CN2739455Y

CN2739455Y - Built-in compensating structure for rotary joint

Info

Publication number: CN2739455Y
Application number: CN 200420080357
Authority: CN
Inventors: 李继锁; 沈元坤
Original assignee: TENGXUAN ROTARY JOINT FACTORY WUXI CITY
Current assignee: TENGXUAN ROTARY JOINT FACTORY WUXI CITY
Priority date: 2004-10-16
Filing date: 2004-10-16
Publication date: 2005-11-09
Anticipated expiration: 2014-10-16

Abstract

The utility model relates to a built-in compensating structure for rotary joint, which is intended for connection to a drying cylinder joint on a paper machine and belongs to the technical field of sealing devices. Built-in axial direction adjustment compensating structure is arranged between a concentric support and a casing. A sealing ring with spherical surface is arranged between the built-in axial direction adjustment compensating structure and a spherical surface end cover. A tail hood is arranged on the side face of the casing, and lens devices are arranged on both sides of the tail hood. With simple and reasonable structure as well as convenient installation, the utility model automatically regulates the drying cylinder axle neck to protect the axle neck from expanding and shrinking, and prevent the axle neck from great change of axial direction connection size caused by the damage. Therefore, the utility model can be effectively sealed even in wider range of temperature. The entire installation accuracy is high, and the assembly concentric degree of built-in axial direction adjustment compensating structure is good. The stress of a built-in spring is stable and is not affected by external environment with corrosive gas, and the built-in spring has long service life.

Description

The built-in collocation structure of swivel joint

Technical field

The utility model relates to a kind of built-in collocation structure of swivel joint, is used for being connected with drying cylinder joint on the paper machine, belongs to the seal arrangement technical field.

Background technique

In paper industry, have the drying cylinder of hot-swap feature on the general paper machine, heating must carry the swivel joint of heat exchange medium (as steam) to realize by one.Heat exchange medium is connected with static pipeline by an end, and the other end is to be connected with the drying cylinder spindle nose of rotation, and the centre guarantees to carry by swivel joint.At present, sealing configuration normally adopts the combination of ball face sealing and plane sealing to realize in swivel joint.The wearing and tearing collocation structure that expands with heat and contract with cold mostly adopts the combination of spring and guide pin bushing, and all is external.Heat exchange medium (as steam) flows into drying cylinder by swivel joint, and after drying cylinder discharged heat energy, steam was condensed into water at inwall, and condensed water is discharged by same joint (one-way fashion is another joint), and drying cylinder generally will operate in the temperature province of broad.When beginning, center housing temperature is low, and compressed steam flows into drying cylinder by swivel joint, and temperature raises rapidly.In addition, because the fluctuating of operating temperature, drying cylinder and axle journal thereof are because of variation of temperature, its axial dimension can change to some extent, add the continuous wearing and tearing of sealing surface and also can cause the change of axial dimension, and swivel joint is installed in an end of drying cylinder axle journal, utilizes axial pressure to seal, axial Conncetion cimension changes, and can bring harmful effect to the sealing effect of swivel joint.The swivel joint of said structure can not play seal action under the situation of temperature variation thus, and also difficulty is installed, and working life is short.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple in structure, rationally; Can regulate avoid expanding with heat and contract with cold and the wear and tear variation of the bigger axial Conncetion cimension that causes of drying cylinder axle journal automatically, make the built-in collocation structure of the swivel joint of its sealing of in the temperature province of broad, still remaining valid.

Main solution of the present utility model is achieved in that

The utility model mainly adopts and with cardiac skeleton 1 and 16 of housings built-in axial adjustment collocation structure is being housed, spherical seal ring 7 is contained between built-in axial adjustment collocation structure and the sphere end cap 5, in housing 16 sides tail-hood 18 is housed, mirror device is housed in tail-hood 18 2 sides.

Compared with the prior art the utility model has the following advantages:

The utility model is simple in structure, and is rationally, easy for installation; Can regulate avoid expanding with heat and contract with cold and the wear and tear variation of the bigger axial Conncetion cimension that causes of drying cylinder axle journal automatically, make its sealing of in the temperature province of broad, still remaining valid; Integral installation precision height, built-in axial dimension collocation structure assembling good concentricity; Built-in spring stress is steadily balanced, is not subjected to the external world that the influence of etchant gas environment, long service life are arranged.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model rear-view mirror figure.

Embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

The utility model mainly adopts spring washer 12, nut 13, bolt 14 that housing 16 is fastened on end face with cardiac skeleton 1.With cardiac skeleton 1 and 16 of housings built-in axial adjustment collocation structure is being housed, sphere end cap 5 and spherical seal ring 7 are contained in built-in axial adjustment collocation structure middle external tube 11 and with between the cardiac skeleton 1, nut 2, screw 3 are fastened on on the cardiac skeleton 1, and sphere end cap 5 and sealing gasket 4 adopt screw 6 to be fastenedly connected with drying cylinder axle journal end face.Built-in axial adjustment collocation structure is made up of outer tube 11, end cap 8, spring 10, screw 9, o shape circle 15 etc.Outer tube 11 is contained in the housing 16 and can endwisely slips, and spring 10, O shape circle 15 are housed on outer tube 11, and end cap 8 is sleeved on the outer tube 11, adopts screw 9 fastening, and straight pin 21 is housed thereon.In housing 16 sides tail-hood 18 is housed, and sealing gasket 17 is housed between them, adopt screw 19 fastening.On housing 16 and tail-hood 18, pressure tap chock plug 20 is housed.Mirror device comprises visor screw 26, sheet mica 22, visor 23, visor end cap 24, visor sealing gasket 25, adopts fastening visor screw 26 that sheet mica 22, visor 23, visor end cap 24, visor sealing gasket 25 are fastened on tail-hood 18 both sides.

The utility model working principle and working procedure:

After connecting with cardiac skeleton 1, adopt screw 6 to be fastenedly connected by sphere end cap 5 and sealing gasket 4 with drying cylinder axle journal end face, and adopt spherical seal ring 7 to be contained between sphere end cap 5 and the slip outer tube, bear axial pressure, formed sealing configuration.Because the universal structure of sphere still keeps sealing function so can bear the eccentric force of drying cylinder axle journal.And the variation of the bigger axial dimension that the wearing and tearing of sealing surface and expanding with heat and contract with cold cause just has built-in nose balance structure to regulate.Regulate by one group of spring in the end cap 8, make slip outer tube 11 in axially energy displacement, to regulate the variation of axial dimension.When endwisely slipping, slip outer tube 11 does radial seal with O shape circle 15 in housing 16.Sphere end cap 5, spherical seal ring 7, slip outer tube 11 and housing 16 endoporus axially communicate.Be shaped on the inner conical surface of pipe in the location in housing 16, housing 16 flange in the bottom are connected with admission line, and tail-hood 18 flange in the bottom link to each other with the condensation-water drain pipeline.

Claims

1, a kind of built-in collocation structure of swivel joint, mainly comprise same cardiac skeleton (1), housing (16), tail-hood (18), it is characterized in that between same cardiac skeleton (1) and housing (16), built-in axial adjustment collocation structure being housed, spherical seal ring (7) is contained between built-in axial adjustment collocation structure and the sphere end cap (5), in housing (16) side tail-hood (18) is housed, mirror device is housed in tail-hood (18) two sides.

2, the built-in collocation structure of swivel joint according to claim 1, it is characterized in that described built-in axial adjustment collocation structure encloses (15) by outer tube (11), end cap (8), spring (10), screw (9), o shape and forms, spring (10), O shape circle (15) are housed on outer tube (11), and end cap (8) is sleeved on the outer tube (11).

3, the built-in collocation structure of swivel joint according to claim 1 is characterized in that described mirror device comprises sheet mica (22), visor (23), visor end cap (24), visor sealing gasket (25), adopts visor screw (26) fastening.