed to the front conveying pipe. After the material enters the front conveying pipe, the negative pressure port vacuums the front channel in the front conveying pipe and forms a certain negative pressure in the front channel to remove part of the air between the materials. When the material is conveyed to the discharge port, due to the blocking effect of the extrusion disk, the material will be squeezed to a certain extent in the front channel, making the material more compact and further removing the air between the materials.

[0036] After adopting the material conveying device of the utility model, the air in the material can be fully discharged, and the looseness ratio of the conveyed material can be controlled, so as to facilitate the processing of the material in the subsequent procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is an exploded view of the material conveying device in an embodiment of the utility model;

[0038] Figure 2 yes Figure 1 A partial enlarged view of

[0039] Figure 3 It is a partial cross-sectional view of the material conveying device in an embodiment of the utility model;

[0040] Figure 4 yes Figure 3 A partial enlarged view of

[0041] Figure 5 This is a structural diagram of a first type of extrusion disk in an embodiment of the utility model;

[0042] Figure 6 yes Figure 5 a front view of the squeeze disk;

[0043] Figure 7 It is a schematic diagram of the penetration ratio of the lower part of the first extrusion disk in the embodiment of the utility model;

[0044] Figure 8 This is a structural diagram of a second type of extrusion disk in an embodiment of the utility model;

[0045] Fig. 9 yes Figure 8 a front view of the squeeze disk;

[0046] Fig.10 It is a schematic diagram of the penetration ratio of the lower part of the first extrusion disk in the embodiment of the utility model;

[0047] Fig.11 This is a structural diagram of a third type of extrusion disk in an embodiment of the utility model;

[0048] Fig.12yes Fig.11 a front view of the squeeze disk;

[0049] Fig.13 It is a schematic diagram of the penetration ratio of the lower part of the third extrusion disk in the embodiment of the utility model;

[0050] Description of reference numerals:

[0051] 20. Conveying pipeline, 21. Front conveying pipe, 211. Discharge port, 212. Front channel, 213. Inner sleeve, 214. Outer sleeve, 215. Interlayer, 216. Filter, 217. Negative pressure port, 218. Air blowing port,

[0052] 22. rear conveying pipe, 221. feed port, 222. rear channel, 241. spiral propulsion rod, 242. spiral propulsion sheet, 243. first driving mechanism,

[0053] 30. Extrusion plate, 31. Extrusion part, 32. Bulk material outlet, 33. Center connecting piece, 331. Center hole, 34. Outer ring plate,

[0054] 40. Feeding pipe, 41. First mounting port, 42. Second mounting port, 43. First connecting flange, 44. Second connecting flange, 45. Third connecting flange, 461. Connecting hole, 462. Connecting piece, 47. On-off valve, 48. Third driving mechanism,

[0055] 51. material control box, 52. slide rail, 53. operating end, 531. push claw, 532. blocking plate, 55. center rod. DETAILED DESCRIPTION

[0056] In order to facilitate the understanding of the present invention, the specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0057] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0058] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] It should be noted that, in this document, “fixed to” or “connected to” may mean directly fixing or connecting to an element, or indirectly fixing or connecting to an element.

[0060] like Figures 1 to 7 As shown,

[0061] Material conveying device, comprising:

[0062] A material control mechanism and a vertical material discharge pipe 40;

[0063] Pedestal;

[0064] A conveying pipeline 20, which is installed on the base and is hollow to form a conveying channel. A feed port 221 is provided at the feed end of the conveying pipeline 20, and a discharge port 211 is provided at the discharge end of the conveying pipeline 20;

[0065] The delivery pipeline 20 includes a front delivery pipe 21 and a rear delivery pipe 22, and the delivery channel includes a front channel 212 located in the front delivery pipe 21 and a rear channel 222 located in the rear delivery pipe 22;

[0066] The feed port 221 is connected to the discharge port 211 through the rear channel 222 and the front channel 212 in sequence;

[0067] A squeeze plate 30 is provided at the front end of the discharge port 211, and a plurality of mutually spaced bulk material ports 32 are provided on the squeeze plate 30;

[0068] The front section delivery pipe 21 is provided with a negative pressure port 217 communicating with the front section channel 212 .

[0069] In this embodiment, the base is not shown, and it can be an integral mounting rack, or multiple relatively independent mounting racks, or a mounting ground, or a partial mounting ground or mounting rack. Its function is to support or fix the delivery pipeline 20 or other components.

[0070] The material conveying device described in this embodiment can be used to convey cadmium oxide powder so that the cadmium oxide powder can be packaged in a subsequent process.

[0071] In this embodiment, when the material is transported, the material enters the rear conveying pipe 22 through the feed port 221, and the material is transported to the front conveying pipe 21. After the material enters the front conveying pipe 21, the negative pressure port 217 vacuums the front channel 212 in the front conveying pipe 21, and forms a certain negative pressure in the front channel 212 to remove part of the air between the materials. When the material is transported to the discharge port 211, due to the blocking effect of the extrusion disk 30, the material will form a certain extrusion in the front channel 212, making the material more compact, and further removing the air between the materials. After adopting the material conveying device described in this embodiment, the air in the material can be fully removed. The original powdered cadmium oxide is discharged from the bulk material port 32 of the extrusion disk 30 after being compacted by the extrusion disk 30, and forms small blocks, which can control the bulk ratio of the transported material. The cadmium oxide after compaction by the extrusion disk 30 is more compact, which is conducive to the subsequent packaging of the material and avoids the explosion of the bag due to the expansion of the air in the material.

[0072] The cross section of the conveying pipe 20 is circular, and a spiral propulsion rod 241 is arranged in the conveying channel along the longitudinal direction of the conveying pipe 20, and a spiral propulsion piece 242 is arranged on the spiral propulsion rod 241, and the spiral propulsion rod 241 is connected to a first driving mechanism 243 (i.e., a driving motor). This embodiment adopts a spiral conveying device with a compact structure, which is suitable for conveying powdered materials. The spiral propulsion piece 242 cooperates with the inner wall of the conveying pipe 20, and when there is powdered material in the conveying pipe 20, the sealing performance inside the conveying channel is better.

[0073] The front section conveying pipe 21 includes an inner sleeve 213 and an outer sleeve 214, the outer sleeve 214 is sleeved on the radial outer side of the inner sleeve 213, and the front section channel 212 is located on the inner wall of the inner sleeve 213; the two ends of the inner sleeve 213 and the outer sleeve 214 are closed to form an interlayer 215 between the inner sleeve 213 and the outer sleeve 214, a cylindrical filter screen 216 is arranged in the interlayer 215, and a vent hole (not shown in the figure) is arranged on the inner sleeve 213; the negative pressure port 217 is arranged on the outer sleeve 214; the front section channel 212 is connected to the negative pressure port 217 through the vent hole and the interlayer 215 in sequence. Since the front section conveying pipe 21 needs to be externally connected to the negative pressure port 217 for vacuum extraction, the front section conveying pipe 21 adopts a double-layer sleeve structure formed by an inner sleeve 213 and an outer sleeve 214. Firstly, the filter screen 216 can be conveniently set to prevent excessive powdered materials from entering the negative pressure port 217 and causing blockage. Secondly, the double-layer sleeve structure can make the negative pressure evenly distributed around the front section conveying pipe 21, thereby improving the vacuum extraction effect. Thirdly, the double-layer sleeve structure has a larger space, and under certain circumstances, the powdered materials entering the interlayer 215 can also be stored to reduce the blockage of the negative pressure port 217.

[0074] The outer sleeve 214 is provided with an air blowing port 218, which faces the filter screen 216. There are multiple air blowing ports 218, which are distributed along the circumference of the outer sleeve 214. There are also multiple negative pressure ports 217, which are distributed along the circumference of the outer sleeve 214. The filter screen 216 can be blown through the air blowing port 218 (for example, high-speed air blowing or pulse air blowing is performed on the filter screen 216), and the powdery materials accumulated on the filter screen 216 can be back-blown to avoid clogging of the filter screen 216 and extend the service life.

[0075] A first mounting port 41 and a second mounting port 42 are respectively provided on two opposite sides of the discharge pipe 40; a first connecting flange 43 is provided at the front end of the front section conveying pipe 21, and a second connecting flange 44 is provided at the first mounting port 41; the outer edges of the first connecting flange 43, the second connecting flange 44 and the extrusion plate 30 are all provided with connecting holes 461, and the first connecting flange 43, the extrusion plate 30 and the second connecting flange 44 are connected after the connecting piece 462 (i.e., the connecting bolt) passes through the connecting hole 461 of the first connecting flange 43, the extrusion plate 30 and the second connecting flange 44; a third connecting flange 45 is provided at the second mounting port 42, and the material control mechanism is installed on the third connecting flange 45 of the second mounting port 42 through the connecting piece 462 (i.e., the connecting bolt). A shutoff valve 47 is provided on the discharge pipe 40, and the shutoff valve 47 is driven to rotate by the third driving mechanism 48 to control the connection or disconnection of the discharge pipe 40. When the shutoff valve 47 is opened, the material can flow through the discharge pipe 40, and when the shutoff valve 47 is disconnected, the material cannot pass through the discharge pipe 40.

[0076] The first connecting flange 43 and the second connecting flange 44 are connected by a connecting piece 462, and the extrusion plate 30 is fixed at the position of the first mounting port 41. After removing the connecting piece 462, the conveying pipeline 20, especially the front section conveying pipe 21, can be conveniently maintained, and the extrusion plate 30 can also be conveniently replaced.

[0077] The material control mechanism has an operating end 53, which extends into the second mounting opening 42 and faces the extrusion disk 30; the radial dimension of the operating end 53 is smaller than the inner diameter of the second mounting opening 42; a slide rail 52 is arranged on the base, and the rear end of the material control mechanism has a material control box 51, and a second driving mechanism (not shown in the figure) is arranged in the material control box 51, and the material control box 51 is slidably arranged on the slide rail 52. The operating end 53 includes a pusher claw 531 and a blocking disk 532, and the pusher claw 531 is at least two and is located at the front end of the blocking disk 532; the center of the blocking disk 532 and the plurality of pusher claws 531 is connected to the second driving mechanism in the material control box 51 through a center rod 55, and the operating end 53 is driven to rotate by the second driving mechanism. The outer edge of the blocking disk 532 matches the inner diameter of the first mounting opening 41.

[0078] The material discharged from the discharge port 211 is discharged through the discharge pipe 40. In order to facilitate the precise control of the discharge of the material at the discharge port 211, the second driving mechanism can drive the finger 531 of the operating end 53 to push the material at the discharge port 211 to prevent the material from blocking the bulk material port 32. The operating end 53 of the material control mechanism continues to move forward, and the blocking plate 532 can block the discharge port 211. In order to facilitate the maintenance of the material control mechanism, at this time, the connection between the material control mechanism and the second installation port 42 can be disconnected (i.e., the connecting flange is loosened), and the material control mechanism is moved backward as a whole along the direction of the slide rail 52 to make the operating end 53 disengage from the second installation port 42, so that maintenance can be conveniently performed.

[0079] After setting the extrusion plate 30, first, we need to consider the extrusion plate extruding the material to allow the material to be fully exhausted; secondly, we also need to avoid clogging by the material here; thirdly, we also need to consider the dispersion effect of the extrusion plate on the material, and we need to fully consider the specific structural design of the extrusion plate 30.

[0080] The first shape of the squeeze disk 30 is as follows Figure 5 , Figure 6 and Figure 7 As shown, a plurality of mutually spaced extrusion parts 31 are provided on the extrusion disk 30, and the plurality of extrusion parts 31 are evenly distributed in the circumferential direction along the center of the extrusion disk 30. Specifically, the extrusion part 31 is in a "cross" shape, and an outer annular extrusion part 31 is connected to the "cross"-shaped extrusion part 31. The "cross"-shaped extrusion parts 31 are connected in the center of the extrusion disk 30 to form a central connecting piece 33. A central hole 331 is provided in the middle of the central connecting piece 33, and the bulk material opening 32 is formed between two adjacent extrusion parts 31. In this embodiment, the extrusion part 31 is in a strip shape, and its width L projected in the axial direction is 5 mm to 15 mm. Preferably, the width L of the extrusion part 31 is 8 mm to 12 mm (in this embodiment, the width L of the extrusion part 31 is 10 mm), and an outer ring plate 34 is formed on the radial outer side of the extrusion disk 30.

[0081] The outer ring plate 34 of the extrusion disk 30 can improve its overall strength and avoid extrusion fracture or deformation. The extrusion portion 31 can perform a certain extrusion effect. Reasonable design of the width of the extrusion portion 31 can avoid material blockage here and ensure the strength of the extrusion portion 31.

[0082] The second shape of the squeeze disk 30 is as follows Figure 8 , Fig. 9 and Fig.10As shown, the extrusion portion 31 is three circular rings evenly distributed in the circumferential direction, and the three circular rings are connected at the center of the extrusion disk 30 to form a central connecting piece 33, and a central hole 331 is provided in the middle of the central connecting piece 33. The shape of the extrusion disk 30 is slightly different, but the principle is the same, which will not be repeated here.

[0083] The third shape of the squeeze disk 30 is as follows Fig.11 , Fig.12 and Fig.13 As shown, the extrusion portion 31 is in a "cross" shape, and the "cross"-shaped extrusion portions 31 are connected at the center of the extrusion disk 30 to form a central connecting piece 33. A central hole 331 is provided in the middle of the central connecting piece 33, and two annular extrusion portions 31 are provided between the central connecting piece 33 and the outer ring plate 34. In this embodiment, the plurality of extrusion portions 31 are symmetrically distributed along the center of the extrusion disk 30. The shape of the extrusion disk 30 is slightly different, but the principle is the same, which will not be described here.

[0084] After adopting the material conveying device described in this embodiment, the bulk ratio of the output material can be controlled in the range of 8.2kg / L to 8.7kg / L, which is very beneficial for the subsequent packaging of the material.

[0085] The setting of the extrusion disk 30 needs to have both conveying efficiency and degassing effect. If the area of ​​the bulk port 32 is too large, it will affect the degassing effect. If the area of ​​the bulk port 32 is too small, it will cause blockage to a certain extent, and will also affect the conveying efficiency and the service life of the equipment. In addition, the function of the extrusion disk 30 is not only to cooperate with the negative pressure port to enhance the degassing effect, but the bulk ports 32 evenly spaced on the extrusion disk 30 also have the function of dispersing materials. In this embodiment, the area of ​​the bulk port 32, projected along the axial direction of the front section conveying pipe at the connection of the extrusion disk 30, accounts for 60% to 75% (preferably 65% ​​to 70%) of the channel cross-sectional area of ​​the front section conveying pipe. It should be noted that the aforementioned area is the effective projection area. When the maximum radial dimension of the bulk port 32 is inconsistent with the inner diameter of the front section conveying pipe, its effective projection area will change accordingly.

[0086] If the bulk material opening 32 is not arranged at uniform intervals, although the conveying efficiency can be ensured, the material in blocks cannot be broken up, and the uniform interval arrangement can properly disperse the material. It should be noted that the "uniform arrangement" mentioned here can be: multiple extrusion parts 31 are uniformly distributed circumferentially along the center of the extrusion disk 30, or multiple extrusion parts 31 are symmetrically distributed along the center of the extrusion disk 30, or other uniform arrangement methods. It can be understood that the uniform arrangement does not require absolute uniformity, and also allows the bulk material opening 32 to have processing errors.

[0087] The maximum radial dimension of the bulk material opening 32 of the extrusion plate 30 is D1. At the connection between the extrusion plate 30 and the front conveying pipe, the maximum radial dimension of the front passage is D2. The difference between D1 and D2 is less than 20 mm. This structure can reduce the obstruction of the material at the maximum radial edge of the bulk material opening 32 and reduce the accumulation of the material at the edge of the extrusion plate 30. The difference between D1 and D2 should be as small as possible. This structure includes the following three cases:

[0088] 1. If D1 is large, the front end of the front section conveying pipe is exposed, which also affects the strength of the extrusion plate 30;

[0089] 2. If D2 is larger, the strength requirement of the extrusion disk 30 can be reduced, but the maximum radial edge of the front channel will be blocked by the extrusion disk 30;

[0090] 3. D1 is substantially equal to D2, that is, the maximum radial position of the bulk material opening 32 of the extrusion disk 30 is substantially flush with the front end inner wall of the front section conveying pipe.

[0091] In this embodiment, the third structure is adopted.

[0092] Due to the gravity of the material, the lower area of ​​the extrusion plate 30 will bear more pressure. In order to reduce the accumulation of materials and avoid clogging, the extrusion portion 31 of the extrusion plate 30 should be as far away from the lowest position of the front passage as possible.

[0093] The ratio of the area of ​​the bulk material port 32 to the area of ​​the projection of the extrusion disc 30 in the front section of the conveying pipe along the axial direction of the connection of the extrusion disc 30 in the front section of the channel 212 is the penetration ratio; the penetration ratio of the area in the circumferential 60 degree range at the lower part of the extrusion disc 30 at D1 / 10 is greater than the penetration ratio of the area in the radial range of D1 of the extrusion disc 30. The penetration ratios of the three lower areas of the extrusion disc 30 are as follows: Figure 7 , Fig.10 and Fig.13 As shown in FIG. 1 , the lower area of ​​the extrusion plate 30 is subjected to relatively high pressure of the material, so this area needs to be paid special attention to. Figure 7 , Fig.10 and Fig.13 In the figure, the selected area is the lower part of D1 / 10 of the extrusion disk 30, along the circumferential range of 60 degrees, that is, the area shown by the shaded area in the figure. It can be seen from the figure that the penetration ratio in this area is relatively large. It can be understood that the purpose of selecting the area shown is to illustrate the penetration ratio of the lower area of ​​the extrusion disk 30, and it is not required to be strictly limited to the range of "the lower part of D1 / 10, along the circumferential range of 60 degrees"; at the same time, it is also necessary to explain that: D1 is the maximum radial dimension of the bulk material opening 32 of the extrusion disk 30, not the overall radial dimension of the extrusion disk 30.

[0094] In this embodiment, Figure 7 The penetration ratio of the lower area of ​​the extrusion disk 30 (i.e., the shaded area) is shown as: 100%; Fig.10 The penetration ratio of the lower area of ​​the extrusion disk 30 (i.e., the shaded area) is: 92%; Fig.13 The penetration ratio of the lower area of ​​the extrusion disk 30 (i.e., the shaded area) is 85.5%. Figure 7 , Fig.10 and Fig.13 The extrusion disk shown in the figure is installed at the angle shown in the figure, and the penetration ratio of the lower area of ​​the extrusion disk 30 is greater than the average penetration ratio of the extrusion disk (60% to 75%).

[0095] The installation angles of the three types of squeeze discs 30 are as follows: Figure 7 , Fig.10 and Fig.13 As shown, if the installation position of the extrusion disk 30 is rotated, the extrusion and dispersion effects of the extrusion disk 30 on the material will be affected.

[0096] It should be noted that:

[0097] 1. The material conveying device described in this embodiment is not limited to conveying cadmium oxide powder materials, but can also be used to convey other powder materials.

[0098] 2. In the above description, "front" refers to the conveying direction of the material, but for the material control mechanism, "front" and "rear" refer to the opposite. It should be made clear that in any case, front and rear are only relative position concepts and do not constitute a limitation on the structure described in this embodiment.

[0099] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A material conveying device, characterized in that: include: Pedestal; A conveying pipeline, which is installed on the base and is hollow to form a conveying channel. A feed port is provided at the feed end of the conveying pipeline, and a discharge port is provided at the discharge end of the conveying pipeline; The delivery pipeline includes a front delivery pipe and a rear delivery pipe, and the delivery channel includes a front channel located in the front delivery pipe and a rear channel located in the rear delivery pipe; The feed port is connected to the discharge port through the rear section channel and the front section channel in sequence; An extrusion disc is provided at the front end of the discharge port, and a plurality of mutually spaced extrusion parts are provided on the extrusion disc, and a bulk material outlet is formed between two adjacent extrusion parts; The front section delivery pipe is provided with a negative pressure port which is communicated with the front section channel.

2. The material conveying device according to claim 1, characterized in that: The plurality of extrusion portions are symmetrically distributed along the center of the extrusion disk, or the plurality of extrusion portions are evenly distributed circumferentially along the center of the extrusion disk; A plurality of the extrusion parts are connected at the center of the extrusion disk to form a central connecting piece, and a central hole is arranged in the middle of the central connecting piece.

3. The material conveying device according to claim 1, characterized in that: The width of the extruded portion projected in the axial direction is 5 mm to 15 mm.

4. The material conveying device according to any one of claims 1 to 3, characterized in that: The maximum radial dimension of the bulk material opening of the extrusion disk is D1. At the connection between the extrusion disk and the front section delivery pipe, the maximum radial dimension of the front section channel is D2. The difference between D1 and D2 is less than 20 mm.

5. The material conveying device according to claim 4, characterized in that: The ratio of the area of ​​the bulk material opening to the area of ​​the projection of the extrusion disk in the front section of the channel along the axial direction of the front section of the conveying pipe where the extrusion disk is connected is the penetration ratio; At the lower part of the extrusion disk D1 / 10, the penetration ratio of the area within the circumferential range of 60 degrees is greater than the penetration ratio of the area within the radial range of D1 of the extrusion disk.

6. The material conveying device according to any one of claims 1 to 3, characterized in that: The ratio of the area of ​​the bulk material opening to the area of ​​the projection of the extrusion disk in the front section of the channel along the axial direction of the front section of the conveying pipe where the extrusion disk is connected is the penetration ratio; In the channel cross section of the front section conveying pipe, the penetration ratio of the extrusion disk is 60% to 75%.

7. The material conveying device according to any one of claims 1 to 3, characterized in that: The front section delivery pipe comprises an inner sleeve and an outer sleeve, the outer sleeve is sleeved on the radial outer side of the inner sleeve, and the front section channel is located on the inner wall of the inner sleeve; The two ends of the inner sleeve and the outer sleeve are closed to form an interlayer between the inner sleeve and the outer sleeve, a cylindrical filter screen is arranged in the interlayer, and a vent hole is arranged on the inner sleeve; The negative pressure port is arranged on the outer sleeve; The front section channel is communicated with the negative pressure port through the vent hole and the interlayer in sequence.

8. The material conveying device according to claim 7, characterized in that: An air blowing port is provided on the outer sleeve, and the air blowing port faces the filter screen; There are at least two blowing ports, which are distributed along the circumference of the outer sleeve; There are at least two negative pressure ports, which are distributed along the circumference of the outer sleeve.

9. The material conveying device according to any one of claims 1 to 3, characterized in that: It also includes a material control mechanism and a vertical material discharge pipe, and two opposite sides of the material discharge pipe are respectively provided with a first installation opening and a second installation opening; The discharge port is connected to the first mounting port via an extrusion disk; The material control mechanism is installed on the second installation opening, and the material control mechanism has an operating end, which extends into the second installation opening and faces the extrusion disk; The radial dimension of the operating end is smaller than the inner diameter of the second mounting opening; A slide rail is arranged on the base, and the rear end of the material control mechanism is slidably arranged on the slide rail.

10. The material conveying device according to claim 9, characterized in that: A first connecting flange is provided at the front end of the front section delivery pipe, and a second connecting flange is provided at the first installation opening; The outer edges of the first connecting flange, the second connecting flange and the extrusion disk are all provided with connecting holes. After the connecting piece passes through the connecting holes of the first connecting flange, the extrusion disk and the second connecting flange, the first connecting flange, the extrusion disk and the second connecting flange are connected.

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