CN203586921U

CN203586921U - Ferrule-type seal connector

Info

Publication number: CN203586921U
Application number: CN201320714338.4U
Authority: CN
Inventors: 曹树邦; 曹建熙
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-14
Filing date: 2013-11-14
Publication date: 2014-05-07
Anticipated expiration: 2023-11-14

Abstract

The utility model provides a ferrule-type seal connector comprising an inner connector, a ferrule, and an outer connector. One end of the inner connector is connected with one end of the outer connector; the outer periphery of the other end of the inner connector is provided with a screw thread; the inner connector and the outer connector are connected to form a cavity; the ferrule is disposed in the cavity; a hole in one end, connected with the ferrule, of the inner connector is under a first conic degree; a hole in one end, connected with the ferrule, of the outer connector is under a second conic degree; the outer periphery of one end of the ferrule is under a third conic degree matching with the first conic degree of the inner connector; the outer periphery of the other end of the ferrule is under a fourth conic degree matching with the second conic degree of the outer connector; an inner hole in one end, connected with the inner connector, of the ferrule is provided with an arc groove whereby the ferrule elastically deforms as required. The ferrule-type seal connector has the advantages that the structural design is reasonable, sealing performance is reliable, operating state is stable, failure rate is low and production efficiency is greatly improved.

Description

Locking casing type sealing joint

Technical field

The utility model belongs to static seal device, and particularly a kind of small heat-exchanger spiral coil stretches out the locking casing type sealing joint that end caps is connected with end cap.

Background technology

It is between nipple and coupling, to place an O type circle that existing small heat-exchanger spiral coil stretches out the most general way that sealing that end caps is connected with end cap used, this O type snare is on the spiral coil cylindrical stretching out, this way is fairly simple, but there is following shortcoming: spiral coil is cold-drawn material, in addition the outside diameter tolerance of the drawn tube of different batches or different manufacturers wants coarse a lot of compared with machining, only depends on the sealing of O type circle very unreliable; During the sealing leak of O type circle, remedial measure is to screw coupling, and compression O type circle makes its distortion reach sealing.The distortion of O type circle increases, and accelerates O type circle degree of aging and loses bullet degree, finally can only change O type circle; No matter screwing coupling or changing O type circle is all in the equipment measure of taking in service, as apparatus stop production to overhaul, on producing, has impact, especially on the flow production line of petrochemical industry, operation continuously, affects even more serious.

Summary of the invention

The utility model provides a kind of reasonable in design for solving the technical problem existing in known technology, and sealing property is reliable, the locking casing type sealing joint of long service life.

The technical scheme that the utility model is taked for the technical problem existing in solution known technology is:

A kind of locking casing type sealing joint, comprise nipple, cutting ferrule, coupling, it is characterized in that: one end of described nipple is connected with one end of coupling, other end cylindrical is threaded, nipple is connected with coupling and forms a cavity, in it, be placed with cutting ferrule, in the hole of the one end being connected with cutting ferrule at nipple, be provided with the first tapering, in the hole of one end that coupling is connected with cutting ferrule, be provided with the second tapering, the cylindrical place, one end of cutting ferrule is provided with the 3rd tapering matching with nipple the first tapering, its other end cylindrical place is provided with the 4th tapering matching with coupling the second tapering, in the endoporus of one end that cutting ferrule is connected with nipple, be provided with an arc groove, can make cutting ferrule produce the strain needing.

Described cutting ferrule adopts thin-wall construction, and the cutting ferrule wall near nipple tip is thinner, thicker near the cutting ferrule wall of external head end.

Tapering and the inside and outside joint at described cutting ferrule two ends match, and the nominal tapering of the contact position of coupling and cutting ferrule is 80 °, and the nominal tapering of nipple and cutting ferrule contact position is interior 30 °.For the tapering and the inside and outside joint that guarantee cutting ferrule two ends are in contact with one another good seal, contact condition should be circumference contact, the machining deviation of cutting ferrule two ends tapering is taken as to minus deviation for this reason, the machining deviation of interior coupling tapering is taken as to overgauge, has guaranteed that the rear cutting ferrule of interior coupling locking is circumference with the contact condition of spiral coil and contacts with interior coupling, cutting ferrule.

The utility model compared with prior art has significant advantage and beneficial effect: 1, locking casing type sealing joint is compared with employing O type circle seal nipple, and sealing reliability can be good, long service life, easy access renewal part.2, O type circle seal nipple and locking casing type sealing joint are all to contact with the cold-drawn material of spiral coil to realize sealing, and the locked gap maximum of the cutting ferrule of locking casing type sealing joint and spiral coil can reach 0.4 ㎜, can guarantee completely locked.The control gap of actual design is 0.2 ㎜, and this size is enough to meet the maximum deviation of cold-drawn material, so use locking casing type sealing joint sealing effectiveness reliable.For O type circle seal nipple, the gap of 0.2 ㎜ cannot guarantee sealing effectiveness at all.3, for O type circle seal nipple, remedying the way that excesssive gap prevents that O type circle from leaking can only be to screw coupling, and compression O type circle makes its distortion, tightly embrace spiral coil, to no longer leaking, the consequence of doing is like this more to have accelerated the aging of O type circle and lost bullet degree, forms vicious circle.Locking casing type sealing joint is to utilize the strain of cutting ferrule to reach sealing effectiveness, fundamentally solves these problems.The O type circle of O type circle seal nipple needed to change O type circle after losing efficacy, and needed to shut down, and tore trade-in open, and locking casing type sealing joint does not exist this problem.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model;

Fig. 2 is the cross-sectional view of Fig. 1;

Fig. 3 is decomposing schematic representation of the present utility model;

Fig. 4 is that the utility model and heat exchanger are connected and installed schematic diagram.

Wherein: 1, coupling; 2, cutting ferrule; 3, nipple; 4, the first tapering; 5, the second tapering; 6, the 4th tapering; 7, the 3rd tapering; 8, arc groove; 9, heat exchanger end cap; 10, spiral coil.

The specific embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to the specific embodiment providing according to the utility model, structure, feature and effect thereof, be described in detail as follows.

As shown in Fig. 1-4, a kind of locking casing type sealing joint, comprise nipple 3, cutting ferrule 2, coupling 1, one end of described nipple 3 is connected with one end of coupling, other end cylindrical is threaded, nipple is connected with coupling and forms a cavity, in it, be placed with cutting ferrule 2, in the hole of the one end being connected with cutting ferrule at nipple, be provided with the first tapering 4, in the hole of one end that coupling is connected with cutting ferrule, be provided with the second tapering 5, cylindrical place, cutting ferrule one end is provided with the 3rd tapering 7 matching with nipple the first tapering 4, its other end is provided with the 4th tapering 6 matching with coupling the second tapering 5, cutting ferrule is connected with nipple in the endoporus of one end and is provided with arc groove 8, can make cutting ferrule produce the strain needing.Described cutting ferrule adopts thin-wall construction, and the cutting ferrule wall near nipple tip is thinner, thicker near the cutting ferrule wall of external head end.Tapering and the inside and outside joint at described cutting ferrule 2 two ends match, and the nominal tapering of the contact position of coupling and cutting ferrule is 80 °, and the nominal tapering of nipple and cutting ferrule contact position is 30 °.

Operation principle of the present utility model: during use, first nipple 3 screwed one end of straight hole end are screwed on the end cap that heat exchanger 9 spiral coils stretch out, before being screwed into, and the turret head end face that is integrated of nipple and end cap between a combination mat is housed, after tightening and the static seal of end cap be reliable.Next be the sealing problem with spiral coil, it should be noted that spiral coil 10 extension elongations must be just at cutting ferrule 2 endoporus (while being 12mm as spiral coil diameter, cutting ferrule diameter of bore is 12.2mm) axial centre position or left slightly cross, in, cutting ferrule is placed at coupling middle cavity place, the tapering at cylindrical place, described cutting ferrule two ends respectively with nipple hole in tapering and the tapering in coupling hole match, greatly 80 ° of the nominal taperings of the contact position of coupling and cutting ferrule, during clamping, be out of shape small, the nominal tapering little of nipple and cutting ferrule contact position is 30 °, during clamping, more easily produce needed distortion, when tightening coupling, compress cutting ferrule and produce strain, locked spiral coil, can reach best sealing effectiveness, there is no leakage phenomenon.Due to cutting ferrule adopt be thin-wall construction, while tightening, do not need very large moment of torsion, can produce again need strain, locked spiral coil reaches sealing function.

Claims

1. a locking casing type sealing joint, comprise nipple, cutting ferrule, coupling, it is characterized in that: one end of described nipple (3) is connected with one end of coupling (1), other end cylindrical is threaded, nipple is connected with coupling and forms a cavity, in it, be placed with cutting ferrule (2), in the hole of the one end being connected with cutting ferrule at nipple, be provided with the first tapering (4), in the hole of one end that coupling is connected with cutting ferrule, be provided with the second tapering (5), the cylindrical place, one end of cutting ferrule is provided with the 3rd tapering (7) matching with nipple the first tapering (4), its other end cylindrical place is provided with the 4th tapering (6) matching with coupling the second tapering (5), in the endoporus of one end that cutting ferrule is connected with nipple, be provided with an arc groove (8).

2. locking casing type sealing joint according to claim 1, is characterized in that: what described cutting ferrule (2) adopted is thin-wall construction.

3. locking casing type sealing joint according to claim 1, it is characterized in that: tapering and the inside and outside joint at described cutting ferrule (2) two ends match, the nominal tapering of the contact position of coupling and cutting ferrule is 80 °, and the nominal tapering of nipple and cutting ferrule contact position is 30 °.