CN111430162A - Maintenance locking device of outdoor vacuum circuit breaker - Google Patents

Abstract

The invention discloses an overhaul locking device of an outdoor vacuum circuit breaker, which comprises a box body and an operating rod, wherein the operating rod is limited to rotate when the circuit breaker is opened by arranging a locking mechanism, so that an overhaul worker only needs to open the circuit breaker in the overhaul process and then push a locking rod penetrating through a fixed sleeve to form limit fit with a locking arm, the locking arm and the operating rod can be prevented from rotating, the condition that the circuit breaker is switched on due to misoperation of the worker can be avoided, and after the overhaul is finished, the locking rod is pulled to be away from the locking arm to remove the limit fit of the locking rod and the locking arm, so that the circuit breaker can be switched on at the moment, play multiple guard action, improve the security of maintainer when the maintenance operation greatly.

Description

Maintenance locking device of outdoor vacuum circuit breaker

Technical Field

The invention relates to the technical field of electrical overhaul, in particular to an overhaul locking device of an outdoor vacuum circuit breaker.

Background

The most widely used outdoor vacuum circuit breaker at present adopts a three-phase strut type structure, the outdoor vacuum circuit breaker mainly comprises a circuit breaker body, a disconnecting switch and an operating mechanism, and the circuit breaker body organically combines a vacuum arc extinguish chamber, a main conductive loop, an insulating support and other parts together to form a solid-sealed pole. This kind of outdoor high pressure exchanges vacuum circuit breaker can set up multiunit vacuum circuit breaker when using on the circuit, consequently, when overhauing the circuit, the maintainer need earlier make the current disconnection with the circuit breaker separating brake of higher level, overhauls the circuit breaker of lower level again, if someone mistake closes a floodgate with the circuit breaker of higher level, probably can make the maintainer of lower level electrocute and take place the personal safety accident.

For example, chinese patent document CN202384215U discloses an interlock device for outdoor high-voltage vacuum circuit breaker and disconnecting switch, comprising a main shaft of disconnecting switch and a main shaft of circuit breaker, wherein the outer circle surface of one end of the interlock rotating shaft near the main shaft of disconnecting switch is provided with a concave notch, a stopper is fixed on the main shaft of disconnecting switch corresponding to the concave notch, the other end of the interlock rotating shaft is fixed with a connecting lever, the tail end of the connecting lever is connected with one end of a rocker plate through a connecting plate, and the other end of the rocker plate is fixed on the end of the main shaft of circuit breaker, the invention is provided with a concave notch on the interlock rotating shaft, and a stopper is fixed on the main shaft of disconnecting switch corresponding to the concave notch, so as to realize effective interlock between circuit breaker and disconnecting switch, when the circuit breaker is switched on, the stopper on the main shaft of disconnecting switch can be blocked by, the concave notch on the main shaft of the circuit breaker is aligned with the main shaft of the isolating switch, and the stop block can rotate to penetrate through the concave notch at the moment to prevent the stop block from being blocked by the interlocking rotating shaft, so that the isolating switch can be switched on and off, and the sequence of switching-off operation of the circuit breaker after switching-off and switching-off operation of the isolating switch is ensured.

According to the structure of the interlocking device, the vacuum circuit breaker and the disconnecting switch are switched off according to correct steps, when the stop block is not positioned or the rotation amplitude of the stop block is too large to penetrate through the concave notch, the circuit breaker operating shaft can rotate freely to switch on and off, and at the moment, a possible misoperation handle of a maintenance worker directly switches on the circuit breaker first, so that the maintenance worker is subjected to electric shock to generate personal safety accidents, and potential safety hazards exist.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem that the breaker is switched on due to misoperation when an outdoor vacuum breaker is maintained in the prior art so that a maintainer gets an electric shock to cause personal safety accidents is solved, thereby providing the maintenance locking device of the outdoor vacuum breaker, which can limit the rotary switching-on of the breaker when the breaker is switched off and improve the safety of the maintainer during maintenance operation.

The invention provides an overhaul locking device of an outdoor vacuum circuit breaker, which comprises a box body and an operating rod which is rotatably arranged in the box body and used for controlling the opening and closing of the circuit breaker in the box body, wherein a locking mechanism for limiting the rotation of the operating rod when the circuit breaker is opened is arranged on the box body, and the locking mechanism comprises:

the fixing sleeve is arranged on the box body and comprises a middle through hole which extends along the axial direction of the fixing sleeve and is communicated with the interior of the box body;

the locking arm is arranged in the box body and is linked with the operating rod;

the locking rod can be arranged in the middle through hole in a reciprocating sliding mode, and has a locking state which moves in the direction close to the locking arm and forms limit fit with the locking arm when stressed, and an unlocking state which moves in the direction far away from the locking arm to release the limit fit.

In the maintenance locking device of the outdoor vacuum circuit breaker, the locking arm is provided with a locking hole which is matched with the locking rod in a limiting way, and the box body corresponds to the middle through hole which is provided with a connecting hole for the locking rod to pass through.

In the maintenance locking device of the outdoor vacuum circuit breaker, the operating rod is arranged in parallel with the locking rod, and the locking arm is fixedly sleeved at one end of the operating rod and extends to one side of the locking rod.

In foretell outdoor vacuum circuit breaker's maintenance locking device, still including install in the box and with the travel switch that locking lever one end set up relatively, travel switch and control the electronic secondary control circuit who closes the separating brake of circuit breaker establishes ties, the locking lever passes when the locking state the locking hole is in order to press travel switch to and break away from when the unlocking state the locking hole with travel switch separates.

In the maintenance locking device of the outdoor vacuum circuit breaker, a limiting structure is arranged between the locking rod and the fixed sleeve, the limiting structure comprises a guide chute, two fixing grooves and a limiting driving rod, the guide chute extends along the axial direction of the fixed sleeve and is arranged on the side wall of the fixed sleeve, the two fixing grooves are arranged at two ends of the guide chute, the limiting driving rod is arranged on the locking rod and slides along the guide chute, and the limiting driving rod is in limiting clamping connection in the fixing grooves.

In the maintenance locking device of the outdoor vacuum circuit breaker, two fixing grooves are connected with the guide sliding groove to form a Z-shaped structure, and a limiting groove is formed in each fixing groove.

In foretell outdoor vacuum circuit breaker's maintenance locking device, the locking lever including slide set up in the operation end in the fixed cover with wear to stretch out in press in the box travel switch's locking end, travel switch have with locking end complex button, spacing driving lever can dismantle the setting and be in on the operation end.

In foretell outdoor vacuum circuit breaker's maintenance locking device, the operation end is equipped with instruction structure, it establishes to instruct the structure to overlap including the cover indication handle on the operation end, and set up two warning boards on the box, indication handle is in when the locking lever is in locking or unblock state respectively directional two the warning board.

In the above-mentioned service locking apparatus for the outdoor vacuum circuit breaker, an elastic biasing member is disposed between the locking end and the box body, and the elastic biasing member applies a biasing force to the locking end moving toward the locking hole.

In the maintenance locking device of the outdoor vacuum circuit breaker, the elastic biasing member is a spring sleeved on the locking rod, one end of the elastic biasing member abuts against the inner wall of the box body, and the other end of the elastic biasing member abuts against the annular step of the locking end.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the invention provides an overhaul locking device of an outdoor vacuum circuit breaker, which is characterized in that by arranging a locking mechanism, an overhaul worker only needs to open a breaker and then push a locking rod penetrating through a fixed sleeve to form limit fit with the locking arm in the overhaul process, so that the locking arm and an operating rod can be prevented from rotating to operate, the situation that the breaker is switched on due to misoperation of the worker can be avoided, and after the overhaul is finished, the locking rod is pulled to be away from the locking arm to remove the limit fit of the locking arm and the locking arm, so that the breaker can be switched on, the technical scheme is adopted, a mechanical locking structure is additionally arranged on the basis of the interlocking structure of the outdoor vacuum circuit breaker, the situation that the breaker is switched on due to unexpected factors in the overhaul process is prevented, and multiple protection effects are achieved, the safety of the maintainers during maintenance operation is greatly improved.

2. The invention provides an overhauling locking device of an outdoor vacuum circuit breaker, which further comprises a travel switch which is arranged in the box body and is opposite to one end of a locking rod, wherein the travel switch is connected in series with a secondary control loop for controlling the electric switching on and off of the circuit breaker, and in a locking state, the locking rod penetrates through a locking hole to press the travel switch to disconnect the secondary control loop, so that the situation that an operator mistakenly operates an electric button to cause the switching on of a motor-driven circuit breaker is prevented.

3. According to the maintenance locking device of the outdoor vacuum circuit breaker, the indication board is changed into a visual state when the locking rod is in the locking or unlocking state through the matching of the indication handle and the indication board, other personnel are informed whether the circuit breaker or the next-stage circuit breaker is in the maintenance state, the prompt effect is achieved, and the condition that the maintenance personnel get an electric shock due to the fact that other personnel operate the circuit breaker by mistake is avoided.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below.

Fig. 1 is a top view of a service lockout device for an outdoor vacuum circuit breaker provided in accordance with the present invention;

fig. 2 is a front view of a service lockout of an outdoor vacuum circuit breaker provided in accordance with the present invention;

fig. 3 is a schematic structural view of the maintenance locking device of the outdoor vacuum circuit breaker provided by the invention after a box body is hidden;

fig. 4 is a schematic view of the pouch of fig. 1;

FIG. 5 is a schematic diagram of the locking lever of FIG. 1;

description of reference numerals:

1-a box body;

2-operating lever; 21-a locking arm; 22-locking hole;

3, fixing a sleeve; 31-a central through hole; 32-a guide chute; 33-a fixed groove; 34-a limiting groove;

4-a locking bar; 41-a limiting deflector rod; 42-an operation end; 43-a locking end; 44-an indicator handle; 45-a prompt board; 46-an annular step;

5-a travel switch;

6-resilient biasing member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the invention provides an overhaul locking device of an outdoor vacuum circuit breaker, which comprises a box body 1 and an operating rod 2 which is rotatably arranged in the box body 1 and is used for controlling the opening and closing of the circuit breaker in the box body 1, wherein a locking mechanism for limiting the rotation of the operating rod 2 when the circuit breaker is opened is arranged on the box body 1, and the locking mechanism comprises:

the fixing sleeve 3 is arranged on the box body 1 and comprises a middle through hole 31 which extends along the axial direction of the fixing sleeve and is communicated with the interior of the box body 1;

a lock arm 21 attached to the inside of the case 1 and linked with the operation lever 2;

and the locking rod 4 is arranged in the middle through hole 31 in a reciprocating sliding manner, and has a locking state which moves in a direction close to the locking arm 21 and forms limit fit with the locking arm 21 when being stressed, and an unlocking state which moves in a direction away from the locking arm 21 to release the limit fit.

The above embodiment is the core technical solution of this embodiment, by setting the locking mechanism, the maintenance personnel only need to open the breaker first in the maintenance process, then push the locking rod 4 penetrating the fixing sleeve 3 to form the limit fit with the locking arm 21, so as to prevent the locking arm 21 and the operating rod 2 from rotating, and also avoid the occurrence of the breaker closing due to the misoperation of personnel, and after the maintenance is completed, pull the locking rod 4 away from the locking arm 21 to remove the limit fit of the locking arm and the locking arm, at this time, the breaker can perform the closing operation, by adopting the technical solution, a mechanical locking structure is additionally added on the basis of the self-interlocking structure of the outdoor vacuum breaker, so as to prevent the occurrence of the breaker closing due to unexpected factors in the maintenance process, and play a role in multiple protection, the safety of the maintainers during maintenance operation is greatly improved.

As a specific structure, as shown in fig. 3, a locking hole 22 forming a limit fit with the locking lever 4 is provided on the locking arm 21, a diameter of the locking hole 22 is slightly larger than a diameter of the locking lever 4, so that the locking lever 4 passes through the locking hole 22 and abuts against the locking arm 21 to achieve the purpose of limiting rotation of the locking arm 21, and the box body 1 is provided with a connecting hole corresponding to the middle through hole 31, through which the locking lever 4 can pass, so that when the locking lever 4 slides in the middle through hole 31, the connecting hole can penetrate into the box body 1 to form a limit fit with the locking hole 22. In this embodiment, fixed cover 3 is cylindrical structure, and its one end is provided with mounting flange, mounting flange with the correspondence is equipped with a plurality of mounting holes on the box 1, fixed cover 3 passes through mounting flange fixes on the box 1.

As shown in fig. 1, the operating rod 2 is arranged in parallel with the locking rod 4, the locking arm 21 is fixedly sleeved with a sleeve 3 and is arranged at one end of the operating rod 2 and extends towards one side of the locking rod 4, the locking rod 4 limits the rotation of the operating rod 2 while limiting the rotation of the locking arm 21, and therefore, a phenomenon that a worker mistakenly operates the operating rod 2 to cause the closing of a circuit breaker is avoided.

As a specific structure, as shown in fig. 1 and 3, the maintenance locking device of the outdoor vacuum circuit breaker further includes a travel switch 5 installed in the box 1 and opposite to one end of the locking rod 4, the travel switch 5 is connected in series with a secondary control circuit for electrically controlling the circuit breaker to close and open, the secondary control circuit is connected in series with a normally closed contact of the travel switch 5, the locking rod 4 passes through the locking hole 22 to press the travel switch 5 in a locked state, the normally closed contact is opened to open the secondary control circuit, so that an operator cannot electrically control the circuit breaker through electric remote control, and the locking rod 4 is separated from the locking hole 22 and separated from the travel switch 5 in an unlocked state to reset the normally closed contact, the secondary control circuit is closed, and through mechanical and electrical double locking, the stable and reliable formation prevents the maintenance blocking device of maloperation, makes the circuit breaker be in the state that can not manual combined floodgate or automatic combined floodgate, locks the circuit breaker in the position of separating the floodgate, provides safer personal guarantee for the maintainer.

A limiting structure is arranged between the locking rod 4 and the fixing sleeve 3, and the specific arrangement mode of the limiting structure is described in detail with reference to fig. 3-4:

the limiting structure comprises a guide chute 32 which extends along the axial direction of the fixed sleeve 3 and is arranged on the side wall of the fixed sleeve 3, two fixing grooves 33 which are arranged at two ends of the guide chute 32, the two fixing grooves 33 are connected with the guide chute 32 to form a Z-shaped structure, and a limiting deflector rod 41 which is arranged on the locking rod 4 and slides along the guide chute 32, wherein the limiting deflector rod 41 is in limiting clamping connection in the fixing grooves 33, the structure is arranged to ensure that the locking rod 4 can be conveniently switched and controlled between a locking state and an unlocking state, the locking rod 4 is firstly rotated to ensure that the limiting deflector rod 41 moves from the fixing groove 33 to the port of the guide chute 32, then the locking rod 4 is pushed or pulled to ensure that the limiting deflector rod 41 moves to another port of the fixing groove 33 along the guide chute 32, and then the locking rod 4 is continuously rotated to ensure that the limiting deflector rod 41 is in limiting clamping connection in another fixing groove 33, the switching operation is convenient, the limiting structure is simple, and the matching is reliable.

Further, a limiting groove 34 is formed in the fixing groove 33, and the limiting shifting rod 41 is limited and blocked by the limiting groove 34, so that the limiting shifting rod 41 cannot be easily separated from the fixing groove 33, and the condition that the locking mechanism is locked or unlocked due to the fact that a maintainer touches the locking rod 4 by mistake is effectively prevented.

As a specific structure, the locking rod 4 includes an operation end 42 slidably disposed in the fixing sleeve 3 and a locking end 43 penetrating into the box 1 to press the travel switch 5, the travel switch 5 has a button matching with the locking end 43, and the limiting shift lever 41 is detachably disposed on the operation end 42, because the locking rod 4 and the limiting shift lever 41 are disposed in a split structure, when the locking mechanism is installed, the locking rod 4 is inserted into the fixing sleeve 3, and then aligned with the threaded hole on the operation rod 2 and the position of the fixing groove 33 or the guide chute 32, and then the limiting shift lever 41 is screwed into the threaded hole, so that the operation is simple, and the installation is convenient and reliable.

As shown in fig. 2, operation end 42 is equipped with the instruction structure, instruct the structure to establish including the cover indicate handle 44 on the operation end 42, and set up two prompt boards 45 on the box 1, indicate handle 44 to be in locking lever 4 is directional two respectively when locking or unblock state prompt board 45, through indicate handle 44 with prompt board 45's cooperation, will locking lever 4 becomes visual prompt board 45 when being in locking or unblock state, tells whether this circuit breaker or the circuit breaker of next stage are in the maintenance state, plays the suggestion effect, avoids other personnel maloperation circuit breaker to lead to the condition emergence of maintainer electric shock.

As shown in fig. 1, 3 and 5, an elastic biasing member 6 is disposed between the locking end 43 and the box body 1, and the elastic biasing member 6 applies a biasing force to the locking end 43 to move toward the locking hole 22, so as to increase a switching speed of the locking lever 4 from the unlocked state to the locked state.

As a specific structural arrangement, the elastic biasing member 6 is a spring sleeved on the locking rod 4, one end of the elastic biasing member abuts against the inner wall of the box body 1, and the other end of the elastic biasing member abuts against the annular step 46 of the locking end 43, so that when the locking rod 4 is installed, the spring is sleeved on the locking end 43, the locking rod 4 is inserted into the fixing sleeve 3 from a connecting hole on the box body 1, and then the indicating handle 44 is fastened to the operating end 42 through a bolt structure, so that the installation of the locking rod 4 can be completed, and the structure is simple and the installation is convenient.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. The utility model provides an outdoor vacuum circuit breaker's maintenance blocking device, includes box (1), and rotatable setting is in box (1) is used for controlling action bars (2) of circuit breaker divide-shut brake in box (1), its characterized in that, be provided with on box (1) restrict during the circuit breaker separating brake action bars (2) pivoted locking mechanical system, locking mechanical system includes:

the fixing sleeve (3) is arranged on the box body (1) and comprises a middle through hole (31) which extends along the axial direction of the fixing sleeve and is communicated with the interior of the box body (1);

a lock arm (21) which is mounted in the case (1) and is linked with the operating lever (2);

the locking rod (4) can be arranged in the middle through hole (31) in a reciprocating sliding mode, and has a locking state which moves in a direction close to the locking arm (21) and forms limit fit with the locking arm (21) when stressed, and an unlocking state which moves in a direction away from the locking arm (21) to release the limit fit.

2. The overhaul locking device of an outdoor vacuum circuit breaker according to claim 1, characterized in that the locking arm (21) is provided with a locking hole (22) which forms a limit fit with the locking rod (4), and the box body (1) is provided with a connecting hole corresponding to the middle through hole (31) for the locking rod (4) to pass through.

3. The service locking device of an outdoor vacuum circuit breaker according to claim 2, characterized in that the operating rod (2) is arranged in parallel with the locking rod (4), and the locking arm (21) is fixedly sleeved at one end of the operating rod (2) and extends to one side of the locking rod (4).

4. The service locking device of the outdoor vacuum circuit breaker according to claim 3, characterized by further comprising a travel switch (5) installed in the box body (1) and arranged opposite to one end of the locking rod (4), wherein the travel switch (5) is connected in series with a secondary control loop for controlling the electric opening and closing of the circuit breaker, the locking rod (4) penetrates through the locking hole (22) to press the travel switch (5) in a locking state, and is separated from the travel switch (5) after being separated from the locking hole (22) in an unlocking state.

5. The overhaul locking device of an outdoor vacuum circuit breaker according to claim 4, characterized in that a limiting structure is arranged between the locking rod (4) and the fixing sleeve (3), the limiting structure comprises a guide chute (32) which extends along the axial direction of the fixing sleeve (3) and is arranged on the side wall of the fixing sleeve (3), two fixing grooves (33) which are arranged at two ends of the guide chute (32), and a limiting deflector rod (41) which is arranged on the locking rod (4) and slides along the guide chute (32), and the limiting deflector rod (41) is in limiting clamping connection with the fixing grooves (33).

6. Service locking device for outdoor vacuum circuit breaker according to claim 5 characterized in that two of said fixing grooves (33) are connected to said guide runner (32) in a Z-shaped configuration, and a limit groove (34) is formed in said fixing groove (33).

7. The service locking device of an outdoor vacuum circuit breaker according to any one of claims 1-6, characterized in that the locking lever (4) comprises an operating end (42) slidably arranged in the fixing sleeve (3) and a locking end (43) penetrating into the box body (1) and pressing the travel switch (5), the travel switch (5) is provided with a button matched with the locking end (43), and the limit lever (41) is detachably arranged on the operating end (42).

8. The service locking device of an outdoor vacuum circuit breaker according to claim 7, characterized in that the operating end (42) is provided with an indicating structure, the indicating structure comprises an indicating handle (44) sleeved on the operating end (42) and two prompting plates (45) arranged on the box body (1), and the indicating handle (44) points to the two prompting plates (45) respectively when the locking rod (4) is in a locking or unlocking state.

9. An service blocking device for an outdoor vacuum circuit breaker according to claim 7, characterized in that an elastic biasing member (6) is arranged between the locking end (43) and the box body (1), and the elastic biasing member (6) applies a biasing force to the locking end (43) moving towards the locking hole (22).

10. The service locking device of an outdoor vacuum circuit breaker according to claim 9, characterized in that the elastic biasing member (6) is a spring sleeved on the locking rod (4), one end of the elastic biasing member abuts against the inner wall of the box body (1), and the other end abuts against the annular step (46) of the locking end (43).

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