A twin-screw conveying apparatus

Abstract

The present application relates to spiral conveying technical field, especially a kind of double helix conveying equipment, including, material conveying mechanism, including material conveying barrel, feeding hopper and spiral auger, one end of material conveying barrel is fixedly connected with feeding hopper, two material conveying mechanisms are symmetrically arranged;Fixed mechanism, multiple fixed mechanisms are arrayed along the axis direction of material conveying barrel, and are used for the cooperation and fixation of two material conveying barrels;And, adjusting mechanism is arranged below feeding hopper, including adjusting assembly and base plate;Adjusting assembly includes first toothed plate, first toothed disc, outer shell and second toothed disc, two first toothed plates are separately arranged on the two sides of first toothed disc and are engaged with first toothed disc, two first toothed plates are driven to move towards or opposite by the rotation of first toothed disc, the double helix conveying equipment can meet the synchronous conveying of different materials and the operation of synchronous material feeding to different equipment according to actual process requirement, it is rich in function, can meet the most needs of daily process, and overall practicability is good.

Description

Technical Field

[0001] This invention relates to the field of spiral conveying technology, and more particularly to a double spiral conveying device. Background Technology

[0002] The twin-screw conveyor is a continuous conveying device developed from the single-screw conveyor. It is widely used in industries such as building materials, chemicals, metallurgy, grain processing, and waste treatment. Its basic working principle is as follows: Two spiral shafts with spiral blades are installed in parallel inside the conveying shell. The blades on the two spiral shafts rotate in opposite directions, one left-handed and the other right-handed. During operation, the drive device drives one spiral shaft to rotate through a coupling. The gears at the shaft ends mesh with each other to transmit power to the other spiral shaft, so that the two spirals rotate synchronously in opposite directions. After the material enters the conveying channel from the feed port at the top of the shell, the rotating spiral blades generate a normal thrust on the material. Under the combined action of the material's own weight and the friction force generated with the shell wall, the material does not rotate with the blades, but moves forward along the bottom of the conveying trough under the axial component of the normal thrust of the blades, and is finally discharged from the discharge port. Compared with the single-screw conveyor, the twin-screw structure increases the internal space of the conveying channel and the material carrying capacity. At the same time, the material is alternately circulated between the two spiral blades, which also has a certain mixing and stirring effect. For example, existing published documents CN102848596A-Double Helix Conveying and Pressing Integrated Machine and CN203255673U-Double Tube Helix Feeder both disclose a double helix conveying device. Although the above-mentioned conveying devices can realize the daily material conveying, they still have the following shortcomings in actual use: 1. Although existing double-helix conveyor equipment can effectively transport materials, it still has many impracticalities in actual use. For example, it cannot achieve synchronous transport of different materials (mainly the addition of different raw materials), nor can it transport the same material to different equipment, resulting in poor overall practicality of the conveyor equipment. 2. Existing double helix conveyor equipment also has a design with two independent flow channels to realize the conveying of materials to different equipment. However, because existing double helix conveyor equipment generally uses a unified drive device in conjunction with a linkage mechanism to achieve synchronous operation, this design method cannot realize the effective conveying of different materials in proportion, and the overall practical scope is still relatively narrow. Therefore, it is necessary to improve the existing technology to solve the above-mentioned technical problems. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] Given that the existing double-helix conveyor equipment has a relatively simple function and cannot achieve synchronous conveying of different materials or conveying the same material to different equipment, a new double-helix conveyor equipment is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-helix conveying device, comprising: a conveying mechanism including a conveying cylinder, a feeding hopper, and a spiral auger, one end of the conveying cylinder being fixedly connected to the feeding hopper, and the two conveying mechanisms being symmetrically arranged; a fixing mechanism, wherein multiple fixing mechanisms are arranged in an array along the axial direction of the conveying cylinder and are used for cooperating and fixing the two conveying cylinders; and an adjusting mechanism disposed below the feeding hopper, including an adjusting component and a base plate; the adjusting component includes a first toothed plate, a first toothed disc, an outer protective shell, and a second toothed disc, the two first toothed plates being respectively disposed on the first toothed disc. The first toothed plate is connected to the two sides of the first toothed plate and meshes with the first toothed plate. The rotation of the first toothed plate drives the two first toothed plates to move towards or away from each other, so as to adjust the distance between the two conveying cylinders. A connecting column is slidably sleeved on one end of the first toothed plate. The lower end of the connecting column is fixed with the second toothed plate, and the two connecting columns are respectively fixed on the bottom surface of the two feeding hoppers. The two sides of the first toothed plate are respectively provided with second toothed plates for meshing with the two second toothed plates. The angle between the two conveying cylinders is adjusted after the distance between the two conveying cylinders is adjusted.

[0006] The beneficial effects of this invention are as follows: When the two conveying mechanisms of this double-helix conveyor are used, the two feeding hoppers form a whole when they come together. The operator only needs to continuously add materials to the two feeding hoppers to achieve synchronous material conveying by the two conveying mechanisms, thereby improving the material conveying capacity. When the first toothed disc rotates and causes the two first toothed plates to move in opposite directions, it will drive the two conveying mechanisms to move in opposite directions. After the second toothed disc on the conveying mechanism moves to the second toothed plate, as the conveying mechanism continues to move, the conveying mechanism will rotate around the second toothed disc as an axis, thereby adjusting the included angle between the two conveying mechanisms. Through the combination of the above adjustments, the two conveying mechanisms can achieve synchronous conveying of different materials, and can also achieve synchronous material conveying to different equipment by the two conveying mechanisms, effectively improving the function of the conveying equipment.

[0007] In a preferred embodiment of the double helix conveying device of the present invention, an output shaft is fixedly provided on the bottom surface of the first toothed disc, and the lower end of the output shaft is fitted into the output end of the second motor, which is fixedly connected to the base plate.

[0008] In a preferred embodiment of the double helix conveying device of the present invention, the outer shell and the output shaft are rotatably connected by rolling bearings, and the outer shell is fixedly connected to the base plate by bolts. A slide rail groove is provided on the bottom surface of the first toothed plate along the long side direction. A limit plate is fitted in the slide rail groove with a clearance, and the limit plate is fixedly connected to the outer shell. The end of the second toothed plate away from the first toothed plate is fixedly connected to the base plate by a support rod.

[0009] In view of the problem that existing conveying equipment cannot effectively convey different materials in proportion, the present invention provides a further optimized and improved double spiral conveying device, wherein: a rotating rod is provided in the conveying cylinder along the axial direction, and one end of the rotating rod extends through the feeding hopper to the outside of the feeding hopper and is fitted into the output end of the reducer. The reducer is fixedly connected to the outer wall of the feeding hopper, and the input end of the reducer is connected to the output end of the first motor; the spiral auger is fixedly sleeved on the outer wall of the rotating rod.

[0010] In a preferred embodiment of the double-helix conveying device of the present invention, the two ends of the rotating rod are rotatably connected to the first end plate and the second end plate respectively through rolling bearings. The first end plate is fixedly connected to one end of the conveying cylinder, while the second end plate is fixedly connected to the feeding hopper. A discharge cylinder is fixedly provided on the bottom surface of the end of the conveying cylinder away from the feeding hopper.

[0011] Another beneficial effect of the present invention is that when the double helix conveying equipment is in use, each conveying mechanism is independently equipped with a spiral auger, and each spiral auger is also equipped with a first motor as an output power source. In this way, even when the two conveying mechanisms are separated and independent, different materials can be conveyed in proportion. The overall practicality is good, and it can be used to convey materials according to process requirements, thus effectively improving the application scenarios of the equipment.

[0012] In a preferred embodiment of the double-helix conveying device of the present invention, a connecting rod is fixedly provided on the bottom surface of the feeding hopper near the conveying cylinder, and a universal wheel is fixedly provided on the bottom surface of the connecting rod.

[0013] As a preferred embodiment of the double helix conveying device of the present invention, wherein: guide plates arranged along the moving trajectory of the conveying cylinder are fixed on the top surface of the base plate on both sides of the universal wheel, and guide grooves are provided on the guide plates; a limiting post inserted into the guide groove is fixed on the outer shell of the universal wheel.

[0014] In a preferred embodiment of the double-helix conveying device of the present invention, the fixing mechanism includes two symmetrically arranged limiting hoops. The limiting hoops are formed by two fixing hoops symmetrically sleeved on the outside of the conveying cylinder. One side of one of the fixing hoops of the same limiting hoop is fixed with an extension tongue, and the other fixing hoop has a fitting groove on one side. The fixing hoop at the fitting groove has an inner textured blind hole. The extension tongue and the fitting groove on the two limiting hoops in the same fixing mechanism fit together with each other, and the inner textured blind hole and the extension tongue are fixed together by bolts.

[0015] In a preferred embodiment of the double-helix conveying device of the present invention, two fixing hoops in the same limiting hoop are fixed on one side by bolts, while two fixing hoops on the other side of the limiting hoop are respectively provided with mutually cooperating U-shaped grooves and rectangular blocks. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of a double-helix conveyor.

[0017] Figure 2 For the present invention Figure 1 Right view of the structure.

[0018] Figure 3 For the present invention Figure 1 A cross-sectional view of the structure in the horizontal direction.

[0019] Figure 4 This is a horizontal cross-sectional view of the adjusting mechanism at the first toothed disc in this invention.

[0020] Figure 5 This is a horizontal cross-sectional view of the adjusting mechanism at the second gear plate in this invention.

[0021] Figure 6 This is a schematic diagram showing the cooperation between the material conveying mechanism, the second gear plate, and the universal wheel in this invention.

[0022] Figure 7 This is a schematic diagram showing the cooperation between the adjustment component and the base plate in this invention.

[0023] Figure 8 This is an exploded view of the fixing mechanism in this invention.

[0024] The attached diagram lists the components represented by each number as follows: 100. Conveying mechanism; 200. Fixing mechanism; 300. Adjusting mechanism; 101. Conveying cylinder; 102. Feeding hopper; 103. Spiral auger; 201. Fixing hoop; 202. U-shaped groove; 203. Rectangular block; 204. Outer tongue; 205. Internal textured blind hole; 301. Adjusting assembly; 302. Base plate; 303. Caster wheel; 101a. First end plate; 101b. Discharge cylinder; 102a. Second end plate; 103a. Rotating rod; 103b. Reducer; 103b-1, First motor; 301a, First gear plate; 301b, First gear disc; 301c, Outer housing; 301d, Second gear disc; 301a-1, Slide rail groove; 301b-1, Output shaft; 301b-2, Second motor; 301c-1, Limiting plate; 301d-1, Connecting post; 302a, Guide plate; 302b, Second gear plate; 302b-1, Support rod; 302a-1, Guide groove; 303a, Connecting rod; 303b, Limiting post. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] 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 phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example 1

[0029] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4This is the first embodiment of the present invention. This embodiment provides a double helix conveying device. When the conveying device is in use, the conveying mechanism 100 is used to convey materials, the fixing mechanism 200 is used to fix the two conveying mechanisms 100 together, and the adjusting mechanism 300 is used to control the two conveying mechanisms 100 to adjust the distance and angle according to the actual conveying requirements.

[0030] Specifically, it includes a material conveying mechanism 100, comprising a material conveying cylinder 101, a feeding hopper 102, and a spiral auger 103, with one end of the material conveying cylinder 101 fixedly connected to the feeding hopper 102, and the two material conveying mechanisms 100 being arranged symmetrically; a fixing mechanism 200, wherein multiple fixing mechanisms 200 are arranged in an array along the axial direction of the material conveying cylinder 101 and are used for cooperating and fixing the two material conveying cylinders 101; and an adjusting mechanism 300 disposed below the feeding hopper 102, comprising an adjusting component 301 and a base plate 302.

[0031] See details Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the adjustment assembly 301 includes a first toothed plate 301a, a first toothed disc 301b, an outer protective shell 301c, and a second toothed disc 301d. The two first toothed plates 301a are respectively disposed on both sides of the first toothed disc 301b and mesh with it. An output shaft 301b-1 is fixedly mounted on the bottom surface of the first toothed disc 301b, and the lower end of the output shaft 301b-1 is embedded in the output end of a second motor 301b-2. The second motor 301b-2 is fixedly connected to the base plate 302. The rotation of the first toothed disc 301b drives the two first toothed plates 301a to move in opposite directions, thereby achieving the adjustment of the two... Adjustment of the spacing between the conveying cylinders 101: A connecting post 301d-1 is slidably sleeved at one end of the first toothed plate 301a. A second toothed disc 301d is fixed at the lower end of the connecting post 301d-1. The two connecting posts 301d-1 are respectively fixed on the bottom surfaces of the two feeding hoppers 102. The two sides of the first toothed disc 301b are respectively provided with second toothed plates 302b for meshing with the two second toothed discs 301d. By the synchronous meshing of the two second toothed discs 301d with the two second toothed plates 302b, the angle between the two conveying cylinders 101 can be adjusted after the spacing between the two conveying cylinders 101 is adjusted. The outer casing 301c and the output shaft 301b-1 are rotatably connected by a rolling bearing, and the outer casing 301c is fixedly connected to the base plate 302 by bolts. A slide rail groove 301a-1 is provided on the bottom surface of the first toothed plate 301a along the long side direction. A limit plate 301c-1 is fitted in the slide rail groove 301a-1 with a clearance, and the limit plate 301c-1 is fixedly connected to the outer casing 301c, so as to realize the limiting and guiding of the movement of the first toothed plate 301a. The end of the second toothed plate 302b away from the first toothed plate 301b is fixedly connected to the base plate 302 by a support rod 302b-1. In use, after the fixing mechanism 200 is opened to limit and fix the conveying mechanism 100, the first gear disk 301b is rotated by the operation of the second motor 301b-2. Because the first gear disk 301b and the two first gear plates 301a are synchronously meshed, the rotation of the first gear disk 301b causes the first gear plates 301a to move in opposite directions via the connecting column 301d-1, thus adjusting the distance between the two conveying mechanisms 100. The process can still realize independent material feeding of the two material feeding mechanisms 100 as needed. When the second toothed disc 301d on the connecting column 301d-1 moves to the second toothed plate 302b, as the first toothed plate 301a continues to move, the meshing between the second toothed disc 301d and the second toothed plate 302b can realize the rotation of the material feeding mechanism 100 around the connecting column 301d-1. In this way, the angle can be adjusted after the two material feeding mechanisms 100 maintain a certain distance, so as to facilitate the use of more complex working conditions.

[0032] Additionally, it should be noted that, in order for this device to perform material lifting and conveying in actual use, a vertically adjustable drive device can be installed at the bottom of the base plate 302 as needed. Example 2

[0033] Reference Figure 1 , Figure 2 and Figure 3 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, in order to better implement the present invention, the structure of the material conveying mechanism 100 in the present invention is described in detail.

[0034] Specifically, a rotating rod 103a is provided in the conveying cylinder 101 along the axial direction, and one end of the rotating rod 103a extends through the feeding hopper 102 to the outside of the feeding hopper 102 and is fitted into the output end of the reducer 103b. The reducer 103b is fixedly connected to the outer wall of the feeding hopper 102, and the input end of the reducer 103b is connected to the output end of the first motor 103b-1; the auger 103 is fixedly sleeved on the outer wall of the rotating rod 103a. The two ends of the rotating rod 103a are rotatably connected to the first end plate 101a and the second end plate 102a respectively through rolling bearings. The first end plate 101a is fixedly connected to one end of the conveying cylinder 101, while the second end plate 102a is fixedly connected to the feeding hopper 102. The discharge cylinder 101b is fixedly provided on the bottom surface of the end of the conveying cylinder 101 away from the feeding hopper 102. In use, the above-mentioned setup utilizes the operation of the first motor 103b-1 in conjunction with the reduction gear 103b to rotate the rotating rod 103a. The rotation of the rotating rod 103a then rotates the auger 103. Under the rotation of the auger 103, materials can be fed into the equipment through the conveying cylinder 101 after being added to the feeding hopper 102. Each auger 103 in the conveying cylinder 101 is driven by an independent first motor 103b-1, thereby achieving independent material conveying according to process requirements. Example 3

[0035] Reference Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that in order to improve the stability of the cooperation between the adjustment mechanism 300 and the material conveying mechanism 100, and to avoid damage caused by the heavy load on the adjustment mechanism 300, thereby reducing the service life of the entire equipment, this embodiment is proposed.

[0036] Specifically, a connecting rod 303a is fixedly provided on the bottom surface of the feeding hopper 102 near the conveying cylinder 101, and a caster wheel 303 is fixedly provided on the bottom surface of the connecting rod 303a; guide plates 302a arranged along the moving trajectory of the conveying cylinder 101 are fixedly provided on the top surface of the base plate 302 on both sides of the caster wheel 303, and guide grooves 302a-1 are provided on the guide plates 302a; a limiting post 303b that is inserted into the guide groove 302a-1 is fixedly provided on the outer shell of the caster wheel 303. When the material conveying cylinder 101 is adjusted in position as needed, the connecting rod 303a will also drive the caster wheel 303 to roll on the base plate 302 to assist the material conveying cylinder 101 to move better. The limiting post 303b on the caster wheel 303 and the guide groove 302a-1 are configured to limit the movement of the caster wheel 303 when it moves, and to achieve the matching and limiting between the caster wheel 303 and the guide plate 302a. Example 4

[0037] Reference Figure 1 , Figure 2 and Figure 8This is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, in order to better implement the present invention, the specific structure of the fixing mechanism 200 in the present invention is described in detail.

[0038] Specifically, the fixing mechanism 200 includes two symmetrically arranged limiting clamps. The limiting clamps are formed by two fixing clamps 201 symmetrically sleeved on the outside of the conveying cylinder 101. One of the fixing clamps 201 has an extended tongue 204 fixed on one side, and the other fixing clamp 201 has a fitting groove on one side. The fixing clamp 201 at the fitting groove has an inner textured blind hole 205. The extended tongue 204 and the fitting groove on the two limiting clamps in the same fixing mechanism 200 fit together and are fixed by bolts to achieve the cooperation between the inner textured blind hole 205 and the extended tongue 204. After the bolts are loosened by tools, the cooperation between the extended tongue 204 and the inner textured blind hole 205 is released, and the two limiting clamps are in a separated state. This allows free movement between the two conveying cylinders 101. The limiting clamps sleeved on the outside of the conveying cylinder 101 can also achieve synchronous movement.

[0039] Furthermore, the two fixing hoops 201 in the same limiting hoop are fixed on one side by bolts, while the two fixing hoops 201 on the other side of the limiting hoop are respectively provided with U-shaped grooves 202 and rectangular blocks 203 that cooperate with each other, so that the two fixing hoops 201 can be freely disassembled on the conveying cylinder 101.

[0040] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0041] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the particular embodiments but extends to a variety of modifications that still fall within the scope of the appended claims.

[0042] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0043] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A double-helix conveyor device, comprising, The material conveying mechanism (100) includes a material conveying cylinder (101), a feeding hopper (102) and a spiral auger (103). One end of the material conveying cylinder (101) is fixedly connected to the feeding hopper (102), and the two material conveying mechanisms (100) are arranged symmetrically. A fixing mechanism (200), wherein a plurality of said fixing mechanisms (200) are arranged in an array along the axial direction of the conveying cylinders (101) and are used for the mating and fixing of the two conveying cylinders (101); and, An adjustment mechanism (300) located below the feeding hopper (102) includes an adjustment component (301) and a base plate (302). Its features are: The adjusting assembly (301) includes a first toothed plate (301a), a first toothed disc (301b), an outer shell (301c), and a second toothed disc (301d). The two first toothed plates (301a) are respectively disposed on both sides of the first toothed disc (301b) and mesh with the first toothed disc (301b). The rotation of the first toothed disc (301b) drives the two first toothed plates (301a) to move towards or away from each other, thereby adjusting the distance between the two conveying cylinders (101). A connecting post (301d-1) is slidably sleeved at one end of the first toothed plate (301a). The lower end of the connecting column (301d-1) is fixed with a second toothed disc (301d), and the two connecting columns (301d-1) are respectively fixed on the bottom surface of the two feeding hoppers (102). The two sides of the first toothed disc (301b) are respectively provided with second toothed plates (302b) for meshing with the two second toothed discs (301d). By the synchronous meshing of the two second toothed discs (301d) with the two second toothed plates (302b), the angle between the two feeding cylinders (101) can be adjusted after the distance between the two feeding cylinders (101) is adjusted.

2. The double-helix conveying device as described in claim 1, characterized in that: The bottom surface of the first gear plate (301b) is fixedly provided with an output shaft (301b-1), and the lower end of the output shaft (301b-1) is fitted into the output end of the second motor (301b-2), which is fixedly connected to the base plate (302).

3. The double-helix conveying device as described in claim 2, characterized in that: The outer casing (301c) and the output shaft (301b-1) are rotatably connected by a rolling bearing, and the outer casing (301c) is fixedly connected to the base plate (302) by bolts. A slide rail groove (301a-1) is provided on the bottom surface of the first toothed plate (301a) along the long side direction. A limit plate (301c-1) is fitted in the slide rail groove (301a-1) with clearance, and the limit plate (301c-1) is fixedly connected to the outer casing (301c). The end of the second toothed plate (302b) away from the first toothed disc (301b) is fixedly connected to the base plate (302) via a support rod (302b-1).

4. A double-helix conveying device as described in claim 1 or 3, characterized in that: A rotating rod (103a) is provided in the feeding cylinder (101) along the axial direction, and one end of the rotating rod (103a) extends through the feeding hopper (102) to the outside of the feeding hopper (102) and is fitted into the output end of the reducer (103b). The reducer (103b) is fixedly connected to the outer wall of the feeding hopper (102), and the input end of the reducer (103b) is connected to the output end of the first motor (103b-1). The spiral auger (103) is fixedly sleeved on the outer wall of the rotating rod (103a).

5. A double-helix conveying device as described in claim 4, characterized in that: The two ends of the rotating rod (103a) are rotatably connected to the first end plate (101a) and the second end plate (102a) through rolling bearings, respectively. The first end plate (101a) is fixedly connected to one end of the conveying cylinder (101), while the second end plate (102a) is fixedly connected to the feeding hopper (102). The discharge cylinder (101b) is fixedly provided on the bottom surface of the conveying cylinder (101) away from the feeding hopper (102).

6. A double-helix conveying device as described in claim 4, characterized in that: A connecting rod (303a) is fixed on the bottom surface of the feeding hopper (102) near the conveying cylinder (101), and a caster wheel (303) is fixed on the bottom surface of the connecting rod (303a).

7. A double-helix conveying device as described in claim 6, characterized in that: The top surface of the base plate (302) on both sides of the universal wheel (303) is fixed with a guide plate (302a) arranged along the moving trajectory of the conveyor cylinder (101), and a guide groove (302a-1) is provided on the guide plate (302a). The omnidirectional wheel (303) has a limiting post (303b) fixed on its outer shell, which is inserted into the guide groove (302a-1).

8. A double-helix conveying device as described in claim 7, characterized in that: The fixing mechanism (200) includes two symmetrically arranged limiting hoops. The limiting hoops are formed by two fixing hoops (201) symmetrically sleeved on the outside of the conveying cylinder (101). One of the fixing hoops (201) of the same limiting hoops has an extension tongue (204) fixed on one side, and the other fixing hoops (201) has a fitting groove on one side. The fixing hoops (201) at the fitting groove has an inner texture blind hole (205). The outer tongue (204) and the fitting groove on the two limiting hoops in the same fixing mechanism (200) fit together and are fixed by bolts to achieve the matching of the inner blind hole (205) and the outer tongue (204).

9. A double-helix conveying device as described in claim 8, characterized in that: Two fixing hoops (201) in the same limiting hoop are fixed on one side by bolts, while two fixing hoops (201) on the other side of the limiting hoop are respectively provided with U-shaped grooves (202) and rectangular blocks (203) that cooperate with each other.

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