Cooling device for an extrusion gear pelletizer

Abstract

The utility model belongs to powder raw material granulating mechanical equipment technical field, concretely relates to a kind of cooling device of extrusion gear type granulator, including support, press roll, oil delivery mechanism, rotating shaft and oil return cavity;Press roll includes press roll body, first oil channel, oil chamber and lower oil chamber, press roll body can be rotatably arranged on support, upper end is inserted into oil chamber, lower end is inserted into lower oil chamber, first oil channel is arranged in press roll body, for communicating oil chamber and lower oil chamber;Oil delivery mechanism is arranged on the top of support, for conveying cooling oil to oil chamber;Rotating shaft upper end is fixedly connected with support, middle part is equipped with second oil channel;Rotating shaft penetrates oil return cavity and is rotatably connected with oil return cavity, and second oil channel is used for communicating lower oil chamber and oil return cavity.Oil delivery mechanism conveys cooling oil into oil chamber, flows into lower oil chamber through first oil channel, then flows into oil return cavity through second oil channel, can cool and cool press roll body under working condition, to improve the working efficiency of granulator.

Description

Technical Field

[0001] This utility model belongs to the technical field of powder raw material granulation machinery and equipment, and specifically relates to a cooling device for an extrusion gear granulator. Background Technology

[0002] A granulator is a device that extrudes powdery materials into granules, and it is widely used in the feed and fertilizer industries. A traditional ring die granulator uses a rotating ring die to drive a driven roller within the die chamber, forcing the material entering the chamber through die holes on the inner circumference of the ring die to form granules.

[0003] Patent document CN113244851A discloses a planetary gear equal-volume extrusion gear granulator, relating to the field of granulation machinery and equipment technology. It includes a ring die and a pressure roller. The ring die includes a ring die body with a cylindrical structure, and internal teeth are provided on the inner sidewall of the ring die body. A die hole is radially through the ring die. The pressure roller includes a pressure roller body with a cylindrical structure, and external teeth that match the internal teeth are fixedly provided on the outer circumference of the pressure roller body. The pressure roller meshes with the ring die. The gear meshing is a line contact with a small contact area, resulting in low friction and thus reducing unnecessary frictional losses.

[0004] In practical use, it was found that the granulator in the aforementioned patent generates a large amount of heat during prolonged continuous operation, which can easily damage equipment parts. Therefore, it is necessary to pause the granulation process midway to allow the equipment to cool down naturally. To further improve the working efficiency of the granulator, a cooling device needs to be added to cool the pressure rollers during operation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a cooling device for an extrusion gear granulator, which can cool the pressure rollers during operation, thereby improving the working efficiency of the granulator. To solve the above technical problems, this utility model provides a cooling device for an extrusion gear granulator, comprising:

[0006] support;

[0007] The pressure roller includes a pressure roller body, a first oil passage, an upper oil cavity, and a lower oil cavity. The pressure roller body is rotatably mounted on the support, with its upper end extending into the upper oil cavity and its lower end extending into the lower oil cavity. The first oil passage is located within the pressure roller body and is used to connect the upper oil cavity and the lower oil cavity.

[0008] An oil delivery mechanism, located at the top of the support, is used to deliver cooling oil to the upper oil chamber;

[0009] The rotating shaft is fixedly connected to the bracket at its upper end and has a second oil passage in its middle.

[0010] The oil return chamber has a rotating shaft that passes through it and is rotatably connected to it. The second oil passage is used to connect the lower oil chamber and the oil return chamber.

[0011] Preferably, in the above scheme, the oil delivery mechanism includes an oil inlet chamber, a rotary joint, and a third oil passage. The oil inlet chamber is fixed at the top center of the bracket. The rotary joint is coaxially arranged with the rotating shaft, and its lower end is rotatably connected to the oil inlet chamber. The third oil passage is used to connect the oil inlet chamber and the upper oil chamber.

[0012] Preferably, in the above scheme, the oil delivery mechanism further includes an oil pipe and a fixing component, one end of the oil pipe is matched with the upper end of the rotary joint, and is detachably connected to the rotary joint through the fixing component.

[0013] Preferably, in the above scheme, a plurality of pressure rollers are arranged in a circumferential array on the outside of the rotating shaft, and the third oil passage is provided on the bracket and the number is the same as the number of pressure rollers.

[0014] Preferably, in the above scheme, the second oil passage includes a lower oil port, an upper oil port, and a connecting pipe. The lower oil port and the upper oil port, which are interconnected, are respectively located in the middle of the rotating shaft. The lower oil port is connected to the oil return cavity, and the upper oil port is connected to the lower oil cavity through the connecting pipe.

[0015] Preferably, in the above scheme, the oil return cavity includes a sleeve and a cover, the middle part of the rotating shaft is installed in the sleeve through a bearing, the cover is respectively disposed at the upper and lower ends of the sleeve and is rotatably and sealingly connected to the rotating shaft, and the lower oil port is located in the sleeve.

[0016] Preferably, in the above scheme, the oil return cavity further includes an oil guide connector, which is located on the lower part of the side wall of the sleeve.

[0017] Preferably, in the above scheme, the bracket includes a throwing disc, a mounting base, and an upper connecting plate. The throwing disc and the upper connecting plate are detachably connected through the mounting base. The upper end of the pressure roller is rotatably connected to the upper connecting plate, and the lower end is rotatably connected to the throwing disc.

[0018] Preferably, in the above scheme, the rotating shaft, the throwing disc, and the upper connecting plate are coaxially arranged, and the upper end of the rotating shaft is fixedly connected to the throwing disc.

[0019] Preferably, in the above scheme, the bracket further includes a ring die centering plate, which is disposed on the upper surface of the throwing disc and is coaxially arranged with the throwing disc.

[0020] Compared with existing technologies, this utility model has the following beneficial effects:

[0021] 1. A cooling device for an extrusion gear granulator according to this utility model includes a pressure roller comprising a pressure roller body, a first oil passage, an upper oil chamber, and a lower oil chamber. The pressure roller body is rotatably mounted on a support, with its upper end extending into the upper oil chamber and its lower end extending into the lower oil chamber. The first oil passage is located within the pressure roller body and connects the upper and lower oil chambers. An oil conveying mechanism delivers cooling oil to the upper oil chamber, which then flows into the lower oil chamber via the first oil passage, and finally into the return oil chamber via the second oil passage. This device cools the pressure roller body during operation, thereby improving the granulator's efficiency. Furthermore, the cooling oil in the upper and lower oil chambers lubricates the upper and lower rotating parts of the pressure roller body, while the cooling oil in the return oil chamber lubricates and cools the rotating shaft.

[0022] 2. The oil conveying mechanism of this utility model includes an oil inlet chamber, a rotary joint, a third oil passage, an oil pipe, and a fixing component. The oil inlet chamber is fixed at the top center of the support. The rotary joint is coaxially arranged with the rotating shaft, and its lower end is rotatably connected to the oil inlet chamber. The third oil passage is used to connect the oil inlet chamber and the upper oil chamber. The upper end of the rotary joint is connected to one end of the oil pipe through the fixing component, and the lower end of the rotary joint is connected to the top of the oil inlet chamber through a bearing. When the rotating shaft drives the support and the oil inlet chamber to rotate, the rotary joint will not rotate synchronously, which can realize the conveying of cooling oil in the working state of the granulator.

[0023] 3. The second oil passage in this utility model includes a lower oil port, an upper oil port, and a connecting pipe. The lower oil port and the upper oil port, which are interconnected, are respectively located in the middle of the rotating shaft. The lower oil port is connected to the oil return cavity. The oil return cavity includes a sleeve and a cover. The middle part of the rotating shaft is installed in the sleeve through a bearing. The cover is respectively located at the upper and lower ends of the sleeve and is rotatably sealed to the rotating shaft. The lower oil port is located in the sleeve. When the rotating shaft is in operation, the cooling oil can flow smoothly into the internal space formed by the sleeve and the cover. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cooling device of an extrusion gear granulator according to the present invention.

[0025] Figure 2 This utility model Figure 1 A magnified view of part A in the middle.

[0026] Figure 3 This utility model Figure 1 A magnified view of part B in the middle.

[0027] Figure 4 This utility model Figure 1 A magnified view of a portion of C.

[0028] Among them, 1-bracket, 11-throwing plate, 12-mounting seat, 13-upper connecting plate, 14-ring die centering plate, 2-pressure roller, 21-pressure roller body, 22-first oil passage, 23-upper oil cavity, 24-lower oil cavity, 3-oil conveying mechanism, 31-oil inlet cavity, 32-rotary joint, 33-third oil passage, 34-oil pipe, 35-fixed component, 4-rotating shaft, 41-second oil passage, 411-lower oil port, 412-upper oil port, 413-connecting pipe, 5-oil return cavity body, 51-sleeve, 52-cap, 53-oil guide joint. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0033] like Figures 1 to 4 As shown, this utility model discloses a cooling device for an extrusion gear granulator, including a support 1, a pressure roller 2, an oil conveying mechanism 3, a rotating shaft 4, and an oil return cavity 5. The pressure roller 2 includes a pressure roller body 21, a first oil passage 22, an upper oil cavity 23, and a lower oil cavity 24. The pressure roller body 21 is rotatably mounted on the support 1, with its upper end extending into the upper oil cavity 23 and its lower end extending into the lower oil cavity 24. The first oil passage 22 is located inside the pressure roller body 21 and is used to connect the upper oil cavity 23 and the lower oil cavity 24. The oil conveying mechanism 3 is located at the top of the support 1 and is used to convey cooling oil to the upper oil cavity 23. The upper end of the rotating shaft 4 is fixedly connected to the support 1, and a second oil passage 41 is provided in the middle. The rotating shaft 4 passes through the oil return cavity 5 and is rotatably connected to the oil return cavity 5. The second oil passage 41 is used to connect the lower oil cavity 24 and the oil return cavity 5.

[0034] In this embodiment, the oil delivery mechanism 3 delivers cooling oil to the upper oil chamber 23, flows into the lower oil chamber 24 through the first oil passage 22, and then flows into the return oil chamber 5 through the second oil passage 41. This cools the pressure roller body 21 during operation, thereby improving the working efficiency of the granulator. Furthermore, the cooling oil in the upper and lower oil chambers 23 and 24 lubricates the upper and lower rotating parts of the pressure roller body 21, while the cooling oil in the return oil chamber 5 lubricates and cools the rotating shaft 4.

[0035] Specifically, the oil delivery mechanism 3 in this embodiment includes an oil inlet chamber 31, a rotary joint 32, and a third oil passage 33. The oil inlet chamber 31 is fixed to the top center of the support 1. The rotary joint 32 is coaxially arranged with the rotating shaft 4, and its lower end is rotatably connected to the oil inlet chamber 31. The third oil passage 33 is used to connect the oil inlet chamber 31 and the upper oil chamber 23. (Continue to refer to...) Figure 2 The oil delivery mechanism 3 also includes an oil pipe 34 and a fixing member 35. One end of the oil pipe 34 is matched with the upper end of the rotary joint 32 and is detachably connected to the rotary joint 32 through the fixing member 35. The other end of the oil pipe 34 is connected to an external oil pump for delivering cooling oil.

[0036] It should be understood that the fixing member 35 is set as a nut that is threadedly connected to the upper end of the rotary joint 32, which can fix the upper end of the rotary joint 32 to one end of the oil pipe 34. The lower end of the rotary joint 32 is connected to the top of the oil inlet chamber 31 through a bearing. When the rotating shaft 4 drives the support 1 and the oil inlet chamber 31 to rotate, the rotary joint 32 will not rotate synchronously, which can realize the delivery of cooling oil in the working state of the granulator. Furthermore, multiple pressure rollers 2 are arranged in a circumferential array on the outside of the rotating shaft 4, and the third oil passage 33 is provided on the support 1 and the number is the same as the number of pressure rollers 2, so as to cool down multiple pressure rollers 2 at the same time.

[0037] Preferably, the upper end of the pressure roller body 21 is mounted in the upper oil cavity 23 via a bearing, and the upper end is mounted in the lower oil cavity 24 via a bearing. The inlet of the first oil passage 22 is located at the top of the pressure roller body 21, and the outlet of the first oil passage 22 is located at the lower end of the pressure roller body 21 and near the upper end of the bearing mounting position. (Continuing to refer to...) Figure 3 and Figure 4 The cooling oil flows through the third oil passage 33 to the upper bearing mounting position of the pressure roller body 21, and then through the first oil passage 22 to the lower bearing mounting position of the pressure roller body 21, thereby lubricating the bearing mounting positions at both ends of the pressure roller body 21.

[0038] Continue to refer to Figure 4 In this embodiment, the second oil passage 41 includes a lower oil port 411, an upper oil port 412, and a connecting pipe 413. The interconnected lower oil port 411 and upper oil port 412 are respectively located in the middle of the rotating shaft 4. The lower oil port 411 is connected to the return oil cavity 5. The number of upper oil ports 412 is the same as the number of pressure rollers 2. The upper oil ports 412 are connected to the lower oil cavity 24 through the connecting pipe 413. Specifically, the return oil cavity 5 includes a sleeve 51 and a cover 52. The middle part of the rotating shaft 4 is installed in the sleeve 51 through a bearing. The cover 52 is respectively located at the upper and lower ends of the sleeve 51 and is rotatably sealed to the rotating shaft 4. The lower oil port 411 is located in the sleeve 51 and is set near the upper end of the cover 52. Cooling oil can flow to the bearing mounting part of the rotating shaft 4 and can lubricate the bearing mounting part of the rotating shaft 4. The internal space formed by the sleeve 51 and the cover 52 can store cooling oil.

[0039] In addition, the oil return chamber 5 also includes an oil guide connector 53, which is located on the lower part of the side wall of the sleeve 51 and is used to connect to an external cooling oil storage container.

[0040] Continue to refer to Figure 1 In this embodiment, oil seals are provided at the rotary joint 32 and the oil inlet chamber 31, the rotary joints of the pressure roller body 21 and the upper oil chamber 23 and the lower oil chamber 24, and the rotary joints of the rotating shaft 4 and the cover 52, in order to realize the rotary sealing function and prevent the cooling oil from leaking.

[0041] In this embodiment, the support 1 includes a throwing disc 11, a mounting base 12, and an upper connecting plate 13. The throwing disc 11 and the upper connecting plate 13 are detachably connected via the mounting base 12. The upper end of the pressure roller 2 is rotatably connected to the upper connecting plate 13, and the lower end is rotatably connected to the throwing disc 11. Specifically, the rotating shaft 4, the throwing disc 11, and the upper connecting plate 13 are coaxially arranged, and the upper end of the rotating shaft 4 is fixedly connected to the throwing disc 11. In addition, the support 1 also includes a ring die centering plate 14, which is located on the upper surface of the throwing disc 11 and is coaxially arranged with the throwing disc 11, facilitating the positioning and installation of the ring die of the extrusion gear granulator.

[0042] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A cooling device for an extrusion gear granulator, characterized in that, include: support; The pressure roller includes a pressure roller body, a first oil passage, an upper oil cavity, and a lower oil cavity. The pressure roller body is rotatably mounted on the support, with its upper end extending into the upper oil cavity and its lower end extending into the lower oil cavity. The first oil passage is located within the pressure roller body and is used to connect the upper oil cavity and the lower oil cavity. An oil delivery mechanism, located at the top of the support, is used to deliver cooling oil to the upper oil chamber; The rotating shaft is fixedly connected to the bracket at its upper end and has a second oil passage in its middle. The oil return chamber has a rotating shaft that passes through it and is rotatably connected to it. The second oil passage is used to connect the lower oil chamber and the oil return chamber.

2. The cooling device for an extrusion gear granulator according to claim 1, characterized in that, The oil delivery mechanism includes an oil inlet chamber, a rotary joint, and a third oil passage. The oil inlet chamber is fixed at the top center of the bracket. The rotary joint is coaxially arranged with the rotating shaft, and its lower end is rotatably connected to the oil inlet chamber. The third oil passage is used to connect the oil inlet chamber and the upper oil chamber.

3. The cooling device for an extrusion gear granulator according to claim 2, characterized in that, The oil delivery mechanism also includes an oil pipe and a fixing component. One end of the oil pipe matches the upper end of the rotary joint, and the fixing component is detachably connected to the rotary joint.

4. The cooling device for an extrusion gear granulator according to claim 2, characterized in that, Multiple pressure rollers are arranged in a circumferential array on the outside of the rotating shaft, and the third oil passage is provided on the support and the number of oil passages is the same as the number of pressure rollers.

5. The cooling device for an extrusion gear granulator according to claim 1, characterized in that, The second oil passage includes a lower oil port, an upper oil port, and a connecting pipe. The lower oil port and the upper oil port, which are interconnected, are respectively located in the middle of the rotating shaft. The lower oil port is connected to the oil return cavity, and the upper oil port is connected to the lower oil cavity through the connecting pipe.

6. The cooling device for an extrusion gear granulator according to claim 5, characterized in that, The oil return chamber includes a sleeve and a cover. The middle part of the rotating shaft is installed in the sleeve through a bearing. The cover is respectively located at the upper and lower ends of the sleeve and is rotatably and sealingly connected to the rotating shaft. The lower oil port is located inside the sleeve.

7. The cooling device for an extrusion gear granulator according to claim 6, characterized in that, The oil return cavity also includes an oil guide connector, which is located on the lower part of the side wall of the sleeve.

8. The cooling device for an extrusion gear granulator according to claim 1, characterized in that, The support includes a throwing disc, a mounting base, and an upper connecting plate. The throwing disc and the upper connecting plate are detachably connected through the mounting base. The upper end of the pressure roller is rotatably connected to the upper connecting plate, and the lower end is rotatably connected to the throwing disc.

9. The cooling device for an extrusion gear granulator according to claim 8, characterized in that, The rotating shaft, the throwing disc, and the upper connecting plate are coaxially arranged, and the upper end of the rotating shaft is fixedly connected to the throwing disc.

10. A cooling device for an extrusion gear granulator according to claim 9, characterized in that, The support also includes a ring die centering plate, which is disposed on the upper surface of the throwing disc and is coaxially arranged with the throwing disc.

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