Metro isolating switch cabinet with self-checking fire-fighting function

Abstract

The application discloses a subway isolating switch cabinet with a self-checking fire extinguishing function, which comprises a cabinet body and a cabinet door hinged to the cabinet body; a fire detection device is vertically arranged on the inner side of a side sealing plate of the cabinet body; and a fire extinguishing unit is arranged on the top of the cabinet body; the fire extinguishing unit comprises a sealed cover fixed to the top of the cabinet body, a control device arranged on the upper part of the sealed cover and a reaction device arranged on the lower part of the sealed cover; the reaction device is communicated with the inner cavity of the cabinet body through an exhaust pipe; the fire detection device is connected with the control device, and the control device is connected with the reaction device; the fire detection device drives the control device to remove the isolation state of the reaction raw materials in the reaction device, so that the reaction raw materials are mixed and chemically reacted to generate fire-extinguishing gas; and the fire-extinguishing gas is transmitted to the inner cavity of the cabinet body through the exhaust pipe to isolate oxygen and extinguish the fire. The subway isolating switch cabinet has the function of automatically extinguishing fire, thereby avoiding the spread of fire, the burning of adjacent power supply equipment and facilities, ensuring the safety of line power supply and avoiding greater property losses.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metro disconnector cabinets, and particularly relates to a metro disconnector cabinet with a self-checking fire extinguishing function. BACKGROUND

[0002] At present, metro DC disconnector cabinets commonly used in urban rail transit traction power supply systems are divided into single-pole, double-pole and three-pole types, which can be flexibly applied in lines. Taking a metro three-pole DC disconnector cabinet as an example, related devices such as disconnector switches are integrated and installed in the cabinet body. In normal working conditions, the middle tie switch is in an open position, and the disconnector switches on both sides are in a closed position. When a fault occurs in a power supply line of the contact network on one side, the disconnector switch of the fault line is disconnected, and the tie switch in the middle position is closed, so that over-range power supply can be realized. The control signals, fault signals and state signals in the switch cabinet are connected to the comprehensive automation system through terminal blocks, so that remote control, remote measurement and remote signaling functions can be easily realized. At the same time, when a fault occurs, the fault point can be quickly narrowed and the fault repair time can be shortened.

[0003] However, the existing metro DC disconnector cabinet has always lacked a fire warning function. Once a fire occurs in the cabinet due to some reasons, the maintenance unit cannot timely discover and handle it, which not only causes the electrical components in the cabinet to burn out, but also may cause the fire to spread, burn out adjacent power supply equipment and facilities, expand the fire accident, affect the safety of line power supply, and cause property loss. SUMMARY

[0004] In order to solve the above problems in the prior art, the present application provides a metro disconnector cabinet with a self-checking fire extinguishing function. The technical problem to be solved by the present application is solved by the following technical scheme:

[0005] The metro disconnector cabinet with a self-checking fire extinguishing function comprises a cabinet body and a cabinet door hinged to the cabinet body. A fire detection device is vertically installed in the inner side of a side sealing plate of the cabinet body. A fire extinguishing unit is installed on the top of the cabinet body. The fire extinguishing unit comprises a sealed housing fixed to the top of the cabinet body. A control device is arranged in the upper part of the sealed housing, and a reaction device is arranged in the lower part of the sealed housing. The reaction device is communicated with the inner cavity of the cabinet body through an exhaust pipe. The fire detection device is connected with the control device, and the control device is connected with the reaction device. The fire detection device drives the control device to remove the isolation state of the reaction raw materials in the reaction device, so that the reaction raw materials are mixed and chemically reacted to generate fire-extinguishing gas. The fire-extinguishing gas is transmitted to the inner cavity of the cabinet body through the exhaust pipe to isolate oxygen and extinguish the fire.

[0006] Further, the reaction device is a box type structure, the middle part of the box type structure is separated into an upper raw material cavity and a lower reaction cavity by a partition plate, the top of the raw material cavity is provided with a movable cover plate, the lower end of the movable cover plate is vertically fixed with a plurality of first sliding rods, the lower end of the first sliding rod is sealed to extend into the reaction cavity through a through hole on the partition plate, hydrochloric acid is added in the raw material cavity, and calcium carbonate raw material is sealed in the reaction cavity.

[0007] Further, the control device comprises an energy storage ratchet mechanism, a driving shaft, a rotating plate, a pull rod, a limiting plate and a tension spring arranged in the closed shell, the energy storage ratchet mechanism is installed in the closed shell through the driving shaft, the rotating plate is fixed in the middle part of the driving shaft, the pull rod is symmetrically connected to the two ends of the rotating plate, the outer end of the pull rod is connected to the upper end of the limiting plate through a connecting rod, the limiting plate is vertically installed in the closed shell through a limiting shaft, and the lower end of the limiting plate abuts against the upper end surface of the movable cover plate, and the lower end of the tension spring is connected to the upper end surface of the movable cover plate, the upper end of the tension spring is connected to the top of the closed shell and is in an elongated state.

[0008] Further, the fire detection device comprises a mounting plate, a memory spring, a guide block and a push rod, the mounting plate is fixed to the inner side of the sealing plate, the guide block is fixed to the outer side of the mounting plate, the push rod is vertically and slidingly connected to the guide block, and the upper end of the push rod is connected to the energy storage ratchet mechanism, the memory spring is vertically arranged on the inner side of the mounting plate and is in an elongated state, the upper end of the memory spring is fixed to the mounting plate, the lower end of the memory spring is connected to the push rod through a connecting rod penetrating a strip-shaped hole formed on the mounting plate, and the memory spring is contracted by heat to drive the push rod to move upward.

[0009] Further, the energy storage ratchet mechanism comprises a ratchet, a torsional spring, a pawl and a compression spring sheet, the ratchet is fixed to one end of the driving shaft, a concentric arc-shaped hole is formed in the ratchet, a first pin shaft is fixed to the ratchet near one end of the arc-shaped hole, a second pin shaft is fixed to the side wall of the closed shell and extends into the arc-shaped hole, the torsional spring is sleeved on the driving shaft, and the two arms of the torsional spring are connected to the first pin shaft and the second pin shaft respectively, the pawl is hinged to the side wall of the closed shell below the ratchet, one end of the pawl is clamped into the ratchet teeth so that the ratchet is in an energy storage state, the other end of the pawl is hinged to the upper end of the push rod, and the compression spring sheet is fixed to the side wall of the closed shell below the contact end of the pawl and the ratchet teeth.

[0010] Further, the reaction cavity is provided with a stirring device, the stirring device comprises a vortex spring and a horizontal stirring rod, the vortex spring is fixed at the bottom of the reaction cavity, and the vertical rotating shaft in the middle of the vortex spring is fixed with the horizontal stirring rod; the lower end of the movable cover plate is vertically fixed with a plurality of second sliding rods, the lower end of the second sliding rod penetrates into the reaction cavity through the through hole on the partition plate, and the second sliding rods are arranged on both sides of the horizontal stirring rod to limit the rotation of the horizontal stirring rod, so that the vortex spring is in an energy storage state.

[0011] The beneficial effects of the present application are as follows:

[0012] 1、 the present application through the design of fire detection device, control device, reaction device and exhaust pipe, so that in the presence of high temperature fire, fire detection device will drive control device, control device drives the reaction device, reaction device raw material cavity of hydrochloric acid solution will enter the reaction cavity, so that the hydrochloric acid solution immediately reacts with calcium carbonate in the reaction cavity to generate carbon dioxide gas, a large amount of carbon dioxide gas enters the switch cabinet cavity through the exhaust pipe, isolates the oxygen in the switch cabinet, makes the combustion oxygen deficiency and extinguishes, achieves the purpose of extinguishing the switch cabinet, thereby avoiding the further spread of fire, burning adjacent power supply equipment and facilities, avoiding the expansion of fire accident, thereby ensuring the safety of line power supply, avoiding causing greater property loss;

[0013] 2、 the present application is provided with a stirring device in the reaction cavity, when the chemical reaction starts, the stirring device stirs the materials in the reaction cavity, so that the hydrochloric acid reacts completely with the calcium carbonate, and the stirring process improves the reaction speed, so that the content of carbon dioxide generated in a short time is more, which is helpful to extinguish the fire.

[0014] The present application will be further described in detail below with reference to the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the appearance of one side of the switch cabinet of the present application;

[0016] Figure 2 It is a schematic view of the structure of one side of the fire detection device;

[0017] Figure 3 It is a schematic view of the structure of the other side of the fire detection device; Figure 2 It is an enlarged structural schematic view of part A in the middle;

[0018] Figure 4 It is a schematic view of the structure of the other side of the fire detection device;

[0019] Figure 5 It is an enlarged structural schematic view of part B in the middle; Figure 4

[0020] Figure 6 ​It is a schematic diagram of internal planar structure of the fire extinguishing unit;

[0021] Figure 7 It is a schematic diagram of internal planar structure of the fire extinguishing unit; Figure 6 It is a schematic diagram of sectional structure of A-A in the middle;

[0022] Figure 8 It is a schematic diagram of sectional structure of A-A in the middle; Figure 6 It is a schematic diagram of sectional structure of B-B in the middle.

[0023] Explanation of reference signs:

[0024] 1-cabinet body; 2-fire detection device; 3-fire extinguishing unit; 4-exhaust pipe; 1-1-cabinet door; 1-2-enclosing plate; 2-1-mounting plate; 2-2-memory spring; 2-3-guiding block; 2-4-push rod; 2-5-connecting rod; 3-1-hermetic cover; 3-2-control device; 3-3-reaction device; 3-2-1-energy storage ratchet mechanism; 3-2-2-driving shaft; 3-2-3-rotating plate; 3-2-4-pull rod; 3-2-5-limiting plate; 3-2-6-tension spring; 3-2-7-connecting rod; 3-2-8-limiting shaft; 3-3-1-separating plate; 3-3-2-raw material cavity; 3-3-3-reaction cavity; 3-3-4-movable cover plate; 3-3-5-first sliding rod; 3-3-6-volute spring; 3-3-7-horizontal stirring rod; 3-3-8-vertical rotating shaft; 3-3-9-second sliding rod; 3-2-1-1-ratchet; 3-2-1-2-torsion spring; 3-2-1-3-pawl; 3-2-1-4-spring pressing piece; 3-2-1-5-arc-shaped hole; 3-2-1-6-first pin shaft; 3-2-1-7-second pin shaft. DETAILED DESCRIPTION

[0025] The application will be described in further detail below with reference to specific embodiments, but the embodiments of the application are not limited thereto.

[0026] It should be understood that the terms "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0027] Please also refer to Figures 1-8The subway isolating switch cabinet with self-checking fire extinguishing function, specifically comprising a cabinet body 1 and a cabinet door 1-1 hinged to the cabinet body 1, a fire detection device 2 vertically installed in the inner side of a side sealing plate 1-2 of the cabinet body 1, and a fire extinguishing unit 3 installed on the top of the cabinet body 1.

[0028] Specifically, the reaction device 3-3 is a box structure, the middle part of the box structure is divided into an upper raw material cavity 3-3-2 and a lower reaction cavity 3-3-3 by a partition plate 3-3-1, and the top of the raw material cavity 3-3-2 is provided with a movable cover plate 3-3-4; a plurality of first sliding rods 3-3-5 are vertically fixed to the lower end of the movable cover plate 3-3-4, and the first sliding rods 3-3-5 are short sliding rods; the lower ends of the first sliding rods 3-3-5 are sealed through the through holes in the partition plate 3-3-1 and extend into the reaction cavity 3-3-3; hydrochloric acid is added in the raw material cavity 3-3-2, and calcium carbonate particles are sealed in the reaction cavity 3-3-3.

[0029] In addition, in order to ensure that the reaction can be fully carried out, two sets of stirring devices are installed at the bottom of the reaction cavity 3-3-3, the stirring devices comprise a spiral spring 3-3-6 and a horizontal stirring rod 3-3-7, the spiral spring is fixed to the bottom of the reaction cavity 3-3-3, and a vertical rotating shaft 3-3-8 in the middle part of the spiral spring is fixed with the horizontal stirring rod 3-3-7; the vertical rotating shaft 3-3-8 is movably connected to the bottom of the reaction cavity 3-3-3 and is sealed with the bottom of the reaction cavity 3-3-3 by a sealing ring; a plurality of second sliding rods 3-3-9 are vertically fixed to the lower end of the movable cover plate 3-3-4, and the second sliding rods 3-3-9 are long sliding rods; the lower ends of the second sliding rods 3-3-9 are sealed through the through holes in the partition plate 3-3-1 and extend into the reaction cavity 3-3-3, and the second sliding rods 3-3-9 are arranged in pairs on the two sides of the horizontal stirring rod 3-3-7 to limit the rotation of the horizontal stirring rod 3-3-7, so that the spiral spring 3-3-6 is in an energy storage state.

[0030] Specifically, the control device 3-2 comprises an energy storage ratchet mechanism 3-2-1, a drive shaft 3-2-2, a rotating plate 3-2-3, a pull rod 3-2-4, a limiting plate 3-2-5 and a tension spring 3-2-6 arranged in the closed housing 3-1; the energy storage ratchet mechanism 3-2-1 is installed in the closed housing 3-1 through the drive shaft 3-2-2, the drive shaft 3-2-2 is located on the two side walls of the closed housing 3-1, the rotating plate 3-2-3 is fixed in the middle of the drive shaft 3-2-2, the two ends of the rotating plate 3-2-3 are symmetrically connected with the pull rod 3-2-4, the pull rod 3-2-4 is perpendicular to the drive shaft 3-2-2, the outer end of the pull rod 3-2-4 is connected with the upper end of the limiting plate 3-2-5 through a connecting rod 3-2-7, the connecting rod 3-2-7 is hinged to the pull rod 3-2-4 and the limiting plate 3-2-5 respectively, the limiting plate 3-2-5 is vertically installed in the closed housing 3-1 through a limiting shaft 3-2-8 located below the connecting rod 3-2-7, the lower end of the limiting plate 3-2-5 abuts against the upper end surface of the movable cover plate 3-3-4, the lower end of the tension spring 3-2-6 is connected to the upper end surface of the movable cover plate 3-3-4, the upper end of the tension spring 3-2-6 is connected to the top of the closed housing 3-1 and is in an elongated state. The number of tension springs 3-2-6 is not less than 4, and they are symmetrically arranged outside the limiting plate 3-2-5.

[0031] Further, the energy storage ratchet mechanism 3-2-1 includes a ratchet 3-2-1-1, a torsion spring 3-2-1-2, a pawl 3-2-1-3, and a compression spring 3-2-1-4; the ratchet 3-2-1-1 is fixed to one end of the drive shaft 3-2-2, and an arc-shaped hole 3-2-1-5 concentric with the ratchet 3-2-1-1 is provided on the ratchet 3-2-1-1; a first pin 3-2-1-6 is fixed on the ratchet 3-2-1-1 near the end of the arc-shaped hole 3-2-1-5; the sealed cover 3 A second pin 3-2-1-7 is fixed on the side wall of the -1, and the second pin 3-2-1-7 extends into the arc-shaped hole 3-2-1-5. The torsion spring 3-2-1-2 is fitted on the drive shaft 3-2-2, and the two arms of the torsion spring 3-2-1-2 are respectively connected to the first pin 3-2-1-6 and the second pin 3-2-1-7. The pawl 3-2-1-3 is hinged in the middle to the side wall of the sealed cover 3-1 by a pin and is located below the ratchet 3-2-1-1. One end of the pawl 3-1-3 engages with the teeth of the ratchet 3-2-1-1, thus locking the ratchet 3-2-1-1. Under the action of the torsion spring 3-2-1-3, the ratchet 3-2-1-1 is in an energized state. The other end of the pawl 3-2-1-3 is hinged to the upper end of the fire detection device 2. At the same time, in order to ensure the locking force, a pressure spring 3-2-1-4 is provided at the lower part of the pawl 3-2-1-3. The lower end of the pressure spring 3-2-1-4 is fixed to the inner side wall of the sealed cover 3-1, and its upper end spring is pressed against the pawl 3-2-1-3. -1-3 applies a certain pressure to the lower end of the contact end with the ratchet 3-2-1-1 teeth to lock the pawl 3-2-1-3, preventing the pawl 3-2-1-3 from malfunctioning. The pressure spring 3-2-1-4 forces the pawl 3-2-1-3 to firmly lock the ratchet 3-2-1-1, ensuring the reliability of the entire control device. When the pawl 3-2-1-3 leaves the ratchet 3-2-1-1, the torsion spring 3-2-1-2 provides rotational force to the ratchet 3-2-1-1, thereby driving the drive shaft 3-2-2 to rotate.

[0032] In this embodiment of the invention, with Figure 7 and Figure 8For reference, the direction of the rotating plate 3-2-3 is set at 45° with the upper end surface of the movable cover plate 3-3-4, and the second pin shaft 3-2-1-7 is located at the right side of the first pin shaft 3-2-1-6. When the pawl 3-2-1-3 is away from the ratchet wheel 3-2-1-1, the ratchet wheel 3-2-1-1 rotates counterclockwise, driving the driving shaft 3-2-2 and the rotating plate 3-2-3 to rotate counterclockwise at the same time, so that the rotating plate 3-2-3 drives the pull rod 3-2-4, the pull rod 3-2-4 drives the connecting rod 3-2-7 to move in the direction of approaching each other, so that the limiting plate 3-2-5 rotates to be away from the upper end surface of the movable cover plate 3-3-4. At this time, the movable cover plate 3-3-4 is not subjected to any force, and the tension spring 3-2-6 is in a force-free state, driving the movable cover plate 3-3-4 to move upward, and the movable cover plate 3-3-4 drives the first sliding rod 3-3-5 and the second sliding rod 3-3-9 to move upward together. Since the first sliding rod 3-3-5 is a short sliding rod, it will be separated from the partition plate 3-3-1, so that the hydrochloric acid in the raw material cavity 3-3-2 flows into the reaction cavity 3-3-3 through the through hole on the partition plate 3-3-1 along the first sliding rod 3-3-5, and rapidly reacts with calcium carbonate in the reaction cavity 3-3-3, and the chemical formula is as follows:

[0033] 2HCl + CaCO3 = CaCl2 + H2O + CO2↑

[0034] A large amount of carbon dioxide is generated by the reaction, and finally enters the inner cavity of the switch cabinet body 1 through the exhaust pipe 4, isolates the oxygen in the interior of the switch cabinet, and makes the combustion material lack oxygen and extinguish, so as to achieve the purpose of extinguishing the fire in the interior of the switch cabinet.

[0035] At the same time, when the second sliding rod 3-3-9 moves upward, it will be above the horizontal stirring rod 3-3-7, losing the limiting effect on the horizontal stirring rod 3-3-7. At this time, the spiral spring 3-3-6 starts to release the elastic force, driving the horizontal stirring rod 3-3-7 to rotate, and the horizontal stirring rod 3-3-7 starts to stir the calcium carbonate in the reaction cavity 3-3-3, so that the hydrochloric acid solution reacts completely with the calcium carbonate, improving the reaction speed and accelerating the speed of extinguishing the fire.

[0036] It should be noted that in order to ensure the rapid generation of carbon dioxide gas, a sufficient number of first sliding rods 3-3-5 with appropriate thickness are arranged under the premise of meeting the overall strength of the fire extinguishing unit 3, so as to ensure that the amount of hydrochloric acid flowing into the reaction cavity 3-3-3 at the beginning is sufficient to react with calcium carbonate to generate carbon dioxide gas. The specific number and size of the first sliding rod 3-3-5 are related to the content of calcium carbonate, which will not be described in detail in the embodiment of the present application.

[0037] In addition, in order to ensure the sealing of the reaction device 3-3, the energy storage ratchet mechanism 3-2-1 in the control device 3-2 is separated from other components by a side plate, which serves as a side wall of the reaction device 3-3.

[0038] Specifically, the fire detection device 2 comprises a mounting plate 2-1, three memory springs 2-2, two guide blocks 2-3 and a push rod 2-4; the mounting plate 2-1 is vertically fixed inside the sealing plate 1-2, the guide blocks 2-3 are vertically fixed outside the mounting plate 2-1 respectively, the push rod 2-4 is vertically and slidingly connected to the guide blocks 2-3, the guide blocks 2-3 provide guiding effect for the push rod 2-4 and control the movement direction of the push rod 2-4; the upper end of the push rod 2-4 is connected to the other end of the pawl 3-2-1-3; the memory springs 2-2 are equidistantly and vertically arranged inside the mounting plate 2-1 and are in an elongated state, the upper end of the memory spring 2-2 is fixed to the mounting plate 2-1, three connecting rods 2-5 are equidistantly and horizontally arranged on the push rod 2-4 in the vertical direction, three strip-shaped holes are equidistantly and vertically arranged on the mounting plate 2-1 opposite to the connecting rods 2-5, the connecting rods 2-5 extend into the inside of the mounting plate 2-1 along the bottom of the strip-shaped holes, and the lower end of the memory spring 2-2 is connected to the push rod 2-4 through the connecting rods 2-5, the memory spring 2-2 is caused to shrink due to heat and drives the push rod 2-4 to move upward.

[0039] The memory spring 2-2 is made of a titanium-nickel memory alloy wire and belongs to a temperature-sensing driving element, the phase transition temperature of the memory spring 2-2 is 65-85 DEG C, the memory spring 2-2 has a one-way memory effect, and after being elongated, the memory spring 2-2 will restore the original length when the temperature rises to the phase transition temperature; therefore, the three memory springs 2-2 are equidistantly and vertically fixed to the inside of the mounting plate 2-1, and the high temperature generated by fire at any position in the switch cabinet can be detected. When a fire occurs in the switch cabinet, the memory spring 2-2 is caused to shrink and restore the original length when the temperature reaches the phase transition temperature, thereby driving the push rod 2-4 to slide upward, and due to the one-way memory effect of the memory spring 2-2, the push rod 2-4 is kept at the position after the upward sliding is completed.

[0040] It should be noted that, in order to ensure the sealing property of the reaction cavity 3-3-3 and the raw material cavity 3-3-2 and improve the storage time of hydrochloric acid, the shell of the entire fire extinguishing unit 3, the four walls of the reaction cavity 3-3-3 and the four walls of the raw material cavity 3-3-2 and the first sliding rod 3-3-5 and the second sliding rod 3-3-9 are all made of polytetrafluoroethylene material which is corrosion-resistant, high-temperature-resistant and lubricating.

[0041] The use principle of the self-checking fire extinguishing function of the subway disconnecting switch cabinet is as follows:

[0042] When the subway switch cabinet is on fire, the memory spring 2-2 is heated and shrinks gradually due to the increasing temperature, which drives the push rod 2-4 to move upwards, the push rod 2-4 drives the pawl 3-2-1-3 to rotate, so that the pawl 3-2-1-3 is decoupled from the ratchet wheel 3-2-1-1, and the ratchet wheel 3-2-1-1 rotates rapidly under the action of the torsion spring 3-2-1-2, the driving shaft 3-2-2 and the rotating plate 3-2-3 rotate coaxially with the ratchet wheel 3-2-1-1, the pull rod 3-2-4 is pulled to move, and then the limiting plates 3-2-5 on both sides are rotated inward, so that the stress state of the movable top cover 3-3-4 of the raw material cavity 3-3-2 is released, at this time, the tension spring 3-2-6 is contracted, the first sliding rod 3-3-5 and the second sliding rod 3-3-9 are pulled to move upwards, the first sliding rod 3-3-5 is separated from the partition plate 3-3-1, the hydrochloric acid solution arranged in the raw material cavity 3-3-2 flows into the reaction cavity 3-3-3 through the through hole on the partition plate 3-3-1 along the first sliding rod 3-3-5, and reacts with calcium carbonate in the reaction cavity 3-3-3 to generate a large amount of carbon dioxide gas, the large amount of carbon dioxide gas enters the inner cavity of the switch cabinet body 1 through the exhaust pipe 4, so that the supply of oxygen in the switch cabinet is cut off, so that the combustion is oxygen-deficient and extinguished, and the purpose of extinguishing the fire in the switch cabinet is achieved.

[0043] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features.

[0044] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be regarded as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A subway disconnector cabinet with self-checking fire protection function, characterized in that, The utility model relates to a fire extinguishing cabinet, including cabinet and hinged cabinet door on the cabinet, the fire detection device is installed to the inside vertical of cabinet side sealing plate, and the fire extinguishing unit is installed to the top of cabinet, the fire extinguishing unit includes the closed cover fixed in the top of cabinet, the control device is arranged in the upper portion in the closed cover, and the reaction device is arranged in the lower portion, and the reaction device communicates with the inner chamber of cabinet through the exhaust pipe, the fire detection device is connected with the control device, the control device is connected with reaction device, the fire detection device drives the control device to remove the reaction raw material isolation state in the reaction device, makes the reaction raw material mix and take place chemical reaction, produces the gas that can extinguish fire, and the fire extinguishing gas is transmitted to the inner chamber of cabinet through the exhaust pipe and extinguishes the fire with oxygen and will extinguish the fire gas. The reaction device is the box type structure, and the box type structure is divided into the upper portion raw material chamber and the lower portion reaction chamber through the partition board in the middle, the movable cover is equipped at the top of raw material chamber, the first slide bar is fixed vertically in the lower end of movable cover, the lower end of first slide bar is sealed and passes through the through hole on the partition board and extends into the reaction chamber, hydrochloric acid is added in the raw material chamber, and calcium carbonate raw material is sealed in the reaction chamber. The control device includes the energy storage ratchet mechanism, drive shaft, rotating plate, pull rod, limit plate and tension spring arranged in the closed cover, the energy storage ratchet mechanism is installed in the closed cover through drive shaft, the rotating plate is fixed in the middle of drive shaft, and the pull rod is connected symmetrically on both ends of rotating plate, the outer end of pull rod is connected with the upper end of limit plate through connecting rod, the limit plate is installed vertically in the closed cover through limit shaft, and the lower end is abutted on the upper end surface of movable cover, and the lower end of tension spring is connected on the upper end surface of movable cover, and the upper end is connected in the top of closed cover and is in the elongation state. The fire detection device includes mounting plate, memory spring, guide block and push rod, the mounting plate is fixed on the inside of sealing plate, the guide block is fixed on the outside of mounting plate, the push rod is vertically and slidingly connected on the guide block, and the upper end of push rod is connected with the energy storage ratchet mechanism, the memory spring is vertically arranged on the inside of mounting plate and is in the elongation state, the upper end of memory spring is fixed on the mounting plate, and the lower end is connected with the push rod through connecting rod and passes through the strip-shaped hole on the mounting plate, the memory spring is contracted by heat, and the push rod is driven to move upwards. The energy storage ratchet mechanism comprises a ratchet wheel, a torsion spring, a pawl and a compression spring sheet; the ratchet wheel is fixed at one end of the driving shaft, and a concentric arc-shaped hole is formed in the ratchet wheel, a first pin shaft is fixed on the ratchet wheel near one end of the arc-shaped hole, a second pin shaft is fixed on the side wall of the closed shell and extends into the arc-shaped hole, the torsion spring is sleeved on the driving shaft, and the two arms of the torsion spring are connected with the first pin shaft and the second pin shaft respectively; the pawl is hinged on the side wall of the closed shell below the ratchet wheel, one end of the pawl is clamped into the ratchet wheel teeth so that the ratchet wheel is in an energy storage state, and the other end of the pawl is hinged with the upper end of the push rod; the compression spring sheet is fixed on the side wall of the closed shell below the contact end of the pawl and the ratchet wheel teeth.

2. The subway disconnector cabinet with self-checking fire extinguishing function according to claim 1, characterized in that, The reaction cavity is provided with a stirring device, the stirring device comprises a vortex spring and a horizontal stirring rod, the vortex spring is fixed at the bottom of the reaction cavity, and the vertical rotating shaft in the middle of the vortex spring is fixed with the horizontal stirring rod; a plurality of second sliding rods are vertically fixed at the lower end of the movable cover plate, the lower end of the second sliding rod is sealed through the through hole of the partition plate and extends into the reaction cavity, and the second sliding rods are arranged on both sides of the horizontal stirring rod in pairs to limit the rotation of the horizontal stirring rod, so that the vortex spring is in an energy storage state.

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