High-stability elevator counterweight block jacking and limiting device

Abstract

The invention discloses a high-stability elevator counterweight block jacking and limiting device, and relates to the field of elevator counterweight blocks, the high-stability elevator counterweight block jacking and limiting device comprises a plurality of electromagnetic coils which are fixedly mounted on the inner walls of the two sides of a counterweight block box and correspond to guide rails. The corresponding electromagnetic coils can be correspondingly opened or closed along with increasing or decreasing of the number of passengers in the elevator car, magnetism is generated when current is introduced into the electromagnetic coils, the magnetic effect enables the electromagnetic coils and the guide rails to attract each other, damping is increased when the counterweight block box ascends and descends along the guide rails, and the counterweight block box is prevented from being damaged. According to the invention, based on the arrangement of the electromagnetic coils in the counterweight block box, all the electromagnetic coils can be quickly opened when the risk of weightlessness occurs, and the counterweight block box is enabled to horizontally abut against the guide rail to realize the purpose of limiting by utilizing the generated magnetic attraction effect, so that the safety is high.

Description

Technical Field

[0001] The present invention relates to the field of elevator counterweights, and particularly relates to a high-stability elevator counterweight tightening and limiting device. Background Art

[0002] In modern elevator systems, counterweights are key components for achieving the balance of elevator cars. Traditional counterweights usually consist of counterweight blocks with a fixed weight. Their main function is to balance the weight of the car, reducing the driving force required by the traction machine when driving the elevator, thereby improving the operating efficiency and stability. However, traditional counterweight systems have the following limitations:

[0003] The number of passengers or the weight of goods in the elevator car is dynamically changing, while the weight of traditional counterweights is fixed. Such fixed-weight counterweights cannot be adjusted in real time to adapt to the weight changes in the car, resulting in the traction machine needing to provide different driving forces under different load conditions, increasing energy consumption and operating costs; and in emergency situations, such as when the elevator car loses weight or falls, the traditional counterweight system cannot provide sufficient buffering or limiting functions, which may lead to serious safety accidents endangering the lives of passengers.

[0004] Therefore, it is necessary to propose a high-stability elevator counterweight tightening and limiting device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-stability elevator counterweight tightening and limiting device, which can quickly turn on all electromagnetic coils when there is a risk of weight loss, and utilize the magnetic attraction generated to horizontally tighten the counterweight box on the guide rail to achieve the purpose of limiting, with high safety.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A high-stability elevator counterweight tightening and limiting device, applicable to an elevator car in a hoistway. Four guide rails are also arranged in the hoistway at the four corners of the elevator car, including:

[0007] A counterweight box arranged between two guide rails on the same side of the elevator car;

[0008] A rated counterweight fixedly installed inside the lower end of the counterweight box;

[0009] Electromagnetic coils fixedly installed on the inner walls of both sides of the counterweight box and corresponding to the guide rails, with multiple electromagnetic coils provided;

[0010] When the electromagnetic coils are not energized, the total weight of the counterweight box is equal to the weight of the elevator car when it is unloaded;

[0011] When an electric current is passed through the electromagnetic coil, magnetism is generated. The magnetic effect causes an attractive force to be generated between the electromagnetic coil and the guide rail. When the counterweight box moves up and down along the guide rail, the damping increases, and the elevator car and the counterweight box maintain equal weights.

[0012] Preferably, a top plate is fixedly installed in the hoistway. A power mechanism is provided on the top plate for winding the cable. Pulleys are installed above both the counterweight box and the elevator car. Both ends of the cable are slidably arranged on the pulleys above the counterweight box and the elevator car respectively.

[0013] Preferably, the number and specifications of the electromagnetic coils are set according to the actual number of passengers or the weight in the elevator car; for example:

[0014] When setting the number of electromagnetic coils according to the number of passengers: when the actual number of passengers in the elevator car is 7, the number of electromagnetic coils is set to an integer multiple of 7;

[0015] When setting the specifications of the electromagnetic coils according to the passenger weight: when the actual number of passengers in the elevator car is 7, the specifications of the electromagnetic coils can be set as follows: when the damping formed when the electromagnetic coils are energized to generate magnetism is converted into weight, it is equivalent to the weight of a minor. The number of electromagnetic coils is set to.

[0016] Preferably, the method for converting the damping formed when the electromagnetic coils are energized to generate magnetism into weight is as follows:

[0017] The formula for the damping force is: F = c·v; where F is the damping force, unit: Newton; c is the damping coefficient in units of N / (m / s), and v is the velocity in units of m / s;

[0018] The weight formula is: W = m·g; where W is the weight, unit: Newton; m is the mass in kg, and g is the acceleration due to gravity, which is 9.81m / s 2 ;

[0019] Assume the weight of an adult is W Newtons. The mass m of the adult is calculated through the formula: m = W / g; knowing the weight of the adult, convert the weight of the adult into Newtons, and then use the formula for the damping force to calculate the damping force;

[0020] The mass of an adult is 70kg, and the weight W = 70·9.81 = 686.7N; the velocity v of the elevator car is 1m / s, then the damping coefficient c is: c = F / v = 686.7 / 1 = 686.7N / (m / s);

[0021] The weight caused by an adult entering the elevator is 686.7N, and the corresponding damping coefficient is 686.7N / (m / s).

[0022] Preferably, cylindrical sliding sleeves are integrally provided at both ends of the counterweight box. A guiding hole is provided in the cylindrical sliding sleeve, and a guiding rail is movably arranged through the guiding hole. The inner wall of the guiding hole and the outer surface of the guiding rail are both kept smooth, and lubrication treatment is carried out with lubricating oil.

[0023] Preferably, a counterweight box is further arranged inside the counterweight box. A sponge block is installed inside the lower end of the counterweight box, lubricating oil is added inside the counterweight box, the sponge block absorbs the lubricating oil, and conveying pipes are communicated and arranged on both sides of the lower end of the counterweight box. One end of the conveying pipe away from the counterweight box inclines downward. A conveying channel is further arranged inside the counterweight box. One end of the conveying channel is communicated with the conveying pipe, and the other end of the conveying channel is communicated with the inside of the guiding hole, and the inclination direction of the conveying channel is the same as that of the conveying pipe;

[0024] When the counterweight box ascends, the lubricating oil inside the counterweight box tends to move towards the lower end of the counterweight box. The lubricating oil flows into the conveying pipe through the absorption of the sponge block, and then flows into the guiding hole through the conveying channel;

[0025] Wiping rings are fixedly arranged at the upper and lower ends of the cylindrical sliding sleeve, and the wiping rings are located at the outlet of the guiding hole.

[0026] Preferably, a supporting plate is arranged inside the lower end of the elevator car. Four weighing sensors are arranged below the supporting plate. The lower ends of the weighing sensors are fixedly installed on the inner wall of the lower end of the elevator car. The four weighing sensors are distributed at the four corners of the supporting plate. The supporting plate is in a rectangular plate structure. There is a gap between the outer periphery of the supporting plate and the inner wall of the side surface of the elevator car. An elastic pad is arranged at the gap. A second hole is arranged on the elastic pad. There are multiple groups of the second holes, and the second holes penetrate through the upper and lower surfaces of the elastic pad at the same time. The inner ring of the elastic pad is fixed on the outer periphery of the supporting plate, and the outer ring of the elastic pad is fixed on the inner wall of the side surface of the elevator car. The elastic pad blocks the gap between the outer periphery of the supporting plate and the inner wall of the side surface of the elevator car.

[0027] Preferably, a first elastic isolation sleeve is sleeved outside the weighing sensor. The upper end of the first elastic isolation sleeve is fixed at the bottom of the supporting plate, and the lower end of the first elastic isolation sleeve is fixed on the inner wall of the lower end of the elevator car;

[0028] A first chamber is formed between the bottom of the supporting plate and the inner wall of the lower end of the elevator car, and the first chamber is communicated with the second hole;

[0029] A sundry box is fixedly arranged at the bottom of the elevator car. A second chamber is arranged inside the sundry box. A first hole is arranged on the lower end surface of the elevator car, and the first hole communicates between the second chamber and the first chamber.

[0030] Preferably, a suction pump is fixedly arranged on the inner wall of the lower end of the second chamber. A suction pipe is arranged at the upper end of the suction pump. The suction pipe is communicated with the interior of the second chamber. A discharge hole is arranged at the lower end of the suction pump. The discharge hole is communicated with the outside of the sundry box. A second elastic isolation sleeve is sleeved on the outer ring of the suction pump. The bottom of the second elastic isolation sleeve is fixedly arranged on the inner wall of the lower end of the second chamber. The upper end of the second elastic isolation sleeve is fixedly provided with a filter cotton sleeve. The upper end of the filter cotton sleeve is fixed on the inner wall of the upper end of the second chamber.

[0031] Preferably, a cleaning port is arranged on the front side of the sundry box. A sealing door is arranged in the cleaning port. A buckle groove is arranged on the surface of the sealing door.

[0032] The technical effects and advantages of the present invention are as follows:

[0033] 1. As the number of passengers in the elevator car increases or decreases, the corresponding electromagnetic coils can be opened or closed accordingly. When an electric current is passed through the electromagnetic coils, magnetism is generated. The magnetic effect causes an attractive force between the electromagnetic coils and the guide rails. When the counterweight box moves up and down along the guide rails, the damping increases, thus achieving the purpose of dynamic equal weight.

[0034] 2. The total weight of the supporting plate and the load is equal to one-fourth of the data measured by the four weighing sensors, avoiding the problem of inaccurate weighing caused by uneven load distribution in the elevator car and being able to solve the problem of inaccurate weighing caused by uneven load distribution in the elevator car. Moreover, the weighing sensors and the electromagnetic coils are connected through a control chip. When the weighing sensors detect a change in the weight of the elevator car, this information is fed back to the control chip, and the control chip then activates the corresponding number of electromagnetic coils to achieve dynamic balance.

[0035] 3. When the counterweight box rises, the lubricating oil inside the counterweight box tends to move towards the lower end of the counterweight box, and thus flows into the delivery pipe through the absorption of the sponge block, and then flows into the guide hole through the delivery channel, playing a role in lubricating the inner wall of the guide hole and the outer surface of the guide rail. As the counterweight box moves up and down, the lubricating oil acts on the entire inner wall of the guide hole and the entire outer surface of the guide rail, achieving the purpose of automatic lubricating oil addition and maintenance, and increasing the service life of the counterweight box and the guide rail.

[0036] 4. When all the electromagnetic coils are activated, the damping effect between the counterweight box and the guide rails is maximally increased, so that the counterweight box and the elevator car will not rise and fall too quickly, achieving the purpose of buffering or positioning and preventing the elevator car from falling.

[0037] 5. In the present invention, electromagnetic coils are provided in the counterweight box, which can quickly turn on all the electromagnetic coils when there is a risk of weightlessness. By using the magnetic attraction generated, the counterweight box is horizontally tightened against the guide rail to achieve the purpose of limiting position, with high safety.

[0038] 6. In order to solve the problem of inaccurate weighing caused by uneven load distribution in the elevator car, four groups of weighing sensors are provided under the supporting plate. The supporting plate is separated from the elevator car, so that when the four groups of weighing sensors weigh, they only weigh the total weight of the supporting plate and the load on the supporting plate, reducing the burden on the weighing sensors. And by setting four groups of weighing sensors, the four groups of weighing sensors are evenly distributed at the four corners of the supporting plate. The total weight of the supporting plate and the load is equal to one-fourth of the data measured by the four groups of weighing sensors, avoiding the problem of inaccurate weighing caused by uneven load distribution in the elevator car. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of the high-stability elevator counterweight tightening and limiting device of the present invention;

[0040] Figure 2 is a schematic external structure diagram of the counterweight box of the present invention;

[0041] Figure 3 is a schematic internal structure diagram of the counterweight box of the present invention;

[0042] Figure 4 is a schematic internal structure diagram of the counterweight box of the present invention;

[0043] Figure 5 is the Figure 4 enlarged structure diagram at position A of the present invention;

[0044] Figure 6 is a schematic structural diagram of the high-stability elevator counterweight tightening and limiting device of the present invention;

[0045] Figure 7 is a schematic structural diagram of the first hole of the present invention;

[0046] Figure 8 is a cross-sectional view of the high-stability elevator counterweight tightening and limiting device of the present invention;

[0047] Figure 9 is the Figure 6 enlarged view at position B of the present invention;

[0048] Figure 10 is the Figure 8 enlarged view at position C of the present invention.

[0049] In the figure: elevator car 1, top plate 2, guide rail 3, power mechanism 4, counterweight box 5, cylindrical sliding sleeve 6, wiping ring 7, gravitational acceleration sensor 8, electrical box 9, electromagnetic coil 10, counterweight box 11, delivery pipe 12, rated counterweight 13, sponge block 14, delivery channel 15, guide hole 16, supporting plate 17, sundries box 18, cleaning port 19, sealing door 20, buckle groove 21, weighing sensor 22, first elastic isolation sleeve 23, first hole 24, second chamber 25, first chamber 26, elastic pad 27, second hole 28, suction pump 29, suction pipe 30, second elastic isolation sleeve 31, filter cotton sleeve 32, discharge hole 33. Detailed implementation mode

[0050] As Figures 1 to 10 shown, a high-stability elevator counterweight tightening and limiting device.

[0051] Refer to Figure 1 shown in, the high-stability elevator counterweight tightening and limiting device includes an elevator car 1 arranged in the hoistway. Four guide rails 3 are also arranged in the hoistway. The four guide rails 3 are distributed at the four corners of the elevator car 1. A counterweight box 5 is arranged between two guide rails 3 on the same side of the elevator car 1. A top plate 2 is arranged above the elevator car 1. The top plate 2 is fixed in the hoistway. A power mechanism 4 is arranged on the top plate 2. The power mechanism 4 is used for winding the cable. Pulleys are installed above both the counterweight box 5 and the elevator car 1. The two ends of the cable are respectively slidably arranged on the pulleys above the counterweight box 5 and the elevator car 1.

[0052] During operation, when the power mechanism 4 is started and the power mechanism 4 drives the elevator car 1 to rise, the counterweight box 5 descends adaptively. When the power mechanism 4 drives the elevator car 1 to descend, the counterweight box 5 rises adaptively. The elevator car 1 and the counterweight box 5 are connected to both ends of the power mechanism 4, achieving the purpose of balance and reducing the torque borne by the power mechanism 4.

[0053] It should be noted that the power mechanism 4 can use a common traction machine; a traction machine usually includes: a motor, a traction wheel, a cable, and a brake;

[0054] Among them, the motor provides power. Common types include AC asynchronous motors and DC motors;

[0055] Traction wheel: The motor drives the traction wheel to rotate through a gear reduction device. The cable is wound around the traction wheel;

[0056] Cable: The two ends of the cable are respectively connected to the elevator car 1 and the counterweight box 5. The elevator car 1 and the counterweight box 5 are driven to move up and down by relying on the friction between the cable and the traction wheel;

[0057] Brake: Quickly stop the elevator car 1 in case of emergency to ensure the safety of passengers.

[0058] Reference Figures 1 to 5 As shown in the figure, since the number of passengers in the elevator car 1 is unstable, the weight of the elevator car 1 is constantly changing, and it is not easy to adjust the weight of the counterweight box 5 at any time. Therefore, in the present invention, a rated counterweight 13 and electromagnetic coils 10 are provided inside the counterweight box 5. The rated counterweight 13 is fixedly installed inside the lower end of the counterweight box 5, and a plurality of electromagnetic coils 10 are provided. The plurality of electromagnetic coils 10 are respectively fixedly installed on the inner walls on both sides of the counterweight box 5 and correspond to the guide rails 3.

[0059] In the initial state, no current is passed through the electromagnetic coils 10, and the overall weight of the counterweight box 5 is equal to the weight of the elevator car 1 when it is unloaded, achieving the purpose of equal weights, making the elevator car 1 and the counterweight box 5 more stable during lifting and lowering;

[0060] As the number of passengers in the elevator car 1 increases or decreases, the corresponding electromagnetic coils 10 can be turned on or off accordingly. When a current is passed through the electromagnetic coils 10, magnetism is generated. The magnetic effect causes an attractive force between the electromagnetic coils 10 and the guide rails 3. When the counterweight box 5 moves up and down along the guide rails 3, the damping increases, thus achieving the purpose of dynamic equal weights.

[0061] It should be noted that the number and specifications of the electromagnetic coils 10 can be set according to the actual number of passengers or the weight of the elevator car 1; for example:

[0062] When setting the number of electromagnetic coils 10 according to the number of passengers: when the actual number of passengers in the elevator car 1 is 7, the number of electromagnetic coils 10 can be set to an integer multiple of 7, such as 7 or 14. In the present invention, 14 are provided; since there is an obvious difference in weight between adults and minors, when an adult is carried in the elevator car 1, two electromagnetic coils 10 can be turned on accordingly. The magnetism generated by the energization of the two electromagnetic coils 10 causes a damping effect on the lifting and lowering of the counterweight box 5, which is exactly equal to the weight of an adult when converted into weight; when a minor is carried in the elevator car 1, one electromagnetic coil 10 can be turned on accordingly. The magnetism generated by the energization of one electromagnetic coil 10 causes a damping effect on the lifting and lowering of the counterweight box 5, which is exactly equal to the weight of a minor when converted into weight;

[0063] When setting the specifications of the electromagnetic coil 10 according to the passenger weight: when the actual number of passengers in the elevator car 1 is 7, the specifications of the electromagnetic coil 10 can be set as follows: when the electromagnetic coil 10 is energized to generate magnetism, the damping formed is equivalent to the weight of a minor when converted into weight. The number of electromagnetic coils 10 is set to 14. Therefore, when an adult is carried in the elevator car 1, two electromagnetic coils 10 can be correspondingly turned on. The magnetism generated by the energization of the two electromagnetic coils 10 causes a damping equivalent to the weight of an adult when converted into weight during the lifting and lowering of the counterweight box 5; when a minor is carried in the elevator car 1, one electromagnetic coil 10 can be correspondingly turned on. The magnetism generated by the energization of one electromagnetic coil 10 causes a damping equivalent to the weight of a minor when converted into weight during the lifting and lowering of the counterweight box 5.

[0064] In actual use, the electromagnetic coil 10 can also be selected with larger specifications, and the magnitude of the current passing through the electromagnetic coil 10 can be adjusted, so that the electromagnetic coil 10 generates different strengths of magnetism, forming different magnitudes of damping between the counterweight box 5 and the guide rail 3, so as to adapt to the adjustment during the process of more passengers with different weights entering and leaving the elevator car 1.

[0065] The method of converting damping into weight is as follows:

[0066] The unit of damping is usually N / (m / s), and the unit of weight is usually kg. Assume the weight of an adult is: 70 kg; the formula for the damping force is: F = c·v; where F is the damping force (in newtons: N), c is the damping coefficient (in N / (m / s)), and v is the velocity (in m / s).

[0067] Weight is the force acting on an object due to gravity, and its formula is: W = m·g; where W is the weight (in newtons: N), m is the mass (in kilograms: kg), and g is the acceleration due to gravity (about 9.81 m / s 2 )

[0068] To convert damping into weight, a specific situation can be considered. For example, when an adult enters the elevator car 1, the damping system of the elevator car 1 needs to provide a force equal to the weight of the adult to balance; assume the weight of the adult is W newtons, then the mass m of the adult can be calculated by the following formula: m = W / g; if the weight of the adult (in kilograms) is known, it can be converted into newtons and then the above formula can be used to calculate the damping force; if the mass of the adult is 70 kg, then its weight W is: W = 70·9.81 = 686.7 N;

[0069] If the damping system of the elevator car 1 needs to provide a force equal to the weight of an adult to achieve balance, then the damping force F is 686.7 N; if the speed v of the elevator car 1 is 1 m / s, then the damping coefficient c is: c = F / v = 686.7 / 1 = 686.7 N / (m / s); therefore, if the mass of an adult is 70 kg, then the weight caused by the adult entering the elevator is 686.7 N, and the corresponding damping coefficient is 686.7 N / (m / s).

[0070] Reference Figures 6 to 10 As shown in the reference, since the weight of the passengers is random, although the purpose of "dynamic equal weight" can be achieved by using different numbers or specifications of electromagnetic coils 10, it is impossible to combine the real-time weight of the elevator car 1 with the number of activated electromagnetic coils 10 for operation. Therefore, in the present invention, a supporting plate 17 is further provided inside the lower end of the elevator car 1, and four groups of weighing sensors 22 are provided below the supporting plate 17. The supporting plate 17 is detachably arranged with the elevator car 1, so that when the four groups of weighing sensors 22 weigh, they only weigh the total weight of the supporting plate 17 and the load on the supporting plate 17, reducing the burden on the weighing sensors 22. And by setting four groups of weighing sensors 22, the four groups of weighing sensors 22 are evenly distributed at the four corners of the supporting plate 17. The total weight of the supporting plate 17 and the load is equal to one-fourth of the data measured by the four groups of weighing sensors 22, avoiding the problem of inaccurate weighing caused by uneven load distribution in the elevator car 1, and being able to solve the problem of inaccurate weighing caused by uneven load distribution in the elevator car 1; and the weighing sensors 22 are connected to the electromagnetic coils 10 through a control chip. When the weighing sensors 22 detect a change in the weight of the elevator car 1, this information is fed back to the control chip, and the control chip then activates the corresponding number of electromagnetic coils 10 to achieve dynamic balance; the control chip is a common existing mechanism for information transmission and control execution, which will not be elaborated here. The control chip can be connected to the weighing sensors 22 through wires, and the control chip is then connected to the electromagnetic coils 10 through a wireless transmitter.

[0071] In the present invention, when a person stands on one side close to the supporting plate 17 on the supporting plate 17, one side of the supporting plate 17 is stressed more and the other side is stressed less. Sometimes people will also walk on the supporting plate 17. If only one group of weighing sensors 22 is provided at the middle position of the lower surface of the supporting plate 17, the data measured by the weighing sensors 22 will fluctuate at this time, causing inaccurate problems; while four groups of weighing sensors 22 are provided in this device, which well solves the above problems.

[0072] Among them, the lower end of the load cell 22 is fixedly installed on the inner wall of the lower end of the elevator car 1. The supporting plate 17 is in the shape of a rectangular plate. There is a gap between the outer periphery of the supporting plate 17 and the inner wall of the side surface of the elevator car 1, so that the supporting plate 17 and the elevator car 1 are designed to be separated, ensuring that the total weight of the data measured by the four load cells 22 is equal to the weight of the supporting plate 17 and the load, and improving the accuracy of the weighing data.

[0073] Considering that the gap between the supporting plate 17 and the elevator car 1 may be blocked by sundries, an elastic pad 27 is provided at the gap. The inner ring of the elastic pad 27 is fixed to the outer periphery of the supporting plate 17, and the outer ring of the elastic pad 27 is fixed to the inner wall of the side surface of the elevator car 1. The elastic pad 27 blocks the gap between the outer periphery of the supporting plate 17 and the inner wall of the side surface of the elevator car 1, and the elastic pad 27 prevents sundries from falling between the inner wall of the lower end of the elevator car 1 and the bottom surface of the supporting plate 17.

[0074] Furthermore, a second hole 28 is provided on the elastic pad 27. There are multiple groups of the second holes 28, and the second holes 28 penetrate through the upper and lower surfaces of the elastic pad 27 at the same time. A first chamber 26 is formed between the bottom of the supporting plate 17 and the inner wall of the lower end of the elevator car 1. The first chamber 26 is communicated with the second hole 28. If liquid spills on the surface of the supporting plate 17, the liquid will slide down along the second hole 28 into the first chamber 26. And a debris box 18 is fixedly arranged at the bottom of the elevator car 1. A second chamber 25 is arranged inside the debris box 18. A first hole 24 is arranged on the lower end surface of the elevator car 1. The first hole 24 is communicated between the second chamber 25 and the first chamber 26. The liquid that slides into the first chamber 26 will continue to drip into the second chamber 25 through the first hole 24 for storage, avoiding the influence of the liquid on the elevator car 1 and its components, such as corrosion.

[0075] Considering that there is also a load cell 22 arranged in the second chamber 25, and the liquid entering the second chamber 25 may affect the load cell 22. Therefore, a first elastic isolation sleeve 23 is sleeved on the outer ring of the load cell 22. The upper end of the first elastic isolation sleeve 23 is fixed to the bottom of the supporting plate 17, and the lower end of the first elastic isolation sleeve 23 is fixed to the inner wall of the lower end of the elevator car 1. The first elastic isolation sleeve 23 serves the purpose of isolating the liquid and the load cell 22, and the first elastic isolation sleeve 23 can be elastically deformed and has a certain telescopic performance, without affecting the weighing use of the load cell 22.

[0076] Considering that the liquid on the surface of the supporting plate 17 may not flow naturally into the first chamber 26 or the second chamber 25, a suction pump 29 is fixedly arranged on the inner wall at the lower end of the second chamber 25. A suction pipe 30 is arranged at the upper end of the suction pump 29, and the suction pipe 30 communicates with the inside of the second chamber 25. A discharge hole 33 is arranged at the lower end of the suction pump 29, and the discharge hole 33 communicates with the outside of the debris box 18. When the suction pump 29 is started, suction can be generated at the second hole 28, so that the liquid on the surface of the supporting plate 17 can be attracted and finally stored in the second chamber 25. At the same time, when suction is generated at the second hole 28, dust on the surface of the supporting plate 17 and inside the elevator car 1 can be sucked in, avoiding failures caused by dust and the like to the elevator car 1 and its components.

[0077] A second elastic isolation sleeve 31 is sleeved on the outer ring of the suction pump 29. The bottom of the second elastic isolation sleeve 31 is fixedly arranged on the inner wall at the lower end of the second chamber 25. The upper end of the second elastic isolation sleeve 31 is fixedly provided with a filter cotton sleeve 32. The upper end of the filter cotton sleeve 32 is fixed on the inner wall at the upper end of the second chamber 25. The second elastic isolation sleeve 31 can isolate the liquid from the suction pump 29, while the filter cotton sleeve 32 allows gas to pass through, without affecting the operation of the suction pump 29.

[0078] In order to facilitate the cleaning of the liquid and garbage collected in the debris box 18, a cleaning port 19 is arranged on the front side of the debris box 18. A sealing door 20 is arranged in the cleaning port 19. A buckle groove 21 is arranged on the surface of the sealing door 20. The sealing door 20 can be opened by operating the buckle groove 21. The sealing door 20 can be of a hinged design or a snap - fit connection, etc. The commonly used and suitable installation methods in the prior art can be used, which will not be elaborated here.

[0079] Reference Figures 2 to 5 As shown in

[0080] Moreover, in the present invention, a counterweight box 11 is also provided inside the heavy block box 5. A sponge block 14 is installed inside the lower end of the counterweight box 11, and lubricating oil is also added inside the counterweight box 11. The sponge block 14 can absorb the lubricating oil. Both sides of the lower end of the counterweight box 11 are communicated with a delivery pipe 12. One end of the delivery pipe 12 away from the counterweight box 11 is inclined downward. A delivery channel 15 is also provided inside the heavy block box 5. One end of the delivery channel 15 is communicated with the delivery pipe 12, and the other end of the delivery channel 15 is communicated with the inside of the guide hole 16. Moreover, the inclination direction of the delivery channel 15 is the same as that of the delivery pipe 12; when the heavy block box 5 rises, the lubricating oil inside the counterweight box 11 tends to move towards the lower end of the counterweight box 11, and thus flows into the delivery pipe 12 through the absorption of the sponge block 14, and then flows into the guide hole 16 through the delivery channel 15, playing a role in lubricating the inner wall of the guide hole 16 and the outer surface of the guide rail 3. As the heavy block box 5 moves up and down, the lubricating oil acts on the entire inner wall of the guide hole 16 and the entire outer surface of the guide rail 3, achieving the purpose of automatically adding lubricating oil for maintenance and increasing the service life of the heavy block box 5 and the guide rail 3.

[0081] Wiping rings 7 are also fixedly provided at the upper and lower ends of the cylindrical sliding sleeve 6. The wiping rings 7 are located at the outlet of the guide hole 16. When the heavy block box 5 moves up and down along the height direction of the guide rail 3, the wiping rings 7 can scrape the outer surface of the guide rail 3, so that there is only a thin oil film on the outer surface of the guide rail 3 for lubrication, reducing the problem of dust adhering to the outer surface of the guide rail 3. Moreover, when the wiping rings 7 move up and down with the heavy block box 5, they can also wipe off the dust adhering to the outer surface of the guide rail 3, avoiding the problem of wear caused by dust entering the inside of the guide hole 16, and further increasing the service life of the heavy block box 5 and the guide rail 3; in actual use, those skilled in the art can select the material of the wiping rings 7 according to actual needs, such as: sponge, rubber, flame-retardant cotton cloth, etc.

[0082] It should be noted that since the sponge block 14 can only absorb the lubricating oil unidirectionally, only a small amount of the lubricating oil absorbed into the sponge block 14 will be squeezed into the delivery pipe 12 when the heavy block box 5 is lifted or lowered under force, achieving the purpose of controlling the amount of lubricating oil added, enabling the lubricating oil stored in the counterweight box 11 to be used for a long time, and the counterweight box 11 can accommodate a relatively large amount of lubricating oil at one time, which can not only reduce the maintenance frequency, but also reduce the counterweight setting of the heavy block box 5 itself, saving costs.

[0083] Reference Figure 3As shown, the electromagnetic coil 10 provided in the present invention also has the function of preventing the elevator car 1 from falling. Specifically, an electrical box 9 is further provided inside the counterweight box 5. A gravitational acceleration sensor 8 is provided in the electrical box 9. The gravitational acceleration sensor 8 can monitor whether there is a problem of weightlessness during the lifting and lowering of the counterweight box 5. If the counterweight box 5 shows a phenomenon of weightlessness, it proves that the elevator car 1 also has problems of weightlessness falling or rising sharply due to an accident. The gravitational acceleration sensor 8 is also connected to the electromagnetic coil 10 by a control chip. The control chip can receive the weightlessness information fed back by the gravitational acceleration sensor 8 and control the electromagnetic coil 10 to start. When all the electromagnetic coils 10 are started, the damping effect between the counterweight box 5 and the guide rail 3 is maximally increased, so that the counterweight box 5 and the elevator car 1 will not lift or lower too quickly, achieving the purpose of buffering or positioning, and preventing the elevator car 1 from falling.

[0084] It should also be noted that an oil pump can be provided in the counterweight box 11 in the present invention, and the oil pump can be started regularly to add lubricating oil to the guide hole 16. This is a problem that those skilled in the art can adjust according to actual needs.

[0085] Furthermore, a guiding slide rail matching method can also be considered for the relative movement between the guide rail 3 and the counterweight box 5. This is also a problem that those skilled in the art can adjust according to actual needs and will not be elaborated here.

[0086] A DC / AC power supply or the like for the use of the electromagnetic coil 10 can also be provided in the electrical box 9 of the present invention, or it can be directly connected to an external power supply. This is a problem that those skilled in the art can choose according to actual needs.

[0087] In summary, based on the provision of the electromagnetic coil 10 in the counterweight box 5 in the present invention, all the electromagnetic coils 10 can be quickly turned on when there is a risk of weightlessness, and the magnetic attraction generated is used to make the counterweight box 5 tightly abut against the guide rail 3 horizontally to achieve the purpose of limiting position, with high safety.

Claims

1. A high-stability elevator counterweight top-tightening limit device, applicable to an elevator car (1) in a hoistway, wherein four guide rails (3) are further arranged in the hoistway and distributed at four corners of the elevator car (1), and is characterized in that, Comprising: A counterweight box (5) disposed between two guide rails (3) on the same side of an elevator car (1); A rated counterweight (13) fixedly installed inside the lower end of the counterweight box (5); Electromagnetic coils (10) fixedly installed on both inner walls of the counterweight box (5) and corresponding to the guide rails (3), and a plurality of electromagnetic coils (10) are provided; When no current is passed through the electromagnetic coils (10), the overall weight of the counterweight box (5) is equal to the weight of the elevator car (1) when it is unloaded; When an electric current is passed through the electromagnetic coils (10), magnetism is generated, and the magnetic action causes an attracting action between the electromagnetic coils (10) and the guide rails (3). When the counterweight box (5) moves up and down along the guide rails (3), the damping increases, and an equal weight is maintained between the elevator car (1) and the counterweight box (5).

2. The high-stability elevator counterweight top-tightening limit device according to claim 1, characterized in that: A top plate (2) is fixedly installed in the hoistway, and a power mechanism (4) is provided on the top plate (2). The power mechanism (4) is used for winding a cable. Pulleys are installed above both the counterweight box (5) and the elevator car (1), and both ends of the cable are slidably disposed on the pulleys above the counterweight box (5) and the elevator car (1); An electrical box (9) is further provided inside the counterweight box (5), and a gravitational acceleration sensor (8) is provided in the electrical box (9).

3. A high-stability elevator counterweight top-tightening and limit device according to claim 1, characterized in that: Set the number and specifications of the electromagnetic coils (10) according to the actual number of passengers or the weight of the elevator car (1); For example: When setting the number of the electromagnetic coils (10) according to the number of passengers: When the actual number of passengers in the elevator car (1) is 7, the number of the electromagnetic coils (10) is set to an integer multiple of 7; When setting the specifications of the electromagnetic coils (10) according to the passenger weight: When the actual number of passengers in the elevator car (1) is 7, the specifications of the electromagnetic coils (10) can be set as follows: When the damping formed when the electromagnetic coils (10) are energized to generate magnetism is converted into weight, it is equivalent to the weight of a minor, and the number of the electromagnetic coils (10) is set to 14.

4. A high-stability elevator counterweight top-tightening limit device according to claim 3, characterized in that: The method for converting the damping formed when the electromagnetic coils (10) are energized to generate magnetism into weight is: The formula for the damping force is: F = c·v; where F is the damping force, unit: Newton; c is the damping coefficient in units of N / (m / s), and v is the speed in units of m / s; The weight formula is: W = m·g; where W is the weight, unit: Newton; m is the mass, in kg, and g is the acceleration due to gravity, which is 9.81 m / s 2 ; Assume the weight of an adult is W Newtons, and the mass m of the adult is calculated by the formula: m = W / g; knowing the weight of the adult, convert the weight of the adult into Newtons, and then use the formula for the damping force to calculate the damping force; The mass of an adult is 70 kg, and the weight W = 70·9.81 = 686.7 N; the speed v of the elevator car (1) is 1 m / s, then the damping coefficient c is: c = F / v = 686.7 / 1 = 686.7 N / (m / s); The weight caused by an adult entering the elevator is 686.7 N, and the corresponding damping coefficient is 686.7 N / (m / s).

5. A high-stability elevator counterweight block tightening and limiting device according to claim 1, characterized in that: Both ends of the counterweight box (5) are integrally provided with cylindrical sliding sleeves (6). A guiding hole (16) is provided in the cylindrical sliding sleeve (6). The guiding rail (3) is movably arranged through the guiding hole (16). The inner wall of the guiding hole (16) and the outer surface of the guiding rail (3) are both kept smooth, and lubricating oil is used for lubrication treatment.

6. The high-stability elevator counterweight top-tightening limit device according to claim 5, characterized in that: A counterweight box (11) is further arranged inside the counterweight box (5). A sponge block (14) is installed inside the lower end of the counterweight box (11). Lubricating oil is added inside the counterweight box (11). The sponge block (14) absorbs the lubricating oil. Both sides of the lower end of the counterweight box (11) are communicated with a conveying pipe (12). One end of the conveying pipe (12) away from the counterweight box (11) inclines downward. A conveying channel (15) is further arranged inside the counterweight box (5). One end of the conveying channel (15) is communicated with the conveying pipe (12), and the other end of the conveying channel (15) is communicated with the inside of the guiding hole (16). Moreover, the inclination direction of the conveying channel (15) is the same as that of the conveying pipe (12); When the counterweight box (5) ascends, the lubricating oil inside the counterweight box (11) tends to move towards the lower end of the counterweight box (11). The lubricating oil flows into the conveying pipe (12) through the absorption of the sponge block (14), and then flows into the guiding hole (16) through the conveying channel (15); Wiping rings (7) are fixedly arranged at the upper and lower ends of the cylindrical sliding sleeve (6). The wiping rings (7) are located at the outlet of the guiding hole (16).

7. A high-stability elevator counterweight top-tightening limit device according to claim 2, characterized in that: A supporting plate (17) is arranged inside the lower end of the elevator car (1). Four groups of weighing sensors (22) are arranged below the supporting plate (17). The lower ends of the weighing sensors (22) are fixedly installed on the inner wall of the lower end of the elevator car (1). The four groups of weighing sensors (22) are distributed at the four corners of the supporting plate (17). The supporting plate (17) is in a rectangular plate structure. A gap is left between the outer periphery of the supporting plate (17) and the inner wall of the side surface of the elevator car (1). An elastic pad (27) is arranged in the gap. A second hole (28) is arranged on the elastic pad (27). There are multiple groups of the second holes (28). The second holes (28) penetrate through the upper and lower surfaces of the elastic pad (27) at the same time. The inner ring of the elastic pad (27) is fixed on the outer periphery of the supporting plate (17), and the outer ring of the elastic pad (27) is fixed on the inner wall of the side surface of the elevator car (1). The elastic pad (27) blocks the gap left between the outer periphery of the supporting plate (17) and the inner wall of the side surface of the elevator car (1).

8. A high-stability elevator counterweight top-tightening limit device according to claim 7, characterized in that: A first elastic isolation sleeve (23) is sleeved outside the weighing sensor (22). The upper end of the first elastic isolation sleeve (23) is fixed at the bottom of the supporting plate (17), and the lower end of the first elastic isolation sleeve (23) is fixed on the inner wall of the lower end of the elevator car (1); A first chamber (26) is formed between the bottom of the supporting plate (17) and the inner wall of the lower end of the elevator car (1). The first chamber (26) is communicated with the second hole (28); A sundries box (18) is fixedly arranged at the bottom of the elevator car (1). A second chamber (25) is arranged inside the sundries box (18). A first hole (24) is arranged on the lower end surface of the elevator car (1). The first hole (24) communicates between the second chamber (25) and a first chamber (26). A cleaning port (19) is arranged on the front side of the sundries box (18). A sealing door (20) is arranged in the cleaning port (19). A buckling groove (21) is arranged on the surface of the sealing door (20).

9. The high-stability elevator counterweight block top-tightening limit device according to claim 8, wherein: A suction pump (29) is fixedly arranged on the lower end inner wall of the second chamber (25). A suction pipe (30) is arranged at the upper end of the suction pump (29). The suction pipe (30) communicates with the inside of the second chamber (25). A discharge hole (33) is arranged at the lower end of the suction pump (29). The discharge hole (33) communicates with the outside of the sundries box (18). A second elastic isolation sleeve (31) is sleeved on the outer ring of the suction pump (29). The bottom of the second elastic isolation sleeve (31) is fixedly arranged on the lower end inner wall of the second chamber (25). The upper end of the second elastic isolation sleeve (31) is fixedly provided with a filter cotton sleeve (32). The upper end of the filter cotton sleeve (32) is fixed on the upper end inner wall of the second chamber (25).

10. A high-stability elevator counterweight block tightening and limiting device according to claim 7, characterized in that: The weighing sensor (22), the gravitational acceleration sensor (8) and the electromagnetic coil (10) are connected through a control chip. When the weighing sensor (22) monitors that the weight of the elevator car (1) changes, this information is fed back to the control chip, and the control chip then turns on the corresponding number of electromagnetic coils (10). The control chip receives the weightlessness information fed back by the gravitational acceleration sensor (8) and controls the electromagnetic coil (10) to start.

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