CN104993315A

CN104993315A - Corrugated pipe sealing joint with shielding function

Info

Publication number: CN104993315A
Application number: CN201510263547.5A
Authority: CN
Inventors: 刘丹; 李军伟; 曹季伟; 张燕亮; 王飞; 倪大成
Original assignee: Ningbo CSR Times Transducer Technology Co Ltd
Current assignee: Ningbo CRRC Times Transducer Technology Co Ltd
Priority date: 2015-05-22
Filing date: 2015-05-22
Publication date: 2015-10-21
Anticipated expiration: 2035-05-22
Also published as: CN104993315B

Abstract

The invention discloses s corrugated pipe sealing joint with a shielding function. The sealing joint comprises a shielding ring, a sealing ring, a compressing ring and a locking piece. The shielding ring is made of copper alloy. The inner wall at the front end of the shielding ring is welded with a shielding wire, and the outer wall is in a transition interference fit with the inner wall of a sensor housing. The rear end of the shielding ring is externally connected with the front end of a corrugated pipe in a sleeving manner, the front end of the corrugated pipe is externally connected with the compressing ring in a sleeving manner, the compressing ring is in contact with the inner wall of the sensor housing, and the locking piece is installed at the tail end of the sensor housing. The sealing joint is capable of improving the shielding effect, the interference resistance and the sealing performance.

Description

With the sylphon seal joint of function of shielding

Technical field

The present invention relates to transducer and bellows connector, particularly relate to the seal nipple with function of shielding.

Background technology

In locomotive and rail field, city, for the matched velocity transducer of traction electric machine, due to fitting operation limited space, require that it is microminiaturized.Along with existing running environment requires more and more higher, need to realize cable shielding conductor in the microminiaturized space of velocity transducer and be connected altogether with housing, to realize good EMC performance; Simultaneously for realizing cable protection, need to install corrugated flexible hose additional, and the switching of flexible pipe and Sensor tail leading-out terminal needs good fixing and locking and sealing.

Existing hose coupling is universal standard part, there are three shortcomings: be 1, coordinate with hose coupling, sensor housing dimension of inner and outer diameters is all limited, is difficult to the microminiaturization realizing transducer on transducer; 2, the corrugated flexible hose of protective cable line cannot directly fixing and locking and sealing, causes the flexible pipe at transducer leading-out terminal place cannot carry out the stressed hidden danger of cable by fixed band, and sealing property can not satisfy the demands simultaneously; 3, contact resistance when cable shielding conductor is connected with housing is bigger than normal, and then affects the common ground effect of shielding conductor and housing, causes EMC impaired performance.

Summary of the invention

Technical problem to be solved by this invention be overcome prior art above-mentioned deficiency and a kind of sylphon seal joint with function of shielding is provided, improve shield effectiveness, anti-interference and sealing property, coordinate firmly.

The present invention's adopted technical scheme that solves the problem is: the sylphon seal joint of band function of shielding, seal nipple comprises shading ring, sealing ring, hold-down ring and locking member, shading ring is made up of copper alloy, the front inner wall welding shielding conductor of shading ring, outer wall and sensor housing internal wall transitions or interference fit, bellows front end is socketed outside the rear end of shading ring, bellows front end outer side socket sealing ring, hold-down ring is socketed outside sealing ring, hold-down ring and sensor housing contact internal walls, locking member is arranged on sensor housing tail end.

The front end of described shading ring, rear end transition position are with facade, and facade has cannelure, and facade contacts with the front end face of sealing ring.

Further improved plan: sealing ring is made up of rubber, inwall is with ring-shaped step, and front end outer side is with annular muscle, annular muscle and sensor housing interference fits, with wedge shape outside sealing ring rear end, hold-down ring is made up of stainless steel, and front end is with the wedge shape matched with sealing ring rear end wedge shape.

Compared with prior art, the invention has the advantages that: 1, the shielding conductor of cable welds with copper alloy shading ring, shading ring and sensor housing transition or interference fit, the contact resistance between the shielding conductor of cable and sensor housing can be made to control within the scope of 1 Ω, improve shielding conductor and housing effect altogether, realize good anti-EMC performance.2, bellows is arranged between shading ring and sealing ring, and rely on hold-down ring, locking member fastening, by arranging the structures such as annular muscle, cannelure, wedge shape, ring-shaped step, sealing ring and sensor housing, shading ring, hold-down ring, bellows is made to keep good contact, and there is certain elasticity, sealing effectiveness is stronger.3, according to each parts of shell dimension designed joint, the miniaturized design of transducer can while realizing the switching of transducer leading-out terminal, be met.

Accompanying drawing explanation

Fig. 1 is the integral installation figure of the embodiment of the present invention.

Fig. 2 is the shading ring structure cutaway view of the embodiment of the present invention.

Fig. 3 is the seal ring structure cutaway view of the embodiment of the present invention.

Fig. 4 is the hold-down ring structure cutaway view of the embodiment of the present invention.

Fig. 5 is the clamp nut structure cutaway view of the embodiment of the present invention.

Fig. 6 is the STRUCTURE DECOMPOSITION figure of the embodiment of the present invention.

In figure: 1, sensor housing, 2, shielding conductor, 3, shading ring, 31, support end, 32, shielding end, 33, cannelure, 4, sealing ring, 41, ring-shaped step, 42, annular muscle, 5, hold-down ring, 6, clamp nut, 7, bellows.

Embodiment

Below in conjunction with accompanying drawing, embodiment, the present invention is further described.

As shown in Figure 1, seal nipple is used for connecting sensor housing 1 and bellows 7, and seal nipple comprises shading ring 3, sealing ring 4, hold-down ring 5, clamp nut 6.

The structure of shading ring 3 as shown in Figure 2, the cylindrical shell that shading ring 3 is communicated by rear and front end forms, front end is shielding end 32, inwall welds with shielding conductor 2, front end outer wall and sensor housing transition or interference fit, the external diameter of front end is large compared with the external diameter of rear end, and rear end is support end 31, support end 31, for supporting bellows 9, prevents bellows 9 to be out of shape by the extruding of sealing ring 4.The facade of the transition position between shielding end 32 and support end 31 is with cannelure 33, after assembling with sealing ring 4, the front end face of facade and sealing ring 4 keeps good contact, and ensure that the suitable decrement of everything is to realize good sealing property, shading ring 3 adopts copper alloy to make.

Sealing ring 4 is made up of rubber, and structure as shown in Figure 3, with ring-shaped step 41, for assembling with bellows 9, fixing and sealing by the inwall of sealing ring 4; Sealing ring 4 front end outer side with annular muscle 42, the contact internal walls of annular muscle 42 and sensor housing, annular muscle adds the Elastic penetration between sensor housing 1, realizes good sealing effectiveness; Sealing ring 4 rear end is designed to wedge structure, is convenient to install hold-down ring 5.

Hold-down ring 5 is made up of stainless steel, and as shown in Figure 4, hold-down ring 5 Front-end Design wedgewise structure, the wedge shape of hold-down ring 5 front end matches with the wedge shape of sealing ring 4 rear end structure, is convenient to install and press seal ring 4.

Clamp nut 6 is made up of stainless steel, and as shown in Figure 5, clamp nut 6 is connected with the threads of sensor housing 1 structure.

Assembling process as shown in Figure 6, shielding conductor 2 loads in bellows 7, and clamp nut 6, hold-down ring 5, sealing ring 4 are enclosed within successively one end of bellows 7, shielding conductor 2 penetrates shading ring 3, after shielding conductor 2 has welded with shading ring 3 front inner wall, utilize corresponding frock to be pressed in sensor housing 1 by shading ring 3, make shading ring 3 and sensor housing 1 transition interference fit; Sealing ring 4 is contained in the outside of bellows 9 one end, loads the rear end support end 31 of shading ring 3 simultaneously, make to be in place with shading ring 3 afterbody inside bellows 9; Hold-down ring 5 is contained in outside sealing ring 4 in advance, utilizes spanner to be locked by clamp nut 6.

Obviously, the quantity of the quantity of cannelure and size, annular muscle and ring-shaped step and size, clamp nut length and size, overall structure size can adjust according to the actual requirements, and clamp nut also can adopt other locking member to replace.

Claims

1. be with the sylphon seal joint of function of shielding, it is characterized in that: seal nipple comprises shading ring, sealing ring, hold-down ring and locking member, shading ring is made up of copper alloy, the front inner wall welding shielding conductor of shading ring, outer wall and sensor housing internal wall transitions or interference fit, be socketed bellows front end outside the rear end of shading ring, bellows front end outer side socket sealing ring, be socketed hold-down ring outside sealing ring, hold-down ring and sensor housing contact internal walls, locking member is arranged on sensor housing tail end.

2. the sylphon seal joint of band function of shielding according to claim 1, is characterized in that: the front end of described shading ring, rear end transition position are with facade, and facade has cannelure, and facade contacts with the front end face of sealing ring.

3. the sylphon seal joint of band function of shielding according to claim 1, it is characterized in that: described sealing ring is made up of rubber, inwall is with ring-shaped step, front end outer side is with annular muscle, annular muscle and sensor housing interference fits, with wedge shape outside sealing ring rear end, hold-down ring is made up of stainless steel, and front end is with the wedge shape matched with sealing ring rear end wedge shape.