Emergency fire protection device for elevator car

Abstract

The invention provides an emergency fire-fighting device for an elevator car, which belongs to the field of elevators and comprises an air supply pipe, a fan, a conveying pipe and an air inducing cavity. Wherein the conveying pipe is provided with a plurality of air holes communicated with the air inducing cavity in the height direction, a pressure valve is arranged in each air hole, the air inlet end of the fan is connected with a compensation pipe corresponding to the air holes in position, and the compensation pipe has an extending state and a contracting state. When the elevator car moves up and down along the elevator shaft, the compensation pipe at the air inlet end of the fan moves along the air hole distribution path in the conveying pipe all the time, and when the compensation pipe is in the stretching state, the air holes in the corresponding positions are covered with the compensation pipe, so that the fan can communicate with the air inducing cavity at any height, and the air inducing cavity is communicated with the air outlet. When the elevator is in an emergency state, fresh air outside the elevator shaft is extracted and conveyed into the elevator car, air in the elevator shaft cannot enter the air inducing cavity due to the fact that the pressure valve is arranged in the air hole which is not covered by the compensation pipe, and the quality of the air in the elevator car is guaranteed when the elevator is in the emergency state.

Description

Technical Field

[0001] The invention belongs to the technical field, and specifically refers to an elevator car emergency fire fighting device. Background Art

[0002] Elevator ventilation is an important part of ensuring the air quality, passenger comfort and safety in the elevator. By installing a fan in the elevator car to force the air in the car to flow, it can ensure good air quality and high passenger comfort in the elevator, and improve the overall safety and reliability of the elevator.

[0003] Since the elevator car moves up and down in the elevator shaft, current elevator car ventilation uses the airflow in the elevator shaft for air exchange. In an emergency, the air in the elevator shaft may not meet the air exchange requirements. For example, in the event of a fire, there may be a large amount of smoke and dust in the elevator shaft, and the fan may send the smoke and dust into the car, causing danger. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an elevator car emergency fire fighting device, which at least partially solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes an elevator car emergency fire fighting device, comprising: An air supply pipe is arranged on the car, and a fan is arranged on the air supply pipe; A delivery pipe is vertically arranged in the elevator shaft, wherein an air induction cavity is arranged in the delivery pipe, an air induction duct is arranged at the top of the delivery pipe, one end of the air induction duct is connected to the air induction cavity, and the other end of the air induction duct extends to the outside of the elevator shaft; The conveying pipe is provided with a plurality of air holes connected with the air induction cavity along the height direction, and a pressure valve is provided in the air hole. The air inlet end of the fan is connected with a compensation tube corresponding to the air hole, and the compensation tube is provided with an extended state and a contracted state. When the compensation tube is in the extended state, the air hole at the corresponding position is covered by the compensation tube, so that the fan can extract the air in the air induction cavity at any height; An electric push rod is arranged on the car, and the telescopic end of the electric push rod is connected to the compensation tube, so that the electric push rod can drive the compensation tube to be telescopic.

[0006] Furthermore, it also includes a water distribution pipe, a first water pump and a water supply module for supplying water to the first water pump. The water distribution pipe is arranged on the car, and the output end of the first water pump is connected to the water distribution pipe.

[0007] Further, a water storage cavity is provided in the delivery pipe, a water diversion pipe is provided at the top of the delivery pipe, one end of the water diversion pipe is connected to the water storage cavity, and the other end of the water diversion pipe is connected to the water supply module, the delivery pipe is provided with a plurality of water holes connected to the water storage cavity along the height direction, the pressure valve is provided in each of the water holes, and the input end of the first water pump is connected to a hose corresponding to the position of the water hole; The hose is provided with an extended state and a contracted state. When the hose is in the extended state, the water holes at the corresponding positions are covered, so that the first water pump can extract water in the water storage chamber at any height.

[0008] Furthermore, the first water pump is connected to the telescopic end of the electric push rod, so that the electric push rod can drive the hose to be telescopic.

[0009] Furthermore, a sealing ring is provided on the end surface of the corresponding end of the compensation pipe and the delivery pipe.

[0010] Furthermore, one end of the hose corresponding to the delivery pipe is configured to be waist-shaped, and a sealing ring is provided at the end surface.

[0011] Furthermore, the pressure valve includes a circular tube and a sealing gasket, a delivery hole and a discharge hole are coaxially arranged in the circular tube, the diameter of the sealing gasket is larger than the inner diameter of the delivery hole and smaller than the inner diameter of the discharge hole, the sealing gasket is located in the discharge hole, and a spring for applying tension to the sealing gasket is arranged in the delivery hole, so that the spring can seal the delivery hole.

[0012] Furthermore, the spring is a plastic-sprayed spring.

[0013] Furthermore, the water supply module includes a water tank and a second water pump, the water diversion pipe is connected to the water tank, the input end of the second water pump is connected to an external water source, and the output end of the second water pump is connected to the water tank for replenishing water into the water tank.

[0014] Furthermore, a liquid level gauge for monitoring the water level is provided in the water tank.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: 1. A delivery pipe is arranged along the elevator shaft, and an air induction cavity connected to the air outside the elevator shaft is provided in the delivery pipe. A plurality of air holes connected to the air induction cavity are provided along the height direction of the delivery pipe. At the same time, a fan with a compensating pipe at the air inlet end is provided on the elevator car. When the elevator car moves up and down along the elevator shaft, the compensating pipe at the air inlet end of the fan always moves along the air hole distribution path on the delivery pipe. In an emergency, the fan can be connected to the air induction cavity at any height to extract fresh air from the outside of the elevator shaft and transport it to the elevator car; 2. A water storage chamber is provided in the delivery pipe, and a plurality of water holes connected to the water storage chamber are provided in the delivery pipe along the height direction. At the same time, a first water pump with a hose at the input end is provided on the elevator car. When the elevator car moves up and down along the elevator shaft, the hose at the input end of the first water pump always moves along the distribution path of the water holes, so that the first water pump can extract water from the water storage chamber at any height and deliver it to the elevator car for spraying, thereby playing a role in extinguishing fire; 3. The induced draft chamber and the water storage chamber are arranged side by side in the conveying pipe and are separated only by a partition. When the fan draws air through the induced draft chamber, the water in the water storage chamber can exchange heat with the airflow, playing a role in cooling the air, thereby reducing the temperature of the air delivered by the fan to the car, thereby reducing the temperature in the car and improving the comfort of the personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an elevator car emergency fire fighting device proposed in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of an air supply pipe and a water distribution pipe in an elevator car emergency fire fighting device proposed in an embodiment of the present invention; Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 A top view of an elevator car emergency fire fighting device proposed in an embodiment of the present invention; Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle; Figure 6 A schematic diagram of the structure of a delivery pipe in an elevator car emergency fire-fighting device proposed in an embodiment of the present invention; Figure 7 A schematic diagram of the structural disassembly of a delivery pipe in an elevator car emergency fire-fighting device proposed in an embodiment of the present invention; Figure 8 From top to bottom, the schematic diagrams are of the states of the pressure valve being closed and the pressure valve being opened; Fig. 9 The present invention is a schematic diagram of control module signal connections in an elevator car emergency fire fighting device according to an embodiment of the present invention.

[0017] Among them, 1. air supply duct; 11. fan; 12. compensation pipe; 2. delivery pipe; 21. induced air duct; 22. water duct; 201. induced air chamber; 202. water storage chamber; 203. air hole; 204. water hole; 3. pressure valve; 31. round tube; 32. spring; 33. sealing gasket; 301. delivery hole; 302. discharge hole; 4. electric push rod; 5. water distribution pipe; 6. first water pump; 61. hose; 7. water supply module; 71. water tank; 72. second water pump; 73. liquid level meter; 8. control module; 9. emergency power supply.

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0021] like Figure 1 As shown, the present invention proposes an elevator car emergency fire fighting device, including an air supply pipe 1 and a delivery pipe 2.

[0022] The air supply duct 1 is arranged on the car, and the elevator car is provided with a corresponding air inlet channel. The air supply duct 1 is connected to the air inlet channel of the elevator car. A fan 11 is provided on the air supply duct 1. When the elevator is operating normally, the fan 11 is used to draw air in the elevator shaft, and then supply air to the elevator car through the air supply duct 1.

[0023] Further, the delivery pipe 2 is vertically arranged in the elevator shaft, and an air induction cavity 201 is arranged in the delivery pipe 2. An air induction duct 21 is arranged at the top of the delivery pipe 2. One end of the air induction duct 21 is connected to the air induction cavity 201, and the other end of the air induction duct 21 extends to the outside of the elevator shaft. Through the air induction duct 21, the air induction cavity 201 in the delivery pipe 2 is connected to the air outside the elevator shaft. The delivery pipe 2 is provided with a plurality of air holes 203 in communication with the air induction chamber 201 along the height direction. A pressure valve 3 is provided in each of the air holes 203. The pressure valve 3 is a one-way valve that can be opened in one direction under a certain pressure. The setting of the pressure valve 3 blocks the air holes 203 in one direction, and the air in the elevator shaft cannot enter the air induction chamber 201 of the delivery pipe 2. The air inlet end of the fan 11 is connected to a compensating tube 12 whose position corresponds to the air hole 203. The compensating tube 12 is provided with an extended state and a contracted state. When the compensating tube 12 is in the extended state, the air hole 203 at the corresponding position is covered by the compensating tube 12. When the fan 11 is started, a negative pressure suction is formed at the air inlet end of the fan 11. Under the action of the negative pressure, the pressure valve 3 in the air hole 203 covered by the compensating tube 12 opens, and the air inlet end of the fan 11 is connected to the air induced cavity 201, and fresh air is drawn from the outside of the elevator shaft through the air induced cavity 201 and the air induced cavity 201 and the air induced tube 21.

[0024] In this way, when the elevator car moves up and down along the elevator shaft, the compensating pipe 12 at the air inlet end of the fan 11 always moves along the distribution path of the air holes 203 on the conveying pipe 2, so that the fan 11 can be connected with the draft chamber 201 at any height to extract fresh air from the outside of the elevator shaft. When the elevator stops running in an emergency state, the compensating pipe 12 switches to the extended state, and the air holes 203 at the corresponding positions are covered by the compensating pipe 12. The negative pressure formed by the air suction at the air inlet end of the fan 11 causes the pressure valve 3 in the air holes 203 covered by the compensating pipe 12 to open, and the air inlet end of the fan 11 is connected with the draft chamber 201, and fresh air from the outside of the elevator shaft is extracted through the draft chamber 201 and the draft pipe 21. Since the pressure valve 3 is set in the air holes 203 not covered by the compensating pipe 12, the air in the elevator shaft cannot enter the draft chamber 201, thereby ensuring the air quality in the elevator car when the elevator is in an emergency state.

[0025] In a specific embodiment, an electric push rod 4 is provided on the elevator car, and the compensating tube 12 is connected to the telescopic end of the electric push rod 4, and the telescopic end of the electric push rod 4 is used to drive the compensating tube 12 to extend and retract.

[0026] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention also includes a water distribution pipe 5, a first water pump 6 and a water supply module 7 for supplying water to the first water pump 6. The water distribution pipe 5 is arranged on the car. The water distribution pipe 5 is provided with a plurality of output ends equipped with sprinkler heads and extends to the interior of the elevator car. The output end of the first water pump 6 is connected to the water distribution pipe 5. The first water pump 6 is utilized to pump water and spray water into the elevator car through the water distribution pipe 5 to achieve the effect of fire extinguishing.

[0027] A water storage chamber 202 is provided in the delivery pipe 2, and a water diversion pipe 22 is provided at the top of the delivery pipe 2. One end of the water diversion pipe 22 is connected to the water storage chamber 202, and the other end of the water diversion pipe 22 is connected to the water supply module 7, so that the water supply module 7 can deliver water to the water storage chamber 202 in the delivery pipe 2; The delivery pipe 2 is provided with a plurality of water holes 204 in communication with the water storage chamber 202 along the height direction, and each of the water holes 204 is provided with a pressure valve 3, which is a one-way valve that can be opened in one direction under a certain pressure. The setting of the pressure valve 3 blocks the water hole 204 to avoid water leakage; The input end of the first water pump 6 is connected to a hose 61 whose position corresponds to the water hole 204. The hose 61 has an extended state and a contracted state. When the hose 61 is in the extended state, the water hole 204 at the corresponding position is covered. When the first water pump 6 is started, a negative pressure is formed at the input end of the first water pump 6 to pump water. Under the action of the negative pressure, the pressure valve 3 in the water hole 204 covered by the hose 61 opens, so that the first water pump 6 can extract water from the water storage chamber 202.

[0028] In this way, when the elevator car moves up and down along the elevator shaft, the hose 61 at the input end of the first water pump 6 always moves along the distribution path of the water holes 204, so that the first water pump 6 can extract water from the water storage chamber 202 at any height. When a fire occurs in the elevator car, the hose 61 switches to an extended state, and the water holes 204 at the corresponding positions are covered. A negative pressure is formed at the input end of the first water pump 6, so that the pressure valve 3 in the water hole 204 covered by the hose 61 opens, and the first water pump 6 extracts water from the water storage chamber 202, and pumps water into the elevator car through the water distribution pipe 5 for spraying, thereby playing a role in extinguishing the fire.

[0029] Combination Figure 7 As shown, the air induced chamber 201 and the water storage chamber 202 are arranged side by side in the conveying pipe 2 and are separated only by a partition. When the fan 11 draws air through the air induced chamber 201, the water in the water storage chamber 202 can exchange heat with the airflow, playing a role in cooling the air, thereby reducing the temperature of the air conveyed by the fan 11 to the car, thereby reducing the temperature in the car and improving the comfort of the occupants.

[0030] In an optional embodiment, by setting the partition between the air induction chamber 201 and the water storage chamber 202 to a wave shape or a sawtooth shape, the heat exchange area between air and water can be increased, thereby improving the cooling effect on the air.

[0031] Furthermore, there is no restriction on the length of the delivery pipe 2, so that the lengths of the air induction chamber 201 and the water storage chamber 202 can eventually correspond to the travel of the car.

[0032] In a specific embodiment, the water supply module 7 includes a water tank 71 and a second water pump 72. The water diversion pipe 22 is connected to the water tank 71. The water tank 71 uses gravity to transport water to the water storage chamber 202 through the water diversion pipe 22. The input end of the second water pump 72 is connected to an external water source, and the output end of the second water pump 72 is connected to the water tank 71 for replenishing water into the water tank 71 so that there is always sufficient water in the water tank 71.

[0033] Furthermore, a liquid level gauge 73 for monitoring the water level is provided in the water tank 71 . The liquid level gauge 73 is used to monitor the water level in the water tank 71 in real time, and the second water pump 72 is controlled to replenish water into the water tank 71 according to a preset water level.

[0034] It should be understood that the preset water level of the liquid level meter 73 is 2 / 3 of the capacity of the water tank 71. When the water level of the water tank 71 is lower than 2 / 3 of the capacity of the water tank 71, the second water pump 72 is controlled to replenish water into the water tank 71. When the water level of the water tank 71 is higher than 2 / 3 of the capacity of the water tank 71, the second water pump 72 is turned off.

[0035] Furthermore, the first water pump 6 is connected to the telescopic end of the electric push rod 4 , and the telescopic end of the electric push rod 4 is used to drive the hose 61 to extend and retract.

[0036] Combination Figure 3 As shown, a sealing ring is provided on the end face of the compensation pipe 12 corresponding to the conveying pipe 2. When the compensation pipe 12 contacts the conveying pipe 2, the sealing ring plays a sealing role, maintaining the negative pressure at the air inlet end of the fan 11 and preventing the air in the elevator shaft from being sucked in.

[0037] Furthermore, one end of the hose 61 corresponding to the delivery pipe 2 is configured to be waist-shaped to increase the coverage area, and a sealing ring is provided at the end face. When the end face of the hose 61 contacts the delivery pipe 2, the sealing ring plays a sealing role, avoiding water leakage when the first water pump 6 pumps water.

[0038] Combination Figure 8 As shown, the pressure valve 3 includes a round tube 31 and a sealing gasket 33. A delivery hole 301 and a discharge hole 302 are coaxially arranged in the round tube 31. The diameter of the sealing gasket 33 is larger than the inner diameter of the delivery hole 301 and smaller than the inner diameter of the discharge hole 302. The sealing gasket 33 is located in the discharge hole 302. A spring 32 for applying tension to the sealing gasket 33 is arranged in the delivery hole 301, so that the spring 32 can seal the delivery hole 301. During installation, one end of the discharge hole 302 faces the outside of the delivery pipe 2, and the spring 32 applies a pulling force to the sealing gasket 33 to move toward the delivery hole 301, so that the sealing gasket 33 is tightened on the end face of the delivery hole 301. At this time, the two ends of the pressure valve 3 are not connected and are in a closed state. When the fan 11\first water pump 6 is started, under the action of negative pressure, the sealing gasket 33 is separated from the end face of the delivery hole 301. At this time, the two ends of the pressure valve 3 are connected, and the pressure valve 3 is in an open state.

[0039] In an optional embodiment, the spring 32 is a plastic-sprayed spring. The plastic-sprayed coating on the surface of the plastic-sprayed spring can improve the corrosion resistance of the spring, so that the spring 32 is not easy to rust when used for a long time in a water environment, and has a long service life.

[0040] Combination Fig. 9As shown, it should be understood that the fan 11, the first water pump 6, the electric push rod 4, the second water pump 72 and the liquid level meter 73 in the water supply module 7 are all connected to the control module 8 by signal, and the above-mentioned devices are all connected to the emergency power supply 9. When the mains power is normal, the above-mentioned devices are all powered by the mains power. When the mains power is abnormal, they are powered by the emergency power supply 9. The control module 8 controls the operation of the fan 11, the electric push rod 4, the first water pump 6 and the second water pump 72 based on preset logic or strategy.

[0041] In an optional embodiment, the aforementioned control logic or strategy includes: When the elevator's own fire alarm system detects a fire in the elevator shaft or the mains power is cut off, the electric push rod 4 extends and the fan 11 starts to deliver fresh air to the car; When the elevator's own fire alarm system detects a fire in the car, the electric push rod 4 extends, and the fan 11 and the first water pump 6 are started to deliver fresh air to the car and extinguish the fire at the same time; When the liquid level meter 73 detects that the water level in the water tank 71 is lower than 2 / 3 of the capacity of the water tank 71 , the second water pump 72 is controlled to replenish water into the water tank 71 .

[0042] In a specific embodiment, the control module 8 is implemented based on an industrial computer or an embedded control system.

[0043] In an optional embodiment, the emergency power supply 9 adopts one of a power generation equipment and a battery, preferably a battery. When the mains power is normal, the battery is in a storage state. When the mains power is abnormal, the battery switches to a discharge state. The battery is easy to maintain and has stable performance.

[0044] In summary of the above embodiments: a delivery pipe 2 is arranged along the elevator shaft, and an air induction cavity 201 connected to the air outside the elevator shaft is provided in the delivery pipe 2. A plurality of air holes 203 connected to the air induction cavity 201 are provided in the delivery pipe 2 along the height direction. At the same time, a fan 11 with a compensation pipe 12 at the air inlet end is provided on the elevator car. When the elevator car moves up and down along the elevator shaft, the compensation pipe 12 at the air inlet end of the fan 11 always moves along the distribution path of the air holes 203 on the delivery pipe 2. In an emergency, the fan 11 can be connected to the air induction cavity 201 at any height to extract fresh air from the outside of the elevator shaft and transport it into the elevator car. A water storage chamber 202 is provided in the delivery pipe 2, and a plurality of water holes 204 communicating with the water storage chamber 202 are provided in the delivery pipe 2 along the height direction. Meanwhile, a first water pump 6 having a hose 61 at the input end is provided on the elevator car. When the elevator car moves up and down along the elevator shaft, the hose 61 at the input end of the first water pump 6 always moves along the distribution path of the water holes 204, so that the first water pump 6 can extract water in the water storage chamber 202 at any height and deliver it to the elevator car for spraying, thereby playing a role in extinguishing fire. The air induced draft chamber 201 and the water storage chamber 202 are arranged side by side in the conveying pipe 2 and are separated only by a partition. When the fan 11 draws air through the air induced draft chamber 201, the water in the water storage chamber 202 can exchange heat with the airflow, thereby cooling the air, thereby reducing the temperature of the air conveyed by the fan 11 to the car, thereby reducing the temperature in the car and improving the comfort of the occupants.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0047] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An elevator car emergency fire fighting device, characterized in that: include: An air supply pipe (1) is arranged on the car, and a fan (11) is provided on the air supply pipe (1); A delivery pipe (2) is vertically arranged in the elevator shaft, an air induction cavity (201) is provided in the delivery pipe (2), an air induction pipe (21) is provided at the top end of the delivery pipe (2), one end of the air induction pipe (21) is connected to the air induction cavity (201), and the other end of the air induction pipe (21) extends to the outside of the elevator shaft; The conveying pipe (2) is provided with a plurality of air holes (203) in a height direction and in communication with the air induction cavity (201); a pressure valve (3) is provided in the air hole (203); an air inlet end of the fan (11) is connected with a compensation pipe (12) whose position corresponds to the air hole (203); the compensation pipe (12) has an extended state and a contracted state; when the compensation pipe (12) is in the extended state, the air hole (203) at the corresponding position is covered by the compensation pipe (12), so that the fan (11) can extract air in the air induction cavity (201) at any height; An electric push rod (4) is arranged on the car, and the telescopic end of the electric push rod (4) is connected to the compensation tube (12), so that the electric push rod (4) can drive the compensation tube (12) to telescope.

2. The elevator car emergency fire fighting device according to claim 1, characterized in that: It also includes a water distribution pipe (5), a first water pump (6), and a water supply module (7) for supplying water to the first water pump (6); the water distribution pipe (5) is arranged on the car, and the output end of the first water pump (6) is connected to the water distribution pipe (5).

3. The elevator car emergency fire fighting device according to claim 2, characterized in that: A water storage cavity (202) is provided in the delivery pipe (2), a water diversion pipe (22) is provided at the top end of the delivery pipe (2), one end of the water diversion pipe (22) is connected to the water storage cavity (202), and the other end of the water diversion pipe (22) is connected to the water supply module (7); a plurality of water holes (204) connected to the water storage cavity (202) are provided in the delivery pipe (2) along the height direction, the pressure valve (3) is provided in each of the water holes (204), and a hose (61) whose position corresponds to the water hole (204) is connected to the input end of the first water pump (6); The hose (61) has an extended state and a contracted state. When the hose (61) is in the extended state, the water holes (204) at the corresponding positions are covered, so that the first water pump (6) can extract water from the water storage chamber (202) at any height.

4. The elevator car emergency fire fighting device according to claim 3, characterized in that: The first water pump (6) is connected to the telescopic end of the electric push rod (4), so that the electric push rod (4) can drive the hose (61) to telescope.

5. The elevator car emergency fire fighting device according to claim 1, characterized in that: The end surfaces of the compensating pipe (12) and the delivery pipe (2) corresponding to one end are provided with sealing rings.

6. The elevator car emergency fire fighting device according to claim 3, characterized in that: One end of the hose (61) corresponding to the delivery pipe (2) is configured to be waist-shaped, and a sealing ring is provided on the end surface.

7. The elevator car emergency fire fighting device according to claim 3, characterized in that: The pressure valve (3) comprises a round tube (31) and a sealing gasket (33); a delivery hole (301) and a discharge hole (302) are coaxially arranged in the round tube (31); the diameter of the sealing gasket (33) is larger than the inner diameter of the delivery hole (301) and smaller than the inner diameter of the discharge hole (302); the sealing gasket (33) is located in the discharge hole (302); a spring (32) for applying a tensile force to the sealing gasket (33) is arranged in the delivery hole (301), so that the spring (32) can seal the delivery hole (301).

8. The elevator car emergency fire fighting device according to claim 7, characterized in that: The spring (32) is a plastic-sprayed spring.

9. The elevator car emergency fire fighting device according to claim 3, characterized in that: The water supply module (7) comprises a water tank (71) and a second water pump (72); the water diversion pipe (22) is in communication with the water tank (71); the input end of the second water pump (72) is connected to an external water source; the output end of the second water pump (72) is connected to the water tank (71) for replenishing water into the water tank (71).

10. The elevator car emergency fire fighting device according to claim 9, characterized in that: A liquid level meter (73) for monitoring the water level is provided in the water tank (71).

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