CN204190085U - A kind of explosion-proof latch - Google Patents

Abstract

The utility model provides an explosion-proof plug, which includes a socket and a plug. The socket includes a socket shell and a jack; It also includes a locking screw; a locking pin is arranged on the outer wall of the socket housing; a travel groove which slides and fits with the locking pin is opened on the guide groove sleeve, and a groove for locking the locking pin is opened on the travel groove. When the locking pin on the plug is stuck to the groove along the stroke groove on the socket, the pin on the plug is inserted into the jack on the socket, and the groove blocks the locking pin, that is, the plug housing and the socket housing realize locking. and a locking screw is installed on the guide groove sleeve of the socket. When the pin enters the socket, tighten the locking screw so that it presses against the socket housing to achieve locking. It can be seen that the explosion-proof plug provided by the utility model has a double locking function, which reduces the probability of the socket of the explosion-proof plug and the housing of the plug being loosened and separated.

Description

An explosion-proof plug

technical field

The utility model relates to the technical field of electric appliance plugging, in particular to an explosion-proof plug.

Background technique

The explosion-proof plug includes a socket and a plug. The socket is connected to the power supply side, and the plug is connected to the electrical equipment side. There is an explosion-proof surface between the plug and the socket. When an explosion occurs inside the explosion-proof plug, the flame will extinguish when it passes through the explosion-proof surface, and the outside cannot be detonated. Inflammable and explosive gases play the role of explosion-proof, therefore, the application of explosion-proof plugs is becoming more and more extensive.

It can be seen from the above that during the use of the explosion-proof plug, the plug and the plug need to be connected to prevent the plug and the plug from falling off and cause the internal and external air contact of the explosion-proof plug. Therefore how to prevent plug and socket separation is very urgent problem.

The utility model patent with the Chinese patent number CN 203377426 U discloses an explosion-proof bolt. The outer shell of the explosion-proof bolt includes three parts: a socket shell, a plug shell and an intermediate shell. Wherein, the intermediate housing is inserted into the socket housing, and the plug housing is inserted into the intermediate housing, and the upper part of the contact surface of the plug housing and the intermediate housing is provided with a screw structure that cooperates with each other and is used to lock the two. The plug housing locks the plug housing and the intermediate housing through the thread structure, so as to realize the locking of the plug and the socket. However, due to vibration and other reasons, the threads often become loose, which in turn leads to the loosening of the plug housing and the intermediate housing, and the leaky seal leads to the danger of the internal and external air contact of the explosion-proof plug.

To sum up, how to solve the problem of reducing the possibility of the explosion-proof plug socket and the plug shell being loose and separated, resulting in the danger of the explosion-proof plug being in contact with the outside air, is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of the present utility model is to provide an explosion-proof plug to achieve the purpose of reducing the probability of danger caused by the contact between the inside of the explosion-proof plug and the external air caused by the loosening and separation of the socket of the explosion-proof plug and the shell of the plug.

In order to achieve the above object, the utility model provides the following scheme:

An explosion-proof plug includes a socket and a plug connected with the socket, wherein the socket includes a socket housing and a jack arranged inside the socket housing; the plug includes a plug housing and a The pins inside the plug housing are provided with locking pins on the outer wall of the socket housing; the plug also includes a guide slot sleeve sleeved and fixed on the plug housing, and the guide slot sleeve A locking screw is also provided to lock the guide groove sleeve on the socket housing;

There is a stroke groove on the peripheral surface of the guide groove cover that slides with the locking pin, and a groove is formed at the end of the stroke groove to hold the locking pin;

When the locking pin is located at the first position of the travel groove, the socket housing is in contact with the plug housing to form a closed contact cavity;

When the lock pin is at the groove position at the second position of the travel groove, the pin enters the insertion hole.

Preferably, the stroke groove includes a first stroke groove, a first rotation groove, a second stroke groove and a second rotation groove, wherein the first stroke groove, the first rotation groove, the second stroke groove The second rotation groove is connected end to end in sequence, the top end of the first stroke groove passes through the top end of the guide groove sleeve, and the rotation direction of the second rotation groove is the same as that of the first rotation groove.

Preferably, the centerline of the first stroke groove and the centerline of the second stroke groove are parallel to the axis of the plug.

Preferably, the centerlines of the first rotation slot and the second rotation slot are perpendicular to the axis of the plug.

Preferably, the number of sets of the first stroke groove, the first rotation groove, the second stroke groove and the second rotation groove is two.

Preferably, the number of locking pins is two.

Preferably, the two locking pins are symmetrical about the axis of the socket.

Preferably, the number of locking screws is two.

Preferably, the maximum diameter of the explosion-proof bolt is 78mm, and the working length is 290mm.

It can be seen from the above technical solution that an explosion-proof plug includes a socket and a plug connected to the socket, wherein the socket includes a socket housing and a jack arranged inside the socket housing; the plug includes a plug housing and a The pins inside the plug housing are provided with locking pins on the outer wall of the socket housing; the plug also includes a guide slot sleeve set and fixed on the plug housing, and the guide slot sleeve is also provided with a locking pin for locking the guide slot sleeve. The locking screw on the socket housing; the circumference of the guide groove sleeve is provided with a travel groove that slides with the locking pin, and the end of the travel groove is provided with a groove that blocks the locking pin; when the locking pin When it is at the first position of the travel groove, the socket housing contacts the plug housing to form a closed contact cavity; when the locking pin is at the groove at the second position of the travel groove, the pin enters the socket. From the above, it can be known that in the explosion-proof bolt provided by the utility model, when the locking pin on the plug is stuck to the groove along the stroke groove on the socket, the pin on the plug is inserted into the jack on the socket. At this time, The groove clamps the locking pin, that is, the plug housing and the socket housing are locked; and the guide groove sleeve of the socket is also equipped with a locking screw. When the pin enters the jack, the socket housing is pressed, that is, The locking of the plug housing and the socket housing is realized. It can be seen that double locking can be realized between the plug housing and the socket housing of the explosion-proof bolt provided by the utility model. Even if the locking screw becomes loose, the groove can continue to block the locking pin, preventing the socket and the plug from The shell is loose and separated, thereby reducing the probability of danger caused by the contact between the inside of the explosion-proof plug and the outside air caused by the loose separation of the socket of the explosion-proof plug and the shell of the plug.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the sectional structure schematic diagram of the explosion-proof plug provided by the utility model;

Fig. 2 is the three-dimensional structure schematic diagram of the explosion-proof bolt provided by the utility model;

Fig. 3 is the schematic structural diagram of the front view of the explosion-proof bolt provided by the utility model;

Fig. 4 is a schematic cross-sectional structural view of the plug of the explosion-proof plug provided by the utility model;

Fig. 5 is the three-dimensional structure schematic diagram of the plug of the explosion-proof bolt provided by the utility model;

Fig. 6 is a front structural schematic diagram of the plug of the explosion-proof plug provided by the utility model;

Fig. 7 is a schematic cross-sectional structure diagram of the socket of the explosion-proof plug provided by the utility model;

Fig. 8 is a three-dimensional structural schematic diagram of the socket of the explosion-proof plug provided by the utility model;

Fig. 9 is a schematic diagram of the front view of the socket of the explosion-proof plug provided by the present invention.

Among them, in Fig. 1-Fig. 9:

Socket 1, plug 2, locking screw 3, socket housing 101, socket 102, guide groove cover 201, plug housing 202, pin 203, locking pin 1011, stroke groove 2011, groove 20111, first stroke Groove 20112, first rotation groove 20113, second stroke groove 20114, second rotation groove 20115.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Fig. 1-Fig. 9, which are structural schematic diagrams of the explosion-proof plug provided by the utility model. An explosion-proof plug includes a socket 1 and a plug 2 connected to the socket 1, wherein the socket 1 includes a socket housing 101 and a jack 102 disposed inside the socket housing 101; the plug 2 includes a plug housing 202 and a set The pin 203 inside the plug housing 202, the outer wall of the socket housing 202 is provided with a locking pin 1011; A locking screw 3 is provided to lock the guide groove cover 201 on the socket housing 101; the peripheral surface of the guide groove cover 201 is provided with a stroke groove 2011 which slides and fits with the locking pin 1011, and the second stroke groove 2011 on the stroke groove 2011 There is a groove 20111 for locking the locking pin 1011 at the position; when the locking pin 1011 is in the first position of the travel groove 2011, the socket housing 101 contacts the plug housing 202 to form a closed contact cavity; when locking When the pin 1011 is located at the position of the groove 20111 at the second position of the travel groove 2011 , the insertion pin 203 enters the insertion hole 102 .

From the above, it can be seen that in the explosion-proof plug provided by the utility model, when the locking pin 1011 on the plug 2 is stuck to the groove 20111 along the stroke groove 2011 on the socket 1, the pin 203 on the plug 2 is inserted into the socket 1 At this time, the groove 20111 blocks the locking pin 1011, that is, the plug housing 202 and the socket housing 101 are locked; and the guide groove sleeve 201 of the socket 1 is also equipped with a locking screw 3, When the insertion pin 203 enters the socket 102 , the socket housing 101 is pressed, that is, the locking of the plug housing 202 and the socket housing 101 is also realized. It can be seen that double locking can be realized between the plug housing 202 and the socket housing 101 of the explosion-proof bolt provided by the utility model, even if the locking screw 3 becomes loose, the groove 20111 can continue to block the locking pin 1011, Prevent the shells of socket 1 and plug 2 from loosening and separating, thereby reducing the probability of danger caused by the contact between the inside of the explosion-proof plug and the outside air.

The first position refers to the position where the locking pin 1011 is located in the travel groove 2011 when the socket housing 101 is just in contact with the plug housing 202 to form a closed contact cavity.

The second position means that the insertion pin 203 enters the insertion hole 102, and the locking pin 1011 is located at the position of the stroke groove 2011, that is, the position of the groove 20111 opened by the stroke groove 2011.

Since the explosion-proof bolt provided by the utility model does not include a switching switch, only the inside of the explosion-proof bolt is in the explosion-proof cavity to realize explosion-proof, which simplifies the structure.

In another embodiment provided by the present invention, the structure of the explosion-proof plug in this embodiment is similar to the structure of the explosion-proof plug in Embodiment 1, and the similarities will not be repeated, and only the differences will be introduced.

In this embodiment, the stroke groove 2011 includes a first stroke groove 20112, a first rotation groove 20113, a second stroke groove 20114 and a second rotation groove 20115, wherein the first stroke groove 20112, the first rotation groove 20113, the second The stroke groove 20114 and the second rotation groove 20115 are connected end to end in turn, the top of the first stroke groove 20112 runs through the top of the guide groove sleeve 201 of the plug 2, and the rotation direction of the second rotation groove 20115 and the first rotation groove 20113 is the same. When the locking pin 1011 reaches its bottom along the first travel groove 20112, the pin 203 of the plug 2 is located at a preset distance from the socket 102 of the socket 1, and the socket housing 101 and the plug housing 202 contact to form a closed Contact cavity; rotate the locking pin 1011 along the first rotation groove 20113 until the locking pin 1011 is located at the connection between the first rotation groove 20113 and the second stroke groove 20114, so that the rotation pin can be stuck along the second stroke groove 20114 to its reverse At the hook, the pin 203 of the plug 2 enters the jack 102 of the socket 1 . It can be seen that the explosion-proof bolt provided by the utility model, even if the rotating pin on the plug housing 202 comes out of the second rotating groove 20115, enters the first rotating groove 20113 along the second stroke groove 20114, and the inside of the plug 2 and the socket 1 It is still located in the explosion-proof cavity, preventing the socket 1 and plug 2 of the explosion-proof bolt from being closed tightly, causing danger.

Wherein, it should be noted that the stroke groove 2011 can be arbitrary, as long as the locking pin 1011 can be stuck to the groove 20111 of the stroke groove 2011, the stroke groove 2011 belongs to the scope of protection of the present invention.

In this embodiment provided by the utility model, the stroke groove 2011 includes the first stroke groove 20112, the first rotation groove 20113, the second stroke groove 20114 and the second rotation groove 20115. The inclination can be arbitrary. In this embodiment, The centerlines of the first travel slot 20112 and the second travel slot 20114 are parallel to the axis of the plug 2 , and the centerlines of the first rotation slot 20113 and the second rotation slot 20115 are perpendicular to the axis of the plug 2 . It should be noted that the first stroke groove 20112, the first rotation groove 20113, the second stroke groove 20114 and the second rotation groove 20115 as long as the locking pin 1011 can be stuck to the groove 20111 of the stroke groove 2011 all belong to the utility model. The scope of the new type of protection.

In this embodiment, the number of groups of the first stroke groove 20112 , the first rotation groove 20113 , the second stroke groove 20114 and the second rotation groove 20115 is 2 groups. Correspondingly, there are two locking pins 1011 . It should be noted that the number of groups of the first stroke groove 20112, the first rotation groove 20113, the second stroke groove 20114 and the second rotation groove 20115 can be other arbitrary groups, as long as the number of groups corresponding to the number of locking pins 1011 is satisfied All belong to the protection scope of the utility model.

In this embodiment, the two locking pins 1011 are symmetrical about the axis of the socket 1 . It should be noted that the position of the locking pin 1011 on the socket 1 can be arbitrary, as long as the position of the locking pin 1011 that can cooperate with the travel groove 2011 falls within the scope of protection of the present invention.

In this embodiment, there are two locking screws 3 . It should be noted that this embodiment is only an example, and the number of locking screws 3 can be any other number, as long as the number of locking screws 3 that can fix the socket housing 101 and the latch housing is satisfied. The scope of the new type of protection.

In this embodiment, the maximum diameter of the explosion-proof bolt is 78mm, and the working length is 290mm. Due to the small size of the explosion-proof plug design, the explosion-proof plug can be used in many places where the reserved space is small. Wherein, the working length refers to the total length of the explosion-proof bolt when the locking pin 1011 is located at the groove 20111 of the second position of the travel groove 2011 and when the pin 203 enters the socket 102 .

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. An explosion-proof plug, comprising a socket (1) and a plug (2) connected together with the socket (1), wherein the socket (1) includes a socket housing (101) and is arranged on the socket The jack (102) inside the housing (101); the plug (2) includes a plug housing (202) and pins (203) arranged inside the plug housing (202), characterized in that the The outer wall of the socket housing (101) is provided with a locking pin (1011); the plug (2) also includes a guide groove sleeve (201) sleeved and fixed on the plug housing (202), so The guide slot cover (201) is also provided with a locking screw (3) for locking the guide slot cover (201) on the socket housing (101); A travel groove (2011) that slides with the locking pin (1011) is formed on the peripheral surface of the guide groove sleeve (201), and a travel groove (2011) is formed at the end of the travel groove (2011) to hold the locking pin. groove (20111) of (1011); When the locking pin (1011) is located at the first position of the travel groove (2011), the socket housing (101) is in contact with the plug housing (202), forming a closed contact cavity; When the locking pin (1011) is at the position of the groove (20111) at the second position of the travel groove (2011), the pin (203) enters the insertion hole (102 ). 2. The explosion-proof bolt according to claim 1, characterized in that, the stroke groove (2011) comprises a first stroke groove (20112), a first rotation groove (20113), a second stroke groove (20114) and a second Rotary grooves (20115), wherein the first stroke groove (20112), the first rotation groove (20113), the second stroke groove (20114) and the second rotation groove (20115) are sequentially connected end to end , the top end of the first stroke groove (20112) runs through the top end of the guide groove sleeve (201), and the rotation direction of the second rotation groove (20115) and the first rotation groove (20113) are the same. 3. The explosion-proof plug according to claim 2, characterized in that, the centerline of the first stroke groove (20112) and the centerline of the second stroke groove (20114) are parallel to the centerline of the plug (2) axis. 4. The explosion-proof plug according to claim 3, characterized in that, the center lines of the first rotation groove (20113) and the second rotation groove (20115) are perpendicular to the axis of the plug (2). 5. The explosion-proof bolt according to claim 4, characterized in that, the first stroke groove (20112), the first rotation groove (20113), the second stroke groove (20114) and the second The number of groups of rotating grooves (20115) is 2 groups. 6. The explosion-proof bolt according to claim 1, characterized in that, the number of said locking pins (1011) is two. 7. The explosion-proof plug according to claim 6, characterized in that, the two locking pins (1011) are symmetrical about the axis of the socket (1). 8. The explosion-proof bolt according to claim 1, characterized in that, the number of said locking screws (3) is two. 9. The explosion-proof plug according to claim 1, characterized in that, the maximum diameter of the explosion-proof plug is 78 mm, and the working length is 290 mm.