Anti-clogging screw conveying mechanism

Abstract

The utility model discloses a kind of anti-clogging screw conveying mechanism, including conveying pipeline, screw shaft being arranged in conveying pipeline and spiral blade being arranged on screw shaft, conveying pipeline is provided with feed inlet and radial discharge port, radial discharge port is provided with inclined block, the inclined block has the inclined plane towards radial discharge port direction, under the action of inclined plane, the material conveyed in conveying pipeline is guided to radial discharge port. The inclined plane is plane inclined plane, the included angle of the plane inclined plane and conveying pipeline axis is 15°-75°. The utility model can effectively prevent the plugging phenomenon of material in discharge port area under the premise of maintaining radial discharge advantage.

Description

Technical Field

[0001] This utility model relates to the field of conveying equipment technology, specifically to an anti-clogging spiral conveying mechanism. Background Technology

[0002] Screw conveyors are a common material conveying device widely used in conveying granular and powdery materials. They propel the material axially along the conveying pipeline through the rotation of the screw blades.

[0003] Existing screw conveyor mechanisms have significant technical shortcomings when conveying solid-liquid mixtures such as viscous granules and fruit chunks, as well as fibrous materials. When the material moves to the radial discharge port area, due to the lack of an effective guiding mechanism, the material cannot be discharged from the radial outlet in a timely manner, resulting in the material being squeezed, deformed, and clogged at the end of the screw, causing difficulties in discharge and even screw rotation resistance.

[0004] Currently available anti-clogging solutions mainly include two types:

[0005] One approach is to adopt an open discharge end design (axial discharge at the end), and the other is to install a reverse spiral structure at the end. However, the open discharge end design changes the basic discharge method and is not suitable for radial discharge applications; while the reverse spiral structure alleviates end accumulation to some extent, it increases the complexity of the structure, raises the processing and manufacturing cost, and has limited adaptability to viscous materials.

[0006] Especially in fruit cutting conveyor applications in the food and beverage industry, the juice released by the fruit pieces under compression forms a viscous mixture with the fruit pulp fibers, further exacerbating the blockage. Utility Model Content

[0007] The purpose of this invention is to provide a clogging-resistant spiral conveying mechanism that can effectively prevent material blockage in the discharge port area while maintaining the advantage of radial discharge.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A clog-resistant screw conveying mechanism includes a conveying pipe, a screw shaft disposed within the conveying pipe, and screw blades disposed on the screw shaft. The conveying pipe is provided with an inlet and a radial outlet. An inclined block is provided at the radial outlet, and the inclined block has an inclined surface facing the radial outlet. Under the action of the inclined surface, the material conveyed in the conveying pipe is guided to the radial outlet.

[0010] Furthermore, the inclined plane is a planar inclined plane, and the angle between the planar inclined plane and the axis of the conveying pipeline is 15°-75°.

[0011] Furthermore, the inclined plane is a curved inclined plane.

[0012] Furthermore, the inclined block is installed on the inner wall of the conveying pipe by means of threads or bolts.

[0013] Furthermore, the inner wall of the conveying pipe is provided with a reverse spiral groove.

[0014] Furthermore, the depth of the reverse spiral groove is 1-5mm, and the cross-section of the reverse spiral groove is circular, triangular, rectangular, or trapezoidal.

[0015] Furthermore, the conveying pipeline includes a pipe body and a first end cap and a second end cap disposed at both ends of the pipe body. A screw shaft is rotatably mounted on the first end cap and the second end cap, and one end of the screw shaft extends out of the first end cap. A groove is provided on the pipe body, and a pin is provided on the inclined block. The pin and the groove cooperate with each other. The screw shaft passes through the inclined block, and the inclined block is fixed after the first end cap cooperates with the pipe body.

[0016] Furthermore, the screw shaft and the wedge block are rotatably sealed together.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes the inclined surface design of the ramp block to work synergistically with the spiral blades, creating a forced guiding mechanism in the final stage of material conveying. When the material moves to the discharge area, the presence of the ramp surface alters the force state of the material: the axial thrust of the spiral blades is decomposed into a radial component, which points precisely in the radial direction of the discharge port. This overcomes the limitation of traditional spiral conveying mechanisms where material is discharged solely by its own flow. While maintaining the simple structure of traditional spiral conveyors, this invention achieves reliable conveying of high-viscosity, high-fiber materials, solving a long-standing technical problem in the industry. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure label:

[0023] 101 Conveying pipe, 102 Screw shaft, 103 Helical blade, 104 Inlet, 105 Radial outlet, 106 Inclined block, 107 Inclined surface, 108 Reverse spiral groove, 109 Pipe body, 110 First end cap, 111 Second end cap. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] Example 1:

[0032] See Figure 1 and Figure 2 This embodiment discloses an anti-clogging screw conveying mechanism, including a conveying pipe 101, a screw shaft 102 disposed within the conveying pipe 101, and screw blades 103 disposed on the screw shaft 102. The conveying pipe 101 is provided with an inlet 104 and a radial outlet 105. An inclined block 106 is provided at the radial outlet 105, the inclined block 106 having an inclined surface 107 facing the radial outlet. Under the action of the inclined surface 107, the material conveyed in the conveying pipe 101 is guided to the radial outlet 105. By providing an inclined block 106 with an inclined surface 107 at the radial outlet 105, the material is guided to the radial outlet 105 using the inclined surface 107, fundamentally solving the problem of material blockage in the outlet area. By changing the force state of the material through the inclined surface 107, the axial thrust of the screw blades 103 is decomposed into a radial discharge force, ensuring smooth material discharge.

[0033] Furthermore, the inclined plane 107 is a planar inclined plane 107, and the angle between the planar inclined plane 107 and the axis of the conveying pipe 101 is 15°-75°. This can prevent material rebound while ensuring discharge efficiency. The small angle of 15° is suitable for materials with good flowability, while the large angle of 75° is suitable for viscous materials. Good anti-clogging effect can be achieved within this range.

[0034] Furthermore, the inclined surface 107 is a curved inclined surface 107, and the ratio of the radius of curvature of the curved inclined surface 107 to the outer diameter of the helical blade 103 is 0.5:1 to 2:1. This can optimize the movement trajectory of materials and reduce energy loss. A smaller radius of curvature (0.5:1) is suitable for short-distance rapid flow guidance, while a larger radius of curvature (2:1) is suitable for long-distance stable flow guidance.

[0035] Furthermore, the inclined block 106 is installed on the inner wall of the conveying pipe 101 by welding, threading, or bolting. Welding provides a robust structure suitable for high-temperature and high-pressure conditions; bolting facilitates disassembly and cleaning, making it particularly suitable for applications in the food and pharmaceutical industries that require frequent cleaning.

[0036] Furthermore, the inner wall of the conveying pipe 101 is provided with a reverse spiral groove 108. The reverse spiral groove 108 creates an additional radial force, which works synergistically with the inclined block 106. When the material rotates with the spiral blade 103, the reverse spiral groove 108 generates a reverse flow guiding effect, preventing the material from rotating circumferentially with the spiral blade 103 and improving the radial discharge efficiency.

[0037] Furthermore, the depth of the reverse spiral groove 108 is 1-5 mm. This depth range ensures sufficient flow guidance without significantly increasing flow resistance. A shallow groove of 1 mm is suitable for fine particulate materials, while a deep groove of 5 mm is suitable for large particulate or fibrous materials.

[0038] Furthermore, the cross-section of the reverse spiral groove is circular, triangular, rectangular, or trapezoidal. A circular cross-section is preferred.

[0039] Furthermore, the conveying pipe 101 includes a pipe body 109 and a first end cap 110 and a second end cap 111 disposed at both ends of the pipe body 109. A screw shaft 102 is rotatably mounted on the first end cap 110 and the second end cap 111, with one end of the screw shaft 102 extending out of the first end cap 110. A groove is provided on the pipe body 109, and a pin is provided on the inclined block 106. The pin and the groove cooperate with each other, and the screw shaft 102 passes through the inclined block 106. After the first end cap 110 cooperates with the pipe body 109, the inclined block 106 is fixed. The cooperation of the groove and the pin achieves accurate positioning and rapid installation of the inclined block 106, and the cooperation of the first end cap 110 with the pipe body 109 achieves reliable fixation of the inclined block 106. This installation method ensures the relative positional accuracy of the inclined block 106 and the spiral blade 103, ensuring the stability of the anti-clogging effect.

[0040] Furthermore, the screw shaft 102 is rotatably sealed to the inclined block 106. This rotatable sealed connection prevents material from entering the gap between the inclined block 106 and the screw shaft 102, avoiding the creation of new blockage points at this location, while also reducing material residue and facilitating cleaning and maintenance.

[0041] To facilitate a better understanding of this invention by those skilled in the art, specific examples will be used to further illustrate this invention below.

[0042] The anti-clogging screw conveyor mechanism includes a conveying pipe 101, a screw shaft 102, a screw blade 103, a radial discharge port 105, and an inclined block 106.

[0043] The conveying pipe 101 has a cylindrical structure with an inner diameter of 150mm and is made of food-grade stainless steel. The screw shaft 102 is rotatably mounted at both ends of the conveying pipe 101 via bearing seats. The helical blade 103 is welded to the screw shaft 102. The outer diameter of the helical blade 103 is 148mm, the gap between the helical blade 103 and the inner wall of the conveying pipe 101 is 1mm, and the pitch is 120mm.

[0044] The radial discharge port 105 is located on the side wall of the conveying pipe 101, 200mm from the end of the spiral, and the discharge port size is 100mm×80mm.

[0045] The inclined block 106 is fixedly installed on the inner wall of the conveying pipe 101 by welding, located 30mm in front of the radial discharge port 105. The inclined block 106 has a planar inclined surface 107, and the angle between the planar inclined surface 107 and the axis of the conveying pipe 101 is 15°.

[0046] Furthermore, in some preferred embodiments, the inclined surface 107 of the inclined block 106 is a curved inclined surface 107, and the radius of curvature of the curved inclined surface 107 is 74 mm (the ratio of the outer diameter of the helical blade 103 to that of the curved blade 103 is 0.5:1). The maximum angle between the curved inclined surface 107 and the axis of the conveying pipe 101 is 75°. A reverse helical groove 108 is provided on the inner wall of the conveying pipe 101. The depth of the reverse helical groove 108 is 1 mm, the pitch is 240 mm, and the direction of rotation is opposite to that of the helical blade 103. The inclined block 106 is fixed to the inner wall of the conveying pipe 101 by bolts, which facilitates disassembly and cleaning.

[0047] Furthermore, in some preferred embodiments, the conveying pipe 101 includes a pipe body 109, a first end cap 110, and a second end cap 111. A screw shaft 102 is rotatably mounted on the first end cap 110 and the second end cap 111 via bearings, and one end of the screw shaft 102 extends out of the first end cap 110 for connecting to a drive device.

[0048] A slot is provided on the tube body 109, and a pin is provided on the wedge block 106. During installation, the pin and the slot cooperate to position each other, the screw shaft 102 passes through the through hole in the center of the wedge block 106, and the first end cap 110 is connected to the tube body 109 through a flange to fix the wedge block 106.

[0049] The inclined block 106 has a planar inclined surface 107, and the angle between the planar inclined surface 107 and the axis of the conveying pipe 101 is 45°. A rotary sealing ring is provided between the screw shaft 102 and the inclined block 106 to achieve a rotary sealing connection.

[0050] The inner wall of the conveying pipe 101 is provided with a reverse spiral groove 108, the depth of which is 3mm.

[0051] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clog-resistant screw conveying mechanism, comprising a conveying pipe, a screw shaft disposed within the conveying pipe, and helical blades disposed on the screw shaft, wherein the conveying pipe is provided with an inlet and a radial outlet, characterized in that: An inclined block is provided at the radial discharge port. The inclined block has an inclined surface facing the radial discharge port. Under the action of the inclined surface, the material conveyed in the conveying pipeline is guided to the radial discharge port.

2. The anti-clogging screw conveyor mechanism according to claim 1, characterized in that: The inclined plane is a planar inclined plane, and the angle between the planar inclined plane and the axis of the conveying pipeline is 15°-75°.

3. The anti-clogging screw conveyor mechanism according to claim 1, characterized in that: The inclined plane is a curved inclined plane.

4. The anti-clogging screw conveyor mechanism according to claim 1, characterized in that: The inclined block is installed on the inner wall of the conveying pipeline by welding or bolting.

5. The anti-clogging screw conveyor mechanism according to claim 1, characterized in that: The inner wall of the conveying pipe is provided with a reverse spiral groove.

6. The anti-clogging screw conveyor mechanism according to claim 5, characterized in that: The cross-section of the reverse spiral groove is circular, triangular, rectangular, or trapezoidal.

7. The anti-clogging screw conveyor mechanism according to claim 1, characterized in that: The conveying pipeline includes a pipe body and a first end cap and a second end cap disposed at both ends of the pipe body. A screw shaft is rotatably mounted on the second end cap of the first end cap, and one end of the screw shaft extends out of the first end cap. A slot is provided on the tube body, and a pin is provided on the inclined block. The pin and the slot cooperate with each other. The screw shaft passes through the inclined block, and the inclined block is fixed after the first end cap is fitted with the tube body.

8. The anti-clogging screw conveyor mechanism according to claim 7, characterized in that: The screw shaft and the inclined block are connected in a rotating sealed manner.

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