CN116247528A - Safety protection device of distribution box - Google Patents

Abstract

The invention relates to the field of circuit protection, and discloses a safety protection device of a distribution box, which comprises a main shell, and a protection unit and a triggering unit which are arranged in the main shell, wherein the protection unit comprises a storage mechanism and a spraying mechanism, the storage mechanism is triggered by the triggering unit and then supplies fire extinguishing medium to the spraying mechanism, the spraying mechanism pulls the fire extinguishing medium to spray towards a fire place, the triggering unit comprises a first induction component, a second induction component and a triggering mechanism, the first induction component is matched with the triggering mechanism to induce the circuit high-temperature abnormality of the distribution box and the induction is divided into a preparation stage and a triggering stage, and the second induction component is matched with the triggering mechanism to induce the fire abnormality of the distribution box; according to the invention, the sensing unit takes both the false triggering prevention and the timely triggering into consideration, the spraying range of the protection unit is wider, and the initial spraying speed of the fire extinguishing medium is faster.

Description

Safety protection device of distribution box

Technical Field

The invention relates to the field of circuit protection, in particular to a safety protection device of a distribution box.

Background

When the circuit is abnormal, a circuit breaker or a leakage protector in the distribution box is triggered to open the circuit, however, in real life, the high-power electric appliance is used to cause the circuit trip or the circuit open not timely, and the like, and the problem of high temperature and fire in the distribution box is caused, so that a safety protection device is necessary to be arranged in the distribution box to play a role in fire extinguishing protection.

The applicant searches and discovers a Chinese patent with the authority of CN103633568B, which discloses a household multifunctional safety protection distribution box, and the background art of the household multifunctional safety protection distribution box explicitly records that 'such as line heating caused by overlarge power load, accidental fire and the like', and when the household distribution box is abnormal in circuit, the household distribution box is combined with the phenomenon that burning and firing occur, so that the problems of high temperature and firing occur in the distribution box are truly existed, and therefore, the necessity of arranging a safety protection device in the distribution box is demonstrated again.

Disclosure of Invention

In order to solve the above-mentioned problems, an object of the present invention is to provide a protection device for improving power safety, wherein a triggering process of a triggering mechanism is divided into a preparation stage and a triggering stage, a control valve is opened in the preparation stage, a limiting component is used for removing the limit on a plunger in the triggering stage, a reaction time is provided for a distribution box and related personnel, if a circuit breaker or a worker in the distribution box cuts off a circuit in the preparation stage, a first sensing member cannot be switched towards the triggering stage, a protection unit is not triggered, and an effect of preventing false triggering can be achieved.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

The utility model provides a safety protection device of block terminal, including the main casing and set up protection element and the trigger unit in the main casing, protection element includes storage mechanism and spraying mechanism, storage mechanism is used for supplying fire extinguishing medium towards spraying mechanism after being triggered by the trigger unit, spraying mechanism is used for pulling fire extinguishing medium and sprays towards the department of firing, the trigger unit includes first response component, second response component and trigger mechanism, first response component establishes ties and sets up on the circuit of block terminal, the second response component sets up the department of easily firing in the block terminal, first response component and trigger mechanism cooperation are responded to the circuit high temperature abnormality of block terminal and are divided into preparation stage and trigger stage, second response component and trigger mechanism cooperation are responded to the abnormal department of firing of block terminal.

Further, the storage mechanism comprises a casing, the inner cavity of the casing is composed of a first cylindrical section and a second cylindrical section, the diameter of the first cylindrical section is larger than that of the second cylindrical section, a storage tank is sleeved in the first cylindrical section in a detachable mode, a discharging nozzle extends from the closed end of the storage tank, the free end of the discharging nozzle extends out of the casing and is provided with a control valve, a piston is mounted in the storage tank in a sliding mode and is used for storing fire extinguishing medium, a fixed plate is arranged at the opening of the second cylindrical section, a pushing plug is mounted in the second cylindrical section in a sliding mode, and a first spring is arranged between the pushing plug and the fixed plate.

Further, the installing port communicated with the second cylindrical section is formed in the outer surface of the casing, the limiting component comprises a fixing frame, a guide rod is radially arranged on the second cylindrical section on the fixing frame, a clamping frame is slidably arranged on the guide rod, a second spring positioned between the clamping frame and the fixing frame is sleeved outside the guide rod, a clamping groove is formed in the outer circular surface of the pushing plug, the free end of the clamping frame penetrates through the installing port and is inserted into the clamping groove, the limiting component further comprises a fixing rod parallel to the guide rod and connected with the clamping frame, and a cam rotationally arranged on the outer surface of the casing, and the cam is in contact with the fixing rod.

Further, the spraying mechanism comprises a spraying tank, a bottom plug and an upper plug are slidably mounted in the spraying tank, a joint nozzle positioned between the bottom plug and the upper plug is arranged on the outer circular surface of the spraying tank, the joint nozzle is communicated with the control valve through a connecting pipe, a lifting column extends from the end surface of the upper plug, which deviates from the bottom plug, the free end of the lifting column extends out of the spraying tank and is provided with a spraying guide plate, an arc plate is arranged on the end surface of the spraying guide plate, and the included angle of the arc plate faces to the position of the distribution box, which is easy to ignite; the inside cavity of lift post is provided with the intermediate chamber with lift post intercommunication in the upper stopper, and the outer disc of upper stopper is provided with the spread groove, and the tank bottom of spread groove is provided with the connecting hole with intermediate chamber intercommunication, and the inner wall of spray tank is provided with the external diameter that is located the shoulder one that the upper stopper deviates from the base stopper one side and shoulder one and the internal diameter of shoulder one is less than the upper stopper, and the inner wall of spray tank still is provided with the annular that is located shoulder one towards base stopper one side, and when upper stopper and shoulder one contact, annular and spread groove intercommunication.

Further, a third spring and a fourth spring are arranged in the spray tank, the third spring is used for driving the bottom plug to be close to the joint mouth, and the fourth spring is used for driving the upper plug to be close to the joint mouth.

Further, a spray hole communicated with the lifting column is formed in the spray guide plate, a support body is arranged in the spray hole, a sliding rod is slidably mounted on the support body along the extending direction of the lifting column, one end of the sliding rod extends into the lifting column and is provided with a limiting ring, the other end of the sliding rod extends out of the spray hole and is provided with a sealing plate, a spring eleven positioned between the limiting ring and the support body is sleeved outside the sliding rod, and in an initial state, the sealing plate is in contact with the spray guide plate and seals the spray hole by the elastic force of the spring eleven.

Further, an underframe is arranged in the main shell, a supporting frame is arranged on the underframe, the triggering mechanism comprises a movable frame axially and slidably arranged on the supporting frame along the storage tank, a spring six for driving the movable frame to reset is arranged on the supporting frame, and a avoidance bayonet is arranged at the bottom of the supporting frame;

a swinging component is arranged between the movable frame and the cam, and when the movable frame moves, the cam is pulled to rotate through the swinging component.

Further, the triggering mechanism further comprises a pump shell which is arranged on the underframe and parallel to the storage tank, a pump plug is slidably arranged in the pump shell, a pump plug rod is extended from the end face of the pump plug, the pump plug rod consists of a main rod which is hollow in the inside and connected with the pump plug and a sub rod which is slidably arranged in the main rod, a second shaft shoulder is formed outside the main rod, a spring nine which is arranged between the pump plug and the sub rod is arranged in the main rod, the free end of the main rod extends out of the pump shell and is positioned in an avoidance bayonet, the inner diameter of the avoidance bayonet is larger than the outer diameter of the main rod and smaller than the outer diameter of the second shaft shoulder, a rack is arranged at the free end of the sub rod in parallel, and a spring eight which is used for driving the rack to move towards the pump shell is arranged between the rack and the underframe;

the trigger mechanism further comprises an inserting shaft which is slidably arranged on the underframe and axially perpendicular to the pump plug rod, a gear is arranged outside the inserting shaft through a spline, the gear is meshed with the rack, and one end of the inserting shaft is inserted into a valve core of the control valve.

Further, the first induction component comprises a closed shell and a resistor arranged in the closed shell, two ends of the resistor extend out of the closed shell and are arranged in a circuit of the distribution box in series, the closed shell is communicated with the pump shell, the communicating position is located at one side of the pump plug, which is away from the pump plug rod, and a thermal expansion medium is stored in the closed shell.

Further, the second response component includes the mounting bracket, installs the response post on the mounting bracket, and the one end of response post is provided with to support the piece, is provided with on the mounting bracket and is initially to be compression state and elasticity and order about to support the piece and contradict with the response post spring ten, supports to be provided with between piece and the movable frame and be connected the rope.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the triggering unit comprises a first sensing component and a second sensing component:

the first induction component is arranged in a circuit of the distribution box in series and is matched with the trigger mechanism, so that the trigger process of the trigger mechanism is divided into a preparation stage and a trigger stage, in the preparation stage, the control valve is opened, and in the trigger stage, the restriction component is made to cancel the restriction on the push plug;

the second induction component is arranged at a position which is easy to generate fire and is directly triggered by fire, is matched with the triggering mechanism, and enables the control valve to be opened in the first time to enable the limiting component to cancel the limitation on the plunger, and has the significance that sometimes, the power distribution box is triggered in time due to the fact that flammable impurities such as fallen leaves in the power distribution box are ignited by heat emitted by a circuit or the fire is generated due to abnormal occurrence of the circuit and the fire is generated in a short time, at the moment, a certain time is required for thermal expansion of a thermal expansion medium of the first induction component, a protection unit cannot be triggered in time, an induction column in the second induction component is broken after being burnt by the fire, namely the existence and the breakage of the fire are timely sensed, so that the protection unit can be triggered in time to extinguish the fire;

in summary, the triggering unit in the invention combines the two aspects of false triggering and timely triggering, the triggering is more sensitive, the triggering mode is mechanical triggering, compared with the sensor sensing triggering technology in the prior art, the mechanical triggering is more reliable, the sensor triggering needs electric power, if the electric power in the distribution box is directly referenced, the circuit of the distribution box is easy to cause the influence of the circuit of the sensor when the circuit of the distribution box is abnormal, the sensing result is insensitive, if the circuit is independently arranged for the sensor, the circuit is more complicated, and the independently arranged circuit is also influenced by the internal high-temperature environment when the circuit of the distribution box is abnormal.

2. In the invention, the protection unit comprises a storage mechanism and a spraying mechanism:

in the storage mechanism, in an initial state, the movement of the pushing plug is limited through the cooperation of the clamping frame and the clamping groove, so that the compression elastic force of the first spring cannot be transmitted to the control valve through the fire extinguishing medium, and the service shelf life of the storage mechanism is prolonged; in the spraying mechanism, a third spring and a fourth spring are arranged;

in the spraying process, if the spring IV is not present, after the upper plug is contacted with the shaft shoulder I, although the pressure of the pressure area is reduced, the position of the upper plug is unchanged because the fire extinguishing medium still continuously flows towards the pressure area, and the fire extinguishing medium is continuously sprayed out through the spray holes;

in the spraying process, if the third spring is not used, when the upper plug is in small-amplitude backward state and reaches balance again, the pressure in the pressure area can be increased to push the upper plug to move, and in the invention, because the third spring exists, the bottom plug can be moved after the upper plug is in balance again, the third spring is compressed, and when spraying, the third spring also releases elasticity, so that the spraying pressure to which the fire extinguishing medium is subjected is larger, and the fire extinguishing effect can be improved.

3. The setting of circuit breaker can break off the circuit of block terminal simultaneously when protection unit is triggered to when the fire to avoid, the circuit in the block terminal does not break off and leads to the intensity of a fire to constantly grow.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an internal schematic diagram of the present invention;

FIG. 3 is a schematic diagram of a protection unit;

FIG. 4 is a schematic view of a case and a storage tank;

FIG. 5 is a cross-sectional view of the reservoir and the push assembly;

FIG. 6 is a schematic diagram of a restriction device and a plunger;

FIG. 7 is a cross-sectional view of the spray mechanism;

FIG. 8 is a partial schematic view of a spray mechanism;

FIG. 9 is a schematic diagram of a trigger unit;

FIG. 10 is a schematic diagram of a circuit breaker and a movable frame;

FIG. 11 is a schematic diagram of a circuit breaker;

FIG. 12 is a schematic view of a trigger mechanism;

FIG. 13 is a cross-sectional view of the pump housing;

FIG. 14 is a schematic view of a second sensing member;

fig. 15 is a schematic view of a first sensing member.

Detailed Description

In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1-15, a safety protection device of a distribution box comprises a main shell, and a protection unit and a triggering unit which are arranged in the main shell, wherein the triggering unit is used for sensing the condition of a circuit in the distribution box in real time, enabling the protection unit to be triggered when the circuit is abnormal due to fire or continuous high temperature abnormality, and breaking the circuit through the protection unit and simultaneously extinguishing the abnormal position.

Protection unit:

as shown in fig. 2 to 8, the protection unit includes a storage mechanism 100 storing a fire extinguishing medium, such as a water-based fire extinguishing medium, for fire extinguishing, and a spraying mechanism 200, which is triggered by the triggering unit to supply the fire extinguishing medium to the latter when the circuit is abnormal, the spraying mechanism 200 being for receiving the fire extinguishing medium and extending out of the main housing to spray the fire extinguishing medium toward the circuit abnormality.

As shown in fig. 3-5, the storage mechanism 100 includes a casing 101, where two ends of the casing 101 are open and the inner cavity is composed of a first cylindrical section and a second cylindrical section, and the diameter of the first cylindrical section is greater than that of the second cylindrical section, and a third shoulder is formed at the joint of the first cylindrical section and the second cylindrical section.

The first inner sleeve of the cylindrical section is provided with a storage tank 105, a clamping plate 102 is inserted in the opening of the first inner sleeve of the cylindrical section in a sliding manner, the storage tank 105 is assembled in the casing 101 through the cooperation of a shaft shoulder III and the clamping plate 102, the clamping plate 102 is pulled out, the storage tank 105 can be taken out of the casing 101, a discharging nozzle extends from the closed end of the storage tank 105, the free end of the discharging nozzle extends out of the casing 101 and is provided with a control valve 106, and a piston 107 is slidably installed in the storage tank 105 and stores water-based fire extinguishing medium.

The second cylinder section is provided with a pushing component for actively driving the piston 107 to move when the circuit is abnormal, and particularly, the opening of the second cylinder section is provided with a fixed plate 104, and the pushing component comprises a pushing plug 109 slidably arranged in the second cylinder section and a first spring 110 arranged between the pushing plug 109 and the fixed plate 104; when the circuit is abnormal, the control valve 106 is opened, the first spring 110 releases the elastic force, and the pushing piston 107 is pushed by the pushing plug 109 to push out the water-based fire extinguishing medium in the storage tank 105 and flow toward the spraying mechanism 200.

Further, since the water-based fire extinguishing medium is driven and pushed by the first spring 110, when not triggered, the first spring 110 is in a compressed state, the elastic force is transmitted to the control valve 106 through the fire extinguishing medium, the control valve 106 is easily damaged for a long time, and the fire extinguishing medium is easily leaked through the assembly gap of the control valve 106 as time passes, so that the shelf life of the storage mechanism 100 is short, and for this purpose, the jacket 101 is provided with a limiting component for limiting the push plug 109 when not triggered, so that the compression elastic force of the first spring 110 is not transmitted to the control valve 106 through the fire extinguishing medium;

specifically, as shown in fig. 5 and 6, the outer surface of the casing 101 is provided with a mounting opening 103 communicated with the second cylindrical section, the limiting assembly comprises a fixing frame 112, a guide rod 114 is radially arranged on the fixing frame 112 along the second cylindrical section, a clamping frame 113 is slidably arranged on the guide rod 114, a second spring 115 positioned between the clamping frame 113 and the fixing frame 112 is sleeved outside the guide rod 114, a clamping groove 111 is formed in the outer circumferential surface of the pushing plug 109, the free end of the clamping frame 113 penetrates through the mounting opening 103 and is inserted into the clamping groove 111, and in an initial state, the pushing plug 109 is limited to move through the cooperation of the clamping frame 113 and the clamping groove 111, so that the compression elasticity of the first spring 110 is not transmitted to the control valve 106 through fire extinguishing medium, and the service shelf life of the storage mechanism 100 is prolonged.

The limiting assembly further comprises a fixed rod 116 parallel to the guide rod 114 and connected with the clamping frame 113, and a cam 117 rotatably arranged on the outer surface of the casing 101, wherein the cam 117 is in contact with the fixed rod 116, when the cam 117 rotates to push against the fixed rod 116, the fixed rod 116 moves together with the clamping frame 113, so that the free end of the clamping frame 113 is retracted into the mounting opening 103 and separated from the clamping groove 111, the limiting of the pushing plug 109 is removed, and when the cam 117 rotates to release the pushing against the fixed rod 116, the spring II 115 releases the elastic force, and the limiting assembly can be reset.

Further, in order to facilitate the recycling of the storage tank 105, as shown in fig. 3-6, the free end of the clamping frame 113 is set to be in a cambered surface shape towards one side of the piston 107, a reset rod 108 extends from one side of the piston 107, the other end of the reset rod 108 passes through the fixed plate 104 and is provided with a reset handle, and the free end of the reset handle extends out of the main housing; when the storage tank 105 is triggered once, the main casing is opened, the clamping plate 102 is pulled out, the storage tank 105 is taken out from the casing 101, and is filled with fire extinguishing medium through the control valve 106 in an opened state, meanwhile, the reset handle is pulled to move through the reset rod 108 to drive the push plug 109 to move, finally the push plug 109 is retracted to the original position, due to the existence of the cambered surface, the free end of the clamping frame 113 can be reinserted into the clamping groove 111, the limiting assembly and the pushing assembly are reset, and then the filled storage tank 105 is placed back into the casing 101 and is inserted back into the clamping plate 102, so that the whole storage mechanism 100 can be completely filled and reused.

As shown in fig. 7 and 8, the spraying mechanism 200 includes a spraying tank 201, a nozzle is disposed on an outer circumferential surface of the spraying tank 201, and is communicated with the control valve 106 through a connection pipe, a bottom plug 202 and an upper plug 204 are slidably mounted in the spraying tank 201, the nozzle is located between the bottom plug 202 and the upper plug 204, an end face of the upper plug 204, which faces away from the bottom plug 202, extends to form a lifting column 205, a free end of the lifting column 205 extends out of the spraying tank 201 and is provided with a spray guide plate 209, an arc plate is disposed on an end face of the spray guide plate 209, and an included angle of the arc plate faces a place where the distribution box is prone to fire, for example, a junction of the distribution box.

A third spring 203 and a fourth spring 206 are arranged in the spray tank 201, the third spring is used for driving the bottom plug 202 to be close to the nozzle, and the fourth spring is used for driving the upper plug 204 to be close to the nozzle.

The inside of the lifting column 205 is hollow, an intermediate chamber communicated with the lifting column 205 is arranged in the upper plug 204, a connecting groove is arranged on the outer circular surface of the upper plug 204, and a connecting hole communicated with the intermediate chamber is arranged at the bottom of the connecting groove.

The inner wall of the spray tank 201 is provided with a first shaft shoulder 207 positioned on one side of the upper plug 204 away from the bottom plug 202, the inner diameter of the first shaft shoulder 207 is smaller than the outer diameter of the upper plug 204, the inner wall of the spray tank 201 is also provided with a ring groove 208 positioned on one side of the first shaft shoulder 207 towards the bottom plug 202, and when the upper plug 204 contacts with the first shaft shoulder 207, the ring groove 208 is communicated with the connecting groove.

As shown in fig. 8, the spray guide plate 209 is provided with a spray hole communicated with the lifting column 205, a support body is arranged in the spray hole, a slide bar is slidably mounted on the support body along the extending direction of the lifting column 205, one end of the slide bar extends into the lifting column 205 and is provided with a limiting ring, the other end of the slide bar extends out of the spray hole and is provided with a sealing plate 210, a spring eleven positioned between the limiting ring and the support body is sleeved outside the slide bar, and in an initial state, the elastic force of the spring eleven enables the sealing plate 210 to be in contact with the spray guide plate 209 and seal the spray hole so as to prevent dust and the like from blocking the spray hole and affecting use.

When the control valve 106 is opened through the triggering unit when the circuit is abnormal and the restriction component removes the restriction on the plunger 109, the first spring 110 releases the elastic force, the first spring 110 pushes the piston 107 to move through the plunger 109, the water-based fire extinguishing medium in the storage tank 105 is led into the spray tank 201 through the connecting pipe, and then the spray tank 201 pulls the water-based fire extinguishing medium to spray towards the abnormal position of the circuit, namely, towards the place where the burning and the firing occur for fire extinguishing, specifically as follows:

for ease of description, the area between the bottom plug 202 and the top plug 204 is designated as the pressure zone;

after the fire extinguishing medium enters the pressure area in the spray tank 201, the bottom plug 202 and the upper plug 204 are separated from each other, the third spring 203 and the fourth spring 206 are compressed, the upper plug 204 moves together with the lifting column 205 to enable the lifting column 205 to penetrate through the main shell and extend out, when the upper plug 204 moves to be in contact with the first shaft shoulder 207, the fire extinguishing medium in the pressure area enters the lifting column 205 through the annular groove 208, the connecting groove and the connecting hole and pushes the sealing plate 210 to be far away from the spray guide plate 209, then the fire extinguishing medium is sprayed out through the spray holes and collides with the sealing plate 210 and is guided by the arc plate to spray towards the abnormal circuit position in an atomization mode, wherein when the upper plug 204 moves to be in contact with the first shaft shoulder 207, the third spring 203 also simultaneously sprays and releases elastic force to push the fire extinguishing medium through the bottom plug 202, that is to be additionally pushed by the third spring 203, and the pressure to which the fire extinguishing medium is subjected to is increased;

then, as the fire extinguishing medium is sprayed, the pressure in the pressure area is reduced, so the spring IV 206 releases the elastic force, the upper plug 204 can be retracted by a small extent, the connecting groove is separated from the annular groove 208, when the upper plug 204 is retracted to the farthest distance, after the balance is achieved again, the fire extinguishing medium continuously flows towards the spray tank 201, so the pressure in the pressure area is restarted to be increased, the bottom plug 202 and the upper plug 204 are restarted to move away from each other, and when the upper plug 204 is restarted to contact with the first shaft shoulder 207, the connecting groove is communicated with the annular groove 208, the fire extinguishing medium repeats the spraying process.

In the spraying process, if there is no spring four 206, after the upper plug 204 contacts with the first shaft shoulder 207, although the pressure in the pressure area becomes smaller, the fire extinguishing medium still continuously flows towards the pressure area, so that the position of the upper plug 204 is unchanged, and the fire extinguishing medium is continuously sprayed out through the spray holes;

in the spraying process, if the third spring 203 is not provided, when the upper plug 204 is retracted by a small extent and reaches balance again, the pressure of the pressure area is increased in the case that the fire extinguishing medium is poured into the pressure area to push the upper plug 204 to move.

A triggering unit:

as shown in fig. 2 and 9, the triggering unit includes a first sensing member 400, a second sensing member 500 and a triggering mechanism 600, wherein the first sensing member 400 is disposed in series on a circuit of the distribution box, and the sensing is divided into two stages: the preparation phase and the triggering phase, when in the preparation phase, the control valve 106 is opened, when in the triggering phase, the limiting component is made to cancel the limitation on the push plug 109, the significance is that a reaction time is given to the distribution box and related personnel, if a circuit breaker or a working personnel in the distribution box breaks off a circuit in the preparation phase, the first sensing member 400 cannot be converted towards the triggering phase, the protection unit is not triggered, the function of preventing false triggering can be achieved, the second sensing member 500 is used for being directly triggered by fire, the control valve 106 is made to be opened, the limiting component is made to cancel the limitation on the push plug 109, the significance is that the second sensing member 500 is triggered by fire, the distribution box is made to fire, at this time, fire extinguishing treatment can be timely carried out through the protection unit, and the triggering mechanism 600 is arranged among the first sensing member 400, the second sensing member 500 and the protection unit, and is used for being triggered by the first sensing member 400 or the second sensing member 500 and enabling the protection unit to make corresponding feedback.

As shown in fig. 10, 12 and 13, a chassis is provided in the main housing, a supporting frame 301 is provided on the chassis, the triggering mechanism 600 includes a movable frame 601 axially slidably mounted on the supporting frame 301 along the storage tank 105, a spring six 602 for driving the movable frame 601 to reset is provided on the supporting frame 301, and a avoidance bayonet 603 is provided at the bottom of the supporting frame 301.

As shown in fig. 12, a swinging member is provided between the movable frame 601 and the cam 117, and when the movable frame 601 moves, the cam 117 is pulled to rotate by the swinging member, and specifically, the swinging member includes a swing arm 605 provided at an input end of the cam 117 and a link 604 hinged between the swing arm 605 and the movable frame 601.

As shown in fig. 12 and 13, the trigger mechanism 600 further includes a pump housing 611 disposed on the chassis and parallel to the storage tank 105, a pump plug 612 is slidably mounted in the pump housing 611, a pump plug rod extends from an end surface of the pump plug 612, the pump plug rod is composed of a main rod 613 hollow inside and connected with the pump plug 612, and a sub rod 614 slidably disposed in the main rod 613, a second shoulder 616 is formed outside the main rod 613, a spring nine 615 disposed between the pump plug 612 and the sub rod 614 is disposed inside the main rod 613, a free end of the main rod 613 extends out of the pump housing 611 and is disposed in the avoidance bayonet 603, an inner diameter of the avoidance bayonet 603 is larger than an outer diameter of the main rod 613 and smaller than an outer diameter of the second shoulder 616, a rack 609 is disposed in parallel with the free end of the sub rod 614, and a spring eight 610 for driving the rack 609 to move toward the pump housing 611 is disposed between the rack 609 and the chassis.

The trigger mechanism 600 further includes a shaft 606 slidably mounted on the chassis and axially perpendicular to the pump plug rod, a gear 608 is mounted on the outer portion of the shaft 606 through a spline, two end faces of the gear 608 are respectively in contact with the chassis, so that the gear 608 can only rotate, and when the shaft 606 moves, the gear 608 continuously outputs power to the shaft 606, and the gear 608 is meshed with a rack 609.

One end of the plug shaft 606 is plugged with a valve core of the control valve 106, a spring seven 607 is sleeved outside the plug shaft 606, the end of the plug shaft 606 and the valve core of the control valve 106 are driven by the elastic force of the spring seven 607 to maintain a plug state, as shown in fig. 5 and 12, note that the valve core of the control valve 106 is provided with a valve hole, when the valve core rotates by ninety degrees, the valve hole can be used for communication between the storage tank 105 and the connecting pipe, which is realized in the prior art, and not described in detail, in addition, when the rack 609 moves to be in contact with the underframe, the gear 608 rotates by ninety degrees, so that the valve core also rotates by ninety degrees, and the control valve 106 is opened.

The operation of the trigger mechanism 600 is specifically:

when the pump plug 612 moves, the pump plug rod moves together, in this process, firstly, the pump plug rod moves integrally, the valve core of the control valve 106 is rotated through the cooperation of the rack 609 and the gear 608, and finally the control valve 106 is opened, in addition, at this time, the second shaft shoulder 616 contacts the movable frame 601, since the outer diameter of the second shaft shoulder 616 is larger than the inner diameter of the avoidance bayonet 603 and the rack 609 cannot move continuously in contact with the underframe, after that, the control valve 106 remains in an opened state, the spring nine 615 is compressed, the main rod 613 moves continuously and pushes the movable frame 601 together through the second shaft shoulder 616, and the movable frame 601 moves to drive the cam 117 to rotate through the linkage rod 604 and the deflection arm 605, and finally the limiting component removes the limitation on the push plug 109.

As shown in fig. 15, the first sensing member 400 includes a closed shell 401 and a resistor 402 disposed in the closed shell 401, wherein the resistance value of the resistor 402 is slightly larger than the resistance value of a wire of a circuit, two ends of the resistor 402 extend out of the closed shell 401 and are serially disposed in the circuit of the distribution box, the closed shell 401 is communicated with the pump shell 611, the communicating place is located at one side of the pump plug 612 away from the pump plug rod, and a thermal expansion medium such as air or the like is stored in the closed shell 401.

When the circuit of the distribution box is abnormal, for example, the temperature is too high due to factors such as overload, the resistor 402 also releases a large amount of heat and causes the thermal expansion medium to thermally expand so as to push the pump plug 612 to move, wherein the process of moving the pump plug 612 together with the pump plug rod can be divided into two parts: the control valve 106 is opened firstly, then the limiting component is made to cancel the limitation on the plunger 109, the former corresponds to a preparation stage, the latter corresponds to a triggering stage, as long as in the preparation stage, a circuit is disconnected by a circuit breaker in a distribution box or a worker actively, the resistor 402 stops generating heat, and the thermal expansion of a thermal expansion medium is not enough to push the pump plunger 612 to enter the triggering stage, so that the protection unit is not triggered, the protection unit can play a role of preventing false triggering, and if the resistor 402 continuously generates heat, the worker does not find that the distribution box is abnormal and the circuit breaker does not timely disconnect the circuit, the triggering stage is entered, so that the protection unit is triggered, and the purpose of preventing the occurrence of fire is achieved.

As shown in fig. 14, the second sensing member 500 is disposed at a place where fire is likely to occur in the distribution box, for example, at an incoming line of the distribution box, that is, a place connected to a power line.

The second sensing member 500 includes a mounting frame 501, a sensing post 502 is mounted on the mounting frame 501, the sensing post 502 is burnt by a flame and then is broken, such as a glass post, etc., which is realized in the prior art, and not described in detail, one end of the sensing post 502 is provided with a supporting block 503, a spring ten 504 which is initially in a compressed state and drives the supporting block 503 to collide with the sensing post 502 by elastic force is disposed on the mounting frame 501, and a connecting rope 505 is disposed between the supporting block 503 and the movable frame 601.

When the circuit burns due to poor contact or the use of high-power electric appliances and the like, and the ignition happens in a short time, at this time, the thermal expansion medium of the first sensing member 400 needs a certain time for thermal expansion, so that the protection unit cannot be triggered in time, the sensing column 502 in the second sensing member 500 is burnt by the flame, namely, the sensing column is broken when the flame is timely sensed, at this time, the spring tens 504 releases the elastic force to enable the abutting block 503 to move, the abutting block 503 moves to pull the movable frame 601 to move through the connecting rope 505, and in the moving process of the movable frame 601, the cam 117 is driven to rotate directly through the linkage rod 604 and the deflection arm 605, so that the limiting component withdraws the limit on the pushing plug 109, and on the other hand, the movable frame 601 contacts with the rack 609, and moves together with the rack 609, so that the control valve 106 is opened, so that the protection unit can be triggered in time, and fire is extinguished.

In a preferred embodiment, whether the first sensing member 400 or the second sensing member 500 is used for enhancing the capability of the distribution box to timely disconnect a circuit when the circuit is abnormal, as shown in fig. 10 and 11, the circuit of the distribution box is provided with a circuit breaker 300 in series, the circuit breaker 300 comprises an outer cylinder shell 304 arranged on a supporting frame 301 and a connecting frame 302 connected with a movable frame 601, wherein a contact II 305 is arranged in the outer cylinder shell 304, a contact I303 is arranged on the connecting frame 302, the free end of the contact I303 extends into the outer cylinder shell 304 and contacts with the contact II 305, and further, a spring III 306 is arranged in the outer cylinder shell 304, the elastic force of the spring III makes the contact II 305 have a movement trend of approaching the contact I303, so that the contact I303 contacts with the contact II 305 tightly; when the movable frame 601 is triggered to move by the first sensing member 400 and the second sensing member 500, the connecting frame 302 is carried to move together with the first contact 303 to enable the first contact 303 to be separated from the second contact 305, so that a circuit of the distribution box is disconnected, and when the movable frame 601 is triggered to move, the circuit in the distribution box is abnormal and not disconnected in time, so that the invention sets the circuit breaker 300 by taking the circuit breaker as a trigger condition, the use of the distribution box is not affected, the circuit in the distribution box is disconnected in time when the protection unit is triggered, in addition, the elastic force of the spring five 306 is smaller, only the first contact 303 is tightly contacted with the second contact 305, and when the movable frame 601 is carried to move together with the first contact 303, the spring five 306 releases the elastic force to enable the second contact 305 to be only slightly moved, and the disconnection between the first contact 303 and the second contact 305 is not affected.

Claims (10)

1. Electric power safety device, including main casing and the protection unit and the trigger unit of setting in main casing, its characterized in that: the protection unit comprises a storage mechanism (100) and a spraying mechanism (200), the storage mechanism (100) is used for supplying fire extinguishing medium to the spraying mechanism (200) after being triggered by the triggering unit, the spraying mechanism (200) is used for pulling the fire extinguishing medium to spray towards a fire place, the triggering unit comprises a first sensing member (400), a second sensing member (500) and a triggering mechanism (600), the first sensing member (400) is arranged on a circuit of the distribution box in series, the second sensing member (500) is arranged at a fire place in the distribution box, the first sensing member (400) is matched with the triggering mechanism (600) to sense and divide the circuit high temperature abnormality of the distribution box into a preparation stage and a triggering stage, and the second sensing member (500) is matched with the triggering mechanism (600) to sense the fire abnormality of the distribution box.

2. The electrical safety shield apparatus of claim 1, wherein: the storage mechanism (100) comprises a casing (101), wherein an inner cavity of the casing (101) is composed of a first cylindrical section and a second cylindrical section, the diameter of the first cylindrical section is larger than that of the second cylindrical section, a storage tank (105) is detachably sleeved in the first cylindrical section, a discharging nozzle extends from the closed end of the storage tank (105), the free end of the discharging nozzle extends out of the casing (101) and is provided with a control valve (106), a piston (107) is slidably mounted in the storage tank (105) and stores fire extinguishing medium, a fixed plate (104) is arranged at an opening of the second cylindrical section, a pushing plug (109) is slidably mounted in the second cylindrical section, and a first spring (110) is arranged between the pushing plug (109) and the fixed plate (104).

3. The electrical safety shield apparatus of claim 2, wherein: the outer surface of cover shell (101) has seted up installing port (103) with cylinder section two intercommunication, be provided with restriction subassembly on cover shell (101), restriction subassembly includes mount (112), radial along cylinder section two is provided with guide arm (114) on mount (112), slidable mounting has cassette (113) on guide arm (114), the outside cover of guide arm (114) is equipped with spring two (115) that are located between cassette (113) and mount (112), the outer disc of pushing away stopper (109) is provided with draw-in groove (111), the free end of cassette (113) passes installing port (103) and inserts in draw-in groove (111), restriction subassembly still includes dead lever (116) that are parallel to guide arm (114) and are connected with cassette (113), rotate cam (117) that set up at cover shell (101) surface, cam (117) and dead lever (116) contact.

4. The electrical safety shield apparatus of claim 2, wherein: the spraying mechanism (200) comprises a spraying tank (201), a bottom plug (202) and an upper plug (204) are slidably mounted in the spraying tank (201), a joint mouth positioned between the bottom plug (202) and the upper plug (204) is arranged on the outer circular surface of the spraying tank (201), the joint mouth is communicated with the control valve (106) through a connecting pipe, a lifting column (205) extends from the end surface of the upper plug (204) deviating from the bottom plug (202), the free end of the lifting column (205) extends out of the spraying tank (201) and is provided with a spraying guide plate (209), an arc plate is arranged on the end surface of the spraying guide plate (209), and the included angle of the arc plate faces the position of the distribution box, which is easy to ignite;

the inside cavity of lift post (205), be provided with the intermediate chamber with lift post (205) intercommunication in last stopper (204), the outer disc of going up stopper (204) is provided with the spread groove, the tank bottom of spread groove is provided with the connecting hole with intermediate chamber intercommunication, the inner wall of spray tank (201) is provided with shoulder one (207) and the internal diameter of shoulder one (207) that are located last stopper (204) and deviate from bottom plug (202) one side is less than the external diameter of last stopper (204), the inner wall of spray tank (201) still is provided with annular (208) that are located shoulder one (207) and face bottom plug (202) one side, when last stopper (204) and shoulder one (207) contact, annular (208) and spread groove intercommunication.

5. The electrical safety shield apparatus of claim 4, wherein: a third spring (203) and a fourth spring (206) are arranged in the spray tank (201), the third spring (203) is used for driving the bottom plug (202) to be close to the joint mouth, and the fourth spring (206) is used for driving the upper plug (204) to be close to the joint mouth.

6. The electrical safety shield apparatus of claim 4 or 5, wherein: the spray guide plate (209) is provided with a spray hole communicated with the lifting column (205), a support body is arranged in the spray hole, a slide rod is slidably mounted on the support body along the extending direction of the lifting column (205), one end of the slide rod extends into the lifting column (205) and is provided with a limiting ring, the other end of the slide rod extends out of the spray hole and is provided with a sealing plate (210), a spring eleven positioned between the limiting ring and the support body is sleeved outside the slide rod, and in an initial state, the elastic force of the spring eleven enables the sealing plate (210) to be in contact with the spray guide plate (209) and seal the spray hole.

7. A power safety device according to claim 3, wherein: an underframe is arranged in the main shell, a supporting frame (301) is arranged on the underframe, the triggering mechanism (600) comprises a movable frame (601) axially and slidably arranged on the supporting frame (301) along the storage tank (105), a spring six (602) for driving the movable frame (601) to reset is arranged on the supporting frame (301), and an avoidance bayonet (603) is arranged at the bottom of the supporting frame (301); a swinging component is arranged between the movable frame (601) and the cam (117), and when the movable frame (601) moves, the cam (117) is pulled to rotate by the swinging component.

8. The electrical safety shield apparatus of claim 7, wherein: the trigger mechanism (600) further comprises a pump shell (611) which is arranged on the underframe and parallel to the storage tank (105), a pump plug (612) is slidably arranged in the pump shell (611), a pump plug rod is extended from the end face of the pump plug (612), the pump plug rod consists of a main rod (613) which is hollow in the inside and is connected with the pump plug (612) and a sub rod (614) which is slidably arranged in the main rod (613), a shaft shoulder II (616) is formed outside the main rod (613), a spring nine (615) which is arranged between the pump plug (612) and the sub rod (614) is arranged in the main rod, the free end of the main rod (613) extends out of the pump shell (611) and is positioned in an avoidance bayonet (603), the inner diameter of the avoidance bayonet (603) is larger than the outer diameter of the main rod (613) and smaller than the outer diameter of the shaft shoulder II (616), a rack (609) is arranged at the free end of the sub rod (614) in parallel, and a spring eight (610) which is used for driving the rack (609) to move towards the pump shell (611) is arranged between the rack (609) and the underframe;

the trigger mechanism (600) further comprises a plug shaft (606) which is slidably arranged on the underframe and axially perpendicular to the pump plug rod, a gear (608) is arranged outside the plug shaft (606) through a spline, the gear (608) is meshed with the rack (609), and one end of the plug shaft (606) is spliced with a valve core of the control valve (106).

9. The electrical safety shield apparatus of claim 8, wherein: the first induction component (400) comprises a closed shell (401) and a resistor (402) arranged in the closed shell (401), wherein two ends of the resistor (402) extend out of the closed shell (401) and are arranged in a circuit of the distribution box in series, the closed shell (401) is communicated with the pump shell (611) and the communicating position is located at one side of a pump plug (612) away from a pump plug rod, and a thermal expansion medium is stored in the closed shell (401).

10. The electrical safety shield apparatus of claim 8, wherein: the second sensing component (500) comprises a mounting frame (501), a sensing column (502) is mounted on the mounting frame (501), a supporting block (503) is arranged at one end of the sensing column (502), a spring (504) which is in a compressed state initially and is in elastic force to drive the supporting block (503) to abut against the sensing column (502) is arranged on the mounting frame (501), and a connecting rope (505) is arranged between the supporting block (503) and the movable frame (601).

Images