JPH03110769A - Explosion-proof type insertion connector - Google Patents

Abstract

PURPOSE:To make a connector function effectively even in case of an emergency of a human error by composing an inner insertion port of an insert container slidable at an outer insertion port of a base container. CONSTITUTION:An inner insertion port 1A is formed at the inner surface at the top of an insert container 1, a male screw 1B is formed at the outer surface of the top, and a ring nut 8 inserted to a base container 4 is composed to screw freely to the male screw 1B of the insert container 1. As a result, even though a power source switch is turned incorrectly or not turned off to generate a short circuit when the connecting wire is opened, the insert container 1 is maintained in the screwed condition to the base container 4 through the ring nut 8 in that phase, and thereby a fire generated between a wall socket terminal board 13 and a plug terminal board 16 at the separation never leaks to the outside of an insertion connector S from between the both boards, and the fire is extingushed spontaneously. Consequently, in an emergency case of a human error, an extensively good explosion-proofing property is demonstrated.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a flameproof explosion-proof plug-in connector.

(Conventional technology) Conventionally, when periodically inspecting and maintaining various equipment at power plants and various chemical factories, for example, when it is an electric valve,
It requires a power circuit cable with about 3 cores and 16 to 21
A core-sized control circuit cable is drawn in and connected.

When inspecting and servicing this electric valve, it goes without saying that the specified main switch must be turned off, the drive switch for the electric valve itself must be turned off, and the above-mentioned connections must be opened individually before various inspections and maintenance are performed. It has become.

(Problem to be Solved by the Invention) However, the main switches and drive switches for a large number of devices are grouped in various places or scattered in a wide variety of situations, and it is often the case that the power switch is turned off incorrectly. If you forget to disconnect the wire, it can cause a short circuit when you open the wire, which is extremely dangerous if it is installed in a flammable atmosphere.

On the other hand, even if the wires are opened reliably, when reconnecting them to restore the system, there is a possibility that the wires may be connected incorrectly, causing damage to the equipment, or causing accidents due to malfunctions. There was much room for improvement in the work efficiency of the repeated disconnection work and restoration work by reconnection.

Of these, in order to solve the latter problem, it is possible to solve the problem by connecting the circuit of the multi-core cable to a plug-in system using multiple sets of plugs and outlets. It cannot be used for any other purpose.

(Means for Solving the Problems) Therefore, in the present invention, in order to solve the above problems, an inner insertion port 1A is provided on the inner peripheral surface of the tip of the insert container 1, and a male thread 1B is provided on the outer peripheral surface of the tip. an outlet terminal board 13 is provided inside the inner insertion port 1A, and an outer insertion port 4A is formed on the outer peripheral surface of the tip of the base container 4, and a collar portion 6 is formed on the outer peripheral surface of the outer insertion port 4A. A plug terminal board 16 is installed inside the base container 4 inside the outer insertion port 4A, and a plug 23, 24 protrudes from the plug terminal board 16 and a power outlet protrudes from the outlet terminal board 13). 21.22
By screwing the ring nut inserted into the base container 4 into the male screw 1B of the insert container 1, the inner of the insert container 1 is inserted into the outer insertion opening 4A of the base container 4. By providing a plug-in connector with an explosion-proof structure in which the plug-in port 1A is slidably connected, the plug-in connector can function effectively even in the unlikely event of human error.

(Function) Therefore, when the ring nut 8 is loosened and the connection is opened, even if a short circuit occurs at the moment when the receptacles 21 and 22 are separated from the plugs 23 and 24 as shown in Fig. 4, At that stage, the female thread 8A of the ring nut 8 on the base container 4 side is still screwed into the male thread 1B on the insert container 1 side by about half to one-third of the width.

Therefore, the flame generated between the outlet terminal board 13 and the plug terminal board 16 at the time of disconnection passes through between the inner insertion port 1A of the insert container 1 and the outer insertion port 4A of the base container 4, and is connected to the plug-in connection. The fire is naturally extinguished and contained in the insertion chamber R formed between the outlet terminal board 13 and the plug terminal board 16 without leaking to the outside of the container S.

(Example) Hereinafter, an explosion-proof plug-in connector S according to the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a pressure-resistant bottomed cylindrical outlet-side insert container made of aluminum alloy, with an opening formed on the front surface of one insertion side, and an inner periphery of the tip with an inner insertion container of an appropriate width. In addition to forming a port 1A, a male thread 1B having a width of about half of the inner insertion port 1A is formed on its outer periphery, and
Two large and small mounting holes 2.3 are formed in the side wall IC on the other cable lead-in side.

Reference numeral 4 denotes a base container on the plug side that is made of aluminum alloy and has a pressure-resistant bottomed cylindrical shape, and the front surface of one insertion side is formed with an opening, and the inner insertion port 1A described above is formed on the outer periphery of the tip. An outer insertion port 4A having a width approximately equal to the width of the outer insertion port 4A is formed, and one attachment hole 5 is formed in the center of the side wall portion 4B on the other cable lead-in side.

Reference numeral 6 denotes a flange protruding annularly from the outer periphery of the rear end of the outer insertion port 4A of the base container 4, and 7 denotes an O-ring fitted in a groove recessed annularly in the front surface of the flange 6. It is supported in pressure contact with the tip end surface of the insert container 1.

Reference numeral 8 denotes a ring nut of an appropriate width that is inserted from the rear end of the base container 4, and a female screw 8A having approximately the same width as the male screw 1B is formed at the inner periphery of the approximately central portion of the ring nut. The female screw 8A can be freely screwed into the screw 1B.

Reference numeral 9 denotes a flange protruding annularly from the inner periphery of the rear end of the ring nut 8, and the flange 9 can freely come into contact with the rear surface of the flange 6. Reference numeral 10 prevents the ring nut 8 from being pulled out. It is a ring gasket for use in the flange 6, and is fitted and supported in a groove formed in an annular shape on the rear outer circumferential surface of the flange 6.

11, I1A is a suitable number of screw holes and small diameter peepholes that are bored on the outer periphery of the ring nut 8 near the opening end, and a pin 12 for preventing rotation of the ring nut is screwed into the screw hole 11. The peephole 11A is connected to the male screw 1B of the insert container 1 and the non-threaded surface 1D of the rear outer peripheral surface thereof.
The state of the boundary line with the external thread can be visually recognized from the outside, and the state of screw engagement with the male thread 1B can be confirmed.

13 is an insulated terminal board on the outlet side (hereinafter referred to as the outlet terminal board), and its size is 90 to 10 mm in diameter.
0 mm, and the thickness is about 30 mm, and an appropriate gap is formed on the inner circumferential surface of the insert container 1 at a distance of about the width of the inner insertion port 1A from the open end of the insert container 1. It is inserted in a loosely fitted state with the two parts separated.

Reference numeral 14 denotes a flange for attaching and fixing the outlet terminal board 13, which is protruded in an annular shape from the inner circumferential surface of the insert container 1 at approximately the middle.
It is attached and fixed with 5.

In this case, if the outlet terminal board 13 is fitted and supported in close contact with the inner circumferential surface of the insert container 1, the flange 14 may be replaced with 3 to 4 of the inner circumferential surface of the insert container 1.
The bracket 14A is partially protruded at a suitable position,
It is also possible to attach and fix the outlet terminal board 13 to the bracket 14A.

16 is an insulated terminal board on the plug side (hereinafter referred to as a plug terminal board), which has a diameter of about 90 to 100 mm and a thickness of about 30 mm.
It is loosely fitted into the inner circumferential surface of the inner circumferential surface at a distance approximately equal to the width of the outer insertion port 4A from the open end of the inner circumferential surface, with an appropriate gap therebetween.

17 is a flange portion for attaching and fixing the plug terminal board 16;
An annular projection is provided on the inner circumferential surface of the base container 4 at approximately the middle thereof, and a plug terminal board 16 is attached and fixed to the flange 17 with bolts 16 .

In this case as well, if the plug terminal board 16 is fitted and supported in close contact with the base container 4, instead of the flange 17 described above, the plug terminal board 16 should be placed at approximately 3 to 4 appropriate positions on the inner peripheral surface of the base container 4. The bracket 17A is partially protruded, and the bracket 17A is partially protruded.
The plug terminal board 16 can be attached and fixed to A.

Reference numeral 19 denotes a guide bar inserted and supported in the upper center of the outlet terminal board 13, and its tip 19A is inserted and supported in the guide hole 2n bored in the upper center of the plug terminal board 16.

Reference numeral 21 denotes a relatively large-diameter outlet with an outlet of an appropriate depth formed at its tip, the base end of which is inserted into and supported by the outlet terminal board 13, and the tip of which is inserted into the outlet terminal board 13. It protrudes from the front surface of the panel 13.

Approximately 3 to 4 cores of the large-diameter outlet 21 are arranged in a horizontal row above the outlet terminal board 13.

Reference numeral 22 denotes a relatively small-diameter outlet with a socket of an appropriate depth formed at its tip, whose base end is inserted into and supported by the outlet terminal board 13, and whose tip end is inserted into and supported by the outlet terminal board 13. It protrudes from the front of the.

This small-diameter outlet 22 has about 21 cores arranged side by side in the longitudinal and lateral directions on the outlet terminal board 13 except for the upper position of the outlet terminal board 13.

23 is a relatively large-diameter plug with an insertion pin of an appropriate length protruding from its tip, and its base end is connected to the plug terminal board 1.
6 is inserted and fixed.

This large-diameter plug 23 has about 3 to 4 cores arranged in a horizontal row above the plug terminal board 16,
It can be freely inserted into the outlet 21 described above.

24 is a relatively small-diameter plug with an insertion pin of an appropriate length formed at its tip, and its base end is connected to the plug terminal board 1.
8 is inserted and fixed.

This small-diameter plug 24 has about 21 cores arranged in parallel in the vertical and horizontal directions on the board surface except for the upper position of the plug terminal board 16, and can be freely inserted into the outlet 22.

Therefore, the above-mentioned outlet terminal board 13 and plug terminal board 1
6, a substantially hermetically sealed insertion chamber R is formed.

Kt and Kt are two large and small cable lead-in fittings screwed and fixed into the mounting holes 2.3 of the insert container 1, and the cable lead-in fittings K3. Two large and small multicore cables X and Y are inserted and supported through Kt, and the small diameter multicore cable X has about 3 to 4 core cables X,,X,...
However, the other multi-core cable Y has about 21 cores Y8. Y*, Ys...Y7 are inserted through each.

Reference numeral 2S denotes a large number of connection holes recessed in the back surface of the outlet terminal board 13 in a honeycomb shape, and the base ends of the outlets 21 and 22- are individually exposed and protruded from the connection holes 25. There is.

2B is a gasket fitted into the base end of the outlet 21.22, 27 is a terminal holder thereof, and 28 is a screw for fixing the terminal holder 27, which is screwed and fixed to the base end of the outlet 21.22. .

The tips of the cables X,,X,... and the cable Yl
+ The tips of Ys, Ys...Yll are individually fitted and fixed to the terminal holder 27, and then connected to the outlet 2.
It is screwed and fixed to the base end of 1.22 in 2 days.

Therefore, in the insert container 1 on the back side of the other outlet terminal board 13, cables X, , x, ... and cables Y+
, Y warehouse...Y, the wiring room N is configured.

Ks is a cable lead-in fitting screwed and fixed into the attachment hole 5 of the side wall of the base container 4, and one multi-core cable Z is inserted and supported through the cable lead-in fitting.

Cables ZI+, Zl, Zs...2- of about 24 to 25 cores are inserted through this multicore cable Z.

Reference numeral 29 denotes a honeycomb-shaped connection hole formed on the back side of the plug terminal board 16, and the connection hole 29 has plugs 23 and 24.
The proximal end portions of each are individually exposed and protrude.

30 is a gasket inserted into the base end of the plug 23, 24;
31 is the terminal holder, and 32 is a screw for fixing the terminal holder 31, which is screwed and fixed to the base end of the plug 23, 24.

Cable 2. ．． 2. ．． 2. The distal end portions of Zl are individually fitted and fixed to the terminal holders 31, and then screwed and fixed to the base end portions of the plugs 23 and 24 with screws 32.

Therefore, in the base container 4 on the back side of the plug terminal board 16,
Cable 2. ．． 2. , ...2. A wiring room M is constructed.

Note that 33 is a U-shaped mounting frame, and 34 is a mounting band, which is wrapped around and supported on the outer peripheral surface of the base container 4, and its both ends are fixed to the mounting frame 33.

Therefore, the explosion-proof plug-in connector S of the present invention can be attached to a target device (not shown) by means of its mounting frame 33 and mounting band 34.
First, insert the inner insertion port 1A of the insert container 1 into the outer insertion port 4A of the base container 4.
At the same time, the guide bar 19 of the outlet terminal board 13 is inserted into the guide hole 2Q of the plug terminal board 16 so as to face it.

On top of that, the ring nut 8 fitted into the base container 4
When tightened, the plugs 23 and 24 of the plug terminal board 16
The electrical outlets 21 and 22 of the electrical outlet terminal board 13 are inserted into the electrical outlet terminal board 13 to bring many sets into electrical continuity at once.

On the other hand, even if you accidentally or forget to turn off the main switch of the entire device or the drive switch of the device itself when disconnecting the wires, loosen or remove the locking screw 12 of the ring nut 8. Then, loosen the ring nut 8 and perform a connection opening operation.

Then, even if a short circuit occurs when the outlet 21.22 is detached from the plug 23.24 as shown in FIG. 4, at that stage the female thread 8A of the ring nut 8' on the base container 4 side is still The threaded state is maintained and secured to the male thread 1B on the insert container 1 side with a width of about half to one-third.

Therefore, the flame generated between the outlet terminal board 13 and the plug terminal board 16 when disconnected from the plug-in connector S
(The fire will be extinguished and contained naturally.)

Of course, since the insert container 1 and the base container 4 are cast from aluminum alloy, they also exhibit pressure resistance during this type of explosion protection.

(Other Embodiments) In the embodiments described above, the outlet terminal board 13 is attached to the flange 14 protruding from the inner circumferential surface of the approximately middle portion of one of the insert containers 1.
The plug terminal board 16 is loosely fitted with an appropriate gap from the inner circumferential surface, and the plug terminal board 16 is fitted into the flange 17 protruding from the inner circumferential surface of the approximately intermediate portion of the other base container 4. They were loosely fitted with an appropriate gap from the inner peripheral surface, thereby forming a substantially sealed insertion chamber R between the outlet terminal board 13 and the plug terminal board 16.

However, as shown in FIG. 5, the outlet terminal board 13 is fitted and supported in close contact with the inner circumferential surface of the insert container 1, and the inner circumferential surface of the insert container 1 is replaced with the flange 14. A bracket 14A is partially protruded at an appropriate position between 3 and 4, and the outlet terminal board 13 is attached and fixed to the bracket 14A. In place of the flange 17, a bracket 17A is partially protruded from the inner peripheral surface of the base container 4 at about 3 to 4 appropriate positions, and a plug terminal is attached to the bracket 17A. It is also possible to attach and fix the panel 16, thereby forming an explosion-proof plug-in chamber R between the outlet terminal board 13 and the plug terminal board 16 in a substantially sealed state.

(Other Embodiments) In the above case, the outlet terminal board 13 is installed inside the insert container 1 side, and the plug terminal board 1B is installed inside the base container 4 side. , an outlet terminal board 13A is installed inside the base container 4 side,
The plug terminal board 16A may be provided inside the insert container 1 side, and the other structures may be configured in the same manner as in the previous embodiment.

(Effects of the Invention) As described above, the present invention forms the inner insertion port 1A on the inner peripheral surface of the tip of the insert container 1, and the male thread 1B on the outer peripheral surface of the tip, and An outlet terminal board 13 is provided inside, and an outer insertion port 4A is formed on the outer peripheral surface of the tip of the pressure-resistant base container 4, and a flange portion 6 is formed on the outer peripheral surface of the pressure-resistant base container 4. 4 is provided with a plug terminal board 16, and a plug 23.24 protruding from the plug terminal board 16 and an outlet 21.22 protruding from the outlet terminal board 13 are arranged so as to be freely pluggable. We have provided an explosion-proof plug-in connector in which the ring nut 8 fitted into the base container 4 can be freely screwed into the male screw 1B of the insert container 1, so that it can be easily used when inspecting and maintaining various devices. Assuming that you accidentally turn off or forget to turn off the power switch such as the main switch or drive switch, causing a short circuit when opening the connection, at that stage, the insert container 1 is connected to the ring nut 8 with respect to the base container 4. Since the screwed state is maintained through the connector, any flame that occurs between the outlet terminal board 13 and the plug terminal board 1B when disconnected will be extinguished naturally without leaking to the outside of the plug-in connector S. This contributes to various effects such as extremely superior explosion-proof performance in case of human error when installed in a place with a flammable atmosphere.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the overall assembly state of the explosion-proof plug-in connector, Figure 2 is a perspective view showing the facing surfaces of the outlet terminal board and the plug terminal board, and Figure 3 is the outlet terminal. Sectional view showing the state in which large and small outlets are attached to the panel and large and small plugs are attached to the other plug terminal board, No. 4
The figure shows the situation when disconnecting from the outlet and the plug.
The figure is a sectional view showing another embodiment. Code Table S Explosion-proof plug-in connector R plug-in chamber K Lead-in fittings x, y, z: Multi-core cable M
,N Wiring chamber 1 Insert container 1A Inner insertion port 1B Male thread 1C Side wall ID Non-threaded surface 2.3.5 Mounting hole 4 Base container 4A Outer insertion port 4B Side wall 6
,9,14.17 Flange part 70 ring 8 Ring nut 8A Female screw 10 Ring pantskin 11 Screw hole 11A Peep hole 12 Pin 13.
13A Outlet terminal board 14A, 17A Bracket 15, 16 Bolt 1B, 1fiA Plug terminal board 19 Guide bar 20 Guide hole 21.
22 Outlet 23.24 Plug 25.2
9 Wiring hole 2610 Packing 27.31 Terminal holder 28.32 Screw 33 Mounting frame 11
・■wa Ltba 'ノ ``

Claims (6)

[Claims] (1) Inner insertion port 1 on the inner peripheral surface of the tip of the insert container 1
A, a male screw 1B is formed on the outer peripheral surface of the tip thereof, an outlet terminal board 13 is installed inside the inner insertion port 1A, and an outer insertion port 4A is provided on the outer peripheral surface of the tip of the base container 4. , a flange 6 is formed on the outer peripheral surface thereof, a plug terminal board 16 is provided inside the base container 4 located inside the outer insertion port 4A, and a plug 23 protrudes from the plug terminal board 16; 24 and the receptacles 21 and 22 protruding from the receptacle terminal board 13 are arranged so as to be freely inserted, and the ring nut 8 fitted into the base container 4 is screwed into the male thread 1B of the insert container 1. , an explosion-proof plug connector characterized in that the inner plug 1A of the insert container 1 is configured to be able to freely come into sliding contact with the outer plug 4A of the base container 4. (2) The width of the female thread 8A of the ring nut 8 and the width of the male thread 1B of the insert container 1 are approximately half the width of the outer insertion port 4A of the base container 4 and the width of the inner insertion port 1B of the insert container 1. 2. The explosion-proof plug-in connector according to claim 1, wherein the explosion-proof plug-in connector is formed to a certain extent. (3) When loosening the ring nut 8 and removing the outlets 21 and 22 of the outlet terminal board 13 that have been inserted into the plugs 23 and 24 of the plug terminal board 16, the male screw 1B of the insert container 1 and the ring nut 8 are removed. Claim 1 wherein the female screw 8A is configured to maintain a screwed state with an appropriate width.
Explosion-proof plug-in connectors as described in . (4) Inner insertion port 1 on the inner peripheral surface of the tip of insert container 1
A, a male screw 1B is formed on the outer peripheral surface of the tip thereof, an outlet terminal board 13 is provided inside the inner insertion port 1A, and an outer insertion port 4A is provided on the outer peripheral surface of the tip of the pressure-resistant base container 4. A flange 6 is formed on the outer circumferential surface of the base container 4, and a plug terminal board 1 is formed in the base container 4 inside the outer insertion port 4A.
6 is installed inside the plug 2 and protrudes from the plug terminal board 16.
3 and 24 and the receptacles 21 and 22 protruding from the receptacle terminal board 13 are arranged so as to be freely pluggable, and one terminal board 1
A guide bar 19 protruding from the base container 4 can be freely inserted into a guide hole 20 penetrating the other terminal board 16.
By screwing the ring nut 8 fitted into the male thread 1B of the insert container 1, the inner insertion port 1A of the insert container 1 can freely slide into the outer insertion port 4A of the base container 4. An explosion-proof plug-in connector featuring: (5) Inner insertion port 1 on the inner peripheral surface of the tip of insert container 1
A, a male thread 1B is formed on the outer peripheral surface of the tip thereof, a plug terminal board 16A is provided inside the inner insertion port 1A, and an outer insertion port 4A is provided on the outer peripheral surface of the tip of the base container 4.
A flange 6 is formed on the outer circumferential surface of each, and an outlet terminal board 1 is formed on the base container 4 inside the outer insertion port 4A.
3A internally, and receptacles 21 and 22 protruding from the outlet terminal board 13A and plugs 23 and 24 protruding from the plug terminal board 16A are freely inserted and inserted into the base container 4. Place the ring nut 8 into the insert container 1.
By screwing into the male screw 1B of
An explosion-proof plug-in connector characterized by a structure that allows for free sliding contact. (6) Outlet terminal board 13, 13A and plug terminal board 1
6 and 16A, and the interval between the insertion chambers R is approximately the same as the width of the inner insertion port 1A of the insert container 1 and the width of the outer insertion port 4A of the base container 4. Claim 1, 2, 3, 4 or 5
Explosion-proof plug-in connectors as described in .