CN102490008B

CN102490008B - Tool for mounting chock plug on junction box

Info

Publication number: CN102490008B
Application number: CN 201110406235
Authority: CN
Inventors: 金海平
Original assignee: NINGBO KINGS INDUSTRIAL Co Ltd
Current assignee: NINGBO KINGS INDUSTRIAL Co Ltd
Priority date: 2011-12-08
Filing date: 2011-12-08
Publication date: 2013-09-25
Anticipated expiration: 2031-12-08
Also published as: CN102490008A

Abstract

The invention provides a tool for mounting a chock plug on a junction box. The tool comprises a base, a guide column, a magnetic air cylinder base, a plunger chip base and a limiting base, wherein the guide column is connected with the base, and the magnetic air cylinder base, the plunger chip base and the limiting base are connected onto the guide column; the plunger chip base is slidably connected with the guide column; a magnetic air cylinder, which is arranged on the magnetic air cylinder base and is used for driving the plunger chip base, is provided with an upper magnetic switch, a lower magnetic switch and a valve seat; a rotary mechanism capable of driving a junction box base to rotate for 90 DEG is arranged between the base and the limiting base; the junction box base is providedwith a groove and the limiting base is provided with a chock plug base; the chock plug base is provided with a chock plug holding hole and the plunger chip base is provided with a plunger chip; the base is provided with two switch buttons and the valve seat is provided with a main gas valve; the main gas valve is communicated with a first solenoid valve and a second solenoid valve, wherein the first solenoid valve is communicated with the magnetic air cylinder and the second solenoid valve is communicated with the rotary mechanism; the first solenoid valve is simultaneously and electrically connected with the two switch buttons and the lower magnetic switch; and the second solenoid valve is electrically connected with the upper magnetic switch. The tool for mounting the chock plug on the junction box has the advantages that: not only is the operation easy and simple with high efficiency, but also the operation is safe.

Description

A kind of for the frock that chock plug is installed on the terminal box

Technical field

The present invention relates to a kind of frock, particularly a kind of for the frock that chock plug is installed on the terminal box.

Background technology

Terminal box is widely used a kind of jockey in the electrical equipment, it generally comprises box body and lid, be equipped with the through hole that one or two supply lines passes on four sidewalls of box body, and in order to make terminal box can have waterproof effect to prevent that electric wire is by aqueous corrosion in the box body, present common way is a kind of plastic cement waterproof chock plug that matches with through hole on the box side wall of design, by a lamellule plastic cement waterproof chock plug is fastened on the box body one by one at full tilt then.During this terminal box use, only need to puncture and pass plastic cement waterproof chock plug with electric wire one end and get final product, because plastic cement generally all has elasticity, so can under the effect of plastic cement elastic force, be close between the breakage of plastic cement waterproof chock plug and the electric wire and formation sealing automatically.But, one by one at full tilt fasten to box body on by a lamellule in the mode of craft because plastic cement waterproof chock plug is the staff, therefore, this mounting means is not only operated the effort trouble, efficient is low, and the staff when work the lamellule accident that scratches finger also happen occasionally, have certain potential safety hazard.

Summary of the invention

The technical problem to be solved in the present invention is, provides a kind of not only operation easily simple, the efficient height, and handling safety be used for chock plug is installed to frock on the terminal box.

For solving the problems of the technologies described above, the invention provides a kind of have following structure be used for chock plug is installed to frock on the terminal box: comprise base, four guide pillars that are connected with base and be connected to magnetic cylinder block and limit base on the guide pillar from top to bottom in turn, be provided with the punch holder that can slide up and down at guide pillar between magnetic cylinder block and the limit base, the magnetic cylinder block is provided with and drives the magnetic cylinder that punch holder slides up and down at guide pillar, be provided with for the junction box seat of placing terminal box between base and the limit base and be used for driving junction box seat and revolve the rotating mechanism that turn 90 degrees around self center line at every turn, the sidewall of junction box seat is provided with the groove corresponding with the through hole on the terminal box sidewall, the limit base of junction box seat top is provided with the chock plug seat, the chock plug seat is provided with the chock plug putting hole corresponding with groove, be connected with the drift corresponding with the chock plug putting hole on the punch holder, the anterior left and right sides of base is connected with a shift knob of series connection mutually respectively, be connected with magnetic switch on the magnetic cylinder, magnetic switch and valve seat, be connected with the main air valve that communicates for source of the gas on the valve seat, connecting on the main air valve communicates be useful on is connected with the magnetic cylinder first magnetic valve that communicates with for be connected second magnetic valve that communicates with rotating mechanism, first magnetic valve is electrically connected with two shift knobs and magnetic switch simultaneously, and second magnetic valve is electrically connected with last magnetic switch.

Of the present invention a kind of for the frock that chock plug is installed on the terminal box, wherein, rotating mechanism comprises 90 degree rotary cylinder and shaft seats, shaft seat is connected with base, 90 degree rotary cylinders are installed on the shaft seat, rotating shaft one ends of 90 degree rotary cylinders are connected with rotating shaft, and rotating shaft is connected with junction box seat after passing axis hole on the shaft seat, and 90 spend rotary cylinders is connected with second magnetic valve and communicates.

Of the present invention a kind of for the frock that chock plug is installed on the terminal box, wherein, shaft seat is connected with base and refers to, be connected with slide rail on the base, the shaft seat bottom is provided with the chute that matches with slide rail, be connected with a limited block on the base of the slide rail left and right sides respectively, be connected with cylinder on the shaft seat, one end of cylinder piston rod is connected with the pole socket on being connected base, connecting on the main air valve communicates is useful on and is connected the 3rd magnetic valve that communicates with cylinder, be connected with magnetic switch on the shaft seat, be with annulus and gear on the rotating shaft, gear one end is connected with rotating shaft, and its other end is connected with annulus, be evenly equipped with four shrinkage pools that are used for installing magnetic patch on the annulus circumferential wall, described magnetic switch is electrically connected with the 3rd magnetic valve.

Of the present invention a kind of for the frock that chock plug is installed on the terminal box, wherein, magnetic cylinder block top is connected with the time relay, and the time relay is connected electrically between magnetic switch and first magnetic valve.

Of the present invention a kind of for the frock that chock plug is installed on the terminal box, wherein, the limit base top is connected with four upper limit posts and two lower limit posts, and punch holder is enclosed within on the upper limit post slidably, and the upper limit column top is connected with circular limited block.

After adopting said structure, compared with prior art, the present invention has the following advantages: well-known, on the piston of magnetic cylinder magnet ring is installed, when piston action, the last magnetic switch and the magnetic switch that are connected on the magnetic cylinder feed back the signal of telecommunication by the Magnetic Induction with magnet ring, therefore, when the staff is placed on terminal box on the junction box seat, and after being placed in the waterproof chock plug in the chock plug putting hole, just can press two shift knobs simultaneously and open first magnetic valve, this moment, the magnetic cylinder will begin air inlet, and the driving punch holder slides downwards along four guide pillars, be connected in the drift of punch holder bottom to the lower compression chock plug, and chock plug is fastened on the terminal box, when the magnetic position of the switch that the magnet ring that is positioned at magnetic cylinder piston place moves down into piston, the magnetic switch cuts out first magnetic valve, this moment, the magnetic cylinder stopped air inlet, under the effect of magnetic cylinder recoil of spring power, magnetic air cylinder driven punch holder upwards slides along four guide pillars, when last magnetic switch position that the magnet ring that is positioned at magnetic cylinder piston place moves on on piston, last magnetic switch is opened second magnetic valve, rotating mechanism control junction box seat is revolved to be turn 90 degrees, at this moment, the staff can carry out aforesaid operations again, and so quadruplication can all fasten chock plug with four sidewalls of terminal box.As from the foregoing, in whole assembling process, the staff only need place terminal box and waterproof chock plug, press two shift knobs then simultaneously and get final product, so the present invention not only operates easily simply, but also has improved operating efficiency greatly.In addition, because the present invention need not to re-use auxiliary lamellule, and the present invention is connected with a shift knob of series connection mutually respectively in the anterior left and right sides of base, in other words, the staff has only simultaneously these two shift knobs to be pressed and could start the present invention and start working, prevent that effectively because of the staff maloperation taking place causes the frock accidental activation that the situation that the staff damages is taken place, thereby improved staff's personal safety greatly.

A kind of for the frock that chock plug is installed on the terminal box in the present invention, base and shaft seat are arranged to slidably, and purpose of connecting is: have only a groove on one of them or several sidewall of junction box seat, and when this groove is positioned at the center of corresponding sidewall, namely when having only a through hole that is positioned at the sidewall center on this place's sidewall of corresponding terminal box, the staff can be according to this junction box seat sidewall in the corresponding shrinkage pool in the annulus circumferential wall, magnetic patch is installed, when this junction box seat sidewall rotates to rigging position, the corresponding magnetic patch that be positioned at annulus circumferential wall shrinkage pool this moment can rotate to the magnetic switch place, make magnetic switch open the 3rd magnetic valve, cylinder begins air inlet, because piston rod one end of cylinder is connected with the pole socket on being connected base, therefore under the reaction force of piston rod, cylinder moves and drives to pole socket and is connected shaft seat with it and slides to pole socket along slide rail, when shaft seat one end in contact when being positioned at the limited block of slide rail one side, the shaft seat stop motion, at this moment, after shaft seat moves, the groove that is positioned at junction box seat sidewall center just can be corresponding with one of them chock plug putting hole, and then finish the fitting operation of waterproof chock plug smoothly; When rotating mechanism is controlled the junction box seat rotation again, because corresponding magnetic patch leaves magnetic switch, therefore magnetic switch can cut out the 3rd magnetic valve, cylinder stops air inlet, and under the effect of cylinder recoil of spring power, shaft seat slides to pole socket in the other direction along slide rail, when the shaft seat other end touches the limited block that is positioned at the slide rail opposite side, the shaft seat stop motion also recovers initial position, when junction box seat is finished 90 degree rotations, annulus also will revolve and turn 90 degrees and another shrinkage pool can be gone to the magnetic switch place, at this moment, if in the shrinkage pool magnetic patch is arranged also, namely represent groove on the corresponding sidewall of junction box seat at this moment and be similarly one and be positioned at this sidewall center, then magnetic switch is opened the 3rd magnetic valve again, and shaft seat repeats above-mentioned action; If do not have magnetic patch in the shrinkage pool, the groove that namely represent on the corresponding sidewall of junction box seat this moment is conventional two, and then the 3rd magnetic valve keeps closed condition, and shaft seat keeps initial position, and the groove on the assurance junction box seat sidewall is corresponding with the chock plug putting hole.As from the foregoing, base and shaft seat be made as slidably to be connected make that the present invention is a kind of not only can to assemble the terminal box sidewall that is provided with two holes for the frock that chock plug is installed on the terminal box, and can also the terminal box sidewall that only is provided with a hole be assembled, thereby it is a kind of for the range of application that chock plug is installed to the frock on the terminal box to have enlarged the present invention greatly.

The present invention is a kind of for chock plug being installed to frock on the terminal box at magnetic cylinder block top connect hours relay, and the effect that the time relay is connected electrically between magnetic cylinder mechanism and first magnetic valve is: we know, the waterproof chock plug is by the mode of pressing, make the generation deformation of waterproof chock plug and fasten to terminal box sidewall through hole, yet deformation and deformation all need to recover certain hour, therefore, under the situation of not free relay, when the magnetic position of the switch that the magnet ring that is positioned at magnetic cylinder piston place moves down into piston, the magnetic switch will cut out first magnetic valve at once, this moment, the magnetic cylinder can stop air inlet at once, and under the effect of magnetic cylinder recoil of spring power, magnetic air cylinder driven punch holder is upwards slided along four guide pillars, therefore, it is very short that drift is pressed the time of waterproof chock plug, thereby cause the waterproof chock plug can not fasten to terminal box sidewall through hole fully recovery time because having enough deformation time and deformation easily, and then cause the assembling failure; And under the situation of free relay, free relay can be electrically connected with the magnetic switch, when the magnetic position of the switch that the magnet ring that is positioned at magnetic cylinder piston place moves down into piston, the magnetic switch open time relay, the time relay can postpone to make the magnetic switch close first magnetic valve again behind the certain hour, thereby can make drift keep pressing waterproof chock plug certain hour, guarantee the waterproof chock plug can have enough deformation time and deformation recovery time and fasten to terminal box sidewall through hole fully, and then improved assembly yield greatly.

The present invention is a kind of for chock plug being installed to frock on the terminal box is connected with four upper limit posts and two lower limit posts at the limit base top purpose to be: when the work of magnetic cylinder mechanism is undesired, under the acting in conjunction of circular limited block, the upper limit post can limit punch holder on the journey of dividing a word with a hyphen at the end of a line, thereby can prevent effectively that punch holder from making its and magnetic cylinder block that mutual case of collision generation take place because moving on undue; In like manner, the lower limit post can limit the stroke that moves down of punch holder, thereby the drift that can effectively prevent from being connected on the punch holder causes product rejection because too moving down excessive compression waterproof chock plug, terminal box and junction box seat, even causes a kind of situation about damaging for the frock that chock plug is installed on the terminal box of the present invention to take place.

Description of drawings

Fig. 1 is that the present invention is a kind of for the front side perspective view that chock plug is installed to the frock on the terminal box;

Fig. 2 is that the present invention is a kind of for the right lateral side perspective view that chock plug is installed to the frock on the terminal box;

To be that the present invention is a kind of analyse and observe the structure for amplifying schematic diagram for chock plug being installed to frock rotating mechanism, annulus, gear and junction box seat on the terminal box when interconnecting to Fig. 3;

Fig. 4 is that the present invention is a kind of for the three-dimensional structure for amplifying schematic diagram that chock plug is installed to the frock annulus on the terminal box.

The specific embodiment

Be described in further detail for the frock that chock plug is installed on the terminal box the present invention is a kind of below in conjunction with the drawings and specific embodiments.

As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, in this specific embodiment, the present invention is a kind of to comprise base 1 for the frock that chock plug is installed on the terminal box, rotating mechanism, four guide pillars 2 that are connected with base 1 and be connected to magnetic cylinder block 3 and limit base 5 on the guide pillar from top to bottom in turn, be provided with the punch holder 4 that can slide up and down at guide pillar 2 between magnetic cylinder block 3 and the limit base 5, be provided with guide pin bushing 14 between punch holder 4 and the guide pillar 2, be connected with four upper limit posts 38 and two lower limit posts 39 on the limit base 5, upper limit post 38 tops are connected with circular limited block 40, magnetic cylinder block 3 is provided with magnetic cylinder 15, be connected with magnetic switch 19 on the magnetic cylinder 15, magnetic switch 20 magnetic cylinders 15 and valve seat 42, the piston rod of magnetic cylinder 15 passes magnetic cylinder block 3 and is connected with punch holder 4, rotating mechanism comprises 90 degree rotary cylinder 8 and shaft seats 6, be connected with T type slide rail 21 on the base 1, shaft seat 6 bottoms are provided with the T type chute 22 that matches with T type slide rail 21, in other words, shaft seat 6 is connected on the T type slide rail 21 slidably by the T type chute 22 of its bottom, the base 1 anterior left and right sides is connected with a mutual tandem tap button 7 respectively, be connected with a limited block 23 respectively on the base 1 of T type slide rail 21 left and right sides, 90 degree rotary cylinders 8 are installed on the shaft seat 6, be provided with between base 1 and the limit base 5 for the junction box seat 9 of placing terminal box, rotating shaft 44 1 ends of 90 degree rotary cylinders 8 are connected with rotating shaft 31, be with annulus 28 and gear 45 on the rotating shaft 44, gear 45 1 ends are connected with rotating shaft 31, its other end is connected with annulus 28 by screw 46, be evenly equipped with four shrinkage pools 30 that are used for installation and magnetic patch 29 on annulus 28 circumferential wall, rotating shaft 31 is installed on the axis hole 43 of shaft seat 6 by two bearings 47, rotating shaft 31 other ends are provided with screwed hole 34, also be connected with a stop pin 36 in the rotating shaft 31 of this end, be equipped with one or two on four sidewalls of junction box seat 9 and be used for the groove 10 corresponding with the through hole on the corresponding sidewall of terminal box, junction box seat 9 front central places are provided with the bolt hole 32 that matches with screwed hole 34, its center, rear portion is provided with the axocoel 33 that matches with rotating shaft 31, bolt hole 32 communicates with axocoel 33, junction box seat 9 is connected with rotating shaft 31 by axocoel 33, bolt 35 1 ends pass screwed hole 34 places that bolt hole 32 is connected rotating shaft 31, the inwall of axocoel 33 is provided with the locating slot 41 that matches with stop pin 36, shaft seat 6 one ends are connected with cylinder 24, piston rod one end of cylinder 24 is connected with the pole socket 25 on being connected base 1, be connected with the magnetic switch 27 that matches with magnetic patch 29 on the shaft seat 6, the limit base 5 of junction box seat 9 tops is provided with chock plug seat 11, chock plug seat 11 is provided with two chock plug putting holes 12 corresponding with groove 10, be connected with two drifts 13 corresponding with chock plug putting hole 12 on the punch holder 4, be connected with the main air valve 16 that communicates for being connected with source of the gas on the valve seat 42, connecting on the main air valve 16 communicates is useful on and is connected first magnetic valve 17 that communicates with magnetic cylinder 15, be used for being connected with 90 degree rotary cylinders 8 second magnetic valve 18 that communicates and for be connected the 3rd magnetic valve 26 that communicates with cylinder 24, be connected with the time relay 37 on the magnetic cylinder block 3, two shift knobs 7 are electrically connected with first magnetic valve 17, the time relay 37 is connected electrically between magnetic switch 20 and first magnetic valve 17, second magnetic valve 18 is electrically connected with last magnetic switch 19, and magnetic switch 27 is electrically connected with the 3rd magnetic valve 26.

The present invention is a kind of for the operation principle that chock plug is installed to the frock on the terminal box to be: place magnetic patch 29 according to groove 10 types on 9 four sidewalls of junction box seat earlier, the principle of placing magnetic patch 29 is: if the groove 10 on junction box seat 9 sidewalls is one and is positioned at this sidewall center, then in the shrinkage pool 30 of annulus 28 correspondences, place magnetic patch 29, if the groove 10 on junction box seat 9 sidewalls is two side by side, then in the shrinkage pool 30 of annulus 28 correspondences, do not place magnetic patch 29, after magnetic patch 29 is placed and is finished, power-on and main air valve 16 is connected with source of the gas communicates, terminal box is buckled on the junction box seat 9 then, and two waterproof chock plugs are placed in respectively in two chock plug putting holes 12, then press two shift knobs 7 simultaneously and open first magnetic valve 17, the beginning air inlet of magnetic cylinder 15 at this moment, its piston rod drives punch holder 4 and slides downwards along four guide pillars 2, be connected in drift 13 on the punch holder 4 to lower compression waterproof chock plug, the waterproof chock plug is pressed to the through hole of terminal box sidewall, when magnetic switch 20 positions that the magnet ring that is positioned at magnetic cylinder 15 piston places moves down into piston, 20 opening time of magnetic switch relay 37, the time relay 37 postpones certain hour can be fastened on the sidewall through hole of terminal box fully to guarantee the waterproof chock plug, after finishing time delay, magnetic switch 20 cuts out first magnetic valve 17, magnetic cylinder 15 stops air inlet, and under the effect of portion's recoil of spring power within it, making piston rod drive punch holder 4 upwards slides along four guide pillars 2, when the magnet ring that is positioned at magnetic cylinder 15 piston places moves on to magnetic switch 19 positions on piston, last magnetic switch 19 is opened second magnetic valve 18, spend rotary cylinder 8 air inlets and by rotating shaft 44 rotating shaft 31 is revolved this moment 90 and turn 90 degrees, under the drive of rotating shaft 31, junction box seat 9 and gear 45 also revolve and turn 90 degrees, gear 45 drives annulus 28 again and revolves and turn 90 degrees, at this moment, if be placed with magnetic patch 29 in the corresponding shrinkage pool 30 on annulus 28 circumferential wall, then magnetic switch 27 is opened the 3rd magnetic valve 26, cylinder 24 beginning air inlets, because piston rod one end of cylinder 24 is connected with the pole socket 25 on being connected base 1, therefore under the reaction force of piston rod, cylinder 24 is to pole socket 25 1 side shiftings and drive and to be connected shaft seat 6 with it and to slide along T type slide rail 21 to pole socket 25 1 sides, when shaft seat 6 one end in contact when being positioned at the limited block 23 of T type slide rail 21 1 sides, shaft seat 6 stop motions, whole frock break-off; If do not place magnetic patch 29 in the corresponding shrinkage pool 30 on annulus 28 circumferential wall, then the 3rd magnetic valve 26 keeps closed condition, cylinder 24 is not worked, shaft seat 6 keeps initial position motionless, also break-off of whole frock break-off, at this moment, the staff can carry out aforesaid operations again, so quadruplication can all fasten chock plug with four sidewalls of terminal box, and assembling is finished.

The present invention is a kind of to be existing routine techniques for the magnetic cylinder 15 that chock plug is installed to the frock on the terminal box, 90 degree rotary cylinders 8, cylinder 24 and time relay 37, so do not give unnecessary details at this.

Above-described embodiment is described preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.

Claims

1. one kind is used for chock plug is installed to frock on the terminal box, it is characterized in that: comprise base (1), four guide pillars (2) that are connected with base (1) and be connected to magnetic cylinder block (3) and limit base (5) on the guide pillar (2) from top to bottom in turn, be provided with the punch holder (4) that can slide up and down in guide pillar (2) between described magnetic cylinder block (3) and the limit base (5), described magnetic cylinder block (3) is provided with and drives the magnetic cylinder (15) that punch holder (4) slides up and down at guide pillar (2), be provided with for the junction box seat (9) of placing terminal box between described base (1) and the limit base (5) and be used for driving the rotating mechanism that junction box seat (9) is rotated around self center line, the sidewall of described junction box seat (9) is provided with the groove (10) corresponding with the through hole on the terminal box sidewall, the limit base (5) of described junction box seat (9) top is provided with chock plug seat (11), described chock plug seat (11) is provided with the chock plug putting hole (12) corresponding with groove (10), be connected with the drift (13) corresponding with chock plug putting hole (12) on the described punch holder (4), the anterior left and right sides of described base (1) is connected with a shift knob (7) of series connection mutually respectively, be connected with magnetic switch (19) on the described magnetic cylinder (15), magnetic switch (20) and valve seat (42), be connected with on the described valve seat (42) for the main air valve that communicates with source of the gas (16), described main air valve (16) go up to connect communicate be useful on is connected with magnetic cylinder (15) first magnetic valve (17) that communicates with for be connected second magnetic valve (18) that communicates with rotating mechanism, described first magnetic valve (17) is electrically connected with two shift knobs (7) and magnetic switch (20) simultaneously, and described second magnetic valve (18) is electrically connected with last magnetic switch (19).

2. according to claim 1 a kind of for the frock that chock plug is installed on the terminal box, it is characterized in that: described rotating mechanism comprises 90 degree rotary cylinder (8) and shaft seats (6), described shaft seat (6) is connected with base (1), described 90 degree rotary cylinders (8) are installed on the shaft seat (6), rotating shaft (44) one ends of described 90 degree rotary cylinders (8) are connected with rotating shaft (31), axis hole (43) back that described rotating shaft (31) is passed on the shaft seat (6) is connected with junction box seat (9), and described 90 spend rotary cylinders (8) is connected with second magnetic valve (18) and communicates.

3. according to claim 2 a kind of for the frock that chock plug is installed on the terminal box, it is characterized in that: described shaft seat (6) is connected with base (1) and refers to, be connected with slide rail (21) on the described base (1), described shaft seat (6) bottom is provided with the chute (22) that matches with slide rail (21), be connected with a limited block (23) respectively on the base (1) of described slide rail (21) left and right sides, be connected with cylinder (24) on the described shaft seat (6), one end of described cylinder (24) piston rod is connected with pole socket (25) on being connected base (1), described main air valve (16) go up to connect to communicate to be useful on and is connected the 3rd magnetic valve (26) that communicates with cylinder (24), be connected with magnetic switch (27) on the described shaft seat (6), be with annulus (28) and gear (45) on the described rotating shaft (44), described gear (45) one ends are connected with rotating shaft (31), its other end is connected with annulus (28), be evenly equipped with four shrinkage pools (30) that are used for installing magnetic patch (29) on described annulus (28) circumferential wall, described magnetic switch (27) is electrically connected with the 3rd magnetic valve (26).

4. according to claim 1 or 2 or 3 described a kind of for the frock that chock plug is installed on the terminal box, it is characterized in that: be connected with the time relay (37) on the described magnetic cylinder block (3), the described time relay (37) is connected electrically between magnetic switch (20) and first magnetic valve (17).

5. according to claim 1 or 2 or 3 described a kind of for the frock that chock plug is installed on the terminal box, it is characterized in that: described limit base (5) top is connected with four upper limit posts (38) and two lower limit posts (39), described punch holder (4) is enclosed within on the upper limit post (38) slidably, and described upper limit post (38) top is connected with circular limited block (40).