Heavy-load elevator and control method of heavy-load elevator

Abstract

The present application relates to the technical field of elevators, and discloses a heavy-duty elevator and a control method for the heavy-duty elevator. The heavy-duty elevator includes a traction device, a car device, two counterweight devices, a position detection device, and a control system; the traction device includes a traction machine, two traction wheels, and traction ropes respectively wound around each traction wheel; the car-side rope bodies of the two traction ropes are both connected to the car device, and the counterweight-side rope bodies are each connected to a counterweight device; a plurality of position detection devices are arranged on the top of the car device, and the control system is configured to: obtain the instant height H itk and the original height H it0 to obtain the height difference ΔH i , and determine whether the car device is unevenly loaded according to the height difference ΔH i , and send an uneven load prompt message when it is determined that the car device is unevenly loaded. The solution provided by the present application can avoid problems such as unstable elevator operation, short service life, and risks caused by uneven loading of the heavy-duty elevator due to carrying large loads.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and more specifically, to a heavy-load elevator and a control method for the heavy-load elevator. Background Art

[0002] With the advancement of industrial building construction, the demand for elevator load capacity is increasing. For elevators that can withstand large loads, due to the large load and relatively concentrated load, the elevator is prone to overloading, which will lead to unstable operation of the elevator. Overloading will also lead to high elevator failure rate, short life and other problems, and there are safety hazards. Summary of the invention

[0003] The embodiments of the present application provide a heavy-load elevator and a control method for the heavy-load elevator, which are used to meet the large load requirements of the elevator and can effectively avoid problems such as unstable operation and short life caused by unbalanced loading of the elevator.

[0004] An embodiment of the present application provides a heavy-load elevator, including a traction device, a car device, two counterweight devices, a position detection device, and a control system;

[0005] The traction device is arranged to be installed on the load-bearing frame, and the traction device comprises a traction machine, two traction wheels and a traction rope respectively wound around each of the traction wheels, the two traction wheels are respectively installed at both ends of the traction machine to be synchronously driven by the traction machine; the car side rope bodies of the two traction ropes are arranged to be connected to the car device, and the counterweight side rope bodies are respectively connected to one of the counterweight devices, and the two counterweight devices are arranged on the same side of the car device along the depth direction of the car;

[0006] Wherein, a plurality of position detection devices are arranged on the top of the car device, and each position detection device is arranged to obtain the instantaneous height H of the position at which it is located. itk , the control system is set to: obtain the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device is overloaded, and issue an overload prompt message when it is determined that the car device is overloaded; wherein the original height H it0 It is the instantaneous height obtained by each of the position detection devices when the door of the car device is initially opened.

[0007] In one embodiment, the car device comprises a plurality of car frames arranged in sequence along the depth direction of the car, and the position detection device is respectively provided on both sides of each of the car frames;

[0008] The control system is configured as follows: the height difference ΔH of the position detection devices located on both sides of the same car framei When the difference between exceeds a first preset value, it is determined that the car device is overloaded.

[0009] In one embodiment, the control system is further configured to: calculate the height difference ΔH of the plurality of position detection devices i The height difference △H of each position detection device is calculated. i The deviation from the average value is greater than a second preset value, and when the deviation exceeds a second preset value, it is determined that the car device is overloaded.

[0010] In one embodiment, the control system is configured to: control the car device to run at a rated speed when it is determined that the car device is not overloaded; and control the car device to run at an overload speed lower than the rated speed when it is determined that the car device is overloaded.

[0011] In one embodiment, the control system is further configured to: when the car device runs to the nearest floor and the car device is in an overloaded state, control the car device to re-level at the nearest floor; based on whether the car device is overloaded after re-leveling, control the car device to run at an overloaded speed or at a rated speed.

[0012] In one embodiment, the traction machine is located at a middle position of the car device in the car depth direction, and the two counterweight devices are respectively arranged on both sides of the middle position.

[0013] In one embodiment, it further comprises a plurality of car top return rope pulleys and a plurality of counterweight return rope pulleys mounted on the load-bearing frame;

[0014] The car device comprises a car and a plurality of car top wheels mounted on the top of the car, and each of the counterweight devices comprises a counterweight and a plurality of counterweight wheels mounted on the top of the counterweight;

[0015] The two traction ropes are configured as follows: the counterweight side rope body is respectively passed around the corresponding counterweight wheel and the counterweight return rope pulley, and the end is connected to the first predetermined structure; the car side rope body is configured to be respectively passed around the corresponding car top wheel and the car top return rope pulley, and the end is connected to the second predetermined structure.

[0016] In one embodiment, the first predetermined structure and the second predetermined structure are both arranged on the load-bearing frame;

[0017] Alternatively, the first predetermined structure is provided on the counterweight device, and the second predetermined structure is provided on the car device.

[0018] In one embodiment, the car top wheels corresponding to each traction rope are arranged in multiple rows, each row of the car top wheels is arranged along the width direction of the car, and the axial direction of the car top wheels is arranged along the depth direction of the car;

[0019] The plurality of car top return rope pulleys are arranged in a plurality of rows, each row of the car top return rope pulleys corresponds to a row of the car top wheels, and the axial direction of the car top return rope pulley is parallel to the axial direction of the car top wheels;

[0020] The load-bearing frame is also provided with a car side steering wheel which is axially perpendicular to the car top wheel. The car side steering wheel is provided between each two adjacent rows of the car top return rope wheels so that the traction rope is turned from one row of the car top wheels through the car side steering wheel to be wound around another row of the car top wheels.

[0021] In one embodiment, each row of the car top wheels is arranged on a car frame of the car device.

[0022] In one embodiment, the plurality of car top wheels are evenly arranged in the depth direction of the car, or the plurality of car top wheels are unevenly arranged in the depth direction of the car.

[0023] In one embodiment, each of the counterweight devices is provided with at least one row of counterweight wheels, each row of the counterweight wheels is arranged along the depth direction of the car, and the plurality of counterweight return rope wheels corresponding to each of the counterweight devices are arranged in at least one row, and each row of the counterweight return rope wheels corresponds to one row of the counterweight wheels respectively;

[0024] Wherein, when each counterweight device is provided with multiple rows of counterweight wheels, the load-bearing frame is also provided with a counterweight side steering wheel which is perpendicular to the axial direction of the counterweight wheels, and the counterweight side steering wheel is provided between each two adjacent rows of the counterweight return rope wheels, so as to allow the traction rope to be diverted from one row of the counterweight wheels through the counterweight side steering wheel to be wound around another row of the counterweight wheels.

[0025] In one embodiment, each of the counterweight devices includes a plurality of counterweights arranged along the width direction of the car and relatively fixed, and a row of counterweight wheels is provided corresponding to each of the counterweights.

[0026] The embodiment of the present application also provides a control method for a heavy-load elevator, the heavy-load elevator comprising a traction device, a car device, two counterweight devices, a position detection device and a control system; the traction device is configured to be installed on a load-bearing frame, the traction device comprises a traction machine, two traction wheels and a traction rope respectively wound around each of the traction wheels, the two traction wheels are respectively installed at both ends of the traction machine to be synchronously driven by the traction machine; the car-side rope bodies of the two traction ropes are configured to be connected to the car device, the counterweight-side rope bodies are respectively connected to one counterweight device, and the two counterweight devices are arranged on the same side of the car device along the car depth direction; wherein a plurality of the position detection devices are arranged on the top of the car device, and each of the position detection devices is configured to obtain the instantaneous height H of the position at which it is located itk ;

[0027] The control method comprises:

[0028] Get the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device is overloaded; wherein the original height H it0 The instantaneous height obtained by each of the position detection devices when the door of the car device is initially opened;

[0029] When it is determined that the car device is overloaded, an overload prompt message is issued.

[0030] In one embodiment, the instantaneous height H is obtained. itk With the original height H it0 Height difference △H i , according to the height difference △H i Determining whether the car device is overloaded includes:

[0031] Calculate the height difference ΔH of the position detection devices located on both sides of the same car frame i and / or, when the difference exceeds a first preset value, determining that the car device is overloaded; and / or

[0032] Calculate the height difference ΔH of the plurality of position detection devices i The height difference △H of each position detection device is calculated. i The elevator device is judged to be overloaded when the deviation exceeds a second preset value.

[0033] In one embodiment, the control method further includes:

[0034] controlling the car device to run at a rated speed when it is determined that the car device is not overloaded;

[0035] When it is determined that the car device is overloaded, the car device is controlled to run at an overload speed lower than the rated speed.

[0036] In one embodiment, the control method further includes:

[0037] When the car device runs to the nearest floor and the car device is in an overload state, controlling the car device to re-level at the nearest floor;

[0038] Based on whether the car device is overloaded after re-leveling, the car device is controlled to run at an overload speed or a rated speed.

[0039] The technical solution provided by the embodiment of the present application is to enable stable operation when carrying a large load. A traction machine is set to synchronously drive two traction wheels, so that the two traction wheels can synchronously drive the two traction ropes to run. The two traction ropes pull the car device, which can help improve the load-bearing capacity of the elevator. Moreover, the two traction ropes are each connected to a counterweight device. The two counterweight devices are arranged on one side so that the car device is evenly stressed, which plays a good balancing role on the elevator and is conducive to improving the running stability of the elevator. Especially for elevators with larger car sizes, the problem of car tilting when the elevator is carrying a large load and overloaded can be alleviated. In addition, the heavy-load elevator provided by the present application detects whether the elevator is overloaded in real time by setting the position information detected by multiple position detection devices. The operator can put the elevator in a suitable working state according to the overload prompt information, thereby avoiding the problems of unstable operation, high failure rate, short life and safety risks caused by overloading of the heavy-load elevator due to overloading.

[0040] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0042] Figure 1 The structure of a heavy-duty elevator according to one embodiment of the present application is shown in FIG. Figure 1 ;

[0043] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0044] Figure 3 The structure of a heavy-duty elevator according to one embodiment of the present application is shown in FIG. Figure 2 ;

[0045] Figure 4 for Figure 3 A top view of the heavy-duty elevator shown;

[0046] Figure 5 for Figure 3 A side view of the heavy-duty elevator shown;

[0047] Figure 6 for Figure 3 The partial structural diagram of the heavy-duty elevator shown is viewed from the counterweight side;

[0048] Figure 7 This is a schematic diagram of the rope winding of the counterweight-side rope body of the traction rope according to one embodiment of the present application;

[0049] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0050] Fig. 9 The figure is a schematic diagram of the rope winding of the car side rope body of the traction rope according to one embodiment of the present application.

[0051] Description of reference numerals:

[0052] 1- traction device; 11- traction machine; 12- traction wheel; 2- car device; 21- car; 211- car frame; 212- car floor; 22- car top wheel; 3- counterweight device; 31- counterweight; 32- counterweight frame; 33- counterweight wheel; 41- car top return rope pulley; 42- car side steering wheel; 43- counterweight return rope pulley; 44- counterweight side steering wheel; 5- load-bearing frame; 6- position detection device; 7- magnetic strip. DETAILED DESCRIPTION

[0053] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0054] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0055] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0056] The embodiment of the present application provides a heavy-duty elevator, such as Figure 1-Figure 5 As shown, it includes a traction device 1, a car device 2, two counterweight devices 3, a position detection device 6 and a control system.

[0057] The traction device 1 is configured to be installed on a load-bearing frame 5, and the load-bearing frame 5 is disposed at the top of the elevator shaft. The traction device 1 includes a traction machine 11, two traction wheels 12, and traction ropes respectively wound around each traction wheel 12. The two traction wheels 12 are respectively installed at both ends of the traction machine 11 so as to be synchronously driven by the traction machine 11; the car side rope bodies of the two traction ropes are configured to be connected to the car device 2, and the counterweight side rope bodies are respectively connected to a counterweight device 3, and the two counterweight devices 3 are arranged on the same side of the car device 2 along the depth direction of the car. Among them, the traction rope on a traction wheel 12 in this application is defined as a traction rope, and each traction rope can be one or more. The car side rope body refers to a part of the rope body located on one side of the traction wheel and used to connect to the car device 2, and the counterweight side rope body refers to a part of the rope body located on the other side of the traction wheel 12 and used to connect to the counterweight device 3.

[0058] The car device 2 is provided with a plurality of position detection devices 6, each of which is configured to obtain the instantaneous height H of the position at which it is located. itk , the control system is set to: obtain the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device 2 is overloaded, and issue an overload prompt message when it is determined that the car device 2 is overloaded; wherein the original height H it0 is the instantaneous height H obtained by each position detection device 6 when the car device 2 first opens the door itk .

[0059] That is to say, the control system first obtains the instantaneous height H of each position of the car device 2 in real time through the position detection device 6. itk, where the instantaneous height detected by each position detection device 6 when the elevator door just opens is the original height H it0 When the cargo enters the car, during the elevator door opening process and during the elevator operation, the instantaneous height H of each position of the car itk Compared with the original height H it0 There will be a height difference △H i =H itk -H it0 , when the height difference exceeds the limit, the car device 2 is overloaded. The heavy-duty elevator provided in the embodiment of the present application is capable of stable operation when carrying a large load. A traction machine 11 is provided to synchronously drive two traction wheels 12, so that the two traction wheels 12 can synchronously drive the two traction ropes to run. The car device 2 is pulled by the two traction ropes, which can help improve the load-bearing capacity of the elevator. Moreover, the two traction ropes are each connected to a counterweight device 3. The two counterweight devices 3 are arranged on one side so that the force on the car device 2 is uniform, which has a better balancing effect on the elevator and is conducive to improving the running stability of the elevator. Especially for elevators with larger car sizes, the problem of car tilting when the elevator is carrying a large load and overloaded can be reduced.

[0060] Moreover, the heavy-loaded elevator provided in the present application detects in real time whether the elevator is overloaded by setting up multiple position detection devices 6 to obtain position information. The operator can put the elevator in a suitable working state based on the overload prompt information, thereby avoiding the problem of unstable operation, high failure rate, short life and safety risks caused by overloading of the heavy load.

[0061] In one embodiment, Figure 1 and Figure 2 As shown, in order to enable the position detection device 6 to obtain the instantaneous height H of the position itk A detection reference is provided corresponding to each position detection device 6, and the detection reference can be a magnetic stripe 7. The magnetic stripe 7 is installed in the hoistway and runs through the travel of the car. The position detection device 6 can read the position information on the magnetic stripe 7 and transmit it to the control system.

[0062] In one embodiment, the car device 2 includes a plurality of car frames 211 arranged in sequence along the depth direction of the car, and a position detection device 6 is respectively arranged on both sides of each car frame 211. The position detection device 6 is arranged on the top crossbeam of the car frame 211. It can be understood that the position detection device 6 can also be arranged at other positions of the car frame 211, or on the top wheel of the car. The control system can be configured to: when a height difference △H of the position detection devices 6 located on both sides of the same car frame 211 is detected i When the difference exceeds a first preset value, it is determined that the car device 2 is overloaded.

[0063] Specifically, the height difference between the instantaneous height and the original height of each position detection device 6 is compared, that is, the height H at the tkth moment itk The height H when the elevator door just opens it0 Take the difference and get the height difference △H i =H itk -H it0 , the height difference of different position detection devices 6 at time tk is △H i-j =△H i -△H j , the first preset value can be set to 2 mm, then in the car width direction, the height difference of the position detection device 6 on both sides of the same car frame is △H i-j When >2mm, the height difference exceeds the limit, and it is determined that the car device 2 is overloaded in the car width direction.

[0064] The control system can also be configured to calculate the height difference ΔH of the plurality of position detection devices 6: i The average value of , then calculate the height difference △H of each position detection device 6 i Deviation from the mean value △H i -△H 平均 When the deviation exceeds a second preset value, it is determined that the car device 2 is overloaded.

[0065] In one example, the second preset value is set to 20 mm, then ΔH i -△H 平均 When it is >20mm, the height difference exceeds the limit and it is determined that the car device 2 is overloaded.

[0066] In this example, the height difference ΔH of the plurality of position detection devices 6 is calculated. i The average value of △H 平均 , and calculate the height difference △H of each position detection device 6 i Deviation from the mean value △H i -△H 平均 , the unbalanced load state of each position detection device 6 can be obtained.

[0067] In some embodiments, the control system is configured to: when it is determined that the car device 2 is not overloaded, the car device 2 is controlled to run at a rated speed; when it is determined that the car device 2 is overloaded, the car device 2 is controlled to run at an overload speed lower than the rated speed. The overload speed may be a maintenance speed during elevator maintenance, or a low speed of other values.

[0068] When the car device 2 runs to the nearest floor and the car device 2 is in an overloaded state, the control system can also be configured to: control the car device 2 to re-level at the nearest floor, and control the car device 2 to run at an overloaded speed or a rated speed based on whether the car device 2 is overloaded after re-leveling. The nearest floor refers to the floor closest to the elevator during the operation of the elevator.

[0069] The operation of the elevator when an overload condition occurs in a car device is described below.

[0070] When the car door opens and the cargo enters the car, the height difference △H described above i The calculation is used to determine whether the car device 2 is overloaded. When it is determined that the car device 2 is overloaded, the control system can issue an overload alarm and prompt the overload situation through the display device in the car, and prompt how to adjust the loading situation in the car.

[0071] After the car door is closed, the alarm sound is turned off. If the height difference does not exceed the limit (i.e. the car device 2 is not in an unbalanced state), the car device 2 is controlled to run at the rated speed; if the height difference exceeds the limit (i.e. the car device 2 is in an unbalanced state), a voice prompt is given that the car is in an unbalanced state, and the car device 2 is controlled to run at an unbalanced speed.

[0072] When the car device 2 is running at the rated speed, if the control system obtains the information that the height difference exceeds the limit, the elevator issues a prompt message of overload (not an alarm sound), and may also issue an alarm sound at the same time, and reduce the car running speed, so that the car device 2 runs at the overload speed; if during the operation at the overload speed, the height difference is reduced to below the limit value, the elevator issues a prompt message that the elevator is not overloaded, and increases the running speed of the car device to run at the rated speed.

[0073] When the car runs to the nearest floor at an eccentric load speed and the height difference has not been reduced to below the limit value, the car device 2 is controlled to re-level at the nearest floor. After re-leveling, if the height difference is reduced to below the limit value, it will be restarted and run at the rated speed; when the height difference still exceeds the limit value, the elevator will start and run at the eccentric load speed.

[0074] When the car device 2 runs to the designated floor at the inspection speed in the eccentric load state, after the goods leave the car (after the weighing device returns to zero or is less than a certain value), the height difference at this time is calculated. If the height difference still exceeds the limit value, notify the maintenance to check the elevator condition.

[0075] In one embodiment, Figure 1-Figure 5As shown, the traction machine 11 is located in the middle position of the car device 2 in the depth direction of the car, and the two counterweight devices 3 are respectively arranged on both sides of the middle position, so that the center of gravity of the counterweight device 3 and the car device 2 can be consistent in the depth direction of the car, which is beneficial to the smooth operation of the car device 2.

[0076] In one embodiment, the heavy-duty elevator further comprises a plurality of car top return pulleys 41 and a plurality of counterweight return pulleys 43 mounted on the load-bearing frame 5; the car device 2 comprises a car 21 and a plurality of car top wheels 22 mounted on the top of the car 21, and each counterweight device 3 comprises a counterweight 31 and a plurality of counterweight wheels 33 mounted on the top of the counterweight 31; the two traction ropes are arranged such that after the counterweight side rope bodies respectively pass through the corresponding counterweight wheels 33 and counterweight return pulleys 43, the ends are connected to the first predetermined structure, which can be arranged on the load-bearing frame 5 or the counterweight device 3; the car side rope bodies of the two traction ropes are arranged such that after passing through the corresponding car top wheels 22 and car top return pulleys 41, the ends are connected to the second predetermined structure, which can be arranged on the load-bearing frame 5 or the car device 2. By arranging a plurality of car top wheels 22 and car top return pulleys 41 and a plurality of counterweight wheels 33 and counterweight return pulleys 43, the traction ratio of the elevator can be increased, thereby enhancing the load-bearing capacity of the elevator.

[0077] In order to make the car device 2 and the two counterweight devices 3 run synchronously, the traction ratio of the counterweight side and the car side of each traction rope is equal. In one embodiment, in order to make the traction ratio of the counterweight side and the car side equal, the first predetermined structure and the second predetermined structure are both arranged on the load-bearing frame 5, that is, the counterweight side rope body and the car side rope body of each traction rope are connected to the load-bearing frame 5 after passing the counterweight wheel 33 and the counterweight return rope wheel 43. In another embodiment, the first predetermined structure can also be arranged on the counterweight device, and the second predetermined structure can be arranged on the car device 2. That is, the counterweight side rope body of each traction rope is fixed to the counterweight device 3 after passing the corresponding counterweight wheel 33 and the counterweight return rope wheel 43, and the car side rope body is fixed to the car device 2 after passing the corresponding car top wheel 22 and the car top return rope wheel 41.

[0078] like Figure 3 and Figure 4 As shown (combined with Figure 6 and Figure 7 ), a plurality of counterweight return rope pulleys 43 are arranged at both ends of the traction machine 11, and the counterweight return rope pulley 43 at each end corresponds to a plurality of counterweight pulleys 33 on a counterweight device 3, and the traction ropes on the two traction wheels 12 are respectively connected to the counterweight pulley 33 and the counterweight return rope pulley 43 at the corresponding ends. Similarly, the car top wheel 22 and the car top return rope pulley 41 are also divided into two parts, and each traction rope is respectively connected to the corresponding part of the car top wheel 22 and the corresponding part of the car top return rope pulley 41.

[0079] In one embodiment, each counterweight device 3 is provided with at least one row of counterweight wheels 33, and each row of counterweight wheels 33 is arranged along the depth direction of the car. The multiple counterweight return pulleys 43 corresponding to each counterweight device 3 are arranged in at least one row, and each row of counterweight return pulleys 43 corresponds to a row of counterweight wheels 33 respectively.

[0080] Among them, when each counterweight device 3 is provided with multiple rows of counterweight wheels 33, a counterweight side steering wheel 44 which is axially perpendicular to the counterweight wheels 33 is also provided on the load-bearing frame 5, and the counterweight side steering wheel 44 is arranged between each two adjacent rows of counterweight return rope wheels 43, so as to be used for the traction rope to be diverted from one row of counterweight wheels 33 through the counterweight side steering wheel 44 to be wound around another row of counterweight wheels 33.

[0081] When the elevator is configured to require a larger counterweight device 3, each counterweight device 3 can be provided with a plurality of relatively fixed counterweights along the width direction of the car. Figure 6 In the example shown, each counterweight device 3 is provided with two counterweights 31, and each counterweight 31 is provided with a row of counterweight wheels 33. In this example, each counterweight 31 can be provided with a counterweight frame 32, and the two counterweight frames 32 are fixed together, and each counterweight frame 32 is provided with a row of counterweight wheels 33. Of course, multiple counterweights can also be provided with one counterweight frame, and each counterweight frame is provided with one or more rows of counterweight wheels 33.

[0082] exist Figure 1-Figure 8 In the example, each counterweight device 3 is provided with two rows of counterweight wheels 33, and the load-bearing frame 5 is provided with two rows of counterweight anti-ropes 43 corresponding to the two rows of counterweight wheels 33, referring to Figure 8 The two rows of counterweight wheels 33 on each counterweight device 3 are respectively the first counterweight wheel d1, the second counterweight wheel d2, ..., the tenth counterweight wheel d10, and every five counterweight wheels 33 form a row. The corresponding two rows of counterweight return rope wheels 43 above are respectively the first counterweight return rope wheel e1, the second counterweight return rope wheel e2, ..., the eighth counterweight return rope wheel e8, and every four counterweight return rope wheels 43 form a row. Among them, a counterweight side steering wheel 44 is arranged at the end of the two rows of counterweight return rope wheels 43 and between the two bottles of counterweight return rope wheels 43.

[0083] Figure 7 and Figure 8The connection state between the traction rope on one traction wheel 12 and the counterweight wheel 33 and the counterweight return rope wheel 43 of the corresponding counterweight device 3 in this example is shown. The counterweight side rope body of the traction rope extends downward from the traction wheel 12 to be wound around the first counterweight wheel d1, then upwardly wound around the first counterweight anti-rope wheel e1, and then continues to be wound around the second counterweight wheel d2, the second counterweight anti-rope wheel e2, the third counterweight wheel d3, the third counterweight anti-rope wheel e3, the fourth counterweight wheel d4, the fourth counterweight anti-rope wheel e4, and after being wound around the fifth counterweight wheel d5, it is upwardly wound around the counterweight side steering wheel 44, so as to be turned through the counterweight side steering wheel 44 and wound around the sixth counterweight wheel d6 in the second row, and from the sixth counterweight wheel d6, it passes through the fifth counterweight anti-rope wheel e5, the seventh counterweight wheel d7, the sixth counterweight anti-rope wheel e6, the eighth counterweight wheel d8, the seventh counterweight anti-rope wheel e7, the ninth counterweight wheel d9, the eighth counterweight anti-rope wheel e8 in turn, and after passing around the tenth counterweight wheel d10, the end is fixed on the load-bearing frame 5.

[0084] In one embodiment, multiple rows of car top wheels 22 corresponding to each traction rope are arranged, each row of car top wheels 22 is arranged along the width direction of the car, and the axial direction of the car top wheels 22 is arranged along the depth direction of the car; multiple car top return rope pulleys 41 are arranged in multiple rows, each row of car top return rope pulleys 41 is arranged along the width direction of the car and corresponds to a row of car top wheels 22, and the axial direction of the car top return rope pulley 41 is parallel to the axial direction of the car top wheel 22.

[0085] The load-bearing frame 5 is also provided with a car side steering wheel 42 which is axially perpendicular to the car top wheel 22. A car side steering wheel 42 is provided between each two adjacent rows of car top return rope wheels 41 to redirect the traction rope from one row of car top wheels 22 through the car side steering wheel 42 to be wound around another row of car top wheels 22.

[0086] like Figure 3-Figure 4 and Fig. 9 In the example, five rows of car top wheels 22 are provided for each traction rope, and each row is provided with two car top wheels 22. A corresponding row of car top return rope wheels 41 is provided above each row of car top wheels 22, and a car side steering wheel 42 is provided between each two adjacent rows of car top return rope wheels 41. Of course, the number of rows of car top wheels 22 and the number of each row can be set according to the required traction ratio and the preset load arrangement of the elevator.

[0087] In this example, the car 21 includes a plurality of car frames 211 arranged in sequence along the depth direction of the car, and each row of car top wheels 22 is arranged in a car frame 211. Each car frame 211 may be configured to include an upper crossbeam located at the top, a lower crossbeam located at the bottom, and connecting columns located at both sides, the length direction of the upper crossbeam is the width direction of the car, each row of car top wheels 22 is configured to be arranged along the length direction of the upper crossbeam, and the car bottom plate 212 may be placed on the lower crossbeams of the plurality of car frames 211.

[0088] Fig. 9FIG. 4 shows the connection state between a traction rope on a traction wheel 12 and a car top wheel 22 and a car top return rope wheel 41, as shown in FIG. Fig. 9 As shown, the five rows of car top wheels 22 corresponding to the traction rope on one of the traction wheels 12 are the first car top wheel a1, the second car top wheel a2..., the tenth car top wheel a10, two in a row, and the five rows of car top return rope wheels 41 above are the first car top return rope wheel b1, the second car top return rope wheel b2..., the tenth car top return rope wheel b10, and the multiple car side steering wheels 42 are the first car side steering wheel c1, the second car side steering wheel c2..., the eighth car side steering wheel c8, and two car side steering wheels 42 are arranged between every two adjacent rows of car top return rope wheels 41. The traction rope extends downward from the traction wheel 12, passes around the first car top wheel a1 of the first row, passes around the first car top return rope wheel b1 and the second car top return rope wheel b2 in sequence upward from the first car top wheel a1, then passes around the second car top wheel a2 downward, passes around the first car side steering wheel c1 and the second car side steering wheel c2 upward from the second car top wheel a2, then passes around the car top wheel a3 of the second row downward, then passes around the third car top return rope wheel b3 and the fourth car top return rope wheel b4 in sequence upward, then passes around the The fourth car top wheel a4, after bypassing the third car side steering wheel c3 and the fourth car side steering wheel c4 upward in sequence, is downwardly wrapped around the car top wheel of the third row, and so on is repeated until it is wrapped around the ninth car top wheel a9 of the fifth row through the steering of the seventh car side steering wheel c7 and the eighth car side steering wheel c8, and bypasses the ninth car top return rope pulley b9 and the tenth car top return rope pulley b10 upward in sequence, and then bypasses the tenth car top wheel a10 downward, and the end is fixed on the load-bearing frame 5.

[0089] It is understandable that the number of rows of the counterweight wheel 33 and the counterweight return rope wheel 43 as well as the car top wheel 22 and the car top return rope wheel 41 and the number of each row can be specifically set according to the traction ratio, which is not limited here. In addition, the arrangement of the counterweight wheel 33 and the counterweight return rope wheel 43 as well as the car top wheel 22 and the car top return rope wheel 41 is not limited to the above, and other arrangements can also be used.

[0090] Figure 7-Figure 9 Only the connection status of one of the traction ropes and the counterweight wheel 33, the counterweight return rope pulley 43, the car top wheel 22 and the car top return rope pulley 41 is shown. The connection status of the traction rope on the corresponding other traction wheel 12 and the counterweight wheel 33, the counterweight return rope pulley 43, the car top wheel 22 and the car top return rope pulley 41 can be the same or different, but the traction ratio of the two must be the same to ensure the synchronous operation of the car device 2 and the counterweight device 3.

[0091] In one embodiment, the top wheels 22 are evenly arranged in the depth direction of the car. Figure 3 Figure 5In the example shown, the multiple car frames 211 of the car 21 are evenly arranged along the depth direction of the car, and the same number of car top wheels 22 are provided on each car frame 211.

[0092] In another embodiment, a plurality of car top wheels 22 are arranged non-uniformly in the depth direction of the car. For example, for a large load elevator, due to its large area, it is usually used to carry a specific large carrier (such as a container truck) instead of carrying a plurality of smaller flat carriers (such as a plurality of pallets). For an elevator carrying a large carrier, the concentrated load is located at the connection position between the carrier and the car bottom (such as the wheels of a container truck). Therefore, the car top wheels 22 can be arranged non-uniformly. The density of the car top wheels 22 arranged at the position where the force is concentrated is relatively large, which can not only make the operation more stable, but also help the load concentrated part not exceed the load-bearing capacity of the car frame at that part.

[0093] In some embodiments, the car 21 includes a plurality of car frames 211 arranged in sequence along the depth direction of the car. To prevent the force at the load concentration position from exceeding the rated load of the car frame at that position, the number of car top wheels 22 on each car frame 211 can be reasonably arranged.

[0094] Specifically, the following method can be used to check whether the load exceeds the carrying capacity of each car frame 211:

[0095] The elevator traction ratio is set to r, and the rated load of each car top wheel 22 is , where Q is the rated load of the elevator. The number of car frames 211 is j, and the number of car top wheels 22 on the a-th car frame 211 is n a , then the rated load on the car frame 211 is .

[0096] If the influence of the adjacent car frame on the load calculation of the i-th car frame 211 is k b , where b is the number of frames adjacent to the ith frame. For example, the effect of the frame closest to the ith frame on the load of the ith frame is k 1 , k 1 =1, as b increases, k b Reduce. b The calculation is related to the car height and the distance between adjacent car frames.

[0097] When the elevator is running, the load limit F of the i-th car frame 211 2 The rated load and influence coefficient k of each car frame 211 are b The sum of products is shown below:

[0098]

[0099] When the elevator is loaded, since the car is in a stationary state, the load limit F of the i-th car frame 211 is 1 , is the rated load and influence coefficient k of each car frame 211 b 1.25 times the sum of the products, as shown in the following formula:

[0100]

[0101] Compare the values ​​of concentrated loads (such as vehicles) at different locations on different frames in the car. 0 With F 2 and F 2 The size of F 0 < F 1 And F 0 < F 2 When the car top wheel 22 is arranged reasonably.

[0102] The embodiment of the present application also provides a control method for a heavy-load elevator, the heavy-load elevator comprising a traction device, a car device, two counterweight devices, a position detection device and a control system; the traction device is configured to be installed on a load-bearing frame, the traction device comprises a traction machine, two traction wheels and a traction rope respectively wound around each of the traction wheels, the two traction wheels are respectively installed at both ends of the traction machine to be synchronously driven by the traction machine; the car-side rope bodies of the two traction ropes are configured to be connected to the car device, the counterweight-side rope bodies are respectively connected to one counterweight device, and the two counterweight devices are arranged on the same side of the car device along the car depth direction; wherein a plurality of the position detection devices are arranged on the top of the car device, and each of the position detection devices is configured to obtain the instantaneous height H of the position at which it is located itk .

[0103] The control method comprises:

[0104] Get the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device is overloaded; wherein the original height H it0 The instantaneous height obtained by each of the position detection devices when the door of the car device is initially opened;

[0105] When it is determined that the car device is overloaded, an overload prompt message is issued.

[0106] In one embodiment, the instantaneous height H is obtained. itk With the original height H it0 Height difference △H i , according to the height difference △H iDetermining whether the car device is overloaded includes:

[0107] Calculate the height difference ΔH of the position detection devices located on both sides of the same car frame i and / or, when the difference exceeds a first preset value, determining that the car device is overloaded; and / or

[0108] Calculate the height difference ΔH of the plurality of position detection devices i The height difference △H of each position detection device is calculated. i The elevator device is judged to be overloaded when the deviation exceeds a second preset value.

[0109] In one embodiment, the control method further includes:

[0110] controlling the car device to run at a rated speed when it is determined that the car device is not overloaded;

[0111] When it is determined that the car device is overloaded, the car device is controlled to run at an overload speed lower than the rated speed.

[0112] In one embodiment, the control method further includes:

[0113] When the car device runs to the nearest floor and the car device is in an overload state, controlling the car device to re-level at the nearest floor;

[0114] Based on whether the car device is overloaded after re-leveling, the car device is controlled to run at an overload speed or a rated speed.

[0115] The specific process of controlling the operation of a heavy-load elevator using the control method for the heavy-load elevator provided in the present application can refer to the embodiments described above.

[0116] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0117] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0118] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0119] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0120] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0121] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0122] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heavy-duty elevator, characterized in that: It includes a traction device, a car device, two counterweight devices, a position detection device and a control system; The traction device is arranged to be installed on the load-bearing frame, and the traction device comprises a traction machine, two traction wheels and a traction rope respectively wound around each of the traction wheels, the two traction wheels are respectively installed at both ends of the traction machine to be synchronously driven by the traction machine; the car side rope bodies of the two traction ropes are arranged to be connected to the car device, and the counterweight side rope bodies are respectively connected to one of the counterweight devices, and the two counterweight devices are arranged on the same side of the car device along the depth direction of the car; Wherein, a plurality of position detection devices are arranged on the top of the car device, and each position detection device is arranged to obtain the instantaneous height H of the position at which it is located. itk , the control system is set to: obtain the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device is overloaded, and issue an overload prompt message when it is determined that the car device is overloaded; wherein the original height H it0 The instantaneous height obtained by each of the position detection devices when the door of the car device is initially opened; The car device comprises a plurality of car frames arranged in sequence along the depth direction of the car, and the position detection device is respectively arranged on both sides of each of the car frames; The control system is configured as follows: the height difference ΔH of the position detection devices located on both sides of the same car frame i When the difference between exceeds a first preset value, it is determined that the car device is overloaded; The control system is further configured to calculate the height difference ΔH of the plurality of position detection devices. i The height difference △H of each position detection device is calculated. i The deviation from the average value is greater than a second preset value, and when the deviation exceeds a second preset value, it is determined that the car device is overloaded.

2. The heavy-load elevator according to claim 1, characterized in that: The control system is configured to: control the car device to run at a rated speed when it is determined that the car device is not overloaded, and control the car device to run at an overload speed lower than the rated speed when it is determined that the car device is overloaded.

3. The heavy-load elevator according to claim 2, characterized in that: The control system is also configured to: when the car device runs to the nearest floor and the car device is in an overloaded state, control the car device to re-level at the nearest floor; and control the car device to run at an overloaded speed or a rated speed based on whether the car device is overloaded after re-leveling.

4. The heavy-duty elevator according to any one of claims 1 to 3, characterized in that: The traction machine is located at the middle position of the car device in the depth direction of the car, and the two counterweight devices are respectively arranged on both sides of the middle position.

5. The heavy-load elevator according to claim 4, characterized in that: It also includes a plurality of car top return rope pulleys and a plurality of counterweight return rope pulleys installed on the load-bearing frame; The car device comprises a car and a plurality of car top wheels mounted on the top of the car, and each of the counterweight devices comprises a counterweight and a plurality of counterweight wheels mounted on the top of the counterweight; The two traction ropes are configured as follows: the counterweight side rope body is respectively passed around the corresponding counterweight wheel and the counterweight return rope pulley, and the end is connected to the first predetermined structure; the car side rope body is configured to be respectively passed around the corresponding car top wheel and the car top return rope pulley, and the end is connected to the second predetermined structure.

6. The heavy-load elevator according to claim 5, characterized in that: The first predetermined structure and the second predetermined structure are both arranged on the load-bearing frame; Alternatively, the first predetermined structure is provided on the counterweight device, and the second predetermined structure is provided on the car device.

7. The heavy-load elevator according to claim 6, characterized in that: The car top wheels corresponding to each traction rope are arranged in multiple rows, each row of the car top wheels is arranged along the width direction of the car, and the axial direction of the car top wheels is arranged along the depth direction of the car; The plurality of car top return rope pulleys are arranged in a plurality of rows, each row of the car top return rope pulleys corresponds to a row of the car top wheels, and the axial direction of the car top return rope pulley is parallel to the axial direction of the car top wheels; The load-bearing frame is also provided with a car side steering wheel which is axially perpendicular to the car top wheel. The car side steering wheel is provided between each two adjacent rows of the car top return rope wheels so that the traction rope is turned from one row of the car top wheels through the car side steering wheel to be wound around another row of the car top wheels.

8. The heavy-load elevator according to claim 7, characterized in that: Each row of the car top wheels is arranged on a car frame of the car device.

9. The heavy-load elevator according to claim 5, characterized in that: The plurality of car top wheels are evenly arranged in the depth direction of the car, or the plurality of car top wheels are unevenly arranged in the depth direction of the car.

10. The heavy-load elevator according to claim 5, characterized in that: Each of the counterweight devices is provided with at least one row of counterweight wheels, each row of the counterweight wheels is arranged along the depth direction of the car, and the plurality of counterweight return rope wheels corresponding to each of the counterweight devices are arranged in at least one row, and each row of the counterweight return rope wheels corresponds to one row of the counterweight wheels respectively; Wherein, when each counterweight device is provided with multiple rows of counterweight wheels, the load-bearing frame is also provided with a counterweight side steering wheel which is perpendicular to the axial direction of the counterweight wheels, and the counterweight side steering wheel is provided between each two adjacent rows of the counterweight return rope wheels, so as to allow the traction rope to be diverted from one row of the counterweight wheels through the counterweight side steering wheel to be wound around another row of the counterweight wheels.

11. The heavy load elevator according to claim 10, characterized in that: Each of the counterweight devices comprises a plurality of counterweights which are arranged along the width direction of the car and are relatively fixed, and a row of counterweight wheels is arranged corresponding to each of the counterweights.

12. A control method for a heavy-load elevator, characterized in that: The heavy-load elevator comprises a traction device, a car device, two counterweight devices, a position detection device and a control system; the traction device is arranged to be installed on a load-bearing frame, the traction device comprises a traction machine, two traction wheels and a traction rope respectively wound on each of the traction wheels, the two traction wheels are respectively installed at both ends of the traction machine to be synchronously driven by the traction machine; the car-side rope bodies of the two traction ropes are arranged to be connected to the car device, the counterweight-side rope bodies are respectively connected to one counterweight device, and the two counterweight devices are arranged on the same side of the car device along the car depth direction; wherein a plurality of the position detection devices are arranged on the top of the car device, and each of the position detection devices is arranged to obtain the instantaneous height H of the position at which it is located itk ; The control method comprises: Get the instant height H itk With the original height H it0 Height difference △H i , according to the height difference △H i Determine whether the car device is overloaded; wherein the original height H it0 The instantaneous height obtained by each of the position detection devices when the door of the car device is initially opened; When it is determined that the car device is overloaded, an overload prompt message is issued; Wherein, the instant height H is obtained itk With the original height H it0 Height difference △H i , according to the height difference △H i Determining whether the car device is overloaded includes: Calculate the height difference ΔH of the position detection devices located on both sides of the same car frame i and / or, when the difference exceeds a first preset value, determining that the car device is overloaded; and / or Calculate the height difference ΔH of the plurality of position detection devices i The height difference △H of each position detection device is calculated. i The elevator device is judged to be overloaded when the deviation exceeds a second preset value.

13. The control method according to claim 12, characterized in that: Also includes: controlling the car device to run at a rated speed when it is determined that the car device is not overloaded; When it is determined that the car device is overloaded, the car device is controlled to run at an overload speed lower than the rated speed.

14. The control method according to claim 13, characterized in that: Also includes: When the car device runs to the nearest floor and the car device is in an overload state, controlling the car device to re-level at the nearest floor; Based on whether the car device is overloaded after re-leveling, the car device is controlled to run at an overload speed or a rated speed.

Images