CN219959580U - Explosion-proof plugging device - Google Patents

Abstract

The utility model discloses an explosion-proof plug device which comprises a plug, a socket, a shell and an insulating block, wherein a first counter bore is formed in the end face of the shell, a positioning groove is formed in the other end face of the shell, a plurality of conductive interfaces are formed in the first counter bore, a positioning block is arranged on the socket and is arranged in the positioning groove, the insulating block is arranged in the first counter bore and is in contact with the bottom of the conductive interfaces, a plurality of buckling positions are formed in the insulating block, a dead point is arranged on the conductive interfaces, a first spring is arranged at the dead point and is in contact with the side wall of the insulating block, a second counter bore is formed in the plug, a stop component is arranged at the bottom of the second counter bore, and a plurality of stop pieces are arranged on the inner wall of the second counter bore. The utility model is convenient for inserting and pulling out the positioning and identifying the phase power supply by arranging the positioning groove, the stop component adopts an integrated design, assembly parts are reduced, the assembly efficiency is improved, and the product has the advantages of convenient inserting and pulling out, high assembly efficiency, low failure rate and the like.

Description

Explosion-proof plugging device

Technical Field

The utility model relates to the technical field of explosion-proof plugging devices, in particular to an explosion-proof plugging device.

Background

The explosion-proof plugging device generally consists of a socket and a plug, the socket is formed by casting aluminum alloy, the socket is connected to a power supply side, the plug is connected to an electrical equipment end, and the plug is provided with a quick change-over switch. The explosion-proof plugging device is mainly used in chemical industry, various mines, petroleum and places needing explosion protection; and sub-division into single phases for illumination; three phases are used for machine tool equipment and other places. At present, the internal design of a quick change switch of a traditional explosion-proof plug device is complicated, the installation is inconvenient, and the service life and the failure rate are prolonged due to more parts.

The following problems also exist when the plug is connected to the socket; 1) When the conductive plug is connected with the conductive interface, before the conductive plug enters the inside of the shell, the conductive plug is aligned to the conductive interface in a visual mode, the design is inconvenient to plug, and when light is dark, the conductive plug can rub the surface of the insulating layer so as to find the conductive interface, so that the surface of the insulating layer drops and the conductive plug is worn to generate metal powder, and the insulating performance is reduced. 2) When the conductive plug is connected with the lead and the conductive interface is connected with the electrical equipment, a user needs to pay attention to whether the power supplies with different phases at the interface correspond to the phase power supply of the electrical equipment or not when the conductive plug is connected with the lead, and the situation that the electrical equipment cannot be started due to connection error occurs. The inventors have thus devised an advantageous design to find a solution to the above-mentioned problems, and the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to overcome the defects of the design of the traditional explosion-proof plugging device and provides a product which is convenient to plug, high in assembly efficiency and low in failure rate.

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides an explosion-proof grafting device, includes plug, socket, casing, insulating piece, the terminal surface of casing is equipped with first counter bore, and another terminal surface is equipped with positioning groove, first counter bore is equipped with a plurality of conductive interfaces, the socket is equipped with the locating piece, and sets up in positioning groove, the insulating piece sets up in first counter bore to with conductive interface's bottom contact, the insulating piece is equipped with a plurality of knot position, conductive interface is equipped with quiet point, quiet point is equipped with first spring to with insulating piece's lateral wall contact, the plug is equipped with the second counter bore, the bottom of second counter bore is equipped with the retaining subassembly, the inner wall of second counter bore is equipped with a plurality of moving plates, the plug is equipped with the bellying to laminating the inner wall of second counter bore, the plug is installed in the casing, and the retaining subassembly contacts with detaining the position, and the bellying laminating is in the inner wall of first counter bore, and first spring acts on quiet point, makes the head in close contact of moving plate and quiet point.

Preferably, the socket is provided with a plurality of first interfaces, arc baffles are arranged between the first interfaces, the first interfaces are provided with conductive plugs, the conductive plugs are arranged on the conductive interfaces and are in contact with the inner walls of the conductive interfaces, the top of the positioning block is provided with a chamfer, and the protruding part is provided with a limiting notch.

Preferably, the plug is provided with a plurality of binding posts, the terminal surface of binding post is equipped with the screw thread blind hole, and another terminal surface is equipped with the movable point to be connected with the moving plate through the riveting, the bottom of second counter bore is equipped with first recess, the bottom of second counter bore is equipped with the blind hole, the bottom of blind hole is equipped with the location blind hole.

Preferably, a first limiting block is arranged at the bottom of the conductive interface, a static piece is arranged on the first limiting block, the static piece is in vertical relation with the first limiting block, the static point is riveted to the static piece, and the first spring is in contact with the static piece.

Preferably, the center of first counter bore is equipped with the recess of stepping down, the inner wall of first counter bore is equipped with the fourth stopper, and with spacing breach one end contact, the distance setting of first counter bore and casing terminal surface is protruding portion and is not contacted with the bottom of first counter bore, the bottom of first counter bore is equipped with a plurality of spacing recesses with the recess of stepping down as the center, spacing recess is equipped with the second interface, the second interface is located conductive plug entrance and is equipped with the chamfer, conductive interface installs in the second interface, makes first stopper set up in spacing recess.

Preferably, the bottom of insulating piece is equipped with the second stopper, and sets up in the recess of stepping down, the bottom of insulating piece still is equipped with the third stopper, and sets up in spacing recess to with first stopper contact, the lateral wall of insulating piece is equipped with a plurality of blind holes of stepping down, quiet point sets up in the blind hole of stepping down, first spring and the bottom contact of blind hole of stepping down, the top of insulating piece is equipped with the contact block to with the blind hole contact, detain the side wall that is located the contact block that is located, the top of contact block is equipped with the cylinder, and sets up in the location blind hole.

Preferably, the retaining assembly comprises second spring, retaining knot, shell, the shell is equipped with the cavity, the shell is installed in first recess, and the cavity is towards the bottom in first recess, the cavity is equipped with the breach, the retaining knot sets up in the breach, the both sides of retaining knot are equipped with the baffle, the retaining knot is equipped with the guide post, the second spring sets up in the lateral wall of cavity, and acts on the second spring, makes the retaining knot protrusion in the shell to contact with the knot position, the baffle contacts with the lateral wall of cavity, the second spring sets up in the guide post.

Preferably, the positioning groove and the positioning block are in a T shape, and the first groove and the shell are in a convex shape.

The beneficial effects are that:

compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the positioning block is matched with the positioning groove, so that the problem that whether power supplies with different phases correspond to the phase power supply of the electrical equipment is solved, the checking and identifying time is reduced, and as the connection part of the conductive plug and the conductive interface is not visually obstructed, the second interface is provided with the chamfer, so that the conductive terminal can conveniently enter the conductive interface, the conductive plug and the end face of the shell are prevented from rubbing, and when a person rotates the socket by mistake, the positioning block can play a role in bearing the action force, and the conductive plug is prevented from being deformed by force, so that the product has the advantage of being convenient to plug.

(2) According to the utility model, through the design of the concave cavity, the second spring and the retaining buckle are conveniently placed into the cavity by the automatic equipment, the number of parts of the retaining assembly is small, the automatic mass production efficiency is greatly improved, the design can effectively reduce the assembly process and improve the production efficiency, the consistency of production quality is improved, the problem of higher failure rate caused by the complex design of the change-over switch of the traditional explosion-proof plug-in device is solved, meanwhile, the concave cavity faces the bottom of the first groove, the erosion of air to the second spring is reduced, the influence of other parts on the connection between the second spring and the retaining buckle is avoided, and the product has the advantages of high assembly efficiency and low failure rate.

Drawings

FIG. 1 is a schematic view of an explosion-proof plug device according to the present utility model;

FIG. 2 is a schematic side sectional view of an explosion-proof plugging device according to the present utility model;

FIG. 3 is an exploded view of an explosion-proof plug device of the present utility model;

FIG. 4 is a second exploded view of an explosion-proof plug device of the present utility model;

FIG. 5 is a top cross-sectional view of the internal structure of an explosion-proof plug device of the present utility model;

FIG. 6 is a schematic view of a plug of an explosion-proof plugging device according to the present utility model;

FIG. 7 is a schematic view of the housing of an explosion-proof plug device according to the present utility model;

FIG. 8 is a schematic view of a socket of an explosion-proof plugging device according to the present utility model;

FIG. 9 is a schematic diagram of an insulating block of an explosion-proof plug device according to the present utility model;

the correspondence between the reference numerals and the component names in the drawings is as follows:

reference numerals: 1. a plug; 2. a socket; 3. a housing; 4. an insulating block; 5. a conductive interface; 6. a backstop assembly; 7. chamfering;

11. a second counterbore; 12. a moving plate; 13. a boss; 14. a connection terminal; 15. limiting notch;

21. a positioning block; 22. a first interface; 23. arc-shield plate; 24. a conductive plug;

31. a first counterbore; 32. a positioning groove;

41. a buckling position; 42. a second limiting block; 43. a third limiting block; 44. a yielding blind hole; 45. a contact block; 46. a cylinder;

51. a dead point; 52. a first spring; 53. a first limiting block; 54. static piece;

61. a second spring; 62. a retaining buckle; 63. a housing;

111. a first groove; 112. positioning the blind hole; 113. a blind hole;

141. a threaded blind hole; 142. a moving point;

311. a relief groove; 312. a limit groove; 313. a second interface; 314. a fourth limiting block;

621. a baffle; 622. a guide post;

631. a cavity; 632. and (5) a notch.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements 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 utility model.

Referring to fig. 1 to 5, an explosion-proof plug device comprises a plug 1, a socket 2, a housing 3 and an insulating block 4, wherein a first counter bore 31 is arranged on the end surface of the housing 3, a positioning groove 32 is arranged on the other end surface, a plurality of conductive interfaces 5 are arranged on the first counter bore 31, a positioning block 21 is arranged on the socket 2 and is arranged on the positioning groove 32, the insulating block 4 is arranged on the first counter bore 31 and is contacted with the bottom of the conductive interfaces 5, a plurality of buckling positions 41 are arranged on the insulating block 4, a dead point 51 is arranged on the conductive interfaces 5, a first spring 52 is arranged on the dead point 51 and is contacted with the side wall of the insulating block 4, a second counter bore 11 is arranged on the plug 1, a stop component 6 is arranged on the bottom of the second counter bore 11, a plurality of moving plates 12 are arranged on the inner wall of the second counter bore 11, the plug 1 is provided with the bulge 13 and is attached to the inner wall of the second counter bore 11, the plug 1 is arranged on the shell 3, the stop component 6 is contacted with the buckling position 41, the moving plate 12 is contacted with the head of the dead point 51, the first spring 52 acts on the dead point 51 to enable the bulge 13 to be attached to the inner wall of the first counter bore 31, when the moving plate 12 is contacted with the head of the dead point 51, the dead point 51 is pressed inwards by the stress, the first spring 52 is pressed by the dead plate 54 to be in an energy storage state, and after the stress is stopped, the first spring 52 releases counterforce to the dead plate 54 to enable the head of the dead point 51 to be in close contact with the moving plate 12;

it should be noted that the socket 2 is provided with a plurality of first interfaces 22, arc baffles 23 are arranged between the first interfaces 22, the first interfaces 22 are provided with conductive plugs 24, the conductive plugs 24 are arranged on the conductive interfaces 5 and are in contact with the inner walls of the conductive interfaces 5, the top of the positioning block 21 is provided with chamfers 7, the protruding part 13 is provided with a limiting notch 15, the limiting notch 15 is matched with a fourth limiting block 314 for use, the first interfaces 22 are convenient for installing the conductive plugs 24, the arc baffles 23 prevent electric arcs generated during contact or breaking between wires from affecting the similar conductive plugs 24, and the purpose of designing chamfers 7 at the top of the positioning block 21 is to facilitate entering the positioning grooves 32 and reduce friction between the positioning grooves 32;

it should be noted that the plug 1 is provided with a plurality of connection terminals 14, the end face of the connection terminal 14 is provided with a threaded blind hole 141, the other end face is provided with a moving point 142 and is in contact with the moving plate 12, the bottom of the second counter bore 11 is provided with a first groove 111, the yielding blind hole 44 also plays a role in supporting the first spring 52, the connection terminal 14 plays a role in supporting a power supply, the threaded blind hole 141 is convenient to connect with a wire, the moving point 142 rivets the moving plate 12, connection stability is improved, heating at the connection position and reduction of contact resistance are avoided, the first groove 111 is matched with the shell 63 for use, the yielding blind hole 44 is matched with the contact block 45 for use, and the positioning blind hole 112 is matched with the cylinder 46 for use;

it should be noted that the bottom of the conductive interface 5 is provided with a first limiting block 53, the first limiting block 53 is provided with a static piece 54, the static piece 54 is in a vertical relation with the first limiting block 53, a static point 51 is riveted on the static piece 54, the first spring 52 is contacted with the static piece 54, the first limiting block 53 is matched with a limiting groove 312 for use, the static piece 54 plays a role of bearing a power supply carrier, and the riveted connection mode ensures that the static point 51 is connected with the static piece 54 more tightly, thereby avoiding heating at the connection part and reducing the contact resistance value;

it should be noted that, the center of the first counter bore 31 is provided with a yielding groove 311, the inner wall of the first counter bore 31 is provided with a fourth limiting block 314, and contacts with one end of the limiting notch 15, the distance between the first counter bore 31 and the end face of the shell 3 is set such that the protruding part 13 is not contacted with the bottom of the first counter bore 31, the bottom of the first counter bore 31 is provided with a plurality of limiting grooves 312 with the yielding groove 311 as the center, the limiting grooves 312 are provided with a second interface 313, the second interface 313 is provided with a chamfer 7 at the entrance of the conductive plug 24, the conductive interface 5 is mounted on the second interface 313, the first limiting block 53 is arranged in the limiting grooves 312, the yielding groove 311 is matched with the second limiting block 42, the fourth limiting block 314 plays a role in limiting the rotation angle and the limiting direction of the stopping component 6, the limiting grooves 312 play a role in preventing the conductive interface 5 from rotating along with the plug 1 to change the position of the second interface 313, the chamfer 7 is provided for guiding the conductive plug 24 to the conductive interface 5, and the end face of the conductive plug 24 is prevented from rubbing against the shell 3;

it is worth mentioning that the bottom of the insulating block 4 is provided with the second limiting block 42 and is arranged in the abdication groove 311, the bottom of the insulating block 4 is also provided with the third limiting block 43 and is arranged in the limiting groove 312 and is in contact with the first limiting block 53, the side wall of the insulating block 4 is provided with a plurality of abdication blind holes 44, the dead point 51 is arranged in the abdication blind holes 44, the first spring 52 is in contact with the bottom of the abdication blind holes 44, the top of the insulating block 4 is provided with the contact block 45, the buckling bit 41 is arranged on the side wall of the contact block 45, the top of the contact block 45 is provided with the cylinder 46 and is arranged in the positioning blind hole 112, the second limiting block 42 plays a role of preventing the insulating block 4 from rotating, the abdication blind holes 44 are matched with the dead point 51 to prevent the conductive interface 5 from changing the position along with the rotation of the plug 1, meanwhile, the abdication blind holes 44 are also a supporting role of the first spring 52, when the plug 1 is connected with the shell 3, the blind holes 113 apply downward pressure to the contact block 45, the third limiting block 43 of the insulating block 4 is tightly attached to the first limiting block 53, the rotation of the insulating block 4 is prevented from rotating and the conductive interface 4 is strengthened, the position of the cylinder 46 is not influenced by the first limiting block 4, and the local force is not influenced by the cylinder point of the first positioning blind hole 4, and the first elastic block is not influenced by the cylinder hole and the cylinder 52;

it should be noted that, the retaining component 6 is composed of a second spring 61, a retaining buckle 62 and a casing 63, the casing 63 is provided with a concave cavity 631, the casing 63 is mounted in the first groove 111, the concave cavity 631 faces to the bottom of the first groove 111, the concave cavity 631 is provided with a notch 632, the retaining buckle 62 is arranged in the notch 632, two sides of the retaining buckle 62 are provided with baffle plates 621, the retaining buckle 62 is provided with a guide post 622, the second spring 61 is arranged on the side wall of the concave cavity 631 and acts on the second spring 61 to enable the retaining buckle 62 to protrude out of the casing 63 and contact with the buckling position 41, the baffle plates 621 are contacted with the side wall of the concave cavity 631, the second spring 61 is arranged on the guide post 622, as the concave cavity 631 is open and is convenient for the automatic equipment to assemble, the notch 632 is convenient for the telescopic activity of the retaining buckle 62, the baffle plates 621 play a role of preventing the retaining buckle 62 from falling off under the influence of acting force, the guide post 622 plays a role of guiding the second spring 61, so that acting force is more concentrated;

it should be noted that, the positioning groove 32 and the positioning block 21 are set to be T-shaped, the first groove 111 and the casing 63 are set to be convex, the T-shaped is set to prevent the socket 2 from rotating, when someone rotates the socket 2 by mistake, the positioning block 21 can play a role of bearing the action force to prevent the conductive plug 24 from being deformed by force, the convex design plays a role of reinforcing the fixity of the casing 63 itself, and preventing the casing 3 or the plug 1 from rotating left and right to play a displacement influence on the casing 63.

The principle of use of the utility model will now be described as follows:

one end of the conductive plug 24 is connected with the power end, one end of the wiring terminal 14 is connected with the power end of the equipment through a screw, the socket 2 is connected with the shell 3, the positioning block 21 determines the position of the positioning groove 32 in a visual mode, the conductive plug 24 is influenced by the chamfer 7 of the first interface 22, enters the conductive interface 5, the positioning block 21 enters the positioning groove 32, the socket 2 is fixed on the shell 3 through interference fit, at this time, the conductive plug 24 is in contact with the conductive interface 5, the dead point 51 is in contact with the moving plate 12, and the wiring terminal 14 is in a conducting state with the conductive plug 24.

When the explosion-proof plugging device is in a disconnection state, the shell 3 is held by a hand to rotate the plug 1, the fourth limiting block 314 leaves one side of the limiting gap 15 and moves towards the other side, the contact block 45 extrudes the backstop buckle 62 to enable the backstop buckle 62 to retract into the concave cavity 631, the second spring 61 is in an energy storage state, when the fourth limiting block 314 contacts with the other side of the limiting gap 15, the second spring 61 releases a counterforce to push the backstop buckle 62 to extend and contact with the buckling position 41 as the resistance of the contact block 45 to the backstop buckle 62 disappears, at the moment, the moving plate 12 does not contact with the dead point 51, the connection terminal 14 is disconnected with the conductive plug 24, and only the plug 1 is required to rotate in the opposite direction to restore the conducting state.

Through the design scheme, the product can realize the advantages of convenient plugging, high assembly efficiency and low failure rate.

The foregoing is a further elaboration of the present utility model in connection with the detailed description, and it is not intended that the utility model be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the utility model, should be considered as falling within the scope of the utility model as defined in the appended claims.

Claims (8)

1. An explosion-proof plug device, characterized in that: including plug (1), socket (2), casing (3), insulating piece (4), the terminal surface of casing (3) is equipped with first counter bore (31), and the other terminal surface is equipped with positioning groove (32), first counter bore (31) are equipped with a plurality of conductive interface (5), socket (2) are equipped with locating piece (21), and set up in positioning groove (32), insulating piece (4) set up in first counter bore (31) to with conductive interface (5)'s bottom contact, insulating piece (4) are equipped with a plurality of knot position (41), conductive interface (5) are equipped with quiet point (51), quiet point (51) are equipped with first spring (52) to with insulating piece (4)'s lateral wall contact, plug (1) are equipped with second counter bore (11), second counter bore (11)'s bottom is equipped with stopping subassembly (6), second counter bore (11)'s inner wall is equipped with a plurality of moving pieces (12), plug (1) are equipped with bellying portion (13) to laminating inner wall of second counter bore (11), plug (1) are installed in casing (3) and are located the contact point (52) of a quiet point (41) with a spring (13), the moving plate (12) is tightly contacted with the head of the stationary point (51).

2. An explosion-proof plug device according to claim 1, wherein: the socket (2) is provided with a plurality of first interfaces (22), arc baffles (23) are arranged between the first interfaces (22), the first interfaces (22) are provided with conductive plugs (24), the conductive plugs (24) are arranged on the conductive interfaces (5) and are in contact with the inner walls of the conductive interfaces (5), chamfers (7) are arranged at the tops of the positioning blocks (21), and limiting gaps (15) are formed in the protruding portions (13).

3. An explosion-proof plug device according to claim 2, wherein: the plug (1) is provided with a plurality of binding posts (14), the terminal surface of binding post (14) is equipped with screw thread blind hole (141), and the other terminal surface is equipped with movable point (142) to be connected with moving plate (12) through the riveting, the bottom of second counter bore (11) is equipped with first recess (111), the bottom of second counter bore (11) is equipped with blind hole (113), the bottom of blind hole (113) is equipped with location blind hole (112).

4. An explosion-proof plug device according to claim 3, wherein: the bottom of electrically conductive interface (5) is equipped with first stopper (53), first stopper (53) are equipped with quiet piece (54), quiet piece (54) are perpendicular relation with first stopper (53), quiet point (51) riveting is in quiet piece (54), first spring (52) and quiet piece (54) contact.

5. The explosion-proof plug apparatus according to claim 4, wherein: the center of first counter bore (31) is equipped with recess (311) of stepping down, the inner wall of first counter bore (31) is equipped with fourth stopper (314), and with the one end contact of spacing breach (15), the distance setting of first counter bore (31) and casing (3) terminal surface is bellying (13) not with the bottom contact of first counter bore (31), the bottom of first counter bore (31) is equipped with a plurality of spacing recesses (312) with recess (311) of stepping down as the center, spacing recess (312) are equipped with second interface (313), second interface (313) are located conductive plug (24) entrance and are equipped with chamfer (7), conductive interface (5) are installed in second interface (313), make first stopper (53) set up in spacing recess (312).

6. An explosion-proof plug apparatus according to claim 5, wherein: the bottom of insulating piece (4) is equipped with second stopper (42), and sets up in recess (311) of stepping down, the bottom of insulating piece (4) still is equipped with third stopper (43), and sets up in spacing recess (312) to with first stopper (53) contact, the lateral wall of insulating piece (4) is equipped with a plurality of blind holes (44) of stepping down, quiet point (51) set up in blind hole (44) of stepping down, first spring (52) and the bottom contact of blind hole (44) of stepping down, the top of insulating piece (4) is equipped with contact block (45) to with blind hole (113) contact, detain position (41) and set up in the lateral wall of contact block (45), the top of contact block (45) is equipped with cylinder (46), and sets up in location blind hole (112).

7. The explosion-proof plug apparatus according to claim 6, wherein: the anti-return assembly (6) comprises a second spring (61), an anti-return buckle (62) and a shell (63), wherein the shell (63) is provided with a concave cavity (631), the shell (63) is arranged on the first groove (111), the concave cavity (631) faces the bottom of the first groove (111), the concave cavity (631) is provided with a notch (632), the anti-return buckle (62) is arranged on the notch (632), baffles (621) are arranged on two sides of the anti-return buckle (62), the anti-return buckle (62) is provided with a guide post (622), the second spring (61) is arranged on the side wall of the concave cavity (631) and acts on the second spring (61), the anti-return buckle (62) protrudes out of the shell (63) and contacts with the buckling position (41), the baffles (621) contact with the side wall of the concave cavity (631), and the second spring (61) is arranged on the guide post (622).

8. The explosion-proof plug apparatus according to claim 7, wherein: the positioning groove (32) and the positioning block (21) are in T-shaped, and the first groove (111) and the shell (63) are in convex shapes.