CN110611307A - High-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of high-voltage electric fire pump - Google Patents
High-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of high-voltage electric fire pump Download PDFInfo
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- CN110611307A CN110611307A CN201910736780.9A CN201910736780A CN110611307A CN 110611307 A CN110611307 A CN 110611307A CN 201910736780 A CN201910736780 A CN 201910736780A CN 110611307 A CN110611307 A CN 110611307A
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- 238000007689 inspection Methods 0.000 title claims abstract description 110
- 230000007246 mechanism Effects 0.000 claims description 68
- 230000007306 turnover Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 abstract description 9
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- 230000005540 biological transmission Effects 0.000 description 10
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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Abstract
The invention discloses a high-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of a high-voltage electric fire pump, which comprises a high-voltage control cabinet, a high-voltage operation power supply and a low-voltage low-frequency inspection power supply which are arranged in a cabinet body, and a switching circuit capable of switching the connected high-voltage operation power supply and the low-voltage low-frequency inspection power supply. The switching circuit is provided with a double-throw isolating switch with a visible safety isolation breakpoint, and the high-voltage control cabinet is internally provided with an inspection switching control system which can drive the double-throw isolating switch to safely switch an accessed high-voltage running power supply and a low-voltage low-frequency inspection power supply. The high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system safely and reliably solves the problem of automatic and rapid switching of the high-voltage electric fire pump between a fire-fighting state and a low-voltage low-frequency inspection state. The system is provided with visible safe isolation breakpoints, so that the high-voltage operation power supply and the low-voltage low-frequency inspection power supply can be safely isolated, and the operation condition of the high-voltage cabinet can be conveniently observed; belongs to the technical field of high-voltage control cabinets.
Description
Technical Field
The invention relates to the technical field of high-voltage control cabinets, in particular to a high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system.
Background
The existing high-voltage dual-power switching scheme is realized by additionally arranging electrical and mechanical interlocking between two high-voltage circuit breakers, and the scheme has the advantages of large product volume, high cost and no visible safety isolation breakpoint, so that the scheme is not suitable for switching dual-loop power supplies with different voltage grades; if obvious visible safe isolation breakpoints exist, a handcart type breaker is also required to be selected; the two technical requirements of isolating breakpoints and automatically switching can be seen, and the traditional technical scheme can not be realized at the same time.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and aims to provide a high-voltage fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system which is capable of automatically and quickly switching between a high-voltage power supply and a low-voltage power supply and has high reliability for a high-voltage electric fire pump.
In order to achieve the purpose, the invention provides a high-reliability high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of a high-voltage electric fire pump, which comprises a high-voltage control cabinet, a high-voltage running power supply and a low-voltage low-frequency inspection power supply which are arranged in a cabinet body, and a switching circuit capable of switching the connected high-voltage running power supply and the low-voltage low-frequency inspection power supply, wherein a double-throw isolating switch with a visible isolating breakpoint is arranged on the switching circuit, and an inspection switching control system capable of driving the double-throw isolating switch to switch the connected high-voltage running power supply and the low-voltage low-frequency inspection power supply is arranged in the cabinet body of the high-voltage.
Furthermore, an upper wire inlet end of the double-throw isolating switch is connected with a high-voltage running power supply, a lower wire inlet end of the double-throw isolating switch is connected with a low-voltage low-frequency inspection power supply, a wire outlet end in the middle of the double-throw isolating switch is connected with a fire pump, and an upper cutter head and a lower cutter head which can be turned over are arranged on the wire outlet end in the middle of the double-throw isolating switch; the inspection switching control system can drive the upper cutter head and the lower cutter head to be turned in the same direction to switch the power supply connected to the double-throw isolating switch.
Furthermore, a double-crankshaft linkage mechanism is arranged on the double-throw isolating switch, and double crankshafts of the double-crankshaft linkage mechanism can rotate to respectively drive the upper cutter head and the lower cutter head to turn over; the inspection switching control system can drive the double crankshafts of the double crankshaft linkage mechanism to rotate forwards or reversely.
Still further, patrol and examine switching control system and include the rotatory slider-crank mechanism of the double crankshafts of drive double crankshafts link gear, drive the gliding electric operating mechanism of slider and the low pressure low frequency of slider-crank mechanism and patrol and examine the executor, the drive that is equipped with on the crank of slider-crank mechanism the rotatory first connecting rod of double crankshafts link gear.
As a further improvement, when the double-throw isolating switch is in an upper cutter head closing state and a lower cutter head opening state, the high-voltage operation power supply is connected, the fire pump is in a fire-fighting ready state, and when the fire pump receives a fire-fighting signal, the pump is started immediately; when the inspection switching control system receives an inspection signal and does not have a fire signal at the same time, the inspection switching control system drives the cutter head of the double-throw isolating switch to turn over from an upper cutter closing state and a lower cutter opening state into an upper cutter opening state and a lower cutter closing state, at the moment, a low-voltage low-frequency inspection power supply is connected, and the fire pump enters an inspection execution state; when the inspection is finished, the double-throw isolating switch restores the states of 'upper cutter closing and lower cutter opening', and is connected with a high-voltage power supply for ready fire control execution; when the fire pump is in the patrol and examine execution state, receive the fire control signal, interrupt immediately and patrol and examine the execution, double throw isolator is switched into "upper slitter closes, lower slitter branch" state by "upper slitter divides, the lower slitter divides" state, and the fire pump puts into high pressure running state simultaneously.
Furthermore, the inspection switching control system further comprises a manual operation mechanism for manually operating the sliding block of the crank sliding block mechanism to slide.
Furthermore, a low-frequency inspection power switch, an alternating current contactor and a low-frequency inspection executor are arranged on the switching circuit.
Advantageous effects
Compared with the prior art, the high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system has the following beneficial effects: according to the technical scheme provided by the invention, the high-voltage double-throw switching isolating switch with the inspection switching control system is introduced, so that the automatic and rapid switching between one high-voltage power supply and the other low-voltage power supply is successfully realized, and a visible safety isolation breakpoint is provided; the mutual switching between the high-voltage fire-fighting working power supply and the low-voltage low-frequency inspection power supply is realized by controlling the positions of the upper tool bit and the lower tool bit through the double-crankshaft linkage mechanism, the switching is convenient and reliable, the switching speed is high, and the high-voltage fire-fighting power supply and the low-voltage low-frequency inspection power supply can be separated by introducing the high-voltage double-throw isolating switch, so that the isolation of the power supplies has visible safe breakpoints, and the high-degree automation of the inspection operation and maintenance of the high-voltage fire pump control system is realized; the automatic and fast switching of the fire pump between a high-pressure fire fighting state and a low-pressure low-frequency inspection state is safely and reliably solved; and a manual operation scheme is also arranged, so that manual emergency operation is realized, and power-off maintenance is facilitated.
Drawings
FIG. 1 is a front view of the internal structure of the high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of the high-reliability high-voltage electric fire pump of the invention;
FIG. 2 is a side view of the internal structure of the high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of the high-reliability high-voltage electric fire pump of the invention;
FIG. 3 is a front view of the external structure of the high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of the high-reliability high-voltage electric fire pump of the invention;
fig. 4 is a wiring diagram of the switching circuit of the present invention.
In the figure: 1. a high-voltage control cabinet; 2. a double-throw isolating switch; 201. an incoming wire insulated terminal; 3. an upper static contact; 4. a lower static contact; 5. an upper cutter head; 6. a lower cutter head; 7. a double-crankshaft linkage mechanism; 701. a crankshaft; 702. a crankshaft crank; 703. a second link; 704. a top; 705. a rocker; 706. a clamping block; 8. a slider-crank mechanism; 801. a crank; 802. a slider; 9. a screw drive mechanism; 901. a mounting seat; 902. a screw motor; 903. a chute; 10. a first link; 11. a low-frequency inspection executor; 12. a low-frequency inspection power switch; 13. an AC contactor; 14. an inductive switch; 15. an auxiliary motor; 16. connecting blocks; 17. a push-pull rod; 18. a high voltage operating power supply; 19. a low-voltage low-frequency inspection power supply; 20. a fire pump outlet; 21. a manual operating mechanism; 22. the low-voltage low-frequency inspection safety compartment.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
The specific embodiments of the present invention are such that: as shown in fig. 1-4, a high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system, which comprises a high-voltage control cabinet 1, a high-voltage operation power supply 18 and a low-voltage low-frequency inspection power supply 19 which are arranged in the cabinet body, and a switching circuit which can switch the connected high-voltage operation power supply 18 and the low-voltage low-frequency inspection power supply 19, wherein a double-throw isolating switch 2 with a visible isolating breakpoint is arranged on the switching circuit, a routing inspection switching control system which can drive the double-throw isolating switch 2 to safely switch the connected high-voltage operation power supply 18 and the low-voltage low-frequency inspection power supply 19 is arranged in the cabinet body of the high-voltage control cabinet 1, and the high-voltage fire pump inspection system is established on the routing inspection switching control system and is. This high pressure fire control high pressure running power of high reliability patrols and examines power switching system with low pressure low frequency, can solve the fire pump safely, reliably and patrol and examine automation, the quick transition between two kinds of modes of state at high pressure fire control state and low pressure low frequency, has visible safe isolation breakpoint moreover, guarantees that safe isolation high pressure running power and low pressure low frequency patrol and examine the power, is convenient for observe the operation conditions of high-voltage board.
In the embodiment, an upper wire inlet end of the double-throw isolating switch 2 is connected with a high-voltage running power supply 18, a lower wire inlet end of the double-throw isolating switch 2 is connected with a low-voltage low-frequency inspection power supply 19, a wire outlet end in the middle of the double-throw isolating switch 2 is connected with a fire pump, and an upper cutter head 5 and a lower cutter head 6 which can be turned over are arranged on the wire outlet end in the middle of the double-throw isolating switch 2; the inspection switching control system can drive the upper cutter head 5 and the lower cutter head 6 to be turned in the same direction to switch the power supply accessed by the double-throw isolating switch 2.
In the embodiment, the double-throw isolating switch 2 is provided with a double-crankshaft linkage mechanism 7, and double-crankshaft rotation of the double-crankshaft linkage mechanism 7 can respectively drive the upper tool bit 5 and the lower tool bit 6 to overturn; the inspection switching control system can drive the double crankshafts of the double crankshaft linkage mechanism 7 to rotate forwards or reversely.
In this embodiment, the inspection switching control system includes a slider-crank mechanism 8 for driving the dual crankshafts of the dual crankshaft linkage mechanism 7 to rotate, an electric operating mechanism 9 for driving the slider of the slider-crank mechanism 8 to slide, and a low-frequency inspection actuator 11, and a crank of the slider-crank mechanism 8 is provided with a first connecting rod 10 for driving the dual cranks of the dual crankshaft linkage mechanism 7 to rotate.
When the double-throw isolating switch 2 is in a state that the upper cutter head 5 is switched on and the lower cutter head 6 is switched off, the high-voltage operating power supply 18 is switched on, the fire pump is in a fire-fighting ready state, and the fire pump is started immediately after receiving a fire-fighting signal; when the inspection switching control system receives an inspection signal and does not have a fire signal at the same time, the inspection switching control system drives the cutter head of the double-throw isolating switch 2 to turn over from an upper cutter closing state and a lower cutter opening state to an upper cutter opening state and a lower cutter closing state, the low-voltage and low-frequency inspection power supply 19 is connected at the moment, and the fire pump enters an inspection execution state; when the inspection is finished, the double-throw isolating switch 2 restores the states of 'upper cutter closing and lower cutter opening', is connected with a high-voltage power supply and is ready for fire control execution; when the fire pump is in the patrol and examine execution state, receive the fire control signal, interrupt immediately and patrol and examine the execution, double throw isolator 2 is switched into "upper slitter closes, lower slitter branch" state by "upper slitter divides, lower slitter closes", and the fire pump puts into high pressure running state simultaneously.
When the inspection switching control system receives the inspection signal and does not have a fire signal at the same time, the special condition on the spot is prevented, the inspection execution is confirmed manually, then a confirmation instruction is sent, the inspection switching control system sends out the instruction again, the electric operating mechanism runs, and the double-throw isolating switch 2 is converted into the upper cutter opening state and the lower cutter opening state from the upper cutter opening state and the lower cutter opening state.
In the present embodiment, the inspection changeover control system further includes a manual operation mechanism 21 that manually operates the slider sliding of the slider-crank mechanism 8.
In this embodiment, the switching circuit is provided with a low-frequency inspection power switch 12, an ac contactor 13 and a low-frequency inspection executor 11, and the low-frequency inspection executor 11 receives inspection or fire-fighting signals to control the work of the screw motor 902 and the auxiliary motor 15; the low-frequency inspection power switch 12 and the alternating-current contactor 13 control the on-off of the low-voltage low-frequency inspection power supply 19.
An upper static contact 3 and a lower static contact 4 which are communicated with a high-voltage fire-fighting power supply and a low-voltage low-frequency inspection power supply are respectively arranged on the upper wire inlet end and the lower wire inlet end of the double-throw isolating switch 2, and an upper tool bit 5 and a lower tool bit 6 can be respectively connected with the upper static contact 3 and the lower static contact 4.
In the high-reliability high-voltage fire-fighting high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system, the upper and lower wire inlet ends of a double-throw isolating switch 2 are respectively connected with a high-voltage operation power supply 18 and a low-voltage low-frequency inspection power supply 19, the wire outlet end of the middle part of the double-throw isolating switch 2 is connected with a fire pump wire outlet 20, an electric operating mechanism 9 is a screw rod transmission mechanism, a screw rod of the screw rod transmission mechanism rotates to drive a screw rod nut to move left and right, the screw rod nut drives a sliding block 802 of a crank sliding block mechanism 8 to slide, so that a crank 801 rotates to drive a first connecting rod 10 to swing up and down, the first connecting rod 10 drives double cranks of a double-crankshaft linkage mechanism 7 to rotate, and the double cranks of the double-crankshaft linkage mechanism 7 synchronously rotate to drive an upper cutter head 5 and a lower cutter head 6 to synchronously overturn, so that the, The lower static contact 4 is alternately switched on or switched off. The mutual switching between the high-voltage operation power supply 18 and the low-voltage low-frequency inspection power supply 19 is realized by controlling the positions of the upper cutter head 5 and the lower cutter head 6 through the double-crankshaft linkage mechanism 7, the operation is convenient and reliable, the switching speed is high, the automatic control can be realized by setting a controller to control the work of the screw rod transmission mechanism, and the high-voltage double-throw isolating switch 2 is introduced to separate the high-voltage operation power supply 18 and the low-voltage low-frequency inspection power supply 19, so that the isolation of the power supplies has visible safe breakpoints, and the high-voltage fire pump control system is in high-degree automation in inspection operation at ordinary times; the automatic and fast switching of the fire pump between the high-pressure fire fighting state and the low-pressure low-frequency polling state is safely and reliably realized.
In an initial state, the upper tool bit 5 and the upper static contact 3 are switched on, the lower tool bit 6 and the lower static contact 4 are switched off, the double-throw isolating switch 2 is in an upper tool closing state and a lower tool opening state, at the moment, the high-voltage operating power supply 18 and the fire pump outlet 20 are electrified to supply power to the fire pump, and the fire pump works at high power and is used for fire fighting work.
When the screw rod transmission mechanism drives the double crankshafts of the double-crankshaft linkage mechanism 7 to rotate through the crank block mechanism 8 so that the upper tool bit 5 and the lower tool bit 6 turn over downwards, the upper tool bit 5 and the upper static contact 3 are switched off, the lower tool bit 6 and the lower static contact 4 are switched on, the double-throw isolating switch 2 is switched from an upper tool closing state and a lower tool closing state into an upper tool closing state and a lower tool closing state, the low-voltage low-frequency inspection power supply 19 is communicated with the fire pump outlet wire 20 to supply power to the fire pump, the fire pump works at low power and is in a fire-fighting standby state of low-voltage low-frequency inspection, the fire pump is used for emergency fire fighting, and when a fire accident happens, the fire pump can be quickly started at. And the low-voltage low-frequency inspection power supply 19 is connected, and the fire pump enters an inspection execution state. When the fire pump is in polling, a fire signal is received, the fire pump immediately stops polling, the double crankshafts of the double-crankshaft linkage mechanism 7 rotate to enable the upper cutter head 5 and the lower cutter head 6 to turn upwards, when low-voltage and low-frequency polling is finished, the double-throw isolating switch 2 restores the states of upper cutter closing and lower cutter opening again, the power supply is switched to the high-voltage operating power supply 18, and after the high-voltage operating power supply 18 is connected, the fire pump starting operating state is executed to perform fire fighting work.
In this embodiment, the dual-crankshaft linkage mechanism 7 includes two cranks 701 arranged in parallel and a crankshaft crank 702 disposed at one end of the two cranks 701, a second connecting rod 703 is disposed between the two crankshaft cranks 702, two cranks 701 are both provided with a top 704 movably connected with the upper tool bit 5 and the lower tool bit 6, the outer end of the top 704 is slidably hinged with the upper tool bit 5 and the lower tool bit 6 to prevent the top 704 from being locked with the upper tool bit 5 and the lower tool bit 6, and the other end of the crankshaft 701 located below is provided with a rocker 705 hinged with the first connecting rod 10. The top 704 rotates along with the crankshaft 701, and can push and pull the upper tool bit 5 and the lower tool bit 6, so as to drive the upper tool bit 5 and the lower tool bit 6 to turn over.
The slider-crank mechanism 8 drives a crankshaft 701 below to rotate, the crankshaft cranks 702 on the two crankshafts 701 are driven to synchronously turn over through the second connecting rod 703, synchronous rotation of the two crankshafts 701 is achieved, and linkage can be achieved between the upper tool bit 5 and the lower tool bit 6.
In this embodiment, two incoming line ends of the double-throw disconnecting switch 2 are respectively provided with an incoming line insulating terminal 201 for installing an upper static contact 3 and a lower static contact 4, two incoming line ends of the double-throw disconnecting switch 2 are provided with the incoming line insulating terminal 201 for installing the upper static contact 3 and the lower static contact 4, the top terminal 704 is an insulating structure installed on the crankshaft 701, and an insulating structure is arranged between an outgoing line end in the middle of the double-throw disconnecting switch 2 and a body of the double-throw disconnecting switch 2; the end of the top 704 is provided with a fixture block 706 which is slidably connected with the upper tool bit 5 and the lower tool bit 6, the fixture block 706 and the upper tool bit 5 and the lower tool bit 6 can rotate relatively, and the upper tool bit 5 and the lower tool bit 6 are provided with guide grooves matched with the fixture block 706.
The upper tool bit 5 and the lower tool bit 6 respectively comprise two clamping plates which are arranged at intervals, a cushion block is arranged between the two clamping plates, clamping bolts are arranged at two ends of the two clamping plates, pressing springs which are matched with one sides of the clamping plates are arranged on the clamping bolts, one ends of the two clamping plates are hinged with the wire outlet end of the double-throw isolating switch 2 through the clamping bolts, the two clamping plates and the wire outlet end of the double-throw isolating switch 2 are clamped mutually by the pressing springs, and the two clamping plates are prevented from overturning due to the action of gravity or external vibration; the other ends of the two clamping plates penetrate through the cushion block through clamping bolts to position the two clamping plates, so that the distance between the two clamping plates is ensured; the latch 706 is disposed between the two clamping plates. Go up the static contact 3, be equipped with on the static contact 4 down with the protruding structure of the free end looks block of last tool bit 5, lower tool bit 6, protruding structure can insert the clearance that two splint are connected to closely laminate with two splint, two splint can press from both sides tightly on protruding structure through the elasticity of metal, and difficult separation prevents the condition of contact failure.
The fixture block 706 comprises an insertion part inserted between the two clamping plates and a cylinder penetrating through the insertion part, grooves matched with the cylinders on the two sides of the insertion part are formed in the inner sides of the two clamping plates, and the grooves extend along the length direction of the clamping plates.
In this embodiment, the screw transmission mechanism includes a mounting base 901, a screw motor 902 is disposed on the mounting base 901, a sliding slot 903 adapted to a sliding block 802 of the slider-crank mechanism 8 is disposed on the mounting base 901, and a screw nut of the screw transmission mechanism is connected to the sliding block 802; the crank 801 of the crank slider mechanism 8 is hinged to the mounting base 901. The lead screw of the lead screw motor 902 rotates to drive the lead screw nut to slide, so as to drive the slide block 802 to slide linearly, and the crank 801 rotates to drive the two crankshafts 701 of the double-crankshaft linkage mechanism 7 to rotate through the first connecting rod 10.
In this embodiment, two ends of the bottom of the mounting seat 901 are provided with two inductive switches 14 adapted to the slider 802 of the slider-crank mechanism 8, one end of the slider 802 is hinged to the crank 801, and the other end of the slider 802 can be induced by the two inductive switches 14, and when the slider 802 slides to the two ends and is induced by the inductive switches 14, it indicates that the slider 802 has slid in place, and the controller can control the lead screw motor 902 to stop working.
In this embodiment, an auxiliary driving mechanism capable of driving the crank 801 to rotate is disposed at the top of the mounting seat 901, the auxiliary driving mechanism includes an auxiliary motor 15 and a second connecting rod and rocker mechanism disposed on an output shaft of the auxiliary motor 15 and connected to the crank 801, the second connecting rod and rocker mechanism includes a connecting block 16 disposed on the output shaft of the auxiliary motor 15 and a push-pull rod 17 hinged to the crank 801 and disposed on the connecting block 16, the controller controls the screw rod transmission mechanism to operate and also controls the auxiliary motor 15 of the auxiliary driving mechanism to operate, the rotation of the output shaft of the auxiliary motor 15 can apply an acting force to the crank 801 through the connecting block 16 and the push-pull rod 17, so as to facilitate smooth rotation of the crank 801; the phenomenon of clamping between the screw nut on the screw motor 902 and the screw is prevented.
The manual operating mechanism 21 is a crank hole formed in the end portion of a screw rod of the screw rod transmission mechanism, and an operating rod can be inserted into the crank hole to rotate a screw rod of the screw rod motor 902, so that a screw rod nut is driven to move, and manual emergency operation is achieved.
The interior of the cabinet body of the high-voltage control cabinet 1 is respectively divided into a front part and a rear part which are separated by a clapboard; the high-voltage operation power supply 18 and the fire pump outlet 20 are arranged at the rear part, the low-voltage low-frequency inspection power supply 19, the double-throw isolating switch 2, the screw rod transmission mechanism and the like are arranged at the front part, so that a low-voltage line and a high-voltage line can be isolated from each other, namely, a low-voltage low-frequency inspection loop is arranged in an independent compartment and is completely isolated from a high-voltage electrified part, and the safety of equipment and operators is ensured; the low-frequency inspection executor 11, the low-frequency inspection power switch 12 and the alternating current contactor 13 are arranged in the low-voltage low-frequency inspection safety compartment 22 on one side of the bottom of the high-voltage control cabinet 1 and are separated from mechanical control mechanisms such as a screw rod transmission mechanism on the bottom of the high-voltage control cabinet 1, and interference is avoided.
The front part of the top of the high-voltage control cabinet 1 is provided with an operation panel which is a control panel commonly used in high-voltage cabinets. An alarm is arranged at the top end of the high-voltage control cabinet 1.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (7)
1. The utility model provides a power switching system is patrolled and examined to high-pressure electric fire pump high pressure operation power and low pressure low frequency of high reliability, includes high-voltage control cabinet (1), locates internal high pressure operation power (18) of cabinet and low pressure low frequency and patrol and examine power (19), its characterized in that still includes the switching circuit that can patrol and examine power (19) and carry out the switching to the high pressure operation power (18), the low pressure low frequency of inserting. The switching circuit is provided with a double-throw isolating switch (2) with a visible isolating breakpoint, and the high-voltage control cabinet (1) cabinet body is internally provided with a patrol inspection switching control system which can drive the double-throw isolating switch (2) to switch an accessed high-voltage running power supply (18) and a low-voltage low-frequency patrol inspection power supply (19).
2. The high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system according to claim 1, characterized in that an upper line inlet end of the double-throw isolating switch (2) is connected to a high-voltage operation power supply (18), a lower line inlet end of the double-throw isolating switch is connected to a low-voltage low-frequency inspection power supply (19), a line outlet end in the middle of the double-throw isolating switch (2) is connected to a high-voltage motor of the fire pump, and an upper cutter head (5) and a lower cutter head (6) which can be turned over are arranged on a line outlet end in the middle of the double-throw isolating; the inspection switching control system can drive the upper cutter head (5) and the lower cutter head (6) to overturn in the same direction to switch the power supply connected with the double-throw isolating switch (2).
3. The high-reliability high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of the high-voltage electric fire pump according to claim 2, wherein a double-crankshaft linkage mechanism (7) is arranged on the double-throw isolating switch (2), and double-crankshaft rotation of the double-crankshaft linkage mechanism (7) can respectively drive the upper tool bit (5) and the lower tool bit (6) to overturn; the inspection switching control system can drive the double crankshafts of the double crankshaft linkage mechanism (7) to rotate forwards or backwards.
4. The high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system according to claim 2 or 3, characterized in that the inspection switching control system comprises a crank block mechanism (8) for driving the double crank shaft rotation of the double crank shaft linkage mechanism (7), an electric operating mechanism (9) for driving the slide block of the crank block mechanism (8) to slide and a low-frequency inspection executor (11), and a crank of the crank block mechanism (8) is provided with a first connecting rod (10) for driving the double crank shaft rotation of the double crank shaft linkage mechanism (7).
5. The high-reliability high-voltage running power supply and low-voltage low-frequency inspection power supply switching system of the high-voltage electric fire pump according to claim 4, characterized in that when the double-throw isolating switch (2) is in a state that the upper cutter head (5) is switched on and the lower cutter head (6) is switched off, the high-voltage running power supply (18) is switched on, the fire pump is in a fire-fighting ready state, and when the fire pump receives a fire-fighting signal, the fire pump is started immediately; when the inspection switching control system receives an inspection signal and does not have a fire signal at the same time, the inspection switching control system drives the cutter head of the double-throw isolating switch (2) to turn over from an upper cutter closing state and a lower cutter opening state to an upper cutter opening state and a lower cutter closing state, at the moment, a low-voltage low-frequency inspection power supply (19) is connected, and the fire pump enters an inspection execution state; when the inspection is finished, the double-throw isolating switch (2) automatically restores the states of upper cutter closing and lower cutter opening again, is connected with a high-voltage power supply, and is ready for fire control execution; when the fire pump is in the patrol inspection execution state, the fire pump receives a fire signal, immediately interrupts patrol inspection execution, converts the double-throw isolating switch (2) from the state of 'upper cutter is divided and lower cutter is closed' into the state of 'upper cutter is closed and lower cutter is divided', and simultaneously, the fire pump is put into a high-pressure operation state.
6. The high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system according to claim 5, wherein the inspection switching control system further comprises a manual operation mechanism (21) for manually operating the sliding block sliding of the slider-crank mechanism (8).
7. The high-reliability high-voltage electric fire pump high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system according to claim 5, wherein a low-frequency inspection power switch (12), an alternating current contactor (13) and a low-frequency inspection executor (11) which are located in an independent safety compartment are arranged on the switching circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736780.9A CN110611307A (en) | 2019-08-10 | 2019-08-10 | High-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of high-voltage electric fire pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736780.9A CN110611307A (en) | 2019-08-10 | 2019-08-10 | High-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of high-voltage electric fire pump |
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| CN110611307A true CN110611307A (en) | 2019-12-24 |
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| CN201910736780.9A Withdrawn CN110611307A (en) | 2019-08-10 | 2019-08-10 | High-reliability high-voltage operation power supply and low-voltage low-frequency inspection power supply switching system of high-voltage electric fire pump |
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