A high gravity centrifuge basket pin shaft assembling and disassembling tool

Abstract

The application discloses a kind of supergravity centrifuge basket pin shaft loading and unloading tools, including pin shaft basket device, pin shaft feeding device;Pin shaft basket device is installed between two sub-connectors, pin shaft is movably installed in pin shaft basket device;Pin shaft feeding device includes positioning device, nut, feed shaft.The rotating pair formed by the nut and the feed shaft is used to convert rotary motion into linear motion in the application, and the pin shaft feeding device is designed to act on the pin shaft, avoiding the uneven stress problem caused by manual operation in the traditional method, and realizing the stable entry and exit of the pin shaft.The pin shaft basket device is designed to ensure that the pin shaft is always coaxial with the pin shaft hole during movement, avoiding the pin shaft axis and pin shaft hole axis not parallel during the lifting process of traditional method, and realizing the horizontal support of pin shaft.In the application, the combination of pin shaft feeding device and pin shaft basket device removes human factors, and the installation and disassembly process is more stable, with significantly improved efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifuge technology, and in particular to a tool for loading and unloading the basket pin of a supergravity centrifuge. Background Technology

[0002] A centrifuge is an experimental device used for physical simulation experiments. It simulates a hypergravity environment through centrifugal force generated by the high-speed rotation of the centrifuge arm. With the deepening research into the time- and scale-compression equivalence mechanisms of hypergravity, centrifuges are finding increasingly widespread applications. Increased demand has driven the development of centrifuges towards large-scale and multi-functional designs. To adapt to the experimental needs of different setups, different specifications of baskets are used to conduct centrifugation experiments with varying g-values ​​and capacities. Therefore, basket installation and disassembly have become crucial aspects of centrifuge operation.

[0003] The currently developed centrifuge is equipped with multiple baskets of varying sizes and weights, with some baskets weighing over 10 tons and measuring over 3 meters in each direction. The connecting pin between the basket and the rotating arm has a diameter of φ400mm, a length of 1000mm, and weighs approximately 1 ton. The weight and size make manual operation impossible. Furthermore, the core challenge in installing and disassembling the baskets is achieving precise alignment of the rotating arm pin holes and the basket pin holes with a coaxiality of at least 0.01mm. Since the baskets, rotating arms, and pins are all high-load-bearing components, drilling for positioning is not permitted, further complicating the problem of accurate alignment.

[0004] The traditional method is as follows: When disassembling the suspended platform, jacks are used to lift the platform vertically, relieving the pin from its vertical tension. The pin is then pushed out of its hole using a hammering method or another set of jacks, and the platform and pin are lifted away from the boom. When installing the suspended platform, a crane is used to lift the platform and place it on four pre-positioned jacks. The jacks are used to make minor vertical adjustments to the platform's position, aligning the platform's pin hole with the boom's pin hole. The crane lifts the pin, and the pin is manually pushed into the boom's pin hole, guided into the platform's pin hole by the chamfer on the pin. The pin is then hammered into place.

[0005] The disadvantages of the aforementioned traditional technologies are:

[0006] When using overhead cranes and manual labor to lift and axially position the pin, especially at the beginning of installation or the end of unloading, the pin's center of gravity is outside the pin hole, causing it to tilt under gravity. At this time, relying solely on the chamfer on the pin for guidance, or manually striking or using a jack to move the pin into or out of the pin hole, can easily cause the pin to jam, resulting in incalculable losses. Furthermore, traditional methods are inefficient, with the installation and dismantling of the suspended platform taking anywhere from 3 days to a week.

[0007] The reasons for the above-mentioned shortcomings are:

[0008] During the initial installation or final unloading using a crane, the center of gravity of the pin is outside the pin hole, causing it to tilt under gravity and become cantilevered, with the pin axis not parallel to the pin hole axis. Manually striking or using a jack to move the pin into or out of the pin hole at this time can easily cause uneven circumferential force, leading to jamming. Furthermore, manual operation relies heavily on the worker's skill and experience, resulting in low efficiency.

[0009] Therefore, a tool for loading and unloading the pins of a centrifuge basket in ultragravity was developed to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to design a tool for loading and unloading the pin shaft of a centrifuge basket in order to solve the above-mentioned problems.

[0011] The present invention achieves the above objectives through the following technical solutions:

[0012] A tool for loading and unloading pins in a centrifuge basket is provided for loading and unloading pins in a first pin hole in a rotating arm and a second pin hole in the basket. The rotating arm includes at least one set of connectors, each connector including two sub-connectors, both of which are provided with a first pin hole. The tool for loading and unloading pins includes:

[0013] A pin support basket device for guiding the movement of the pin; the pin support basket device is installed between two sub-connectors, and the pin is movably installed inside the pin support basket device.

[0014] A pin feed device includes a positioning device, a nut, and a feed shaft. The positioning device is installed on the outside of the sub-connector. The nut is rotatably installed on the positioning device with its axial position unchanged. The feed shaft is threaded, and the nut and the feed shaft are combined to form a threaded pair. One end of the feed shaft is connected to one end of the pin installed in the pin support basket device. The pin, the first pin hole, the feed shaft, and the nut installed in the pin support basket device are all coaxially arranged.

[0015] The beneficial effects of this invention are as follows:

[0016] This application utilizes a rotating pair formed by the nut and the feed shaft to convert rotational motion into linear motion. A pin feed device is designed to act on the pin, avoiding problems such as uneven force on the pin caused by manual operation in traditional methods, and realizing stable entry and exit of the pin.

[0017] This application designs a pin support basket device, which ensures that the pin is always coaxial with the pin hole during movement, avoiding the problem of the pin axis not being parallel to the pin hole axis during the crane lifting process in traditional methods, and realizing horizontal support of the pin.

[0018] In this application, the combined use of the pin feed device and the pin support basket device eliminates human factors, making the installation and disassembly process more stable and significantly improving efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram (perspective view) of the installation structure of the present invention;

[0020] Figure 2 This is a schematic diagram (sectional view) of the installation structure of the present invention;

[0021] Figure 3 This is a schematic diagram (perspective view) of the pin-shaft support basket device in this invention;

[0022] Figure 4 This is a structural schematic diagram (sectional view) of the pin shaft feeding device in this invention;

[0023] In the diagram: 1-Rotating arm; 2-Pin shaft basket support device; 3-Pin shaft; 4-Basket; 5-Pin shaft feed device; 6-Handwheel; 7-Nut; 8-Bearing; 9-Feed shaft; 91-Flange; 92-Screw; 10-Bearing seat; 11-Tie rod and nut assembly; 12-Basket body; 13-Slider; 14-Guide rail; 15-First stop; 16-Second stop. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to 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 invention.

[0028] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1 As shown, a centrifuge arm 1 includes a set of connectors, each connector having two sub-connectors, each with a first pin hole. The basket 4 also includes two connecting parts, each with a second pin hole. This application uses pins 3 for mounting and dismounting in the first pin holes of the arm 1 and the second pin holes of the basket 4. Each sub-connector and each basket 4 requires a pin 3 for connection. The installation of two pins 3 on one basket 4 requires a pin support device 2 and two pin feeding devices 5, which are respectively mounted on the two sub-connectors.

[0032] like Figure 1-4 As shown, a tool for loading and unloading pins of a centrifuge basket in a supergravity environment is provided. The tool includes:

[0033] A pin support basket device 2 is used for guiding the movement of the pin 3. The pin support basket device 2 includes a basket body 12, two guide rails 13, and four sliders 14. The two guide rails 13 are installed parallel to each other at the bottom of the basket body 12, and the two sliders 13 are slidably mounted on one guide rail 14. The pin 3 is mounted on the sliders 13. The middle part of the basket body 12 is formed into a U-shaped groove structure, and both ends of the basket body 12 are formed into annular structures. A second stop 16 is provided on the inner side of the upper end of the annular structure, and a first stop 15 is provided on the inner side wall of the sub-connector. The first stop 15 and the second stop 16 are connected. Here, the horizontal support of the pin 3 is achieved by utilizing the guiding effect of the linear pair formed by the sliders 13 and the guide rails 14. Through precision machining and installation, it can be ensured that after the pin 3 is in place, the axis of the pin 3 is coaxial with the axis of the circular stop of the basket body 12.

[0034] The pin feed device 5 includes a positioning device, a nut 7, and a feed shaft 9. The positioning device includes a bearing housing 10, a bearing 8, and multiple screws 92. The bearing housing 10 supports rotation and is clamped and fixed to the sub-connector by multiple tie rod nut combinations 11 to form radial positioning. The bearing housing 10 has a through hole at its center. The bearing 8 is installed inside the bearing housing 10. The outer wall of the nut 7 is connected to the inner ring of the bearing 8. The feed shaft 9 is provided with external threads. The nut 7 and the feed shaft 9 are combined to form a threaded pair. One end of the feed shaft 9 is provided with a flange 91. The flange 91 is provided with multiple through holes. Correspondingly, multiple screw holes are provided on the pin 3. The feed shaft 9 and the pin 3 are connected through multiple screw holes. The pin 3, the first pin hole, the feed shaft 9, the nut 7, and the bearing 8 installed in the pin support basket device 2 are all coaxially arranged.

[0035] Handwheel 6; Handwheel 6 is connected to the outer end face of nut 7, and handwheel 6 and nut 7 are coaxially arranged.

[0036] In some embodiments, both the first stop 15 and the second stop 16 are formed in an arc shape; the upper end of the annular structure is provided with a screw hole, which is used as a lifting hole.

[0037] like Figure 4 As shown, the tie rod and nut assembly 11 includes a tie rod and a tie rod nut 7. Multiple mounting through holes are radially arranged around the bearing housing 10. The first end of the tie rod has an L-shaped hook structure and hooks onto the inner edge of the middle of the sub-connector. The first end of the tie rod is formed as a screw, which passes through the mounting through hole on the bearing housing 10. The tie rod nut is then threadedly connected to the screw.

[0038] The working process of the 4-pin shaft 3 loading and unloading tool of the suspended platform is as follows:

[0039] When disassembling the pin 3, the pin support basket device 2 is hung on the first stop 15 on the inner side of the rotating arm 1, the pin feed device 5 is installed on the rotating arm 1, and the handwheel 6 is rotated to drive the nut 7 to rotate. Under the support of the bearing 8, the nut 7 converts the rotational motion into the withdrawal of the feed shaft 9. Under the support of the linear pair formed by the slider 13 and the guide rail 14 of the pin support basket device 2, the pin 3 moves out of the pin hole, completing the disassembly of the pin 3.

[0040] When installing the pin 3, the pin support basket device 2 is hung on the stop on the inner side of the rotating arm 1, and the pin feed device 5 is installed on the rotating arm 1. The handwheel 6 is rotated to drive the nut 7 to rotate. Under the support of the bearing 8, the nut 7 converts the rotational motion into the entry of the feed shaft 9. Under the support of the linear pair formed by the slider 13 and the guide rail 14 of the pin support basket device 2, the pin 3 moves into the pin hole, completing the installation of the pin 3.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tool for loading and unloading pins in a centrifuge basket, used for loading and unloading pins in a first pin hole of a rotating arm and a second pin hole of the basket, wherein the rotating arm includes at least one set of connecting members, each connecting member including two sub-connecting members, each sub-connecting member having a first pin hole; characterized in that, Pin mounting and dismounting tools include: A pin support basket device for guiding the movement of the pin; the pin support basket device is installed between two sub-connectors, and the pin is movably installed inside the pin support basket device. A pin-shaft feed device includes a positioning device, a nut, and a feed shaft. The positioning device is installed on the outside of the sub-connector. The nut is rotatably mounted on the positioning device with its axial position unchanged. The feed shaft is threaded, and the nut and feed shaft combine to form a threaded pair. One end of the feed shaft is connected to one end of a pin installed in the pin-shaft support device. The pin, the first pin hole, the feed shaft, and the nut installed in the pin-shaft support device are all coaxially arranged. The pin-shaft support device includes a basket body, two guide rails, and four sliders. The two guide rails are installed parallel to each other at the bottom of the basket body, and the two sliders can... The slide is mounted on a guide rail, and the pin is mounted on the slider; the middle part of the basket is formed into a U-shaped groove structure, and both ends of the basket are formed into annular structures. The upper inner side of the annular structure is provided with a second stop, and a corresponding first stop is provided on the inner side wall of the sub-connector. The first stop and the second stop are connected in a cooperative manner; the positioning device includes a bearing seat and a bearing. The bearing seat is installed on the outside of the sub-connector, and the bearing is installed inside the bearing seat. The outer wall of the nut is connected to the inner ring of the bearing, and the nut and the bearing are coaxially arranged; the bearing seat is clamped and fixed on the sub-connector by a combination of multiple tie rod nuts.

2. The tool for loading and unloading the pin shaft of a centrifuge basket according to claim 1, characterized in that: The pin mounting and dismounting tool includes a handwheel, which is connected to the outer end face of the nut, and the handwheel and nut are coaxially arranged.

3. The tool for loading and unloading the pin shaft of a centrifuge basket according to claim 1, characterized in that: The pin feed device also includes multiple screws. One end of the feed shaft is provided with a flange, which has multiple through holes. Correspondingly, multiple screw holes are provided on the pin shaft, and the feed shaft and the pin shaft are connected through multiple screw holes.

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