A gyratory sifter

Abstract

This application relates to the technical field of screening equipment, and proposes a rotary vibrating grading screen, including a frame, a screen box, and a rotary drive component. The screen box is suspended from the frame by several universal joint rods. The rotary drive component is located at the bottom of the screen box. A feed pipe is connected to the top of the screen box, and an extension bracket is connected to the top of the frame. The extension bracket is located above the feed pipe, and a connecting pipe is provided on the extension bracket corresponding to the feed pipe. A telescopic pipe is also connected to the bottom end of the connecting pipe. A first connecting ring and a second connecting ring are coaxially connected to the outer circumference of the telescopic pipe and the feed pipe, respectively. The first connecting ring and the second connecting ring are abutted against each other. The diameter of the telescopic pipe is smaller than the diameter of the feed pipe, and the diameter of the first connecting ring is larger than the diameter of the second connecting ring. This application has the effect of better maintaining a sealed connection between the feed pipe of the screen box and the output end of the upstream equipment.

Description

Technical Field

[0001] This application relates to the technical field of screening equipment, and in particular to a rotary vibrating grading screen. Background Technology

[0002] The rotary vibrating grading screen is a screening device used in the pretreatment process of grain processing raw materials. It is mainly used to remove impurities (separate straw, sand, etc.) and classify the particle size of raw materials.

[0003] In actual operation, the screen box of the vibrating rotary classifier needs to continuously swing to achieve the screening function. At the same time, in order to limit the leakage of raw materials and dust, the feed pipe at the top of the screen box and the output end of the upstream conveying equipment need to be sealed and connected. Currently, the feed pipe at the top of the screen box is connected to the output end of the upstream conveying equipment using a cloth bag tube. The flexibility of the cloth bag tube adapts to the swing of the screen box and achieves a sealed connection between the feed pipe and the output end of the upstream equipment. However, the cloth bag tube is prone to damage due to long-term dragging and stretching, requiring frequent replacement and affecting overall production efficiency. Therefore, there is room for improvement. Utility Model Content

[0004] In order to better seal and connect the feed pipe of the rotary classifier with the output end of the upstream equipment, this application provides a rotary vibrating classifier.

[0005] This application provides a rotary vibrating classifier, which adopts the following technical solution: A rotary vibrating grading screen includes a frame, a screen box, and a rotary drive component. The screen box is suspended from the frame by a number of universal joint rods. The rotary drive component is located at the bottom of the screen box and is used to drive the screen box to reciprocate and swing through the number of universal joint rods. The top of the screen box is connected to a feed pipe, and the top of the frame is connected to an extension bracket. The extension bracket is located above the feed pipe, and the extension bracket is provided with a connecting pipe corresponding to the feed pipe. The connecting pipe is used to connect to the output end of the upstream equipment. The bottom end of the connecting pipe is also connected to a telescopic pipe. The telescopic pipe and the feed pipe are coaxially connected to a first connecting ring and a second connecting ring at their outer peripheries, respectively. The first connecting ring and the second connecting ring are abutted together. The diameter of the telescopic fitting is smaller than the diameter of the feed pipe, and the diameter of the first connecting ring is larger than the diameter of the second connecting ring.

[0006] By adopting the above technical solution, after connecting the connecting pipe of the extension bracket to the output end of the upstream equipment, when the subsequent rotary drive drives the screen box to swing to screen materials, the telescopic pipe fitting, in conjunction with the first and second connecting rings that abut against each other, achieves a sealed connection between the output end of the upstream equipment and the feed pipe of the screen box. This limits the leakage of materials output from the upstream equipment and helps ensure that the materials output from the upstream equipment can stably enter the feed pipe through the connecting pipe. At the same time, the telescopic pipe fitting automatically compensates for the displacement caused by the wear of the first and second connecting rings, ensuring that the first connecting ring always abuts against the second connecting ring. This ensures that the output end of the upstream equipment and the feed pipe of the screen box always maintain a sealed connection. Compared with the traditional bag tube structure, this effectively solves the problem of bag tubes being easily damaged and requiring frequent replacement due to dragging and stretching. By making the diameter of the telescopic pipe fitting smaller than the diameter of the feed pipe and the diameter of the first connecting ring larger than the second connecting ring, it is beneficial for the first connecting ring to form a radial covering abutment against the second connecting ring, preventing the feed pipe from detaching from the telescopic pipe fitting during the swinging process of the screen box driving the feed pipe.

[0007] Preferably, the telescopic pipe includes a corrugated pipe, with an upper connecting pipe and a lower connecting pipe coaxially connected to its top and bottom ends, respectively. The upper connecting pipe is connected to the bottom of the extension bracket via a first flange and communicates with the connecting pipe; the lower connecting pipe is connected to the first connecting ring via a second flange.

[0008] By adopting the above technical solution, when the screen box drives the feed pipe to reciprocate and swing, the corrugated pipe can adapt to the swing direction of the screen box to expand and contract to compensate for the relative displacement between the feed pipe and the connecting pipe. When the first connecting ring and the second connecting ring wear out, the corrugated pipe can drive the first connecting ring to move down to automatically compensate for the gap between the first connecting ring and the second connecting ring, ensuring that the first connecting ring always abuts against the second connecting ring, so that the output end of the upstream equipment and the feed pipe always maintain a sealed connection.

[0009] Preferably, both ends of the corrugated pipe are glued to the outer periphery of the upper connecting pipe and the lower connecting pipe respectively.

[0010] By adopting the above technical solution, a stable connection between the corrugated pipe and the upper and lower connecting pipes is achieved, which limits the separation of the corrugated pipe due to displacement and tension when the screen box swings, thus improving the structural stability of the telescopic pipe fitting.

[0011] Preferably, the bottom end of the connecting pipe is connected to a tapered pipe, which passes through the upper connecting pipe and the corrugated pipe and extends into the lower connecting pipe.

[0012] By adopting the above technical solution, the material is introduced into the lower connecting pipe using a tapered tube. When the screen box swings and causes the corrugated pipe to expand and contract, some of the material falling through the connecting pipe accumulates in the connection gap between the corrugated pipe and the lower connecting pipe.

[0013] Preferably, the first connecting ring is made of metal and the second connecting ring is made of polytetrafluoroethylene.

[0014] By adopting the above technical solution, it is beneficial to reduce the frictional loss between the first connecting ring and the second connecting ring, and extend the service life of the first connecting ring and the second connecting ring.

[0015] Preferably, a support flange is coaxially connected to the top of the feed pipe corresponding to the second connecting ring, and the second connecting ring is fixed to the support flange by fasteners.

[0016] By adopting the above technical solution, a detachable connection between the second connecting ring and the feed pipe is achieved, which facilitates disassembly and replacement after the second connecting ring is damaged.

[0017] Preferably, the outer peripheral edge of the upper surface of the second connecting ring is chamfered to form a bevel.

[0018] By adopting the above technical solution, it is beneficial to reduce the contact area between the first connecting ring and the second connecting ring, thereby reducing the friction between the first connecting ring and the second connecting ring and extending the service life of the first connecting ring and the second connecting ring.

[0019] Preferably, both the upper connecting pipe and the lower connecting pipe have a flexible sleeve wrapped around their respective ends.

[0020] By adopting the above technical solution, it is beneficial to limit the occurrence of rigid contact between the corrugated pipe and the pipe ends of the upper and lower connecting pipes when the corrugated pipe expands and deforms, which could lead to damage to the corrugated pipe.

[0021] Preferably, the bottom of the extension bracket is connected to a plurality of magnetic components, which are arranged opposite to the first connecting ring.

[0022] By adopting the above technical solution, when disassembling and replacing the second connecting ring, the first connecting ring can be moved upward and magnetically engaged with the magnetic suction component to temporarily restrict the downward movement of the first connecting ring, thus facilitating the disassembly and replacement of the second connecting ring.

[0023] Preferably, the telescopic fitting includes an inner tube and an outer tube, with the outer tube sleeved around the bottom end of the inner tube; the top end of the inner tube is connected to the bottom of the extension bracket via a third flange and communicates with the connecting pipe; the bottom end of the outer tube is connected to the first connecting ring via a fourth flange, and the third flange and the fourth flange are connected by a plurality of telescopic springs. When the first connecting ring abuts against the second connecting ring, the telescopic spring is in a compressed state.

[0024] By adopting the above technical solution, when the first connecting ring and the second connecting ring wear out, the first connecting ring can be driven to move down through the bellows to automatically compensate for the gap between the first connecting ring and the second connecting ring, ensuring that the first connecting ring always abuts against the second connecting ring.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. During the reciprocating swing of the screen box, the telescopic fitting drives the first connecting ring to abut against the second connecting ring, thereby ensuring a sealed connection between the output end of the upstream equipment and the feed pipe. This ensures that the material output from the upstream equipment can stably enter the feed pipe through the connecting pipe. At the same time, the telescopic fitting can automatically compensate for the axial distance caused by the wear of the first and second connecting rings, which helps to improve the sealing stability of the connecting pipe and the feed pipe.

[0026] 2. By setting the inclined surface on the upper surface of the second connecting ring, it is beneficial to reduce the contact area between the first connecting ring and the second connecting ring, and reduce the friction between the first connecting ring and the second connecting ring.

[0027] 3. By connecting a tapered tube to the bottom of the connecting pipe and extending the tapered tube into the lower connecting pipe, it is beneficial to direct the material into the lower connecting pipe and restrict the material from entering the connection gap between the corrugated pipe and the lower connecting pipe. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the rotary vibrating grading screen used in Example 1.

[0029] Figure 2 This is a schematic diagram of the connection between the screen box and the frame, as shown in Embodiment 1.

[0030] Figure 3 This is a schematic diagram of the structure of the feed pipe and telescopic pipe of the screen box in Embodiment 1.

[0031] Figure 4 yes Figure 3 Enlarged schematic diagram of part A in the middle.

[0032] Figure 5 This is a schematic diagram of the structure of the feed pipe and telescopic pipe of the screen box in Embodiment 2.

[0033] Figure 6 yes Figure 5 Enlarged schematic diagram of section B.

[0034] Explanation of reference numerals in the attached figures: 1. Frame; 11. Extension bracket; 111. Magnetic suction component; 12. Connecting pipe; 2. Screen box; 20. Universal joint hanger; 201. Limiting cable; 21. Feed pipe; 211. Support flange; 22. Discharge pipe; 23. Annular brush; 3. Rotary drive component; 4. Telescopic pipe fitting; 41. Corrugated pipe; 42. Upper connecting pipe; 421. First flange; 43. Lower connecting pipe; 431. Second flange; 44. Tapered pipe; 45. Flexible sleeve; 46. Inner pipe; 461. Third flange; 47. Outer pipe; 471. Fourth flange; 48. Telescopic spring; 5. First connecting ring; 6. Second connecting ring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] This application discloses a rotary vibrating grading screen.

[0037] Example 1 A type of vibrating rotary classifying sieve, referring to Figure 1 and Figure 2 The system includes a frame 1, a screen box 2, and a rotary drive unit 3. The screen box 2 is suspended from the top of the frame 1 by several universal joint rods 20. The rotary drive unit 3 is located at the bottom of the screen box 2 and is used to drive the screen box 2 to reciprocate and swing through the several universal joint rods 20. The screen box 2 is tilted, and a feed pipe 21 is connected to the top of the tilted screen box 2.

[0038] Reference Figure 1 and Figure 3 An extension bracket 11 is welded to the top of the frame 1 corresponding to the feed pipe 21. The extension bracket 11 is located above the feed pipe 21 and is equipped with a connecting pipe 12 for connecting to the discharge end of the upstream equipment. The top end of the connecting pipe 12 is equipped with a flange structure for connecting and fixing to the discharge end of the upstream equipment. The bottom end of the connecting pipe 12 is connected to a telescopic fitting 4, which is arranged opposite to the feed pipe 21. The outer circumferences of the telescopic fitting 4 and the feed pipe 21 are coaxially connected to a first connecting ring 5 and a second connecting ring 6, respectively, and the first connecting ring 5 and the second connecting ring 6 are abutted together. The diameter of the telescopic fitting 4 is smaller than the diameter of the feed pipe 21, and the diameter of the first connecting ring 5 is larger than the diameter of the second connecting ring 6.

[0039] By utilizing the telescopic fitting 4 in conjunction with the mutually abutting first connecting ring 5 and second connecting ring 6, a sealed connection can be achieved between the connecting pipe 12 and the feed pipe 21 of the screen box 2 when the screen box 2 swings to screen materials, limiting material leakage. Simultaneously, the telescopic fitting 4 can automatically compensate for the displacement caused by wear on the first connecting ring 5 and second connecting ring 6, ensuring that the connecting pipe 12 and the screen box 2 always maintain a sealed connection. In actual production, the diameters of components such as the telescopic fitting 4, feed pipe 21, first connecting ring 5, and second connecting ring 6 can be adjusted according to actual needs to ensure that the connecting pipe 12 and feed pipe 21 always maintain a sealed connection when the screen box 2 reciprocates.

[0040] Reference Figure 1 and Figure 2 Specifically, the frame 1 adopts a frame structure. The screen box 2 is rectangular, and different specifications of screens are installed inside the screen box 2 for separating impurities such as straw and sand, as well as for particle size classification of materials. Several screens work together to divide the interior of the screen box 2 into several screening chambers. Several discharge pipes 22 are connected to the lower inclined end of the screen box 2 corresponding to the screening chamber, and the discharge pipes 22 are respectively connected to the corresponding screening chambers. The ends of the discharge pipes 22 are all connected to the annular brushes 23, which are used to abut against the flange structure of the downstream equipment feed end to achieve a sealed connection between the discharge pipes 22 of the screen box 2 and the feed end of the downstream equipment. Several limiting cables 201 are also connected between the screen box 2 and the top of the frame 1. The length of the limiting cables 201 is longer than that of the universal joint rod to limit the interference of the limiting cables 201 with the normal swing of the screen box 2. At the same time, when the universal joint rod 20 is damaged or broken, the limiting cables 201 can be used to temporarily limit the screen box 2 to prevent the screen box 2 from falling directly. The rotary drive component 3 includes a motor and an eccentric mechanism. The motor drives the eccentric mechanism to rotate, thereby driving the screen box 2 to reciprocate and swing through the universal joint rod 20.

[0041] Reference Figure 3 and Figure 4 The telescopic fitting 4 includes a corrugated pipe 41. In this embodiment, the corrugated pipe 41 is made of rubber or plastic. When the first connecting ring 5 abuts against the second connecting ring 6, the corrugated pipe 41 is in a compressed state. The top and bottom ends of the corrugated pipe 41 are coaxially connected to an upper connecting pipe 42 and a lower connecting pipe 43, respectively. The two ends of the corrugated pipe 41 are respectively fitted and fixed to the upper connecting pipe 42 and the lower connecting pipe 43 with glue to achieve a stable connection between the corrugated pipe 41 and the upper connecting pipe 42 and the lower connecting pipe 43.

[0042] Reference Figure 3 and Figure 4The upper connecting pipe 42 is coaxially connected to a first flange 421 at its top end. The first flange 421 is fixedly connected to the bottom of the extension bracket 11 by bolts and nuts. The upper connecting pipe 42 is connected to the connecting pipe 12. The lower connecting pipe 43 is coaxially connected to a second flange 431 at its bottom end. The second flange 431 is connected to the first connecting ring 5 by bolts. In other embodiments, adhesive can also be used to connect the second flange 431 and the first connecting ring 5.

[0043] Reference Figure 3 and Figure 4 A tapered tube 44 is connected to the bottom end of the connecting pipe 12. The tapered tube 44 passes through the upper connecting pipe 42 and the corrugated pipe 41 and extends into the lower connecting pipe 43. The large-diameter end of the tapered tube 44 is connected to the bottom end of the connecting pipe 12, and the small-diameter end of the tapered tube 44 extends into the lower connecting pipe 43. The tapered tube 44 is used to guide the material into the lower connecting pipe 43 in a directional manner, so as to limit the accumulation of some material falling through the connecting pipe 12 in the connection gap between the corrugated pipe 41 and the lower connecting pipe 43 when the screen box 2 swings and causes the corrugated pipe 41 to expand and contract.

[0044] Reference Figure 3 and Figure 4 Both the upper connecting pipe 42 and the lower connecting pipe 43 have a flexible sleeve 45 wrapped around their respective ends. The flexible sleeve 45 is made of rubber. The flexible sleeve 45 is used to restrict the corrugated pipe 41 from making rigid contact with the pipe ends of the upper connecting pipe 42 and the lower connecting pipe 43 when the corrugated pipe 41 expands and contracts, so as to reduce the damage to the corrugated pipe 41.

[0045] Reference Figure 3 and Figure 4 In this embodiment, the first connecting ring 5 is made of metal, such as stainless steel. The second connecting ring 6 is made of polytetrafluoroethylene (PTFE). Utilizing the low-friction properties of polyethylene helps reduce frictional wear between the first connecting ring 5 and the second connecting ring 6, thus extending their service life.

[0046] Reference Figure 3 and Figure 4 A support flange 211 is coaxially connected to the top of the feed pipe 21 corresponding to the second connecting ring 6. The second connecting ring 6 is fixed to the support flange 211 by fasteners, realizing a detachable connection between the second connecting ring 6 and the feed pipe 21, which facilitates disassembly and replacement in case of damage to the second connecting ring 6. Specifically, the fasteners include several connecting bolts, and several countersunk holes are opened on the upper surface of the second connecting ring 6. The connecting bolts pass through the corresponding countersunk holes and are threaded to the support flange 211 to achieve a stable connection between the second connecting ring 6 and the support flange 211. At the same time, the countersunk holes limit the connecting bolts from protruding from the surface of the second connecting ring 6, avoiding interference between the connecting bolts and the mating fit between the first connecting ring 5 and the second connecting ring 6.

[0047] Reference Figure 3 and Figure 4 The outer periphery of the upper surface of the second connecting ring 6 is chamfered to form a bevel. The bevel formed by the chamfer helps to reduce the contact area between the first connecting ring 5 and the second connecting ring 6, thereby reducing the friction between the first connecting ring 5 and the second connecting ring 6 and facilitating a better extension of the service life of the first connecting ring 5 and the second connecting ring 6.

[0048] Reference Figure 3 and Figure 4 The bottom of the extension bracket 11 is connected to several magnetic components 111, which are evenly distributed around the upper connecting tube 42, and each magnetic component 111 is positioned opposite to the second connecting ring 6. When disassembling or replacing the second connecting ring 6, the first connecting ring 5 can be moved upward and magnetically engaged with the magnetic components 111 to temporarily restrict the downward movement of the first connecting ring 5, thus facilitating the disassembly or replacement of the second connecting ring 6.

[0049] The implementation principle of this embodiment is as follows: During equipment installation, the connecting pipe 12 on the extension bracket 11 is connected and fixed to the discharge end of the upstream equipment. When the subsequent screen box 2 swings back and forth via the rotary drive 3, the material output from the feeding equipment enters the top feed pipe 21 of the screen box 2 via the connecting pipe 12 and the telescopic pipe 4, and then enters the screen box 2 for processing. By using the telescopic pipe 4 in conjunction with the relatively abutting first connecting ring 5 and second connecting ring 6, a sealed connection between the connecting pipe 12 and the feed pipe 21 is achieved, thereby limiting the leakage of conveyed materials and dust.

[0050] Example 2 The difference between Example 2 and Example 1 is that the telescopic fitting 4 includes an inner tube 46 and an outer tube 47. The outer tube 47 is sleeved on the bottom end of the inner tube 46 via a linear bearing. A third flange 461 is connected to the top end of the inner tube 46. The third flange 461 is connected to the bottom of the extension bracket 11 via bolts and nuts. The inner tube 46 is connected to the connecting pipe 12. A fourth flange 471 is connected to the bottom end of the outer tube 47. The fourth flange 471 is connected to the first connecting ring 5 via bolts. The third flange 461 and the fourth flange 471 are connected by several telescopic springs 48. When the first connecting ring 5 abuts against the second connecting ring 6, the telescopic springs 48 are in a compressed state. When the first connecting ring 5 and the second connecting ring 6 wear down, the telescopic springs 48 drive the outer tube 47 and the first connecting ring 5 to move downward to compensate for the axial gap between the first connecting ring 5 and the second connecting ring 6, ensuring that the first connecting ring 5 and the second connecting ring 6 always remain in abutment. In other embodiments, the telescopic springs 48 can be replaced with a metal bellows 41.

[0051] The implementation principle of Example 2 is the same as that of Example 1, so it will not be described again here.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary vibrating grading screen, comprising a frame (1), a screen box (2), and a rotary drive (3), wherein the outside of the screen box (2) is suspended from the frame (1) by a plurality of universal joint rods (20), and the rotary drive (3) is disposed at the bottom of the screen box (2), the rotary drive (3) being used to drive the screen box (2) to reciprocate and swing through the plurality of universal joint rods (20); characterized in that: The top of the screen box (2) is connected to a feed pipe (21), and the top of the frame (1) is connected to an extension bracket (11). The extension bracket (11) is located above the feed pipe (21). The extension bracket (11) is provided with a connecting pipe (12) corresponding to the feed pipe (21). The connecting pipe (12) is used to connect to the output end of the upstream equipment. The bottom end of the connecting pipe (12) is also connected to a telescopic pipe fitting (4). The telescopic pipe fitting (4) and the feed pipe (21) are coaxially connected to a first connecting ring (5) and a second connecting ring (6) at their respective outer peripheries. The first connecting ring (5) and the second connecting ring (6) are abutted together. The diameter of the telescopic tube (4) is smaller than the diameter of the feed tube (21), and the diameter of the first connecting ring (5) is larger than the diameter of the second connecting ring (6).

2. A gyratory sifter according to claim 1, wherein: The telescopic fitting (4) includes a corrugated pipe (41), with an upper connecting pipe (42) and a lower connecting pipe (43) coaxially connected to the top and bottom ends of the corrugated pipe (41). The upper connecting pipe (42) is connected to the bottom of the extension bracket (11) through a first flange (421) and communicates with the connecting pipe (12). The lower connecting pipe (43) is connected to the first connecting ring (5) through a second flange (431).

3. The rotary vibrating grading screen according to claim 2, characterized in that: Both ends of the corrugated pipe (41) are glued to the outer periphery of the upper connecting pipe (42) and the lower connecting pipe (43) respectively.

4. The rotary vibrating grading screen according to claim 3, characterized in that: The bottom end of the connecting pipe (12) is connected to a tapered pipe (44), which passes through the upper connecting pipe (42) and the corrugated pipe (41) and extends into the lower connecting pipe (43).

5. A rotary vibrating grading screen according to claim 2, characterized in that: The first connecting ring (5) is made of metal, and the second connecting ring (6) is made of polytetrafluoroethylene.

6. A rotary vibrating grading screen according to claim 5, characterized in that: The top end of the feed pipe (21) is coaxially connected to the second connecting ring (6) with a support flange (211), and the second connecting ring (6) is fixed to the support flange (211) by fasteners.

7. A rotary vibrating classifier according to claim 5, characterized in that: The outer peripheral edge of the upper surface of the second connecting ring (6) is chamfered to form a bevel.

8. A rotary vibrating grading screen according to claim 3, characterized in that: Both the upper connecting pipe (42) and the lower connecting pipe (43) have a flexible sleeve (45) wrapped around their respective ends.

9. A rotary vibrating grading screen according to claim 5, characterized in that: The bottom of the extension bracket (11) is connected to a plurality of magnetic suction components (111), which are arranged opposite to the first connecting ring (5).

10. A rotary vibrating grading screen according to claim 1, characterized in that: The telescopic fitting (4) includes an inner tube (46) and an outer tube (47). The outer tube (47) is sleeved on the bottom end of the inner tube (46). The top end of the inner tube (46) is connected to the bottom of the extension bracket (11) through a third flange (461) and communicates with the connecting pipe (12). The bottom end of the outer tube (47) is connected to the first connecting ring (5) through a fourth flange (471). The third flange (461) and the fourth flange (471) are connected by several telescopic springs (48). When the first connecting ring (5) abuts against the second connecting ring (6), the telescopic spring (48) is in a compressed state.

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