Novel gas-insulated switchgear and method

Abstract

The invention provides a novel gas-insulated switchgear and a method, and belongs to the technical field of electrical control. The novel inflatable cabinet comprises a cabinet body and C-shaped outer conical sleeves arranged on the cabinet body, the C-shaped outer conical sleeves are divided into two groups, the two groups of C-shaped outer conical sleeves are installed on the side face of the cabinet body, one group of C-shaped outer conical sleeves are located above the other group of C-shaped outer conical sleeves, and the two groups of C-shaped outer conical sleeves are arranged in a staggered mode; the cabinet body is further provided with a transformer outgoing line sleeve, the transformer outgoing line sleeve is arranged at the upper end of the cabinet body, and the transformer outgoing line sleeve is used for being connected with a transformer through a cable; and the two groups of C-shaped outer conical sleeves are distributed up and down in a staggered manner, so that normal connection of cables is ensured, and mutual interference is reduced. In actual use, one group of C-shaped outer conical sleeves in a traditional cable chamber is changed into two groups of sleeves on the side surfaces, and the two groups of sleeves are arranged in a staggered manner, so that normal connection of cables can be ensured, and mutual interference is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a novel inflatable cabinet and method. Background Art

[0002] The gas-filled cabinet is a new generation of switchgear, i.e., indoor AC high-voltage gas-insulated metal-enclosed switchgear. The main switch can use either a permanent magnetic mechanism vacuum circuit breaker or a spring mechanism vacuum circuit breaker. The whole cabinet adopts a combination of air insulation and sulfur hexafluoride gas compartment, and has the following characteristics: compact structure, easy expansion, and suitable for distribution automation. The cabinet has a solid structure and good air tightness. Each functional unit is an independent module and easy to assemble. It is equipped with an independent pressure relief channel to maximize personal safety and equipment operation.

[0003] There are three types of main busbars for inflatable cabinets: top connection, side connection, and on-site busbar connection with vacuum inflating. In terms of manufacturing and installation process requirements, on-site busbar connection is easy to achieve, followed by top connection, and side connection has the highest requirements; in terms of cost, on-site busbar connection has the lowest cost, followed by side connection, and top connection has the highest requirements; in terms of product quality control, top connection is the best, followed by side connection, and on-site busbar connection has the lowest cost.

[0004] In the new energy Huabian project, the high-voltage switchgear mostly uses a 35kV sulfur hexafluoride gas-filled cabinet with a rated current of 630A. Because the main use scenarios of the new energy Huabian project are photovoltaic and wind farms, due to the particularity of photovoltaic and wind power, it is usually necessary to connect multiple incoming cables to one high-voltage switchgear. At present, it is necessary to meet the installation and use requirements of 3 incoming cables and 1 set of lightning arresters at most. However, conventional 630A sulfur hexafluoride gas-filled cabinets can only be equipped with a set of C-type outer cone bushings in the cable room, which cannot meet the installation and use requirements of 3 incoming cables and 1 set of lightning arresters.

[0005] In addition, the inflatable cabinets in the prior art have the following deficiencies in actual use: the traditional switchgear skeleton structure has no independent ventilation channel, resulting in poor heat dissipation effect of the inflatable cabinet; the compartment casing in the inflatable cabinet in the prior art is usually overlapped with the conductor in a plane; the plane overlap has a large overlap loop resistance, which is not convenient for adjusting the position of the conductor. The grounding of the traditional inflatable cabinet is generally achieved by a primary grounding bar, and the completion of the relevant test can only be done by applying voltage or current from the cable casing, which makes the test very inconvenient. Summary of the invention

[0006] The purpose of the present invention is to provide a new type of inflatable cabinet and method. In actual use, the present invention effectively solves the technical problem that the inflatable cabinet in the prior art cannot meet the installation and use requirements of 3-way incoming cables and 1 set of lightning arresters. At the same time, it can also effectively solve the technical problem that the heat dissipation performance of the inflatable cabinet in the prior art is poor.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A novel inflatable cabinet comprises a cabinet body and a C-shaped outer cone sleeve arranged on the cabinet body, wherein the C-shaped outer cone sleeve is divided into two groups, both groups of C-shaped outer cone sleeves are installed on the side of the cabinet body, one group of C-shaped outer cone sleeves is located above the other group of C-shaped outer cone sleeves, and both groups of C-shaped outer cone sleeves are staggered; The cabinet is also provided with a transformer outlet bushing, which is arranged at the upper end of the cabinet and is used to connect to the transformer through cables. Two groups of C-shaped outer cone bushings are distributed up and down and arranged in an alternating manner to ensure normal connection of the cables and reduce mutual interference.

[0008] Furthermore, inspection openings are provided on the top and back of the cabinet, and inspection doors are provided at the inspection openings.

[0009] Among them, in some preferred implementation cases, one group of C-type outer cone sleeves installs the first cable and the second cable through the front-plug cable head and the rear-plug cable head, and another group of C-type outer cone sleeves installs the third cable and the lightning arrester through another group of front-plug cable heads and the rear-plug lightning arrester plug.

[0010] Furthermore, a sealing ring is provided at the inspection opening, and the inspection door is in close contact with the sealing ring.

[0011] Furthermore, the sealing ring is an O-ring, and the sealing ring is made of flame-retardant material.

[0012] Furthermore, in some preferred implementation cases, a ventilation base is provided at the bottom of the cabinet, an air duct is provided on the ventilation base, air inlets are provided on the front and rear sides of the cabinet, the air outlet is connected to the air duct, and the air outlet and the air duct form a ventilation channel.

[0013] Furthermore, an induced draft fan is arranged in the air duct to introduce air into the ventilation channel to achieve heat dissipation of the cabinet.

[0014] The cabinet body is composed of multiple air boxes spliced ​​together, and each air box has reinforcing ribs on its side. After the air boxes are spliced ​​together, the reinforcing ribs on adjacent air boxes are staggered, and ventilation holes are provided on the reinforcing ribs.

[0015] Furthermore, a pressure relief device is provided at the bottom of the cabinet.

[0016] Among them, the pressure relief device includes a first buckle plate and a second buckle plate, the first buckle plate is movably connected to the second buckle plate, and a spring is arranged between the first buckle plate and the second buckle plate. The first buckle plate is installed at the air inlet, and a vent is arranged on the first buckle plate.

[0017] Preferably, a sealed vacuum circuit breaker is provided in the cabinet, and a columnar heat sink is provided on the bridging seat connected to the vacuum circuit breaker.

[0018] Furthermore, the switch in the cabinet is connected to the busbar in an overlapping manner, a V-shaped groove is provided on the overlapping conductor of the busbar, and the overlapping conductor of the busbar and the overlapping conductor of the switch are overlapped through the V-shaped groove.

[0019] Among them, a West Tower type radiator is arranged on the cabinet.

[0020] Furthermore, a fan is arranged in the cabinet, and the fan faces the west tower type radiator.

[0021] Preferably, a compartment sleeve is provided in the cabinet, the compartment sleeve comprises a compartment sleeve body and an overlapping portion, and a V-shaped groove is provided on the overlapping portion.

[0022] Furthermore, in actual use, the compartment sleeve is connected to the expandable contact through the spring contact finger.

[0023] Wherein, a cable bushing is arranged on the cabinet, and one end of the cable bushing is connected to the grounding circuit busbar in the cabinet through the grounding bushing.

[0024] Furthermore, in actual use, in order to satisfy the grounding side as a test channel, the specifications of the copper rod connected to the grounding sleeve are consistent with the main circuit busbar, meeting the current carrying capacity requirements.

[0025] In addition, the present invention also discloses a method for setting a new type of C-shaped outer cone sleeve of an inflatable cabinet. The new type of inflatable cabinet is the new type of inflatable cabinet described above, and two groups of C-shaped outer cone sleeves are arranged on the cabinet body in an upper and lower distributed and staggered manner.

[0026] Compared with the prior art, the present invention has the following beneficial effects: The present invention rearranges the position and quantity of the C-shaped outer cone bushings; the C-shaped outer cone bushings are changed to be arranged on the side of the cabinet, and the original one set of bushings is changed to two sets of bushings, which can simultaneously meet the installation and use requirements of 3-way incoming cables and 1 set of lightning arresters. The transformer outlet bushing is designed to the top of the cabinet, from which it is connected to the transformer with a cable; this arrangement eliminates the switch cabinet cable room and reduces the overall height of the cabinet, so the box transformer can also reduce the frame height accordingly, greatly saving the manufacturing cost of the cabinet.

[0027] The present invention adopts a staggered reinforcement rib layout with ventilation holes on the reinforcement ribs. At the same time, the air box structure is constructed. After the air boxes are spliced ​​together, a large space is left between the air boxes, which is conducive to air circulation. The reinforcement ribs with ventilation holes can not only meet the structural strength, but also provide air circulation channels for ventilation and heat dissipation.

[0028] The present invention provides a pressure relief device, which, under the action of the spring, creates a gap between the first gusset plate and the second gusset plate to form an air inlet channel, which not only meets the requirements of ventilation and heat dissipation, but also meets the requirements of preventing arcing splashes from splashing outside the equipment and causing personal injury when the product arcs. When arcing occurs, its impact force presses the top plate downward, thereby closing the device to prevent splashes from spraying out.

[0029] The "line" contact form adopted by the present invention is overlapping. On the overlapping conductor with the busbar, the overlapping surface is processed into a "V"-shaped groove. When the busbar and the conductor of the switch are overlapped, it can be approximately regarded as a "V"-shaped edge overlapping the busbar conductor. This can not only improve the overlapping reliability, but also the V-shaped groove can flow with the gas, thereby improving the heat dissipation capacity of the overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The figure is a schematic diagram of the positional relationship of two groups of C-shaped outer cone sleeves on the cabinet body of the present invention.

[0032] Figure 2 For the present invention Figure 1 main view.

[0033] Figure 3 It is a schematic diagram of the connection relationship between the west tower type radiator and the cabinet of the present invention.

[0034] Figure 4 It is a schematic diagram of the overall structure of the cabinet of the present invention.

[0035] Figure 5 It is a schematic diagram of the overall structure of the pressure relief device of the present invention.

[0036] Figure 6 It is a schematic diagram of the overall structure of the first gusset plate of the present invention.

[0037] Figure 7 It is a schematic diagram of the overall structure of the second gusset plate of the present invention.

[0038] Figure 8 It is a schematic diagram of the installation relationship between the vacuum circuit breaker lap seat and the columnar heat sink of the present invention.

[0039] Fig. 9 It is a schematic diagram of the overall structure of the compartment sleeve of the present invention.

[0040] Fig.10 For the present invention Fig. 9 Front view of .

[0041] Fig.11 The figure is a schematic diagram of the installation relationship between the cable bushing and the cabinet of the present invention.

[0042] Fig.12 This is the state diagram before instantaneous closing before optimization.

[0043] Fig.13 This is the state diagram after instantaneous closing before optimization.

[0044] Fig.14 This is the status diagram before the circuit breaker is closed when the 1SB closing button is stuck.

[0045] Fig.15 This is the status diagram of the circuit breaker after closing when the 1SB closing button is stuck.

[0046] Fig.16 This is the status diagram of the circuit breaker when it is closed for fault protection tripping when the 1SB closing button is stuck.

[0047] Fig.17 This is a diagram of the state before the 1SB closing button of the present invention is closed without adhesion.

[0048] Fig.18 This is a diagram of the state of the 1SB closing button of the present invention after the closing button is not adhered.

[0049] Fig.19 This is a state diagram of the circuit breaker before closing when the 1SB closing button of the present invention is stuck.

[0050] Fig. 20 This is a state diagram of the 1SB closing button adhesion circuit breaker after closing.

[0051] Fig.21 This is a state diagram of the 1SB closing button adhesion circuit breaker after closing.

[0052] Status diagram after protection tripping.

[0053] Fig. 22 This is a diagram showing that the circuit breaker is in an open position state when the circuit breaker is closed due to a fault and performs a tripping action according to the present invention.

[0054] Reference numerals: 101 cabinet, 102 C-type outer cone bushing, 103 transformer outlet bushing, 104 inspection port, 105 inspection door, 106 front cable head, 107 rear cable head, 108 first cable, 109 second cable, 110 third cable, 111 ventilation base, 112 air box, 113 reinforcement ribs, 114 pressure relief device, 115 first buckle plate, 116 second buckle plate, 117 spring, 118 columnar radiator, 119 West Tower radiator, 120 compartment bushing, 121 compartment bushing body, 122 overlap, 123 cable bushing, 124 grounding loop bus, 125 grounding bushing, 126 vacuum circuit breaker. DETAILED DESCRIPTION

[0055] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0056] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0059] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0061] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0062] See also Figure 1-Figure 11 This embodiment discloses a novel inflatable cabinet, including a cabinet 101, and a C-shaped outer cone sleeve 102 arranged on the cabinet 101, wherein the C-shaped outer cone sleeve 102 is divided into two groups, and both groups of C-shaped outer cone sleeves 102 are installed on the side of the cabinet 101, and one group of C-shaped outer cone sleeves 102 is located above the other group of C-shaped outer cone sleeves 102, and both groups of C-shaped outer cone sleeves 102 are staggered; The cabinet 101 is also provided with a transformer outlet bushing 103, which is arranged at the upper end of the cabinet 101 and is used to connect to the transformer through cables; the two groups of C-shaped outer cone bushings 102 are distributed up and down and arranged in an alternating manner to ensure normal connection of the cables and reduce mutual interference.

[0063] In actual use, the present invention changes a group of C-shaped outer cone sleeves 102 in a traditional cable room into two groups arranged on the side, and the two groups of sleeves are arranged alternately to ensure that the cables can be connected normally without mutual interference.

[0064] Furthermore, in some preferred implementation cases, an inspection opening 104 is provided on the top and the back side of the cabinet 101 , and an inspection door 105 is provided at the inspection opening 104 .

[0065] The present application reserves inspection openings 104 on the top and back of the cabinet 101, from which the inside of the gas box 112 can be inspected in case of abnormal conditions or damage.

[0066] Furthermore, in some preferred implementation cases, one group of C-type outer cone sleeves 102 installs the first cable 108 and the second cable 109 through the front-plugged cable head 106 and the rear-plugged cable head 107, and another group of C-type outer cone sleeves 102 installs the third cable 110 and the lightning arrester through another group of front-plugged cable heads 106 and the rear-plugged lightning arrester plug.

[0067] Furthermore, in some preferred implementation cases, a sealing ring is provided at the inspection opening 104, and the inspection door 105 is in close contact with the sealing ring.

[0068] If an abnormal situation or damage occurs, the inspection port 104 can be opened to inspect the inside of the cabinet 101 , and even damaged parts inside the cabinet 101 can be replaced through the inspection port 104 .

[0069] Furthermore, the sealing ring is an O-ring, and the sealing ring is made of flame-retardant material.

[0070] In actual use, two groups of C-shaped outer cone sleeves 102 are arranged on the side, and the distance between each group of sleeves is 220mm; one group of C-shaped outer cone sleeves 102 and the other group of C-shaped outer cone sleeves 102 are arranged 180mm apart up and down, and staggered 110mm front and back to ensure that after the cables are installed, there will be no interference between each group of cables.

[0071] In this application, the position and number of the C-type outer cone bushing 102 are rearranged; the C-type outer cone bushing 102 is changed to the side of the cabinet 101, and the original one set of bushings is changed to two sets of bushings, which can simultaneously meet the installation and use requirements of 3-way incoming cables and 1 set of lightning arresters. The transformer outlet bushing 103 is designed to the top of the cabinet 101, from which it is connected to the transformer with a cable; this arrangement eliminates the cable room of the inflatable cabinet and reduces the height of the inflatable cabinet, so the box transformer can also reduce the frame height accordingly, greatly saving the manufacturing cost of the cabinet.

[0072] Furthermore, in some preferred implementation cases, a ventilation base 111 is provided at the bottom of the cabinet, an air duct is provided on the ventilation base 111, air inlets are provided on the front and rear sides of the cabinet 101, the air outlet is connected to the air duct, and the air outlet and the air duct form a ventilation channel.

[0073] Furthermore, in some preferred implementation cases, an induced draft fan is provided in the air duct to facilitate the introduction of air into the ventilation duct to achieve heat dissipation of the cabinet 101 .

[0074] In actual use, an independent air duct is provided on the ventilation base 111, and the heat dissipation efficiency of the whole equipment is improved under the action of the induced draft fan.

[0075] Furthermore, in some preferred implementation cases, the cabinet 101 is composed of a plurality of air boxes 112 spliced ​​together, and each air box 112 is provided with a reinforcing rib 113 on the side. After the air boxes 112 are spliced ​​together, the reinforcing ribs 113 on adjacent air boxes 112 are staggered, and ventilation holes are provided on the reinforcing ribs 113 .

[0076] The reinforcement ribs 113 provided on the conventional air box 112 are arranged symmetrically. After the air boxes 112 are assembled, the air boxes 112 and the reinforcement ribs 113 are generally close to each other without gaps. In the present application, the staggered reinforcement ribs 113 are arranged, ventilation holes are provided on the reinforcement ribs 113, and the structure of the air box 112 is constructed. After the air boxes 112 are assembled, a large space is left between the air boxes 112, which is conducive to air circulation. The reinforcement ribs 113 with ventilation holes can meet the structural strength and provide air circulation channels for ventilation and heat dissipation.

[0077] Furthermore, in some preferred implementation cases, a pressure relief device 114 is provided at the bottom of the cabinet 101 .

[0078] Among them, the pressure relief device 114 includes a first buckle plate 115 and a second buckle plate 116, the first buckle plate 115 and the second buckle plate 116 are movably connected, and a spring 117 is arranged between the first buckle plate 115 and the second buckle plate 116, the first buckle plate 115 is installed at the air inlet, and a vent is arranged on the first buckle plate 115.

[0079] In actual use, under the action of the spring 117, there is a gap between the first gusset plate 115 and the second gusset plate 116 to form an air inlet channel, which not only meets the requirements of ventilation and heat dissipation, but also meets the requirements of preventing arc splashes from splashing outside the device when the product is arcing, causing personal injury. When arcing occurs, its impact force presses the top plate downward, thereby closing the device to prevent splashes from spraying out.

[0080] In actual use, a clearance hole is provided on the first buckle plate 115, a guide column is provided on the second buckle plate 116, the spring 117 is sleeved on the guide column, the guide column cooperates with the clearance hole, and a limiting portion is provided at the other end of the guide column.

[0081] The relief hole is a countersunk hole.

[0082] Furthermore, in some preferred implementation cases, a sealed vacuum circuit breaker 126 is disposed in the cabinet 101 , and a columnar heat sink 118 is disposed on the bridging seat to which the vacuum circuit breaker 126 is connected.

[0083] In the present application, the columnar heat sink 118 can radiate the heat conducted to the gas in the gas box 112 to form heat exchange, thereby ensuring that the heat dissipation capacity of the product is effectively improved.

[0084] Furthermore, in some preferred implementation cases, the switch in the cabinet 101 is connected to the busbar by overlapping, and a V-shaped groove is provided on the overlapping conductor of the busbar, and the overlapping conductor of the busbar and the overlapping conductor of the switch are overlapped through the V-shaped groove.

[0085] The "line" contact form adopted in this application is overlapping. On the overlapping conductor with the busbar, the overlapping surface is processed into a "V"-shaped groove. When the busbar and the conductor of the switch are overlapped, it can be approximately regarded as a "V"-shaped edge overlapping the busbar conductor. This can not only improve the overlapping reliability, but also the V-shaped groove can flow with the gas, thereby improving the heat dissipation capacity of the overlap.

[0086] Furthermore, in some preferred implementation cases, a theta-shaped radiator 119 is provided on the cabinet 101 .

[0087] In the prior art, the main solution to improve the heat dissipation capacity of the product is to increase the heat dissipation and reduce the main circuit resistance. In terms of heat dissipation, the radiators of some manufacturers are large in size and high in cost. The radiators are welded and spliced, which are prone to welding defects and cause product leakage. The present application adopts the West Tower type radiator 119, which is processed by one-piece extrusion molding, non-welding splicing, and then anodized black; so that the entire product has great advantages in heat dissipation efficiency, installation convenience and cost; at the same time, the heat dissipation size can be set according to needs, which is flexible and lightweight and can meet different heat dissipation needs.

[0088] Furthermore, in some preferred implementation cases, a fan is provided in the cabinet 101 , and the fan faces the west tower type radiator 119 .

[0089] In actual use, the rapid flow of air can further improve the heat dissipation efficiency of the radiator.

[0090] Furthermore, in some preferred implementation cases, a temperature sensor is provided inside the cabinet 101, and the temperature sensor is connected to the fan through a controller. A temperature sensor is provided at a temperature-sensitive part, and the fan is started to assist in heat dissipation when the set temperature threshold is reached, thereby saving energy while meeting the heat dissipation requirements.

[0091] Furthermore, in some preferred implementation cases, a compartment sleeve 120 is provided in the cabinet 101 , and the compartment sleeve 120 includes a compartment sleeve body 121 and an overlapping portion 122 , and a V-shaped groove is provided on the overlapping portion 122 .

[0092] In the prior art, the overlap between the compartment sleeve 120 and the conductor is usually a plane overlap; the plane overlap has a large overlap loop resistance, which is not convenient for adjusting the position of the conductor. The present application adopts the spring 117 finger-touch overlap method to achieve the purpose of double overlap. The double overlap can effectively reduce the loop resistance at the overlap. At the same time, the finger-touch overlap can meet the adjustment of the overlapped conductor while ensuring the effectiveness of the overlap; more importantly, the plane overlap part 122 is processed into a V-shaped groove to further improve the effective overlap between the conductors and reduce the overlap loop resistance.

[0093] Furthermore, in some preferred implementation cases, the compartment sleeve 120 is connected to the expandable contact through the spring 117 contact finger.

[0094] In the prior art, the traditional compartment sleeve 120 generally adopts a single contact mounting seat. The single contact seat has the disadvantage that the rated load current cannot be very large during use. The present application combines the contact fingers to overlap the compartment sleeve 120, and can realize the installation of multiple groups of contacts. The multiple groups of contact groups in the multiple groups of contact mounting seats can effectively improve the load current capacity of the compartment sleeve 120 and the contacts. The expandable contact mounting seat and the compartment sleeve 120 are connected by the spring 117 contact finger, which can meet the adjustment requirements of the contact installation position. In the actual process, while meeting the current carrying capacity, it can also adapt to the assembly accuracy well.

[0095] Furthermore, in some preferred implementation cases, a cable bushing 123 is provided on the cabinet 101 , and one end of the cable bushing 123 is connected to a grounding loop bus 124 in the cabinet 101 through a grounding bushing 125 .

[0096] In actual use of the present application, the grounding loop bus 124 in the cabinet 101 is led out from the cable bushing 123, which can not only complete the switch grounding function, but also serve as an external test port.

[0097] Furthermore, in some preferred implementation cases, in order to satisfy the grounding side as a test channel, the specifications of the copper rod connected to the grounding sleeve 125 are consistent with the main circuit bus, meeting the current carrying capacity requirements.

[0098] In addition, the present invention also discloses a method for setting up a new type of inflatable cabinet C-shaped outer cone sleeve 102. The new type of inflatable cabinet is the new type of inflatable cabinet described above, and two groups of C-shaped outer cone sleeves 102 are set on the cabinet body 101 in an upper and lower distributed and staggered arrangement.

[0099] For further information, see Figure 12-Figure 22 The cabinet is provided with an anti-tripping system for the circuit breaker of the inflatable cabinet, including a closing circuit, an anti-tripping circuit and a microcomputer protection. One end of the closing circuit is connected to the positive pole of the power supply, and the other end is connected to one end of the microcomputer protection. The other end of the microcomputer protection is connected to the negative pole of the power supply. Among them, one end of the anti-tripping circuit is connected to one end of the closing circuit and the positive pole of the power supply, and the other end is connected to the other end of the microcomputer protection and the negative pole of the power supply.

[0100] Furthermore, in the present embodiment, the anti-tripping system further includes a closing button 1SB, one end of the closing button 1SB is connected to the positive pole of the power supply, and the other end of the closing button 1SB is respectively connected to the closing circuit and the anti-tripping circuit.

[0101] Furthermore, in this embodiment, the closing circuit includes an anti-tripping relay FT, a circuit breaker position FW, and an energy storage circuit breaker. The normally closed contacts of the anti-tripping relay FT, the circuit breaker position FW, and the energy storage circuit breaker are connected in sequence, and the other end of the energy storage circuit breaker is connected to one end of the microcomputer protection.

[0102] Furthermore, in the present embodiment, the anti-tripping circuit includes an anti-tripping coil and a circuit breaker in the closed position HW. The normally open contact of the anti-tripping relay FT is connected to one end of the anti-tripping coil, and the other end of the anti-tripping coil is connected to the microcomputer protection and the negative pole of the power supply. The normally open contact of the anti-tripping relay FT is connected to the normally closed contact of the anti-tripping relay FT. One end of the circuit breaker in the closed position HW is connected to one end of the normally open and normally closed contacts of the anti-tripping relay FT, and the other end is connected to the other end of the normally open contact of the anti-tripping relay FT and the anti-tripping coil.

[0103] In actual use, the present invention is achieved by connecting one end of the closing circuit to the positive pole of the power supply, and the other end to one end of the microcomputer protection, and the other end of the microcomputer protection is connected to the negative pole of the power supply; one end of the anti-tripping circuit is connected to one end of the closing circuit connected to the positive pole of the power supply, and the other end is connected to the other end of the microcomputer protection and the negative pole of the power supply. By serially inserting the microcomputer closing permission point logic into the original market electrical design scheme, the normal function of the anti-tripping relay cannot be guaranteed, which may cause hidden dangers to equipment and personal safety. By optimizing the output of the anti-tripping relay and adjusting the anti-tripping circuit point, the normal function of the anti-tripping relay is guaranteed, and the safety of equipment operation and maintenance is guaranteed. The present invention adjusts the anti-tripping circuit node to make it independent of the closing circuit, and its closing permission node cannot disconnect the anti-tripping circuit, thereby ensuring the normal operation of the anti-tripping function and improving the safety performance of the equipment during operation.

[0104] In order to facilitate those skilled in the art to further understand the present invention, the present invention is further described below in conjunction with specific implementation cases.

[0105] Before optimization: 1. Normal 1: 1SB closing button is not adhered, circuit breaker before closing; see Fig.12 , Fig.12To optimize the state before instantaneous closing. At this time, the circuit breaker is in the open position FW (closed point), HW (open point), the spring has stored energy CN (closed point), and the microcomputer protection meets the closing conditions (circuit breaker open position + spring has stored energy) (closed point); the 1SB closing button is instantly operated (the open point changes to the closed point and then returns to the open point), so that the HQ closing coil is instantly energized to close the circuit breaker.

[0106] 2. Normal 2: 1SB closing button is not adhered, the circuit breaker is closed; See also Fig.13 , the circuit breaker is in the closed position FW (open point), HW (closed point), the spring has stored energy CN (open point), and the microcomputer protection does not meet the closing conditions (circuit breaker closed position + spring has not stored energy) (open point).

[0107] 3. Abnormality 1: 1SB closing button sticking, circuit breaker status before closing; See also Fig.14 , Fault 1SB closing button sticking state (closed point): the circuit breaker is in the open position FW (closed point), HW (open point), the spring has stored energy CN (closed point), and the microcomputer protection meets the closing conditions (circuit breaker open position + spring has stored energy) (closed point); because the 1SB closing button is in the sticking state (closed point), the HQ closing coil is energized to close the circuit breaker.

[0108] 4. Abnormality 2: 1SB closing button sticks, circuit breaker status after closing; See also Fig.15 , Fault 1SB closing button sticking state (closed point): the circuit breaker is in the closed position FW (open point), HW (closed point), the spring has not stored energy CN (open point), and the microcomputer protection does not meet the closing conditions (circuit breaker closed position + spring has not stored energy) (open point).

[0109] 5. Abnormal 3, 1SB closing button sticks, after the circuit breaker is closed, after CN energy storage is completed, the circuit breaker is closed due to a fault, and a protection trip is performed; See also Fig.16 , Fault 1SB closing button sticking state (closed point): the circuit breaker is in the open position FW (closed point), HW (open point), the spring has stored energy CN (closed point), and the microcomputer protection meets the closing conditions (circuit breaker open position + spring has stored energy) (closed point), so that the circuit breaker is closed again. Because the FT relay did not receive power during the entire abnormality 1-3, the anti-tripping failed, and the circuit breaker repeated the abnormality 1-3 action, opening and closing an unlimited number of times, threatening the safety of equipment operation and personal safety.

[0110] After optimization using this application: 1. Normal 1:1SB closing button is not adhered, the state before the circuit breaker is closed; Optimize and change the electrical principle design, adjust the anti-tripping circuit node to make it independent of the closing circuit, and its microcomputer protection closing permission node cannot disconnect the anti-tripping circuit to ensure the normal operation of the anti-tripping function.

[0111] See also Fig.17 ,exist Fig.17 In the figure, it is the state before instant closing: the circuit breaker is in the open position FW (closed point), HW (open point), the spring has stored energy CN (closed point), and the microcomputer protection meets the closing conditions (circuit breaker open position + spring has stored energy) (closed point); the 1SB closing button is instantly operated (the open point changes to the closed point and then returns to the open point), so that the HQ closing coil is instantly energized to close the circuit breaker.

[0112] 2. Normal 2: 1SB closing button is not adhered, the circuit breaker is closed; See also Fig.18 , is the state after instantaneous closing: the circuit breaker is in the closed position FW (open point), HW (closed point), the spring has stored energy CN (open point), and the microcomputer protection does not meet the closing conditions (circuit breaker closed position + spring has not stored energy) (open point).

[0113] 3. Abnormality 1: 1SB closing button sticks, circuit breaker status before closing See also Fig.19 , Fault 1SB closing button sticking state (closed point): the circuit breaker is in the open position FW (closed point), HW (open point), the spring has stored energy CN (closed point), and the microcomputer protection meets the closing conditions (circuit breaker open position + spring has stored energy) (closed point); because the 1SB closing button is in the sticking state (closed point), the HQ closing coil is energized to close the circuit breaker.

[0114] 4. Abnormality 2: 1SB closing button sticks, circuit breaker status after closing; See also Fig. 20 , which is the closing button sticking state (closed point) of fault 1SB: the circuit breaker is in the closed position FW (open point), HW (closed point), the spring has not stored energy CN (open point), and the microcomputer protection does not meet the closing conditions (circuit breaker closed position + spring has not stored energy) (open point).

[0115] 5. Abnormality 3: The 1SB closing button is stuck. After the circuit breaker is closed, the spring stores energy. Because the FT relay is energized through the 1SB closing button (closed point) and the circuit breaker is closed (closed point), the FT relay is energized.

[0116] See also Fig.21The figure shows the sticking state of the closing button of fault 1SB (closed point): the circuit breaker is in the closing position FW (open point), HW (closed point), and the spring energy storage CN (closed point). The microcomputer protection does not meet the closing conditions (circuit breaker closed position + spring energy storage) (open point). Because the FT relay is energized, the open point of the anti-tripping circuit FT becomes the closed point, and the closed point of the closing circuit FT becomes the open point. The closing circuit is disconnected, the HQ closing coil is not energized, and the anti-tripping function is started and self-maintained.

[0117] 6. Abnormal 4: 1SB closing button sticks, after the circuit breaker is closed, the spring stores energy, because the FT relay is energized through the 1SB closing button (closed point) and the circuit breaker is closed (closed point), the FT relay is powered, and the anti-tripping circuit is activated. At this time, the circuit breaker is closed to a fault, and the tripping action is performed, and the circuit breaker is in the open position.

[0118] See also Fig. 22 , Fault 1SB closing button sticking state (closed point): the circuit breaker is in the open position FW (closed point), HW (open point), spring energy storage CN (closed point), the microcomputer protection meets the closing conditions (circuit breaker open position + spring energy storage) (closed point), because the FT relay is energized, the anti-tripping circuit FT open point becomes closed point, the closing circuit FT closed point becomes open point, the closing circuit is disconnected, the HQ closing coil is not energized, and the anti-tripping function is started and self-maintained.

[0119] As mentioned above, the electrical design of the present invention in the original market cannot guarantee the normal function of the anti-trip relay after the microcomputer closing permission point logic is serially inserted, which may cause hidden dangers to equipment and personal safety. By optimizing the output of the anti-trip relay and adjusting the anti-trip circuit point, the normal function of the anti-trip relay is guaranteed, and the safety of equipment operation and maintenance is guaranteed.

[0120] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of inflatable cabinet, including a cabinet body, characterized in that: It also includes a C-shaped outer cone sleeve arranged on the cabinet body, wherein the C-shaped outer cone sleeve is divided into two groups, both groups of C-shaped outer cone sleeves are installed on the side of the cabinet body, one group of C-shaped outer cone sleeves is located above the other group of C-shaped outer cone sleeves, and both groups of C-shaped outer cone sleeves are staggered; The cabinet is also provided with a transformer outlet bushing, which is arranged at the upper end of the cabinet and is used to connect to the transformer through cables. Two groups of C-shaped outer cone bushings are distributed up and down and arranged in an alternating manner to ensure normal connection of the cables and avoid interference between the cables.

2. A novel inflatable cabinet according to claim 1, characterized in that: Inspection openings are arranged on the top and back of the cabinet, and inspection doors are arranged at the inspection openings.

3. A novel inflatable cabinet according to claim 1, characterized in that: One set of C-type outer cone sleeves is used to install the first cable and the second cable through the front-inserted cable head and the rear-inserted cable head, and another set of C-type outer cone sleeves is used to install the third cable and the lightning arrester through another set of front-inserted cable head and the rear-inserted lightning arrester plug.

4. A novel inflatable cabinet according to claim 2, characterized in that: A sealing ring is arranged at the inspection opening, and the inspection door is in close contact with the sealing ring.

5. A novel inflatable cabinet according to claim 1, characterized in that: A ventilation base is provided at the bottom of the cabinet, an air duct is provided on the ventilation base, air inlets are provided on the front and rear sides of the cabinet, the air outlet is connected with the air duct, the air outlet and the air duct form a ventilation channel, and an induced draft fan is provided in the air duct to facilitate the introduction of air into the ventilation channel to achieve heat dissipation of the cabinet.

6. A novel inflatable cabinet according to claim 1, characterized in that: The cabinet body is composed of multiple air boxes. Reinforcing ribs are arranged on the sides of each air box. After the air boxes are spliced, the reinforcing ribs on adjacent air boxes are staggered, and ventilation holes are arranged on the reinforcing ribs. A staggered reinforcing rib layout is adopted, and ventilation holes are opened on the reinforcing ribs. At the same time, the air box structure is structurally designed. After the air boxes are spliced, a large space is left between the air boxes to facilitate air circulation.

7. A novel inflatable cabinet according to claim 6, characterized in that: A pressure relief device is arranged at the bottom of the cabinet, and the pressure relief device includes a first buckle plate and a second buckle plate. The first buckle plate is movably connected to the second buckle plate, and a spring is arranged between the first buckle plate and the second buckle plate. The first buckle plate is installed at the air inlet, and a vent is arranged on the first buckle plate. Under the action of the spring, a gap is formed between the first buckle plate and the second buckle plate to form an air inlet channel.

8. A novel inflatable cabinet according to claim 7, characterized in that: A sealed vacuum circuit breaker is arranged in the cabinet, and a columnar heat sink is arranged on the lapped seat connected to the vacuum circuit breaker. The heat conducted by the columnar heat sink can be radiated to the gas in the gas box to form heat exchange.

9. A novel inflatable cabinet according to claim 7, characterized in that: The switch in the cabinet is connected to the busbar in a overlapping manner. A V-shaped groove is provided on the overlapping conductor of the busbar, and the overlapping conductor of the busbar and the overlapping conductor of the switch are overlapped through the V-shaped groove.

10. A new method for setting a C-shaped outer cone casing of an inflatable cabinet, characterized in that: The novel inflatable cabinet is the novel inflatable cabinet described in any one of claims 1 to 9, wherein two groups of C-shaped outer cone sleeves are arranged on the cabinet body in an upper and lower distributed and staggered manner.

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