Viscous powder fluidization continuous feeding device

Abstract

The invention relates to a viscous powder fluidization continuous feeding device which is characterized in that a spiral groove formed by two adjacent spiral blades on a spiral shaft and the spiral shaft is mainly arranged, the axial section of the spiral groove is rectangular, trapezoidal or semicircular, the spiral groove is far away from the direction of the spiral shaft, and the length of an upper opening of the spiral groove is larger than that of the bottom of the spiral groove; the feed opening of the feed bin is connected with the outer shell of the spiral feeder, so that the spiral shaft of the spiral feeder penetrates through the interior of the feed opening of the feed bin, and the materials can be prevented from arching and accumulating at the discharge opening of the feed bin through the cooperative arrangement of the axial section of the spiral groove and the interior of the feed opening of the spiral shaft penetrating through the interior of the feed opening of the feed bin; the feeding device has the advantages of being capable of avoiding the locking phenomenon of the spiral shaft, simple in structure, small in investment and the like, can be used for feeding industrial superfine powder or viscous powder, and is particularly used for the field of fluidization feeding of the superfine powder or the viscous powder.

Description

TECHNICAL FIELD

[0001] The present application relates to a feeding device for conveying solid materials, in particular to a continuous feeding device for fluidizing viscous powders. BACKGROUND

[0002] Particle fluidization technology has the characteristics of fast mass and heat transfer and uniform gas-solid reaction, and is widely used in traditional and emerging industries such as coal chemical industry, petroleum chemical industry, steel metallurgy, biological medicine, and nanometer material preparation, and has become an important means of gas-solid reaction and material synthesis. In theory, the reduction of particle size is beneficial to shorten the time required for complete conversion of particles and improve production efficiency. However, when the particle size is reduced to less than 10 μm, the powder is easy to agglomerate and the flowability is poor. When using existing silos and screw feeders for feeding, problems such as arching of powder in the silo, blockage of screw groove, and seizure of screw feeder often occur, resulting in interruption of feeding.

[0003] The existing silos are mostly conical structures with a wide top and a narrow bottom, which are suitable for powders with good flowability. However, when used for ultra-fine powders with strong viscosity, problems such as arching and accumulation of powder in the silo, poor discharge, etc. are easy to occur. In order to solve the above problems, some existing published patent technologies have improved the structure of the silo, including inverted cone structure with a narrow top and a wide bottom (e.g. CN 201901414 U), increasing the silo opening (e.g. CN 207451144 U) and double-layer silo design (e.g. CN 215324606 U) and other ways, some set up silo wall vibrator (e.g. CN 114538142A, CN 205020213 U, CN 108750710 B, etc.), some set up pneumatic arch breaking mechanism (e.g. CN 114291537 A, CN 216836145 U, CN 112978293 A, CN 112027672 A, etc.), some set up stirring device (e.g. CN 110510275 A, CN 109422108 A, CN 114073902 A, CN 1137045C, CN 209507126 U, CN 207844313 U, CN 209507134 U, etc.).

[0004] For example, CN 114538142A discloses a superfine powder quantitative feeding device, which comprises first, second and third hoppers connected in sequence from top to bottom, and a vibrating powder feeding mechanism connected between the first and second hoppers, a vibrating screening mechanism arranged in the second hopper, and a first vibrating device connected to the third hopper. By setting the vibrating powder feeding mechanism, the vibrating screening mechanism, the weight monitor and the first vibrating device, the powder agglomeration and caking are prevented, and the phenomenon of bridging and powder blocking is effectively prevented. CN 114291537A discloses a large-scale hopper anti-blocking feeding equipment, which comprises a hopper body arranged on a mounting frame, a lower hopper transition section below the hopper body, and a belt feeder below the transition section. The hopper body is provided with a hopper wall vibrator. During feeding, the belt feeder is arranged in a double inclined manner to reduce the possibility of high-viscosity material blocking the hopper funnel. A plurality of airflow unblocking devices are arranged on the outer wall of the hopper to perform pneumatic arch breaking and flow assisting. CN 114073902A discloses a superfine powder feeding device, which comprises a synchronous wheel arranged in the hopper body to drive the paddle to rotate, thereby mixing the powder in the hopper body with gas to enhance the flowability of the solid and break the agglomeration and bridging of the powder. However, the above-mentioned devices are very complex and difficult to control.

[0005] In order to cooperate with the hopper discharge, a screw feeder is usually arranged below the hopper discharge port to realize quantitative conveying of the material. However, when applied to conveying superfine powder, the powder is extremely easy to adhere to the screw shaft due to its strong viscosity, which causes intermittent discharge during feeding, and even causes the screw shaft to be locked in severe cases, seriously affecting the continuous operation.

[0006] For example, CN 111216933A discloses a variable-diameter and variable-pitch screw feeder, which comprises a motor support, a drive reduction motor, a conveying barrel, a hopper screw conveying shaft and variable-diameter and variable-pitch screw conveying blades. The screw conveying shaft is arranged in the conveying barrel, the hopper is open at the top, the bottom of the hopper is fixedly connected to the left side upper side of the conveying barrel, the right side lower side of the conveying barrel is provided with a discharge port, the variable-diameter and variable-pitch screw conveying blades are fixedly installed on the outer circumference of the screw conveying shaft, the upper side of the conveying hopper is provided with an air extraction shell between the hopper and the right side end cover, and a negative pressure cavity is formed between the inner circumference of the air extraction shell and the upper side outer circumference of the conveying barrel. The purpose is to degas through the air extraction of the micro-negative pressure fan and to reduce dust flying. However, the key technical problem to be solved by this device is the low feeding efficiency, poor degassing effect and low screw feeding precision of the superfine powder at the present stage.

[0007] CN 102616537A discloses a superfine powder conveying and dosing device, which comprises a motor, an inlet, an outlet, a shell and a screw conveying device. The screw conveying device comprises left and right screw conveying devices fixed in parallel in the shell. The purpose is to solve the problem that the existing single screw conveyor cannot realize multi-point feeding and multi-point discharging conveying and dosing.

[0008] CN 2481673 Y discloses a quantitative discharging machine, which is characterized in that a stirring blade is arranged on the stirring shaft of a two-way screw auger, and a notch is arranged on the screw blade for crushing the agglomerated material. However, the arrangement mode of the groove between the screw blades is not described, and the sticky powder is easily attached to the bottom of the screw groove, thereby causing the problems of poor discharging and inaccurate quantification.

[0009] The above existing patent technologies are single structure design modes for the silo or the screw feeder, and the silo and the screw feeder are not regarded as a unified whole. Therefore, it is difficult to realize the normal continuous conveying of the superfine powder.

[0010] Therefore, the application provides an integrated sticky powder feeding device, which can realize the normal continuous feeding of the superfine powder. SUMMARY

[0011] In view of the problems in the prior art, the application provides a sticky powder fluidization continuous feeding device, which has the advantages of simple structure, small investment, and the like, and can be used for the feeding of the superfine powder or the sticky powder in industry, and in particular, the field of fluidization feeding of the superfine powder or the sticky powder.

[0012] To achieve the above purpose, the application adopts the following technical scheme:

[0013] The application aims to provide a sticky powder fluidization continuous feeding device, which comprises a silo, a screw feeder, a motor and a supporting base; the silo, the screw feeder and the motor are independently fixed through the supporting base; the screw feeder comprises a screw shaft and an external shell arranged coaxially; the screw shaft is fixedly connected with the rotating shaft of the motor;

[0014] The screw shaft forms a screw groove with the adjacent two screw blades, and the axial section of the screw groove is a rectangle, a trapezoid or a semicircle; the upper opening length of the screw groove is greater than the bottom length in the direction away from the screw shaft;

[0015] The silo discharge port of the silo is connected with the external shell of the screw feeder, so that the screw shaft of the screw feeder penetrates the inside of the silo discharge port.

[0016] The viscous powder fluidization continuous feeding device provided by the application is used for solving the problems of small particle size and high viscosity of viscous powder, and has the following advantages: the spiral groove formed by the adjacent two spiral blades and the spiral shaft is provided on the spiral shaft, the axial section of the spiral groove is rectangular, trapezoidal or semicircular, the upper opening length of the spiral groove is greater than the bottom length in the direction away from the spiral shaft, the viscous powder cannot be blocked in the direction perpendicular to the spiral shaft, and the problem of agglomeration of the viscous powder in the spiral groove can be avoided, and the phenomenon of spiral shaft seizure can be avoided; the discharge port of the bin is connected with the external shell of the screw feeder, the spiral shaft of the screw feeder penetrates into the internal part of the discharge port of the bin, the viscous powder from the discharge port of the bin can be directly pushed to the downstream by the spiral shaft, and the problem of arching of the material at the discharge port of the bin can be avoided.

[0017] As a preferred technical scheme of the application, the bin comprises a top cover, a cylindrical section, a conical section and the discharge port of the bin from top to bottom, and the cylindrical section and the discharge port of the bin are arranged in different axes in the vertical direction.

[0018] The bin provided by the application is preferably an eccentric bin, and the self-unstable center of gravity of the material in the eccentric bin can be used to realize the self-vertical falling of the viscous powder to the discharge port of the bin.

[0019] As a preferred technical scheme of the application, the distance between the two axes of the cylindrical section and the discharge port of the bin in the vertical direction is 30-75 mm, for example, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm or 75 mm.

[0020] As a preferred technical scheme of the application, the minimum angle between the conical section and the horizontal plane is not less than 60 degrees, for example, 60 degrees, 63 degrees, 65 degrees, 66 degrees, 67 degrees, 68 degrees, 70 degrees, 73 degrees, 75 degrees, 79 degrees, 80 degrees, 82 degrees, 85 degrees or 90 degrees.

[0021] As a preferred technical scheme of the application, the horizontal section of the discharge port of the bin is rectangular, and the length of the short side is greater than or equal to the radial diameter length of the external shell of the screw feeder.

[0022] As a preferred technical scheme of the application, the length of the short side of the discharge port of the bin is equal to the radial diameter length of the external shell of the screw feeder, and the long side of the discharge port of the bin is tangent to the external shell of the screw feeder, so that the width of the discharge port of the bin can be maximally expanded.

[0023] As a preferred technical scheme of the present application, the discharge end of the screw feeder is provided with a vertically downward screw feeder discharge opening, and the screw shaft extends above the screw feeder discharge opening and forms a screw shaft overhang.

[0024] As a preferred technical scheme of the present application, the axial length of the screw shaft overhang is 50-200mm, such as 50mm, 70mm, 100mm, 130mm, 150mm, 160mm, 180mm or 200mm, etc.

[0025] As a preferred technical scheme of the present application, a screw seal assembly is arranged at the fixed connection between the screw shaft and the rotating shaft of the motor, so as to prevent the superfine powder from flowing back to the rotating shaft of the motor and affecting the normal rotation of the rotating shaft.

[0026] As a preferred technical scheme of the present application, the motor is a speed-reducing motor, and the control line of the speed-reducing motor is led out from the bottom of the support base and connected to the control power supply through the connecting element.

[0027] Compared with the prior art, the present application has at least the following beneficial effects:

[0028] (1) The viscous powder fluidization continuous feeding device is arranged through the overall feeding device, and in particular, the axial section of the screw groove is cooperatively arranged with the inside of the screw shaft penetrating the discharge opening of the bin, so as to avoid arching of the material at the discharge opening of the bin, avoid the screw shaft from being locked, and realize smooth conveying of the viscous powder.

[0029] (2) The viscous powder fluidization continuous feeding device is preferably arranged with an eccentric bin, so as to prevent the superfine powder or viscous powder from hanging on the inner wall of the bin.

[0030] (3) The viscous powder fluidization continuous feeding device is preferably arranged with a screw shaft overhang, i.e. the screw shaft overhang formed by the screw shaft extending above the screw feeder discharge opening, so that the material conveyed by the screw shaft directly falls into the screw feeder discharge opening, and smooth conveying of the viscous powder can be realized.

[0031] (4) The viscous powder fluidization continuous feeding device has the advantages of simple structure and small investment, and can be used for feeding of superfine powder or viscous powder in industry, and in particular, in the field of fluidization feeding of superfine powder or viscous powder. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of a viscous powder fluidization continuous feeding device provided by the present application;

[0033] Figure 2 is Figure 1Schematic diagram of the structure of the middle silo (left is the front view, right is the side view);

[0034] Figure 3 yes Figure 1 Schematic diagram of the structure of the spiral feeder;

[0035] Figure 4 This is another structural diagram of the spiral groove of the screw feeder;

[0036] Figure 5 Schematic diagram of the structure of the silo corresponding to Example 1 of the present invention (left is a front view, right is a side view);

[0037] Figure 6 Schematic diagram of the structure of the silo corresponding to Example 2 of the present invention (left is a front view, right is a side view);

[0038] Figure 7 Schematic diagram of the structure of the silo corresponding to Example 3 of the present invention (left is a front view, right is a side view);

[0039] Figure 8 Schematic diagram of the structure of the silo corresponding to Example 4 of the present invention (left is a front view, right is a side view);

[0040] Figure 9 Schematic diagram of the structure of the silo corresponding to Example 5 of the present invention (left is a front view, right is a side view);

[0041] In the figure: 1. Silo; 2. Screw feeder; 3. Motor; 4. Support base;

[0042] 1-1, silo cover; 1-2, cylindrical section; 1-3, conical section; 1-4, silo discharge port; 1-5, flange;

[0043] 2-1, spiral shaft; 2-2, outer shell; 2-3, spiral support frame; 2-4, spiral sealing assembly; 2-5, screw feeder discharge port; 2-6, spiral blade; 2-7, spiral groove; 2-8, spiral shaft suspension portion;

[0044] 3-1. Rotating shaft; 3-2. Motor support frame. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0046] To better illustrate the present invention and facilitate understanding of the technical solutions of the present invention, typical but non-limiting embodiments of the present invention are as follows:

[0047] See Figures 1-4The application provides a viscous powder fluidization continuous feeding device, which comprises a bin 1, a screw feeder 2, a motor 3 and a supporting base 4; the bin 1, the screw feeder 2 and the motor 3 are independently fixed through the supporting base 4; the screw feeder 2 comprises a coaxial screw shaft 2-1 and an external shell 2-2; the screw shaft 2-1 is fixedly connected with a rotating shaft 3-1 of the motor 3; wherein adjacent two screw blades 2-6 on the screw shaft 2-1 form a spiral groove 2-7 with the screw shaft 2-1, the axial section of the spiral groove 2-7 is rectangular, trapezoidal or semicircular; the upper opening length of the spiral groove 2-7 is greater than the bottom length in the direction away from the screw shaft 2-1; the bin lower outlet 1-4 of the bin 1 is connected with the external shell 2-2 of the screw feeder 2, so that the screw shaft 2-1 of the screw feeder 2 penetrates in the inside of the bin lower outlet 1-4.

[0048] Optionally, the bin 1 comprises a top bin cover 1-1, a cylindrical section 1-2, a conical section 1-3 and a bin lower outlet 1-4 from top to bottom, the cylindrical section 1-2 and the bin lower outlet 1-4 are arranged in different axes in the vertical direction, and the conical section 1-3 and the bin lower outlet 1-4 are connected through a flange 1-5.

[0049] Optionally, the distance between the cylindrical section 1-2 and the bin lower outlet 1-4 in the vertical direction is 30-75 mm.

[0050] Optionally, the smallest angle between the conical section 1-3 and the horizontal plane is not less than 60 degrees.

[0051] Optionally, the horizontal section of the bin lower outlet 1-4 is rectangular, and the short side length is greater than or equal to the radial diameter length of the external shell 2-2 of the screw feeder 2. Preferably, the short side length of the bin lower outlet 1-4 is equal to the radial diameter length of the external shell 2-2 of the screw feeder 2, and the long side of the bin lower outlet 1-4 is tangent to the external shell 2-2 of the screw feeder 2.

[0052] Optionally, the discharge end of the screw feeder 2 is provided with a screw feeder lower outlet 2-5 downward vertically, the screw shaft 2-1 extends above the screw feeder lower outlet 2-5 and forms a screw shaft overhang 2-8. Preferably, the axial length of the screw shaft overhang 2-8 is 50-200 mm.

[0053] Optionally, a screw sealing assembly 2-4 is arranged at the fixed connection between the screw shaft 2-1 and the rotating shaft 3-1 of the motor 3.

[0054] Optionally, the external shell 2-2 of the screw feeder 2 is fixedly connected with the supporting base 4 through a screw supporting frame 2-3.

[0055] Optionally, the motor 3 is a reduction motor, comprising a rotating shaft 3-1 and being fixedly connected with the support base 4 through a motor support frame 3-2, and the control line of the motor is led out from the bottom of the support base 4 and connected with the control power supply through a connecting element.

[0056] Embodiment 1

[0057] The embodiment provides a viscous powder fluidization continuous feeding device, which comprises a hopper, a screw feeder, a motor and a support base; the hopper, the screw feeder and the motor are independently fixed through the support base; the screw feeder comprises a screw shaft and an external shell arranged coaxially; the screw shaft is fixedly connected with the rotating shaft of the motor; wherein adjacent two screw blades on the screw shaft form a spiral groove with the screw shaft, and the axial section of the spiral groove is trapezoidal; in the direction away from the screw shaft, the length of the upper opening of the spiral groove is greater than the length of the bottom; the hopper discharge port of the hopper is connected with the external shell of the screw feeder, so that the screw shaft of the screw feeder penetrates the inside of the hopper discharge port.

[0058] The hopper comprises a top hopper cover, a cylindrical section, a conical section and a hopper discharge port from top to bottom, and the cylindrical section and the hopper discharge port are arranged in different axes in the vertical direction, and the conical section and the hopper discharge port are connected through a flange.

[0059] The distance between the two axes of the cylindrical section and the hopper discharge port in the vertical direction is 50 mm.

[0060] The horizontal section of the hopper discharge port is rectangular, the length of the short side of the hopper discharge port is equal to the radial diameter length of the external shell of the screw feeder, and the long side of the hopper discharge port is tangent to the external shell of the screw feeder.

[0061] The discharge end of the screw feeder is provided with a screw feeder discharge port downward, the screw shaft extends above the screw feeder discharge port and forms a screw shaft overhanging part, and the axial length of the screw shaft overhanging part is 100 mm.

[0062] A screw sealing assembly is arranged at the fixed connection position of the screw shaft and the rotating shaft of the motor.

[0063] The external shell of the screw feeder is fixedly connected with the support base through a screw support frame.

[0064] The motor is a reduction motor, comprising a rotating shaft and being fixedly connected with the support base through a motor support frame, and the control line of the motor is led out from the bottom of the support base and connected with the control power supply through a connecting element.

[0065] ReferenceFigure 5 The silo of the embodiment is an eccentric silo with a total height of 500 mm, a diameter of the cylindrical section of the silo of 300 mm, a height of the cylindrical section of 250 mm, a width of the discharge port of the silo of 60 mm, and a length of the discharge port of 100 mm; an angle of inclination of the conical section of the silo is not less than 60 degrees, and the included angles of the conical section with the horizontal are 60 degrees, 79 degrees, and 65 degrees, respectively, and the minimum included angle is 60 degrees; the diameter of the outer shell of the screw feeder is 55 mm, the length of the screw shaft is 300 mm, the groove depth is 15 mm, and the pitch of the screw blades is 20 mm; and the frequency of the speed reducer motor is controllable between 0 and 50 Hz.

[0066] The embodiment can stably convey 200-nm ultrafine iron oxide and realize continuous and stable feeding of the ultrafine iron oxide.

[0067] Embodiment 2

[0068] The embodiment provides a viscous powder fluidization continuous feeding device, and the difference from the embodiment 1 is only in the specific size design of the silo and the screw feeder.

[0069] Referring to Figure 6 The silo of the embodiment is an eccentric silo with a total height of 700 mm, a diameter of the cylindrical section of the silo of 400 mm, a height of the cylindrical section of 350 mm, a width of the discharge port of the silo of 105 mm, and a length of the discharge port of 150 mm; an angle of inclination of the conical section of the silo is not less than 60 degrees, and the included angles of the conical section with the horizontal are 60 degrees, 82 degrees, and 67 degrees, respectively, and the minimum included angle is 60 degrees; the diameter of the shell of the screw feeder is 105 mm, the length of the screw shaft is 600 mm, the groove depth is 10 mm, and the pitch of the screw blades is 30 mm; and the frequency of the speed reducer motor is controllable between 0 and 50 Hz.

[0070] The embodiment can stably convey 30-nm nano basic nickel carbonate powder and realize continuous and stable feeding of the nano basic nickel carbonate powder.

[0071] Embodiment 3

[0072] The embodiment provides a viscous powder fluidization continuous feeding device, and the difference from the embodiment 1 is only in the specific size design of the silo and the screw feeder.

[0073] Referring to Figure 7 The silo of the embodiment is an eccentric silo with a total height of 600 mm, a diameter of the cylindrical section of the silo of 350 mm, a height of the cylindrical section of 260 mm, a width of the discharge port of the silo of 75 mm, and a length of the discharge port of 100 mm; an angle of inclination of the conical section of the silo is not less than 60 degrees, and the included angles of the conical section with the horizontal are 66 degrees, 75 degrees, and 68 degrees, respectively, and the minimum included angle is 66 degrees; the diameter of the shell of the screw feeder is 55 mm, the length of the screw shaft is 500 mm, the groove depth is 15 mm, and the pitch of the screw blades is 50 mm; and the frequency of the speed reducer motor is controllable between 0 and 50 Hz.

[0074] Implementation effect: this embodiment can stably transport 1 μm superfine iron ore powder, and realize continuous and stable feeding of the superfine iron ore powder.

[0075] Example 4

[0076] This embodiment provides a viscous powder fluidization continuous feeding device, and the difference from example 1 is only in the specific size design of the silo and the screw feeder.

[0077] Referring to Figure 8 , the silo of this embodiment is an eccentric silo with a total height of 1000 mm, a diameter of the cylindrical section of the silo of 600 mm, a height of the cylindrical section of 500 mm, a width of the silo discharge port of 150 mm, and a length of 200 mm; the inclination angle of the conical section of the silo is not less than 60 degrees, and the included angles of the conical section with the horizontal plane are 63 degrees, 73 degrees and 66 degrees respectively, and the minimum included angle is 63 degrees; the diameter of the screw feeder shell is 150 mm, the length of the screw shaft is 800 mm, the groove depth is 50 mm, and the spiral blade spacing is 25 mm; the frequency of the speed reducer motor is controllable at 0-50 Hz.

[0078] Implementation effect: this embodiment can stably transport 1 μm superfine cuprous oxide, and realize continuous and stable feeding of the superfine cuprous oxide.

[0079] Example 5

[0080] This embodiment provides a viscous powder fluidization continuous feeding device, and the difference from example 1 is only in the specific size design of the silo and the screw feeder.

[0081] Referring to Figure 9 , the silo of this embodiment is an eccentric silo with a total height of 500 mm, a diameter of the cylindrical section of the silo of 300 mm, a height of the cylindrical section of 250 mm, a width of the silo discharge port of 60 mm, and a length of 200 mm; the inclination angle of the conical section of the silo is not less than 60 degrees, and the included angles of the conical section with the horizontal plane are 69 degrees, 90 degrees and 65 degrees respectively, and the minimum included angle is 65 degrees; the diameter of the screw feeder shell is 60 mm, the length of the screw shaft is 600 mm, the groove depth is 10 mm, and the spiral blade spacing is 30 mm; the frequency of the speed reducer motor is controllable at 0-50 Hz.

[0082] Implementation effect: this embodiment can stably transport 800 nm superfine nickel protoxide, and realize continuous and stable feeding of the superfine nickel protoxide.

[0083] In summary, the viscous powder fluidization continuous feeding device has the advantages of simple structure, small investment, etc., and can be used for feeding of superfine powder or viscous powder in industry, especially in the field of fluidization feeding of superfine powder or viscous powder.

[0084] The present application is described by the above embodiments to illustrate the detailed structural features of the present application, but the present application is not limited to the above detailed structural features, that is, it does not mean that the present application must rely on the above detailed structural features to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of the components selected by the present application, addition of auxiliary components, selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present application.

[0085] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above embodiments, and within the technical concept scope of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0086] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners.

[0087] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed by the present application.

Claims

1. A viscous powder fluidization continuous feeding device, characterized in that: It includes a silo, a screw feeder, a motor and a support base; the silo, the screw feeder and the motor are independently fixed by the support base; the screw feeder includes a coaxial screw shaft and an external shell; the screw shaft is fixedly connected to the rotating shaft of the motor; Wherein, two adjacent spiral blades on the spiral shaft form a spiral groove with the spiral shaft, and the axial cross-section of the spiral groove is rectangular, trapezoidal or semicircular; in the direction away from the spiral shaft, the upper opening length of the spiral groove is greater than the bottom length; The silo discharge port of the silo is connected to the outer shell of the screw feeder, so that the screw shaft of the screw feeder passes through the interior of the silo discharge port.

2. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: The silo comprises a top silo cover, a cylindrical section, a conical section and the silo discharge port from top to bottom, and the cylindrical section and the silo discharge port are not arranged on the same axis in the vertical direction.

3. The viscous powder fluidization continuous feeding device according to claim 2, characterized in that: The vertical distance between the cylindrical section and the silo discharge port is 30-75 mm.

4. The viscous powder fluidization continuous feeding device according to claim 2 or 3, characterized in that: The minimum angle between the tapered section and the horizontal plane is not less than 60 degrees.

5. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: The horizontal cross-section of the silo discharge port is rectangular, and the length of the short side thereof is greater than or equal to the radial diameter length of the outer shell of the screw feeder.

6. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: The short side length of the silo discharge port is equal to the radial diameter length of the outer shell of the screw feeder, and the long side of the silo discharge port is tangent to the outer shell of the screw feeder.

7. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: The discharge end of the spiral feeder is provided with a vertically downward spiral feeder discharge port, and the spiral shaft extends above the spiral feeder discharge port to form a spiral shaft suspended portion.

8. The viscous powder fluidization continuous feeding device according to claim 7, characterized in that: The axial length of the suspended portion of the spiral shaft is 50-200 mm.

9. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: A spiral sealing assembly is provided at the fixed connection between the spiral shaft and the rotating shaft of the motor.

10. The viscous powder fluidization continuous feeding device according to claim 1, characterized in that: The motor is a reduction motor.

Images