CN114955773B

CN114955773B - Debugging equipment and debugging method for progressive safety tongs lifting mechanism of elevator

Info

Publication number: CN114955773B
Application number: CN202210724118.3A
Authority: CN
Inventors: 王威; 林育海; 陈浩; 陈锐彬; 黄冠英
Original assignee: Hitachi Building Technology Guangzhou Co Ltd
Current assignee: Hitachi Building Technology Guangzhou Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-05-26
Anticipated expiration: 2042-06-23
Also published as: CN114955773A

Abstract

The invention belongs to the technical field of elevator equipment debugging and discloses equipment and a debugging method for a lifting mechanism of an elevator progressive safety tongs, wherein a lifting device comprises a first driving piece and a tension detecting piece, the first driving piece is used for applying lifting force so as to enable an active wedge block and a corresponding passive wedge block to clamp a guide rail, and the tension detecting piece is used for detecting the lifting force; the distance measuring device is used for detecting the displacement of the active wedge block; the push-pull device comprises a second driving piece, a push-pull force detection piece and a first displacement detection piece, wherein the second driving piece is used for applying load to the tested car frame, the push-pull force detection piece is used for detecting push-pull force of the second driving piece, and the first displacement detection piece is used for detecting displacement of the tested car frame; the control unit is in communication connection with the first driving piece, the tension detecting piece, the distance measuring device, the second driving piece and the push-pull force detecting piece, so that required data are accurately collected, manual experience interference is reduced, and the debugging accuracy and reliability of the safety tongs lifting rod mechanism are improved.

Description

Debugging equipment and debugging method for progressive safety tongs lifting mechanism of elevator

Technical Field

The invention relates to the technical field of elevator equipment debugging, in particular to equipment and a method for debugging a lifting mechanism of an elevator progressive safety tongs.

Background

The elevator safety gear is an extremely important safety device in an elevator system, and the elevator safety gear and an elevator speed limiter are matched to form a linkage protection device when the elevator overspeed or out of control. In which the elevator governor serves as a means of speed reaction and of operating the safety gear arrangement, and the elevator safety gear is a mechanism for forcibly stopping the elevator on the guide rail with a mechanical action. When the elevator car runs downwards in an accelerating way and exceeds the mechanical action speed of the elevator speed limiter, the speed limiter acts instantly, the speed limiter steel wire rope is clamped, the steel wire rope lifts the lifting rod of the safety tongs device, the wedge block of the elevator safety tongs device is forced to act and clamped on the elevator guide rail, and then the elevator car is forcedly stopped on the elevator guide rail. The connecting rod switch on the safety gear system correspondingly acts when the safety gear wedge block acts, so that the traction machine stops running. It follows that the performance of the elevator safety gear is a determining factor regarding the safety of the elevator operation.

The safety gear braking process is actually the result of the co-operation of the components of the speed limiter, the lifting lever and the safety gear itself. In the safety protection braking system, to ensure the accuracy and reliability of the actions of the safety tongs, the assembling and debugging processes of the lifting and pulling rod mechanism of the safety tongs must be ensured to be accurate and reliable.

The following regulations are set forth in GB7588, safety regulations for elevator manufacture and installation:

1. when the speed limiter acts, the tension of the speed limiter rope is not smaller than the larger of the following two values: a) Twice the force required for the safety gear to function; b) 300N. (Act 9.9.4)

2. The use of the clamping jaw or the clamp body of the safety clamp as a guide shoe is prohibited. (Act 9.8.6.1)

3. Restriction of inclination of car floor: in the case of empty car or even load distribution, the inclination of the car floor after actuation of the safety gear should not be more than 5% of its normal position. (Act 9.8.7)

4. The car should be equipped with safety tongs which can be operated in the downward direction, and when the speed limiter is reached, even if the suspension device breaks, the safety tongs should clamp the guide rail to stop and keep the car equipped with rated load capacity in a static state. (Act 9.8.1.1)

At present, assembly and debugging of a safety tongs lifting rod mechanism usually depend on workers with abundant experience for debugging, and a reliable detection means is not available, so that the accuracy and reliability of the assembly and debugging processes of the safety tongs lifting rod mechanism cannot be ensured.

Disclosure of Invention

The invention aims to provide the debugging equipment and the debugging method for the progressive safety tongs lifting mechanism of the elevator, which reduce manual experience interference and improve the debugging accuracy and reliability of the safety tongs lifting rod mechanism, thereby ensuring the accuracy and reliability of actions of the safety tongs and improving the operation safety of the elevator.

To achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, there is provided an elevator progressive safety gear lifting mechanism commissioning device comprising:

the test bench is provided with two guide rails which are spaced and opposite;

the elevator car comprises a tested car frame, wherein guide shoes in sliding fit with guide rails are correspondingly arranged on two opposite sides of the tested car frame, and the tested car frame comprises two vertical beams arranged at intervals, and an upper cross beam and a lower cross beam which are connected with the two vertical beams;

the first safety tongs and the second safety tongs are respectively arranged at two ends of the upper beam, the first safety tongs are a speed limiter side safety tongs, and the first safety tongs and the second safety tongs comprise a driving wedge block and a driven wedge block which can be mutually close to or far away from each other;

the lifting device comprises a first driving part and a tension detecting part, the first driving part is arranged on the upper cross beam and is used for driving the driving wedge block of the first safety tongs and the driving wedge block of the second safety tongs to move upwards so that the driving wedge block and the corresponding driven wedge block clamp the guide rail, and the tension detecting part is used for detecting the lifting force of the first driving part;

the distance measuring device is used for detecting the displacement of the active wedge block;

The push-pull device is connected between the lower cross beam and the bottom of the test bench, and comprises a second driving piece, a push-pull force detection piece and a first displacement detection piece, wherein the second driving piece is used for applying load to the tested car frame, the push-pull force detection piece is used for detecting the push-pull force of the second driving piece, and the first displacement detection piece is used for detecting the displacement of the tested car frame;

and the control unit is in communication connection with the first driving piece, the tension detecting piece, the distance measuring device, the second driving piece, the push-pull force detecting piece and the first displacement detecting piece.

As the preferable scheme of the elevator progressive safety tongs lifting mechanism debugging equipment provided by the invention, the upper cross beam is rotatably provided with the transversely extending dowel bar, two ends of the dowel bar are respectively provided with the first dowel bar and the second dowel bar, one end of the first dowel bar, which is far away from the dowel bar, is rotationally connected with the driving wedge block of the first safety tongs, one end of the second dowel bar, which is far away from the dowel bar, is rotationally connected with the driving wedge block of the second safety tongs, and the output end of the first driving piece is connected to the first dowel bar and is positioned between the dowel bar and the driving wedge block of the first safety tongs.

As the preferable scheme of the elevator progressive safety tongs lifting mechanism debugging equipment provided by the invention, the first safety tongs and the second safety tongs also comprise a base body fixed on the upper beam, a first guide plate and a second guide plate arranged on the base body, the driving wedge block is in sliding fit with the first guide plate, the driven wedge block is in sliding fit with the second guide plate, the first safety tongs and the second safety tongs are both provided with the distance measuring device, the distance measuring device comprises a second displacement detection part arranged on the first guide plate and a movable part protruding on the driving wedge block, and the second displacement detection part is used for detecting the displacement of the movable part.

As the preferable scheme of the elevator progressive safety tongs lifting mechanism debugging equipment provided by the invention, the distance measuring device further comprises a mounting seat, wherein the mounting seat comprises a mounting part and a positioning part which are vertically connected, one side of the first guide plate, which is opposite to the second guide plate, is provided with a positioning groove, the positioning part is clamped into the positioning groove, the mounting part is attached to the surface of the first guide plate, and the second displacement detection part is arranged on the mounting part.

As the preferable scheme of the elevator progressive safety tongs lifting mechanism debugging equipment provided by the invention, the first driving piece comprises a first torque motor, a first screw rod is vertically and movably arranged on the first torque motor, one side, far away from the first torque motor, of the first screw rod is sequentially provided with the tension detecting piece, the joint bearing and a retaining ring detachably arranged on the joint bearing, and the retaining ring is connected with the driving wedge block.

As the preferable scheme of the debugging equipment of the progressive safety tongs lifting mechanism of the elevator, the second driving piece comprises a second torque motor, a second screw rod is vertically and movably arranged on the second torque motor, one side, far away from the second torque motor, of the second screw rod is sequentially provided with the push-pull force detection piece and the connecting plate, and the connecting plate is connected to the bottom surface of the lower beam.

As the preferable scheme of the elevator progressive safety tongs lifting mechanism debugging equipment provided by the invention, the test bench is provided with the mounting frame, the control unit comprises the electric control box body, the electric control box body is arranged on the mounting frame, the electric control box body is internally provided with the PLC controller and the torque controller which are in communication connection, the torque controller is used for controlling the first driving piece and the second driving piece to output torque, and the electric control box body is provided with the man-machine interaction interface and the scram switch.

In a second aspect, a method for debugging a progressive safety gear lifting mechanism of an elevator is provided, wherein the debugging device of the progressive safety gear lifting mechanism of the elevator is adopted for debugging, and the method comprises the following steps:

s1, controlling the first driving part to output lifting force, and detecting whether the displacement D1 of an active wedge block of the first safety gear and the displacement D2 of an active wedge block of the second safety gear exceed a specified range, wherein the first safety gear is a safety gear on a speed limiter side;

s2, controlling the second driving part to output push-pull force, and judging whether a safety gap exists between the active wedge block and the passive wedge block and the surface of the guide rail on the premise that both D1 and D2 are in a specified range;

s3, controlling the first driving piece to output lifting force and testing initial clamping force F _{Initially, the method comprises} And judge the primary clamping force F _{Initially, the method comprises} Whether the safety condition of the clamping force of the speed limiter is met or not;

s4, controlling the first driving piece to output linear lifting force, and judging whether the difference value between D2 and D1 is within a preset range or not so as to judge whether the gradient of the tested car frame meets the requirement or not;

s5, controlling the first driving piece to output lifting force and the second driving piece to output downward force, and detecting whether the increment of the displacement of the tested car frame is 0.

As the preferable scheme of the debugging method of the elevator progressive safety tongs lifting mechanism provided by the invention,

in the step S2, whether the active wedge block and the passive wedge block are in contact with the surface of the guide rail or not is judged by comparing the variation of the front detection value and the rear detection value of the push-pull force detection piece;

in the step S3, when the pulling force is increased but the displacement value is not increased by any one of D1 and D2, the detection value of the pulling force detection piece is the primary clamping force F _{Initially, the method comprises} 。

in the step S4, the step of controlling the first driving member to output the linear lifting force sequentially includes:

s41, increasing the lifting force to 0.5F _{Initially, the method comprises} And hold for T1 time;

s42, lifting force is changed from 0.5F _{Initially, the method comprises} To 0.7F _{Initially, the method comprises} And hold for a T2 time;

s43, lifting force is 0.7F _{Initially, the method comprises} To 0.9F _{Initially, the method comprises} And hold for a T3 time;

s44, lifting force is changed from 0.9F _{Initially, the method comprises} Increase to F _{Initially, the method comprises} And held for a T4 time.

The invention has the beneficial effects that:

the invention provides a debugging device and a debugging method for a lifting mechanism of an elevator progressive safety tongs, wherein when the debugging device is used for debugging, a control unit controls a first driving part to output lifting force so as to detect whether the displacement D1 of an active wedge block of a first safety tongs and the displacement D2 of an active wedge block of a second safety tongs exceed a specified range, thereby avoiding overlarge displacement of the active wedge block of the first safety tongs and the displacement of the active wedge block of the second safety tongs. Control unit The second driving part can be controlled to output push-pull force, and on the premise that both D1 and D2 are in a specified range, whether the active wedge block and the passive wedge block have a safety gap with the surface of the guide rail or not is judged. The control unit can control the first driving piece to output lifting force so as to test the primary clamping force F _{Initially, the method comprises} And judge the initial clamping force F _{Initially, the method comprises} Whether the safety condition of the clamping force of the speed limiter is met or not. The control unit can control the first driving piece to output linear lifting force, judges whether the difference value of D2 and D1 is in a preset range, and the difference value of D2 and D1 is used for reflecting the gradient of the tested car frame so as to judge whether the gradient of the tested car frame meets national standard requirements. The control unit can control the first driving piece to output lifting force and the second driving piece to output pulling force so as to detect whether the displacement increment of the tested car frame is 0, thereby ensuring that the safety tongs can clamp the guide rail when the action speed of the speed limiter is reached, so that the car with rated load capacity is stopped and kept in a static state, and ensuring the safety performance of the elevator. According to the debugging equipment and the method, through communication connection of the control unit and each detection part and each driving part, manual experience interference can be reduced, required data can be accurately collected, the debugging accuracy and reliability of the safety tongs lifting rod mechanism are improved, the accuracy and reliability of actions of the safety tongs are ensured, and the operation safety of an elevator is improved.

Drawings

Fig. 1 is a schematic structural view of an elevator progressive safety gear lifting mechanism debugging device provided by an embodiment of the invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural view of a test bench according to an embodiment of the invention;

FIG. 4 is an enlarged view of a portion of the invention at B in FIG. 3;

fig. 5 is a schematic structural view of a tested car frame according to an embodiment of the present invention;

FIG. 6 is a schematic view illustrating the installation of a first safety gear and ranging device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating connection between a pulling device and a first safety gear according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the connection of a second safety gear provided in an embodiment of the present invention;

FIG. 9 is a schematic structural view of a pulling device according to an embodiment of the present invention;

FIG. 10 is a schematic view of a push-pull device according to an embodiment of the present invention;

FIG. 11 is a control schematic of a control unit according to an embodiment of the present invention;

fig. 12 is a graph showing the setting of the pulling force output by the first driving member in step S4 according to the present invention.

In the figure:

1. a test bench; 2. a tested car frame; 3. a first safety gear; 4. a second safety gear; 5. a lifting device; 6. a distance measuring device; 7. a push-pull device; 8. a control unit;

11. A guide rail; 12. a base; 13. a supporting stand; 14. a pressing plate; 15. a mounting frame;

21. a guide shoe; 22. a vertical beam; 23. an upper cross beam; 24. a lower cross beam; 25. a dowel bar; 26. the first force transmission crank arm; 27. the second force transmission crank arm;

31. a driving wedge block; 32. a passive wedge; 33. a base; 34. a first guide plate; 35. a second guide plate; 341. a positioning groove;

51. a first driving member; 52. a tension detecting member; 53. a knuckle bearing; 54. a clasp ring; 55. a fixing plate;

511. a first torque motor; 512. a first screw rod;

61. a second displacement detecting member; 62. a movable member; 63. a mounting base;

631. a mounting part; 632. a positioning part;

71. a second driving member; 72. a push-pull force detecting member; 73. a first displacement detecting member; 74. a connecting plate;

711. a second torque motor; 712. a second screw rod;

81. an electric control box body; 82. and a human-computer interaction interface.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 and 2, the present embodiment provides a debugging device for an elevator progressive safety gear lifting mechanism, which comprises a test bench 1, a tested car frame 2, a first safety gear 3, a second safety gear 4, a lifting device 5, a distance measuring device 6 and a control unit 8.

Referring to fig. 3, the test bench 1 includes a base 12 and two supporting stands 13 spaced apart and vertically disposed on the base 12. The base 12 is I-shaped, so that the contact area with the ground can be increased, and the stability of the equipment can be improved. The two supporting uprights 13 are provided with guide rails 11 on each side facing each other, which guide rails 11 extend vertically and function as guide rails for the elevator in its ascent and descent.

Referring to fig. 3 and 4, a plurality of pressing plates 14 are vertically and respectively arranged on the two guide rails 11 at intervals, and the pressing plates 14 are pressed on the joint surfaces of the guide rails 11 and the supporting stand 13. The fastener passes through the pressing plate 14 and is screwed with the supporting stand 13 to press and fix the guide rail 11 to the supporting stand 13.

Referring to fig. 5, the test car frame 2 includes an upper cross member 23, a lower cross member 24, and two upright beams 22 disposed at intervals. The upper cross beam 23 is connected to the upper ends of the two upright beams 22 and is perpendicular to the two upright beams 22. The lower cross member 24 is connected to the lower ends of the two upright beams 22 and is perpendicular to the two upright beams 22. That is, the upper beam 23, the lower beam 24, and the two upright beams 22 are enclosed to form a rectangular frame structure for simulating the car frame of the elevator.

With continued reference to fig. 5, one guide shoe 21 is disposed above the upper beam 23 at each of the two ends, one guide shoe 21 is disposed below the lower beam 24 at each of the two ends, the two guide shoes 21 on the left are slidably engaged with the guide rail 11 on the left, and the two guide shoes 21 on the right are slidably engaged with the guide rail 11 on the right (refer to the orientations in fig. 3 and 5).

The first safety gear 3 and the second safety gear 4 are respectively arranged at two ends of the upper beam 23, and the two safety gears have the same structure in the embodiment. The first safety gear 3 and the second safety gear 4 can clamp or release the guide rail 11 to simulate the normal running state of the elevator and the downward acceleration running of the elevator car, and the speed limiter and the safety gear act together to forcedly stop the elevator car on the elevator guide rail.

Specifically, referring to fig. 6, taking the first safety gear 3 as an example, the first safety gear 3 includes a seat 33, a first guide plate 34, a second guide plate 35, and an active wedge 31 and a passive wedge 32 that can be moved toward or away from each other. The seat 33 is fixed to an end of the upper beam 23, and defines a mounting groove therein, in which the first guide plate 34 and the second guide plate 35 are fixedly disposed. The sides of the first and

second guide plates

34 and 35 facing each other are each provided with a guide slope such that the interval between the first and

second guide plates

34 and 35 gradually decreases from bottom to top. The driving wedge 31 is in sliding fit with the first guide plate 34, specifically, the inclined surface on the driving wedge 31 is in sliding fit with the guide inclined surface of the first guide plate 34; passive wedge 32 is slidably engaged with second guide plate 35, and specifically, the inclined surface on passive wedge 32 is slidably engaged with the guide inclined surface of second guide plate 35 to enable active wedge 31 and passive wedge 32 to move toward and away from each other to clamp or release the corresponding guide rail 11.

Referring to fig. 7 and 8, the structure of the second safety gear 4 is identical to that of the first safety gear 3, and will not be described again. The first safety gear 3 and the second safety gear 4 are both provided with a distance measuring device 6. The distance measuring device 6 is used for detecting the displacement of the driving wedge 31 on the two safety tongs.

Referring to fig. 7 and 9, the pulling device 5 includes a first driving member 51 and a tension detecting member 52, where the first driving member 51 is disposed on the upper beam 23, and is used to drive the driving wedge 31 of the first safety gear 3 and the driving wedge 31 of the second safety gear 4 to move upwards, so that the driving wedge 31 and the corresponding driven wedge 32 clamp the guide rail 11. Specifically, the first driving element 51 can apply a lifting force to make the active wedge 31 of the first safety gear 3 and the active wedge 31 of the second safety gear 4 move upwards, the active wedge 31 gradually approaches to the surface of the guide rail 11 in the upward moving process, and when the lifting force is continuously applied after the active wedge 31 and the passive wedge 32 are in contact with the surface of the guide rail 11, the active wedge 31 and the passive wedge 32 can clamp the middle guide rail 11 more tightly. The tension detecting member 52 is for detecting the pulling force applied by the first driving member 51.

When the actual elevator runs, if the elevator car suddenly accelerates downwards, the speed limiter rope can apply lifting force to the safety tongs so that the two wedge blocks of the safety tongs clamp the elevator guide rail. While the safety gear on the elevator car has a tendency to move downwards in relation to the elevator guide rail so that the two wedges clamp the guide rail tighter.

In this embodiment, the process of applying the lifting force to the safety tongs by the speed limiter rope is simulated by arranging the lifting device 5, and the lifting force value applied by the first driving member 51 is detected by the tension detecting member 52, and the lifting force value is the tension value of the speed limiter rope.

Referring to fig. 1, a push-pull device 7 is connected between a lower cross beam 24 of the test car frame 2 and a base 12 of the test bench 1 for simulating a load condition when the test car frame 2 is operated. Specifically, referring to fig. 10, the push-pull device 7 includes a second driving member 71, a push-pull force detecting member 72, and a first displacement detecting member 73, the second driving member 71 being for applying a load to the test car frame 2. The car frame 2 to be tested has states of ascending acceleration, ascending deceleration, descending acceleration, descending deceleration and the like when actually running. By providing the push-pull device 7, a push-pull force can be applied to the tested car frame 2, so that the actual ascending and descending process of the tested car frame can be simulated. The push-pull force detecting member 72 is for detecting the push-pull force of the second driving member 71. The first displacement detector 73 detects the displacement of the test car frame 2. After the first safety gear 3 and the second safety gear 4 are operated, the tested car frame 2 with rated load capacity should be stopped and kept in a static state, i.e. the measured displacement increment of the tested car frame 2 should be 0.

The control unit 8 is communicatively connected to the first driving member 51, the tension detecting member 52, the distance measuring device 6, the second driving member 71, and the push-pull force detecting member 72. The control unit 8 is able to control the first drive member 51 and the second drive member 71 to output a satisfactory force according to the set parameters. And, the control unit 8 can acquire the detection values of the tension detecting piece 52, the distance measuring device 6, the push-pull force detecting piece 72 and the first displacement detecting piece 73, thereby knowing the displacement amount of the driving wedge 31 and the displacement amount of the tested car frame 2.

It should be emphasized that in the present embodiment, the lifting device 5 is used to simulate a speed limiter, and the first safety gear 3 is located on the same side as the lifting device 5, i.e. the first safety gear 3 is the speed limiter side safety gear in an actual elevator. As shown in fig. 1 and 2, both the pulling device 5 and the first safety gear 3 are located on the right side of the upper cross beam 23, corresponding to the speed limiter and the speed limiter-side safety gear on an actual elevator.

The arrangement mode of the debugging equipment in the embodiment can simulate the actual running working conditions of the elevator speed limiter side safety tongs and the speed limiter opposite side safety tongs more realistically, and corresponding inspection items are completed for the two safety tongs, so that the reliability and the accuracy of inspection results are improved.

In this embodiment, when the debugging device is used for debugging, the control unit 8 controls the first driving member 51 to output the lifting force so as to detect whether the displacement D1 of the active wedge 31 of the first safety gear 3 and the displacement D2 of the active wedge 31 of the second safety gear 4 exceed a predetermined range, thereby avoiding the excessive displacement of the active wedge 31 of the first safety gear 3 and the active wedge 31 of the second safety gear 4. A suitable magnitude of the governor tension value is obtained at this stage.

The control unit 8 can control the second driver 71 to output a push-pull force, and on the premise that both D1 and D2 are within a specified range, it is determined whether a safety gap exists between the surfaces of the driving wedge 31 and the driven wedge 32 and the guide rail 11, and the purpose is to ensure that a safety gap exists between the surfaces of the driving wedge 31 and the driven wedge 32 and the guide rail 11 when the elevator is operating normally, so that friction between the driving wedge 31 and the driven wedge 32 and the guide rail 11 is avoided.

The control unit 8 can control the first driving member 51 to output lifting force to test the primary clamping force F _{Initially, the method comprises} And judge the initial clamping force F _{Initially, the method comprises} Whether the safety condition of the clamping force of the speed limiter or not is met or not is ensured, so that the speed limiter can enable the first safety gear 3 and the second safety gear 4 to act until the two clamp the guide rails 11 on two sides.

The control unit 8 can control the first driving member 51 to output a linear lifting force, and determine whether the difference between D2 and D1 is within a preset range, where the difference between D2 and D1 is used to reflect the inclination of the tested car frame 2, so as to determine whether the inclination of the tested car frame 2 meets the national standard requirement.

Further, the control unit 8 can control the first driving member 51 to output a lifting force and the second driving member 71 to output a pulling force so as to simulate the process that the first safety gear 3 and the second safety gear 4 act to clamp the guide rail 11 when the tested car frame 2 is accelerated, and the detected value of the first displacement detecting member 73 can determine whether the displacement increment of the tested car frame 2 is 0, so that when the speed limiter action speed is reached, the safety gear can clamp the guide rail, so that the car with rated load capacity is stopped and kept in a static state, and the safety performance of the elevator is ensured.

According to the debugging equipment and the method, through the communication connection between the control unit 8 and each detection part and each driving part, manual experience intervention can be reduced, required data can be accurately acquired, the debugging accuracy and reliability of the safety tongs lifting rod mechanism are improved, the accuracy and reliability of actions of the safety tongs are ensured, and the operation safety of an elevator is improved.

Referring to fig. 5, 7 and 8, the upper beam 23 is rotatably provided with a transversely extending force transmission rod 25, and the force transmission rod 25 is parallel to the upper beam 23. The two ends of the dowel bar 25 are respectively provided with a first dowel bar 26 and a second dowel bar 27, and the first dowel bar 26 and the second dowel bar 27 are perpendicular to the dowel bar 25. As shown in fig. 7, the end of the first force-transmitting lever 26 remote from the force-transmitting lever 25 is rotatably connected to the driving wedge 31 of the first safety gear 3, and the output end of the first driver 51 is connected to the first force-transmitting lever 26 and is located between the force-transmitting lever 25 and the driving wedge 31 of the first safety gear 3. As shown in fig. 8, the end of the second force-transmitting lever 27 remote from the force-transmitting lever 25 is rotatably connected to the driving wedge 31 of the second safety gear 4.

When the first driving piece 51 outputs lifting force, the first force transmission crank arm 26 can be driven to rotate around the center of the force transmission rod 25, so that the driving wedge 31 of the first safety gear 3 is driven to move upwards to clamp the right guide rail 11 with the driven wedge 32. Simultaneously, the dowel bar 25 is driven by the first dowel bar 26 to synchronously rotate, so that the second dowel bar 27 is driven to rotate around the center of the dowel bar 25, and the driving wedge 31 of the second safety gear 4 is driven to move upwards to clamp the left guide rail 11 with the driven wedge 32.

In this embodiment, the lifting device 5 for simulating the speed limiter is arranged at one side of the first safety gear 3, and the lifting device 5 can simultaneously make the first safety gear 3 and the second safety gear 4 act through the dowel 25, so that the coordination action process of the speed limiter and the safety gears at two sides of the elevator car can be simulated truly.

Referring to fig. 6, the distance measuring device 6 includes a second displacement detecting member 61 provided on the first guide plate 34 and a movable member 62 protruding on the driving wedge 31, and when the movable member 62 on the driving wedge 31 moves relative to the second displacement detecting member 61, the second displacement detecting member 61 can detect and record the displacement amount of the movable member 62. In the present embodiment, the second displacement detecting member 61 is a displacement sensor, and the displacement sensor may be a resistive displacement sensor, for example.

In order to ensure that the mounting positions of the two ranging devices 6 on the corresponding first guide plates 34 are consistent, the ranging devices 6 further comprise mounting seats 63, and the mounting seats 63 have a positioning function. Specifically, referring to fig. 7 and 8, the mounting seat 63 includes a mounting portion 631 and a positioning portion 632 that are vertically connected, a positioning groove 341 is disposed on a side of the first guide plate 34 opposite to the second guide plate 35, and the positioning portion 632 is clamped into the positioning groove 341, so as to realize quick positioning of the ranging device 6, and only needs to ensure that the positions of the positioning grooves 341 on the two first guide plates 34 are consistent. The mounting portion 631 is attached to the surface of the first guide plate 34, and the second displacement detector 61 is provided on the mounting portion 631.

Referring to fig. 9, a schematic structural view of the pulling device 5 is shown. The first driving member 51 includes a first torque motor 511, and a first screw 512 is vertically movably provided on the first torque motor 511. The first torque motor 511 can output a linear pulling force through the first screw 512 or stabilize the pulling force at a certain value. The side of the first screw rod 512 away from the first torque motor 511 is sequentially provided with the tension detecting piece 52, the knuckle bearing 53 and the retaining ring 54 detachably mounted on the knuckle bearing 53, and the retaining ring 54 is connected with the hanging ring on the first force transmission crank arm 26. By providing the knuckle bearing 53, a rigid connection between the pulling device 5 and the first force-transmitting lever 26 can be avoided, and the rotation of the first force-transmitting lever 26 can be accommodated. The retaining ring 54 is buckled with the hanging ring, so that the retaining ring and the hanging ring can be prevented from being separated.

Further, a fixing plate 55 is provided at the lower end of the first torque motor 511, and the fixing plate 55 is connected to the upper beam 23. The fixing plate 55 is illustratively connected to the upper cross member 23 by threaded fasteners.

Referring to fig. 10, a schematic structural view of the push-pull device 7 is shown. The second driving member 71 includes a second torque motor 711, and a second screw 712 is vertically movably provided on the second torque motor 711. The second torque motor 711 can output a linear push-pull force through the second screw 712, or stabilize the push-pull force at a certain value. The second screw rod 712 is provided with the push-pull force detecting member 72 and the connecting plate 74 sequentially on a side far away from the second torque motor 711, and the push-pull force detecting member 72 and the connecting plate 74 are connected by a connecting rod. A connection plate 74 is connected to the bottom surface of the lower beam 24, and a housing of the second torque motor 711 is fixed to the base 12 of the test bench 1 to fix the push-pull device 7 between the lower beam 24 and the base 12. The first displacement detector 73 is connected between the lower cross member 24 and the base 12, preferably as a displacement sensor.

In the present embodiment, the second displacement detector 61 for detecting the displacement of the active wedge 31 of the first safety gear 3 is defined as a first displacement sensor, and the second displacement detector 61 for detecting the displacement of the active wedge 31 of the second safety gear 4 is defined as a second displacement sensor. The first displacement detector 73 is defined as a displacement sensor three. Further, the tension detecting member 52 is a tension sensor, and the push-pull force detecting member 72 is a push-pull force sensor.

Referring to fig. 2 and 4, the upper end of the supporting stand 13 of the test bench 1 is provided with a mounting frame 15, and the control unit 8 includes an electric cabinet 81, and the electric cabinet 81 is disposed on the mounting frame 15. The electric control box 81 is provided with a PLC controller and a torque controller which are connected in communication, and the torque controller is used for controlling the first driving member 51 (the first torque motor 511) and the second driving member 71 (the second torque motor 711) to output torque. In particular to this embodiment, the torque controller includes a first torque motor controller and a second torque motor controller. Referring to fig. 11, the plc controller can input signals to the first and second torque motor controllers according to the set parameters, and the first and second torque motor controllers can further control the first and

second torque motors

511 and 711 to output counter stress values according to the signals.

Further, the first displacement sensor, the second displacement sensor, the third displacement sensor, the tension sensor and the push-pull sensor are all in communication connection with the PLC controller, so that the PLC controller can acquire detection values of the sensors.

A man-machine interaction interface 82 is arranged on the electric cabinet 81. Referring to fig. 11, parameters such as governor tension, governor clamp force, and car rated load force may be set via the human-machine interface 82. In addition, the man-machine interface 82 may also display the required parameters in real time, such as the first detection value of the displacement sensor (the displacement of the safety gear 1 in fig. 11), the second detection value of the displacement sensor (the displacement of the safety gear 2 in fig. 11), the third detection value of the displacement sensor (the displacement of the car in fig. 11), the detection value of the tension sensor (the tension of the speed limiter in fig. 11), the detection value of the push-pull force sensor (the load force of the car in fig. 11), and the like. The debugger can judge whether the test is qualified or not according to the parameters displayed by the interface.

Optionally, an emergency stop switch is arranged on the electric control box 81, and the emergency stop switch is used for stopping the operation of the equipment in an emergency, so that the safety of the equipment is ensured. In addition, a plurality of function selection buttons such as a "tension start button", a "initial clamping force start button", a "load start button", and the like (described below) are provided on the electric cabinet 81. Further, an indicator light is further provided on the electric control box 81, for indicating the corresponding button to be turned on or off.

And a power supply is further arranged in the electric control box 81 and is used for supplying power to electronic elements such as the PLC controller, the first torque motor controller, the second torque motor controller, the man-machine interaction interface 82, the scram switch, the button, the indicator lamp and the like.

The embodiment also provides a debugging method of the elevator progressive safety tongs lifting mechanism, which adopts the elevator progressive safety tongs lifting mechanism debugging equipment to debug, and comprises the following steps:

s0, powering up the equipment, entering parameter setting in a man-machine interaction interface 82, and respectively inputting the tension of the speed limiter, the clamping force of the speed limiter and the rated load of the car according to debugging requirements.

S1, controlling the first driving part 51 to output lifting force, detecting whether the displacement D1 of the driving wedge 31 of the first safety gear 3 and the displacement D2 of the driving wedge 31 of the second safety gear 4 exceed a specified range, wherein the first safety gear 3 is a safety gear on the side of a speed limiter, and the second safety gear 4 is a safety gear on the opposite side of the speed limiter.

Specifically, when the "tension start button" is pressed to start the debugging, the PLC controller inputs a signal to the first torque motor controller through the magnitude of the tension value of the speed limiter, and the first torque motor controller controls the first torque motor 511 to output a tension (to reach the corresponding tension and hold). Meanwhile, the PLC controller compares whether the displacement D1 of the active wedge 31 of the first safety gear 3 and the displacement D2 of the active wedge 31 of the second safety gear 4 (i.e., the displacement of the safety gear 1 and the displacement of the safety gear 2 in fig. 11) are within a predetermined range, and checks both safety gears and adjusts the lift lever mechanism if they are out of the predetermined range. If the displacement is within the specified range, the next debugging is performed.

S2, controlling the second driving element 71 to output push-pull force, and judging whether a safety gap exists between the surfaces of the driving wedge block 31 and the driven wedge block 32 and the guide rail 11 on the premise that both the D1 and the D2 are within a specified range.

Specifically, in S2, the PLC controller inputs a signal to the second torque motor controller, and the second torque motor controller controls the second torque motor 711 to operate, and determines whether the active wedge 31 and the passive wedge 32 are in contact with the surface of the guide rail 11 by comparing the amounts of change in the front and rear detection values of the push-pull force detector 72. If the active wedge 31 and/or the passive wedge 32 are in contact with the surface of the guide rail 11, the detection value of the push-pull force sensor is obviously increased due to friction resistance, and whether a safety gap exists between the two safety tongs and the surface of the guide rail 11 can be judged by comparing the change of the front and rear force values of the push-pull force sensor. If not, checking the two safety tongs and adjusting the lifting rod mechanism. And (5) after the product is qualified, carrying out the next step.

S3, controlling the first driving piece 51 to output lifting force so as to test the initial stageClamping force F _{Initially, the method comprises} And judge the initial clamping force F _{Initially, the method comprises} Whether the safety condition of the clamping force of the speed limiter is met or not; when the pulling force is increased but the displacement value is not increased by either of D1 and D2, the detected value of the pulling force detecting member 52 is the initial clamping force F _{Initially, the method comprises} 。

Specifically, in S3, when the "initial clamping force start button" is pressed to start debugging, the PLC controller inputs a signal to the first torque motor controller, and the first torque motor controller controls the first torque motor 511 to output a pulling force, and at the same time, the PLC controller monitors the detection values of the pulling force sensor, the first displacement sensor and the second displacement sensor in real time, wherein the pulling force value of the pulling force sensor when the pulling force increases but the displacement amount does not increase is defined as the initial clamping force F _{Initially, the method comprises} . And the PLC records the primary clamping force, compares the primary clamping force with the clamping force of the speed limiter, and terminates debugging if the primary clamping force is greater than the clamping force of the speed limiter. And when the primary clamping force meets the safety condition smaller than or equal to the clamping force of the speed limiter, performing the next test.

S4, controlling the first driving piece 51 to output linear lifting force, judging whether the difference value between D2 and D1 is within a preset range or not so as to judge whether the gradient of the tested car frame 2 meets the requirement or not;

in S4, the PLC controller inputs a signal to the first torque motor controller according to the set curve shown in fig. 12, and the first torque motor controller controls the first torque motor 511 to output a pulling force (to achieve a corresponding pulling force and maintain), specifically, the steps of controlling the first torque motor 511 to output a linear pulling force are as follows:

Meanwhile, the PLC compares the displacement D1 of the driving wedge 31 of the first safety tongs 3 with the displacement D2 of the driving wedge 31 of the second safety tongs 4, if the value of D1 is smaller than the value of D2 by 1 mm-2 mm, the difference between D2 and D1 is indicated to be in a preset range, and if the difference exceeds the preset range, the lifting rod mechanism is manually adjusted, and then the test is repeated to enable the lifting rod mechanism to meet the requirement. In this step, the force values of 50%, 70%, 90% and 100% of the initial clamping force are tested, and the next force value is tested after one force value is qualified. And after all the products are qualified, carrying out the next step.

S5, controlling the first driving piece 51 to output lifting force and the second driving piece 71 to output downward force, and detecting whether the increment of the displacement of the tested car frame 2 is 0.

Pressing the load start button starts debugging, and the PLC controller inputs signals to the first torque motor controller through the clamping force value of the speed limiter, and the first torque motor controller controls the first torque motor 511 to output pulling force (reaching the corresponding pulling force and keeping). Subsequently, the PLC controller inputs a signal to the second torque motor controller through the magnitude of the rated load of the car, and the second torque motor controller controls the second torque motor 711 to output a tensile force (to reach the corresponding tensile force and to hold) so as to simulate the rated load of the tested car frame 2. The PLC monitors whether the detection value of the displacement sensor III is within a limited range in real time, namely whether the increment of the displacement amount of the tested car frame 2 is 0.

According to the debugging method of the elevator progressive safety tongs lifting mechanism provided by the embodiment, the tension value of the speed limiter and the initial clamping force of the safety tongs are displayed on the human-computer interaction interface 82 through the tension sensor and the corresponding module; displaying the rated load of the car in real time on a man-machine interaction interface 82 through a push-pull force sensor and a corresponding module; displaying the displacement of the active wedge 31 of the first safety tongs 3 in real time on the man-machine interaction interface 82 through the first displacement sensor and the corresponding module; displaying the displacement of the active wedge 31 of the second safety tongs 4 in real time on the man-machine interaction interface 82 through the second displacement sensor and the corresponding module; the car displacement (namely the displacement of the tested car frame 2) is displayed in real time on the man-machine interaction interface 82 through the displacement sensor III and the corresponding module. Original debugging work is carried out through experience of operators, corresponding data are detected through each sensor to carry out debugging, meanwhile, the debugging result is quantized, a large amount of debugging data can be saved, later maintenance and tracking are facilitated, and safe operation of the elevator is ensured.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. An elevator progressive safety tongs lifting mechanism debugging equipment, characterized by comprising:

the test bench (1), the test bench (1) is provided with two guide rails (11) which are spaced and opposite;

the elevator car frame (2) to be tested is correspondingly provided with guide shoes (21) which are in sliding fit with the guide rails (11) at two opposite sides, and the elevator car frame (2) to be tested comprises two vertical beams (22) which are arranged at intervals, and an upper cross beam (23) and a lower cross beam (24) which are connected with the two vertical beams (22);

the first safety tongs (3) and the second safety tongs (4) are respectively arranged at two ends of the upper beam (23), the first safety tongs (3) are stopper-side safety tongs, and the first safety tongs (3) and the second safety tongs (4) comprise a driving wedge block (31) and a driven wedge block (32) which can be mutually close to or far from each other;

the lifting device (5) comprises a first driving part (51) and a tension detecting part (52), wherein the first driving part (51) is arranged on the upper cross beam (23) and is used for driving the driving wedge block (31) of the first safety tongs (3) and the driving wedge block (31) of the second safety tongs (4) to move upwards so that the driving wedge block (31) and the corresponding driven wedge block (32) clamp the guide rail (11), and the tension detecting part (52) is used for detecting the lifting tension of the first driving part (51);

A distance measuring device (6) for detecting the displacement of the active wedge (31);

the push-pull device (7) is connected between the lower cross beam (24) and the bottom of the test bench (1), the push-pull device (7) comprises a second driving piece (71), a push-pull force detection piece (72) and a first displacement detection piece (73), the second driving piece (71) is used for applying a load to the tested car frame (2), the push-pull force detection piece (72) is used for detecting the push-pull force of the second driving piece (71), and the first displacement detection piece (73) is used for detecting the displacement of the tested car frame (2);

the control unit (8) is in communication connection with the first driving piece (51), the tension detecting piece (52), the distance measuring device (6), the second driving piece (71), the push-pull force detecting piece (72) and the first displacement detecting piece (73).

2. The elevator progressive safety gear lifting mechanism debugging device according to claim 1, wherein a transversely extending force transmission rod (25) is rotatably arranged on the upper beam (23), two ends of the force transmission rod (25) are respectively provided with a first force transmission crank arm (26) and a second force transmission crank arm (27), one end of the first force transmission crank arm (26) away from the force transmission rod (25) is rotatably connected with a driving wedge (31) of the first safety gear (3), one end of the second force transmission crank arm (27) away from the force transmission rod (25) is rotatably connected with a driving wedge (31) of the second safety gear (4), and an output end of the first driving piece (51) is connected to the first force transmission crank arm (26) and is located between the force transmission rod (25) and the driving wedge (31) of the first safety gear (3).

3. The elevator progressive safety gear lifting mechanism debugging device according to claim 1, wherein the first safety gear (3) and the second safety gear (4) each further comprise a base (33) fixed on the upper beam (23), a first guide plate (34) and a second guide plate (35) arranged on the base (33), the driving wedge (31) is slidably matched with the first guide plate (34), the driven wedge (32) is slidably matched with the second guide plate (35), the ranging device (6) is arranged on each of the first safety gear (3) and the second safety gear (4), the ranging device (6) comprises a second displacement detection piece (61) arranged on the first guide plate (34) and a movable piece (62) convexly arranged on the driving wedge (31), and the second displacement detection piece (61) is used for detecting the displacement amount of the movable piece (62).

4. The elevator progressive safety gear lifting mechanism debugging device according to claim 3, wherein the distance measuring device (6) further comprises a mounting seat (63), the mounting seat (63) comprises a mounting portion (631) and a positioning portion (632) which are vertically connected, a positioning groove (341) is formed in one side, facing away from the second guide plate (35), of the first guide plate (34), the positioning portion (632) is clamped into the positioning groove (341), the mounting portion (631) is attached to the surface of the first guide plate (34), and the second displacement detecting piece (61) is arranged on the mounting portion (631).

5. The elevator progressive safety gear lifting mechanism debugging device according to claim 4, wherein the first driving member (51) comprises a first torque motor (511), a first screw rod (512) is vertically and movably arranged on the first torque motor (511), one side, away from the first torque motor (511), of the first screw rod (512) is sequentially provided with the tension detecting member (52), a joint bearing (53) and a retaining ring (54) detachably mounted on the joint bearing (53), and the retaining ring (54) is connected with the driving wedge (31).

6. The elevator progressive safety gear lifting mechanism debugging device according to claim 1, wherein the second driving member (71) comprises a second torque motor (711), a second screw rod (712) is vertically and movably arranged on the second torque motor (711), the push-pull force detecting member (72) and the connecting plate (74) are sequentially arranged on one side, away from the second torque motor (711), of the second screw rod (712), and the connecting plate (74) is connected to the bottom surface of the lower beam (24).

7. The elevator progressive safety gear lifting mechanism debugging device according to any one of claims 1-6, wherein the test bench (1) is provided with a mounting frame (15), the control unit (8) comprises an electric control box body (81), the electric control box body (81) is arranged on the mounting frame (15), a PLC controller and a moment controller which are in communication connection are arranged in the electric control box body (81), the moment controller is used for controlling the first driving piece (51) and the second driving piece (71) to output moment, and a man-machine interaction interface (82) and an emergency stop switch are arranged on the electric control box body (81).

8. A method for debugging an elevator progressive safety gear lifting mechanism, characterized in that the debugging equipment of the elevator progressive safety gear lifting mechanism according to any one of claims 1-7 is adopted for debugging, and the method comprises the following steps:

s1, controlling the first driving part (51) to output lifting force, and detecting whether the displacement D1 of the driving wedge block (31) of the first safety gear (3) and the displacement D2 of the driving wedge block (31) of the second safety gear (4) exceed a specified range, wherein the first safety gear (3) is a safety gear on a speed limiter side;

s2, controlling the second driving piece (71) to output push-pull force, and judging whether a safety gap exists between the active wedge block (31) and the passive wedge block (32) and the surface of the guide rail (11) on the premise that both D1 and D2 are in a specified range;

s3, controlling the first driving piece (51) to output lifting force so as to test the primary clamping force F _{Initially, the method comprises} And judge the primary clamping force F _{Initially, the method comprises} Whether the safety condition of the clamping force of the speed limiter is met or not;

s4, controlling the first driving piece (51) to output linear lifting force, judging whether the difference value between D2 and D1 is within a preset range or not, and judging whether the gradient of the tested car frame (2) meets the requirement or not;

s5, controlling the first driving piece (51) to output lifting force and the second driving piece (71) to output downward force, and detecting whether the increment of the displacement of the tested car frame (2) is 0.

9. The method for debugging the progressive safety gear lifting mechanism of the elevator according to claim 8, wherein,

in the step S2, whether the active wedge block (31) and the passive wedge block (32) are in surface contact with the guide rail (11) is judged by comparing the change amounts of the front and rear detection values of the push-pull force detection piece (72);

in S3, when the pulling force is increased but the displacement value is not increased by any one of D1 and D2, the detected value of the pulling force detecting member (52) is the primary clamping force F _{Initially, the method comprises} 。

10. The method for adjusting the lifting mechanism of the progressive safety gear of the elevator according to claim 8, wherein in S4, the step of controlling the first driving member (51) to output the linear lifting force is sequentially as follows: