Rotary joint

Abstract

The utility model relates to the technical field of centrifugal casting, in particular to a rotating joint which comprises an upper joint and a rotating sleeve, the interior of the upper joint is communicated to form a through hole, an installation space is formed in the rotating sleeve, and a water inlet hole coaxial with and communicated with the through hole is formed in the rotating sleeve. The rotating sleeve is arranged in the mounting space, and a rotating piece is arranged on the periphery of the rotating sleeve; wherein the other end of the rotating sleeve is connected with a water inlet pipe, a filtering structure is arranged between the interior of the rotating sleeve and the water inlet pipe, two deep groove ball bearings are adopted to be placed at the two ends of the upper connector, therefore, force generated by pulling a rubber pipe back and forth can be borne more greatly, and due to the fact that the two bearings bear the force, the sealing ring can be protected from being damaged easily; a filtering structure is further arranged between the rotating connector and the water inlet pipe, water flow can be filtered through the arrangement of a plurality of filtering layers, and the situation that impurities containing floating objects enter the centrifugal machine to pollute samples and the like is prevented.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal casting technology, and in particular to a rotary joint. Background Technology

[0002] A centrifuge is a device that uses centrifugal force to separate different components in a mixture. Its working principle is that rapid rotation causes different components in the mixture to separate under the action of centrifugal force due to their density differences. The rotary joint is a mechanical device that allows fluids (such as gases, liquids, or mixtures) to be transferred between two parts of the rotating system. The centrifuge is connected to the water inlet pipe through the rotary joint and hose, and can be used for sample processing and internal cleaning.

[0003] The rotary joint design prevents the hose from being pulled and worn. For example, Chinese Patent Publication No. CN215539057U discloses a rotary joint filter structure for papermaking, including a first conduit, with a second conduit connected to the end of the first conduit. The upper and lower sidewalls of the second conduit have grooves, and a first screw and a second screw are located within the two grooves. A rotating wheel is located above the second conduit, and the rotating wheel is rotatably connected to a rotating shaft. The rotating shaft passes through the top wall of the second conduit and is connected to a bevel gear. The bottom end of the rotating shaft is fixed to the inner wall of the second conduit. This invention, by rotating the rotating wheel, drives the rotating shaft, bevel gear one, and bevel gear two to rotate, thereby driving the transmission shaft and the first screw to rotate. This causes the first slider to slide, the second slider to slide on the second screw, and the filter plate to move, facilitating changes in the filter plate position. The sleeve, movable rod, and spring provide shock absorption for the first conduit. The movable rod drives the third and fourth sliders to slide on the sliding rod, further enhancing shock absorption.

[0004] In actual operation, the filter plate is moved by the screw and bevel gear inside the second conduit. However, the screw and bevel gear are not easy to maintain after long-term use, and they accelerate the corrosion rate in humid environments. In addition, the screw and bevel gear will increase the production cost of the rotary joint, resulting in poor practicality. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing rotary joints, such as high production cost and short lifespan, and to propose a rotary joint.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a rotary joint, including an upper joint and a rotating sleeve. The interior of the upper joint is connected to form a through hole. The interior of the rotating sleeve forms an installation space and a water inlet hole that is coaxial with and connected to the through hole. The rotating sleeve is disposed in the installation space and has a rotating component on its periphery.

[0008] The other end of the rotating sleeve is connected to the water inlet pipe, and a filter structure is provided inside the sleeve and between it and the water inlet pipe.

[0009] Furthermore, the rotating component includes a thrust ball bearing and a pair of deep groove ball bearings. A stop is fixedly connected to the periphery of the upper connector end, and the periphery of its end is also provided with the thrust ball bearing and a deep groove ball bearing.

[0010] The thrust ball bearing abuts against the stop portion, and a spacer is provided between the thrust ball bearing and the deep groove ball bearing on the adjacent side.

[0011] Furthermore, another deep groove ball bearing is fixedly connected to the periphery of the other end of the upper connector via a clamping plate, wherein the inner bottom of the rotating sleeve extends towards the midpoint to form a continuous stepped portion, the stepped portion abutting against the upper connector and the deep groove ball bearing.

[0012] A first sealing element is provided between the stepped portion and the upper connector.

[0013] Furthermore, a pressure cap is fixed to the port of the rotating sleeve by fasteners. The pressure cap avoids the upper connector through a central through hole. The pressure cap abuts against the deep groove ball bearing located at the top, and a second seal is provided between the pressure cap and the upper connector.

[0014] Furthermore, the filter structure includes a support member, the rotating sleeve has a recessed portion at one end away from the upper connector, the support member has a columnar structure, and has an opening at one end near the recessed portion, and an extension portion extending outward from the side of the opening, the support member is disposed in the water inlet hole, and the extension portion abuts against the recessed portion and the water inlet pipe respectively.

[0015] Furthermore, a plurality of filter layers are provided inside the support member, wherein the extension portion is flush with the end of the rotating sleeve.

[0016] The rotary joint proposed in this utility model has the following advantages: It uses two deep groove ball bearings at both ends of the upper joint, which can better withstand the force generated by the back-and-forth pulling of the hose. Furthermore, the two bearings protect the sealing ring, making it less prone to damage. The pressure cap, together with the stop part, fixes the upper joint and the rotating sleeve. Additionally, a sealing element is provided between the upper joint and the rotating sleeve to further improve the sealing effect. Moreover, a filter structure is provided between the rotary joint and the water inlet pipe. The multiple filter layers can filter the water flow, preventing impurities containing floating matter from entering the centrifuge and causing sample contamination. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the filter structure of this utility model.

[0019] In the diagram: 1. Upper connector; 11. Through hole; 12. Stop; 2. Rotating sleeve; 21. Water inlet; 22. Stepped section; 23. First seal; 24. Recess; 3. Rotating component; 31. Thrust ball bearing; 32. Deep groove ball bearing; 4. Filter structure; 41. Support component; 42. Extension; 43. Filter layer; 5. Spacer; 6. Clamping plate; 7. Pressure cap; 71. Second seal. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-2 A rotary joint includes an upper connector 1 and a rotating sleeve 2. The upper connector 1 has an internal through hole 11, the rotating sleeve 2 has an internal installation space, and a water inlet hole 21 that is coaxial with and connected to the through hole 11. The rotating sleeve 2 is disposed in the installation space and has a rotating component 3 on its periphery.

[0022] The other end of the rotating sleeve 2 is connected to the water inlet pipe, and a filter structure 4 is provided inside the sleeve and between the sleeve and the water inlet pipe.

[0023] Furthermore, the rotating component 3 includes a thrust ball bearing 31 and a pair of deep groove ball bearings 32. The upper connector 1 is fixedly connected to a stop part 12 at its outer periphery, and the thrust ball bearing 31 and a deep groove ball bearing 32 are also provided at its outer periphery.

[0024] The thrust ball bearing 31 abuts against the stop portion 12, and a spacer 5 is provided between the thrust ball bearing 31 and the deep groove ball bearing 32 on the adjacent side.

[0025] It should be added that a spacer 5 is provided between the thrust ball bearing 31 and the deep groove ball bearing 32, which can be used to adjust the axial spacing between the bearings, ensure the correct position of the bearings on the shaft, avoid direct contact between the bearings, reduce friction and wear, and extend the service life of the bearings.

[0026] Furthermore, another deep groove ball bearing 32 is fixedly connected to the outer periphery of the other end of the upper connector 1 via a clamping plate 6. The inner bottom of the rotating sleeve 2 extends towards the midpoint to form a continuous stepped portion 22, which abuts against the upper connector 1 and the deep groove ball bearing 32.

[0027] A first sealing element 23 is provided between the stepped portion 22 and the upper connector 1.

[0028] In this embodiment, a flange is fixedly connected to the end of the upper connector 1 away from the rotating sleeve 2. After the flange is removed, the cover 7 can be disassembled. The fastener is a countersunk bolt.

[0029] Furthermore, the stop part 12 is fixedly connected to the upper connector 1, the deep groove ball bearing 32 abuts against the stop part 12, and because the pressure cover 7 abuts against the top thrust ball bearing 31, the upper connector 1 and the rotating sleeve 2 can be fixed.

[0030] The first seal 23 and the second seal 71 can further improve the sealing between the upper connector 1 and the rotating sleeve 2.

[0031] More specifically, a pressure cap 7 is fixed to the port of the rotating sleeve 2 by fasteners. The pressure cap 7 avoids the upper connector 1 through the central through hole. The pressure cap 7 abuts against the deep groove ball bearing 32 located at the top. A second seal 71 is provided between the pressure cap 7 and the upper connector 1.

[0032] In general, the filter structure 4 includes a support member 41, the rotating sleeve 2 has a recessed portion 24 at one end away from the upper connector 1, the support member 41 has a columnar structure, and has an opening at one end near the recessed portion 24, and an extension portion 42 extending outward from the side of the opening. The support member 41 is disposed in the water inlet hole 21, and the extension portion 42 abuts against the recessed portion 24 and the water inlet pipe respectively.

[0033] The recessed portion 24 is coaxially arranged with the rotating sleeve 3, and the recessed portion 24 has a circular structure.

[0034] Finally, several filter layers 43 are provided inside the support member 41, wherein the extension portion 42 is flush with the end of the rotating sleeve 2.

[0035] It is worth mentioning that the filter layer 43 includes a filter screen, an activated carbon plate, and a quartz filter plate. The filter layer 43 can filter out floating matter and fine particles in the water flow.

[0036] The advantage of the fact that the support member 41 does not contact the upper connector 1 and the support member 41 is that it is flush with the end of the rotating sleeve 2. On the one hand, it prevents the support member 41 from moving due to lack of contact, and on the other hand, it prevents the support member 41 from protruding and causing the rotating sleeve 2 and the water inlet pipe to not fit and be fixed.

[0037] Working method: During operation, the support member 41 with the internal filter layer 43 is placed in the water inlet 21, and the extension 42 at one end of the support member 41 is stopped by the recess 24. After the rotating sleeve 2 is connected to the water inlet pipe, the support member 41 can be fixed. The water flow can be filtered through the support member 41 and the filter layer 43.

[0038] Among them, the outer periphery of the upper connector 1 is provided with a thrust ball bearing 31 and a deep groove ball bearing 32 through the stop part 12. Since the pressure cover 7 abuts against the thrust ball bearing 31 at the top, the upper connector 1 and the rotating sleeve 2 can be fixed.

[0039] Finally, after connecting the upper connector 1 to the steel pipe, it can be used.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rotary joint, comprising an upper joint (1) and a rotating sleeve (2), characterized in that: The upper connector (1) has an internal through hole (11) and the rotating sleeve (2) has an internal installation space and a water inlet hole (21) that is coaxial with and connected to the through hole (11). The rotating sleeve (2) is located in the installation space and has a rotating part (3) on its periphery. The other end of the rotating sleeve (2) is connected to the water inlet pipe, and a filter structure (4) is provided between the sleeve and the water inlet pipe.

2. A rotary joint according to claim 1, characterized in that: The rotating component (3) includes a thrust ball bearing (31) and a pair of deep groove ball bearings (32). The upper connector (1) is fixedly connected to a stop (12) at its outer periphery, and the thrust ball bearing (31) and a deep groove ball bearing (32) are also provided at its outer periphery. The thrust ball bearing (31) abuts against the stop portion (12), and a spacer (5) is provided between the thrust ball bearing (31) and the deep groove ball bearing (32) on the adjacent side.

3. A rotary joint according to claim 2, characterized in that: The outer periphery of the other end of the upper connector (1) is fixedly connected to another deep groove ball bearing (32) by a clamping plate (6). The inner bottom of the rotating sleeve (2) extends towards the midpoint to form a continuous stepped portion (22), which abuts against the upper connector (1) and the deep groove ball bearing (32). A first sealing element (23) is provided between the stepped portion (22) and the upper connector (1).

4. A rotary joint according to claim 3, characterized in that: A pressure cap (7) is fixed to the port of the rotating sleeve (2) by fasteners. The pressure cap (7) avoids the upper connector (1) through the central through hole. The pressure cap (7) abuts against the deep groove ball bearing (32) located at the top. A second seal (71) is provided between the pressure cap (7) and the upper connector (1).

5. A rotary joint according to claim 1, characterized in that: The filter structure (4) includes a support member (41). The rotating sleeve (2) has a recess (24) at one end away from the upper connector (1). The support member (41) has a columnar structure and an opening at one end near the recess (24). An extension (42) extends outward from the side of the opening. The support member (41) is located inside the water inlet (21). The extension (42) abuts against the recess (24) and the water inlet pipe, respectively.

6. A rotary joint according to claim 5, characterized in that: Several filter layers (43) are provided inside the support member (41), wherein the extension (42) is flush with the end of the rotating sleeve (2).

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