Auxiliary interlocking device of switch cabinet
By introducing auxiliary interlocking devices into traditional switch cabinet equipment, the grounding switch is locked with a rotary switch group and connecting rod structure, combined with crank slider and lock core structure, the traditional switch cabinet equipment cannot meet the high requirements facilities. Five defenses. The problem of the equipment improves the safety and operational reliability of the equipment.
Patent Information
- Application Number
- CN202421063797.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-16
AI Technical Summary
Traditional high-voltage switch cabinet equipment lacks manual switch locking structures and cannot meet the strict "five defense" requirements of high-demand facilities such as military industry and nuclear power, resulting in the need to use more expensive and complex switch cabinet equipment when used in these fields.
A switch cabinet auxiliary interlocking device is designed, including a mounting plate, a rotary switch group, a connecting rod structure and a sleeve. By setting a sleeve on the ground switch interlocking shaft, the connecting rod structure is extended into the limit hole by using a rotary switch. , limit the rotation of the ground switch, realize locking of the ground switch, and enhance locking safety through the crank slider mechanism and locking core structure.
It improves the safety and "five defense" level of traditional switch cabinets, reduces false contact situations, is easy to operate and has low cost, and can meet the "five defense" needs of high-demand projects such as military industry and nuclear power.
Smart Images
Figure CN222320019U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of power distribution switch cabinets, and specifically provides an auxiliary interlocking device for a switch cabinet. Background Art
[0002] High-voltage metal switchgear equipment is a three-phase AC indoor complete set of power distribution equipment, which is used to receive and distribute kilovolt network power, and to control, protect and monitor it. Metal-enclosed switchgear equipment should have a complete "five-protection" structure to prevent operators from operating incorrectly and ensure safety. Among them, when the grounding switch in the high-voltage switchgear is closed, the trolley circuit breaker cannot enter the working position, and when the grounding switch in the high-voltage switchgear is opened, the rear cabinet door cannot be opened, and preventing accidental entry into the live interval is an important part of the five-protection technology.
[0003] However, the switch cabinet equipment used in high-demand facilities such as military industry and nuclear power has more stringent "five protection" requirements, and needs to strictly protect the opening and closing of grounding switches, the position of trolley push, etc., while the traditional high-voltage switch cabinet equipment lacks a manual switch locking structure and cannot be used in high-demand projects such as military industry and nuclear power. Such projects can only use switch cabinet equipment with more expensive costs and more complex "five protection" structures. For this reason, a switch cabinet rear auxiliary interlocking device is proposed, which can be applied to traditional switch cabinet equipment, provide active locking function for each switch of traditional switch cabinet equipment, assist interlocking, improve the safety and "five protection" level of traditional switch cabinets, and further ensure the operation safety of switch cabinet equipment. Utility Model Content
[0004] The utility model provides a switch cabinet auxiliary interlocking device applied to traditional switch cabinet equipment, which provides active locking function for each switch of the traditional switch cabinet equipment and improves the five-protection level.
[0005] The technical solution of the utility model is as follows:
[0006] A switch cabinet auxiliary interlocking device comprises a mounting plate, a first support plate, a rotary switch group, a connecting rod structure and a sleeve, wherein the mounting plate is fixedly arranged on the housing of the switch cabinet, the rotary switch group is arranged on the mounting plate, the switches on the rotary switch group are provided with connecting rod structures correspondingly, the connecting rod structure is arranged below the circuit breaker compartment support plate through the first support plate, the rotary switch group is linked to the connecting rod structure for movement, the sleeve is fixedly sleeved on the grounding switch interlocking shaft, a plurality of limiting holes are arranged on the sleeve, and the connecting rod structure can be extended into the limiting holes to limit the rotation of the grounding switch interlocking shaft.
[0007] It should be noted that in traditional switch cabinet equipment, such as the KYN28A-12 AC metal-enclosed switch equipment, there is a large idle space under the circuit breaker compartment support plate. At the same time, this position is close to the trolley and the grounding switch interlocking shaft. Installing the device here can effectively save the material of the connecting rod structure and ensure the reliability of the switch locking. In this scheme, by setting a sleeve on the grounding switch interlocking shaft, by turning the corresponding switch, the connecting rod structure can be extended into the limit hole in the sleeve to limit the rotation of the grounding switch interlocking shaft. The grounding switch interlocking shaft is the basic "five-protection" structure in the switch cabinet, which directly interlocks the grounding switch. By controlling the rotation of the grounding switch interlocking shaft, the closing and opening of the grounding switch are directly locked. The working state of the grounding switch can be maintained through the locking structure, effectively avoiding the occurrence of wrong opening and wrong closing operations.
[0008] Preferably, the connecting rod structure includes a rotating rod and a crank rod, one end of the rotating rod is connected to the rotating switch group, the axis of the rotating rod coincides with the rotating shaft of the rotating switch group, the other end of the rotating rod is fixedly sleeved with a rotating arm plate, the rotating arm plate is rotatably connected to the crank rod, one end of the crank rod is provided with a push pin, the push pin is slidably arranged on a second support plate, the support plate is fixedly arranged under the circuit breaker compartment support plate, and the rotating switch group rotates to make the push pin extend into or away from the limiting hole.
[0009] In this solution, the switch rotates, directly driving the rotating rod to rotate. The crank rod, the swing arm plate and the push pin form a crank slider mechanism, which is locked by extending the push pin into the limit hole. The push pin can be controlled to perform the locking action by simple rotation.
[0010] Preferably, the rotary switch group includes an earthing opening locking switch and an earthing closing locking switch, and the rotating rods of the earthing opening locking switch and the earthing closing locking switch are arranged one high and one low, so that the top pins of the earthing opening locking switch and the earthing closing locking switch can respectively extend into different limit holes on the sleeve.
[0011] Switches are respectively set for locking the closing and opening of the grounding switch. When the grounding switch is opened, the grounding opening locking switch rotates, so that the top pin of the grounding opening locking switch extends and inserts into the corresponding limit hole of the sleeve to complete the locking of the opening, while the top pin of the grounding closing locking switch cannot extend into the corresponding limit hole; when the grounding switch is closed, the grounding closing locking switch is locked, and the grounding opening locking switch also cannot be limited. The switches are set independently to avoid mutual interference of different switch locking structures during operation.
[0012] Preferably, the rotary switch group also includes a circuit breaker test locking switch, the top pin of the circuit breaker test locking switch is slidably penetrated on the lower bottom plate of the circuit breaker compartment, and the top pin of the circuit breaker test locking switch can extend into the circuit breaker compartment from under the circuit breaker compartment support plate. When the circuit breaker is in the test position, the top pin of the circuit breaker test locking switch can abut against the trolley in the circuit breaker compartment to prevent the circuit breaker from returning to the working position.
[0013] In this scheme, the rotating rod structure of the circuit breaker test locking switch is similar to the rotating rod structure of the grounding opening locking switch and the grounding closing locking switch, except that the extension direction of the top pin is different. The top pin extends into the circuit breaker compartment to limit the movement of the trolley and provide a lock for the movement of the circuit breaker, so that the operator must confirm the state of the circuit breaker test locking switch when moving the circuit breaker to avoid the dangerous situation of the circuit breaker being in the working position when the grounding switch is closed.
[0014] Preferably, the rotary switch group includes a plurality of lock cores, the lock cores are dummy lock cores, the paddles of the lock cores are connected to the corresponding connecting rod structures, and the lock cores are rotated by corresponding keys. The switches of the rotary switch group are set as lock core structures, and only the corresponding keys can be used to rotate the corresponding locking switches, which effectively ensures that the switches are not easily rotated, greatly reducing the possibility of misoperation.
[0015] Preferably, the rotation of the lock core is divided into a locking position and an unlocking position, the key cannot be pulled out in the unlocking position of the lock core, when the lock core is in the locking position, the corresponding connecting rod structure extends, and when the lock core is in the unlocking position, the corresponding connecting rod structure is retracted.
[0016] It should be noted that the lock core used is a mortise lock. After the key is inserted and rotated, the lock core will not automatically reset. The key will remain in the lock body and cannot be directly pulled out. The key can only be pulled out by turning it back to the initial position. In this scheme, the lock position of the lock core is the initial position. The key can only be pulled out when the corresponding rotary switch is in the locked state, that is, the corresponding top pin is extended, and then the lock is maintained. By the presence or absence of the key, the operator can directly judge the opening and closing and locking conditions of the corresponding switch. While avoiding accidental touch, the lock core structure of the switch group can directly control the locking of each switch. On the original "five-protection" structure of the traditional switch cabinet, a layer of locking safety protection is applied to assist the interlocking of the switch, so that the traditional switch cabinet equipment can also meet the "five-protection" level requirements in high-demand projects such as military industry and nuclear power.
[0017] Beneficial effects of the utility model:
[0018] The utility model sets a locking structure for each switch state in the traditional switch cabinet equipment, drives the connecting rod structure by rotating the switch group, so that the connecting rod limits the action of the grounding switch, trolley and other equipment, and assists the interlocking of the switch. The utility model is easy to operate, highly reliable, and low in cost. The locking structure reduces the accidental touch of each switch, so that the operator can intuitively observe the state of each switch through this device and judge the "five protection" situation of the entire switch cabinet. On the original "five protection" structure of the traditional switch cabinet, a layer of locking safety protection is applied to the interlocking of the auxiliary switch, further ensuring the safety of the operation of the switch cabinet equipment, so that the traditional switch cabinet equipment can also meet the "five protection" level requirements in high-demand projects such as military industry and nuclear power. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a three-dimensional schematic diagram of the actual installation of the utility model;
[0021] Figure 2 It is a three-dimensional schematic diagram of another viewing angle of the utility model;
[0022] Figure 3 For this utility model Figure 2 Front view of the middle connecting rod structure.
[0023] In the above drawings, the corresponding reference numerals are as follows:
[0024] 1-mounting plate, 2-first support plate, 3-rotating switch group, 4-connecting rod structure, 41-rotating rod, 42-crank rod, 43-rotating arm plate, 44-thrust pin, 5-circuit breaker support plate, 6-grounding switch interlocking shaft, 61-sleeve, 62-limiting hole, 7-second support plate. DETAILED DESCRIPTION
[0025] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through the specific implementation methods of the embodiments of the present invention.
[0026] like Figure 1 and Figure 2An auxiliary interlocking device for a switch cabinet is shown, comprising a mounting plate 1, a first support plate 2, a rotary switch group 3, a connecting rod structure 4 and a sleeve 61, wherein the mounting plate 1 is fixedly arranged on the housing of the switch cabinet, the rotary switch group 3 is arranged on the mounting plate 1, and the switches on the rotary switch group 3 are correspondingly provided with connecting rod structures 4, the connecting rod is arranged below the circuit breaker compartment support plate through the first support plate 2, the rotary switch group 3 is linked to the connecting rod structure 4 for movement, the sleeve 61 is fixedly sleeved on the grounding switch interlocking shaft 6, a plurality of limiting holes 62 are arranged on the sleeve 61, and the connecting rod structure 4 can extend into the limiting holes 62 to limit the rotation of the grounding switch interlocking shaft 6.
[0027] Furthermore, the mounting plate 1 is mounted on the housing of the switch cabinet, and the switch structure of the rotary switch group is outside the switch cabinet, which is convenient for operators to control. The switch group is provided with multiple switches, each of which is connected to a corresponding connecting rod structure 4. When the switch is rotated, the connecting rod structure 4 will be driven to move, and a preferred connecting rod structure 4 is as follows: Figure 3 As shown, the connecting rod structure 4 includes a rotating rod 41 and a crank rod 42, one end of the rotating rod 41 is connected to the rotating switch group 3, the axis of the rotating rod 41 coincides with the rotating axis of the rotating switch group 3, the other end of the rotating rod 41 is fixedly sleeved with a rotating arm plate 43, the rotating arm plate 43 is rotatably connected to the crank rod 42, one end of the crank rod 42 is provided with a push pin 44, the push pin 44 is slidably set on the second support plate 7, the support plate is fixedly set below the support plate of the circuit breaker compartment, the rotating switch group 3 rotates to make the push pin 44 extend into or away from the limiting hole 62, the switch rotates, directly driving the rotating rod 41 to rotate, the crank rod 42, the swing arm plate 43 and the push pin 44 form a crank slider mechanism, which is locked by the push pin 44 extending into the limiting hole 62, and the push pin 44 can be controlled to perform a locking action by simply rotating.
[0028] By arranging a sleeve 61 on the grounding switch interlocking shaft 6 and rotating the corresponding switch, the connecting rod structure 4 can extend into the limiting hole 62 in the sleeve 61 to limit the rotation of the grounding switch interlocking shaft 6. The grounding switch interlocking shaft 6 is a basic "five-protection" structure, which directly interlocks the grounding switch. By controlling the rotation of the grounding switch interlocking shaft 6, the closing and opening of the grounding switch are directly locked. The working state of the grounding switch can be maintained by the locking structure, effectively avoiding the occurrence of incorrect opening and closing operations.
[0029] Embodiment 1:
[0030] The switch in the rotary switch group 3 is set as a lock core structure, the lock core is a fake mortise lock core, the paddle of the lock core is connected to the corresponding connecting rod structure 4, and the lock core is rotated by the corresponding key. The switch of the rotary switch group 3 is set as a lock core structure, and only the corresponding key can be used to rotate the corresponding locking switch, which effectively ensures that the switch is not easily rotated, greatly reducing the possibility of misoperation.
[0031] Preferably, the rotation of the lock core is divided into a locking position and an unlocking position, the key cannot be pulled out in the unlocking position of the lock core, when the lock core is in the locking position, the corresponding connecting rod structure 4 is extended, and when the lock core is in the unlocking position, the corresponding connecting rod structure 4 is retracted.
[0032] It should be noted that the lock core used is a mortise lock. After the key is inserted and rotated, the lock core will not automatically reset, and the key will remain in the lock body and cannot be directly pulled out. The key can only be pulled out by turning the key back to the initial position. In this scheme, the lock position of the lock core is the initial position. The key can only be pulled out when the corresponding rotary switch is in the locked state, that is, the corresponding top pin 44 is extended, and then the lock is maintained. That is, only the locked lock core has no key. And by the presence or absence of the key, the operator can directly judge the opening and closing and locking conditions of the corresponding switch. While avoiding accidental touch, the locking of each switch can be directly controlled by the lock core structure of the switch group. On the original "five-protection" structure of the traditional switch cabinet, a layer of locking safety protection is applied to assist the interlocking of the switch, so that the traditional switch cabinet equipment can also meet the "five-protection" level requirements in high-demand projects such as military industry and nuclear power.
[0033] Embodiment 2:
[0034] On the basis of the first embodiment, a locking switch of the grounding switch is specifically arranged on the rotary switch group 3, and the grounding switch is divided into two working states: closing and opening. Therefore, in order to avoid the two states interfering with each other when the grounding switch is locked, a grounding opening locking switch and a grounding closing locking switch are required to respectively lock the two working states of the grounding switch, and the grounding opening locking switch and the grounding closing locking switch are provided with an interlocking structure.
[0035] Specifically, the rotating rods 41 of the grounding opening lock switch and the grounding closing lock switch are arranged one high and one low, so that the top pins 44 of the grounding opening lock switch and the grounding closing lock switch can be respectively extended into different limiting holes 62 on the sleeve 61. The closing and opening of the grounding switch are respectively provided with lock cores for locking. When the grounding switch is opened, the key in the grounding opening lock switch rotates, so that the top pin 44 of the grounding opening lock switch extends and inserts into the corresponding limiting hole 62 of the sleeve 61, completing the locking of the opening. At this time, the key of the grounding opening lock switch can be pulled out, and the top pin 44 of the grounding closing lock switch cannot be extended into the corresponding limiting hole 62, so the key of the grounding closing lock switch cannot be pulled out; and when the grounding switch is closed, the grounding closing lock switch is locked, and the grounding opening lock switch cannot be limited, and the key of the opening lock cannot be pulled out. The switches are arranged independently to avoid mutual interference of different switch locking structures during operation.
[0036] Embodiment three:
[0037] Different from the second embodiment, on the basis of the first embodiment, the rotary switch group 3 also includes a circuit breaker test locking switch. One of the "five protections" is that when the grounding switch is open, the circuit breaker cannot be moved from the test position to the working position. The grounding switch can only be closed when the circuit breaker is in the test position, so it is necessary to strictly protect the position of the trolley equipped with the short circuit breaker, so the circuit breaker test locking switch is set to further limit the position of the circuit breaker trolley.
[0038] Specifically, the top pin 44 of the circuit breaker test lock switch is slidably penetrated on the bottom plate of the circuit breaker compartment, and the top pin 44 of the circuit breaker test lock switch can extend into the circuit breaker compartment from below the circuit breaker compartment support plate. When the circuit breaker is in the test position, the key is turned so that the top pin 44 of the circuit breaker test lock switch can abut against the trolley in the circuit breaker compartment to prevent the circuit breaker from returning to the working position. The structure of the rotating rod 41 of the circuit breaker test lock switch is similar to the structure of the rotating rod 41 of the grounding opening lock switch and the grounding closing lock switch, except that the top pin 44 has a different extension direction. The top pin 44 extends into the circuit breaker compartment to limit the movement of the trolley and provide a lock for the movement of the circuit breaker, so that the operator must confirm the state of the circuit breaker test lock switch when moving the circuit breaker. Only by reinserting the key and turning the lock core can the limit lock of the circuit breaker test position be contacted to avoid the dangerous situation of the circuit breaker being in the working position when the grounding switch is closed.
[0039] Embodiment 4:
[0040] On the basis of Embodiments 1 to 3, Figure 1 and Figure 2As shown, the switches in the rotary switch group 3 include but are not limited to a grounding opening locking switch, a grounding closing locking switch, a circuit breaker test locking switch, and a rear cover closing locking switch.
[0041] The grounding opening locking switch is used when the grounding switch is opened. By turning on this switch, the grounding switch interlocking shaft 6 is locked. Unless the grounding opening locking switch is closed, the grounding switch cannot be closed; similarly, the grounding opening locking switch is used when the grounding switch is closed. By turning on this switch, the grounding switch interlocking shaft 6 is locked. Unless the grounding closing locking switch is closed, the grounding switch cannot be opened; the circuit breaker experimental locking switch is used when the circuit breaker is in the experimental position to limit the movement of the trolley. Unless the circuit breaker experimental locking switch is closed, the circuit breaker cannot be moved to the working position; the rear cover plate closing locking switch is used when the rear cover plate is closed. By locking the rear cover plate, the closure of the rear cover plate is ensured. Unless the rear cover plate closing locking switch is closed, the rear cover plate cannot be opened.
[0042] Different limit switches are set according to different switch cabinet equipment. At the same time, as in the present embodiment, the locking switches can be centrally set together. The lock of the corresponding switch can only be touched by using the key of the corresponding switch. The operator can judge whether the "five protections" are in place according to the switch position. At the same time, the operator needs to confirm through this device when opening and closing different switches, so as to avoid accidental touching and wrong opening and closing of the switch, which can greatly improve the safety performance of traditional switch cabinet equipment.
[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A switch cabinet auxiliary interlocking device, characterized in that: The invention comprises a mounting plate (1), a first support plate (2), a rotary switch group (3), a connecting rod structure (4) and a sleeve (61); the mounting plate (1) is fixedly mounted on a housing of a switch cabinet; the rotary switch group (3) is arranged on the mounting plate (1); a connecting rod structure (4) is arranged corresponding to the switch on the rotary switch group (3); the connecting rod structure (4) is arranged below a circuit breaker compartment support plate (5) through the first support plate (2); the rotary switch group (3) is linked to the connecting rod structure (4) for movement; the sleeve (61) is fixedly sleeved on a grounding switch interlocking shaft (6); a plurality of limiting holes (62) are arranged on the sleeve (61); the connecting rod structure (4) can extend into the limiting holes (62) to limit the rotation of the grounding switch interlocking shaft (6).
2. A switch cabinet auxiliary interlocking device according to claim 1, characterized in that: The connecting rod structure (4) comprises a rotating rod (41) and a crank rod (42); one end of the rotating rod (41) is connected to the rotating switch group (3); the axis of the rotating rod (41) coincides with the rotating axis of the corresponding switch in the rotating switch group (3); the other end of the rotating rod (41) is fixedly sleeved with a rotating arm plate (43); the rotating arm plate (43) is rotatably connected to the crank rod (42); one end of the crank rod (42) is provided with a push pin (44); the push pin (44) is slidably arranged on a second support plate (7); the second support plate (7) is fixedly arranged below the circuit breaker compartment support plate (5); the rotating switch group (3) rotates so that the push pin (44) extends into or away from the limiting hole (62).
3. A switch cabinet auxiliary interlocking device according to claim 2, characterized in that: The rotary switch group (3) comprises an earthing opening locking switch and an earthing closing locking switch, wherein the rotating rods (41) of the earthing opening locking switch and the earthing closing locking switch are arranged one high and one low, so that the top pins (44) of the earthing opening locking switch and the earthing closing locking switch can respectively extend into different limit holes (62) on the sleeve (61).
4. A switch cabinet auxiliary interlocking device according to claim 3, characterized in that: The rotary switch group (3) also includes a circuit breaker test locking switch, the top pin (44) of the circuit breaker test locking switch is slidably arranged on the lower bottom plate of the circuit breaker compartment, the top pin (44) of the circuit breaker test locking switch can extend into the circuit breaker compartment from below the circuit breaker compartment support plate (5), and when the circuit breaker is in the test position, the top pin (44) of the circuit breaker test locking switch can abut against a trolley in the circuit breaker compartment to prevent the circuit breaker from returning to the working position.
5. A switch cabinet auxiliary interlocking device according to any one of claims 1 to 4, characterized in that: The rotary switch group (3) comprises a plurality of lock cores, wherein the lock cores are dummy mortise lock cores, the paddles of the lock cores are connected to the corresponding connecting rod structures (4), and the lock cores are rotated by means of corresponding keys.
6. A switch cabinet auxiliary interlocking device according to claim 5, characterized in that: The lock core is rotated into a locking position and an unlocking position. The key cannot be pulled out in the unlocking position of the lock core. When the lock core is in the locking position, the corresponding connecting rod structure (4) extends. When the lock core is in the unlocking position, the corresponding connecting rod structure (4) retracts.