Rotary joint of centrifugal machine

Abstract

The utility model discloses a centrifuge rotary joint, which comprises a shell, a mandrel is rotatably inserted in the shell, a first bearing and a second bearing are sequentially sleeved on the mandrel from top to bottom, a connecting part is arranged at the upper end of the mandrel, a pull rod is detachably arranged on the connecting part, the connecting part is positioned above the shell, and the pull rod is detachably connected with the mandrel. An annular protection groove (not marked) is formed in the upper end of the shell, a protection ring used for protecting the connecting end and the shell is arranged in the protection groove, the upper end of the protection ring protrudes out of the upper end of the shell, a safety gap is formed between the upper end of the protection ring and the lower end of the connecting end, and a gland is detachably arranged at the lower end of the shell. A connecting lug seat is fixedly arranged at the lower end of the gland, and a connecting rod is detachably arranged on the connecting lug seat. According to the rotary joint, the technical problem that friction high temperature is generated between the connecting part of the mandrel and the shell is solved, and the production safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, specifically to a centrifuge rotary joint. Background Technology

[0002] Centrifuges are widely used in pharmaceutical, chemical, and other fields for solid-liquid separation. Vertical bag-pulling, scraper-discharge centrifuges are particularly prevalent. Current vertical bag-pulling, scraper-discharge centrifuges use a cylinder to drive a connecting rod, which in turn moves a pull rod connected to the lower edge of the filter bag up and down. Since the connecting rod does not rotate, a rotary joint is typically installed here. During actual operation, due to frequent bag-pulling movements and high-speed separation, the bearings inside the rotary joint are prone to damage. Damage can cause the spindle connection to drop and come into contact with the housing, generating friction and creating a high-temperature point, posing a safety hazard in explosion-proof areas. Therefore, a new technical solution is urgently needed to address at least one of these technical problems. Summary of the Invention

[0003] The purpose of this invention is to provide a centrifuge rotary joint that solves the technical problem of high temperature and friction between the connecting part of the spindle and the housing, thereby improving production safety.

[0004] To achieve the above technical objectives and requirements, the technical solution adopted by this utility model is as follows: a centrifuge rotary joint, comprising a housing, characterized in that a mandrel is rotatably inserted into the housing, a first bearing and a second bearing are sequentially sleeved on the mandrel from top to bottom, a connecting part is provided at the upper end of the mandrel, a pull rod is detachably provided on the connecting part, the connecting part is located above the housing, an annular protective groove is provided at the upper end of the housing, a protective ring for protecting the connecting end and the housing is provided in the protective groove, the upper end of the protective ring protrudes from the upper end of the housing, a safety gap is provided between the upper end of the protective ring and the lower end of the connecting end, a pressure cap is detachably provided at the lower end of the housing, a connecting lug is fixedly provided at the lower end of the pressure cap, and a connecting rod is detachably provided on the connecting lug.

[0005] As a preferred technical solution, an outer spacer is provided between the first bearing and the second bearing, the outer spacer abuts against the inner side of the housing, and the outer spacer is coaxially arranged with the mandrel.

[0006] As a preferred technical solution, the mandrel sleeve is provided with an inner spacer, which is located between the first bearing and the second bearing.

[0007] As a preferred technical solution, a sealing ring is embedded on the inner side of the housing, and the sealing ring is sleeved on the mandrel.

[0008] As a preferred technical solution, a fixing cover is detachably provided on one side of the connecting part, a first slot is provided on the inner side of the fixing cover, a second slot is provided on the side of the connecting part facing the fixing cover, and a retaining ring is sleeved on the pull rod, which is engaged in the first slot and the second slot.

[0009] As a preferred technical solution, the retaining ring has a two-half structure.

[0010] As a preferred technical solution, the housing is provided with an oil nozzle inserted radially, and the outer spacer is provided with a through hole that passes through it radially.

[0011] As a preferred technical solution, the protective ring is made of a non-metallic material.

[0012] The beneficial effects of this utility model are:

[0013] 1) A safety clearance is set at the upper end of the protective ring and the lower end of the connecting part. If the bearing is damaged, the protective ring will contact the connecting part, so that the connecting part will not contact the housing and generate friction. This solves the technical problem of high temperature friction between the connecting part of the spindle and the housing, and improves production safety.

[0014] 2) The inner and outer spacers separate the first and second bearings and provide limiting functions;

[0015] 3) The two-piece design of the retaining ring facilitates installation and removal;

[0016] 4) Grease for the first and second bearings can be added periodically via grease fittings to prevent bearing damage from grease loss and extend their service life. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a rotary joint provided in one embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of a rotary joint provided in one embodiment of the present invention;

[0019] exist Figures 1-2 In the middle, 1. mandrel; 101. connecting part; 2. fixing cover; 3. retaining ring; 4. housing; 5. sealing ring; 6. protective ring; 7. first bearing; 8. outer spacer; 9. inner spacer; 10. second bearing; 11. through hole; 12. pressure cap; 13. connecting lug; 14. oil nozzle; 15. pull rod; 16. connecting rod; 17. safety clearance. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "head," "tail," "top," "bottom," "left," "right," "front," "rear," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] Please see Figures 1-2 This utility model provides a centrifuge rotary joint, including a housing 4. A mandrel 1 is rotatably inserted into the housing 4. A first bearing 7 and a second bearing 10 are sequentially mounted on the mandrel 1 from top to bottom. A connecting part 101 is provided at the upper end of the mandrel 1. A pull rod 15 is detachably mounted on the connecting part 101. The connecting part 101 is located above the housing 4. An annular protective groove (not shown) is provided at the upper end of the housing 4. A protective ring 6 for protecting the connecting end and the housing 4 is provided within the protective groove. The upper end of the protective ring 6 protrudes from the upper end of the housing 4. A safety gap 17 is provided between the upper end of the protective ring 6 and the lower end of the connecting end. A pressure cap 12 is detachably mounted at the lower end of the housing 4. A connecting ear 13 is fixedly installed at the lower end of 12. A connecting rod 16 is detachably installed on the connecting ear 13. When the bag is pulled, the spindle 1 and the pull rod 15 rotate at low speed. The piston rod of the cylinder drives the connecting rod 16, so that the housing 4, the spindle 1 and the pull rod 15 move downward together. After the bag is pulled, the cylinder resets. When the separation is performed, the spindle 1 and the pull rod 15 rotate at high speed. At this time, the housing 4 and the connecting rod 16 are stationary. A safety gap 17 is provided between the upper end of the protective ring 6 and the lower end of the connecting part 101. If the bearing is damaged, the protective ring 6 will contact the connecting part 101. In this way, the connecting part 101 will not contact the housing 4 and generate friction. This solves the technical problem of high temperature friction between the connecting part 101 of the spindle 1 and the housing 4, and improves production safety.

[0023] like Figures 1-2 As shown, an outer spacer 8 is provided between the first bearing 7 and the second bearing 10. The outer spacer 8 abuts against the inner side of the housing 4. The outer spacer 8 is coaxially arranged with the mandrel 1. The mandrel 1 is fitted with an inner spacer 9. The inner spacer 9 is located between the first bearing 7 and the second bearing 10. The inner spacer 9 and the outer spacer 8 separate the first bearing 7 and the second bearing 10 and limit their movement.

[0024] like Figures 1-2As shown, a sealing ring 5 is embedded inside the housing 4. The sealing ring 5 is sleeved on the spindle 1 to prevent material from entering the housing 4 and damaging the bearing, thereby extending its service life.

[0025] like Figures 1-2 As shown, a fixing cover 2 is detachably provided on one side of the connecting part 101. A first slot is provided on the inner side of the fixing cover 2, and a second slot is provided on the side of the connecting part facing the fixing cover 2. A retaining ring 3 is sleeved on the pull rod 15, and the retaining ring 3 is engaged in the first and second slots for easy disassembly and installation.

[0026] like Figures 1-2 As shown, the retaining ring 3 has a two-half structure, which facilitates installation. The installation space of the rotary joint is limited. During assembly, one half of the retaining ring 36 is first placed into the second groove on the connector, and then the other half of the retaining ring 3 is put onto the pull rod 15. Then, the fixing cover 2 is installed, the first groove is aligned with the retaining ring 3, and the bolts are tightened to connect the fixing cover 2 to the connecting part 101. The fixing cover 2 clamps the pull rod 15, which is convenient for installation and disassembly and improves work efficiency.

[0027] like Figures 1-2 As shown, the housing 4 is provided with an oil nozzle 14 inserted radially, and the outer spacer 8 is provided with a through hole 11 that passes through it radially. Grease for the first bearing 7 and the second bearing 10 can be added periodically through the oil nozzle 14 to avoid bearing damage caused by loss of grease and to extend service life.

[0028] like Figures 1-2 As shown, the protective ring 6 is made of non-metallic material, such as rubber or plastic. The protective ring 6 will not generate high temperature due to friction with the connecting part 101, and it plays a buffering role when the connecting part 101 falls, so as not to damage the surface of the connecting part 101 and the shell 4.

[0029] The above embodiments are merely descriptions for clearly illustrating the present utility model, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all implementations here, and the obvious variations or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A centrifuge rotary joint comprising a housing, characterized by, The shell is rotatably inserted with a mandrel, the mandrel is sequentially sleeved with a first bearing and a second bearing from top to bottom, the upper end of the mandrel is provided with a connecting part, the connecting part is detachably provided with a pull rod, the connecting part is located above the shell, the upper end of the shell is provided with an annular protection groove, the protection groove is provided with a protection ring for protecting the connecting end and the shell, the upper end of the protection ring protrudes from the upper end of the shell, the upper end of the protection ring is provided with a safety gap with the lower end of the connecting end, the lower end of the shell is detachably provided with a gland, the lower end of the gland is fixedly provided with a connecting lug, and the connecting lug is detachably provided with a connecting rod.

2. A centrifuge rotary union according to claim 1, wherein, An outer spacer is arranged between the first bearing and the second bearing, the outer spacer abuts the inner side of the shell, and the outer spacer is coaxially arranged with the mandrel.

3. A centrifuge rotary union according to claim 2, wherein, The mandrel is sleeved with an inner spacer, and the inner spacer is located between the first bearing and the second bearing.

4. A centrifuge rotary union according to claim 1, wherein, A sealing ring is embedded in the inner side of the shell, and the sealing ring is sleeved on the mandrel.

5. A centrifuge rotary union according to claim 1, wherein, A fixed cover is detachably arranged on one side of the connecting part, the inner side of the fixed cover is provided with a first clamping groove, one side of the connecting part facing the fixed cover is provided with a second clamping groove, the pull rod is sleeved with a clamping ring, and the clamping ring is clamped in the first clamping groove and the second clamping groove.

6. A centrifuge rotary union according to claim 5, wherein, The clamping ring is a two-piece structure.

7. A centrifuge rotary union according to claim 2, wherein, The shell is radially inserted with an oil nozzle, and the outer spacer is provided with a through hole penetrating the radial direction.

8. A centrifuge rotary union according to claim 1, wherein, The material of the protection ring is a non-metal material.

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