Intrinsic safety type spiral continuous feeding device for high-sensitivity powdery materials

Abstract

The invention relates to the field of feeding, in particular to a high-sensitivity powdery material intrinsic safety type spiral continuous feeding device which comprises a storage assembly, a feeding assembly, a feeding assembly, a feeding assembly, a feeding assembly and a feeding assembly. The storage assembly comprises a transmission part and a containing part, and the containing part is arranged on the transmission part; the feeding assembly comprises a first layer piece, a second layer piece and a grinding piece, the first layer piece is arranged on the transmission piece, the second layer piece is arranged on the containing piece, and the grinding piece is arranged on the transmission piece; the spiral feeding device capable of being used for precise and continuous feeding of superfine and high-sensitivity powder materials is provided through the interaction of the storage assembly and the feeding assembly, the defects of an existing feeding technology are overcome, the situation that materials scattered between metal structures are burnt and exploded during friction and collision in the cleaning process is avoided, and the safety degree of operators is improved.

Description

Technical Field

[0001] The invention relates to the field of feeding, in particular to an intrinsically safe spiral continuous feeding device for highly sensitive powdery materials. Background Art

[0002] The highly sensitive powdered material in the present invention refers to a powdered material that may have quality or safety accident risks such as reaction, combustion, explosion, particle breakage, etc. under strong stimulation conditions such as impact, extrusion, friction, etc.

[0003] The screw feeder is one of the most commonly used equipment for feeding powder materials. It is particularly widely used in the chemical and pharmaceutical industries where precise quantitative feeding is often required. With the development of screw feeders, various forms of feeders have been extended, including single screw feeders and double screw feeders. Among them, the double screw feeder can feed powder materials from several liters per hour to thousands of liters per hour, and the feeding accuracy can reach 0.5%, which is the most widely used. The function of the screw feeder for feeding powder materials is very mature. However, for highly sensitive powder materials, there are safety issues with screw feeding, which are mainly manifested as: friction and collision between the cantilever transmission rod of the single screw feeder and the double screw feeder and the feeding barrel, friction and collision between the two transmission rods of the double screw feeder, and friction of bearing feeding.

[0004] Generally, in order to improve the feeding safety, highly sensitive powders are fed by vibration feeding. However, for some ultrafine or nano powders with a particle size less than 50um, due to poor dispersion, the vibration feeding method cannot form a uniform discharge of the material, which will lead to interruption or concentrated sliding, and cannot achieve continuous and accurate measurement.

[0005] The traditional material pushing method is now changed to a newly invented material pulling method to prevent the material from being squeezed into the bearing gap of the screw feeder. This invention effectively solves the most critical danger point of the screw feeder when used for sensitive materials. However, there are still the following problems: the distance between the transmission rod and the barrel, and between the transmission rods is too small, and there is a high risk of explosion accidents due to friction and collision when extrusion deformation occurs; there is a risk of materials entering the bearing due to accumulation and floating; there is a problem that ultra-fine powders cannot be accurately measured due to bridges forming "rat holes". Summary of the invention

[0006] In view of the above-mentioned problems that the distances between the transmission rod and the barrel, and between the transmission rods are too small, there is a high risk of explosion accidents due to friction and collision when extrusion deformation occurs; there is a risk of materials entering the bearings due to accumulation and floating; there is a problem that ultrafine powders can form "rat holes" by bridging, making it impossible to accurately measure, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide an intrinsically safe spiral continuous feeding device for highly sensitive powdery materials.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0009] The storage component comprises a transmission member and a receiving member, wherein the receiving member is arranged on the transmission member; and

[0010] The feeding component comprises a first layer component, a second layer component and a grinding component, wherein the first layer component is arranged on the transmission component, the second layer component is arranged on the accommodating component, and the grinding component is arranged on the transmission component.

[0011] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the transmission member includes a transmission motor for power output, a transmission rod is arranged on the transmission motor, an inner barrel is arranged on the transmission rod, and a support bearing is arranged on the inner barrel.

[0012] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the accommodating member includes an outer barrel arranged on the inner barrel, a hopper arranged on the outer barrel, a safety chamber arranged on the outer barrel, and a percussion hammer arranged on the outer barrel.

[0013] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the striking position of the striking hammer is the outer wall surface of the inner barrel.

[0014] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the first layer includes a first front end surface arranged on the inner barrel, and a first rear end surface arranged on the inner barrel.

[0015] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the first layer also includes a first feed port arranged on the inner barrel, a first discharge port arranged on the inner barrel, a first residual material port arranged on the inner barrel, and a knocking hole arranged on the inner barrel.

[0016] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the second layer member includes a second front end face arranged on the outer barrel, and a second rear end face arranged on the outer barrel.

[0017] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the second layer also includes a second feed port arranged on the outer barrel, a second discharge port arranged on the outer barrel, and a second residual material port arranged on the outer barrel.

[0018] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the radius of the knocking hole is R, wherein 0.25R1≤R≤R1, and R1 is the radius of the transmission rod.

[0019] As a preferred solution of the intrinsically safe spiral continuous feeding device for highly sensitive powdered materials described in the present invention, the grinding part includes a thread arranged on the transmission rod, a cylinder is arranged on the transmission rod, the height of the thread is H, and the minimum distance H1 between the end face of the thread and the inner wall of the inner barrel is ≥1mm.

[0020] The beneficial effects of the present invention are as follows: through the interaction of the placement component and the feeding component, a spiral feeding device is provided which can be used for the precise and continuous feeding of ultrafine and highly sensitive powder materials, thus making up for the shortcomings of the existing feeding process; through the modular structure, the installation of a percussion hammer, a safety chamber, the increase of the transmission rod gap and other new design methods, the spiral feeder can be applied to finer and more sensitive materials, thus expanding the application scope of the spiral feeding principle; through the design of a flexible inner barrel and a structured outer barrel, the installation of a percussion hammer during the feeding process is possible, which can provide a solution for eliminating the "rat hole" phenomenon of traditional spiral feeding; the modular design form facilitates the cleaning of highly sensitive materials, and can realize the precise, continuous and safe feeding of highly sensitive powder materials, avoiding the explosion of materials scattered between metal structures during the cleaning process due to friction and collision, thereby improving the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the half-section structure of an intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to the present invention.

[0023] Figure 2 The present invention is a schematic diagram of the disassembled structure of an intrinsically safe spiral continuous feeding device for highly sensitive powdered materials.

[0024] Figure 3 The figure is a schematic diagram of the structure of a spiral continuous feeding device for highly sensitive powdered materials according to the present invention, viewed from above.

[0025] Figure 4 The figure is a side structural schematic diagram of a highly sensitive powdered material intrinsically safe spiral continuous feeding device according to the present invention.

[0026] Figure 5 The figure is a schematic diagram of the first layer structure of an intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to the present invention.

[0027] Figure 6 The present invention is a schematic diagram of the grinding component structure of an intrinsically safe spiral continuous feeding device for highly sensitive powdered materials. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] Example 1

[0033] Reference Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a highly sensitive powdered material intrinsically safe spiral continuous feeding device, the device includes a placement component 100, including a transmission member 101 and a receiving member 102, the receiving member 102 is arranged on the transmission member 101, and the initial working steps of the device are constituted by the interaction between the transmission member 101 and the receiving member 102.

[0034] Specifically, the transmission member 101 includes a transmission motor 101a for power output, a transmission rod 101b is arranged on the transmission motor 101a, and the transmission rod 101b is fixedly connected to the transmission motor 101a. There are two transmission rods 101b, which are arranged in parallel. The start of the transmission motor 101a drives the rotation of the transmission rod 101b. The inner barrel 101c is arranged on the transmission rod 101b, and the inner barrel 101c is sleeved on the outside of the transmission rod 101b. The rotation of the transmission rod 101b will not drive the rotation of the inner barrel 101c. The inner barrel 101c is a thin-walled hollow structure with equal cross-section, and the material is conductive rubber. The cross-section of the inner barrel 101c is an 8-shaped structure, which is to accommodate the two transmission rods 101b. The support bearing 101d is arranged on the inner barrel 101c, and the support bearing 101d is clamped at both ends of the inner barrel 101c and allows the transmission rod 101b to pass through.

[0035] Further, the container 102 includes an outer barrel 102a disposed on the inner barrel 101c, the outer barrel 102a is a thin-walled hollow structure with a uniform cross-section, and is made of conductive metal. The outer size of the inner barrel 101c is the same as the inner size of the outer barrel 102a, and the inner barrel 101c is inserted into the outer barrel 102a. The hopper 102b is disposed on the outer barrel 102a, and the hopper 102b is fixedly connected to the outer barrel 102a and extends to the inner barrel 101c, and is located on the upper side of the outer barrel 102a, so that the material The hopper 102b can directly enter the transmission rod 101b in the inner barrel 101c, the safety chamber 102c is arranged on the outer barrel 102a, the safety chamber 102c is fixedly connected to the outer barrel 102a and extends into the inner barrel 101c, the safety chamber 102c is fixed to the lower side of the outer barrel 102a like a storage box, the percussion hammer 102d is arranged on the outer barrel 102a, the percussion hammer 102d is swingably connected to the outer barrel 102a, and the percussion hammer 102d percussion position is the outer wall surface of the inner barrel 101c;

[0036] Among them, the inner barrel 101c not only has the function of carrying materials and breaking the "rat hole" when the hammer 102d strikes, but also has the function of "flexibly giving way" when the outer barrel 102a or the transmission rod 101b is accidentally deformed, thereby avoiding direct collision between metals.

[0037] Different from the conventional screw feeder, the cross section of the outer barrel 102a of the screw feeder of the present invention is 8-shaped, circular or rectangular, and the outer barrel 102a is a split and detachable combined frame structure, or even a frame structure.

[0038] During operation, the transmission rod 101b can be rotated by starting the transmission motor 101a, and the material can enter the outer barrel 102a and the transmission rod 101b in the inner barrel 101c through the hopper 102b, thus completing the work of the feeding device.

[0039] Example 2

[0040] Reference Figure 1 - Figure 6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this device includes a feeding component 200, including a first layer component 201, a second layer component 202 and a grinding component 203. The first layer component 201 is arranged on the transmission component 101, the second layer component 202 is arranged on the accommodating component 102, and the grinding component 203 is arranged on the transmission component 101. Through the interaction between the first layer component 201, the second layer component 202 and the grinding component 203, the device can achieve accurate, continuous and safe feeding of highly sensitive powdered materials, which makes up for the shortcomings of the existing feeding process.

[0041] Specifically, the first layer 201 includes a first front end face 201a disposed on the inner barrel 101c, the first front end face 201a is opened on one side of the inner barrel 101c, a first rear end face 201b is disposed on the inner barrel 101c, and the first rear end face 201b is opened on the other side of the inner barrel 101c. The design of the first front end face 201a and the first rear end face 201b allows the flow of materials in the entire inner barrel 101c.

[0042] The first layer 201 further includes a first feed port 201c disposed on the inner barrel 101c, the first feed port 201c is located at the upper side of the inner barrel 101c, and is for the convenience of material entry, a first discharge port 201d is disposed on the inner barrel 101c, the first discharge port 201d is located at the lower left side of the inner barrel 101c, and is for the convenience of transferring the processed material, and a first residual material port 201e is located It is placed on the inner barrel 101c, the first residual material port 201e is opened on the lower right side of the inner barrel 101c, and is connected to the safety chamber 102c, the knocking hole 201f is set on the inner barrel 101c, and the knocking hole 201f is opened on the inner barrel 101c to facilitate the knocking work of the knocking hammer 102d. When the knocking hammer 102d is working, its knocking position is the outer wall surface of the inner barrel 101c corresponding to the center of the knocking hole 201f.

[0043] Further, the second layer 202 includes a second front end face 202a disposed on the outer barrel 102a, the second front end face 202a is opened on one side of the outer barrel 102a, and a second rear end face 202b is disposed on the outer barrel 102a, and the second rear end face 202b is opened on the other side of the outer barrel 102a. Through the second front end face 202a and the second rear end face 202b, the outer barrel 102a can also flow materials like the inner barrel 101c.

[0044] Among them, the second layer 202 also includes a second feed port 202c arranged on the outer barrel 102a, and the second feed port 202c is opened on the upper side of the outer barrel 102a, so that the material passes through the hopper 102b to enter the inner barrel 101c, a second discharge port 202d is arranged on the outer barrel 102a, and the second discharge port 202d is opened on the lower left side of the outer barrel 102a, so that the material processed in the inner barrel 101c flows out through the outer barrel 102a, and a second residual material port 202e is arranged on the outer barrel 102a, and the second residual material port 202e is opened on the lower right side of the outer barrel 102a, so that the residual material processed in the inner barrel 101c flows into the safety chamber 102c through the second residual material port 202e.

[0045] The remaining structure is the same as that of the embodiment.

[0046] Operation process: the outer size of the inner barrel 101c is the same as the inner size of the outer barrel 102a, the inner barrel 101c is inserted into the outer barrel 102a, the first front end face 201a is flush with the second front end face 202a, the first rear end face 201b is flush with the second rear end face 202b, the first feed port 201c, the first discharge port 201d, and the first residual port 201e are respectively aligned with the second feed port 202c, the second discharge port 202d, and the second residual port 202e; the transmission system is connected to the first rear end face 201b of the outer barrel 102a; one end of the transmission rod 101b passes through the entire inner barrel 101c through the second front end face 202a of the inner barrel 101c The barrel 101c is connected to the transmission system; the support bearing 101d is connected to the other end of the transmission rod 101b, and the support bearing 101d is fixed on the first front end face 201a of the outer barrel 102a; the hopper 102b is connected to the first feed port 201c of the outer barrel 102a, and the safety chamber 102c is connected to the first residual material port 201e of the outer barrel 102a; the knocking hammer 102d is installed on the external feeding platform, and when the knocking hammer 102d is working, its knocking position is the outer wall surface of the inner barrel 101c corresponding to the center of the knocking hole 201f; the entire feeding device is supported and installed on the feeding platform through the outer barrel 102a and the transmission motor 101a;

[0047] In addition to the material bearing function and the "rat hole breaking" function when the hammer 102d strikes, the inner barrel 101c also has the function of "flexibly giving way" when the outer barrel 102a or the transmission rod 101b is unexpectedly deformed, thereby avoiding direct metal-to-metal collision;

[0048] Different from the conventional screw feeder, the cross section of the outer barrel 102a of the screw feeder of the present invention is 8-shaped, circular or rectangular, and the outer barrel 102a is a split and detachable combined frame structure, or even a frame structure.

[0049] Example 3

[0050] Reference Figure 1 - Figure 6 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the radius of the knocking hole 201f of this device is R, wherein 0.25R1≤R≤R1, R1 is the radius of the transmission rod 101b, the grinding member 203 includes a thread 203a arranged on the transmission rod 101b, the thread 203a is opened on the transmission rod 101b, so that there is a certain cut in the transmission rod 101b, the cylinder 203b is arranged on the transmission rod 101b, the cylinder 203b is the part left after the transmission rod 101b is opened with the thread 203a, and forms a certain height difference with the thread 203a, the height of the thread 203a is H, and the minimum distance H1 between the end face of the thread 203a and the inner wall surface of the inner barrel 101c is ≥1mm.

[0051] Among them, the arrangement position is as follows: in the axial direction, the distance L1 between the center of the knocking hole 201f closest to the first feed port 201c and the edge of the first feed port 201c on the same side is greater than R, the center distance L2 between adjacent knocking holes 201f is the same and greater than 2R, and the distance L3 between the center of the knocking hole 201f closest to the first discharge port 201d and the edge of the first discharge port 201d on the same side is greater than R; in the cross-sectional direction, the axis passing through the center of the transmission rod 101b is taken as the reference line, and the line passing through the center of the knocking hole 201f and coinciding with the radial line of the transmission rod 101b is taken as the auxiliary line, and the angle between the reference line and the auxiliary line is 0°≤θ≤360°;

[0052] like Figure 6 As shown, the height of the thread 203a of the transmission rod 101b is H, and the minimum distance H1 between the end face of the thread 203a and the inner wall of the inner barrel 101c is ≥1mm. For safety reasons, the distance can even be 2mm or 10mm according to different materials. (There are test data. For the extrusion of common materials and the effect of the central droop of the transmission rod 101b, in an industrial 100kg / h feeder, the maximum droop distance tested multiple times is 0.9mm.)

[0053] When the spiral feeding device is a double spiral, the minimum spacing between the side surfaces of the adjacent and nearest threads 203a of the two transmission rods 101b along the axial direction is H2, and the minimum spacing between the end surface of the thread 203a and the cylinder 203b of the other transmission rod 101b is H3, 1mm≤H2, 1mm≤H3. (There are test data. For common material extrusion, metal deformation, and installation errors, in industrial 100kg / h feeders, the maximum axial movable distance of the transmission rod 101b was tested many times to be 0.3mm, and the maximum radial swing was 0.7mm. For safety, a certain margin is left according to the 1mm regulation)

[0054] Furthermore, H3>H.

[0055] The maximum striking displacement Y of the striking hammer 102d is ≤ H1.

[0056] The remaining structure is the same as that of the embodiment.

[0057] Operation steps: By setting the size of the knocking hole 201f and the knocking displacement of the knocking hammer 102d in detail and accurately, as well as the detailed setting and construction of the spacing of the threads 203a in the transmission rod 101b, it is possible to achieve accurate, continuous and safe feeding of highly sensitive powdered materials, avoid the explosion of materials scattered between metal structures during the cleaning process due to friction and collision, and improve the safety of operators.

[0058] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0059] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A highly sensitive powder material intrinsically safe spiral continuous feeding device, characterized by: include, A storage assembly (100) comprises a transmission member (101) and a receiving member (102), wherein the receiving member (102) is arranged on the transmission member (101); and The feeding assembly (200) comprises a first layer component (201), a second layer component (202) and a grinding component (203), wherein the first layer component (201) is arranged on the transmission component (101), the second layer component (202) is arranged on the accommodating component (102), and the grinding component (203) is arranged on the transmission component (101).

2. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 1 is characterized by: The transmission member (101) comprises a transmission motor (101a) for power output, a transmission rod (101b) arranged on the transmission motor (101a), an inner barrel (101c) arranged on the transmission rod (101b), and a support bearing (101d) arranged on the inner barrel (101c).

3. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 2 is characterized by: The accommodating member (102) comprises an outer barrel (102a) arranged on the inner barrel (101c), a hopper (102b) arranged on the outer barrel (102a), a safety chamber (102c) arranged on the outer barrel (102a), and a striking hammer (102d) arranged on the outer barrel (102a).

4. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 3 is characterized by: The striking position of the striking hammer (102d) is the outer wall surface of the inner barrel (101c).

5. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 3 or 4, characterized in that: The first layer (201) comprises a first front end surface (201a) arranged on the inner barrel (101c), and a first rear end surface (201b) arranged on the inner barrel (101c).

6. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 5 is characterized by: The first layer (201) also includes a first feed port (201c) arranged on the inner barrel (101c), a first discharge port (201d) arranged on the inner barrel (101c), a first residual material port (201e) arranged on the inner barrel (101c), and a knocking hole (201f) arranged on the inner barrel (101c).

7. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 6 is characterized by: The second layer (202) includes a second front end surface (202a) disposed on the outer barrel (102a), and a second rear end surface (202b) disposed on the outer barrel (102a).

8. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 7 is characterized by: The second layer (202) further includes a second feed port (202c) arranged on the outer barrel (102a), a second discharge port (202d) arranged on the outer barrel (102a), and a second residual material port (202e) arranged on the outer barrel (102a).

9. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 8, characterized in that: The radius of the knocking hole (201f) is R, wherein 0.25R1≤R≤R1, and R1 is the radius of the transmission rod (101b).

10. The intrinsically safe spiral continuous feeding device for highly sensitive powdered materials according to claim 8 or 9, characterized in that: The grinding piece (203) comprises a thread (203a) arranged on the transmission rod (101b), a cylinder (203b) arranged on the transmission rod (101b), the height of the thread (203a) is H, and the minimum distance H1 between the end face of the thread (203a) and the inner wall surface of the inner barrel (101c) is ≥1 mm.

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