Auxiliary control device of elevator safety tongs

Abstract

The utility model discloses an auxiliary control device of elevator safety tongs, which belongs to the technical field of elevator safety and comprises a safety tongs box, and an auxiliary brake mechanism is mounted in the safety tongs box. By arranging the auxiliary braking mechanism, the emergency braking and stopping effect of the elevator is improved, in the normal operation process of the elevator, the speed sensor monitors the speed of the elevator in real time and transmits data to the central controller, the speed governor sensor monitors the state of the speed governor at the same time, it is guaranteed that the speed governor can work normally when needed, and the safety of the elevator is guaranteed. When the speed of the elevator exceeds a set value, after the central controller judges that an abnormal condition exists, an auxiliary braking structure is started immediately, that is, after an air cylinder telescopic rod receives a control signal, a limiting clamping block is contracted, limiting on a sliding block is canceled, the weight of the elevator drives a steel wire rope to be lifted upwards, and an auxiliary wedge block moves upwards; the distance between the auxiliary wedge block and the main wedge block is gradually shortened, and the clamping force on the steel wire rope is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, and more specifically, to an auxiliary control device for an elevator safety tongs. Background Art

[0002] The safety tongs are safety components in an elevator, and its control device is a speed limiter. When the running speed of the elevator car exceeds the rated speed, the mechanical device inside the speed limiter acts to clamp the speed limiting rope. The speed limiting rope pulls the moving wedge block of the safety tongs through a lever mechanism to stop the elevator.

[0003] After retrieval, the existing patent (application number: CN 105398908 A) discloses an auxiliary control device for an elevator safety tongs. Without changing the structure of the existing speed limiter, an additional control device for the safety tongs is added to make the elevator operation safer. The present invention includes a car motion parameter detection device, a traction wheel motion parameter detection device, a pneumatic system and a controller. The car motion parameter detection device, the pneumatic system and the controller are all fixedly connected to the car frame and move synchronously with the car. When the car slips or the rated speed exceeds the set value, the data processor in the controller automatically starts the solenoid valve through the execution circuit, so that the high-pressure gas in the air storage tank flows to the cylinder, and the cylinder telescopic rod moves upward to push the safety tongs lever mechanism, driving the moving wedge block of the safety tongs to move upward to achieve elevator stopping. The inventor found the following problems in the process of realizing the present utility model:

[0004] The functionality of such devices is poor, and the braking and stopping effect on the elevator is not good. After detecting an abnormal situation, it is necessary to go through multiple links to start the braking mechanism, and there may be a delay in this process, affecting the timeliness of emergency braking and the braking effect and safety performance of the elevator in an emergency.

[0005] Therefore, an auxiliary control device for an elevator safety tongs is proposed for the above problems. Content of the Utility Model

[0006] In order to overcome the above defects of the prior art, the present utility model provides an auxiliary control device for an elevator safety tongs to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: an auxiliary control device for an elevator safety tongs, including a safety tongs box, and an auxiliary braking mechanism is installed inside the safety tongs box;

[0008] On one side inside the safety tongs box, a first support block is fixedly installed. A fixing bolt is fixedly installed on the outside of the first support block. A main wedge block is fixedly installed on the outside of the fixing bolt. An auxiliary spring is fixedly installed at the bottom of the main wedge block. A spring column is fixedly installed on one side of the first support block. On the other side inside the safety tongs box, a second support block is fixedly installed. A fastening bolt is fixedly installed on the outside of the second support block. A sub-wedge block is nested and installed on the outside of the second support block. A chute is embedded and installed inside the second support block. A slider is embedded and installed inside the chute. A limit clamping block is closely attached to the outside of the slider. A cylinder telescopic rod is nested and installed on one side of the limit clamping block. A buffer spring is fixedly installed at the top of the sub-wedge block. A toothed block is fixedly installed on one side of the sub-wedge block. A speed limiter sensor is installed inside the safety tongs box. A speed sensor is arranged on one side of the speed limiter sensor. A central controller is arranged on one side of the speed sensor. An alarm buzzer is arranged on one side of the central controller.

[0009] Further, a connecting block is fixedly installed on the top of the safety tongs box.

[0010] Further, the first support block and the second support block are distributed on both sides inside the safety tongs box.

[0011] Further, the main wedge block and the sub-wedge block are used in cooperation.

[0012] Further, the sub-wedge block moves inside the chute.

[0013] Further, the limit clamping block and the slider are used in cooperation.

[0014] Further, multiple toothed blocks are provided and are evenly distributed on the outside of the main wedge block and the sub-wedge block.

[0015] Further, two connecting blocks are provided in total and are fixed to the top of the safety tongs box.

[0016] The technical effects and advantages of the present utility model:

[0017] 1. Compared with the prior art, the auxiliary control device of this elevator safety tong improves the emergency braking stop effect of the elevator by setting an auxiliary braking mechanism. When the elevator is running normally, the elevator speed is monitored in real time by a speed sensor, and the data is transmitted to the central controller. The speed limiter sensor simultaneously monitors the state of the speed limiter to ensure its normal operation when needed. When the elevator speed exceeds the set value, the speed sensor sends an abnormal signal to the central controller. After the central controller determines it as an abnormal situation, it immediately activates the auxiliary braking structure, that is, after the cylinder telescopic rod receives the control signal, it contracts the limit clamping block, canceling the limit on the slider, then the auxiliary wedge block slides upward along with the elevator steel wire rope, quickly clamping the elevator steel wire rope to achieve emergency braking. During the braking process, the alarm buzzer emits an alarm sound to remind relevant personnel to pay attention. At the same time, due to the weight of the elevator, the steel wire rope is lifted upward, driving the auxiliary wedge block to move upward, gradually shortening the distance between the auxiliary wedge block and the main wedge block, and increasing the clamping force on the steel wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the whole of the present utility model.

[0019] Figure 2 It is a schematic internal structure diagram of the auxiliary wedge block of the whole of the present utility model.

[0020] Figure 3 For the whole of the present utility model Figure 1 The enlarged structural schematic diagram at A.

[0021] Figure 4 It is a schematic structural diagram of the safety tong trigger braking process of the whole of the present utility model.

[0022] The reference numerals are: 1, safety tong box; 2, auxiliary braking mechanism; 3, first support block; 4, fixing bolt; 5, main wedge block; 6, auxiliary spring; 7, spring column; 8, second support block; 9, fastening bolt; 10, auxiliary wedge block; 11, chute; 12, slider; 13, limit clamping block; 14, cylinder telescopic rod; 15, buffer spring; 16, toothed block; 17, speed limiter sensor; 18, speed sensor; 19, central controller; 20, alarm buzzer; 21, connecting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1

[0025] As shown in the attached Figures 1-4 An auxiliary control device for an elevator safety tongs, including a safety tongs box 1, and an auxiliary braking mechanism 2 is installed inside the safety tongs box 1; a first support block 3 is fixedly installed on one side inside the safety tongs box 1, a fixing bolt 4 is fixedly installed outside the first support block 3, a main wedge block 5 is fixedly installed outside the fixing bolt 4, an auxiliary spring 6 is fixedly installed at the bottom of the main wedge block 5, a spring column 7 is fixedly installed on one side of the first support block 3, a second support block 8 is fixedly installed on the other side inside the safety tongs box 1, a fastening bolt 9 is fixedly installed outside the second support block 8, a sub-wedge block 10 is nested outside the second support block 8, a chute 11 is embedded inside the second support block 8, a slider 12 is embedded inside the chute 11, a limit clamping block 13 is closely attached to the outside of the slider 12, a cylinder telescopic rod 14 is nested on one side of the limit clamping block 13, a buffer spring 15 is fixedly installed at the top of the sub-wedge block 10, a toothed block 16 is fixedly installed on one side of the sub-wedge block 10, a speed limiter sensor 17 is installed inside the safety tongs box 1, a speed sensor 18 is arranged on one side of the speed limiter sensor 17, a central controller 19 is arranged on one side of the speed sensor 18, and an alarm buzzer 20 is arranged on one side of the central controller 19.

[0026] Among them: When the elevator is running normally, the speed sensor 18 monitors the elevator speed in real time and transmits the data to the central controller 19. The speed limiter sensor 17 monitors the state of the speed limiter at the same time to ensure that it can work normally when needed. When the elevator speed exceeds the set value, the speed sensor 18 sends an abnormal signal to the central controller 19. After the central controller 19 determines it as an abnormal situation, it immediately activates the auxiliary braking structure, that is, after the cylinder telescopic rod 14 receives the control signal, it contracts the limit clamping block 13, so that the limit on the slider 12 is cancelled, then the sub-wedge block 10 slides upward along with the elevator steel wire rope and quickly clamps the elevator steel wire rope to achieve emergency braking. During the braking process, the alarm buzzer 20 emits an alarm sound to remind relevant personnel to pay attention. At the same time, due to the weight of the elevator, the steel wire rope is lifted upward, and at the same time drives the sub-wedge block 10 to move upward, so that the distance between the sub-wedge block 10 and the main wedge block 5 gradually shortens, improving the clamping force on the steel wire rope, thereby improving the braking stop effect on the elevator.

[0027] Embodiment 2

[0028] On the basis of Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working methods. For details, see the following description:

[0029] As Figure 1As shown, as a preferred embodiment; a connecting block 21 is fixedly installed on the top of the safety tong box 1. Further, the connection stability between the safety tong box 1 and the elevator is improved through the connecting block 21.

[0030] The working process of the present utility model is as follows:

[0031] When this auxiliary control device of the elevator safety tong is in use, during the normal operation of the elevator, the speed sensor 18 monitors the elevator speed in real time and transmits the data to the central controller 19. The speed limiter sensor 17 monitors the state of the speed limiter at the same time to ensure that it can work normally when needed. When the elevator speed exceeds the set value, the speed sensor 18 sends an abnormal signal to the central controller 19. After the central controller 19 determines it as an abnormal situation, it immediately activates the auxiliary braking structure, that is, after the cylinder telescopic rod 14 receives the control signal, it contracts the limit clamping block 13, so that the limit on the slider 12 is cancelled, then the auxiliary wedge block 10 slides upward along with the elevator steel wire rope and quickly clamps the elevator steel wire rope to achieve emergency braking. During the braking process, the alarm buzzer 20 emits an alarm sound to remind relevant personnel to pay attention. At the same time, due to the weight of the elevator, the steel wire rope is lifted upward, and at the same time drives the auxiliary wedge block 10 to move upward, so that the distance between the auxiliary wedge block 10 and the main wedge block 5 gradually shortens, improving the clamping force on the steel wire rope, thereby improving the braking stop effect on the elevator. This is the working process and working principle of this device.

[0032] Finally, the following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the described object changes, the relative position relationship may change;

[0033] Second: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0034] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An auxiliary operating device for an elevator safety clamp, comprising a safety clamp box (1), characterized in that: An auxiliary braking mechanism (2) is installed inside the safety clamp box (1); A first support block (3) is fixedly installed on one side of the interior of the safety clamp box (1), a fixing bolt (4) is fixedly installed on the outside of the first support block (3), a main wedge block (5) is fixedly installed on the outside of the fixing bolt (4), an auxiliary spring (6) is fixedly installed on the bottom of the main wedge block (5), a spring column (7) is fixedly installed on one side of the first support block (3), a second support block (8) is fixedly installed on the other side of the interior of the safety clamp box (1), a fastening bolt (9) is fixedly installed on the outside of the second support block (8), a secondary wedge block (10) is nested and installed on the outside of the second support block (8), a slide groove (11) is embedded and installed on the inside of the second support block (8), and the A slider (12) is embedded in the interior of the slide groove (11), and a limit clamping block (13) is tightly fitted on the exterior of the slider (12). A cylinder telescopic rod (14) is nested on one side of the limit clamping block (13). A buffer spring (15) is fixedly installed on the top of the auxiliary wedge block (10), and a toothed block (16) is fixedly installed on one side of the auxiliary wedge block (10). A speed limiter sensor (17) is installed inside the safety clamp box (1), and a speed sensor (18) is arranged on one side of the speed limiter sensor (17). A central controller (19) is arranged on one side of the speed sensor (18), and an alarm buzzer (20) is arranged on one side of the central controller (19).

2. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: A connecting block (21) is fixedly mounted on the top of the safety clamp box (1).

3. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: The first support block (3) and the second support block (8) are distributed on both sides inside the safety clamp box (1).

4. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: The main wedge block (5) and the auxiliary wedge block (10) are used together.

5. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: The auxiliary wedge (10) moves inside the slide groove (11).

6. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: The position limiting clamping block (13) is used in conjunction with the sliding block (12).

7. The auxiliary operating device of an elevator safety clamp according to claim 1, characterized in that: A plurality of toothed blocks (16) are provided and are evenly distributed outside the main wedge block (5) and the auxiliary wedge block (10).

8. The auxiliary operating device of an elevator safety clamp according to claim 2, characterized in that: There are two connecting blocks (21) in total, which are fixed on the top of the safety clamp box (1).

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