Elevator weight balance adjusting structure

Abstract

The invention discloses an elevator weight balance adjusting structure, and relates to the field of elevators, the elevator weight balance adjusting structure comprises an elevator car main body and a counterweight, and a first storage tank is mounted on one side of the bottom of the elevator car main body; according to the elevator weight balance adjusting structure, the first storage tank, the first buffer tank, the second storage tank and the second buffer tank are symmetrically arranged at the bottom of the elevator car body and the counterweight, and the first main pump, the second main pump, the first auxiliary pump and the second auxiliary pump work cooperatively; the first electromagnetic three-way valve and the second electromagnetic three-way valve form a two-way liquid conveying channel through the connecting pipe, so that the system can adjust liquid distribution in real time according to the weight difference between the lift car and the counterweight, the main pump is responsible for high-pressure liquid conveying to achieve rapid balance, and the auxiliary pump generates negative pressure through the buffer tank to assist in conveying; the electromagnetic three-way valve accurately controls the flow direction of liquid, all pipelines are directly connected or connected in an inserted mode to ensure the sealing performance, and therefore the effect of dynamically adjusting the moment balance of the lift car and the two sides of the counterweight is achieved.

Description

Technical Field

[0001] The present invention relates to elevator technology, in particular to an elevator weight balance adjustment structure. Background Art

[0002] As a core component of modern vertical transportation, elevator technology has formed a highly mature industrial system after more than a hundred years of development. From early mechanical balancing systems to contemporary electronic control and hydraulic hybrid adjustment devices, elevator balancing technology has always been continuously optimized around the three major goals of improving operational smoothness, reducing energy consumption and extending equipment life. The current mainstream technology adopts a combination of physical balancing of the counterweight and variable frequency speed regulation drive. By accurately calculating the static difference between the car load and the counterweight mass, relative balance is achieved in conjunction with the traction machine torque adjustment. However, the counterweight designed for the elevator is fixed to the weight of half the car load, and the number of passengers in the car is random, so it is difficult to achieve weight balance between the car and the counterweight. In recent years, with the surge in high-rise buildings and the expansion of demand for ultra-high-speed elevators, dynamic weight compensation technology has gradually become a research hotspot. Some advanced systems can already monitor load changes in real time through sensors and use hydraulic or electromagnetic devices for micro-adjustments.

[0003] When the existing elevator weight balancing system is in use, after detecting the load through a sensor, it needs to be analyzed by the control unit and then drive the actuator (such as a hydraulic pump or motor) to adjust the balance. This process involves signal conversion delays and cumulative mechanical transmission errors. For example, the hydraulic system is affected by the compressibility of the liquid. It usually takes several seconds from detecting overweight to completing the liquid transfer. The motor torque adjustment scheme is limited by the gearbox transmission ratio and the back electromotive force effect, making it difficult to achieve millisecond-level response. This time difference will aggravate the fluctuation of the friction coefficient between the traction wheel and the wire rope in high-frequency start-stop scenarios, resulting in local overheating of the contact surface and material fatigue, so it needs to be improved. Summary of the Invention

[0004] The object of the present invention is to provide an elevator weight balance adjustment structure to solve the response hysteresis problem in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: an elevator weight balance adjustment structure, comprising a car body and a counterweight, a first storage tank being installed on one side of the bottom of the car body, a first buffer tank being installed on the other side of the bottom of the car body, a first main pump being installed on one side of the bottom of the first storage tank, a first extraction pipe being installed at the input end of the first main pump, and a top end of the first extraction pipe being installed at the bottom of the first storage tank, a first delivery pipe being installed at the output end of the first main pump, a first electromagnetic three-way valve being installed at the bottom end of the first delivery pipe, a first auxiliary pump being installed on one side of the bottom of the first buffer tank, a second extraction pipe being installed at the input end of the first auxiliary pump, and the bottom end of the second extraction pipe being installed at the inner wall of the first buffer tank, a second delivery pipe being installed at the output end of the first auxiliary pump, and the top end of the second delivery pipe being installed at one side of the first storage tank, a third delivery pipe being installed on the surface of the first electromagnetic three-way valve, and the top end of the third delivery pipe being plugged into the inner wall of the first buffer tank;

[0006] A second storage tank is installed on one side of the bottom of the counterweight, and a second buffer tank is installed on the other side of the bottom of the counterweight, a second main pump is installed on one side of the bottom of the second storage tank, a third extraction pipe is installed at the input end of the second main pump, and the top end of the third extraction pipe is installed at the bottom of the second storage tank, a fourth delivery pipe is installed at the output end of the second main pump, and a second electromagnetic three-way valve is installed at the bottom end of the fourth delivery pipe, a second auxiliary pump is installed on one side of the bottom of the second buffer tank, a fourth extraction pipe is installed at the input end of the second auxiliary pump, and the bottom end of the fourth extraction pipe is installed at the inner wall of the second buffer tank, a fifth delivery pipe is installed at the output end of the second auxiliary pump, and the top end of the fifth delivery pipe is installed at one side of the second storage tank, a sixth delivery pipe is installed on the surface of the second electromagnetic three-way valve, and the top end of the sixth delivery pipe is plugged into the inner wall of the second buffer tank;

[0007] A connecting pipe is installed at the bottom end of the first electromagnetic three-way valve, and a top end of the connecting pipe is installed at the bottom end of the second electromagnetic three-way valve.

[0008] Furthermore, a first weight sensor is installed at the bottom of the car body, and a second weight sensor is installed at the bottom of the counterweight.

[0009] Furthermore, a first return pulley is fixedly connected to the top of the car body, and a second return pulley is fixedly connected to the top of the counterweight.

[0010] Furthermore, a fixed bottom plate is provided above the car body, a gear box is fixedly connected to the top of the fixed bottom plate, a traction machine is fixedly connected to one side of the gear box, and a rotating disk is installed at the output end of the gear box.

[0011] Furthermore, a steel wire rope is rotatably connected to the surface of the rotating disk, and the surface of the steel wire rope is rotatably connected to the surfaces of the first deflection pulley and the second deflection pulley.

[0012] Furthermore, the surface of the steel wire rope is rotatably connected to a guide wheel, and the guide wheel is located on a side close to the second deflecting pulley.

[0013] Furthermore, a gate is slidably connected to the surface of the car body.

[0014] Compared with the prior art, the present invention provides an elevator weight balance adjustment structure, which is configured with a first storage tank, a first buffer tank, a second storage tank, and a second buffer tank symmetrically arranged at the bottom of the car body and the counterweight. The two storage tanks store a total of liquid equal to half the load of the elevator. The coordinated work of the first main pump, the second main pump, the first auxiliary pump and the second auxiliary pump, as well as the bidirectional liquid transmission channel formed by the first electromagnetic three-way valve and the second electromagnetic three-way valve through the connecting pipe enable the system to adjust the liquid distribution in real time according to the weight difference between the car and the counterweight. The main pump is responsible for high-pressure liquid delivery to achieve rapid balance, and the auxiliary pump assists in transmission by extracting liquid from the buffer tank to generate negative pressure, and maintains controllable liquid level in the buffer tank. The buffer tank uses thickened material to form negative pressure, and the storage tank uses ordinary material with a vent hole on the top. The electromagnetic three-way valve accurately controls the flow direction of the liquid, and all pipelines are directly connected or plugged in to ensure sealing, thereby achieving the effect of dynamically adjusting the weight balance between the car and the counterweight. It effectively solves the problems of traction sheave wear, operation vibration and excessive braking load caused by weight imbalance in traditional elevators. Even in the extreme case of simultaneous failure of the speed limiter, brakes on both sides and star-sealing relay, the elevator will not squat to the bottom or rush to the top at a high speed because the weight of the car and the counterweight is basically equal. When unexpected movement of the car is detected, the main and auxiliary pumps can be started for emergency compensation, which significantly improves the stability and safety of the elevator operation.

[0015] By installing the first weight sensor and the second weight sensor on the car body and the bottom of the counterweight respectively, the load changes are monitored in real time and fed back to the control system. Combined with the traction effect of the first return pulley on the top of the car and the second return pulley on the top of the counterweight on the wire rope, the traction machine on the fixed bottom plate drives the rotating disk through the gearbox to drive the wire rope to circulate, the guide wheel constrains the wire rope trajectory to prevent deviation, and the gate is linked with the floor leveling signal to ensure safe opening and closing, so that the system can accurately sense the weight difference and respond quickly. The return pulley and wire rope system efficiently transmits traction force, the guide wheel ensures transmission accuracy, and the gate realizes safe isolation of the elevator passengers, thereby achieving the effect of closed-loop control of the elevator operation status, further optimizing the real-time and accuracy of weight adjustment, while enhancing the adaptability of the elevator under complex working conditions, and comprehensively improving ride comfort and equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 One of the overall structural diagrams provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a traction machine provided in an embodiment of the present invention;

[0019] Figure 3 The second schematic diagram of the overall structure provided by the embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the main structure of the elevator car provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the counterweight structure provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of a first electromagnetic three-way valve provided in an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Car body; 2. Counterweight; 3. First storage tank; 4. First buffer tank; 5. First main pump; 6. First extraction pipe; 7. First delivery pipe; 8. First solenoid three-way valve; 9. First auxiliary pump; 10. Second extraction pipe; 11. Second delivery pipe; 12. Third delivery pipe; 13. Second storage tank; 14. Second buffer tank; 15. Second main pump; 16. Third extraction pipe; 17. Fourth delivery pipe; 18. Second solenoid three-way valve; 19. Second auxiliary pump; 20. Fourth extraction pipe; 21. Fifth delivery pipe; 22. Sixth delivery pipe; 23. Connecting pipe; 24. First weight sensor; 25. Second weight sensor; 26. First return pulley; 27. Second return pulley; 28. Fixed base plate; 29. ​​Gearbox; 30. Traction machine; 31. Rotating plate; 32. Wire rope; 33. Guide wheel; 34. Gate. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To the attached Figure 6 As shown:

[0027] Example 1:

[0028] The present invention provides an elevator weight balance adjustment structure, comprising a car body 1 and a counterweight 2, a first storage tank 3 being installed on one side of the bottom of the car body 1, a first buffer tank 4 being installed on the other side of the bottom of the car body 1, a first main pump 5 being installed on one side of the bottom of the first storage tank 3, a first extraction pipe 6 being installed at the input end of the first main pump 5, and a top end of the first extraction pipe 6 being installed at the bottom of the first storage tank 3, a first delivery pipe 7 being installed at the output end of the first main pump 5, a first electromagnetic three-way valve 8 being installed at the bottom end of the first delivery pipe 7, a first auxiliary pump 9 being installed on one side of the bottom of the first buffer tank 4, a second extraction pipe 10 being installed at the input end of the first auxiliary pump 9, and a bottom end of the second extraction pipe 10 being installed at the inner wall of the first buffer tank 4, a second delivery pipe 11 being installed at the output end of the first auxiliary pump 9, and a top end of the second delivery pipe 11 being installed at one side of the first storage tank 3, a third delivery pipe 12 being installed on the surface of the first electromagnetic three-way valve 8, and a top end of the third delivery pipe 12 being plugged into the inner wall of the first buffer tank 4;

[0029] A second storage tank 13 is installed on one side of the bottom of the counterweight 2, and a second buffer tank 14 is installed on the other side of the bottom of the counterweight 2. A second main pump 15 is installed on one side of the bottom of the second storage tank 13. A third extraction pipe 16 is installed at the input end of the second main pump 15, and the top end of the third extraction pipe 16 is installed at the bottom of the second storage tank 13. A fourth delivery pipe 17 is installed at the output end of the second main pump 15, and a second electromagnetic three-way valve 18 is installed at the bottom end of the fourth delivery pipe 17. A second auxiliary pump 19 is installed on one side of the bottom of the second buffer tank 14. A fourth extraction pipe 20 is installed at the input end of the second auxiliary pump 19, and the bottom end of the fourth extraction pipe 20 is installed on the inner wall of the second buffer tank 14. A fifth delivery pipe 21 is installed at the output end of the second auxiliary pump 19, and the top end of the fifth delivery pipe 21 is installed on one side of the second storage tank 13. A sixth delivery pipe 22 is installed on the surface of the second electromagnetic three-way valve 18, and the top end of the sixth delivery pipe 22 is plugged into the inner wall of the second buffer tank 14.

[0030] A connecting pipe 23 is installed at the bottom end of the first electromagnetic three-way valve 8 , and a top end of the connecting pipe 23 is installed at the bottom end of the second electromagnetic three-way valve 18 .

[0031] During operation, a first storage tank 3 and a first buffer tank 4 are mounted on either side of the bottom of the car body 1. Liquid is drawn from the first storage tank 3 by a first main pump 5 at the bottom through a first extraction pipe 6. Liquid is then delivered by a first delivery pipe 7 to a first electromagnetic three-way valve 8, which then switches via a first electromagnetic valve 18 and connects to a connecting pipe 23. This electromagnetic valve also connects to the first buffer tank 4 via a third delivery pipe 12. Simultaneously, liquid is drawn from the first buffer tank 4 through a second extraction pipe 10 by a first auxiliary pump 9, which then returns to the first storage tank 3 via a second delivery pipe 11. Second storage tanks 13 and 14 are symmetrically positioned on the counterweight side. A second main pump 15 draws liquid from the second storage tank 13 through a third extraction pipe 16, which then flows to a second electromagnetic three-way valve 18 via a fourth delivery pipe 17. After switching via the second electromagnetic valve 18, liquid is then connected to a connecting pipe 23. The first electromagnetic valve 8 also connects to the second buffer tank 14 via a sixth delivery pipe 22. A second auxiliary pump 19 draws liquid from the second buffer tank 14 through a fourth extraction pipe 20, which then returns to the second storage tank 13 via a fifth delivery pipe 21. The two systems are connected in series via a connecting pipe 23 to the first solenoid three-way valve 8 and the second solenoid three-way valve 18, forming a bidirectional liquid transmission channel. When the car load changes, the weight sensor triggers the coordinated operation of the main and auxiliary pumps. If the car weight exceeds the counterweight, the second auxiliary pump 19 pumps liquid from the second buffer tank 14 to the second storage tank 13, creating negative pressure in the second buffer tank. Simultaneously, the first main pump 5 pumps liquid into the counterweight through the connecting pipe 23. Conversely, the first auxiliary pump 9 pumps liquid from the first buffer tank 4 to the first storage tank 3, creating negative pressure in the first buffer tank 3. Simultaneously, the second main pump 15 delivers liquid to the car, and the first auxiliary pump 9 pumps liquid from the first buffer tank 4 to replenish the first storage tank 3. The solenoid three-way valve controls the flow of liquid by switching the channel direction. The negative pressure in the buffer tanks assists in stable liquid transmission, ultimately achieving dynamic weight balance between the car and the counterweight. All pipelines are directly connected or plugged in to ensure sealing. The main pump is responsible for high-pressure delivery, and the auxiliary pump draws liquid from the buffer tank to generate negative pressure to assist the main pump in increasing delivery power. The entire system eliminates weight differences through the precise transfer of liquid media, thereby improving the stability of elevator operation.

[0032] When the third delivery pipe 12 and the sixth delivery pipe 22 are inserted into the buffer tank, the top ends are plugged into the inner top wall of the buffer tank and are designed with an oblique opening so that the liquid does not directly impact the inner wall of the buffer tank.

[0033] The volume of the storage tank and buffer tank will lengthen the length of the car side and the counterweight side, and then they are installed above the buffer support beam below the bottom of the car side and the counterweight side.

[0034] The speed of the main pump is synchronized with the shaft size stored in the elevator inverter. Because the power of the main pump to transport liquid is completely different on different floors of the car, when the car is at the bottom floor, the counterweight side is on the top floor. When transportation is required, the main pump needs to pump at the highest height, the pressure is the highest, and the power of the main pump is the highest. As the car floors rise, the power required for transportation gradually decreases. When the car is transported above the middle floor, the liquid can be transported by gravity, but the speed is too slow. The main pump still relies on low-power rotation to improve efficiency and complete the transportation. When the car is transporting at the highest floor, the power of the main pump reaches the minimum; when the car side is on the receiving side, the opposite is true and I will not repeat it.

[0035] The speed of the auxiliary pump is controlled by the liquid level of the buffer tank. The buffer tank is equipped with a liquid level sensor. The higher the liquid level, the faster the speed of the auxiliary pump should be. When the liquid level decreases, it proves that the negative pressure has increased and the speed can be reduced. When the liquid level drops to the lowest set value, the auxiliary pump stops running to avoid cavitation caused by inhaling air.

[0036] When the main pump operates normally but the liquid level in the buffer tank remains at the lowest level without changing, it is suspected that the connecting pipe is leaking. The main and auxiliary pumps should be stopped immediately and the elevator should be stopped and the alarm should be sounded.

[0037] The device eliminates the traditional compensation chain. The connecting pipe 23 is a hose, which is installed at the position of the original compensation chain. The weight of the connecting pipe and the liquid in the pipe just supplements the function of the compensation chain.

[0038] And a traveling cable is added on both sides of the counterweight to supply power and communicate with the circuits on both sides of the counterweight.

[0039] Example 2:

[0040] This embodiment is basically the same as the previous embodiment, with the difference that a first weight sensor 24 is installed at the bottom of the car body 1, a second weight sensor 25 is installed at the bottom of the counterweight 2, a first return pulley 26 is fixedly connected to the top of the car body 1, a second return pulley 27 is fixedly connected to the top of the counterweight 2, a fixed bottom plate 28 is provided above the car body 1, a gear box 29 is fixedly connected to the top of the fixed bottom plate 28, a traction machine 30 is fixedly connected to one side of the gear box 29, a rotating disk 31 is installed at the output end of the gear box 29, a wire rope 32 is rotatably connected to the surface of the rotating disk 31, and the surface of the wire rope 32 is rotatably connected to the surfaces of the first return pulley 26 and the second return pulley 27, the surface of the wire rope 32 is rotatably connected to the guide wheel 33, and the guide wheel 33 is located on the side close to the second return pulley 27, and a gate 34 is slidably connected to the surface of the car body 1.

[0041] During use, the first weight sensor 24 and the second weight sensor 25 are respectively installed at the bottom of the car body 1 and the counterweight 2, detecting the weight changes on both sides in real time and feeding back to the control system, triggering the liquid transmission adjustment mechanism; the top of the car body 1 is supported by the first return pulley 26 and the second return pulley 27 on the top of the counterweight 2, forming a transmission path for the traction force, wherein the first return pulley 26 converts the vertical movement of the car into traction of the wire rope, and the second return pulley 27 synchronizes the reverse movement of the counterweight to ensure the balance of torque on both sides; the fixed base plate 28 is installed at the top of the hoistway as a bearing platform, and the gearbox 29 on it and the traction machine 30 transmit power to the rotating disk 31 through mechanical linkage, driving the wire rope 32 to circulate around the first return pulley 26 and the second return pulley 27 to achieve the lifting and lowering of the car and the counterweight; the wire rope 32 maintains a stable running trajectory under the constraint of the guide wheel 33 to avoid deviation or slippage; the gate 34 is slidably connected to the surface of the car body 1 and opens and closes when the elevator is stopped to ensure passenger safety. The above structures work together. The weight sensor provides real-time load data, the return rope pulley and wire rope system efficiently transmits the traction force to the car and counterweight, the guide wheel ensures transmission accuracy, and the gate achieves safe isolation, ultimately forming a closed-loop controlled elevator balance and operation system.

[0042] Example 3:

[0043] A Class A office building in the city center has an average daily passenger flow of over 5,000 people, and its elevators are used very frequently. During peak hours, traditional elevators often experience the following problems due to the weight imbalance between the car and the counterweight:

[0044] Frequent starting and stopping will cause the traction sheave to wear out more severely, resulting in the "slip" phenomenon;

[0045] When overloaded, the brake system is overloaded, posing a safety hazard;

[0046] Passengers can clearly feel the vibration during operation, which reduces their comfort level;

[0047] In order to improve operational safety and riding experience, the office building adopted this elevator weight balance adjustment structure during the renovation.

[0048] The elevator car body 1 and counterweight 2 are symmetrically installed within the elevator shaft. A first storage tank 3 and a second storage tank 13 are located at the bottom of the car, each filled with a ferroferric oxide suspension to the specified level. (A 1,000 kg elevator load requires 500 kg of ferroferric oxide suspension, plus the remaining storage tank volume, approximately 130 L.) A traction machine 30, mounted atop a fixed baseplate 28, pre-tightens a steel rope 32 through a gearbox 29 and a rotating disc 31, ensuring consistent transmission ratios between the first and second return sheaves 26 and 27.

[0049] Morning peak upward phase:

[0050] When a large number of passengers enter the lobby on the first floor and the elevator is fully loaded, the first weight sensor 24 detects a sudden increase in the weight on the car side, and the control system immediately starts the balancing program:

[0051] Turn on the second auxiliary pump 19 on the counterweight side, generate negative pressure in the second buffer tank 14, and the liquid in the connecting pipe 23 flows into the buffer tank. At the same time, the first main pump 5 is turned on to extract liquid from the first storage tank 3 on the car side, and transport it to the second buffer tank 14 on the counterweight side through the first delivery pipe 7 and the connecting pipe 23. The second auxiliary pump 19 continuously extracts liquid from the second buffer tank 14 and transports it to the second storage tank 13 through the fifth delivery pipe 21.

[0052] The first electromagnetic three-way valve 8 switches to the "first delivery pipe 7 - connecting pipe 23" path, and the second electromagnetic valve 18 switches to the "connecting pipe 23 - sixth delivery pipe 22", allowing the liquid to flow stably from the first storage pipe 3 into the second buffer tank 14.

[0053] Because the elevator is fully loaded, all the liquid in the car must be transferred to the counterweight container. This entire process, from the time the first passenger enters the elevator, lasts approximately 30 seconds until the second weight sensor 25 indicates a torque difference of less than 5 kg, allowing the elevator to start smoothly. The torque difference threshold can be adjusted to a lower value, but this will slow down the system's settling time.

[0054] When three passengers exit the elevator on the third floor, the weight sensor detects a weight reduction of 180 kg. The first auxiliary pump 9 starts pumping liquid from the first buffer tank 4 into the first storage tank 3, creating a negative pressure in the first buffer tank 4. Simultaneously, the second main pump 15 pumps 90 kg of liquid from the second storage tank 13 through the connecting pipe 23 to replenish the liquid into the first buffer tank 4. The liquid then flows through the first auxiliary pump 9 to the first storage tank 3. The 180 kg reduction on the car side is equaled by the 90 kg replenishment on the counterweight side, restoring the weight balance on both sides.

[0055] When all passengers leave the elevator and the elevator is empty, the liquid in the second storage tank 13 on the counterweight side is completely transferred to the first storage tank on the car side, and the weight on both sides is restored to balance.

[0056] Lunchtime two-way operation phase:

[0057] As passengers randomly enter and exit different floors, the system responds in real time:

[0058] When the number of passengers in the car increases, liquid is transferred from the car to the counterweight. When the number of passengers in the car decreases, liquid is transferred from the counterweight to the car. The amount of liquid transferred is equal to half the weight of the passenger increase or decrease.

[0059] The guide wheel 33 corrects the swing amplitude of the wire rope 32 in real time to avoid the deviation of the rope groove caused by liquid transfer;

[0060] The gate 34 is linked to the floor leveling signal each time it stops to ensure that the weight calibration is completed before opening the door.

[0061] The system automatically executes at night:

[0062] By comparing the number of rotations of the first deflection pulley 26 and the second deflection pulley 27, the length error of the wire rope 32 is calibrated;

[0063] Use idle time to circulate and flush the pipeline to prevent the suspension from settling.

[0064] Working principle: When the elevator is in operation, the first weight sensor installed at the bottom of the car body and the second weight sensor at the bottom of the counterweight continuously monitor the load changes on both sides and feed back real-time data to the control system; when the number of passengers in the car increases and the weight increases, the system immediately starts the second auxiliary pump to pump the liquid in the buffer tank into the second storage tank through the fifth delivery pipe, forming a negative pressure in the second buffer tank. At the same time, the first main pump on the car side is started to extract high-density ferroferric oxide suspension from the bottom of the first storage tank through the first extraction pipe, and deliver it to the first electromagnetic three-way valve through the first delivery pipe. At this time, the three-way valve switches to the main delivery path, and the liquid flows through the connecting pipe to the second electromagnetic three-way valve on the counterweight side, and enters the second buffer tank through the sixth delivery pipe, and is then pumped into the second storage tank by the fifth delivery pipe to complete the weight transfer; on the contrary, when the car load is reduced, the second main pump on the counterweight side starts the corresponding process to deliver the liquid in reverse to the car side. During this process, the buffer tank's unique structural design creates a negative pressure effect, ensuring stable liquid transfer. All delivery pipes feature beveled cuts and guide fins to prevent air bubbles, while the rapid switching of the electromagnetic three-way valve ensures precise control of liquid flow. Simultaneously, during the elevator's re-leveling function, the first return pulley on the car roof and the second return pulley on the counterweight rotate synchronously, driven by wire ropes. A traction machine on the fixed baseplate drives a rotating disk through a gearbox, driving the wire rope around the return pulleys. A guide pulley ensures the wire rope maintains an optimal transmission path. The entire system forms a closed-loop control loop: a weight sensor monitors load changes, a control unit calculates the required liquid transfer volume, the main and auxiliary pumps work together to transfer the liquid, and the re-leveling system provides smooth traction and reaches a new equilibrium state. This repetitive cycle ensures smooth operation under all load conditions, effectively addressing issues such as sheave wear, brake failure, and jitter associated with weight imbalance in traditional elevators. Furthermore, the interlocking control of the gates further ensures passenger safety.

[0065] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An elevator weight balance adjustment structure, comprising a car body (1) and a counterweight (2), characterized in that: A first storage tank (3) is installed on one side of the bottom of the car body (1), a first buffer tank (4) is installed on the other side of the bottom of the car body (1), a first main pump (5) is installed on one side of the bottom of the first storage tank (3), a first extraction pipe (6) is installed at the input end of the first main pump (5), and the top end of the first extraction pipe (6) is installed at the bottom of the first storage tank (3), a first delivery pipe (7) is installed at the output end of the first main pump (5), a first electromagnetic three-way valve (8) is installed at the bottom end of the first delivery pipe (7), and the bottom of the first buffer tank (4) is provided with a first electromagnetic three-way valve (8). A first auxiliary pump (9) is installed on one side of the first auxiliary pump (9), a second extraction pipe (10) is installed on the input end of the first auxiliary pump (9), and the bottom end of the second extraction pipe (10) is installed on the inner wall of the first buffer tank (4), a second delivery pipe (11) is installed on the output end of the first auxiliary pump (9), and the top end of the second delivery pipe (11) is installed on one side of the first storage tank (3), a third delivery pipe (12) is installed on the surface of the first electromagnetic three-way valve (8), and the top end of the third delivery pipe (12) is plugged into the inner wall of the first buffer tank (4) and extends to the upper part of the first buffer tank (4); A second storage tank (13) is installed on one side of the bottom of the counterweight (2), a second buffer tank (14) is installed on the other side of the bottom of the counterweight (2), a second main pump (15) is installed on one side of the bottom of the second storage tank (13), a third extraction pipe (16) is installed at the input end of the second main pump (15), and the top end of the third extraction pipe (16) is installed at the bottom of the second storage tank (13), a fourth delivery pipe (17) is installed at the output end of the second main pump (15), a second electromagnetic three-way valve (18) is installed at the bottom end of the fourth delivery pipe (17), and the second buffer tank (14) is installed at the output end of the second main pump (15). A second auxiliary pump (19) is installed on one side of the bottom, a fourth extraction pipe (20) is installed on the input end of the second auxiliary pump (19), and the bottom end of the fourth extraction pipe (20) is installed on the inner wall of the second buffer tank (14), a fifth delivery pipe (21) is installed on the output end of the second auxiliary pump (19), and the top end of the fifth delivery pipe (21) is installed on one side of the second storage tank (13), a sixth delivery pipe (22) is installed on the surface of the second electromagnetic three-way valve (18), and the top end of the sixth delivery pipe (22) is plugged into the inner wall of the second buffer tank (14) and extends to the upper part of the second buffer tank (14); A connecting pipe (23) is installed at the bottom end of the first electromagnetic three-way valve (8), and the top end of the connecting pipe (23) is installed at the bottom end of the second electromagnetic three-way valve (18).

2. An elevator weight balance adjustment structure according to claim 1, characterized in that: A first weight sensor (24) is installed at the bottom of the car body (1), and a second weight sensor (25) is installed at the bottom of the counterweight (2).

3. The elevator weight balance adjustment structure according to claim 1, characterized in that: The top of the car body (1) is fixedly connected to a first return pulley (26), and the top of the counterweight (2) is fixedly connected to a second return pulley (27).

4. The elevator weight balance adjustment structure according to claim 1, characterized in that: A fixed bottom plate (28) is provided above the car body (1), a gear box (29) is fixedly connected to the top of the fixed bottom plate (28), a traction machine (30) is fixedly connected to one side of the gear box (29), and a rotating disk (31) is installed at the output end of the gear box (29).

5. The elevator weight balance adjustment structure according to claim 4, characterized in that: The surface of the rotating disk (31) is rotatably connected to a steel wire rope (32), and the surface of the steel wire rope (32) is rotatably connected to the surfaces of the first deflection pulley (26) and the second deflection pulley (27).

6. The elevator weight balance adjustment structure according to claim 5, characterized in that: The surface of the steel wire rope (32) is rotatably connected to a guide wheel (33), and the guide wheel (33) is located on a side close to the second deflecting pulley (27).

7. The elevator weight balance adjustment structure according to claim 1, characterized in that: A gate (34) is slidably connected to the surface of the car body (1).

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