Feed mechanism for pelletizing device of underwater pelletizer

Abstract

The utility model relates to the technical field of underwater granulator feeding, and discloses a feeding mechanism for a granulating device of an underwater granulator, the feeding mechanism comprises a protective cylinder, a threaded tooth sleeve, a threaded rod, an adjusting cylinder and a driving motor, the protective cylinder is arranged outside a sliding working shaft; the thread tooth sleeve is arranged on the protective cylinder; the threaded rod is in running fit with the sliding working shaft through the adapter; the threaded rod penetrates through the threaded tooth sleeve and is in threaded connection with the threaded tooth sleeve; the adjusting cylinder is arranged outside the protective cylinder and arranged outside the threaded rod in a sleeving mode. The driving motor is arranged on the adjusting cylinder and is in transmission connection with the threaded rod; the distance between a motor shaft of the driving motor and the axial direction of the threaded rod can be adjusted. The effect of improving the accuracy of the moving position of the sliding working shaft is achieved.

Description

Technical Field

[0001] This application relates to the field of underwater pelletizer feed technology, and in particular to a feed mechanism for an underwater pelletizer pelletizing device. Background Technology

[0002] An underwater pelletizer is a device used for cutting and crushing materials underwater, widely applied in marine engineering, underwater pipeline maintenance, port construction, and other fields. Its working principle involves using the energy of water flow to propel the equipment, using rotating blades to cut materials into smaller particles. The feed mechanism is one of the core components of the underwater pelletizer, responsible for controlling the forward and backward movement of the cutters to achieve precise cutting of materials.

[0003] A Chinese patent with authorization announcement number CN207578788U discloses an underwater pelletizer. The main shaft is a hollow shaft with a central hole arranged along the axial direction of the main shaft. A sliding working shaft is inserted through the central hole of the main shaft and extends from both ends of the main shaft. A cutter disc is fixedly connected to one end of the sliding working shaft, and a control sleeve is sleeved on the other end of the sliding working shaft. One end of the control sleeve is connected to the motor housing, and the outer end of the control sleeve is provided with an external thread. A manual feed disc is connected to this shaft end of the control sleeve through the external thread. A pneumatic thrust device is provided on the outside of the manual feed disc and is connected to the sliding working shaft.

[0004] The pneumatic device of the aforementioned underwater pelletizer is a cylinder. However, when the cylinder is used as a power source, the required air pressure intensity is difficult to control when the cylinder push rod is suddenly pushed by air pressure in a stationary state. It is easy to have defects such as insufficient air pressure to push, excessive air pressure causing the cylinder push rod to move too fast, resulting in inaccurate pushing position. Utility Model Content

[0005] To improve the accuracy of the sliding working shaft's movement position, this application provides a feed mechanism for an underwater pelletizer pelletizing device.

[0006] The feeding mechanism for an underwater pelletizer pelletizing device provided in this application adopts the following technical solution:

[0007] A cutting mechanism for an underwater pelletizer pelletizing device, the cutting mechanism being used to drive a sliding working shaft to move along its own axis, the cutting mechanism comprising a protective cylinder, a threaded sleeve, a threaded rod, an adjusting cylinder, and a drive motor, wherein:

[0008] The protective sleeve is located outside the sliding working shaft;

[0009] The threaded sleeve is provided on the protective cylinder;

[0010] The threaded rod is rotatably engaged with the sliding working shaft via an adapter.

[0011] The threaded rod passes through the threaded sleeve and is threadedly connected to the threaded sleeve;

[0012] The adjusting cylinder is located outside the protective cylinder and is sleeved outside the threaded rod;

[0013] The drive motor is mounted on the adjusting cylinder and is connected to the threaded rod in a transmission manner.

[0014] The axial distance between the motor shaft and the threaded rod of the drive motor is adjustable.

[0015] Optionally, a movable part is provided between the drive motor and the threaded rod;

[0016] The movable component includes a mounting cylinder, wherein:

[0017] The mounting sleeve is fitted onto the motor shaft of the drive motor;

[0018] The mounting cylinder has an axial guide groove on its inner wall away from the drive motor;

[0019] The threaded rod is in sliding engagement with the mounting cylinder;

[0020] The threaded rod is provided with a guide bar that slides in conjunction with the guide groove.

[0021] Optionally, a lubrication unit is provided between the sidewall of the guide groove and the side of the guide strip;

[0022] The lubrication unit includes a sliding bar, a mounting bracket, and an oil-soaked sponge, wherein:

[0023] The sliding bar is slidably positioned on the inner wall of the guide groove near the drive motor, and slides in cooperation with the inner wall of the guide groove in a direction perpendicular to the axis of the threaded rod.

[0024] The placement rack is provided in pairs, and the pair of placement racks are respectively placed at both ends of the sliding bar;

[0025] The inner wall of the guide groove is provided with a placement groove for accommodating the placement rack on the opposite side wall;

[0026] The oil-soaked sponge is positioned on the shelf near the sliding bar.

[0027] Optionally, a lubrication plate is provided at the opening of the placement groove;

[0028] The lubrication plate is provided with multiple oil leakage holes.

[0029] Optionally, the oil-soaked sponge is fixed to the placement rack by screws.

[0030] Optionally, an oil baffle ring is provided on the side of the placement slot near the drive motor;

[0031] The placement bracket is located inside the oil baffle ring.

[0032] Optionally, the sliding bar is provided with mounting holes;

[0033] The placement rack is provided with a mounting rod that is inserted into the mounting hole;

[0034] The mounting rod is detachably connected to the inside of the mounting hole.

[0035] Optionally, the inner wall of the mounting hole is provided with a plug-in hole along the axial direction;

[0036] The inner wall of the mounting hole is provided with a limiting groove along the circumference;

[0037] The mounting rod is provided with a limiting strip that slides into the insertion hole.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. By driving a motor to rotate a threaded rod, the axial movement of the sliding working shaft is achieved through the threaded connection between the threaded rod and the threaded sleeve, thereby precisely controlling the feed and retraction of the cutter head. This precise control ensures that the cutter head is always in the optimal position during pelletizing, improving pelletizing accuracy and quality, reducing pelletizing errors and unevenness, and increasing the final product yield.

[0040] 2. A lubrication unit is installed between the guide groove and the guide bar to lubricate the contact surface during threaded rod operation, reducing frictional loss and extending the service life of the threaded rod and the mounting sleeve. The lubrication unit uses the mutual compression of the oil-impregnated sponge and the lubrication plate to evenly apply lubricating oil to the contact surface, forming an effective lubrication layer and reducing wear caused by friction. Simultaneously, excess lubricating oil flows back to the oil-impregnated cavity for the oil-impregnated sponge to reabsorb, reducing lubricating oil loss and improving lubrication efficiency and economy.

[0041] 3. The oil-impregnated sponge is fixed to the mounting bracket with screws. The sliding strip and the mounting bracket are connected by a plug-in joint and are detachable, making the installation and maintenance of the lubrication unit more convenient. This design not only facilitates the inspection, replacement, and maintenance of the lubrication unit by the staff, but also improves the operability and reliability of the device, reduces downtime caused by inconvenient installation and maintenance, and improves production efficiency. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0043] Figure 2 This is a schematic diagram illustrating the position of the threaded sleeve in an embodiment of this application.

[0044] Figure 3 This is a schematic diagram illustrating the mounting cylinder structure in an embodiment of this application.

[0045] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0046] Figure 5 This is a schematic diagram illustrating the position of the blocking ring in an embodiment of this application.

[0047] Figure 6 This is a schematic diagram illustrating the structure of the lubrication unit in the embodiments of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Sliding working shaft; 2. Protective sleeve; 3. Threaded sleeve; 4. Threaded rod; 5. Adjusting sleeve; 6. Drive motor; 7. Adapter; 8. Moving part; 81. Mounting sleeve; 82. Guide groove; 83. Placement groove; 84. Lubrication plate; 85. Oil retaining ring; 86. Oil leakage hole; 9. Lubrication unit; 91. Sliding strip; 92. Placement rack; 93. Oil-impregnated sponge; 94. Insertion hole; 95. Limiting strip; 96. Elastic pad. Detailed Implementation

[0050] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0051] This application discloses a cutting mechanism for an underwater pelletizer pelletizing device.

[0052] The main shaft of the underwater pelletizer is a hollow shaft with a central hole along the axial direction. A sliding working shaft 1 passes through the central hole of the main shaft. Both ends of the sliding working shaft 1 extend from both ends of the main shaft. A cutter disc is fixedly connected to one end of the sliding working shaft 1.

[0053] An underwater pelletizer pelletizing device is provided with a feed mechanism and a sliding working shaft 1 on the main shaft, which is used to move the sliding working shaft 1 axially to complete the feed and retraction actions.

[0054] An underwater pelletizer pelletizing device includes a feed mechanism comprising a protective cylinder 2, a threaded sleeve 3, a threaded rod 4, an adjusting cylinder 5, and a drive motor 6. The protective cylinder 2 is mounted on the end of the main shaft motor and coaxially sleeved outside the sliding working shaft 1. The threaded sleeve 3 is coaxially mounted on the end of the protective cylinder 2. The threaded rod 4 passes through the threaded sleeve 3 and is threadedly connected to it. One end of the threaded rod 4 is coaxial with the sliding working shaft 1 and rotatably engages with it via an adapter 7. An adjusting cylinder 5 is coaxially mounted on the end of the protective cylinder 2 near the threaded sleeve 3, and is coaxially sleeved outside the threaded rod 4. The drive motor 6 is fixedly mounted on the end of the adjusting cylinder 5 away from the protective cylinder 2. The motor shaft of the drive motor 6 is coaxial with the adjusting cylinder 5, passes through the adjusting cylinder 5, and engages with the threaded rod 4. The axial distance between the motor shaft of the drive motor 6 and the threaded rod 4 is adjustable.

[0055] When the sliding working shaft 1 needs to move axially to complete the feed and retraction actions, the drive motor 6 drives the threaded rod 4 to rotate. Since the threaded rod 4 and the threaded sleeve 3 are threadedly connected, and the threaded sleeve 3 is fixed to the end of the protective cylinder 2, the threaded rod 4 moves axially with the threaded sleeve 3 when it rotates. By controlling the rotation direction of the threaded rod 4, the direction of its axial movement is controlled, thereby causing the threaded rod 4 to drive the sliding working shaft 1 to move, thus completing the feed and retraction actions. Since both the threaded rod 4 and the sliding working shaft 1 are rotatably engaged with the adapter 7, the possibility of the sliding working shaft 1 affecting the operation of the threaded rod 4 when it rotates is reduced.

[0056] To facilitate the axial movement of the motor shaft of the drive motor 6 and the threaded rod 4 along the threaded rod 4, the motor shaft of the drive motor 6 and the threaded rod 4 are connected by a movable part 8.

[0057] The movable component 8 includes a mounting sleeve 81. One end of the mounting sleeve 81 is coaxially sleeved on the end of the motor shaft of the drive motor 6 and fixedly connected to the motor shaft of the drive motor 6. The other end of the mounting sleeve 81 is coaxially sleeved on the end of the threaded rod 4 and fixed to the end of the threaded rod 4.

[0058] The end of the mounting cylinder 81 furthest from the drive motor 6 has a guide groove 82 along its axial direction. The threaded rod 4 has a guide bar, and the guide bar and the guide groove 82 are in sliding engagement. The motor shaft of the drive motor 6 drives the mounting cylinder 81 to rotate. The inner wall of the guide groove 82 on the mounting cylinder 81 drives the threaded rod 4 to rotate through the guide bar. When the threaded rod 4 moves along its own axial direction, the guide bar moves inside the guide groove 82.

[0059] Since the rotation of the threaded rod 4 around its own axis and its movement along its own axis are synchronous, when the threaded rod 4 moves, one end of the guide bar is likely to come into close contact with one side of the guide groove 82, which can easily cause friction between the guide bar and the inner wall of the guide groove 82. After a long period of contact between the guide bar and the groove wall of the guide groove 82, the guide bar and the inner wall of the guide groove 82 will experience some wear, thus affecting the working accuracy of the threaded rod 4.

[0060] In order to reduce friction between the guide bar and the guide groove 82 and extend the service life of the threaded rod 4 and the mounting sleeve 81, a lubrication unit 9 is provided between the guide groove 82 and the guide bar. When the threaded rod 4 is working, the lubrication unit 9 lubricates the contact surface between the guide bar and the groove wall of the guide groove 82.

[0061] The lubrication unit 9 includes a sliding bar 91, a mounting bracket 92, and an oil-soaked sponge 93. There is a pair of mounting brackets 92, which are respectively installed at both ends of the sliding bar 91. The sliding bar 91 and the mounting brackets 92 are arranged in a U-shape. The oil-soaked sponge 93 is installed on the side of the mounting brackets 92 that are close to each other.

[0062] The sliding bar 91 is installed on the inner wall of the guide groove 82 on the side close to the drive motor 6. The sliding bar 91 and the inner wall of the guide groove 82 move in a direction perpendicular to the axis of the drive motor 6.

[0063] Each guide groove 82 has a placement groove 83 on one side that is close to the other. A lubrication plate 84 is provided at the opening of the placement groove 83, and the lubrication plate 84 has multiple oil leakage holes 86. An oil baffle ring 85 is provided on the side of the placement groove 83 that is close to the drive motor 6. An oil immersion cavity is formed between the guide groove 82, the oil baffle ring 85 and the lubrication plate 84.

[0064] Both the placement rack 92 and the oil-soaked sponge 93 are placed inside the oil-soaking cavity. The placement rack 92 is placed inside and passes through the oil-blocking ring 85. When the sliding strip 91 slides, it drives the placement rack 92 to move inside the oil-blocking ring 85. The oil content of the oil-soaked sponge 93 is maintained by injecting lubricating oil into the oil-soaking cavity.

[0065] As the oil-impregnated sponge 93 moves toward the lubrication plate 84, the sponge 93 and the lubrication plate 84 press against each other. The pressed sponge 93 squeezes out the lubricating oil, which seeps out through the oil drain hole 86 on the lubrication plate 84. This lubricates the contact surface between the lubrication plate 84 and the guide strip, reducing friction loss and extending the service life of the lubrication plate 84 and the mounting cylinder 81. The excess lubricating oil squeezed out is blocked by the lubrication plate 84 and flows into the oil-impregnation cavity, allowing the sponge 93 to reabsorb the lubricating oil, thereby reducing lubricating oil consumption.

[0066] When the drive motor 6 drives the mounting cylinder 81 to move, the sliding bar 91 is thrown in the opposite direction of the rotation of the mounting cylinder 81. At this time, the oil-impregnated sponge 93 close to the contact surface between the guide bar and the lubrication plate 84 moves toward the lubrication plate 84 to specifically lubricate the guide bar, thereby improving the lubrication effect and reducing the consumption of lubricating oil.

[0067] The oil-impregnated sponge 93 is fixed to the placement rack 92 with screws, thereby improving the convenience and stability of installing the oil-impregnated sponge 93 on the placement rack 92.

[0068] The sliding bar 91 has a mounting hole, and the mounting bracket 92 has a mounting rod that is inserted into the mounting hole. The mounting rod is detachably connected to the inside of the mounting hole. The inner wall of the mounting hole has an axial insertion hole 94, and the inner wall of the mounting hole has a circumferential limiting groove. The mounting rod has a limiting strip 95 that slides into the insertion hole 94.

[0069] After placing the sliding strip 91 inside the guide groove 82, place the placement bracket 92 in the placement groove 83 and pass the placement bracket 92 through the oil baffle ring 85 so that the placement bracket 92 is inserted into the insertion hole 94. Then, rotate the placement bracket 92 so that the limiting strip 95 is placed in the limiting groove and the limiting strip 95 is limited by the groove wall of the limiting groove, thereby completing the installation of the placement bracket 92.

[0070] Elastic pads 96 are provided at both ends of the sliding strip 91 to buffer the force of the sliding strip 91 impacting the mounting cylinder 81, extend the service life of the sliding strip 91 and the mounting cylinder 81, and reduce noise. Depending on the rotation speed, the elastic pads 96 are compressed to different degrees, and thus the oil-impregnated sponge 93 is compressed to different degrees, thereby controlling the oil output.

[0071] The implementation principle of the feeding mechanism for an underwater pelletizer pelletizing device according to an embodiment of this application is as follows: When the feeding mechanism is working, the drive motor 6 drives the threaded rod 4 to rotate. The threaded rod 4 is threadedly connected to the threaded sleeve 3 fixed at the end of the protective cylinder 2. Therefore, it moves axially during rotation, thereby driving the sliding working shaft 1 to move and complete the feeding and retraction actions. The motor shaft of the drive motor 6 is connected to the threaded rod 4 through a movable part 8. One end of the mounting cylinder 81 is fixed to the end of the motor shaft, and the other end is fixed to the end of the threaded rod 4. The end of the mounting cylinder 81 away from the motor is provided with a guide groove 82 along the axis. The guide strip on the threaded rod 4 slides in cooperation with the guide groove 82. In order to reduce the friction between the guide strip and the inner wall of the guide groove 82 and extend the service life, a lubrication unit 9 is provided between the guide groove 82 and the guide strip. When the threaded rod 4 is working, the lubrication unit 9 lubricates the contact surface. The sliding strip 91 in the lubrication unit 9 is installed on the inner wall of the guide groove 82 near the motor. The placement brackets 92 at both ends are U-shaped, and the oil-soaked sponge 93 is installed on the side of the placement brackets 92 that are close to each other. The placement rack 92 and the oil-soaked sponge 93 are located in the oil-soaking cavity formed by the guide groove 82, the oil-blocking ring 85, and the lubrication plate 84. The oil content of the oil-soaked sponge 93 is maintained by injecting lubricating oil into this cavity. When the oil-soaked sponge 93 moves toward the lubrication plate 84 and is squeezed, the lubricating oil seeps out from the oil leakage hole 86 to lubricate the contact surface. Excess lubricating oil flows back to the oil-soaking cavity for the oil-soaked sponge 93 to absorb again, reducing wear.

[0072] 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 cutting mechanism for an underwater pelletizer pelletizing device, the cutting mechanism being used to drive a sliding working shaft (1) to move along its own axis, characterized in that: The feed mechanism includes a protective sleeve (2), a threaded sleeve (3), a threaded rod (4), an adjusting sleeve (5), and a drive motor (6), wherein: The protective cylinder (2) is located outside the sliding working shaft (1); The threaded sleeve (3) is provided on the protective cylinder (2); The threaded rod (4) is rotatably engaged with the sliding working shaft (1) via an adapter (7). The threaded rod (4) passes through the threaded sleeve (3) and is threadedly connected to the threaded sleeve (3); The adjusting cylinder (5) is located outside the protective cylinder (2) and is sleeved outside the threaded rod (4); The drive motor (6) is mounted on the adjusting cylinder (5) and is connected to the threaded rod (4) in a transmission manner; The axial spacing between the motor shaft of the drive motor (6) and the threaded rod (4) is adjustable.

2. The feed mechanism for an underwater pelletizer pelletizing device according to claim 1, characterized in that: A movable part (8) is provided between the drive motor (6) and the threaded rod (4); The movable component (8) includes a mounting sleeve (81), wherein: The mounting sleeve (81) is sleeved on the motor shaft of the drive motor (6); The mounting cylinder (81) has a guide groove (82) on its inner wall away from the drive motor (6) along the axial direction. The threaded rod (4) is in sliding engagement with the mounting sleeve (81); The threaded rod (4) is provided with a guide bar that slides in cooperation with the guide groove (82).

3. The feed mechanism for an underwater pelletizer pelletizing device according to claim 2, characterized in that: A lubrication unit (9) is provided between the side wall of the guide groove (82) and the side of the guide strip. The lubrication unit (9) includes a sliding bar (91), a mounting bracket (92), and an oil-soaked sponge (93), wherein: The sliding bar (91) is slidably placed on the inner wall of the guide groove (82) near the drive motor (6), and slides in cooperation with the inner wall of the guide groove (82) along a direction perpendicular to the axis of the threaded rod (4); The placement rack (92) is provided in pairs, and the pair of placement racks (92) are respectively placed at both ends of the sliding bar (91); The guide groove (82) has a placement groove (83) on the opposite side wall of the inner wall to accommodate the placement rack (92). The oil-soaked sponge (93) is located on the placement rack (92) near the sliding bar (91).

4. The feed mechanism for an underwater pelletizer pelletizing device according to claim 3, characterized in that: A lubrication plate (84) is provided at the opening of the placement groove (83); The lubrication plate (84) is provided with multiple oil leakage holes (86).

5. The feed mechanism for an underwater pelletizer pelletizing device according to claim 3, characterized in that: The oil-soaked sponge (93) is fixed to the placement rack (92) by screws.

6. The feed mechanism for an underwater pelletizer pelletizing device according to claim 3, characterized in that: An oil baffle ring (85) is provided on the side of the placement slot (83) near the drive motor (6); The placement rack (92) is placed inside the oil baffle ring (85).

7. The feed mechanism for an underwater pelletizer pelletizing device according to claim 3, characterized in that: The sliding bar (91) is provided with mounting holes; The placement rack (92) is provided with a mounting rod that is inserted into the mounting hole; The mounting rod is detachably connected to the inside of the mounting hole.

8. The feed mechanism for an underwater pelletizer pelletizing device according to claim 7, characterized in that: The inner wall of the mounting hole is provided with a plug-in hole (94) along the axial direction. The inner wall of the mounting hole is provided with a limiting groove along the circumference; The mounting rod is provided with a limiting strip (95) that slides in conjunction with the insertion hole (94).

Images