A switchgear and a built-in sensor thereof

Abstract

This application discloses a switch cabinet and its built-in sensor, relating to the field of electrical equipment technology. By optimizing and improving the structure of the sensor near the moving and stationary contacts in the switch cabinet of the prior art, and adding components for auxiliary ventilation, when an abnormality is detected in the moving and stationary contacts, the sensor housing guides the gas to efficiently dissipate heat from the moving and stationary contacts, slowing down their heating process. This achieves the technical effect that the switch cabinet can automatically perform temporary handling when a potential fault is detected, delay the deterioration of the situation, buy effective time for personnel to handle the situation, thereby reducing the probability of fault occurrence and the severity of accidents, and effectively reducing the economic losses caused by faults.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more particularly to a switch cabinet and its built-in sensor. Background Technology

[0002] High-voltage switchgear using trolley-type or center-mounted circuit breakers often experiences overheating at the moving and stationary contacts between the circuit breaker and the switchgear, affecting the line's load-carrying capacity and potentially leading to switchgear burnout in severe cases. The main causes of high-voltage switchgear contact overheating and switchgear burnout are as follows: inadequate temperature monitoring at the contact position of the moving and stationary contacts, insufficient tension of the fastening springs on the outside of the moving contact, loose connection between the moving contact and the conductive arm, and insufficient insertion depth of the moving and stationary contacts, resulting in poor contact between the moving and stationary contacts of the switchgear.

[0003] To address the aforementioned issues, Chinese invention patent CN115274337B discloses a composite sensor, a comprehensive online monitoring and analysis system and method for switchgear. This system uses multiple sensors (pressure sensor, temperature sensor, insertion depth detection mechanism, power supply mechanism, and related accessories) to comprehensively monitor the tension of the moving contact's clamping spring, the contact temperature, and the insertion depth of the moving and stationary contacts in the switchgear. This allows the monitored data to more accurately reflect the real-time operating status of the equipment. Wireless communication is used to promptly provide information on the circuit breaker's operation, thereby enabling early detection of potential hazards and preventing unnecessary economic losses.

[0004] While the above solution can effectively assist staff in promptly identifying potential hazards and taking timely action, it cannot effectively address the problem temporarily between the discovery of the issue and the arrival of personnel on-site to resolve it, nor can it effectively suppress (delay) the occurrence of accidents. It places extremely high demands on the response speed of the operators. Furthermore, the presence of multiple sensor housings can, to some extent, impair ventilation, exacerbate heat retention, accelerate temperature rise, increase the probability of malfunctions, and shorten the available response time.

[0005] Therefore, there is a need for a switchgear that can automatically perform temporary handling when potential faults are detected, slow down the rate of deterioration, buy time for staff to handle the situation, thereby reducing the probability of faults and the severity of accidents, and effectively reducing the economic losses caused by faults. Summary of the Invention

[0006] This application provides a switch cabinet that solves the technical problems in the prior art where switch cabinets, limited by their own structure, can only monitor the status of moving and stationary contacts through multiple sensors, making it impossible to temporarily handle the problems found and delaying the progression of the fault. Furthermore, the presence of the sensor housing affects ventilation, exacerbating heat retention and shortening the available response time. The solution achieves the technical effect of enabling the switch cabinet to automatically perform temporary handling when potential faults are detected, slowing down the deterioration of the situation, buying effective time for staff to handle the situation, thereby reducing the probability of fault occurrence and the severity of accidents, and effectively reducing the economic losses caused by faults.

[0007] This application provides a switch cabinet, including a cabinet, a circuit breaker, a moving contact positioned on the circuit breaker, a contact box carrying a stationary contact, and a sensor assembly fitted onto the moving contact; the stationary contact is inserted into the moving contact to achieve electrical connection; the sensor assembly plays a role in comprehensively monitoring the tension force of the contact spring, the contact temperature, and the insertion depth of the moving and stationary contacts, as well as communication. The area of ​​the contact box near the moving contact of the plum blossom is a horizontally placed tubular shape that fits over the moving contact of the plum blossom. It also includes gas pipelines and gas pumping assemblies; The contact box is provided with an upper ventilation opening and a lower ventilation opening; The gas transmission pipeline includes an inlet pipe and an outlet pipe; the outlet of the gas pump assembly is connected to the upper ventilation port through the inlet pipe, and the inlet is connected to the lower ventilation port through the outlet pipe. The sensor assembly includes a support housing and a monitoring unit; The supporting shell is sleeved on the plum blossom moving contact and is tubular in shape. It has a top air inlet and a bottom air outlet corresponding to the upper and lower air inlets, and also has multiple side air jets.

[0008] Furthermore, the support housing includes a base carrier housing, a jet housing for jetting, and a suction housing for inhaling air. The basic carrier shell includes a first spliced ​​shell and a second spliced ​​shell; Both the first and second splicing shells are arc-shaped plates, which are fixed together by snap fasteners. After assembly, the whole shell is tubular and is fitted onto the plum blossom moving contact. Multiple strip-shaped limiting strips are fixed on the concave surfaces of both the first and second splicing shells; the limiting strips are made of insulating material, are clamped on the clamping spring of the plum blossom moving contact, and their length direction is the same as the axial direction of the plum blossom moving contact. Multiple arc-shaped grooves that are adapted to the clamping spring on the plum blossom moving contact are provided on the surface near the plum blossom moving contact.

[0009] Furthermore, the jet housing is a rigid hollow ring made of insulating material, which is detachably fixed to the end of the base housing near the circuit breaker by a snap fastener, and is coaxial with the base housing; The jet casing has a top air inlet near the top and multiple side jet ports arranged in a ring on one side. The top air inlet is a vertically arranged through hole used to receive gas from the top vent. After the gas from the top vent is introduced into the jet housing, it is ejected from the side jet port.

[0010] Furthermore, the air intake shell is used to guide airflow into the lower ventilation opening. It is a hollow ring made of rigid insulating material and can be detachably fixed to the end of the base housing away from the circuit breaker by a snap fastener, and is coaxial with the base housing. The inner ring of the air intake shell is provided with an annular through groove, and the bottom is provided with a bottom air outlet; The annular groove is an annular groove that connects the inner and outer spaces of the air intake shell; the gas discharged from the bottom air outlet enters the exhaust pipe through the lower ventilation port. After the stationary contact is inserted into the plum blossom moving contact, the inner protrusion is close to the top air inlet and the bottom air outlet, and the top air inlet and the bottom air outlet are connected to the upper ventilation port and the lower ventilation port, respectively.

[0011] Furthermore, both the upper and lower vents are vertically oriented through holes that serve as gas passages, with a diameter of less than 12 mm, and are located directly above and below the plum blossom moving contact, respectively. The inner wall of the contact box is also provided with two inner protrusions. The inner protrusions are non-metallic protrusions on the inner wall of the contact box, located close to the sensor assembly, and are penetrated by the upper ventilation port and the lower ventilation port respectively.

[0012] Furthermore, a gas treatment component is provided on the gas delivery pipeline of the gas pumping assembly; the gas treatment component performs cooling, dust removal and / or dehumidification operations on the gas that needs to be pumped into the inlet pipe.

[0013] Preferably, it also includes a heat pipe system; All corners of the main intake pipe are rounded. The exhaust pipe has multiple branch pipes, some of which are connected to the sensor assembly, and some of which extend into each compartment inside the cabinet. The exhaust pipe is connected to each compartment inside the cabinet through its own branch pipes. The heat dissipation pipe system includes a first reel, a second reel, a gas delivery hose, multiple guide pipes, and a gas input assembly; The first and second reels are positioned inside the cabinet and are controlled to wind up and release the gas delivery hose. The gas delivery hose is a non-metallic hose, with its two ends wound and positioned on a first and a second reel, respectively, and multiple vent holes are positioned on it. The guide tube is used to guide the gas delivery hose to move and change the position of the vent inside the cabinet; part of the guide tube passes through the partition of the cabinet compartment; The gas delivery hose runs through each guide tube; The gas input component is used to pump gas into the gas delivery hose through one or more vents on the gas delivery hose, causing gas to be ejected from the other vents.

[0014] Preferably, the gas input component is tubular in shape, fixed inside the cabinet and sleeved on the gas delivery hose, including a base pipe and two connecting pipes; The base pipe is a rigid pipe with an inner diameter 1 to 2 millimeters larger than the diameter of the gas delivery hose; An air inlet is provided on the inner wall of the basic pipe body; The inflation groove is an annular groove, located near the middle of the base pipe, and is connected to the air outlet of the air pump assembly through one of the connecting pipes. Two air intake grooves are also provided on the inner wall of the basic pipe body; The air intake groove is an annular groove located above and below the air filling groove. The two are connected to the air inlet of the air pump assembly through another connecting pipe. It is used to open the air delivery hose and fix it to the inner wall of the base pipe by air intake.

[0015] Preferably, limit magnets are positioned on the side walls of the curved guide tube; The limiting magnet is a permanent magnet; The gas delivery hose also has a built-in tube support bead; The support bead is a hollow ferromagnetic bead that corresponds one-to-one with the limiting magnet. It is always located inside the gas delivery hose and is attracted to the space enclosed by the guide tube under the influence of magnetic force.

[0016] A sensor built into a switchgear, the sensor being a sensor assembly; the sensor assembly includes a supporting housing and a monitoring unit; The supporting shell includes a base carrier shell, a jet shell for jetting, and a suction shell for inhaling. The basic carrier shell includes a first spliced ​​shell and a second spliced ​​shell; Both the first and second splicing shells are arc-shaped plates, which are fixed together by snap fasteners. After assembly, the whole shell is tubular and is fitted onto the plum blossom moving contact. Multiple strip-shaped limiting strips are fixed on the concave surfaces of both the first and second splicing shells. The limiting strips are made of insulating material, and their length direction is the same as the axial direction of the plum blossom moving contact. Multiple arc-shaped grooves that match the clamping spring on the plum blossom moving contact are provided on the surface near the plum blossom moving contact. After the first and second splicing shells are spliced ​​together, the combination of the two is restricted on the plum blossom moving contact because the limiting strips are stuck on the clamping spring of the plum blossom moving contact.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: By optimizing and improving the structure of the sensors near the moving and stationary contacts in the existing switchgear, and adding components to assist ventilation, the sensor housing guides the gas when an abnormality is detected, efficiently dissipating heat from the moving and stationary contacts and slowing down their heating process. This effectively solves the technical problems in the existing switchgear, which, due to its own structural limitations, can only monitor the status of moving and stationary contacts through multiple sensors, making it impossible to temporarily handle the detected problems and delaying the progression of the fault. Furthermore, the presence of the sensor housing affects ventilation, exacerbating heat retention and shortening the available response time. As a result, the switchgear can automatically perform temporary handling when potential faults are detected, slowing down the deterioration of the situation, buying effective time for personnel to handle the situation, thereby reducing the probability of fault occurrence and the severity of accidents, and effectively reducing the economic losses caused by faults. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the positional relationship between the circuit breaker, contact box, and gas pipeline. Figure 2 This is a schematic diagram showing the positional relationship between the sensor assembly and the moving contact of the circuit breaker. Figure 3 This is a schematic diagram of the sensor assembly. Figure 4 This is an exploded view of the sensor assembly. Figure 5 This is a cross-sectional view of the sensor assembly; Figure 6 This is a schematic diagram showing the positional relationship between the gas pipeline and the contact box. Figure 7 This is a simplified diagram of the internal structure of the switchgear. Figure 8 This is a schematic diagram of the heat pipe system. Figure 9 This is a schematic diagram showing the connection relationship between the heat dissipation pipe system, the air supply pipes, and the contact box; Figure 10 Here is a simplified structural diagram of the gas input component; Figure 11 This is a schematic diagram of the external structure of a gas delivery hose. Figure 12 A simplified diagram showing the positional relationship between the basic hose and the elastic tube; Figure 13 This is a simplified diagram showing the positional relationship between the guide tube and the gas delivery hose.

[0019] In the picture: Circuit breaker 001, plum blossom moving contact 011, contact box 002, inner protrusion 021, upper vent 022, lower vent 023, air inlet pipe 030, main pipe 031, branch pipe 032, exhaust pipe 040, air pump assembly 004, base housing 110, first splicing housing 111, second splicing housing 112, limit strip 113, jet housing 120, top air inlet 121, side jet outlet 122. Air intake shell 130, bottom air outlet 131, annular through groove 132, first drum 210, second drum 220, air supply hose 230, vent hole 231, base hose 232, elastic tube 233, guide tube 240, base tube 241, end guide body 242, limiting magnet 243, support tube bead 244, base tube body 251, air intake groove 252, air filling groove 253, connecting tube body 254. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0021] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example 1

[0024] like Figures 1 to 7 As shown, the switch cabinet of this application includes a cabinet, a circuit breaker 001, a stylus moving contact 011 positioned on the circuit breaker 001, a contact box 002 carrying a stationary contact, an air supply pipe, an air pump assembly 004, and a sensor assembly mounted on the stylus moving contact 011.

[0025] The cabinet serves as a load-bearing support; the stationary contact is inserted into the plum blossom moving contact 011 to achieve electrical connection; the sensor assembly located at the plum blossom moving contact 011 plays a role in comprehensively monitoring the tension of the contact spring, the contact temperature, and the insertion depth of the moving and stationary contacts, as well as communication. This is existing technology, and for details, please refer to the Chinese invention patent published with authorization announcement number CN115274337B.

[0026] The area of ​​the contact box 002 near the plum blossom moving contact 011 is a horizontally placed tubular shape, which is fitted onto the plum blossom moving contact 011; the contact box 002 is provided with an upper ventilation port 022 and a lower ventilation port 023; The upper vent 022 and lower vent 023 are both vertically oriented through holes that serve as gas channels. They have a diameter of less than 12 mm and are located directly above and below the plum blossom moving contact 011, respectively. The inner wall of the contact box 002 is also provided with two inner protrusions 021. The inner protrusions 021 are non-metallic protrusions on the inner wall of the contact box 002, located close to the sensor assembly. There are two of them, and they are penetrated by the upper vent 022 and the lower vent 023, respectively. The inner protrusions 021 serve to guide the airflow, ensuring that most of the airflow input to the contact box 002 is guided to the space between the sensor assembly and the plum blossom moving contact 011.

[0027] The main body of the gas pipeline is tubular, serving to transport gas flow. The gas supply pipeline includes an inlet pipe 030 and an exhaust pipe 040; the inlet pipe 030 connects one of the outlets of the pumping assembly 004 to the upper vent 022, and the exhaust pipe 040 connects one of the inlets of the pumping assembly 004 to the lower vent 023.

[0028] The air pump assembly 004 is a combination of an air pump, an air valve, and an air delivery pipeline. It is positioned on the cabinet and operates under control, serving to promote gas circulation through pumping.

[0029] like Figures 3 to 5 As shown, the sensor assembly includes a support housing and a monitoring unit; The supporting shell is sleeved on the plum blossom moving contact 011 and serves to bear and support the load. The monitoring unit includes multiple sensors, which are positioned on the support housing and located between the support housing and the plum blossom moving contact 011. They are used to comprehensively monitor the tension force of the clamping spring of the contact, the contact temperature, and the insertion depth of the moving and stationary contacts. This is existing technology and will not be described in detail here. The supporting shell includes a base carrier shell 110, a jet shell 120, and an intake shell 130; The basic carrier shell 110 is tubular in shape and includes a first splicing shell 111 and a second splicing shell 112; The first splicing shell 111 and the second splicing shell 112 are both arc-shaped plates. They are fixed together by snap fasteners. After assembly, the whole is tubular and is sleeved on the plum blossom moving contact 011. Multiple strip-shaped limiting strips 113 are fixed on the concave surfaces of both the first splicing shell 111 and the second splicing shell 112. The limiting strips 113 are made of insulating material, and their length direction is the same as the axial direction of the plum blossom moving contact 011. Multiple arc-shaped grooves adapted to the clamping spring on the plum blossom moving contact 011 are provided on the surface near the plum blossom moving contact 011. After the first splicing shell 111 and the second splicing shell 112 are spliced ​​together, the combination of the two is restricted on the plum blossom moving contact 011 because the limiting strips 113 are stuck on the clamping spring of the plum blossom moving contact 011 (only stuck, not tightened, and will not restrict the movement of the plum blossom moving contact 011 when inserting or removing the stationary contact). The jet housing 120 is a rigid hollow ring made of insulating material. It is detachably fixed to the end of the base housing 110 near the circuit breaker 001 by a snap fastener and is coaxial with the base housing 110. The jet housing 120 has a top air inlet 121 near the top and multiple side jet ports 122 arranged in a ring on one side. The top air inlet 121 is a vertically arranged through hole used to receive gas from the upper ventilation port 022. After the gas from the upper ventilation port 022 is introduced into the jet housing 120, it is ejected from the side jet ports 122. The side jet ports 122 spray gas toward the finger gap of the plum blossom moving contact 011. The intake shell 130 is used to guide airflow into the lower ventilation port 023. It is a hollow ring made of rigid insulating material and can be detachably fixed to the end of the base housing 110 away from the circuit breaker 001 by a snap fastener. It is coaxial with the base housing 110. The inner ring of the intake shell 130 is provided with an annular through groove 132 and the bottom is provided with a bottom air outlet 131. The annular through groove 132 is an annular groove that connects the inner and outer spaces of the intake shell 130. The gas discharged from the bottom air outlet 131 enters the exhaust pipe 040 through the lower ventilation port 023. After the stationary contact is inserted into the plum blossom moving contact 011, the inner protrusion 021 is close to the top air inlet 121 and the bottom air outlet 131. The top air inlet 121 and the bottom air outlet 131 are respectively connected to the upper ventilation port 022 and the lower ventilation port 023.

[0030] Furthermore, both the intake pipe 030 and the exhaust pipe 040 include a main pipe 031 and a branch pipe 032. The number of main pipes 031 is one, and the number of branch pipes 032 is multiple. The branch pipes 032 are positioned on the main pipe 031. The main pipe 031 is connected to the air pumping assembly 004, and the branch pipes 032 are connected to multiple sensor assemblies (multiple sensor assemblies on multiple plum blossom moving contacts 011).

[0031] Furthermore, the gas supply pipeline of the gas pumping assembly 004 is equipped with a gas treatment component; the gas treatment component performs cooling, dust removal and / or dehumidification operations on the gas that needs to be pumped into the inlet pipe 030; the gas treatment component is prior art and will not be described in detail here.

[0032] Preferably, the gas treatment component also has the function of dissipating heat from the flowing gas. The gas discharged from the exhaust pipe 040 is cooled by the gas treatment component and then enters the intake pipe 030 by the air pump. The gas treatment component is prior art and will not be described in detail here.

[0033] When the switchgear of this application embodiment is used: Under normal conditions, the air pump assembly 004 is not running or is running continuously under low load. The sensor assembly comprehensively monitors the tension of the clamping spring of the contact, the contact temperature, and the insertion depth of the moving and stationary contacts (the purpose of the air pump assembly 004 not running or running continuously under low load is to ensure the stability and authenticity of the temperature data detected by the sensor assembly, and to ensure that abnormal temperature rise at the contact position can be detected in a timely manner). When an abnormal contact position is detected (abnormal contact spring tension, contact temperature, and insertion depth of moving and stationary contacts), the staff is notified, and the air pump assembly 004 is controlled to operate at high load to quickly dissipate heat from the sensor assembly and the contact positions of the moving and stationary contacts. The gas enters the top air inlet 121 through the air inlet pipe 030 and is ejected from the side air outlet 122. It flows through the finger gap to dissipate heat from the contact positions of the contacts, and then enters the suction shell 130 through the annular through groove 132. Finally, it enters the exhaust pipe 040 through the bottom air outlet 131 and is discharged.

[0034] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This invention solves the technical problems in existing switchgear that, due to its structural limitations, it can only monitor the status of moving and stationary contacts through multiple sensors, which makes it impossible to temporarily handle the problems found and delays the progression of the fault. Furthermore, the presence of the sensor housing affects ventilation, which exacerbates heat retention and shortens the available response time. The invention achieves the technical effect of enabling the switchgear to automatically perform temporary handling when potential faults are detected, slowing down the deterioration of the situation, buying effective time for personnel to handle the situation, thereby reducing the probability of fault occurrence and the severity of accidents, and effectively reducing the economic losses caused by faults.

[0035] Example 2

[0036] To further enhance the practicality of this application, a set of air pump assembly 004 is used to create diverse and selectable internal heat dissipation effects, comprehensively ensuring both normal and targeted heat dissipation within the switchgear, such as... Figures 8 to 10As shown, this application embodiment optimizes and improves the structure of the gas transmission pipeline based on the above embodiment, and adds a heat dissipation pipe system to assist in the efficient heat dissipation within the cabinet, specifically: like Figure 8 and Figure 9 As shown, the main pipe 031 of the intake pipe 030 is generally S-shaped, U-shaped, wavy, etc., and the corners are all rounded. The exhaust pipe 040 has multiple branch pipes 032, some of which are connected to the sensor assembly, and some of which extend into each compartment inside the cabinet. The exhaust pipe 040 is connected to each compartment inside the cabinet through its own branch pipes 032. The heat dissipation pipe system includes a first reel 210, a second reel 220, a gas delivery hose 230, multiple guide pipes 240, and a gas input assembly; The first reel 210 and the second reel 220 are both reel structures, positioned inside the cabinet, with built-in motors, which control the winding and unwinding of the gas delivery hose 230, thereby driving the gas delivery hose 230 to move. The gas delivery hose 230 is a non-metallic hose, with both ends wound and positioned on the first reel 210 and the second reel 220 respectively; the length of the gas delivery hose 230 wound on the first reel 210 and the second reel 220 is more than twice the length of the exposed gas delivery hose 230. like Figure 11 As shown, the gas delivery hose 230 has multiple vent holes 231 positioned on it, and the vent holes 231 are through holes; The guide tube 240 is a rigid non-metallic tube used to guide the gas delivery hose 230 to move and change the position of the vent 231 inside the cabinet. It has various specifications, including straight and curved ones; some of the guide tubes 240 penetrate the partition of the cabinet compartment. The gas delivery hose 230 passes through each guide pipe 240 in sequence and then travels between the compartments inside the cabinet under the guidance of the guide pipe 240; like Figure 10 As shown, the gas input assembly is used to pump gas into the gas supply hose 230 through one or more vents 231 on the gas supply hose 230 so that gas is ejected from the other vents 231. The gas input assembly is tubular in shape, fixed inside the cabinet and fitted onto the gas delivery hose 230. It includes a base pipe 251 and two connecting pipes 254. The base pipe 251 is a rigid pipe with an inner diameter similar to, but 1 to 2 millimeters larger than, the diameter of the gas delivery hose 230. An inflation groove 253 is provided on the inner wall of the base pipe 251. The inflation groove 253 is an annular groove located near the center of the base pipe 251, and is connected to one of the connecting pipes 254. 54 is connected to the air outlet of the air pump assembly 004; the inner wall of the base pipe 251 is also provided with two air intake grooves 252; the air intake grooves 252 are annular grooves, located above and below the inflation groove 253 respectively, and the two are connected to the air inlet of the air pump assembly 004 through another connecting pipe 254, which is used to open the air delivery hose 230 by air intake and fix it to the inner wall of the base pipe 251 to prevent it from being blown flat when the inflation groove 253 blows air into the air delivery hose 230; The heat dissipation pipe system has at least two states; in one state (normal state), most of the vent holes 231 of the air supply hose 230 are exposed, and the other vent holes 231, except those covered by the gas input component, correspond one-to-one with the branch pipes 032 of the air inlet pipe 030 to supply air to the branch pipes 032 of the air inlet pipe 030; the exposed vent holes 231 are used for targeted air blowing to dissipate heat in areas with poor air circulation and areas prone to heat generation in each compartment of the cabinet; the gas inside the cabinet is discharged through the exhaust pipe 040; In another state (emergency state), the gas supply hose 230 is exposed without vent holes 231. Except for the vent holes 231 which are covered by the gas input components, the vent holes 231 correspond one-to-one with the branch pipes 032 of the air inlet pipe 030, supplying air to the branch pipes 032 of the air inlet pipe 030; the vent holes 231 are concentrated at the contact position for heat dissipation by blowing air; the gas inside the cabinet is discharged through the exhaust pipe 040. When a contact problem is detected, the first reel 210 and the second reel 220 of the control heat dissipation pipe system are rotated to replace the exposed air supply hose 230 and switch to emergency mode.

[0037] Preferably, the cabinet is completely enclosed, with only the air pump assembly 004 connected to the outside, thus ensuring the airtightness of the switch cabinet.

[0038] Furthermore, such as Figure 8 As shown, the guide tube 240 includes a base tube 241 and an end guide body 242; the base tube 241 is a rigid straight rod or a rigid bent rod; the end guide body 242 is a trumpet-shaped tube body, positioned at both ends of the base tube 241 or integrally formed with the base tube 241, used to guide the gas delivery hose 230 and reduce its wear.

[0039] Preferred, such as Figure 12As shown, the gas delivery hose 230 is composed of multiple elastic tubes and multiple non-elastic tubes spliced ​​together, including a base hose 232 and an elastic tube 233; the base hose 232 is a non-elastic hose, and the elastic tube 233 is an elastic hose; all the vents 231 are located on the elastic tube 233; when the elastic tube 233 enters the air inlet pipe 030 and exhausts gas outward, it expands under the action of air pressure and then tightly adheres to the inner wall of the air inlet pipe 030, thereby reducing gas loss.

[0040] Preferred, such as Figure 13 As shown, to prevent the gas delivery hose 230 from twisting and affecting airflow when passing through the curved guide tube 240, limit magnets 243 are positioned on the side walls of the curved guide tube 240. The limit magnets 243 are permanent magnets. The gas delivery hose 230 also has a tube support bead 244 inside. The tube support bead 244 is a hollow ferromagnetic bead that corresponds one-to-one with the limit magnets 243. It is always located inside the gas delivery hose 230 and is attracted to the space enclosed by the guide tube 240 under the influence of magnetic force. It is used to prevent the gas delivery hose 230 from twisting and to ensure gas flow.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A switch cabinet, comprising a cabinet body, a circuit breaker (001), a moving contact (011) positioned on the circuit breaker (001), a contact box (002) carrying a stationary contact, and a sensor assembly fitted onto the moving contact (011); the stationary contact is inserted into the moving contact (011) to achieve electrical connection; the sensor assembly serves to comprehensively monitor the tension force of the contact spring, the contact temperature, and the insertion depth of the moving and stationary contacts, as well as to provide communication functionality; The area of ​​the contact box (002) near the plum blossom moving contact (011) is a horizontally placed tubular shape, fitted onto the plum blossom moving contact (011); its characteristic is: It also includes gas pipelines and gas pumping assemblies (004); The contact box (002) is provided with an upper vent (022) and a lower vent (023); The gas transmission pipeline includes an inlet pipe (030) and an exhaust pipe (040); the outlet of the gas pump assembly (004) is connected to the upper vent (022) through the inlet pipe (030), and the inlet is connected to the lower vent (023) through the exhaust pipe (040); The sensor assembly includes a support housing and a monitoring unit; The supporting shell is sleeved on the plum blossom moving contact (011) and is tubular in shape. It is provided with a top air inlet (121) and a bottom air outlet (131) corresponding to the upper vent (022) and the lower vent (023), and is also provided with multiple side air jets (122).

2. The switchgear as described in claim 1, characterized in that: The supporting housing includes a base carrier (110), a jet housing (120) for jetting, and a suction housing (130) for inhaling. The base carrier shell (110) includes a first splicing shell (111) and a second splicing shell (112); The first splicing shell (111) and the second splicing shell (112) are both arc-shaped plates. They are fixed together by snap fasteners. After assembly, the whole is tubular and is sleeved on the plum blossom moving contact (011). Multiple strip-shaped limiting strips (113) are fixed on the concave surfaces of the first splicing shell (111) and the second splicing shell (112); the limiting strips (113) are made of insulating material and are clamped on the clamping spring of the plum blossom moving contact (011). The length direction is the same as the axial direction of the plum blossom moving contact (011), and multiple arc-shaped grooves that are adapted to the clamping spring on the plum blossom moving contact (011) are provided on the surface near the plum blossom moving contact (011).

3. The switchgear as described in claim 2, characterized in that: The jet housing (120) is a rigid hollow ring made of insulating material. It is detachably fixed to the end of the base housing (110) near the circuit breaker (001) by a snap fastener and is coaxial with the base housing (110). The jet housing (120) has a top air inlet (121) near the top and multiple side jet ports (122) arranged in a ring on one side; The top air inlet (121) is a vertically arranged through hole used to receive gas from the upper vent (022). After the gas from the upper vent (022) is introduced into the jet housing (120), it is ejected from the side jet port (122).

4. The switchgear as described in claim 3, characterized in that: The air intake shell (130) is used to guide airflow into the lower ventilation port (023). It is a hollow ring made of rigid insulating material and can be detachably fixed to the end of the base housing (110) away from the circuit breaker (001) by a buckle. It is coaxial with the base housing (110). The inner ring of the air intake shell (130) is provided with an annular through groove (132), and the bottom is provided with a bottom air outlet (131); The annular through groove (132) is an annular groove that connects the inner and outer spaces of the air intake shell (130); the gas discharged from the bottom air outlet (131) enters the exhaust pipe (040) through the lower ventilation port (023); After the stationary contact is inserted into the plum blossom moving contact (011), the inner protrusion (021) is close to the top air inlet (121) and the bottom air outlet (131), and the top air inlet (121) and the bottom air outlet (131) are respectively connected to the upper ventilation port (022) and the lower ventilation port (023).

5. The switchgear as described in claim 1, characterized in that: The upper vent (022) and lower vent (023) are both vertical through holes that serve as gas passages. They have a diameter of less than 12 mm and are located directly above and below the plum blossom moving contact (011), respectively. The inner wall of the contact box (002) is also provided with two inner protrusions (021). The inner protrusions (021) are non-metallic protrusions on the inner wall of the contact box (002), which are located close to the sensor assembly and are penetrated by the upper ventilation port (022) and the lower ventilation port (023) respectively.

6. The switchgear as described in claim 1, characterized in that: The gas pumping assembly (004) is equipped with a gas processing component on its gas delivery pipeline; the gas processing component performs cooling, dust removal and / or dehumidification operations on the gas that needs to be pumped into the inlet pipe (030).

7. The switchgear as described in any one of claims 1 to 6, characterized in that: It also includes the heat pipe system; The corners of the main pipe (031) of the intake pipe (030) are all rounded. The exhaust pipe (040) has multiple branch pipes (032), some of which are connected to the sensor assembly, and some of which extend into each compartment inside the cabinet. The exhaust pipe (040) is connected to each compartment inside the cabinet through its own branch pipes (032). The heat dissipation pipe system includes a first reel (210), a second reel (220), a gas delivery hose (230), multiple guide pipes (240), and a gas input assembly; The first reel (210) and the second reel (220) are positioned inside the cabinet and are controlled to wind up and release the gas delivery hose (230); The gas delivery hose (230) is a non-metallic hose, with both ends wound and positioned on the first drum (210) and the second drum (220) respectively, and multiple vent holes (231) are positioned on it; The guide tube (240) is used to guide the gas delivery hose (230) to move and change the position of the vent (231) inside the cabinet; part of the guide tube (240) passes through the partition of the cabinet compartment; The gas delivery hose (230) passes through each guide tube (240); The gas input assembly is used to pump gas into the gas supply hose (230) through one or more vents (231) on the gas supply hose (230) so that gas is ejected from the other vents (231).

8. The switchgear as described in claim 7, characterized in that: The gas input component is tubular in shape, fixed inside the cabinet and sleeved on the gas delivery hose (230), including a base pipe (251) and two connecting pipes (254); The base pipe (251) is a rigid pipe with an inner diameter 1 to 2 mm larger than the diameter of the gas delivery hose (230); The inner wall of the base tube (251) is provided with an air inlet (253); The inflation groove (253) is an annular groove, located near the middle of the base pipe (251), and is connected to the air outlet of the air pump assembly (004) through one of the connecting pipes (254). The inner wall of the basic pipe body (251) is also provided with two air intake grooves (252); The air intake groove (252) is an annular groove located above and below the air filling groove (253). The two are connected to the air inlet of the air pump assembly (004) through another connecting pipe (254) to open and fix the air delivery hose (230) to the inner wall of the base pipe (251) by air intake.

9. The switchgear as described in claim 7, characterized in that: Limit magnets (243) are positioned on the side walls of the curved guide tube (240); The limiting magnet (243) is a permanent magnet; The gas delivery hose (230) also has a built-in support bead (244); The tube support bead (244) is a hollow ferromagnetic bead that corresponds one-to-one with the limiting magnet (243). It is always located inside the gas delivery hose (230) and is attracted to the space enclosed by the guide tube (240) under the influence of magnetic force.

10. A sensor built into a switchgear, characterized in that: The switchgear has built-in sensors, which are sensor assemblies; the sensor assembly includes a supporting housing and a monitoring unit. The supporting housing includes a base carrier (110), a jet housing (120) for jetting, and a suction housing (130) for inhaling. The base carrier shell (110) includes a first splicing shell (111) and a second splicing shell (112); The first splicing shell (111) and the second splicing shell (112) are both arc-shaped plates. They are fixed together by snap fasteners. After assembly, the whole is tubular and is sleeved on the plum blossom moving contact (011). Multiple strip-shaped limiting strips (113) are fixed on the concave surfaces of the first splicing shell (111) and the second splicing shell (112); the limiting strips (113) are made of insulating material, and their length direction is the same as the axial direction of the plum blossom moving contact (011). Multiple arc-shaped grooves that are adapted to the clamping spring on the plum blossom moving contact (011) are provided on the surface near the plum blossom moving contact (011); after the first splicing shell (111) and the second splicing shell (112) are spliced ​​together, the combination of the two is restricted on the plum blossom moving contact (011) because the limiting strips (113) are stuck on the clamping spring of the plum blossom moving contact (011).

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