CN115437081A

CN115437081A - Explosion-proof connector

Info

Publication number: CN115437081A
Application number: CN202210893306.9A
Authority: CN
Inventors: 侯向陶; 杨双成; 李卫可; 韩落乐; 张明明; 胡国闯
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-12-06
Anticipated expiration: 2042-07-27

Abstract

The invention discloses an explosion-proof connector, which comprises a main body component, a protective shell and a tail sealing component, wherein the main body component is provided with a first opening and a second opening; the protective shell is arranged outside the main body component, and the protective shell is in sealing connection with the main body component; afterbody sealing member is including the whole encapsulating cover that is the tube-shape, the protective housing afterbody is located to the encapsulating cover, is equipped with the seal through encapsulating shaping in the encapsulating cover for the part in the encapsulating cover glues and dies in order to prevent damaging, has guaranteed the quality of connector, can avoid among the prior art maintenance inconvenient, needs the on-the-spot wiring, is difficult to the problem of modular production, can protect the main part through protective housing and the concerted action of seal simultaneously, makes the connector be fit for using under explosive environment.

Description

Explosion-proof connector

Technical Field

The invention relates to the technical field of connectors, in particular to an explosion-proof connector.

Background

At present, the mode of accessing equipment in an explosion-proof case to an optical cable generally comprises the following steps: a hole is formed in the explosion-proof case, the gland is fixedly installed, and the optical cable penetrates through a horn mouth of the gland to be connected to equipment in the explosion-proof case. The glan tightly holds the cable after being locked to realize the fixation of the cable.

The access mode of adopting the optical cable to penetrate through the horn mouth in the prior art has the following defects: 1) The installation is inconvenient, the on-site wiring is needed, and the modular production is difficult; 2) The maintenance is inconvenient, the box needs to be opened when the optical cable is damaged, and the maintenance difficulty is large.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the explosion-proof connector which is not only suitable for being used in an explosion environment, but also can solve the problems that the connector in the prior art is inconvenient to maintain, needs field wiring and is difficult to modularize production.

In order to achieve the purpose, the invention adopts the specific scheme that:

an explosion-proof connector, comprising:

the main body part comprises a contact piece and a positioning seat;

the protective shell is arranged outside the main body component, and the protective shell is in sealing connection with the main body component;

the tail sealing component comprises a cylindrical glue filling sleeve, the tail of the protective shell is sleeved with the glue filling sleeve, and a sealing body formed through glue filling is arranged in the glue filling sleeve.

Furthermore, the main body part also comprises a fixed sleeve and a signal transmission line which is connected with the contact element and penetrates out of the fixed sleeve; the sealing connection between the fixed sleeve and the signal transmission line is realized through the plugging body, the protective shell and the fixed sleeve are in sealing connection, and a sealing body formed through glue pouring is arranged between the glue pouring sleeve and the signal transmission line.

Furthermore, a limiting step is arranged on the inner wall of the protective shell, the limiting step is provided with a stopping surface facing to the rear end, and the front end surface of the fixed sleeve corresponds to the stopping surface and is used for axially limiting the fixed sleeve.

Furthermore, the limiting step and the fixed sleeve are sealed through a sealing ring sleeved on the fixed sleeve.

Furthermore, the protection shell and the fixed sleeve are sealed in a pre-gluing mode.

Furthermore, sealing is realized between the protective shell and the fixed sleeve in a mode of forcibly installing the fixed sleeve in the protective shell.

Further, the shutoff body is the protective sheath, the one end of protective sheath is closely laminated on fixed sheathe in, the other end closely laminates on signal transmission line.

Furthermore, the plugging body is a plugging piece, and the sealing between the fixed sleeve and the signal transmission line is realized through the pre-glued and formed plugging piece.

Further, the shutoff body is the colloid that hinders of adorning in the through-hole of fixed cover by force, the one end that hinders the colloid and be close to the seal is equipped with and prevents that the colloid from permeating the fender of fixed cover and glue the ring.

Further, the rear end face of the sealing body exceeds the rear end face of the plugging body.

Has the advantages that:

(1) The flame-proof connector comprises a main body part, a protective shell and a tail sealing part, wherein the tail sealing part comprises a glue filling sleeve, a sealing body is formed by filling glue liquid with a certain height into the glue filling sleeve, so that the parts (such as a fixed sleeve, a signal transmission line and a plugging body) in the glue filling sleeve are stuck to prevent the parts in the glue filling sleeve from being damaged, the quality of the connector is ensured, the problems of inconvenient maintenance, on-site wiring and difficult modularized production in the prior art can be solved, and meanwhile, the main body part can be protected through the coordination effect of the protective shell and the sealing body, so that the connector is suitable for being used in an explosion environment.

(2) Before the tail part of the optical fiber connector for explosion suppression is subjected to glue filling, the protective shell and the fixed sleeve and the limited number transmission line are in sealed connection, so that glue is prevented from permeating into the optical fiber contact element, the optical fiber contact element can still slightly float in the fixed seat after the glue is solidified, the optical fiber contact element cannot be clamped when the head seat is inserted, and the guiding is smooth.

(3) The optical fiber connector for explosion suppression has the advantages of strong signal transmission capability, low time delay, large communication capacity and interference resistance.

(4) The invention has various sealing connection modes between the protective shell and the fixed sleeve and between the fixed sleeve and the optical fiber, and has safe and reliable sealing effect and simple structure.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic structural view of embodiment 2.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a schematic structural view of embodiment 3.

Fig. 6 is an exploded view of fig. 5.

FIG. 7 is a schematic structural diagram of the explosion-proof connector and the adaptive connector after being inserted.

Fig. 8 is a schematic structural diagram of the electrical connector.

Fig. 9 is a schematic structural diagram of the rf connector.

Graphic notation: 1. the protective casing, 2, the optical fiber contact member, 3, the positioning seat, 4, the sealing washer, 5, the fixed cover, 501, first ring segment, 502, second ring segment, 503, third ring segment, 6, the shutoff body, 601, the protective sheath, 602, the shutoff piece, 603, hinder the colloid, 7, the encapsulating cover, 8, the seal, 9, optic fibre, 10, the sealant, 11, the dress arch by force, 12, keep off the colloid ring, 13, the electrical contact, 14, the net twine, 15, the radio frequency contact member, 16, the position sleeve, 17, interior casing, 18 shell body.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.

A flame-proof connector comprises a main body part, a protective shell and a tail sealing part, wherein the main body part comprises a contact element and a positioning seat, the main body part extends forwards and backwards, and one end where the contact element is located is taken as a front end; the protective shell 1 is arranged outside the main body component, and the protective shell 1 is in sealing connection with the main body component; the tail sealing component comprises a cylindrical glue pouring sleeve 7, the glue pouring sleeve 7 is arranged at the tail of the protective shell 1, and a sealing body 8 formed by glue pouring is arranged in the glue pouring sleeve 7. It should be noted that, the sealing body 8 formed by glue pouring not only can achieve good adhesion to the cable, but also can achieve sealing. In addition, for long-distance sealing, the sealing effect of encapsulation is better, and the connector only can be filled with glue from the tail of the connector and can be filled with glue only vertically.

The main body part also comprises a fixed sleeve 5 and a signal transmission line which is connected with the contact element and penetrates out of the fixed sleeve 5; realize sealing connection through the shutoff body 6 between fixed cover 5 and the signal transmission line, be sealing connection between protective housing 1 and the fixed cover 5, be equipped with between encapsulating cover 7 and the signal transmission line through the fashioned seal 8 of encapsulating, the rear end face of seal 8 needs to surpass the rear end face of shutoff body 6. The sealing body 8 formed by glue pouring can enable components (such as a fixing sleeve, a signal transmission line and a plugging body) in the glue pouring sleeve to be stuck to prevent the components in the glue pouring sleeve from being damaged.

It should be noted that the front end face of the protective housing 1 exceeds the plugging face of the contact, as can be seen from fig. 7, the connector adapted to the connector in the present invention includes an inner housing 17 and an outer housing 18, and after the explosion-proof connector and the adaptive connector in the present invention are plugged in, the outer portion of the contact is protected by the inner housing 17, the protective housing 1 and the outer housing 18, which is pressure-resistant and smash-resistant, and is suitable for use in an explosion-proof environment.

The inner wall of the protective shell 1 is provided with a limiting step 101, the limiting step 101 is provided with a stopping surface facing to the rear end, and the front end surface of the fixed sleeve 5 corresponds to the stopping surface and is used for axially limiting the fixed sleeve 5.

Wherein, be sealing connection between protective housing 1 and the fixed cover 5, its sealed mode can realize sealedly through the sealing washer 4 of suit on fixed cover 5, also can realize sealedly through the mode of gluing of precoating, can realize sealedly with the mode of fixed cover 5 dress in protective housing 1 by force again.

It should be explained that the rear section of the fixing sleeve 5 and the optical fiber 9 are hermetically connected through the plugging body 6, and the structures of the plugging body 6 are different in different sealing modes, but the plugging body can only play a role in preventing the glue from penetrating into the optical fiber contact element 2.

Example 1

The flameproof connector in this embodiment is an optical fiber connector, as shown in fig. 1 and 2, the optical fiber connector mainly includes the following parts: the optical fiber connector comprises a protective shell 1, an optical fiber contact element 2, a positioning seat 3, a sealing ring 4, a fixing sleeve 5, a protective sleeve 601, a glue pouring sleeve 7, a sealing body 8 and a signal transmission line (optical fiber 9).

The optical fiber contact element 2 is arranged in the positioning seat 3 and can slightly float in the positioning seat 3. The positioning seat 3 is embedded in the protective shell 1 and is tightly pushed by the fixing sleeve 5, wherein the optical fiber contact element 2 and the positioning seat 3 are in clearance fit for ensuring the floating of the optical fiber contact element 2, and the fixing sleeve 5 is adopted to realize the axial limiting of the optical fiber contact element 2. The inner wall of the protective shell 1 is provided with a limit step 101, the inner wall of the limit step 101 is a sealing surface, and the sealing ring 4 is arranged at the sealing surface and is extruded by the protective shell 1 and the fixed sleeve 5. The fixing sleeve 5 is internally provided with a through hole with the extending direction consistent with that of the protective shell 1, and the optical fiber 9 is bonded with the optical fiber contact element 2 and then penetrates out of the through hole of the fixing sleeve 5. The blocking body 6 in this embodiment is a protective sleeve 601 in the form of a heat-shrinkable tube, one end of the protective sleeve 601 is tightly attached to the third circular ring segment of the fixed sleeve 5 after being heat-shrunk, and the other end is tightly attached to the optical fiber 9 after being heat-shrunk. The potting sleeve 7 is fixed on the protective shell 1, glue is filled in the potting sleeve 7, the height of the glue needs to exceed the rear end face of the protective sleeve 601, and a sealing body 8 is formed after the glue is solidified, so that the fixed sleeve 5, the protective sleeve 601 and the optical fiber 9 in the potting sleeve 7 are adhered. It should be noted that after the glue solution is cured, the optical fiber contact element 2 installed in the positioning seat 3 can still slightly float, so that the optical fiber contact element 2 cannot be locked when the head seat is plugged, and the guiding is smooth.

In detail, as can be seen from fig. 2, the fixing sleeve 5 sequentially includes a first circular ring segment 501, a second circular ring segment 502, and a third circular ring segment 503 from the front end to the back, wherein the first circular ring segment 501 is matched with the positioning seat 3, the second circular ring segment 502 is matched with the limiting step 101, a through hole is formed in the middle of the fixing sleeve 5, and the optical fiber 9 is bonded with the optical fiber contact element 2 and then penetrates out of the through hole. The protective sleeve 601 is integrally formed by two circular ring sections with different inner and outer diameters, the large inner diameter section is tightly attached to the third circular ring section of the fixed sleeve, and the small inner diameter section is tightly attached to the optical fiber 9.

Example 2

The flameproof connector in this embodiment is an optical fiber connector, please refer to fig. 3 and 4, and the optical fiber connector in this embodiment is different from the optical fiber connector in embodiment 1 in that: (1) The protective shell 1 and the fixed sleeve 5 are sealed in a pre-gluing mode, and a sealing rubber part 10 is formed after glue liquid is solidified; (2) The plugging body 6 is a plugging piece 602, and the gap between the fixed sleeve 5 and the optical fiber 9 is sealed by the plugging piece 602 formed by pre-coating glue; (3) The rear end face of the sealing body 8 exceeds the rear end face of the block piece 602.

Example 3

The flameproof connector in this embodiment is an optical fiber connector, please refer to fig. 5 and 6, and the difference between the optical fiber connector in this embodiment and the optical fiber connector in embodiment 1 is that: (1) The sealing between the protection shell 1 and the fixed sleeve 5 is realized by forcibly installing the fixed sleeve 5 in the protection shell 1; (2) The blocking body 6 is a glue blocking body 603 which is forcibly arranged in the through hole of the fixing sleeve 5, and one end of the glue blocking body 603, which is close to the sealing body 8, is provided with a glue blocking ring 12 for preventing glue from permeating into the fixing sleeve 5; (3) The rear end face of the sealing body 8 exceeds the rear end face of the glue blocking body 603.

In detail, in order to ensure the sealing effect after the forced installation, a plurality of circles of forced installation bulges 11 are arranged on the outer side wall of the plugging body 6. The outer side wall of the second ring section 502 of the fixed sleeve 5 is provided with a plurality of circles of forced installation protrusions 11.

Example 4

The flameproof connector in this embodiment is an electrical connector, and fig. 8 is a schematic structural diagram of the electrical connector.

As can be seen from fig. 8, the electrical connector mainly comprises four parts: the protective shell comprises a protective shell body 1, electric contacts 13, a positioning seat 3, a glue pouring sleeve 7 and a protective tube 14, wherein the electric contacts 13 are installed in the positioning seat 3, the positioning seat 3 is embedded in the protective shell body 1, the protective tube 14 is used for protecting a network cable, the electric contacts 13 are connected with the network cable in an end mode, glue is poured into the tail portion of the protective shell body 1 and the glue pouring sleeve 7, the height of glue liquid needs to exceed the front end face of the protective tube 14, and a sealing body 8 is formed after the glue liquid is solidified.

Example 5

The flameproof connector in this embodiment is a radio frequency connector, and fig. 9 is a schematic structural diagram of the radio frequency connector.

As can be seen from fig. 9, the rf connector mainly includes four parts: radio frequency contact 15, positioning seat 3, position sleeve 16, protective housing 1 and encapsulating cover 7 integrated into one piece, radio frequency contact 15 installs in positioning seat 3, and positioning seat 3 installs in position sleeve 16, and inside protective housing 1 was located to position sleeve 16, is equipped with the screw thread on the protective housing 1, protective housing 1 through set up on it the screw thread with to the corresponding screw-thread fit locking of connector, realize the connection of product. And (3) filling glue into the glue filling sleeve 7, wherein the height of the glue solution needs to exceed the rear end face of the positioning sleeve 16, and forming a sealing body 8 after the glue solution is cured.

Parts not described in detail herein are prior art.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.

Claims

1. An explosion-proof connector is characterized by comprising:

a body part comprising a contact and a positioning seat (3);

the protective shell (1) is arranged outside the main body component, and the protective shell (1) is in sealing connection with the main body component;

afterbody seal member, afterbody seal member is including whole encapsulating cover (7) that are the tube-shape, protective housing (1) afterbody is located in encapsulating cover (7), is equipped with in encapsulating cover (7) through encapsulating fashioned seal (8).

2. The flameproof connector of claim 1, characterized in that: the main body part also comprises a fixed sleeve (5) and a signal transmission line which is connected with the contact element and penetrates out of the fixed sleeve (5); realize sealing connection through shutoff body (6) between fixed cover (5) and the signal transmission line, be sealing connection between protective housing (1) and fixed cover (5), be equipped with between encapsulating cover (7) and the signal transmission line through encapsulating fashioned seal (8).

3. The flameproof connector of claim 2, characterized in that: the inner wall of the protective shell (1) is provided with a limiting step (101), the limiting step (101) is provided with a blocking surface facing to the rear end, and the front end surface of the fixed sleeve (5) corresponds to the blocking surface and is used for axially limiting the fixed sleeve (5).

4. The flameproof connector of claim 3, characterized in that: the limiting step (101) and the fixing sleeve (5) are sealed through a sealing ring (4) sleeved on the fixing sleeve (5).

5. The flameproof connector of claim 2, characterized in that: the protective shell (1) and the fixed sleeve (5) are sealed in a pre-gluing mode.

6. The flameproof connector of claim 2, characterized in that: sealing is achieved between the protective shell (1) and the fixed sleeve (5) through a mode that the fixed sleeve (5) is forcibly arranged in the protective shell (1).

7. The flameproof connector of claim 2, characterized in that: the blocking body (6) is a protective sleeve (601), one end of the protective sleeve (601) is tightly attached to the fixed sleeve (5), and the other end of the protective sleeve is tightly attached to the signal transmission line.

8. An explosion-proof connector according to claim 2, characterized in that: the blocking body (6) is a blocking piece (602), and sealing is achieved between the fixing sleeve (5) and the signal transmission line through the blocking piece (602) formed by pre-coating glue.

9. An explosion-proof connector according to claim 2, characterized in that: the blocking body (6) is a glue blocking body (603) which is forcibly arranged in a through hole of the fixing sleeve (5), and one end, close to the sealing body (8), of the glue blocking body (603) is provided with a glue blocking ring (12) which prevents the glue from permeating into the fixing sleeve (5).

10. The flameproof connector of claim 2, characterized in that: the rear end face of the sealing body (8) exceeds the rear end face of the plugging body (6).