CN210182903U - Normal-pressure sealed shielding type solid insulation switch cabinet and switch equipment - Google Patents

Abstract

The utility model provides a sealed shielding type solid insulation cubical switchboard of ordinary pressure and switchgear relates to power transmission and distribution switchgear technical field, including the casing and be located inside first contact, isolation switch, second contact and the ground contact of casing. One end of the isolation disconnecting link is connected with the second contact, when the isolation disconnecting link is in a closing state, the other end of the isolation disconnecting link is connected with the first contact, and when the isolation disconnecting link is in a grounding state, the other end of the isolation disconnecting link is connected with the grounding contact. And operating the isolation disconnecting link to act and connect with the grounding contact, thereby forming a grounding state that two ends of the isolation disconnecting link are respectively connected with the second contact and the grounding contact. At this time, even if leakage current is formed between the first contact and the second contact through the shell or other connecting bodies, the leakage current can be led into the ground through the grounding state of the isolation disconnecting link, so that the leakage current is prevented from conducting the first contact and the second contact to form a conductive loop, and personal damage is caused to an operator.

Description

Normal-pressure sealed shielding type solid insulation switch cabinet and switch equipment

Technical Field

The utility model relates to a power transmission and distribution switchgear technical field particularly, relates to a sealed shielding type solid insulation cubical switchboard of ordinary pressure and switchgear.

Background

With the rapid development of economy, infrastructure laying is more comprehensive. In the existing power supply network system, the power supply network usually forms a ring-shaped connection network to form a ring network for power supply, so that a user can obtain electric energy on the power supply network from two directions, and the reliability of power supply can be improved. In the ring network power supply equipment, the ring main unit is a core switch equipment, and the ring main unit is usually provided with an isolating switch, so that an obvious breakpoint is formed on a line.

In the existing ring main unit, when the isolating switch is in an opening state, a fracture can be formed between the wire inlet part and the wire outlet part, but the fracture is connected with the wire inlet part and the wire outlet part due to the existence of the shell, so that leakage current (namely, a false fracture) is easy to occur, and a series of unsafe accidents are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough among the above-mentioned prior art, provide a normal pressure sealed shielding type solid insulation cubical switchboard and switchgear to solve the problem that the isolator appears the false fracture in the current looped netowrk cabinet.

In order to achieve the above object, the utility model adopts the following technical scheme:

one aspect of the present invention provides a normal pressure sealed shielded solid insulated switchgear, which includes a housing, and a first contact, an isolation switch, a second contact and a ground contact inside the housing; one end of the isolation disconnecting link is connected with the second contact, the isolation disconnecting link comprises a switching-on state and a grounding state, the switching-on state is that two ends of the isolation disconnecting link are respectively connected with the second contact and the first contact, and the grounding state is that two ends of the isolation disconnecting link are respectively connected with the second contact and the grounding contact.

Optionally, the housing includes an outer housing and an inner housing disposed within the outer housing; a closed clamping cavity is formed between the outer shell and the inner shell.

Optionally, the normal-pressure sealed shielded solid insulated switchgear further comprises an incoming conductor, an outgoing conductor and a breaker assembly; the wire inlet conductor is positioned in the clamping cavity and is connected with the first contact; the outgoing conductor is positioned in the clamping cavity, and the outgoing conductor and the second contact are respectively connected with two ends of the breaker assembly.

Optionally, the circuit breaker assembly further comprises a flexible connecting sheet, an insulating pull rod and a vacuum arc-extinguishing chamber; a movable conducting rod of the vacuum arc extinguish chamber penetrates through the flexible connecting sheet to be connected with one end of the insulating pull rod; the second contact is connected with the movable conducting rod through a flexible connecting sheet; the outgoing conductor is connected with a static conducting rod of the vacuum arc-extinguishing chamber.

Optionally, the incoming line conductor and the outgoing line conductor are respectively coated with a semiconductor layer; the periphery of the semiconductor layer is also sleeved with a shielding sleeve.

Optionally, the periphery of the vacuum arc-extinguishing chamber is further coated with a liquid silicone rubber layer.

On the other hand, the utility model provides a switch device, which comprises a transmission case and three normal pressure sealed shielded solid insulated switch cabinets; the three normal-pressure sealed shielding type solid insulation switch cabinets are respectively attached to one side wall of the transmission case, a first transmission mechanism is further arranged in the transmission case, and the first transmission mechanism is respectively connected with the three isolation disconnecting links through holes formed in the attachment surface and drives the three isolation disconnecting links to move.

Optionally, when the normal-pressure sealed shielding type solid insulation switch cabinet further comprises a circuit breaker assembly, and the circuit breaker assembly comprises an insulation pull rod, a second transmission mechanism is further arranged in the transmission box, and the second transmission mechanism is connected with the insulation pull rod through a through hole and enables the insulation pull rod to act.

Optionally, the switch device further comprises a distance sensor, and an illuminator and a controller arranged in the transmission case; the transmission case is also provided with an observation window, the illuminator is electrically connected with the controller, and the distance sensor is electrically connected with the controller and arranged on the outer wall of the transmission case; the distance sensor is used for identifying an object in a preset range and sending an identified object signal to the controller; the controller is used for receiving the object signal and sending a control signal to the illuminator; the illuminator is used for receiving the control signal and illuminating the interior of the transmission case.

Optionally, the transmission case includes a transmission case body with an opening and a cover plate covering the opening, and the cover plate is detachably connected with the transmission case body; the three normal-pressure sealed shielding type solid insulation switch cabinets are respectively attached to one side wall of the transmission case body, and the first transmission mechanism is located inside the transmission case body.

The beneficial effects of the utility model include:

the utility model provides a sealed shielding type solid insulation cubical switchboard of ordinary pressure, including the casing and be located inside first contact, isolation switch, second contact and the ground contact of casing. One end of the isolation disconnecting link is connected with the second contact, when the isolation disconnecting link is in a closing state, the other end of the isolation disconnecting link is connected with the first contact, and when the isolation disconnecting link is in a grounding state, the other end of the isolation disconnecting link is connected with the grounding contact. Through the connection mode, when the isolation disconnecting link is in a closing state, the isolation disconnecting link and the first contact and the second contact form a complete conductive path. And then when the conductive path needs to be disconnected, operating the isolation disconnecting link to disconnect the isolation disconnecting link originally connected with the first contact from the first contact, forming an obvious breakpoint between the isolation disconnecting link and the first contact, and simultaneously connecting the isolation disconnecting link disconnected with the first contact with the grounding contact, thereby forming a grounding state that two ends of the isolation disconnecting link are respectively connected with the second contact and the grounding contact. At this time, even if leakage current is formed between the first contact and the second contact through the shell or other connecting bodies, the leakage current can be led into the ground through the grounding state of the isolation disconnecting link, so that the leakage current is prevented from conducting the first contact and the second contact to form a conductive loop, and personal damage is caused to an operator.

The utility model also provides a switchgear sets up foretell normal pressure sealed shield type solid insulated switchgear threely, and corresponds A looks, B looks, C looks among the connection transmission line respectively. Meanwhile, a transmission case is arranged on one side of the three normal-pressure sealed and shielded solid insulation switch cabinets, so that isolation switches or circuit breaker components in the three normal-pressure sealed and shielded solid insulation switch cabinets are operated through the transmission case, the A phase, the B phase and the C phase are respectively disconnected, the automation degree of driving the isolation switches or circuit breaker components in the normal-pressure sealed and shielded solid insulation switch cabinets to act is further improved through a transmission mechanism in the transmission case under the condition that false fractures are avoided, and a series of unsafe accidents caused by direct contact of operators with the isolation switches are avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a normal pressure sealed shielded solid insulated switchgear provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a switchgear according to an embodiment of the present invention;

fig. 3 is a second schematic structural diagram of a switchgear according to an embodiment of the present invention;

fig. 4 is a third schematic structural diagram of a switchgear according to an embodiment of the present invention.

Icon: 100-a housing; 1001-outer shell; 1002-an inner housing; 101-isolation disconnecting link; 102-a first contact; 103-a second contact; 104-ground contacts; 105-an incoming conductor; 1051-a semiconductor layer; 1052-shielding sleeve; 106-outgoing line conductors; 107-soft connecting sheets; 108-insulating tie rods; 109-a vacuum arc-extinguishing chamber; 1091-a liquid silicone rubber layer; 120-a transmission case; 121-a first transmission mechanism; 122-a second transmission mechanism; 123-isolated operation hole; 124-ground operation hole; 125-circuit breaker operating knob; 126-sign and interlocking baffle; 127-a cam; 128-a first interlock plate; 129-a second interlock plate; 130-a mounting plate; 131-an observation window; 132-isolation switch operating knob; 133-a first bevel gear; 134-second bevel gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. It should be noted that, in the case of no conflict, various features in the embodiments of the present invention may be combined with each other, and the combined embodiments are still within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", "inner", "outer", etc. are only used for convenience of description and simplification of description, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In one aspect of the embodiment of the present invention, there is provided a normal pressure sealed shielded solid insulated switchgear, as shown in fig. 1, including a housing 100, and a first contact 102, an isolation switch 101, a second contact 103 and a ground contact 104 located inside the housing 100; one end of the isolation switch 101 is connected to the second contact 103, and the isolation switch 101 includes a switch-on state and a ground state, where the switch-on state is that two ends of the isolation switch 101 are respectively connected to the second contact 103 and the first contact 102, and the ground state is that two ends of the isolation switch 101 are respectively connected to the second contact 103 and the ground contact 104.

As shown in fig. 1, a first contact 102 is provided at an upper position on an inner wall of the housing 100, and a second contact 103 is provided at a position slightly lower than the inner wall of the housing 100. One end of the isolation switch 101 is connected to the second contact 103, and can rotate around the second contact 103. When the isolation switch 101 rotates around the second contact 103 to the first contact 102 and connects with the first contact 102, the circuit is in a conducting state, and current can flow through the isolation switch 101 through the first contact 102 and flow out through the second contact 103 to form a complete conducting path. When the disconnecting is needed, the isolating switch 101 is controlled to act, so that the isolating switch 101 rotates around the second contact 103, an obvious breakpoint is formed between the first contact 102 and the second contact 103, and meanwhile, the isolating switch 101 is finally connected with the grounding contact 104, namely, a grounding state. At this time, even if a leakage current is formed between the first contact 102 and the second contact 103 through the housing 100 or other connecting bodies, the leakage current can be conducted to the ground through the grounding state of the isolation switch 101, so that the problem of false fracture is fundamentally solved, and personal harm or other series of damages to an operator caused by the fact that the leakage current conducts the first contact 102 and the second contact 103 to form a conductive loop is avoided. When grounding is needed, the vacuum arc-extinguishing chamber 109 can be closed, and safe closing in a short-circuit state is ensured. First, the housing 100 should be made of an insulating material to meet the requirement. When a voltage is applied across any insulating material, a certain current always passes through the insulating material, the active component of the current is called leakage current, and the phenomenon is called leakage of the insulator. Secondly, the second contact 103 may also be an inverted T-shaped contact, the vertical end may be connected to the isolation switch 101, and the horizontal end may be used as a base to be fixed to the housing 100, so that the mounting volume is large, and the assembly and disassembly are convenient. Thirdly, when the isolation switch 101 is in a switch-on state and a grounding state, the isolation switch 101 may be in a switch-off state in which one end of the isolation switch 101 is connected to only the second contact 103 and the other end of the isolation switch is suspended. Namely, the function of the three-station isolation switch 101 is realized. The material of the housing 100 may also be a thermosetting material, such as epoxy, or a thermoplastic material, such as reinforced nylon. Semiconductor paint can be sprayed on the outer wall of the shell 100, so that a protection function can be formed on the shell 100.

Optionally, the housing 100 includes an outer housing 1001 and an inner housing 1002 disposed within the outer housing 1001; a closed nip is formed between the outer housing 1001 and the inner housing 1002.

For example, as shown in fig. 1, the housing 100 includes an outer housing 1001 and an inner housing 1002, the outer housing 1001 is disposed on the outer periphery of the inner housing 1002, and an interlayer, i.e., a clamping cavity, is disposed between the inner and outer housings 1001. In order to ensure that the cavity plays a role of increasing the insulating ability, it should be isolated from the outside and be in a sealed state, i.e. the inner housing 1002 is sealed, and the cavity between the inner housing 1002 and the outer housing 1001 is also sealed. Meanwhile, air is filled in the clamping cavity, so that the insulating capability of the shell 100 is further improved, and the internal devices can be ensured to run for a long time without being rusted. In order to simplify the process steps and reduce the manufacturing cost during manufacturing, the air in the cavity may be air in a normal pressure state. In addition, those skilled in the art should know what gas and what composition the air is, and will not be described in detail herein. The filling of air can avoid the use of sulfur hexafluoride gas with high pollution, so that the application has the advantages of low cost, safety, reliability, energy conservation and environmental protection.

Optionally, the normal-pressure sealed shielded solid insulated switchgear further includes an incoming conductor 105, an outgoing conductor 106, and a circuit breaker assembly; the incoming line conductor 105 is positioned in the clamping cavity, and the incoming line conductor 105 is connected with the first contact 102; an outlet conductor 106 is positioned within the chamber, and the outlet conductor 106 and the second contact 103 are connected to respective ends of the circuit breaker assembly.

As shown in fig. 1, the normal pressure sealed shielded solid insulated switchgear further includes an incoming conductor 105 and an outgoing conductor 106 disposed in the clamping cavity, wherein one end of the incoming conductor 105 extends to the upper end of the outer housing 1001 in the clamping cavity, and a connector for connecting an external cable is disposed at the end of the incoming conductor 105. Meanwhile, in order to ensure the tightness of the clamp cavity at the intersection of the incoming conductor 105 and the outer housing 1001, a sealing measure, such as a sealing rubber ring or a sealing silicone ring, should be provided here. The other end of the incoming conductor 105 extends inside the clamping cavity to the first contact 102 and is connected thereto. At the same time, a sealing measure should be performed at the first contact 102 to ensure that the space inside the inner housing 1002 is completely isolated from the space inside the clamping cavity. Meanwhile, one end of the outgoing conductor 106 extends to a position to the left of the bottom end of the outer housing 1001, and a corresponding cable connector is also provided at this point. The other end of the outgoing conductor 106 extends to one end of the breaker assembly, and may be connected to a static conductive rod or a dynamic conductive rod of the breaker assembly, and similarly, in order to ensure that a complete conductive path may be formed, the second contact 103 is connected to the other end of the breaker assembly, so that when the isolation switch 101 is in a closing state and the breaker assembly is also in a closing state, a complete path from the incoming conductor 105 to the outgoing conductor 106 may be formed. First, the incoming conductor 105 and the outgoing conductor 106 may be solid copper bars or solid aluminum bars. Second, the incoming conductor 105 and the first contact 102 may be integrally formed, or may be manufactured in segments and connected together, which is not specifically limited in this application. Thirdly, the incoming conductor 105, the outgoing conductor 106 and the first contact 102 may be disposed by casting. Fourthly, zinc is sprayed at the joint of the cable externally connected with the incoming line conductor 105 and the joint of the cable externally connected with the outgoing line conductor 106.

Optionally, the circuit breaker assembly further includes a flexible connecting piece 107, an insulating pull rod 108, and a vacuum arc-extinguishing chamber 109; a movable conducting rod of the vacuum arc extinguish chamber 109 penetrates through the flexible connecting sheet 107 to be connected with one end of the insulating pull rod 108; the second contact 103 is connected with the movable conducting rod through a flexible connecting sheet 107; the outgoing conductor 106 is connected to a static conductive rod of the vacuum interrupter 109.

Illustratively, as shown in fig. 1, the circuit breaker assembly includes a flexible connecting piece 107, an insulating pull rod 108, and a vacuum interrupter 109. The moving conducting rod of the vacuum arc-extinguishing chamber 109 passes through the flexible connecting sheet 107, that is, the flexible connecting sheet 107 is provided with a through hole corresponding to the moving conducting rod, and the moving conducting rod and the flexible connecting sheet are connected at the same time and connected with an insulating guide rod, and the insulating guide rod drives the moving conducting rod to move. Further, the outgoing conductor 106 is connected to a static conductive rod. Due to the deformable characteristic of the flexible connecting sheet 107, the second contact 103 or the movable conductive rod can be prevented from being damaged while the movable conductive rod is driven by the insulating pull rod 108. As shown in fig. 1, the flexible connecting piece 107 should be in a bent state when the circuit breaker is in a closed state, so that when the insulating pull rod 108 moves leftwards, a large movement range can be provided for the flexible connecting piece, the opening reliability of the circuit breaker can be ensured, and meanwhile, the flexible connecting piece 107 can be prevented from being damaged. It should be noted that the first flexible connecting sheet 107 should be a conductor. Secondly, the vacuum interrupter 109 may be composed of a movable conducting rod, a guide sleeve, a bellows, a movable cover plate, a bellows shield, a magnetic shell, a shield cylinder, a contact system, a static conducting rod, a static cover plate, and other components, wherein the movable cover plate and the static cover plate are respectively covered at two ends of the magnetic shell, the movable conducting rod is arranged outside the magnetic shell, and penetrates through the guide sleeve and the movable cover plate to extend into the magnetic shell, the movable conducting rod sequentially penetrates through the bellows arranged inside the magnetic shell and one end of the bellows shield extending into the shield cylinder to connect with the static conducting rod, and the static conducting rod penetrates through the static cover plate.

As shown in fig. 1, the incoming conductor 105, the first contact 102, the isolation switch 101, the second contact 103, the flexible connecting piece 107, the vacuum interrupter 109, and the outgoing conductor 106 are connected in sequence, so that the isolation switch 101 is located above the vacuum interrupter 109. The vacuum interrupter 109 may also be placed horizontally inside the inner housing 1002 to improve stability.

Optionally, the incoming line conductor 105 and the outgoing line conductor 106 are respectively coated with a semiconductor layer 1051; a shield 1052 is further provided around the semiconductor layer 1051.

As shown in fig. 1, the incoming conductor 105 and the outgoing conductor 106 are further coated with a semiconductor layer 1051, so that the insulation property can be further improved and the occurrence of partial discharge can be reduced. In addition, a shielding sleeve 1052 may be further sleeved on the semiconductor layer 1051 wrapped on the incoming conductor 105 and the semiconductor layer 1051 wrapped on the outgoing conductor 106, as shown in fig. 1, one shielding sleeve 1052 is sleeved on the incoming conductor 105, and two shielding sleeves 1052 are sleeved on the outgoing conductor 106. In addition, the connecting conductor of the shield 1052 is passed through the through hole formed in the outer case 1001 and grounded, so that current can be prevented from being introduced into the ground in time when the current leakage or the disconnection occurs. Further improving the safety. The semiconductor layer 1051 may be in various forms such as a semiconductor silicon gel or a semiconductor germanium. The shielding sleeve 1052 may be in the form of a mesh structure or a thin film structure made of carbon fiber semiconductor or semiconductor germanium, etc.

Optionally, the outer periphery of the vacuum arc-extinguishing chamber 109 is further covered with a liquid silicone rubber layer 1091.

For example, as shown in fig. 1, the vacuum interrupter 109 is horizontally installed in a limiting installation space formed by the inner housing 1002, the limiting installation space is adapted to the shape of the vacuum interrupter 109 to provide a certain limiting installation function, and the outer peripheral wall of the vacuum interrupter 109 may be further coated with a liquid silicone rubber layer 1091, so that the stability of the insulating cover can be improved by the expansion and contraction characteristics of the liquid silicone rubber layer 1091 itself.

On the other hand, the utility model provides a switch device, which comprises a transmission case 120 and three normal pressure sealed shielded solid insulated switch cabinets; the three normal-pressure sealed and shielded solid insulation switch cabinets are respectively attached to one side wall of the transmission case 120, a first transmission mechanism 121 is further arranged in the transmission case 120, and the first transmission mechanism 121 is respectively connected with the three isolation switches 101 through holes arranged on the attachment surfaces and drives the three isolation switches to act.

For example, as shown in fig. 2 and fig. 3, the switchgear includes three constant-voltage sealed and shielded solid-state insulated switch cabinets, and the three constant-voltage sealed and shielded solid-state insulated switch cabinets are respectively connected to the phase a, the phase B, and the phase C in the power transmission line. Therefore, the phase A, the phase B and the phase C can be separated and independent, and the phase A, the phase B and the phase C are independently sealed. Meanwhile, the transmission case 120 is arranged on one side of the three normal-pressure sealed and shielded solid insulation switch cabinets, so that the isolation disconnecting link 101 in the three normal-pressure sealed and shielded solid insulation switch cabinets is operated by the transmission case 120 through movable fit, that is, the phase a, the phase B and the phase C are respectively switched on (in a connection state shown in fig. 3) and switched off (in a connection state shown in fig. 4), and under the condition of avoiding a false fracture of the isolation disconnecting link 101, the automation degree of driving the isolation disconnecting link 101 in the normal-pressure sealed and shielded solid insulation switch cabinets to act is further improved through a transmission mechanism in the transmission case 120, and a series of unsafe accidents caused by direct contact of an operator with the isolation switch are avoided. In addition, an operation knob may be further disposed on an outer wall of the transmission case 120, and connected to the first transmission mechanism 121, and a double O-ring may be further disposed at a position where the operation knob penetrates through a sidewall of the transmission case 120, so as to ensure sealing performance, and meanwhile, a hexagonal connection groove is employed at a position where the operation knob is connected to an inside of the transmission case 120, so as to ensure that air inside the housing 100 and air outside the housing cannot be replaced. The transmission case 120 and the three normal-pressure sealed and shielded solid-insulated switch cabinets can be dug on the attached side walls to form through holes, that is, the transmission case 120 can be communicated with the internal space of the normal-pressure sealed and shielded solid-insulated switch cabinets, and a deformable sealing structure can be arranged at the through holes, for example, a folded rubber ring and the like can separate the space between the transmission case and the normal-pressure sealed and shielded solid-insulated switch cabinets. The transmission case 120 may be a structure formed by welding metal plates by a robot. As shown in fig. 3, the first transmission mechanism 121 may be an isolation switch operating knob 132 disposed on the outer wall of the transmission case 120, and the first bevel gear 133 rotates, and the second bevel gear 134 engaged with the first bevel gear 133 rotates, and then drives the eccentric wheel to rotate, and pulls the pull rod to move left and right, so that the isolation switch 101 operates.

In order to further improve the installation convenience of the normal-pressure sealed and shielded solid insulated switchgear, the bottom of the normal-pressure sealed and shielded solid insulated switchgear may be provided with an installation plate 130, and the installation plate 130 may be provided with an installation hole and the like. As shown in fig. 2, the outgoing conductors 106 of all three of the normally-sealed and shielded solid insulated switchgear extend through the mounting plate 130.

Optionally, when the normal-pressure sealed and shielded solid-insulated switchgear further includes a circuit breaker assembly, and the circuit breaker assembly includes the insulating pull rod 108, a second transmission mechanism 122 is further disposed in the transmission box 120, and the second transmission mechanism 122 is connected to the insulating pull rod 108 through the through hole and enables the insulating pull rod 108 to operate.

For example, in order to further improve the functional completeness of the switchgear, when a breaker assembly, that is, an insulating pull rod 108, a vacuum arc-extinguishing chamber 109 and the like, are further disposed in the normal-pressure sealed and shielded solid-insulated switchgear, a second transmission mechanism 122 is further disposed in the transmission box 120, and the insulating pull rod 108 is pulled through the second transmission mechanism, so that the insulating pull rod 108 drives the movable conducting rod, and thus the breaker is disconnected. The safety can be effectively improved, and meanwhile, the convenience of operation is improved. The second transmission mechanism 122 may be a rotation-to-pumping type operating mechanism that converts the rotation in the left-right direction into the rotation in the front-rear direction with reference to the similarity of the first transmission mechanism.

In addition, in order to further improve the safety and reliability of the switch device, a five-prevention interlocking mechanism can be further arranged, so that the circuit breaker can be effectively prevented from being switched off and on by mistake, the isolation knife switch 101 can be prevented from being pulled and switched on by a load, the grounding switch can be prevented from being switched on by a live connection, the circuit breaker can be prevented from being switched on by a ground connection, and the live gap can be prevented from being entered by a fault. For example, as shown in fig. 2, when the disconnecting switch 101 is in a closed state, the ground operation hole 124 is blocked by the indicating plate/interlocking shutter 126 and is not operated. When the circuit breaker assembly is in a closed state, the cam 127 pushes up the first locking plate 128 to shield the ground operation hole 124 and the isolation operation hole 123 from operation. When the disconnector is in the open state, the second interlock plate 129 holds the breaker operation knob 125 against it so as not to be operated.

Optionally, the switch device further comprises a distance sensor and an illuminator and a controller disposed in the transmission case 120; the transmission case 120 is further provided with an observation window 131, the illuminator is electrically connected with the controller, and the distance sensor is electrically connected with the controller and arranged on the outer wall of the transmission case 120; the distance sensor is used for identifying an object in a preset range and sending an identified object signal to the controller; the controller is used for receiving the object signal and sending a control signal to the illuminator; the illuminator is used to receive the control signal and illuminate the interior of the transmission case 120.

For example, as shown in fig. 2, an observation window 131 is further disposed on the transmission case 120, and the window body material may be in various forms such as explosion-proof transparent plastic or explosion-proof toughened glass. At this time, a lighting device (which may be an LED lamp or the like) is further disposed in the transmission case 120, and is electrically connected to a controller also disposed in the transmission case 120, and a distance sensor is further disposed at a position on an outer wall of the transmission case 120, which is close to the observation window 131, a preset distance value is pre-written in the controller, the distance sensor detects a distance from an object to the distance sensor in real time and transmits distance information to the controller, the controller compares the distance information with the preset distance value, when the detected distance value is less than or equal to the preset distance value, the controller controls to transmit a control signal to the lighting device, and the lighting device starts lighting after receiving the control signal. When the detected distance value is greater than the preset distance value, the controller does not act, and the illuminator turns off the illumination. Through the mode, the automatic control of the illuminator can be realized, and when the inspection personnel are close to the observation window 131, the illuminator can automatically illuminate the interior of the transmission case 120, so that the inspection personnel can check the interior conditions conveniently.

Optionally, the transmission case 120 includes a transmission case 120 body having an opening and a cover plate covering the opening, and the cover plate is detachably connected to the transmission case 120 body; the three normal-pressure sealed shielding type solid insulation switch cabinets are respectively attached to one side wall of the transmission case 120 body, and the first transmission mechanism 121 is located inside the transmission case 120 body.

For example, as shown in fig. 3, an opening is further formed at one side of the transmission case 120, and the opening is covered by a cover plate, so that the internal space of the case is sealed from the outside. The cover plate is detachably connected with the transmission case 120 body, so that the maintenance convenience can be improved. Sealing measures can be provided at the connection between the cover and the transmission case 120 to improve sealing performance.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A normal-pressure sealed shielding type solid insulation switch cabinet is characterized by comprising a shell, a first contact, an isolation disconnecting link, a second contact and a grounding contact, wherein the first contact, the isolation disconnecting link, the second contact and the grounding contact are positioned in the shell; one end of the isolation disconnecting link is connected with the second contact, the isolation disconnecting link comprises a switching-on state and a grounding state, wherein the switching-on state is that two ends of the isolation disconnecting link are respectively connected with the second contact and the first contact, and the grounding state is that two ends of the isolation disconnecting link are respectively connected with the second contact and the grounding contact.

2. The normal pressure sealed shielded solid insulated switchgear cabinet according to claim 1, wherein said housing comprises an outer housing and an inner housing disposed inside said outer housing; and a closed clamping cavity is formed between the outer shell and the inner shell.

3. The normal pressure sealed shielding type solid insulation switch cabinet according to claim 2, further comprising an incoming conductor, an outgoing conductor and a breaker assembly; the wire inlet conductor is positioned in the clamping cavity and is connected with the first contact; the outgoing conductor is positioned in the clamping cavity, and the outgoing conductor and the second contact are respectively connected with two ends of the circuit breaker assembly.

4. The atmospheric-pressure-sealed shielding-type solid insulation switch cabinet according to claim 3, wherein the circuit breaker assembly further comprises a soft connecting sheet, an insulating pull rod and a vacuum arc-extinguishing chamber; a movable conducting rod of the vacuum arc extinguish chamber penetrates through the flexible connecting sheet to be connected with one end of the insulating pull rod; the second contact is connected with the movable conducting rod through the flexible connecting sheet; the outgoing conductor is connected with a static conducting rod of the vacuum arc-extinguishing chamber.

5. The normal pressure sealed shielded solid insulation switch cabinet according to claim 3, wherein the incoming conductor and the outgoing conductor are respectively coated with a semiconductor layer; and the periphery of the semiconductor layer is also sleeved with a shielding sleeve.

6. The normal pressure sealed shielded solid insulation switch cabinet according to claim 4, wherein the vacuum interrupter is further coated with a liquid silicone rubber layer at the outer periphery thereof.

7. A switchgear, characterized by comprising a transmission case and the normal pressure sealed and shielded solid insulation switchgear of any one of claims 1 to 6, wherein the normal pressure sealed and shielded solid insulation switchgear comprises three; the normal-pressure sealed shielding type solid insulation switch cabinet is attached to one side wall of the transmission case, a first transmission mechanism is further arranged in the transmission case, and the first transmission mechanism is connected with the isolation disconnecting link in a three-way mode through a through hole formed in an attaching face and drives the isolation disconnecting link to move.

8. The switchgear as claimed in claim 7, wherein when the said normally-closed and shielded solid insulated switchgear cabinet further comprises a circuit breaker assembly, and the said circuit breaker assembly comprises an insulated pull rod, a second transmission mechanism is further provided in the said transmission box, and the said second transmission mechanism connects and actuates the said insulated pull rod through the said through hole.

9. The switchgear device according to claim 7, further comprising a distance sensor and an illuminator, a controller disposed within the transmission case; the transmission case is also provided with an observation window, the illuminator is electrically connected with the controller, and the distance sensor is electrically connected with the controller and arranged on the outer wall of the transmission case; the distance sensor is used for identifying an object in a preset range and sending an identified object signal to the controller; the controller is used for receiving the object signal and sending a control signal to the illuminator; the illuminator is used for receiving the control signal and illuminating the interior of the transmission case.

10. The switchgear as claimed in claim 7, wherein the transmission case includes a transmission case body having an opening, and a cover plate covering the opening, the cover plate being detachably connected to the transmission case body; the three normal-pressure sealed shielding type solid insulation switch cabinets are respectively attached to one side wall of the transmission case body, and the first transmission mechanism is located inside the transmission case body.

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