Connecting piece, screw rod group and screw conveying device

Abstract

The utility model relates to the technical field of material conveying equipment, and discloses a connecting piece, a screw rod set and a screw conveying device.The connecting piece comprises a middle shaft, the two ends of the middle shaft are respectively provided with a connecting part extending outwards in the axis direction of the middle shaft, and each connecting part is provided with at least one set of outwards-protruding cambered surface section and plane section which are sequentially arranged in the circumferential direction of the connecting part; the adjacent end parts of the two rotating pieces are respectively provided with a concave cavity for the insertion of the connecting part, and a locking piece which extends along the radial direction is arranged between the connecting part and the rotating piece and is used for locking and fixing the connecting part and the rotating piece; compared with a flange connecting structure adopted in the prior art, the connecting piece provided by the utility model can effectively prevent the problem of transmission failure caused by bolt looseness or fracture; the connecting piece provided by the utility model has the advantage of reliable connecting effect, and the maintenance cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying equipment, in particular to a connecting piece, a screw rod group and a screw conveying device having the connecting piece. Background Art

[0002] A screw conveyor is a mechanical device that uses a motor to drive the screw to rotate and push materials to achieve material conveying. It can convey materials horizontally, obliquely, or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing, easy operation, and convenient closed material conveying. When conveying long distances, two or more screw augers are often required to be connected in pairs. Currently, screw augers are mostly connected in pairs using flanges. In actual use, this connection method is prone to loosening or breaking bolts, resulting in transmission failure, seriously affecting material conveying efficiency. Utility Model Content

[0003] One purpose of the present invention is to solve the problem that adjacent rotating parts connected by flanges are easily prone to transmission failure due to loosening or breaking of bolts, and to provide a connecting part that has the advantage of reliable connection and can effectively avoid the problem of transmission failure between adjacent rotating parts.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a connecting member for the coaxial connection of two rotating members, the connecting member includes an intermediate shaft, and both ends of the intermediate shaft are respectively provided with connecting parts extending outward along its axial direction, the connecting part has at least one group of convex arc surface segments and plane segments arranged in sequence along its circumference, the adjacent ends of the two rotating members are respectively provided with concave cavities for the connecting parts to be inserted, and a locking member extending radially is provided between the connecting part and the rotating member for locking and fixing the two.

[0005] Preferably, two groups of convex arc surface segments and plane segments are sequentially arranged in the circumferential direction of the connecting portion, and the two groups of convex arc surface segments and the two groups of plane segments are symmetrically arranged.

[0006] Preferably, the concave cavity of the rotating member is a cylindrical cavity, a ferrule is provided in the cylindrical cavity, and the connecting portion is configured to be able to be inserted into the ferrule.

[0007] The utility model also provides a spiral rod group, which includes a plurality of sub-spiral rods coaxially connected, and two adjacent sub-spiral rods are coaxially connected through the above-mentioned connecting piece.

[0008] Preferably, at least two of the plurality of sub-spiral rods have the same length.

[0009] The utility model also provides a screw conveying device, including a screw rod group and a power unit, wherein the power unit is configured to drive the screw rod group to rotate around its own axis, and the screw rod group includes a plurality of sub-screw rods coaxially connected, and two adjacent sub-screw rods are coaxially connected through the above-mentioned connecting piece.

[0010] Preferably, the screw conveying device also includes a feed pipe, which has a feed port and a discharge port formed at both ends respectively. The screw rod group is rotatably arranged in the tube cavity of the feed pipe, and can push the material input into the feed port to the discharge port along the length direction of the feed pipe when rotating around its own axis.

[0011] Preferably, a feeding hopper is provided at the feed inlet of the feed pipe.

[0012] Preferably, a discharge pipe is provided at the discharge port of the conveying pipe.

[0013] Preferably, the spiral conveying device further comprises a support frame, the support frame is used to support the conveying pipe, and a roller is provided at the bottom of the support frame.

[0014] When the connector provided by the present invention coaxially connects two rotating members, the connecting portions at each end of the intermediate shaft can be inserted into the concave cavities at the adjacent ends of the two rotating members, and then the two are locked and fixed using the locking members between the connecting portions and the rotating members. Compared with the flange connection structure used in the prior art, the connector provided by the present invention can effectively prevent transmission failure caused by loose or broken bolts. The connector provided by the present invention has the advantage of reliable connection and effectively reduces maintenance costs.

[0015] According to the connecting piece provided by the utility model, the connecting portion located at both ends of the intermediate shaft has at least one group of convex arc surface segments and plane segments arranged in sequence along its circumference. The inventors of the present application have found in practice that, compared with the connecting portion with a square design, the convex arc surface segment of the connecting portion of the utility model can cooperate with the inner side surface of the concave cavity, which not only has the function of guiding and supporting, but also can effectively prevent the connecting portion from moving in the radial direction of the rotating part; the plane segment of the connecting portion can cooperate with the inner side surface of the concave cavity to realize reliable transmission of torque between rotating parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a connecting piece provided by the present invention for connecting two rotating pieces;

[0017] Figure 2 It is a cross-sectional view of three different connecting parts provided by the utility model;

[0018] Figure 3This is a cross-sectional schematic diagram of a connecting part of a connecting member provided by the present invention being inserted into the end of a rotating member;

[0019] Figure 4 yes Figure 3 A cross-sectional schematic diagram of another position when the connecting portion in FIG. 1 is inserted into the end of the rotating member;

[0020] Figure 5 This is a cross-sectional schematic diagram of another connecting member provided by the present invention, in which the connecting portion is inserted into the end of the rotating member;

[0021] Figure 6 This is a structural diagram of a spiral rod group provided by the utility model;

[0022] Figure 7 yes Figure 6 A magnified schematic diagram of position A in the middle;

[0023] Figure 8 It is a structural schematic diagram of a spiral conveying device provided by the utility model.

[0024] Description of Reference Numerals

[0025] 100, rotating part; 101, concave cavity; 200, intermediate shaft; 210, connecting part; 211, convex arc surface segment; 212, flat segment; 220, locking part; 300, ferrule; 400, screw rod assembly; 410, sub-screw rod; 500, power unit; 510, drive motor; 520, reducer; 600, feed pipe; 610, feed port; 620, discharge port; 700, feeding hopper; 800, discharge pipe; 900, support frame; 910, roller. DETAILED DESCRIPTION

[0026] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0027] like Figure 1 As shown, the utility model provides a connecting member for the coaxial connection of two rotating members 100, the connecting member includes an intermediate shaft 200, and both ends of the intermediate shaft 200 are respectively provided with connecting portions 210 extending outward along its axial direction, the connecting portion 210 has at least one group of convex arc segments 211 and flat segments 212 arranged in sequence along its circumference, the adjacent ends of the two rotating members 100 are respectively provided with concave cavities 101 for the connecting portions 210 to be inserted, and a locking member 220 extending radially is provided between the connecting portion 210 and the rotating member 100 for locking and fixing the two.

[0028] After the two rotating members 100 are coaxially connected by the connecting member provided by the present invention, the rotational power can be transmitted from one of the rotating members 100 to the other rotating member 100, thereby achieving synchronous rotation of the two rotating members 100.

[0029] When two rotating members 100 are coaxially connected by the connecting member provided by the utility model, the connecting parts 210 at both ends of the intermediate shaft 200 can be respectively inserted into the concave cavities 101 at the adjacent ends of the two rotating members 100, and then the two are locked and fixed by the locking member 220 between the connecting part 210 and the rotating member 100. Compared with the flange connection structure adopted in the prior art, the connecting member provided by the utility model can effectively prevent the transmission failure problem caused by loosening or breaking of the bolts; the connecting member provided by the utility model has the advantage of reliable connection effect, which effectively reduces the maintenance cost.

[0030] Furthermore, according to the connecting piece provided by the present invention, the connecting portion 210 located at both ends of the intermediate shaft 200 has at least one group of convex arc surface segments 211 and plane segments 212 arranged in sequence along its circumference. The inventors of the present application found in practice that compared with the connecting portion 210 with a square design, the convex arc surface segment 211 of the connecting portion 210 of the present invention can cooperate with the inner side surface of the concave cavity 101, which not only has the function of guiding and supporting, but also can effectively prevent the connecting portion 210 from moving in the radial direction of the rotating part 100; the plane segment 212 of the connecting portion 210 can cooperate with the inner side surface of the concave cavity 101 to realize reliable transmission of torque between the rotating parts 100.

[0031] In the present invention, the locking member 220 is used to lock and fix the connecting portion 210 and the rotating member 100 together. In some embodiments of the present invention, the locking member 220 is a bolt.

[0032] In order to ensure the reliability of locking and fixing, the locking member 220 can be provided in multiple numbers, for example, two, and the two locking members 220 are spaced apart along the length direction of the rotating member 100, preferably at an angle in the circumferential direction of the rotating member 100, for example, at 90 degrees. In a specific embodiment of the present invention, combined with Figure 3 and Figure 4 In the illustrated solution, two locking members 220 are provided, and the two locking members 220 respectively penetrate the oppositely disposed convex arc surface segments 211 and the oppositely disposed flat surface segments 212 .

[0033] It is understandable that in the present invention, the number of the convex arc segments 211 and the flat segments 212 on the circumference of the connecting portion 210 can be adaptively selected according to actual conditions, such as Figure 2The cross-sectional views of the connection parts 210 of the present invention are three different structures, which are respectively two, three and four groups of convex arc surface segments 211 and flat surface segments 212 arranged in sequence from left to right.

[0034] As preferably, Figure 2 As shown in the leftmost structure, the connecting portion 210 is circumferentially provided with two sets of convex arc segments 211 and flat segments 212, symmetrically arranged. This arrangement simplifies the molding process of the connecting portion 210 and effectively prevents radial movement of the connecting portion 210 relative to the rotating member 100 while ensuring reliable torque transmission.

[0035] Combine Figure 5 The figure shows a schematic structural diagram in which the cross-sectional profile of the cavity 101 is consistent with the cross-sectional profile of the connecting portion 210 . At this time, the connecting portion 210 can be seamlessly inserted into the cavity 101 to ensure reliable transmission of torque.

[0036] In some embodiments, combined Figure 3 and Figure 4 As shown, the concave cavity 101 of the rotating member 100 is a cylindrical cavity, and a ferrule 300 is provided in the cylindrical cavity, and the connecting portion 210 is configured to be inserted into the ferrule 300. It is understood that the cross-sectional profile of the ferrule 300 provided in the cylindrical cavity is consistent with the cross-sectional profile of the connecting portion 210, so that the connecting portion 210 can be seamlessly inserted into the ferrule 300. By providing the ferrule 300 in the concave cavity 101 of the rotating member 100 to adapt to the connecting portion 210, not only is manufacturing convenient, but also the plug-in fit effect of the connecting portion 210 and the rotating member 100 can be ensured. It is understandable that in the embodiment of the present utility model, the ferrule 300 can be provided in the concave cavity 101 at the end of the rotating member 100 in any appropriate form. For example, the ferrule 300 is welded and fixed to the concave cavity 101 at the end of the rotating member 100.

[0037] It should be noted that although the subsequent description will mainly use the connecting parts used in the screw rod group 400 and the screw conveying device as an example to explain the structure and principle, the connecting parts provided by the present invention can also be used in other occasions to achieve coaxial connection of two rotating parts 100.

[0038] Combine Figure 6 and Figure 7 As shown, the present invention further provides a spiral rod assembly 400 , which includes a plurality of sub-spiral rods 410 coaxially connected, and two adjacent sub-spiral rods 410 are coaxially connected via the above-mentioned connecting piece.

[0039] It is understandable that when two adjacent sub-spiral rods 410 are coaxially connected through the connecting piece provided by the present invention, the sub-spiral rod 410 is the aforementioned rotating piece 100, and a concave cavity 101 is also provided at the end of the sub-spiral rod 410 for the connecting part 210 to be inserted.

[0040] It should be noted that when a sub-screw rod 410 that is too long rotates around its own axis, its axial direction is easily deformed. At the same time, due to the large torque, the spiral is easily broken in the middle. The vertical pressure exerted by the material on the spiral and the spiral's own gravity cause the middle deformation of the spiral to be not on the same horizontal line, which accelerates the wear of the spiral blades and causes wear on the outer shell, thereby shortening the service life of the screw conveyor. Therefore, the field often adopts a method of coaxially connecting several sub-screw rods 410 to meet the requirements of the conveying distance. At present, the connection between adjacent sub-screw rods 410 mostly adopts a flange type. This connection method is prone to loosening or breaking of bolts in actual use, resulting in transmission failure. The connector provided by the utility model can effectively prevent the occurrence of the above-mentioned problems.

[0041] The inventors found that when a flange is used to coaxially connect two adjacent sub-spiral rods 410, the bolts that play a connecting role extend along the axial direction of the sub-spiral rod 410, and the bolts will directly bear the torque. After a period of use, the bolts may become loose or even break, resulting in transmission failure. In the connecting piece provided by the present invention, a radially extending locking piece 220 is provided between the connecting part 210 and the sub-spiral rod 410 for locking and fixing the two. This design can convert the shear force transmission of the locking piece 220 into shaft end face transmission, thereby avoiding the locking piece 220 from becoming loose or even breaking due to force during use; in addition, based on the connecting piece provided by the present invention, when the spiral rod group 400 is in use, when the bearing is worn, the spiral rod group 400 will bend downward under the action of its own weight, and the connecting piece of the present invention and the shaft head are slidably connected, and the bending shape can be adjusted by itself.

[0042] In some embodiments, at least two of the plurality of sub-spirals 410 are of equal length. That is, at least two sub-spirals 410 in the spiral rod assembly 400 are of equal length. It should be noted that "length" herein refers to the axial length of the sub-spiral rod 410. This arrangement improves the interchangeability of the sub-spirals 410, reduces the number of parts in inventory, and thus reduces component costs.

[0043] Combine Figure 8As shown, the utility model also provides a screw conveying device, including a screw rod group 400 and a power unit 500, wherein the power unit 500 is configured to drive the screw rod group 400 to rotate around its own axis, and the screw rod group 400 includes a plurality of sub-screw rods 410 coaxially connected, and two adjacent sub-screw rods 410 are coaxially connected through the above-mentioned connecting piece.

[0044] In the present invention, the bolt conveying device including the above-mentioned connecting piece can effectively prevent the problem of loosening or breaking of bolts between adjacent sub-spiral rods 410 in the existing spiral conveying device due to the flange connection structure, thereby causing transmission failure; by applying the connecting piece provided by the present invention in the bolt conveying device, the reliable transmission of torque is ensured and the maintenance cost of the equipment is reduced.

[0045] In the present invention, the power unit 500 can be of any appropriate structural form, as long as it can provide power to drive the screw rod group 400 to rotate around its own axis. Figure 8 As shown, the power unit 500 includes a drive motor 510 and a reducer 520; the power output end of the drive motor 510 is connected to the input end of the reducer 520, and the output end of the reducer 520 is in transmission connection with the screw assembly 400. For example, one end of the screw assembly 400 is plugged into and mated with the output end of the reducer 520 and secured by a key lock, and supported by a bearing. The power provided by the drive motor 510 can be provided to the screw assembly 400 through the reducer 520, causing the screw assembly 400 to rotate about its own axis, thereby pushing the material along the length of the screw assembly 400.

[0046] In the present invention, the spiral conveying device also includes a feed pipe 600, and a feed port 610 and a discharge port 620 are respectively formed at both ends of the feed pipe 600. The spiral rod group 400 is rotatably arranged in the tube cavity of the feed pipe 600, and can push the material input into the feed port 610 along the length direction of the feed pipe 600 to the discharge port 620 when rotating around its own axis.

[0047] In the present invention, a hopper 700 is provided at the feed inlet 610 of the conveying pipe 600. During use, the material to be conveyed is added to the feed inlet 610 through the hopper 700. It is understood that the provision of the hopper 700 can prevent material leakage during the addition process, ensuring that all material to be conveyed is added to the conveying pipe 600 through the feed inlet 610. Preferably, the end of the hopper 700 away from the feed inlet 610 is configured to be flared.

[0048] In the present invention, a discharge pipe 800 is provided at the outlet 620 of the feed pipe 600. The provision of the discharge pipe 800 allows the material discharged from the outlet 620 to be further directed into the container, thereby preventing material leakage. The present invention does not impose any particular restrictions on the configuration of the discharge pipe 800; for example, the discharge pipe 800 may be integrally formed with the feed pipe 600, or manufactured separately and then fixedly connected by welding or other methods.

[0049] In the present invention, the screw conveyor device further includes a support frame 900 for supporting the material delivery pipe 600. A roller 910 is disposed at the bottom of the support frame 900. During use, the support frame 900 with the roller 910 allows the screw conveyor device to be conveniently moved to a desired location for material delivery. It is understood that for ease of use, the roller 910 is preferably equipped with a brake function.

[0050] The advantages of the screw conveying device provided by the present invention are further illustrated below through specific examples.

[0051] The conventional method of feeding into fermentation tanks is to use an overhead crane to lift the material bag to the top of the fermentation tank, and then manually open the bottom of the material bag, and the material in the material bag falls into the fermentation tank under its own weight. However, this feeding method has many drawbacks: there are requirements for the placement of the fermentation tank. If the fermentation tank is placed close to the wall, the overhead crane cannot lift the material bag into place for feeding; the height of the fermentation tank should be relatively low so that the material cannot be lifted and fed due to the tank mouth being too high. In addition, this feeding method requires the cooperation of multiple people, with high labor costs and high labor intensity; and, in actual operation, this feeding method requires manual control of the material bag suspended in the air to ensure that the material in the material bag can fall stably into the fermentation tank. This process has certain safety hazards.

[0052] When feeding a fermentation tank using the screw conveyor device provided by the present invention, the material is simply added to the feeding hopper 700 of the feeding pipe 600. Driven by the power unit 500, the screw assembly 400 rotates about its own axis, pushing the material to the discharge port 620 of the feeding pipe 600 and dropping it into the fermentation tank through the discharge pipe 800. The screw conveyor device provided by the present invention facilitates the feeding of fermentation materials, effectively reduces leakage of fermentation materials, saves labor, and reduces the labor intensity of fermentation material feeding.

[0053] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple variations and combinations should also be considered as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A connecting member for coaxially connecting two rotating members (100), characterized in that: The connecting member comprises an intermediate shaft (200), and both ends of the intermediate shaft (200) are respectively provided with connecting portions (210) extending outwardly along the axial direction thereof, and the connecting portion (210) has at least one group of convex arc segments (211) and flat segments (212) sequentially arranged along its circumference, and adjacent ends of the two rotating members (100) are respectively provided with concave cavities (101) for the connecting portions (210) to be inserted, and a locking member (220) extending in the radial direction is provided between the connecting portion (210) and the rotating member (100) for locking and fixing the two.

2. The connector according to claim 1, wherein: Two groups of convex arc surface segments (211) and plane segments (212) are sequentially arranged on the circumference of the connecting portion (210), and the two groups of convex arc surface segments (211) and the two groups of plane segments (212) are symmetrically arranged.

3. The connector according to claim 1, wherein: The concave cavity (101) of the rotating member (100) is a cylindrical cavity, a ferrule (300) is provided in the cylindrical cavity, and the connecting portion (210) is configured to be inserted into the ferrule (300).

4. A screw rod assembly (400), comprising a plurality of sub-screw rods (410) coaxially connected, characterized in that: Two adjacent sub-spiral rods (410) are coaxially connected via the connecting piece described in any one of claims 1 to 3.

5. The screw rod assembly (400) according to claim 4, characterized in that: At least two of the plurality of sub-spiral rods (410) have the same length.

6. A screw conveying device, characterized in that: The invention comprises a screw rod group (400) and a power unit (500), wherein the power unit (500) is configured to drive the screw rod group (400) to rotate around its own axis, and the screw rod group (400) comprises a plurality of sub-screw rods (410) coaxially connected, and two adjacent sub-screw rods (410) are coaxially connected via a connecting piece according to any one of claims 1 to 3.

7. The screw conveying device according to claim 6, characterized in that: The screw conveying device also includes a conveying pipe (600), and a feed port (610) and a discharge port (620) are respectively formed at both ends of the conveying pipe (600). The screw rod group (400) is rotatably arranged in the tube cavity of the conveying pipe (600) and can push the material input into the feed port (610) along the length direction of the conveying pipe (600) to the discharge port (620) when rotating around its own axis.

8. The screw conveying device according to claim 7, characterized in that: A feeding hopper (700) is provided at the feeding port (610) of the feeding pipe (600).

9. The screw conveying device according to claim 7, characterized in that: A discharge pipe (800) is provided at the discharge port (620) of the conveying pipe (600).

10. The screw conveying device according to claim 7, characterized in that: The screw conveying device further comprises a support frame (900), wherein the support frame (900) is used to support the conveying pipe (600), and a roller (910) is provided at the bottom of the support frame (900).

Images