CN212462579U - Locking device - Google Patents

Abstract

The utility model discloses a blocking device for to a well door shutting of the circuit breaker room of a medium voltage distribution cabinet, blocking device includes: the crank arm is arranged on a middle partition plate of the breaker chamber and is movably connected with the middle partition plate; the reset spring is arranged on a middle door of the breaker chamber and is connected to the crank arm through a pull rope; the connecting rod mechanism comprises a transmission plate, a locking rod and an additional rod which are sequentially connected end to end; one end of the transmission plate is movably connected to the reset spring, the other end of the transmission plate is movably connected with one end of the lock rod, and the other end of the lock rod is detachably connected with the additional rod; when the middle door is closed, the additional rod is arranged opposite to a through hole formed in the middle door and is used for being matched with the through hole; the latching device closes the center door when a circuit breaker trolley in the circuit breaker chamber is pushed over the center screen toward the operating position.

Description

Locking device

Technical Field

The utility model relates to an electrician, electrical apparatus equip the field, especially relate to a be used for medium voltage switch board blocking device.

Background

In order to ensure the safety of equipment and operators, a variety of mechanical locking devices are provided in a conventional medium voltage distribution cabinet (also called a center cabinet), wherein fig. 1 is a schematic diagram of a locking device for a medium voltage distribution cabinet in the prior art. As shown in fig. 1, in order to prevent the existing middle door 20 from being opened at the working position by the existing middle-set-type existing circuit breaker handcart 10, which causes an electric shock accident to a person, the existing mechanical link mechanism is used as a transmission device on the existing valve mechanism 40 of the existing circuit breaker chamber 30, that is, the existing mechanical link mechanism is a link 50, the link 50 is used as a locking mechanism of the locking device, that is, a locking rod, the existing circuit breaker handcart 10 has an existing pushing shaft 70, the existing circuit breaker handcart 10 is pushed along the existing pushing shaft 70 to drive the existing valve mechanism 40, and then the link 50 is transmitted to extend the link 50, so as to block the door lock 201 of the existing middle door 20, or to unlock the existing middle door 20 when the link 50 is retracted, so that when the existing circuit breaker handcart 10 is pushed to the working position and may be electrified, the conventional middle door 20 is not opened due to misoperation, thereby preventing the occurrence of electric shock accidents of personnel and realizing the function of preventing the high-voltage distribution equipment from locking in a five-prevention mode and preventing the high-voltage distribution equipment from entering into the live interval by mistake.

Referring to fig. 1, the existing mechanical link mechanism of the existing centrally installed switchgear for locking the existing middle door 20 is driven by the existing valve mechanism 40 disposed on the single side of the right side of the existing breaker chamber 30, and the existing valve mechanism 40 of the existing breaker chamber 30 mainly functions to open and close a valve (the open state of the existing middle door 20) for shielding a static contact, and in order to flexibly open and close the valve, the existing push plates 60 on the left and right sides of the existing breaker handcart 10 need to be used to push the existing valve mechanisms 40 on the two sides of the existing middle door 20 to perform transmission in a balanced manner, so that the valve keeps horizontal rising and falling; on this basis, the connecting rod 50 attached to the existing valve mechanism 40 on one side of the existing middle door 20 for locking the existing middle door 20 will additionally increase the resistance of the existing valve mechanism 40 on one side, and the resistance is conducted to the existing circuit breaker handcart 10, so that the resistance on two sides of the existing circuit breaker handcart 10 is unbalanced: the additional mechanism is that one side of the connecting rod 50 is large, the other side is small, the existing circuit breaker handcart 10 can be inclined, and then the valve is not horizontal in the ascending and descending processes, so that the existing valve mechanism 40 is blocked, the existing circuit breaker handcart 10 is blocked in the propelling process, and a blocking mechanism, such as the existing mechanical connecting rod mechanism, fails, and equipment electrical accidents and personal safety accidents are caused in serious cases.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locking device, a well door of a circuit breaker room for to a medium voltage switch board is locked, it uses the connecting lever through cable and reset spring and link mechanism cooperation, link mechanism includes driving plate, locking lever and the additional rod that connects gradually, utilize the detachable connection of additional rod and locking lever, and the additional rod cooperatees with the through-hole of seting up on the well door, when utilizing the indoor circuit breaker handcart of circuit breaker to impel to the operating position on the median septum, the connecting lever is pressed by the circuit breaker handcart and is shifted, the connecting lever stretches out outside the well door through the additional rod of cable and reset spring drive locking lever, block the indoor valve mechanism of circuit breaker, realize the function of locking the well door; meanwhile, the knob of the additional rod is made to fall off from the outside of the middle door through the through hole, and the unlocking function under emergency is realized.

In order to achieve the purpose, the utility model adopts the following technical scheme.

A blocking device for blocking a middle door of a circuit breaker compartment of a medium voltage distribution cabinet, said blocking device comprising: the crank arm is arranged on a middle partition plate of the breaker chamber and is movably connected with the middle partition plate; the reset spring is arranged on the middle door of the breaker chamber and is connected to the crank arm through a pull rope; the connecting rod mechanism comprises a transmission plate, a locking rod and an additional rod which are sequentially connected end to end; one end of the transmission plate, which is far away from the lock rod, is connected to the return spring; when the middle door of the breaker chamber is closed, the additional rod is arranged opposite to a through hole formed in the middle door and is used for being matched with the through hole; when a breaker handcart in the breaker chamber pushes the middle partition plate to the working position, the locking device closes the middle door.

Furthermore, the lock rod is detachably connected with the additional rod.

Further, the locking rod and the additional rod are in threaded fit, wherein a threaded hole is formed in the end portion of the locking rod at the threaded fit position, the threaded hole extends along the length direction of the locking rod, an external thread surface is arranged on the outer peripheral surface of the end portion of the additional rod, and the threaded hole of the locking rod is matched with the external thread surface of the additional rod.

Furthermore, one end of the crank arm is movably connected with the middle partition plate through a first rotating shaft, the crank arm is connected with the first rotating shaft in a pin shaft mode, and the first rotating shaft is fixedly installed on the middle partition plate.

Further, the circuit breaker handcart is in when advancing to operating position on the median septum, the connecting lever be used for by the circuit breaker handcart is pressed and is shifted, and the connecting lever passes through the cable reaches the reset spring drive the locking lever the additional rod stretches out the circuit breaker room outside the through-hole, the additional rod is used for blocking an indoor valve mechanism of circuit breaker, in order to block the circuit breaker room the well door.

Furthermore, the one end that the turning arm deviates from first pivot sets up a gyro wheel, the gyro wheel with the turning arm deviates from the fixed connection of first pivot, the turning arm is around self axle center rotation.

Further, the both ends of cable respectively with the connecting lever reaches reset spring can dismantle the connection, wherein, the both ends peripheral surface of cable is provided with the overcoat mounting, the overcoat mounting be used for with the cable install in the connecting lever reaches on the reset spring.

Furthermore, the transmission plate is movably connected with the return spring in a pin shaft connection mode; and the transmission plate is movably connected with the lock rod in a pin shaft connection mode.

Further, be provided with a second pivot on the driving plate, the driving plate with carry out a swing joint between the second pivot, the second pivot fixed set up in on a lateral wall of circuit breaker room.

Further, the locking device further comprises a disassembling tool, and the disassembling tool is used for operating the additional rod at the through hole, so that the additional rod falls off to forcibly release the locking of the middle door.

The utility model discloses closing device's beneficial effect is:

(1) the utility model discloses do not make the circuit breaker handcart produce the incline because of the both sides atress inequality, has avoidd from this a series of problems such as circuit breaker handcart propulsion stagnation, blocking device stagnation that leads to because of the circuit breaker handcart incline, and more because additional rod has been installed on the locking lever, additional rod and locking lever are for dismantling being connected, have realized the unblock under the outer emergency of medium voltage switch board, have perfected blocking device's function.

(2) Use the utility model discloses behind the locking device, the medium voltage distribution cabinet will reduce the condition that the locking device jamming appears, increased the function of door in the unblock under the emergency, reduced from this because of the maintenance that mechanical failure arouses has a power failure and the economic loss who brings from this to and the equipment trouble that the blocked mechanical system became invalid enlarges and bodily injury loss, improved the maneuverability of medium voltage distribution cabinet, also improved whole distribution system's security.

Drawings

Fig. 1 is a schematic view of a prior art blocking device for a medium voltage distribution cabinet.

Fig. 2 is a schematic diagram of the position of the locking device installed in the medium voltage distribution cabinet according to an embodiment of the present invention.

Fig. 3 is a schematic illustration of the position of the embodiment of the locking device according to fig. 2 from another point of view when installed in a medium voltage switchgear.

Fig. 4 is a schematic structural diagram of the locking device according to the embodiment of the present invention.

Fig. 5a and 5b are schematic views of the locking device of the present invention.

The reference numerals in the figures are respectively:

10. an existing circuit breaker handcart; 20. An existing middle door;

30. an existing circuit breaker chamber; 40. Existing valve mechanisms;

50. a connecting rod; 60. The existing push plate;

70. an existing propeller shaft; 201. A door lock;

100. a medium voltage distribution cabinet; 101. A circuit breaker chamber;

102. a middle door; 103. A middle partition plate;

104. a side wall; 105. A circuit breaker handcart;

1051. a propeller shaft; 1052. Pushing the plate;

106. a door opening mechanism; 107. A through hole;

108. a middle door lock; 1. A crank arm;

2. a cable; 3. A return spring;

4. a link mechanism; 5. A drive plate;

6. a lock lever; 7. An additional rod;

8. a first rotating shaft; 9. A roller;

10. a second rotating shaft; 21. And (4) a jacket fixing piece.

Detailed Description

The present invention will be described in more detail with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.

Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic diagram illustrating a position of a locking device installed in a medium voltage distribution cabinet according to an embodiment of the present invention; fig. 3 is a schematic illustration of the position of the embodiment of the locking device according to fig. 2 from another perspective when installed in a medium voltage distribution cabinet; fig. 4 is a schematic structural diagram of the locking device according to the embodiment of the present invention. The utility model discloses a blocking device for blocking to the circuit breaker room 101 of a medium voltage distribution cabinet 100, circuit breaker room 101 includes a well door 102, a median septum 103, a plurality of lateral walls 104, and sets up in the circuit breaker handcart 105 of the inside of circuit breaker room 101, well door 102, median septum 103 and a plurality of lateral walls 104 enclose and establish into circuit breaker room 101, be provided with mechanism 106 of opening a door on the lateral wall 104 of circuit breaker room 101, mechanism 106 of opening a door is used for unblanking for well door 102; the locking device comprises a crank arm 1, a pull cable 2, a return spring 3 and a connecting rod mechanism 4, wherein the connecting rod mechanism 4 comprises a transmission plate 5, a locking rod 6 and an additional rod 7.

Please continue to fig. 3 and fig. 4. As shown in fig. 3, the crank arm 1 is movably connected to the middle partition 103 of the breaker chamber 101, as shown in fig. 4, one end of the crank arm 1 is connected to the middle partition 103 through a first rotating shaft 8, the crank arm 1 is preferably movably connected to the first rotating shaft 8 through a shaft pin, the first rotating shaft 8 is disposed below the middle partition 103, the first rotating shaft 8 is fixedly connected to the middle partition 103, and the crank arm 1 moves in a circle center relative to the first rotating shaft 8; the other end of the crank arm 1 is provided with a roller 9, the roller 9 is fixedly connected with the crank arm 1, and the roller 9 rotates around itself.

As shown in fig. 3, the crank arm 1 is disposed on a center line of the middle partition plate 103, the middle partition plate 103 and a pushing shaft 1051 of the circuit breaker handcart 105 are in the same direction, the circuit breaker handcart 105 is symmetrical about the center line of the middle partition plate 103, and symmetrical pushing plates 1052 are disposed on two sides of the circuit breaker handcart 105. As shown in fig. 4, when the circuit breaker handcart 105 is pushed to the working position on the intermediate partition plate 103, the crank arm 1 is used for being pressed by the circuit breaker handcart 105 to displace, and the thrust and the self weight of the circuit breaker handcart 105 uniformly push down the crank arm 1 and the roller 9 on the crank arm 1, the crank arm 1 displaces relative to the intermediate partition plate 103 around the first rotating shaft 8 after being pressed, wherein an accommodating groove (not shown) is arranged on the intermediate partition plate 103, and the crank arm 1 moves in the accommodating groove of the intermediate partition plate 103.

Referring to fig. 3 and 4, the crank arm 1 is connected to the return spring 3 through the cable 2, specifically, one end of the cable 2 is mounted on a wall of the crank arm 1, the other end of the cable 2 is connected to one end of the return spring 3, two ends of the cable 2 are detachably connected to the crank arm 1 and the return spring 3, and the other end of the return spring 3 is fixed to the side wall 104 of the circuit breaker chamber 101. Wherein, the peripheral surface at the both ends of cable 2 is equipped with overcoat mounting 21 respectively, overcoat mounting 21 for cable 2 is slidable, overcoat mounting 21 be used for with the both ends of cable 2 fixed mounting respectively in crank arm 1 with on reset spring 3, for example overcoat mounting 21 will through threaded connection respectively the both ends of cable 2 are fixed respectively extremely crank arm 1 with on reset spring 3. In addition, the cable 2 is a core pulling cable.

Continuing to see fig. 4, link mechanism 4 includes one of end to end connection in proper order drive plate 5, one locking lever 6, and one additional rod 7, wherein, drive plate 5's one end swing joint in reset spring 3 is last, the swing joint mode is preferably round pin axle swing joint, drive plate 5's the other end with locking lever 6's one end swing joint, the connection mode is preferably round pin axle swing joint. And, be provided with a second pivot 10 on the driving plate 5, the one end of second pivot 10 with driving plate 5 carries out a swing joint, the other end of second pivot 10 install in on the circuit breaker room 101, preferred embodiment does, second pivot 10 with circuit breaker room 101 lateral wall 104 fixed connection, driving plate 5 for second pivot 10 is free rotation.

Continuing to fig. 4, the end of the lock lever 6 facing away from the transmission plate 5 is detachably connected to the end of the attachment lever 7. As a preferred embodiment, the connection mode of the lock rod 6 and the accessory rod 7 is preferably a screw-fit mode, at the screw-fit position, a threaded hole is arranged at the end part of the lock rod 6, an external thread surface is arranged on the outer circumferential surface of the end part of the accessory rod 7, and the connection between the threaded hole of the lock rod 6 and the external thread surface of the accessory rod 7 is a screw-fit detachable connection; the length extension direction of the lock lever 6 is the same as the length extension direction of the accessory lever 7, and the length extension directions of the lock lever 6 and the accessory lever 7 are the same as the direction of the center line of the middle partition plate 103. And the screw hole of the locking bar 6 extends along the length direction of the locking bar 6.

Referring to fig. 2 and 3, when the middle door 102 of the breaker chamber 101 is closed, the additional rod 7 is disposed opposite to a through hole 107 formed in the middle door 102, and the additional rod 7 is retractable in the through hole 107.

In the embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 4, the driving force of the locking device is derived from the crank arm 1, the crank arm 1 is pushed by the circuit breaker handcart 105, i.e. the weight of the circuit breaker handcart 105 itself is utilized to push and press the roller 9 of the crank arm 1, and then the crank arm 1 is pushed, the crank arm 1 is linked with the link mechanism 4 to complete the locking of the middle door 102, specifically, when the circuit breaker handcart 105 is pushed to the working position on the middle partition plate 103, the crank arm 1 is used for being pressed by the circuit breaker handcart 105 to shift, and the crank arm 1 drives the lock rod 6 through the cable 2 and the reset spring 3, the additional rod 7 of the lock rod 6 extends out of the circuit breaker chamber 101 of the medium voltage power distribution cabinet 100, the valve mechanism 106 in the circuit breaker chamber 101 blocks, to block the middle door 102 of the breaker chamber 101. In this embodiment, the lock lever 6 serves as a locking mechanism of the locking device.

It is worth mentioning that connecting lever 1 links 4 completion interlocks of link mechanism the process of well door 102, because connecting lever 1 install in on the central line of circuit breaker handcart 105, the thrust of circuit breaker handcart 105 and dead weight will evenly push down connecting lever 1 reaches connecting lever 1 gyro wheel 9 can make circuit breaker handcart 105 can not produce the skew because of both sides atress is uneven, has avoided from this because of circuit breaker handcart 105 takes place the skew and leads to circuit breaker handcart 105 impels the jamming blocked mechanism 4 a series of problems such as jamming.

Furthermore, the locking device comprises a removal tool (not shown) for operating the additional lever 7 at the through hole 107. In this embodiment, the additional rod 7 serves as a forced unlocking mechanism of the locking device, and the through hole 107 of the middle door 102 is an unlocking hole.

Continuing to refer to fig. 3 and 4, under the condition that circuit breaker handcart 105 can not withdraw from or blocking mechanism is invalid, through the through-hole 107 that reserves on well door 102, use the extracting tool rotates annex pole 7 on the locking lever 6 for annex pole 7 drops, does not need under the condition that locking lever 6 resets, forces to relieve the shutting of well door 102, because annex pole 7 for locking lever 6 can be dismantled, realized the unblock under the outside emergency of medium voltage distribution cabinet 100.

Referring to fig. 5a and 5b, fig. 5a and 5b are schematic views of the locking device of the present invention. The utility model discloses locking device's application method does:

as shown in fig. 5a and 4, when the circuit breaker handcart 105 is not pushed forward, the crank arm 1 and the roller 9 of the crank arm 1 face upward relative to the middle partition plate 103, the lock rod 6 does not extend, the middle door lock 108 is not limited, and the middle door 102 can be freely opened.

As shown in fig. 5b, 4 and 3, when the circuit breaker trolley 105 is advanced to the operating position, the circuit breaker handcart 105 advances along the central line of the middle partition plate 103, the crank arm 1 and the roller 9 on the middle partition plate 103 are pressed down by the circuit breaker handcart 105, the crank arm 1 is pressed and displaced, simultaneously, the crank arm 1 pulls the pulling cable 2, the pulling cable 2 stretches the return spring 3 installed on the side wall 104 of the breaker chamber 101, the return spring 3 pulls the lock lever 6 through the driving plate 5, so that the additional lever 7 of the lock lever 6 is protruded toward the outside of the middle door 102, i.e. the cabinet of the medium voltage distribution cabinet 100, so as to block the door opening mechanism 106 of the circuit breaker chamber 101, the door lock of the middle door 102 is limited, so that the middle door 102 cannot be unlocked, and the function of locking the middle door 102 is realized.

The locking device of the utility model is characterized in that the crank arm 1 is arranged on the central line of the middle partition plate 103 in the circuit breaker chamber 101, the crank arm 1 is pushed and pressed by the self weight of the circuit breaker handcart 105, the crank arm 1 is linked with the link mechanism 4 through the inhaul cable 2 and the reset spring 3, the link mechanism comprises a lock rod 6 and an additional rod 7, and the additional rod 7 is detachably connected with the lock rod 6; the locking rod 6 serves as a locking mechanism of the locking device, the additional rod 7 serves as a forced unlocking mechanism of the locking device, the purpose of locking the middle door 102 of the circuit breaker chamber 101 is achieved, meanwhile, unlocking under the emergency condition outside the medium-voltage power distribution cabinet 100 is achieved, and the function of the locking device is improved. Use behind the locking device, medium voltage distribution cabinet 100 will reduce the condition that the locking device jamming appears, has increased the function of door in the unblock under the emergency, has reduced the maintenance that arouses because of mechanical failure from this and has had a power failure and the economic loss who brings from this to and equipment trouble that locking mechanism became invalid and leads to enlarges and the bodily injury loss, has improved medium voltage distribution cabinet's maneuverability, has also improved whole distribution system's security.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A blocking device for blocking a middle door of a circuit breaker compartment of a medium voltage distribution cabinet, characterized in that it comprises:

the crank arm is arranged on a middle partition plate of the breaker chamber and is movably connected with the middle partition plate;

the reset spring is arranged on the middle door of the breaker chamber and is connected to the crank arm through a pull rope;

the connecting rod mechanism comprises a transmission plate, a locking rod and an additional rod which are sequentially connected end to end; wherein the content of the first and second substances,

one end of the transmission plate, which is far away from the lock rod, is connected to the return spring; and the number of the first and second electrodes,

when the middle door of the breaker chamber is closed, the additional rod is arranged opposite to a through hole formed in the middle door and is used for being matched with the through hole;

when a breaker handcart in the breaker chamber pushes the middle partition plate to the working position, the locking device closes the middle door.

2. The lockout device of claim 1, wherein the locking bar is removably connected to the accessory bar.

3. The locking device according to claim 2, wherein the locking rod is screw-engaged with the additional rod, wherein a screw hole is provided at an end portion of the locking rod at the screw-engagement portion, the screw hole extending in a length direction of the locking rod, an outer circumferential surface of an end portion of the additional rod is provided with an outer thread surface, and the screw hole of the locking rod is engaged with the outer thread surface of the additional rod.

4. The locking device of claim 3, wherein one end of the crank arm is movably connected to the middle partition plate by a first rotating shaft, the crank arm is movably connected to the first rotating shaft by a pin, and the first rotating shaft is fixedly mounted on the middle partition plate.

5. The locking device according to claim 4, wherein the circuit breaker handcart is in when advancing to the operating position on the median septum, the connecting lever is used for by the circuit breaker handcart is pressed and is shifted, and the connecting lever passes through the cable and the reset spring drive the additional rod of locking lever stretches out outside the through-hole of circuit breaker room, the additional rod is used for blocking a valve mechanism in the circuit breaker room, in order to block the circuit breaker room the median gate.

6. The locking device of claim 5, wherein a roller is disposed at an end of the crank arm away from the first rotating shaft, the roller is fixedly connected with the end of the crank arm away from the first rotating shaft, and the crank arm rotates around its axis.

7. The locking device of claim 6, wherein two ends of the cable are detachably connected to the crank arm and the return spring, respectively, and outer sleeve fasteners are disposed on outer peripheral surfaces of the two ends of the cable and used for mounting the cable on the crank arm and the return spring.

8. The lockout device of claim 7, wherein the drive plate is movably connected to the return spring by a pin connection; and the transmission plate is movably connected with the lock rod in a pin shaft connection mode.

9. The lockout device of claim 8, wherein the transmission plate is provided with a second shaft, the transmission plate is pivotally connected to the second shaft, and the second shaft is fixedly disposed on a side wall of the circuit breaker chamber.

10. A latch defined by claim 9 further including a removal tool for operating the attachment bar at the through hole to disengage the attachment bar to forcibly unlatch the center door.

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