Screw rod shaft withdrawing device of bulking machine

Abstract

The utility model relates to the technical field of shaft withdrawing of screws of bulking machines, in particular to a shaft withdrawing device for screws of bulking machines, which comprises a machine barrel, a support frame is fixedly connected to one side of the machine barrel, and two screws are rotatably connected in the machine barrel and the support frame. The shaft withdrawing mechanism is fixedly connected with the machine barrel and is rotationally connected with the screw rod; by arranging the first sliding rod, the second sliding rod and the third sliding rod which are different in diameter and the first connecting hole and the second connecting hole which are different in diameter, the screw can be pushed out of the machine barrel under the action of the power part, shaft withdrawing work is completed, manual work is replaced by a machine, labor cost is reduced, and production efficiency is improved. And the working efficiency during replacement of the screw is improved, the safety of the device is improved, and the interior of the machine barrel and the screw can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of screw shaft retraction for an extruder, in particular to a screw shaft retraction device for an extruder. Background Art

[0002] The puffing machine is a kind of equipment for processing puffed food, such as rice, corn, soybean, wheat, etc. in daily life. Its main working principle is to convert mechanical energy into thermal energy, and use the heat generated by the rotation of the machine to squeeze and cook the food. The most obvious feature of puffed food is that its volume becomes larger.

[0003] After the existing screw extruder has been used for a period of time, it is necessary to replace the screw or clean the screw in the barrel. In this process, the screw needs to be disassembled to remove the screw from the barrel. After the screw extruder is completed, there is often residual material in the barrel, and the friction between the screw and the barrel is relatively large. The existing process is to heat the barrel at high temperature first to carbonize the material and reduce the friction, and then the worker takes the screw out of the barrel. This is not only time-consuming and laborious, but also in the process, it is easy to cause workers to be injured and cause safety accidents, and there are certain safety hazards.

[0004] Therefore, the present application provides a screw retracting device for an extruder to overcome the defects of the prior art. Utility Model Content

[0005] The utility model aims to solve the problem that the existing technology is not only time-consuming and labor-intensive, but also easily causes worker injuries and safety accidents during the process, and has potential safety hazards.

[0006] The technical solution of the utility model provides a screw shaft retraction device for an extruder, comprising a barrel, one side of the barrel is fixedly connected to a support frame, two screws are rotatably connected between the barrel and the support frame, a shaft retraction mechanism is arranged in the support frame, the shaft retraction mechanism is fixedly connected to the barrel and rotatably connected to the screw.

[0007] As a preferred technical solution, the two screws each include a first sliding rod, a second sliding rod is fixedly connected to one side of the first sliding rod, a third sliding rod is fixedly connected to the side of the second sliding rod away from the first sliding rod, a threaded rod is fixedly connected to the side of the third sliding rod away from the second sliding rod, the diameter of the third sliding rod is greater than the diameter of the second sliding rod, and the diameter of the second sliding rod is greater than the diameter of the first sliding rod; the diameters of the first sliding rod, the second sliding rod and the third sliding rod are different to facilitate the shaft retraction mechanism to push the screw to move, so as to facilitate the screw to be pushed out of the barrel.

[0008] As a preferred technical solution, the shaft retracting mechanism includes a connecting shaft part and a power part, the connecting shaft part and the power part are bolted together, the connecting shaft part is rotationally connected to the screw, and the power part is fixedly connected to the barrel; the power part can drive the connecting shaft part to move, thereby pushing the screw to move.

[0009] As a preferred technical solution, the coupling part includes a first connecting plate and a second connecting plate arranged opposite to each other, the first connecting plate and the second connecting plate are both composed of an upper pressing block and a lower pressing block, the upper pressing block and the lower pressing block are threadedly connected by a first bolt, the first connecting plate is provided with two first connecting holes, the second connecting plate is provided with two second connecting holes, the two first connecting holes and the two second connecting holes are both provided between the upper pressing block and the lower pressing block, the diameter of the first connecting hole is larger than the diameter of the second connecting hole, the first connecting plate is rotatably connected to the second sliding rod through the two first connecting holes, the second connecting plate is rotatably connected to the first sliding rod through the two second connecting holes, and the bottom of the lower pressing block is fixedly connected to two third connecting plates arranged opposite to each other; the first connecting hole and the second connecting hole do not affect the normal operation of the screw rod, and the first connecting plate and the second connecting plate can drive the screw rod to move.

[0010] As a preferred technical solution, the power unit includes a cylinder, the top of the cylinder is fixedly connected to the bottom of the barrel, the output end of the cylinder is transmission-connected to a piston rod, the other end of the piston rod is bolted to a connecting rod, and the connecting rod is threadedly connected to a third connecting plate; the cylinder can drive the piston rod and the connecting rod to move.

[0011] As a preferred technical solution, the end of the piston rod away from the oil cylinder is fixedly connected to a shell, and the shell is arranged between two third connecting plates below the second connecting plate. A third connecting hole is opened on the shell, and a second bolt is threadedly connected to the third connecting hole. The shell, connecting rod and two third connecting plates are threadedly connected by the second bolt; the piston rod can drive the connecting rod and the two third connecting plates to move through the shell, so that the second connecting plate can push the screw rod.

[0012] As a preferred technical solution, the end of the connecting rod away from the oil cylinder is fixedly connected to a connecting block, and the connecting block is arranged between the two third connecting plates below the first connecting plate. A fourth connecting hole is opened on the connecting block, and a second bolt is threadedly connected to the fourth connecting hole. The connecting block and the two third connecting plates are threadedly connected by the second bolt; the connecting rod can drive the two third connecting plates to move through the connecting block, so that the first connecting plate can push the screw rod.

[0013] The beneficial effects of the screw shaft retracting device for an extruder provided by the utility model are:

[0014] The utility model provides a first sliding rod, a second sliding rod, and a third sliding rod with different diameters and a first connecting hole and a second connecting hole with different diameters, so that the screw can be pushed out of the barrel under the action of the power unit, thereby completing the shaft retraction work, using machines instead of manual labor, reducing labor costs, enhancing work efficiency when replacing the screw, improving the safety of the device, and facilitating cleaning of the inside of the barrel and the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0016] Figure 2 It is a front view of the first embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of a barrel, a support frame and a shaft retracting mechanism of a first embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of a screw rod and a shaft retracting mechanism according to a first embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of a screw rod according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of a connecting shaft portion of a first embodiment of the utility model;

[0021] Figure 7 It is a schematic diagram of the power unit of the first embodiment of the utility model.

[0022] Among them, 1. barrel; 2. support frame; 3. screw; 31. first slide bar; 32. second slide bar; 33. third slide bar; 34. threaded rod; 4. shaft retraction mechanism; 5. shaft connecting part; 51. first connecting plate; 511. first connecting hole; 52. second connecting plate; 521. second connecting hole; 53. upper pressure block; 54. lower pressure block; 55. first bolt; 56. third connecting plate; 57. second bolt; 6. power part; 61. cylinder; 62. piston rod; 63. housing; 631. third connecting hole; 64. connecting rod; 65. connecting block; 651. fourth connecting hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, technical features, utility model objectives and technical effects achieved by the utility model easy to understand, the utility model is further explained below in conjunction with specific diagrams; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] As attached Figure 1 To Attachment Figure 7 As shown: a screw shaft retraction device for an extruder, comprising a barrel 1, a support frame 2 is fixedly connected to one side of the barrel 1, two screws 3 are rotatably connected inside the barrel 1 and the support frame 2, a shaft retraction mechanism 4 is provided inside the support frame 2, the shaft retraction mechanism 4 is fixedly connected to the barrel 1, and the shaft retraction mechanism 4 is rotatably connected to the two screws 3 inside the support frame 2.

[0026] As attached Figure 1 , Attachment Figure 2 To Attachment Figure 4 , Attachment Figure 5 As shown: the two screw rods 3 each include a first slide rod 31, a second slide rod 32 is fixedly connected to one side of the first slide rod 31, a third slide rod 33 is fixedly connected to the side of the second slide rod 32 away from the first slide rod 31, a threaded rod 34 is fixedly connected to the side of the third slide rod 33 away from the second slide rod 32, the first slide rod 31, the second slide rod 32 and the third slide rod 33 are all smooth screw rods, and the diameters of the three are different, the diameter of the third slide rod 33 is larger than the diameter of the second slide rod 32, and the diameter of the second slide rod 32 is larger than the diameter of the first slide rod 31;.

[0027] As attached Figure 1 To Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7 As shown: the shaft retracting mechanism 4 includes a connecting shaft portion 5 and a power portion 6, the connecting shaft portion 5 and the power portion 6 are bolted, the connecting shaft portion 5 is rotationally connected to the screw 3, and the top of the power portion 6 is fixedly connected to the bottom of the barrel 1.

[0028] The coupling portion 5 includes a first connecting plate 51 and a second connecting plate 52 which are arranged opposite to each other. The first connecting plate 51 and the second connecting plate 52 are both composed of an upper pressing block 53 and a lower pressing block 54. The upper pressing block 53 and the lower pressing block 54 are provided with internal threaded holes, and first bolts 55 are screwed into the internal threaded holes. The upper pressing block 53 and the lower pressing block 54 are threadedly connected by the first bolts 55. The first connecting plate 51 is provided with two first connecting holes 511 which are arranged opposite to each other, and the second connecting plate 52 is provided with two second connecting holes 521 which are arranged opposite to each other. The two first connecting holes 511 and the two second connecting holes 521 are both provided between the upper pressing block 53 and the lower pressing block 54. The diameter of the first connecting hole 511 is larger than the diameter of the second connecting hole 521. The first connecting plate 51 is rotatably connected to the second slide bar 32 through the first connecting hole 511, and the diameter of the first connecting hole 511 is not less than the diameter of the second slide bar 32 and is smaller than the diameter of the third slide bar 33. The second connecting plate 52 is rotatably connected to the first slide bar 31 through the second connecting hole 521, and the diameter of the second connecting hole 521 is not less than the diameter of the first slide bar 31 and is smaller than the diameter of the second slide bar 32. The bottom of each of the lower pressing blocks 54 is fixedly connected to two relatively arranged third connecting plates 56, and a second bolt 57 is threadedly connected between the two third connecting plates 56 and the power unit 6. The first connecting plate 51 and the second connecting plate 52 can push the screw 3 to move to the side away from the barrel 1 under the action of the power unit 6, so that the screw 3 can exit the barrel 1.

[0029] The power unit 6 includes a cylinder 61, the top of which is fixedly connected to the bottom of the barrel 1, the output end of the cylinder 61 faces the support frame 2, the output end of the cylinder 61 is transmission-connected with a piston rod 62, the end of the piston rod 62 away from the cylinder 61 is fixedly connected with a shell 63, the shell 63 is arranged between two third connecting plates 56 below the second connecting plate 52, the side of the shell 63 away from the cylinder 61 is bolted with a connecting rod 64, a third connecting hole 631 is horizontally opened on the shell 63, the third connecting hole 631 is internally threadedly connected with a second bolt 57, the shell 63, the connecting rod 64 and the two third connecting plates 56 are connected. The connecting rod 64 is threadedly connected to the third connecting plate 56 by a second bolt 57, and the connecting rod 64 is threadedly connected to the third connecting plate 56. The end of the connecting rod 64 away from the oil cylinder 61 is fixedly connected to a connecting block 65, and the connecting block 65 is arranged between the two third connecting plates 56 below the first connecting plate 51. A fourth connecting hole 651 is horizontally opened on the connecting block 65, and the second bolt 57 is threadedly connected to the fourth connecting hole 651. The connecting block 65 and the two third connecting plates 56 are threadedly connected by the second bolt 57; the oil cylinder 61 can drive the first connecting plate 51 and the second connecting plate 52 to move through the piston rod 62 and the connecting rod 64, thereby pushing the screw 3 out of the barrel 1.

[0030] Working method: Start the oil cylinder 61, the oil cylinder 61 drives the piston rod 62 and the connecting rod 64 to move, the piston rod 62 and the connecting rod 64 drive the first connecting plate 51 and the second connecting plate 52 to move away from the barrel 1 through the third connecting plate 56, thereby pushing the screw 3 to move away from the barrel 1 until the screw 3 is separated from the barrel 1.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should fall within the technical scope of the present invention.

Claims

1. A screw shaft retracting device for an extruder, comprising a barrel (1), one side of the barrel (1) is fixedly connected to a support frame (2), and two screws (3) are rotatably connected inside the barrel (1) and the support frame (2), characterized in that: A shaft-retracting mechanism (4) is provided in the support frame (2); the shaft-retracting mechanism (4) is fixedly connected to the barrel (1) and rotationally connected to the screw (3).

2. The screw shaft retracting device for an extruder according to claim 1, characterized in that: The two screw rods (3) each comprise a first slide rod (31), one side of the first slide rod (31) being fixedly connected to a second slide rod (32), a side of the second slide rod (32) away from the first slide rod (31) being fixedly connected to a third slide rod (33), a side of the third slide rod (33) away from the second slide rod (32) being fixedly connected to a threaded rod (34), a diameter of the third slide rod (33) being greater than a diameter of the second slide rod (32), and a diameter of the second slide rod (32) being greater than a diameter of the first slide rod (31).

3. The screw shaft retracting device for an extruder according to claim 2, characterized in that: The shaft-retracting mechanism (4) comprises a shaft connection part (5) and a power part (6), wherein the shaft connection part (5) and the power part (6) are connected by bolts, the shaft connection part (5) is rotationally connected to the screw rod (3), and the power part (6) is fixedly connected to the barrel (1).

4. The screw shaft retracting device for an extruder according to claim 3, characterized in that: The shaft connection portion (5) comprises a first connecting plate (51) and a second connecting plate (52) arranged opposite to each other. The first connecting plate (51) and the second connecting plate (52) are both composed of an upper pressing block (53) and a lower pressing block (54). The upper pressing block (53) and the lower pressing block (54) are threadedly connected via a first bolt (55). The first connecting plate (51) is provided with two first connecting holes (511), and the second connecting plate (52) is provided with two second connecting holes (521). The two first connecting holes (511) The two second connection holes (521) are both opened between the upper pressing block (53) and the lower pressing block (54); the diameter of the first connection hole (511) is larger than the diameter of the second connection hole (521); the first connection plate (51) is rotationally connected to the second slide bar (32) through the two first connection holes (511); the second connection plate (52) is rotationally connected to the first slide bar (31) through the two second connection holes (521); and the bottom of the lower pressing block (54) is fixedly connected to two third connection plates (56) arranged opposite to each other.

5. The screw shaft retracting device for an extruder according to claim 4, characterized in that: The power unit (6) comprises an oil cylinder (61), the top of which is fixedly connected to the bottom of the barrel (1), the output end of which is transmission-connected to a piston rod (62), the other end of which is bolted to a connecting rod (64), and the connecting rod (64) is threadedly connected to a third connecting plate (56).

6. The screw shaft retracting device for an extruder according to claim 5, characterized in that: One end of the piston rod (62) away from the oil cylinder (61) is fixedly connected to a housing (63); the housing (63) is arranged between two third connecting plates (56) below the second connecting plate (52); a third connecting hole (631) is opened on the housing (63); a second bolt (57) is threadedly connected to the inner surface of the third connecting hole (631); the housing (63), the connecting rod (64) and the two third connecting plates (56) are threadedly connected via the second bolt (57).

7. The screw shaft retracting device for an extruder according to claim 5, characterized in that: One end of the connecting rod (64) away from the oil cylinder (61) is fixedly connected to a connecting block (65), and the connecting block (65) is arranged between two third connecting plates (56) below the first connecting plate (51). A fourth connecting hole (651) is opened on the connecting block (65), and a second bolt (57) is threadedly connected to the inner thread of the fourth connecting hole (651). The connecting block (65) and the two third connecting plates (56) are threadedly connected via the second bolt (57).

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