CN210510643U

CN210510643U - Ultralow temperature rotary joint

Info

Publication number: CN210510643U
Application number: CN201921277335.2U
Authority: CN
Inventors: 张峰; 王文文
Original assignee: Suzhou Hanlong Petroleum Equipment Co ltd
Current assignee: Suzhou Hanlong Petroleum Equipment Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-12
Anticipated expiration: 2029-08-08

Abstract

The application discloses ultra-low temperature rotary joint relates to the rotary joint field, includes: a static flange; one side of the static flange is movably connected with the outer ring; one side of the static flange is also movably connected with the inner ring, a cavity is arranged between the inner ring and the outer ring, and the cavity is communicated with the static flange and the outer ring, the static flange and the inner ring, and the inner ring and the outer ring; the movable flange is arranged on one side of the outer ring and one side of the inner ring, a dustproof and waterproof seal is arranged between the static flange and the outer ring, and the dustproof and waterproof seal is suitable for sealing a cavity gap between the static flange and the outer ring; dustproof and waterproof seals leak hunting device, dustproof and waterproof seals leak hunting device sets up in the through-hole of outer lane, this through-hole intercommunication the cavity detects the interior vapor content of rotary joint through dustproof and waterproof seals leak hunting device, can know fast whether dustproof and waterproof seals are effective, convenient, effective.

Description

Ultralow temperature rotary joint

Technical Field

The application relates to the field of rotary joints, in particular to an ultralow-temperature rotary joint.

Background

The ultra-low temperature loading and unloading crane pipe arm and the ultra-low temperature ship loading and unloading arm are domestic industrial products developed in recent years, are mainly used for loading and unloading ultra-low temperature fluid in chemical industry and petrochemical industry, and the technical core component of the ultra-low temperature loading and unloading crane pipe arm and the ultra-low temperature ship loading and unloading arm is a rotary joint. The rotary joint in the prior art has the following defects that the inner ring and the outer ring are independent entities, and can generate different deformations due to different temperature transmission under the ultralow temperature condition, so that the inner part is abraded, and the inner structure and the sealing are further damaged. In the prior art, the dustproof and waterproof seal is also called as a nitrogen seal and is designed as an end surface flooding plug seal, and a metal seal surface is arranged in a radial direction, so that the metal seal surface is easy to wear in the production process and during installation and maintenance; and once the dustproof and waterproof seal leaks and fails due to the reasons of abrasion and the like, other sealing parts fail due to continuous accumulation of water vapor in the rotary joint, so that the whole rotary joint fails.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is in case leak failure because of reasons such as wearing and tearing among the prior art dustproof and waterproof seal, rotary joint inside can constantly accumulate steam and can other seal part inefficacy, and then make the problem that whole rotary joint became invalid.

In order to achieve the purpose, the following technical scheme is adopted in the application: an ultra-low temperature rotary joint comprising: a static flange; one side of the static flange is movably connected with the outer ring; one side of the static flange is also movably connected with the inner ring, a cavity is arranged between the inner ring and the outer ring, and the cavity is communicated with the static flange and the outer ring, the static flange and the inner ring, and the inner ring and the outer ring; the movable flange is arranged on one side of the outer ring and one side of the inner ring, and a dustproof and waterproof seal is arranged between the static flange and the outer ring and is suitable for sealing a cavity gap between the static flange and the outer ring; the dustproof and waterproof sealing leakage detection device is arranged in a through hole of the outer ring, the through hole is communicated with the cavity, and the dustproof and waterproof sealing leakage detection device is suitable for detecting the water vapor content in the rotary joint;

through setting up the sealed of dustproof and waterproof sealing assurance cavity, set up through dustproof and waterproof sealing leak hunting device, it can have the inside steam content of effective detection ultra-low temperature rotary joint, and let the staff can effectively learn ultra-low temperature rotary joint's leakproofness through the feedback, thereby judge whether dustproof and waterproof sealing is in normal operating condition, the problem that dustproof and waterproof sealing's operating condition among the prior art is difficult to detect has been solved, and prevent the condition of great loss, improve ultra-low temperature rotary power joint's life-span.

Further, according to an embodiment of the present application, wherein, the through-hole swing joint of outer lane have the plug screw, the position swing joint that the surface of plug screw is close to the upper end has the plug screw gasket, the plug screw, dustproof and waterproof seals leak hunting device pass through the plug screw with the plug screw gasket is sealed to be fixed on the outer lane.

Further, according to an embodiment of the present application, wherein the inside of the static flange is movably connected with a static sealing ring, and a static flange tetrafluoro gasket is movably connected between the static flange and the outer ring.

Further, according to an embodiment of the present application, a rolling groove is disposed in the cavity, and a steel ball is movably linked inside the rolling groove.

Further, according to an embodiment of the present application, wherein the dustproof and waterproof seal includes an abutting surface, a slot is opened in the middle of the abutting surface, and the abutting surface abuts between the outer ring and the inner ring.

Further, according to an embodiment of this application, wherein, the outer lane with swing joint has movable flange tetrafluoro pad between the movable flange, the position that the upper end surface of movable flange is close to the outer lane is provided with time dynamic seal, and moves the inside of flange and be provided with initiative sealedly.

Further, according to an embodiment of the present application, an inner ring bearing is movably connected inside the outer ring, and an outer surface of one side of the inner ring bearing, which is far away from the static flange, is movably connected with the movable flange.

Further, according to an embodiment of the present application, a first bolt penetrates through between the inner portion of the static flange and the inner ring, and the first bolt connects the static flange and the inner ring together.

Further, according to an embodiment of the present application, a second bolt penetrates through between the inner portion of the movable flange and the outer ring, and the second bolt connects the movable flange and the outer ring together.

Further in accordance with an embodiment of the present application, wherein the apparatus for detecting leakage of dust-and water-tight seal comprises: the casing, casing outer end seal is fixed with lens, casing inner end is fixed with the filter screen film, the inside packing of casing has dry color-changing agent, dry color-changing agent passes through the contact of filter screen film the inner circle with cavity between the outer lane.

The sealing of the cavity is ensured by arranging the dustproof and waterproof seal, and the dustproof and waterproof seal leak detection device is arranged, so that the water vapor content in the ultralow-temperature rotary joint can be effectively detected, and a worker can effectively know the sealing performance of the ultralow-temperature rotary joint by feeding back a dry color-changing agent through a lens, thereby judging whether the dustproof and waterproof seal is in a normal working state or not, solving the problem that the working state of the dustproof and waterproof seal in the prior art is difficult to detect, preventing the occurrence of a large loss condition and prolonging the service life of the ultralow-temperature rotary power joint; by adopting the design of separating the inner ring bearing from the inner ring, the inner ring bearing and the outer ring can be ensured to be made of the same high-strength material, and the inner ring bearing and the outer ring have the same low-temperature deformation under the ultra-low temperature condition, so that the precision of the rolling groove is ensured, and the problem of low service life caused by abrasion of the rolling groove due to different deformations of the inner ring and the outer ring at low temperature of other products in the market is avoided; through setting up dustproof and waterproof sealing, inferior dynamic seal, the sealed cavity of initiative seal, through quiet sealing washer sealed static flange and inner circle joint gap, through sealed inner circle of initiative and dynamic flange joint gap, make whole device's waterproof and dustproof effect improve, reinforcing ultra-low temperature rotary joint life.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a schematic view of an ultra-low temperature rotary joint structure according to an embodiment of the present application.

Fig. 2 is a diagram of the dustproof and waterproof sealing leak detection device.

In the attached drawings

1. Static flange 2, static sealing ring 3, static flange tetrafluoro pad

4. Dustproof and waterproof seal 5, inner ring 6 and outer ring

7. Inner ring bearing 8, plug screw 9, plug screw gasket

10. Steel ball 11, movable flange tetrafluoro gasket 12 and secondary dynamic seal

13. Active seal 14, movable flange 151 and bolt I

152. Second bolt 16, dustproof and waterproof sealing leakage detection device 17 and shell

18. Dry color-changing agent 19, lens 20, and filter film

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

As shown in fig. 1, the application discloses ultra-low temperature rotary joint, including static flange 1, a side surface swing joint outer lane 6 of static flange 1, the inside swing joint of outer lane 6 has plug screw 8, the position that the surface of plug screw 8 is close to the upper end is connected with plug screw gasket 9, the position that is close to the edge between static flange 1 and the outer lane 6 sets up dustproof and waterproof seal 4, dustproof and waterproof seal 4 is sealed the sealed pad of polytetrafluoroethylene promptly for the PTFE is sealed, dustproof and waterproof seal 4 is including the metal seal face, the metal seal face is axial setting, and the meaning that the axial set up is: the metal sealing surface is set to be parallel or coincident with the inner ring 5 and the side face of the outer ring 6, one side, close to the dustproof and waterproof seal 4, of the outer ring 6 is set to be a step surface, the shape of the step surface is set corresponding to the axial arrangement of the dustproof and waterproof seal 4, the dustproof and waterproof seal 4 further comprises an extending part, the extending part is attached to a gap between the static flange 1 and the step surface of the outer ring 6, the dustproof and waterproof seal 4 further comprises a butting surface, a notch is formed in the middle of the butting surface, the butting surface is butted between the outer ring (6) and the inner ring (5), the butting surface is an elastic surface, and when the outer ring (6) is installed, the butting surface is butted against the outer ring (6) and the inner ring (5) and is compressed towards the notch, so that the gap between the step surfaces is sealed, and better sealing is realized; an inner ring 5 is movably connected to a position, close to the inside, of one side of the static flange 1, a static sealing ring 2 is movably connected to the inside of the static flange 1, a static flange polytetrafluoroethylene gasket 3 is movably connected between the static flange 1 and the outer ring 6, a rolling groove is formed between the inner ring 5 and the outer ring 6, an inner ring bearing 7 is connected to the inside of the rolling groove, a steel ball 10 is movably connected between the inner ring bearing 7 and the outer ring 6, the steel ball 10 is installed from an installation hole of a screw plug 8, a movable flange polytetrafluoroethylene gasket 11 is movably connected between the outer ring 6 and a movable flange 14, a secondary movable seal 12 is arranged on the outer surface of the upper end of the movable flange 14, close to the outer ring 6, and a driving seal 13 is; a threaded through hole is formed between the outer ring 6 and the rolling groove, the dustproof and waterproof leakage detecting hole is communicated with the outer ring 6 and the outer side of the outer ring is provided with a dustproof and waterproof leakage detecting device 16, the dustproof and waterproof leakage detecting device 16 is connected with the outer ring 6 and the rolling groove, the dustproof and waterproof sealing leakage detecting device 16 is fixed on the threaded through hole formed between 2 rolling grooves of the outer ring 6 through a screw plug 8 and a

screw plug gasket

9, 3 dustproof and waterproof leakage detecting devices 16 are specifically arranged, the number of the through holes can be set according to requirements, and the corresponding number of the dustproof and waterproof leakage detecting devices 16 are arranged; the through-hole outside sets up corresponding counter bore, the counter bore is applicable to fixedly plug screw 8 and plug screw gasket 9, plug screw 8 with plug screw gasket 9 sets up in the counter bore, changes the size cooperation of counter bore plug gasket 9 sets up, and sealed dustproof waterproof leak hunting device 16 that can be better can prevent that plug screw 8 and plug screw gasket 9 from becoming invalid because of external collision.

The first part of the ultralow temperature rotary joint is that a static flange 1 and an inner ring 5 are connected into a whole by a first bolt 151, a static sealing ring 2 and a static flange PTFE gasket 3 are arranged between the static flange 1 and the inner ring 5 to play a static seal, an inner ring bearing 7 is arranged on the outer surface of the inner ring 5, the second part is that a movable flange 14 and an outer ring 6 are connected into a whole by a second bolt 152, a movable flange PTFE gasket 11 is arranged between the movable flange 14 and the

outer ring

6, 2 rolling grooves on the inner ring bearing 7 and 2 rolling grooves on the outer ring 6 form 2 rolling ways of steel balls 10, a dustproof and waterproof seal 4 and a steel ball 10 are arranged between the second part structure and the first part structure, the secondary dynamic seal 12 and the active seal 13 are sealed by a screw plug 8 and a screw plug gasket 9 which block the installation port of the steel ball 10 on the outer ring 6, and the lubrication is to fill ultralow temperature lubricating grease in the two rolling grooves, so that the lubricating effect under the condition of extremely low temperature is ensured, and the long service life of the rotary joint is ensured; the outer end of the inner ring 5, the inner end of the outer ring 6 and the flange surface of the static flange 1 are formed to be hollow, the dustproof and waterproof seal 4 is arranged in the cavity, the metal surfaces of the dustproof and waterproof seal 4 are axially arranged and are arranged on the side surfaces of the inner ring 5 and the outer ring 6, and the abrasion of the sealing surfaces of the inner ring 5 and the outer ring 6 and the abrasion of the dustproof and waterproof seal 4 caused by production, assembly and maintenance needs, placement and the like are completely avoided.

As shown in fig. 2, the dust-proof and water-proof leakage detecting device 16 includes: the sealed lens 19 that is fixed with in the middle casing 17 outer end of drawing empty, inside end are fixed with filter screen film 20, and the inside of the middle casing 17 of drawing empty is filled dry color-changing agent 18, dry color-changing agent 18 contacts with the low temperature rotary joint slot rolling through filter screen film 20, detaches the steam in the slot rolling, and in getting into the rotary joint raceway cavity because of external steam when dustproof and waterproof seals 4 became invalid, dry color-changing agent 18 can change colour because of adsorbing too much moisture, and the colour change can be observed easily through lens 19, can remind operating personnel to need to change dustproof and waterproof seals 4. The dustproof and waterproof leakage detection device is sealed through the plug screw and the plug screw gasket and is fixed on the outer ring through thread matching, so that the dustproof and waterproof leakage detection device can be effectively prevented from contacting with the outside and falling off.

The other scheme is that rolling grooves with the number larger than two are arranged between an inner ring bearing 7 and an outer ring 6, and steel balls 10 are filled in parallel, so that a rotary joint can bear larger axial and radial torque, the dustproof and waterproof seal 4, the static seal ring 2, the secondary dynamic seal 12 and the active seal 13 are all arranged by adopting a V-shaped spring framework 16 and are wrapped by adopting a polytetrafluoroethylene material PTFE gasket 17 with self-lubrication, the long service life of the seal is ensured, the inner ring bearing 7 and the outer ring 6 can be selected from the same high-strength material by adopting the design of separating the inner ring bearing 7 from the inner ring 5, the inner ring bearing 7 and the outer ring 6 have the same low-temperature deformation under the ultralow-temperature condition, the precision of a raceway is ensured, and the problem that the service life of other products on the market is prolonged due to the abrasion of the different deformation of the inner ring and.

Although the invention has been described with respect to illustrative embodiments thereof so that those skilled in the art can understand the invention, it is to be understood that the invention is not limited to the disclosed embodiments, but rather, is intended to cover all modifications and variations within the spirit and scope of the invention as defined and defined by the appended claims.

Claims

1. An ultra-low temperature rotary joint, comprising:

a static flange (1);

one side of the static flange (1) is movably connected with the outer ring (6);

the inner ring (5) is movably connected to one side of the static flange (1), a cavity is formed between the inner ring (5) and the outer ring (6), and the cavity is communicated with the static flange (1) and the outer ring (6), the static flange (1) and the inner ring (5), and the inner ring (5) and the outer ring (6);

the movable flange (14) is arranged on one side of the outer ring (6) and one side of the inner ring (5), a dustproof and waterproof seal (4) is arranged between the static flange (1) and the outer ring (6), and the dustproof and waterproof seal (4) is suitable for sealing a cavity gap between the static flange (1) and the outer ring (6);

dustproof and waterproof seals leak hunting device (16), dustproof and waterproof seals leak hunting device (16) set up in the through-hole of outer lane (6), this through-hole intercommunication cavity, dustproof and waterproof seals leak hunting device (16) are applicable to and detect the inside steam content of rotary joint.

2. An ultra-low temperature rotary joint as claimed in claim 1, wherein the through hole of the outer ring (6) is movably connected with a plug screw (8), the position of the outer surface of the plug screw (8) close to the upper end is movably connected with a plug screw gasket (9), the plug screw (8), the dustproof and waterproof sealing and leakage detecting device (16) is hermetically fixed on the outer ring (6) through the plug screw (8) and the plug screw gasket (9).

3. An ultra-low temperature rotary joint as claimed in claim 1, wherein the static flange (1) is movably connected with a static sealing ring (2) inside, and a static flange tetrafluoro gasket (3) is movably connected between the static flange (1) and the outer ring (6).

4. An ultra-low temperature rotary joint as set forth in claim 1, wherein a rolling groove is provided in said cavity, and a steel ball (10) is movably linked inside said rolling groove.

5. An ultra-low temperature rotary joint as set forth in claim 1, wherein the dust and water proof seal (4) comprises an abutment surface with a notch in the middle, the abutment surface abutting between the outer ring (6) and the inner ring (5).

6. An ultra-low temperature rotary joint as claimed in claim 1, wherein a movable flange tetrafluoro gasket (11) is movably connected between the outer ring (6) and the movable flange (14), a secondary movable seal (12) is arranged at the position of the outer surface of the upper end of the movable flange (14) close to the outer ring (6), and a driving seal (13) is arranged inside the movable flange (14).

7. An ultra-low temperature rotary joint as claimed in claim 1, wherein the inner ring bearing (7) is movably connected to the inner part of the outer ring (6), and the outer surface of one side of the inner ring bearing (7) far from the static flange (1) is movably connected to the dynamic flange (14).

8. An ultra-low temperature rotary joint as claimed in claim 1, wherein a first bolt (151) penetrates between the inner part of the static flange (1) and the inner ring (5), and the first bolt (151) connects the static flange (1) and the inner ring (5) together.

9. An ultra-low temperature rotary joint as claimed in claim 1, wherein a second bolt (152) penetrates between the inner part of the movable flange (14) and the outer ring (6), and the second bolt (152) connects the movable flange (14) and the outer ring (6).

10. An ultra-low temperature rotary joint as set forth in claim 1, wherein said dust and water tight seal leak detection apparatus comprises: casing (17), casing (17) outer end is sealed to be fixed with lens (19), casing (17) inner end is fixed with filter screen film (20), the inside packing of casing (17) has dry discoloring agent (18), dry discoloring agent (18) pass through filter screen film (20) contact inner circle (5) with cavity between outer lane (6).