Elevator with speed limiter self-checking function

Abstract

This utility model provides an elevator with a speed governor self-test function, including an elevator car, a counterweight, a speed governor system, and a traction system located in the hoistway. The speed governor system includes a speed governor wire rope, a speed governor, a tensioning device, and a safety clamp lifting device. The speed governor wire rope is wound around the speed governor and the tensioning device. The safety clamp lifting device is connected to the speed governor wire rope and is located on the top of the elevator car. The traction system includes a traction machine, a traction wire rope, a car top pulley assembly, and a counterweight pulley assembly. The car pulley assembly is located on the top of the elevator car, and the counterweight pulley assembly is located on top of the elevator counterweight. A weighing device is also included, fixedly located on the top of the hoistway. One end of the traction wire rope is connected to the weighing device, and the other end of the traction wire rope passes sequentially around the car top pulley assembly, the traction machine, and the counterweight pulley assembly before being fixedly located on the top of the hoistway. This utility model can detect whether the speed governor's lifting force meets national standards.

Description

Technical Field

[0001] This utility model belongs to the field of elevator technology, and in particular relates to an elevator with a speed limiter self-checking function. Background Technology

[0002] When the elevator speed governor is activated, the lifting force of the speed governor rope should not be less than the greater of the following two values: twice the force required to activate the safety clamp, or 300N. The elevator motor room environment is complex, the speed governor is not protected, and the performance of the speed governor is difficult to guarantee. Although the speed governor's operating speed is checked regularly, it is impossible to assess whether the speed governor has sufficient lifting force. Utility Model Content

[0003] The purpose of this utility model is to provide an elevator with a speed governor self-test function, which can detect whether the speed governor lifting force meets the national standard requirements.

[0004] This utility model is achieved through the following technical solution:

[0005] An elevator with a speed governor self-checking function includes an elevator car, an elevator counterweight, a speed limiting system, and a traction system located in the hoistway. The speed limiting system includes a speed limiting wire rope, a speed governor, a tensioning device, and a safety clamp lifting device. The speed limiting wire rope is wound around the speed governor and the tensioning device. The safety clamp lifting device is connected to the speed limiting wire rope and is located on the top of the elevator car. The traction system includes a traction machine, a traction wire rope, a car top sheave assembly, and a counterweight sheave assembly. The car sheave assembly is located on the top of the elevator car, and the counterweight sheave assembly is located on top of the elevator counterweight. The system also includes a weighing device, which is fixedly located on the top of the hoistway. One end of the traction wire rope is connected to the weighing device, and the other end of the traction wire rope passes sequentially around the car top sheave assembly, the traction machine, and the counterweight sheave assembly before being fixedly located on the top of the hoistway.

[0006] Furthermore, it also includes a safety clamp locking device, which is configured to lock the safety clamp lifting device so that the safety clamp lifting device cannot trigger the safety clamp action.

[0007] Furthermore, the safety clamp lifting device includes a safety clamp lifting rod and a safety clamp connecting rod connected to the safety clamp lifting rod. The safety clamp lifting rod is connected to the speed limiting wire rope, and the safety clamp connecting rod is located at the top of the elevator car. The safety clamp locking device includes a push rod and a drive mechanism. The drive mechanism is located at the top of the elevator car and is connected to the push rod, used to move the push rod above the safety clamp lifting rod.

[0008] Furthermore, the drive mechanism includes a hydraulic cylinder, the piston rod of which is connected to a push rod.

[0009] Furthermore, the drive mechanism is mounted on the top of the elevator car via a fixed rod.

[0010] Furthermore, the safety clamp locking device also includes a sensor for sensing whether the push rod has moved above the safety clamp lifting rod.

[0011] Furthermore, the push rod is a metal rod, and the sensor is a metal induction sensor.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the lifting force of the speed governor can be detected when the elevator is idle to determine whether the lifting force of the speed governor meets the national standard requirements, and to prevent the speed governor from failing to lift the safety clamp when it is activated. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an elevator with a speed limiter self-test function according to this utility model;

[0014] Figure 2 This is a top view of the elevator safety clamp locking device and safety clamp lifting device with speed governor self-test function according to this utility model;

[0015] Figure 3 This is a plan view of the elevator safety clamp locking device and safety clamp lifting device with speed governor self-test function according to this utility model.

[0016] In the diagram, 1-elevator car, 2-elevator counterweight, 3-speed limiting system, 31-speed limiting wire rope, 32-speed governor, 33-tensioning device, 4-traction system, 41-traction machine, 42-traction wire rope, 43-car top pulley assembly, 44-counterweight pulley assembly, 5-safety clamp lifting device, 51-safety clamp lifting rod, 52-safety clamp connecting rod, 6-safety clamp locking device, 61-push rod, 62-drive mechanism, 63-fixed rod, 64-sensor, 7-weighing device. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Please see Figures 1 to 3 , Figure 1 This is a structural diagram of an elevator with a speed governor self-checking function according to this utility model. Figure 2 This is a top view of the elevator safety clamp locking device and safety clamp lifting device with speed governor self-test function according to this utility model. Figure 3This is a plan view of the safety clamp locking device and safety clamp lifting device in an elevator with a speed governor self-checking function according to this utility model. An elevator with a speed governor self-checking function includes an elevator car 1 located in the shaft, an elevator counterweight 2, a speed limiting system 3, and a traction system 4. The speed limiting system 3 includes a speed limiting wire rope 31, a speed governor 32, a tensioning device 33, and a safety clamp lifting device 5. The speed limiting wire rope 31 is wound around the speed governor 32 and the tensioning device 33. The safety clamp lifting device 5 is connected to the speed limiting wire rope 31 and is installed on the top of the elevator car 1. The traction system 4 includes a traction machine 41 and a traction steel... The elevator includes a wire rope 42, a car top wheel assembly 43, and a counterweight wheel assembly 44. The car wheel assembly is located on the top of the elevator car 1, and the counterweight wheel assembly 44 is located on the top of the elevator counterweight 2. This utility model elevator with a speed governor self-test function also includes a weighing device 7, which is fixedly installed on the top of the shaft. One end of the traction wire rope 42 is connected to the weighing device 7, and the other end of the traction wire rope 42 passes through the car top wheel assembly 43, the traction machine 41, and the counterweight wheel assembly 44 in sequence before being fixedly installed on the top of the shaft.

[0023] This utility model of an elevator with a speed governor self-test function adds a weighing device 7 to the existing elevator. It can detect the lifting force of the speed governor when the elevator is idle. The weight of the elevator car 1 is measured by the weighing device 7. The change in weight of the elevator car 1 during operation is used to determine whether the lifting force of the speed governor 32 is normal, so as to determine whether the lifting force of the speed governor 32 meets the national standard requirements and prevent the speed governor 32 from failing to lift the safety clamp when it is activated.

[0024] The safety clamp lifting device 5 is used to connect the speed-limiting wire rope 31 and the safety clamp. To avoid affecting the speed governor's lifting force detection, in one embodiment, the elevator with the speed governor's self-test function also includes a safety clamp locking device 6. The safety clamp locking device 6 is configured to lock the safety clamp lifting device 5, preventing the safety clamp lifting device 5 from triggering the safety clamp action. By locking the safety clamp lifting device 5 with the safety clamp locking device 6, the safety clamp lifting device 5 is prevented from triggering the safety clamp action, thereby prohibiting the safety clamp action and preventing the elevator car 1 from being unable to descend further, thus affecting the speed governor 32's lifting force detection.

[0025] In one embodiment, the safety clamp lifting device 5 includes a safety clamp lifting rod 51 and a safety clamp connecting rod 52 connected to the safety clamp lifting rod 51. The safety clamp lifting rod 51 is connected to the speed-limiting wire rope 31, and the safety clamp connecting rod 52 is disposed on the top of the elevator car 1. The safety clamp locking device 6 includes a push rod 61 and a drive mechanism 62. The drive mechanism 62 is disposed on the top of the elevator car 1 and connected to the push rod 61, and is used to move the push rod 61 above the safety clamp lifting rod 51. The safety clamp lifting rod 51 and the safety clamp connecting rod 52 are existing structures and will not be described in detail here. Based on the existing safety clamp lifting device 5, a safety clamp locking device is added. The drive mechanism 62 moves the push rod 61 above the safety clamp lifting rod 51, restricting its upward movement. This prevents the safety clamp lifting rod 51 from being lifted by the speed-limiting wire rope 31, thus preventing the safety clamp from moving and preventing the elevator car 1 from descending further, which would affect the speed limiter 32's lifting force detection. In one embodiment, the drive mechanism 62 includes a hydraulic cylinder, with its piston rod connected to the push rod 61. Activating the hydraulic cylinder causes the piston rod to extend away from the cylinder body, thereby moving the push rod 61 above the safety clamp lifting rod 51. Alternatively, the piston rod may retract towards the cylinder body, moving the push rod 61 to the outside of the safety clamp lifting rod 51, preventing interference with the speed-limiting wire rope 31's lifting of the safety clamp lifting rod 51.

[0026] In one embodiment, the drive mechanism 62 is mounted on the top of the elevator car 1 via a fixing rod 63. The length of the fixing rod 63 can be determined based on the distance of the safety clamp lifting rod 51 relative to the top of the elevator car 1, ensuring that the push rod 61 is positioned above and in contact with the safety clamp lifting rod 51.

[0027] In one embodiment, the safety clamp locking device 6 further includes a sensor 64 for sensing whether the push rod 61 has moved above the safety clamp lifting rod 51. The sensor 64 is connected to the elevator control system. When the elevator control system receives information from the sensor 64 and determines that the safety clamp lifting device 5 is in a locked state and the safety clamp cannot move, the elevator control system enters the detection mode for detecting the lifting force of the speed governor 32. In one embodiment, the push rod 61 is a metal rod, and the sensor 64 is a metal induction sensor. When the push rod 61 moves above the safety clamp lifting rod 51, the metal induction sensor senses the push rod 61 and sends sensing information to the elevator control system.

[0028] In one embodiment, the end of the traction wire rope 42 furthest from the weighing device 7 is fixed to the top of the shaft via a rope end plate. This arrangement facilitates securing one end of the traction wire rope 42 to the top of the shaft.

[0029] The following is a brief description of the testing process for the elevator with the speed governor self-test function of this utility model:

[0030] The weight m1 of the elevator car 1 is measured by the weighing device 7. Then, the elevator control system controls the electromagnetic switch of the speed governor 32 to enter the triggered state and short-circuit the speed governor's action switch. At the same time, it controls the drive mechanism 62 to move the push rod 61 above the safety clamp lifting rod 51 to prevent the safety clamp lifting rod 51 from being pulled up, and the safety clamp lifting device 5 enters the locked state. After the sensor 64 senses the push rod 61, it sends sensing information to the elevator control system. After receiving the sensing information and the information that the speed governor 32 has entered the triggered state, the elevator control system enters the detection mode.

[0031] The elevator travels downwards at a low speed, such as 0.3 m / s. The elevator car 1 is pulled downwards by the safety clamp lifting device 5, which pulls the speed-limiting steel wire rope 31. The weighing device 7 continuously measures the weight m2 of the elevator car 1. If the difference between m1 and m2 is greater than the set value for 5 seconds, it indicates that the lifting force is normal; otherwise, it is abnormal.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An elevator with a speed governor self-checking function, comprising an elevator car, an elevator counterweight, a speed limiting system, and a traction system located within a shaft, wherein the speed limiting system includes a speed limiting wire rope, a speed governor, a tensioning device, and a safety clamp lifting device; the speed limiting wire rope is wound around the speed governor and the tensioning device; the safety clamp lifting device is connected to the speed limiting wire rope and is disposed on the top of the elevator car; the traction system includes a traction machine, a traction wire rope, a car top pulley assembly, and a counterweight pulley assembly; the car pulley assembly is disposed on the top of the elevator car, and the counterweight pulley assembly is disposed on the top of the elevator counterweight, characterized in that... It also includes a weighing device, which is fixedly installed at the top of the shaft. One end of the traction steel wire rope is connected to the weighing device, and the other end of the traction steel wire rope passes through the car top wheel assembly, the traction machine and the counterweight wheel assembly in sequence before being fixedly installed at the top of the shaft.

2. The elevator with speed governor self-test function according to claim 1, characterized in that, It also includes a safety clamp locking device, which is configured to lock the safety clamp lifting device so that the safety clamp lifting device cannot trigger the safety clamp action.

3. The elevator with speed governor self-test function according to claim 2, characterized in that, The safety clamp lifting device includes a safety clamp lifting rod and a safety clamp connecting rod connected to the safety clamp lifting rod. The safety clamp lifting rod is connected to the speed limiting wire rope. The safety clamp connecting rod is located on the top of the elevator car. The safety clamp locking device includes a push rod and a drive mechanism. The drive mechanism is located on the top of the elevator car and connected to the push rod, and is used to move the push rod above the safety clamp lifting rod.

4. The elevator with speed governor self-test function according to claim 3, characterized in that, The drive mechanism includes a hydraulic cylinder, and the piston rod of the hydraulic cylinder is connected to a push rod.

5. The elevator with speed governor self-test function according to claim 3, characterized in that, The drive mechanism is mounted on the top of the elevator car via a fixed rod.

6. The elevator with speed governor self-test function according to claim 3, characterized in that, The safety clamp locking device also includes a sensor for sensing whether the push rod has moved above the safety clamp lifting rod.

7. The elevator with speed governor self-test function according to claim 6, characterized in that, The push rod is a metal rod, and the sensor is a metal induction sensor.

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