CN115893146A - Elevator speed limiting device capable of switching two rated speeds at any time and elevator speed increasing method - Google Patents
Elevator speed limiting device capable of switching two rated speeds at any time and elevator speed increasing method Download PDFInfo
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Abstract
The invention relates to an elevator speed limiting device capable of switching two rated speeds at any time, which comprises: a rated speed detection mechanism and a stopping mechanism arranged on the rope wheel; the rated speed detection mechanism comprises a centrifugal motion part and an elastic part which are rotationally connected with the rope wheel through a rotating shaft, the centrifugal motion part performs centrifugal motion along with the rotation of the rope wheel, one end of the elastic part is movably connected with one end of the centrifugal motion part, the other end of the elastic part is movably connected with the rope wheel, the elastic part is used for adjusting pressure applied to the centrifugal motion part, and the pressure is opposite to the centrifugal force generated by the centrifugal motion part performing centrifugal motion; the stopping mechanism is arranged on the bracket of the rope wheel, is electrically connected with the elevator controller and is used for limiting the movement of the centrifugal moving part; when the stopping mechanism acts, the rated speed detection mechanism is used for detecting the rated speed of one type of elevator car operation, and when the stopping mechanism does not act, the rated speed detection mechanism is used for detecting the rated speed of the other type of elevator car operation.
Description
Technical Field
The invention relates to an elevator speed limiting device capable of switching two rated speeds at any time and an elevator speed increasing method, and belongs to the technical field of elevator speed limiters and speed increasing elevators.
Background
An elevator speed limiter is one of safety control components in an elevator safety protection system. When the elevator runs at a speed exceeding the rated speed or falls due to any reason or under the condition that all other safety protection devices do not work, the speed limiter and the safety tongs perform linkage action to stop the elevator car on the guide rail, so that the safety of people and equipment is ensured.
With the continuous development of elevators, elevator systems capable of switching two rated speeds during operation have appeared, for example, the invention patent with the patent number "CN109969879a" discloses an elevator and a control method for operating at different speeds in different areas, which controls an elevator car to operate at different rated speeds in different areas of a hoistway, so as to improve the overall operating speed of the elevator;
however, there is almost no speed governor that can be matched with such a multi-rated speed elevator, and conventionally, as an invention patent of patent No. CN104583108a, there is provided an elevator apparatus in which a rated speed at the time of elevator car rising and a rated speed at the time of falling are different, a sheave and two kinds of driven sprockets supported by a horizontal shaft and around which the upper end of a governor rope is wound are provided, and a transmission chain is slidable to a gear of either of the two kinds of driven sprockets, and the transmission chain is switched to the driven sprocket via a sliding means in accordance with the running direction of the elevator car, and a predetermined overspeed at the time of rising is detected by a speed regulating portion and a predetermined overspeed at the time of falling is detected by driving a bevel gear and a driven bevel gear; this prior art utilizes the drive structure of chain sprocket to carry out the gear switching when the elevator rises and descends, realizes detecting different rated speed, but the problem that this prior art exists is, can not switch at any time, only can switch when the elevator stops to the mode that switches through the drive structure of chain sprocket can have the condition of chain disconnection or chain rupture, leads to out of control, can't ensure reliable elevator overspeed protection.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an elevator speed limiting device and an elevator speed increasing method capable of switching two rated speeds at any time.
The technical scheme of the invention is as follows:
on one hand, the invention provides an elevator speed limiting device capable of switching two rated speeds at any time, which comprises:
a rated speed detection mechanism and a stopping mechanism arranged on the rope wheel;
the rated speed detection mechanism comprises a centrifugal motion part and an elastic part, wherein the centrifugal motion part is rotationally connected with the rope wheel through a rotating shaft, the centrifugal motion part performs centrifugal motion along with the rotation of the rope wheel, one end of the elastic part is movably connected with one end of the centrifugal motion part, the other end of the elastic part is movably connected to the rope wheel, the elastic part is used for adjusting pressure applied to the centrifugal motion part, and the pressure is opposite to the centrifugal force generated by the centrifugal motion part performing centrifugal motion;
the stopping mechanism is arranged on a bracket of the rope pulley and is electrically connected with the elevator controller, and the stopping mechanism acts according to a command sent by the elevator controller and is used for limiting the movement of the centrifugal moving part;
when the stopping mechanism acts, the rated speed detection mechanism is used for detecting the rated speed of one type of elevator car operation, and when the stopping mechanism does not act, the rated speed detection mechanism is used for detecting the rated speed of the other type of elevator car operation.
As a preferred embodiment, the stopper mechanism includes a core, an extension piece, and a coil;
the iron core is arranged on a rotating shaft of the rope pulley and rotates along with the rope pulley;
the coil is fixed in front of the rope wheel through a bracket of the rope wheel and sleeved outside the iron core;
the coil is electrically connected with the elevator controller, and the coil is controlled to be powered on or powered off by the elevator controller;
the main part of centrifugal motion part not with the iron core interferes, be provided with the extension piece that a metal iron made on the centrifugal motion part, extension piece one end and centrifugal motion part fixed connection, the other end extends to the iron core towards the terminal surface within range of rope sheave with the iron core cooperation is inhaled and is released.
In a preferred embodiment, an RC series circuit is connected in parallel to both ends of the coil.
As a preferred embodiment, the centrifugal moving part comprises a first centrifugal moving structure and a second centrifugal moving structure;
the elastic component comprises a first elastic structure and a second elastic structure;
one end of the first elastic structure is movably connected with one end of the first centrifugal motion structure, the other end of the first elastic structure is movably connected to the rope wheel, and the first elastic structure is used for adjusting pressure applied to the end part of the first centrifugal motion structure; the first centrifugal motion structure performs centrifugal motion along with the rotation of the rope wheel;
one end of the second elastic structure is movably connected with one end of the second centrifugal motion structure, the other end of the second elastic structure is movably connected to the rope wheel, and the second elastic structure is used for adjusting pressure applied to the end part of the second centrifugal motion structure; the second centrifugal motion structure does centrifugal motion along with the rotation of the rope wheel;
the first centrifugal motion structure and the first elastic structure form a first rated speed detection assembly, the second centrifugal motion structure and the second elastic structure form a second rated speed detection assembly, and the two rated speed detection assemblies are arranged in the rope wheel in a mirror image mode by taking the circle center of the rope wheel as the midpoint;
the first rated speed detection assembly is used for detecting the first rated speed by adjusting the first elastic structure, and the second rated speed detection assembly is used for detecting the second rated speed by adjusting the second elastic structure, wherein the second rated speed is greater than the first rated speed;
when the stopping mechanism acts, a control force is applied to the first centrifugal motion structure, and the resultant force of the control force and the pressure applied by the first elastic force structure to the end part of the first centrifugal motion structure is greater than the centrifugal force generated on the first centrifugal motion structure when the rope wheel reaches the second rated speed.
As a preferred embodiment, said centrifugally moving part comprises a pair of third centrifugally moving structures and linkage rods; the two third centrifugal motion structures are arranged in the rope wheel in a mirror image mode by taking the circle center of the rope wheel as the midpoint, two ends of the linkage rod are respectively connected with the two third centrifugal motion structures, and the two third centrifugal motion structures synchronously move through the linkage rod;
the elastic component comprises a third elastic structure; one end of the third elastic structure is movably connected with one end of one third centrifugal motion structure, the other end of the third elastic structure is movably connected to the rope wheel, and the third elastic structure is used for adjusting pressure applied to the end part of the corresponding third centrifugal motion structure;
when the stop mechanism does not act, the two third centrifugal motion structures and the third elastic structure form a first rated speed detection assembly for detecting a first rated speed;
when the stopping mechanism acts, control force is applied to the two third centrifugal motion structures or one of the three centrifugal motion structures, and the two third centrifugal motion structures and the third elastic structure form a second rated speed detection assembly for detecting a second rated speed; the second rated speed is greater than the first rated speed.
On the other hand, the invention also provides an elevator speed-up method, which is realized on the basis of the elevator speed-limiting device capable of switching two rated speeds at any time according to any embodiment of the invention, and the method comprises the following steps:
dividing top and bottom regions of a hoistway into first rated speed regions;
when the elevator goes upwards, detecting whether the weight of the lift car is less than or equal to the weight of the balancing weight; when the weight of the lift car is less than or equal to the weight of the balancing weight, the elevator controller controls to send a command to the stopping mechanism, so that the stopping mechanism is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator ascends to a first rated speed area at the top of the shaft, the elevator controller controls to send an instruction to the stopping mechanism, so that the stopping mechanism is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed;
when the elevator descends, detecting whether the weight of the lift car is more than or equal to the weight of the balancing weight; when the weight of the lift car is more than or equal to the weight of the counterweight block, the elevator controller controls to send an instruction to the stopping mechanism, so that the stopping mechanism is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator descends to a first rated speed area at the bottom of the shaft, the elevator controller controls to send a command to the stopping mechanism, so that the stopping mechanism is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed.
The invention has the following beneficial effects:
1. the invention relates to an elevator speed limiting device capable of switching two rated speeds at any time, which is characterized in that a first rated speed detection mechanism and a second rated speed detection mechanism which respectively act independently are designed and respectively used for detecting the first rated speed and the second rated speed, a stop mechanism for limiting the first rated speed detection mechanism is arranged, and the first rated speed detection mechanism can be controlled not to work, so that the first rated speed detection mechanism and the second rated speed detection mechanism can really work independently without mutual influence, and an elevator system capable of being matched with the two rated speeds is realized; the elevator speed can be greatly improved, energy is saved, the building cost is greatly reduced, and the development of the elevator with double rated speeds is promoted.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a stopping mechanism according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a portion of the apparatus with a stop mechanism omitted according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a part of the apparatus without a stop structure according to a second embodiment of the present invention.
The reference numbers in the figures are:
1. a sheave; 100. a switch link; 101. a latch hook; 102. locking; 21. a first centrifugal motion structure; 22. a second centrifugal motion structure; 23. a first elastic structure; 24. a second elastic structure; 25. a third centrifugal motion structure; 26. a linkage rod; 27. a third elastic structure; 3. a stop mechanism; 31. an iron core; 311. an extension piece; 32. and a coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides an elevator governor capable of switching two rated speeds at any time, including:
a rated speed detection mechanism and a stop mechanism 3 which are arranged on the rope pulley 1; the rope wheel 1 is fixed to the top of the hoistway through a support and matched with a speed governor rope of an elevator, one end of the rope is connected with one end of the car, the other end of the rope is connected to the other end of the car after being wound on the rope wheel 1 and the rope tensioning wheel, the rope wheel 1 synchronously rotates along with the up-and-down movement of the car, the higher the movement speed of the car is, the higher the rotation speed of the rope wheel 1 is, the lower the movement speed of the car is, and the lower the rotation speed of the rope wheel 1 is.
The rated speed detection mechanism comprises a centrifugal motion part and an elastic part, wherein the centrifugal motion part and the elastic part are rotationally connected with the rope wheel 1 through a rotating shaft, the centrifugal motion part carries out centrifugal motion along with the rotation of the rope wheel 1, one end of the elastic part is movably connected with one end of the centrifugal motion part, the other end of the elastic part is movably connected onto the rope wheel 1, the elastic part is used for adjusting pressure applied to the centrifugal motion part, and the pressure is opposite to the centrifugal force generated when the centrifugal motion part carries out centrifugal motion.
When the rotating speed of the rope pulley 1 reaches a certain speed, the pressure applied to the centrifugal motion part by the elastic part is smaller than the centrifugal force generated by the rotation of the centrifugal motion part, one end of the centrifugal motion part, which is far away from the elastic part, rotates outwards, until the rotating speed of the rope pulley 1 exceeds a set rated speed, the end part of the centrifugal motion part can hit the switch connecting rod 100, the switch connecting rod 100 is connected with a switch, the switch connecting rod 100 is triggered to disconnect the switch, and the switch can control the elevator to stop; if the car runs at a speed higher than the set rated speed after touching the switch connecting rod 100, one end of the centrifugal motion part far away from the elastic part continuously rotates outwards to touch the lock hook 101 of the rope braking device, and when the centrifugal motion part touches the lock hook 101, the lock catch 102 of the rope braking device is unhooked, so that the clamp block of the rope braking device clamps the rope under the action of gravity, the car safety clamp is lifted, and the car is stopped.
The stopping mechanism 3 is arranged on a bracket of the rope pulley 1 and is electrically connected with an elevator controller, and the stopping mechanism 3 acts according to a command sent by the elevator controller and is used for limiting the movement of the centrifugal moving part;
when the stopping mechanism 3 is actuated, the rated speed detection mechanism is used for detecting the rated speed of one type of elevator car operation, and when the stopping mechanism 3 is not actuated, the rated speed detection mechanism is used for detecting the rated speed of the other type of elevator car operation; that is, the rated speed detecting means detects two rated speeds, which are different, respectively, when the stopper means 3 is actuated and not actuated; when the stop mechanism 3 acts and does not act, the rated speed detection mechanism works under different working conditions respectively, and the two working conditions work independently.
Based on the above embodiment, this embodiment can realize the adaptation of the elevator system with two rated speeds, and the specific method is as follows:
when the elevator is required to run at a rated speed, the stopping mechanism 3 is enabled to act through a command sent by an elevator controller, and when the speed of the elevator car exceeds a first rated speed, the rated speed detection mechanism is enabled to stop the elevator car;
when the elevator is required to run at another rated speed, the stopping mechanism 3 is enabled to be out of action through a command sent by the elevator controller, the centrifugal moving part can be limited after the stopping mechanism 3 is actuated, and therefore when the speed of the elevator car exceeds another rated speed, the rated speed detection mechanism can be enabled to act to stop the elevator car;
by this method, an elevator system adapted to double rated speeds can be realized.
As a preferred embodiment of the present embodiment, the elastic member may be an elastic structure having elasticity and restoring force, such as a spring, an elastic cord, or the like.
With particular reference to fig. 2, as a preferred embodiment of the present embodiment, the centrifugally moving parts are made of metallic iron, such as iron;
the stop mechanism 3 comprises an iron core 31, an extension piece 311 and a coil 32;
the iron core 31 is arranged on the rotating shaft of the rope pulley 1 and rotates along with the rope pulley 1;
the coil 32 is fixed in front of the rope pulley 1 through a bracket of the rope pulley 1 and sleeved outside the iron core 31; the sleeve is only sleeved outside the iron core 31, and the coil 32 is not fixed with the iron core 31 and does not move along with the iron core 31.
The coil 32 is electrically connected with the elevator controller, and the coil 32 is controlled to be electrified or deenergized by the elevator controller, so that the coil 32 is electrified to generate an electromagnetic field, the iron core 31 generates magnetic force, and the iron core 31 loses the magnetic force when the coil 32 is deenergized;
the main body of the centrifugal motion component does not interfere with the iron core 31, an extension piece 311 made of metal iron is arranged on the centrifugal motion component, one end of the extension piece 311 is fixedly connected with the centrifugal motion component, and the other end of the extension piece extends to the outline range of the iron core 31 to be matched with the iron core 31; that is, the body of the centrifugal moving part does not move within the contour of the iron core 31 in any state, and one end of the extension piece 311 remote from the centrifugal moving part extends within the contour of the iron core 31, so that when the iron core 31 generates a magnetic force, the extension piece 311 is caught, thereby restricting the movement of the centrifugal moving part by the extension piece 311.
With particular reference to fig. 3, in one embodiment of the present embodiment, the centrifugally moving parts comprise a first centrifugally moving structure 21 and a second centrifugally moving structure 22; the first centrifugal motion structure 21 and the second centrifugal motion structure 22 can be centrifugal motion structures of common elevator speed limiters such as a throwing block, a throwing sheet and a flying pendulum;
the middle part of the first centrifugal motion structure 21 is rotationally connected with a point a1 on the left side of the rope wheel 1 through a rotating shaft, and the middle part of the second centrifugal motion structure 22 is rotationally connected with a point a2 on the right side of the rope wheel 1 through a rotating shaft;
the elastic member comprises a first elastic structure 23 and a second elastic structure 24;
one end of the first elastic structure 23 is movably connected with a point b1 at the tail part of the first centrifugal motion structure 21, the other end of the first elastic structure 23 is movably connected with a point c1 at the lower side of the rope wheel 1, and the first elastic structure 23 is used for adjusting the pressure applied to the point b1 at the tail part of the first centrifugal motion structure 21; the first centrifugal motion structure 21 makes centrifugal motion along with the rotation of the rope wheel 1; when the rotating speed of the rope pulley 1 reaches a certain speed, the centrifugal force generated on the first centrifugal motion structure 21 is greater than the pressure applied by the first elastic structure 23, so that the first centrifugal motion structure 21 rotates towards the outer contour of the rope pulley 1 by taking the point a1 as a fulcrum to hit the switch connecting rod 100 or the lock hook 101.
One end of the second elastic structure 24 is movably connected with a point b2 at the tail part of the second centrifugal motion structure 22, the other end of the second elastic structure is movably connected with a point c2 at the upper side of the rope wheel 1, and the second elastic structure 24 is used for adjusting the pressure applied to the point b2 at the tail part of the second centrifugal motion structure 22; the second centrifugal motion structure 22 performs centrifugal motion along with the rotation of the rope pulley 1; the working principle of the second centrifugal kinematic structure 22 and the second elastic structure 24 is the same as that of the first centrifugal kinematic structure 21 and the first elastic structure 23, and the description thereof is omitted.
The first centrifugal motion structure 21 and the first elastic structure 23 form a first rated speed detection assembly, the second centrifugal motion structure 22 and the second elastic structure 24 form a second rated speed detection assembly, and the two rated speed detection assemblies are arranged in the rope pulley 1 in a mirror image mode by taking the circle center of the rope pulley 1 as the midpoint; the first elastic structure 23 is used for adjusting the pressure applied to the end of the first centrifugal motion structure 21, so that when the first rated speed is exceeded, the centrifugal force generated by the first centrifugal motion structure 21 can enable the first centrifugal motion structure 21 to strike the switch connecting rod 100, and when the first rated speed is further exceeded, the centrifugal force generated by the first centrifugal motion structure 21 can enable the first centrifugal motion structure 21 to strike the latch hook 101, so that the first rated speed detected by the first rated speed detection component can be adjusted by adjusting the first elastic structure 23, and the pretightening force of the spring is usually adjusted by a nut; similarly, the second rated speed detected by the second rated speed detecting assembly can be adjusted by adjusting the pressure applied to the end of the second centrifugal moving structure 22 through the second elastic structure 24, and the second rated speed is greater than the first rated speed.
In this embodiment, the extension piece 311 is only disposed on the side of the first centrifugal movement structure 21, the extension piece 311 is not disposed on the second centrifugal movement structure 22, and the iron core 31 and the coil 32 constitute an electromagnet, so when the elevator controller controls the coil 32 to be powered on, the iron core 31 generates a magnetic force, so as to adsorb the extension piece 311 made of metal iron, and under the condition that one end of the first centrifugal movement structure 21 has a pressure, a magnetic force is further added, so as to limit the first centrifugal movement structure 21, and the resultant force generated by the magnetic force and the pulling force is greater than the centrifugal force generated on the first centrifugal movement structure 21 when the car reaches the second rated speed, so that the first centrifugal movement structure 21 can be kept in a stationary state all the time and cannot rotate.
Based on the embodiment, when the coil 32 is electrified, the first centrifugal motion structure 21 is limited to act, the second centrifugal motion structure 22 can move normally, and when the speed of the car exceeds a second rated speed, the second centrifugal motion structure 22 can hit the switch connecting rod 100 or the latch hook 101 to stop the car, so that the rated speed detection mechanism only detects the second rated speed when the coil 32 is electrified; when the coil 32 loses power, the first centrifugal motion structure 21 can normally move, when the first rated speed is exceeded, the first centrifugal motion structure 21 can strike the switch connecting rod 100 or the lock hook 101 to stop the car, the speed of the car cannot be increased to the second rated speed, and therefore the rated speed detection mechanism only detects the first rated speed when the coil 32 loses power.
In another embodiment of this embodiment, the stopping mechanism 3 may also be an electric push rod electrically connected to the elevator controller, a fixed end of the electric push rod is fixed on the sheave 1 through a bracket, and the electric push rod is located between one end of the first centrifugal moving structure 21 away from the first elastic structure 23 and the inner wall of the sheave 1, and a telescopic end of the electric push rod faces the first centrifugal moving structure 21; when the elevator controller controls the electric push rod to operate, the telescopic end of the electric push rod extends out of the position between the first centrifugal motion structure 21 and the rope pulley 1, so that the first centrifugal motion structure 21 is limited to rotate continuously and hit the switch connecting rod 100 or the lock hook 101; in this embodiment, it is also possible to control the rated speed detecting means to detect two rated speeds.
As a preferred embodiment of the present embodiment, an RC series circuit is connected in parallel to two ends of the coil 32. When the elevator car is required to be switched from the high-speed second rated speed to the first rated speed, the speed of the elevator car cannot be changed from the second rated speed to the first rated speed immediately, so if the elevator car is still operated at a speed higher than the first rated speed when the rated speed is switched, the first rated speed detection assembly can be subjected to false detection.
Example two:
referring specifically to fig. 4, the present embodiment is different from the first embodiment in that the centrifugal moving part includes a pair of third centrifugal moving structures 25 and a linkage rod 26; the two third centrifugal motion structures 25 are arranged in the rope wheel 1 in a mirror image mode by taking the circle center of the rope wheel 1 as the midpoint, two ends of the linkage rod 26 are respectively connected with the two third centrifugal motion structures 25, and the two third centrifugal motion structures 25 synchronously move through the linkage rod 26;
the elastic member comprises a third elastic structure 27; one end of the third elastic structure 27 is movably connected with one end of one of the third centrifugal motion structures 25, the other end of the third elastic structure 27 is movably connected to the rope pulley 1, and the third elastic structure 27 is used for adjusting the pressure applied to the end of the corresponding third centrifugal motion structure 25;
when the stop mechanism 3 is not in motion, the two third centrifugal motion structures 25 and the third elastic structure 27 form a first rated speed detection assembly for detecting a first rated speed;
when the stopping mechanism 3 acts, a control force is applied to the two third centrifugal motion structures 25 or one of the third centrifugal motion structures 25, and the two third centrifugal motion structures 25 and the third elastic structure 27 form a second rated speed detection assembly for detecting a second rated speed; the second rated speed is greater than the first rated speed.
In the present embodiment, the stopper mechanism 3 also uses the iron core 31, the extending piece 311 and the coil 32, and the difference from the first embodiment is that the extending piece 311 may be provided on the side surface of one of the third centrifugal movement structures 25, the extending piece 311 may be provided on the side surface of the other third centrifugal movement structure 25, or the extending pieces 311 may be provided on the side surfaces of both the third centrifugal movement structures 25.
Based on this embodiment, because the two third centrifugal motion structures 25 are managed by the linkage rod 26 and move synchronously, the two third centrifugal motion structures 25 are restricted from operating, and the voltage across the coil 32 or the area of the extension piece 311 on the side of any one of the third centrifugal motion structures 25 extending to the outline of the iron core 31 is preset, so that when only the third elastic structure 27 applies pressure to the third centrifugal motion structure 25, the third centrifugal motion structure 25 will hit the switch link 100 or the latch hook 101 to stop the car when the first rated speed is exceeded; if the coil 32 is powered on, so that the iron core 31 generates a certain magnetic force on the extension piece 311 and the third elastic structure 27 applies pressure on the third centrifugal motion structure 25 at the same time, when the second rated speed is exceeded, the third centrifugal motion structure 25 will hit the switch link 100 or the latch hook 101 to stop the car; therefore, when the coil 32 is power-off, the rated speed detection mechanism only detects the first rated speed; when the coil 32 is energized, the rated speed detecting means detects only the second rated speed.
Based on the first embodiment and the second embodiment, the invention can also realize that more rated speed detection mechanisms are arranged to be matched with an elevator system with more rated speeds, such as three rated speeds and four rated speeds, only the rated speed detection mechanism needs to be additionally arranged according to the principle explained in the embodiment, and further, a speed limiting device with two-way rated speeds can be realized.
Example three:
the embodiment provides an elevator speed-up method, which is realized based on an elevator speed limiting device capable of switching two rated speeds at any time, and the method comprises the following steps:
dividing top and bottom regions of a hoistway into first rated speed regions;
when the elevator goes upwards, detecting whether the weight of the lift car is less than or equal to the weight of the balancing weight; when the weight of the lift car is less than or equal to the weight of the counterweight block, the elevator controller controls to send an instruction to the stopping mechanism 3, so that the stopping mechanism 3 is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator ascends to a first rated speed area at the top of the shaft, the elevator controller controls to send a command to the stopping mechanism 3, so that the stopping mechanism 3 is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed;
when the elevator descends, detecting whether the weight of the lift car is more than or equal to the weight of the balancing weight; when the weight of the lift car is more than or equal to the weight of the counterweight block, the elevator controller controls to send an instruction to the stopping mechanism 3, so that the stopping mechanism 3 is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator descends to a first rated speed area at the bottom of the shaft, the elevator controller controls to send a command to the stopping mechanism 3, so that the stopping mechanism 3 is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed.
In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. An elevator speed limiting device capable of switching two rated speeds at any time is characterized by comprising:
a rated speed detection mechanism and a stop mechanism (3) which are arranged on the rope wheel (1);
the rated speed detection mechanism comprises a centrifugal motion part and an elastic part, wherein the centrifugal motion part and the elastic part are rotationally connected with the rope wheel (1) through a rotating shaft, the centrifugal motion part performs centrifugal motion along with the rotation of the rope wheel (1), one end of the elastic part is movably connected with one end of the centrifugal motion part, the other end of the elastic part is movably connected to the rope wheel (1), the elastic part is used for adjusting pressure applied to the centrifugal motion part, and the pressure is opposite to the centrifugal force generated by the centrifugal motion part performing centrifugal motion;
the stopping mechanism (3) is arranged on a support of the rope pulley (1) and is electrically connected with an elevator controller, and the stopping mechanism (3) acts according to an instruction sent by the elevator controller and is used for limiting the movement of the centrifugal moving part;
when the stopping mechanism (3) is actuated, the rated speed detection mechanism is used for detecting the rated speed of one type of elevator car operation, and when the stopping mechanism (3) is not actuated, the rated speed detection mechanism is used for detecting the rated speed of the other type of elevator car operation.
2. The elevator speed limiting device capable of switching two rated speeds at any time according to claim 1, characterized in that:
the stop mechanism (3) comprises an iron core (31), an extension piece (311) and a coil (32);
the iron core (31) is arranged on a rotating shaft of the rope pulley (1) and rotates along with the rope pulley (1);
the coil (32) is fixed in front of the rope wheel (1) through a bracket of the rope wheel (1) and sleeved outside the iron core (31);
the coil (32) is electrically connected with an elevator controller, and the coil (32) is controlled to be powered on or powered off by the elevator controller;
the main part of centrifugal motion part do not with iron core (31) interfere, be provided with extension piece (311) that a metal iron made on the centrifugal motion part, extension piece (311) one end and centrifugal motion part fixed connection, the other end extends to iron core (31) towards the terminal surface within range of rope sheave (1) with iron core (31) cooperation is inhaled and is released.
3. The elevator speed limiting device capable of switching two rated speeds at any time according to claim 2, characterized in that:
and two ends of the coil (32) are connected with an RC series circuit in parallel.
4. The elevator speed limiting device capable of switching two rated speeds at any time according to claim 1, characterized in that:
the centrifugal motion part comprises a first centrifugal motion structure (21) and a second centrifugal motion structure (22);
the elastic component comprises a first elastic structure (23) and a second elastic structure (24);
one end of the first elastic structure (23) is movably connected with one end of the first centrifugal motion structure (21), the other end of the first elastic structure is movably connected to the rope wheel (1), and the first elastic structure (23) is used for adjusting the pressure applied to the end part of the first centrifugal motion structure (21); the first centrifugal motion structure (21) performs centrifugal motion along with the rotation of the rope wheel (1);
one end of the second elastic structure (24) is movably connected with one end of the second centrifugal motion structure (22), the other end of the second elastic structure is movably connected to the rope wheel (1), and the second elastic structure (24) is used for adjusting the pressure applied to the end part of the second centrifugal motion structure (22); the second centrifugal motion structure (22) performs centrifugal motion along with the rotation of the rope wheel (1);
the first centrifugal motion structure (21) and the first elastic structure (23) form a first rated speed detection assembly, the second centrifugal motion structure (22) and the second elastic structure (24) form a second rated speed detection assembly, and the two rated speed detection assemblies are arranged in the rope pulley (1) in a mirror image mode by taking the circle center of the rope pulley (1) as the midpoint;
the first rated speed detection assembly is used for detecting the first rated speed by adjusting the first elastic structure (23), and the second rated speed detection assembly is used for detecting the second rated speed by adjusting the second elastic structure (24), wherein the second rated speed is greater than the first rated speed;
when the stopping mechanism (3) acts, a control force is applied to the first centrifugal motion structure (21), and the resultant force of the control force and the pressure applied to the end part of the first centrifugal motion structure (21) by the first elastic structure (23) is larger than the centrifugal force generated on the first centrifugal motion structure (21) when the rope pulley (1) reaches the second rated speed.
5. The elevator speed limiting device capable of switching two rated speeds at any time according to claim 1, characterized in that:
the centrifugal motion part comprises a pair of third centrifugal motion structures (25) and a linkage rod (26); the two third centrifugal motion structures (25) are arranged in the rope wheel (1) in a mirror image mode by taking the circle center of the rope wheel (1) as the midpoint, two ends of the linkage rod (26) are respectively connected with the two third centrifugal motion structures (25), and the two third centrifugal motion structures (25) synchronously move through the linkage rod (26);
the elastic component comprises a third elastic structure (27); one end of the third elastic structure (27) is movably connected with one end of one third centrifugal motion structure (25), the other end of the third elastic structure is movably connected to the rope wheel (1), and the third elastic structure (27) is used for adjusting the pressure applied to the end part of the corresponding third centrifugal motion structure (25);
when the stop mechanism (3) does not act, the two third centrifugal motion structures (25) and the third elastic structure (27) form a first rated speed detection assembly for detecting a first rated speed;
when the stopping mechanism (3) acts, control force is applied to the two third centrifugal motion structures (25) or one of the third centrifugal motion structures (25), and the two third centrifugal motion structures (25) and the third elastic force structure (27) form a second rated speed detection assembly for detecting a second rated speed; the second rated speed is greater than the first rated speed.
6. An elevator speed-increasing method is realized on the basis of the elevator speed limiting device capable of switching two rated speeds at any time according to any one of claims 1 to 5, and is characterized by comprising the following steps:
dividing top and bottom regions of a hoistway into first rated speed regions;
when the elevator goes upwards, detecting whether the weight of the lift car is less than or equal to the weight of the balancing weight; when the weight of the lift car is less than or equal to the weight of the balancing weight, the elevator controller controls to send a command to the stopping mechanism (3), so that the stopping mechanism (3) is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator ascends to a first rated speed area at the top of the shaft, the elevator controller controls to send a command to the stopping mechanism (3), so that the stopping mechanism (3) is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed;
when the elevator descends, detecting whether the weight of the lift car is more than or equal to the weight of the balancing weight; when the weight of the lift car is more than or equal to the weight of the counterweight block, the elevator controller controls to send an instruction to the stopping mechanism (3), so that the stopping mechanism (3) is switched to detect a second rated speed, and meanwhile, the elevator controller controls the lift car to run at the second rated speed; when the elevator descends to a first rated speed area at the bottom of the shaft, the elevator controller controls to send a command to the stopping mechanism (3), so that the stopping mechanism (3) is switched to detect the first rated speed, and meanwhile, the elevator controller controls the elevator car to run at the first rated speed.
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| CN202211269325.0A CN115893146B (en) | 2022-10-17 | 2022-10-17 | Elevator speed limiting device capable of switching two rated speeds at any time and elevator speed increasing method |
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| CN115893146B (en) | 2024-07-09 |
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