CN105905720A - Elevator no-load balance coefficient detection device based on screw pulling-up - Google Patents

Abstract

The invention provides an elevator no-load balance coefficient detection device based on a screw rod pull type, which includes an upper clamp, a lower clamp, a trapezoidal screw rod, a trapezoidal nut and a force sensor; the upper clamp is used to clamp the above the selected traction rope segment; the lower clamp is used to clamp the lower part of the selected traction rope segment; the trapezoidal wire rod can move up and down on the upper clamp; the trapezoidal The nut is sleeved on the trapezoidal screw rod and located above the upper fixture; the load cell is installed between the trapezoidal screw rod and the lower clamp for measuring the trapezoidal screw rod and the tension between the lower clamp. The present invention improves the lifting device into a screw lifting device. During use, the screw lifting device can solve the problem of poor synchronization of the load measuring device in the hydraulic system; the use of the screw lifting device can reduce the overall cost and reduce the The overall volume reduces the overall weight.

Description

A detection device for elevator no-load balance coefficient based on screw rod pulling type

technical field

The invention belongs to the technical field of elevator detection. Specifically, the invention relates to an elevator no-load balance coefficient detection device based on a screw rod pulling type.

Background technique

The balance factor is an important performance index of the traction drive elevator, which is related to the elevator's operating performance and the output power of the traction motor. From 2011 to 2013, China's annual newly installed elevators were: 450,000 units, 529,000 units, and 600,000 units, showing an increasing trend year by year. Among them, traction-type elevators accounted for more than 90%, and each new traction-type elevator is All parts should carry out the test and adjustment of the balance coefficient, and the balance coefficient index is qualified before it is allowed to be put into use. In addition, the decoration of the elevator by the user affects the change of the balance coefficient, and the balance coefficient must be re-measured. Therefore, the detection of balance coefficient is a large-volume, wide-ranging and demanding technical work in the elevator industry. However, the existing balance coefficient detection methods are cumbersome to operate, have large errors, and have more or less limitations.

The balance coefficient inspection method can be divided into a loaded inspection method and a non-loaded inspection method according to whether there is a load or not. The balance coefficient detection method and the manual cranking method of the current elevator inspection rules are load inspection methods. This type of inspection method needs to repeatedly carry weights, which is labor intensive and takes a long time to detect. The balance coefficient detection method developed by China's Anhui Provincial Special Equipment Testing Institute and the balance coefficient detection method developed by China's Liaoning Petrochemical University are no-load test methods, but there are more or less restrictions in terms of measurement accuracy and ease of installation. Difficult to apply in actual field.

Chinese invention patent ZL201210121058 provides an efficient, convenient, safe and reliable elevator balance coefficient detection technology. However, due to the reasons of ropes and pulley assemblies, there are problems such as unreliability and unbalanced load in it. In view of this, the Chinese utility model patent No. ZL201420516482.1 provides an elevator no-load balance coefficient detection device, including an upper clamp, a hydraulic cylinder, a lower clamp and a tension sensor, and the upper clamp is installed above the hydraulic cylinder , for clamping the upper part of the selected traction rope section; the hydraulic cylinder is used for lifting the lower clamp; the lower clamp is installed below the hydraulic cylinder for clamping the The lower part of the selected traction rope segment; the tension sensor is used to measure the tension of the hydraulic cylinder. The utility model adopts a hydraulic cylinder as a load measuring device, which makes full use of the characteristics of the hydraulic cylinder's working stability and reliability, so that the detection device has the advantages of simple operation and high safety performance during the operation process. At the same time, the measurement data obtained by the hydraulic cylinder is accurate. higher. However, in this method, the weight of the oil pipe is also included in the measurement of the tension sensor, which has a certain influence on the result; moreover, this method uses a pull-up type oil cylinder, which is heavy in weight, large in size and high in cost, and has a great impact on the steel wire rope section installed. There are high requirements, which limit its measurement position; separate hydraulic jacks, oil pumps, and oil pipes are bulky, heavy, and inconvenient to carry.

Contents of the invention

The object of the present invention is to provide a kind of elevator no-load balance coefficient detection device based on screw rod pulling type, to at least solve the technical problems such as unreliability and unbalanced load of the detection device in the prior art due to the reason of rope and pulley assembly, At the same time, the technical problems of heavy weight, large volume and high cost of the detection device in the prior art can be solved.

In order to solve the above problems, the present invention provides an elevator no-load balance coefficient detection device based on a screw rod pull type, and its technical scheme is as follows:

An elevator no-load balance coefficient detection device based on a screw rod pulling type, comprising an upper fixture, a lower fixture, a trapezoidal threaded screw, a trapezoidal threaded nut, and a load cell;

The upper clamp is used to clamp the top of the selected traction rope segment;

The lower clamp is used to clamp the lower part of the selected traction rope segment;

The trapezoidal threaded rod can be moved up and down on the upper fixture;

The trapezoidal nut is sleeved on the trapezoidal screw rod and located above the upper clamp;

The load cell is installed between the trapezoidal threaded rod and the lower clamp for measuring the tension between the trapezoidal threaded rod and the lower clamp.

The above-mentioned elevator no-load balance coefficient detection device based on the lifting of the screw rod is further preferably: further comprising a data acquisition and display instrument connected to the load cell for reading the tension value of the load cell, And calculate the balance coefficient value of the elevator measured.

As in the above-mentioned elevator no-load balance coefficient detection device based on screw pulling, it is further preferred that: the upper clamp includes a left upper clamp and a right upper clamp, and the upper part of the selected traction rope segment is located at the left upper clamp and between the upper right clamping block; the lower clamp includes a lower left clamping block and a lower right clamping block, and the lower part of the selected traction rope segment is located between the lower left clamping block and the lower right clamping block.

The above-mentioned elevator no-load balance coefficient detection device based on screw pulling type is further preferably: further comprising a connecting rod installed between the load cell and the lower clamp.

As the above-mentioned elevator no-load balance coefficient detection device based on screw pulling type, it is further preferred to further include a bearing, an annular groove is arranged at the upper end of the upper fixture, and the bearing is installed on the annular groove of the upper fixture. In the groove, the outer ring of the bearing is in conflicting connection with the upper fixture; the inner ring of the bearing is in contact with the trapezoidal nut; the inner diameter of the inner ring of the bearing is larger than the diameter of the trapezoidal screw rod.

As the above-mentioned elevator no-load balance coefficient detection device based on the screw rod pulling type, it is further preferred that there are two trapezoidal nuts, two bearings, two trapezoidal screw rods, and two trapezoidal nuts. There are two connecting rods, and two load cells; one set of the trapezoidal threaded rod, the connecting rod, and the load cell are installed between the left upper clamp block and the left lower clamp block , another set of the trapezoidal screw rod, the connecting rod, and the force sensor are installed between the upper right clamping block and the lower right clamping block; the two force measuring sensors are respectively used to measure the two The tension between the trapezoidal screw rod and the connecting rod.

As the above-mentioned elevator no-load balance coefficient detection device based on screw pulling type, it is further preferred that: it also includes an inner pad, and a plurality of clamping grooves matching the traction rope section are arranged on the inner pad ; A groove is provided at the center of the clamping surfaces of the upper left clamping block, the upper right clamping block, the lower left clamping block and the lower right clamping block, and the inner pads are respectively embedded in the upper left clamping block , the upper right clamping block, the lower left clamping block and the grooves of the lower right clamping block and make the clamping groove of the inner pad clamp the traction rope.

As in the above-mentioned elevator no-load balance coefficient detection device based on the lifting of the screw rod, it is further preferred that: a plurality of friction lines are provided on the groove wall of the clamping groove.

As in the above-mentioned elevator no-load balance coefficient detection device based on the screw rod pulling type, it is further preferred that: the load cell is an S-type load cell.

As the above-mentioned elevator no-load balance coefficient detection device based on screw pulling type, it is further preferably: on both sides of the left upper clamp block, the right upper clamp block, the left lower clamp block and the right lower clamp block Mounting ears are provided, and installation through holes are provided on the mounting ears, the upper left clamping block and the upper right clamping block are installed together through screw nuts, and the lower left clamping block and the lower right clamping block are installed through screw nuts together.

Analysis shows that compared with the prior art, advantages and beneficial effects of the present invention are:

1. The elevator no-load balance coefficient detection device based on the screw rod lifting type provided by the present invention improves the no-load measuring device, and the lifting device is improved into a screw rod lifting device. During use, the screw rod pulling device can Solve the problem of poor synchronization of the load measuring device of the hydraulic system; and also overcome the unreliability of the pulley of the rope assembly in the prior art; moreover, the use of the screw rod lifting device can reduce the overall cost, reduce the overall volume, and lighten the overall weight. The detection device provided by the present invention has the advantages of simple operation and high safety performance in the operation process, and at the same time, the accuracy of measurement data obtained by the screw rod pulling device is higher.

2. The data acquisition and display device provided in the present invention can realize real-time viewing of the pulling force value of the load cell and calculate the balance coefficient value of the measured elevator.

3. The upper clamp of the present invention is divided into the upper left clamp and the upper right clamp, and the lower clamp is divided into the lower left clamp and the lower right clamp, and the upper left clamp can be used for installation. The clamping block and the lower left clamping block form the left half of the clamp, and the upper right clamping block and the lower right clamping block are used to form the right half of the clamping block, so that the present invention can be divided into two wholes. When installing, directly The two parts can be installed in pairs, which saves installation time.

4. The screw pulling device of the present invention is divided into the trapezoidal screw and the trapezoidal nut, which can facilitate the operation of the screw pulling device, and can flexibly adjust the clamped screw according to the characteristics of the traction rope section. The length of the towing rope segment.

5. The bearing provided in the present invention can minimize the frictional force between the trapezoidal nut and the upper clamp.

6. The present invention is provided with mounting ears on both sides of the upper left clamping block, the upper right clamping block, the lower left clamping block and the lower right clamping block, and is provided with mounting through holes on the mounting ears, thus reducing The number of screws and nuts used is reduced, and the overall installation is also convenient.

7. The inner pad designed by the present invention and the clamping groove designed on the inner pad can increase the coefficient of friction; in addition, the inner pad is directly placed on the left upper clamp, the The volume of the inner spacer can be reduced in the upper right clamping block, the lower left clamping block and the lower left clamping block.

8. The force sensor of the present invention is an S-type force sensor, which can directly use the upper and lower installation parts of the S-type force sensor, eliminating unnecessary connectors and making the overall structure of the present invention simpler.

Description of drawings

Fig. 1 is a schematic structural diagram of an elevator no-load balance coefficient detection device based on a screw pulling type according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the upper left clamping block of the preferred embodiment of the present invention.

Fig. 3 is a schematic structural view of the inner block of the preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of the installation state of the elevator balance coefficient detection device based on the screw pulling type for detecting the car according to the present invention.

In the figure, 1-upper clamp; 11-left upper clamp; 12-right upper clamp; 2-lower clamp; 21-left lower clamp; 22-right lower clamp; 3-trapezoidal thread rod; 4-trapezoidal nut ; 5-connecting rod; 6-load sensor; 7-inner block;

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the elevator no-load balance coefficient detection device based on the screw rod pulling type of the preferred embodiment of the present invention mainly includes an upper clamp 1, a lower clamp 2, a trapezoidal screw rod 3, a trapezoidal nut 4 and a load cell 6. The upper clamp 1 is used to clamp the upper part of the selected traction rope segment; the lower clamp 2 is used to clamp the lower part of the selected traction rope segment; the trapezoidal thread rod 3 can be moved up and down on the upper On the fixture 1; the trapezoidal nut 4 is sleeved on the trapezoidal threaded rod 3 and located above the upper fixture 1; the load cell 6 is installed between the trapezoidal threaded rod 3 and the lower fixture for measuring the trapezoidal threaded rod 3 and the tension between the lower fixture 2.

In a word, the elevator no-load balance coefficient detection device based on the screw pulling type provided by the present invention can realize the no-load balance of the elevator by setting the screw pulling device (that is, the combination of the trapezoidal screw 3 and the trapezoidal nut 4). The detection of the coefficient, compared with the detection device in the prior art, the structure of the present invention is relatively simple, and the screw rod pulling device is introduced into the elevator no-load balance coefficient detection, which can reduce the weight of the entire detection device, because the screw rod The structure of the lifting device is relatively small, thereby reducing the volume of the entire detection device and reducing the cost of the entire detection device.

In order to be able to check the reading value of the load cell 6 in real time, the present invention also includes a data acquisition and display instrument (not shown), which is connected with the load cell 6 for reading the tension value of the load cell 6 and calculating the measured value. The balance factor value of the elevator. Preferably, the connection mode between the data acquisition display instrument and the load cell 6 is a wireless connection or a wired connection. Under normal circumstances, a wired connection is adopted. When it is inconvenient to use a wired connection, or when using a wireless connection has more convenient characteristics, the present invention will connect the data acquisition display instrument and the load cell 6 through a wireless connection. .

In order to make the upper clamp 1 effectively clamp the upper part of the selected traction rope segment, the upper clamp 1 includes a left upper clamp block 11 and a right upper clamp block 12, and the upper part of the selected traction rope segment is located at the left upper clamp block 11 and the right upper clamp block. Between the clamping blocks 12. Further preferably, the clamping surface of the upper left clamping block 11 and the clamping surface of the upper right clamping block 12 are cuboid structures, and the clamping surface of the upper left clamping block 11 and the clamping surface of the upper right clamping block 12 have length > height > width (in In the invention patent whose application number is CN201210121058.2 and the invention name is elevator balance coefficient detection device, the length of the clamping block > width > height); in the case of the same clamping area (that is, the height direction), materials can be saved; in the width In the case of the same direction, the clamping area can be increased.

In order to make the lower clamp 2 effectively clamp the lower portion of the selected traction rope, the lower clamp 2 includes a lower left clamping block 21 and a lower right clamping block 22, and the lower portion of the selected traction rope is located between the lower left clamping block 21 and the lower right clamping block 22. Between the lower right clamping blocks 22. Further preferably, the clamping surface of the lower left clamping block 21 and the clamping surface of the lower right clamping block 22 are cuboid structures, and the clamping surface of the lower left clamping block 21 and the clamping surface of the lower right clamping block 22 have a length > height > width (In the invention patent with the application number CN201210121058.2 and the invention name of the elevator balance coefficient detection device, the length of the clamp block > width > height); in the case of the same clamping area (ie, the height direction), materials can be saved; In the case of the same width direction, the clamping area can be increased.

In the specific work, it is necessary to consider how to make the measurement of the load cell 6 accurate. In this case, it is not convenient to install the load cell 6 directly with the lower clamp 2. Based on this, as shown in Figure 1, the present invention also It includes a connecting rod 5 installed between the load cell 6 and the lower clamp 2 . In this way, the placement of the load cell 6 can be realized through the installation of the connecting rod 5 at any time as required, without damaging the sensitivity of the load cell 6 .

In order to facilitate the setting of the present invention and meet the high requirements for the detection of the elevator no-load balance coefficient, as shown in Figure 1 and Figure 2, the present invention can realize the lifting of the lower clamp 2 by rotating the trapezoidal nut 4, and then measure The force sensor 6 can measure the tension value of the screw mandrel lifting device. The specific process is to clamp the lower part of the selected traction rope with the lower clamp 2, and clamp the upper part of the selected traction rope with the upper clamp 1. At this time, the trapezoidal nut 4 is just positioned at the upper end of the upper clamp 1 and Implement an upper positioning on the upper fixture 1. When it is necessary to measure the tension value of the screw rod lifting device, rotate the trapezoidal nut 4 to move the trapezoidal screw rod 3 upwards. In this case, it is located between the upper clamp 1 and the lower clamp. 2. The selected traction rope section between 2 is bent without force. At this time, it is sufficient to record the tension value of the load cell 6. When a data acquisition display is provided, the load cell can be directly read by the data acquisition display. 6; the pulling force value of load cell 6 can be known in real time like this. When rotating the trapezoidal nut 4, if the lower end of the trapezoidal nut 4 is directly in contact with the upper end of the upper fixture 1, it will cause difficulty in rotation and problems such as stress contact. Based on this, as shown in Figure 2, the present invention also includes a bearing (not shown), the upper end of the upper fixture 1 is provided with an annular groove, the bearing is installed in the annular groove of the upper fixture 1, the inner diameter of the inner ring of the bearing is greater than the diameter of the trapezoidal screw rod 3, the outer ring of the bearing and the upper Fixture 1 interferes with contact, makes the outer ring of bearing and upper fixture 1 rotate simultaneously or does not rotate simultaneously, the inner ring of bearing contacts with trapezoidal nut 4, makes the inner ring of bearing and trapezoidal nut 4 rotate simultaneously or does not rotate simultaneously. When the trapezoidal thread nut 4 is rotated, the inner ring of the bearing rotates with the trapezoidal thread nut 4. Since the outer diameter of the bearing inner ring is greater than the diameter of the trapezoidal thread mandrel 3, the trapezoidal thread mandrel 3 can move up and down on the bearing, and At this time, the outer ring of the bearing is in contact with the upper clamp 1 , so the lifting of the lower clamp 2 can be realized without the trapezoidal nut 4 directly contacting the upper clamp 1 . In the present invention, the bearing is preferably a combination of a thrust bearing and a deep groove bearing, which can minimize the friction between the trapezoidal nut 4 and the upper clamp 1 .

In order to accurately measure the balance coefficient when the elevator is unloaded, there are two trapezoidal nuts 4, two bearings, two trapezoidal screw rods 3, two connecting rods 5, and two load cells 6; Wherein a set of trapezoidal grain screw rod 3, connecting rod 5, load cell 6 are installed between left upper clamp block 11 and left lower clamp block 21, another set of trapezoidal grain screw rod 3, connection 5 bars, load cell 6 are installed on Between the upper right clamping block 12 and the lower right clamping block 22; two load cells 6 are respectively used to measure the tension between the two trapezoidal threaded rods 3 and the connecting rod 5.

In order to be able to fix the upper left clamping block 11 and the upper right clamping block 12 together, as shown in FIG. , the upper left clamping block 11 and the upper right clamping block 12 are fastened together, so that the upper left clamping block 11 and the upper right clamping block 12 are clamped above the selected traction rope section. Similarly, the fastening assembly also fastens the lower left clamping block 21 and the lower right clamping block 22 together, so that the lower left clamping block 21 and the lower right clamping block 22 clamp the lower part of the selected traction rope segment. Of course, the number of sets of fastening components is determined according to actual needs.

The upper clamp 1 and the lower clamp 2 of the present invention are both made of steel material. In this case, the clamping rigidity of the upper clamp 1 and the lower clamp 2 can be guaranteed. Since the traction rope is made of steel material, the upper clamp 1 and the lower clamp During the clamping process, the clamp 2 will cause damage to the traction rope, and sometimes the traction rope will be broken. In order to avoid this situation, as shown in Figure 3, the present invention also includes an inner pad 7, which The spacer 7 is provided with a plurality of clamping grooves 71 that match the traction rope; a concave groove is provided at the center of the clamping surfaces of the upper left clamping block 11, the upper right clamping block 12, the lower left clamping block 21 and the lower right clamping block 22. Groove, the inner pad 7 is respectively embedded in the grooves of the upper left clamping block 11, the upper right clamping block 12, the lower left clamping block 21 and the lower right clamping block 22, and the clamping groove 71 of the inner pad 7 clamps the traction rope . Preferably, multiple friction lines are provided on the groove wall of the clamping groove 71, which can further increase the frictional force. It is further preferred that the multiple friction lines are evenly distributed, so as to realize the uniformity and stability of the traction rope clamping. stability. Inner pad 7 of the present invention is made of polymer material, and inner pad 7 can be made of rubber material, also can be made of nylon material, as long as there is enough strength and any material that friction is big all can, will further increase like this. The frictional force of pad 7 in the big inner. The installation method of the inner spacer 7 and the upper fixture 1 and the lower fixture 2 is as follows: the inner spacer 7 is installed in the groove of the upper fixture 1 and the lower fixture 2, and when the inner spacer 7 contacts the traction rope, first The friction pattern contacts the traction rope, and the first clamping is applied; then the groove wall of the clamping groove 71 contacts the traction rope, and the second clamping is applied, and finally the traction rope is clamped by the upper and lower clamps. In an elevator no-load balance coefficient detection device with application number 201420516482.1, the friction plate is fastened to the upper and lower fixtures by passing the friction plate through the mounting holes of the friction plate through bolts, which will damage the friction plate In the present invention, the inner spacer 7 is embedded in the upper fixture 1 and the lower fixture 2, and no mounting holes are opened on the inner spacer 7, so that the structural characteristics of the inner spacer 7 do not need to be destroyed, and the inner spacer 7 is reduced. 7 Possibility of damage.

In the present invention, it is necessary to consider how to reduce the use of connectors. Based on this consideration, as shown in Figure 1, Figure 2, and Figure 3, the load cell 6 of the present invention is preferably an S-type load cell, so that the S-type load cell can be directly used. The upper and lower installation parts of the load cell save unnecessary connecting pieces, which makes the overall structure of the present invention simpler.

As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention will take a steel wire rope as an example for a specific description of the traction rope segment.

Assume that the steel wire ropes are five; by the upper left clamp block 11, the first trapezoidal nut 4, the first bearing 10, the first trapezoidal screw rod 3, the first load cell 6, the first connecting rod 5, the lower left Clamp block 21 is connected to make left half; In like manner, by upper right clamp block 12, the second trapezoidal thread nut 4, the second bearing 10, the second trapezoidal thread screw rod 3, the second load cell 6, The second connecting rod 5 and the lower right clamping block 22 are connected into the right half. During the connection process, the length of the connecting rod can be selected according to the diameter of the wire rope and the length of the installation location. According to the diameter and the number of steel wire ropes, select suitable inner pads 7, and pack in the upper left clamping block 11, the lower left clamping block 21, the upper right clamping block 12, and the lower right clamping block 22 respectively.

Place the top of the five steel wire ropes 5 between the five clamping grooves 71 of the inner pad 7 in the upper left clamping block 11 and the upper right clamping block 12; place the bottom of the five steel wire ropes 5 in the lower left clamping block 21 and the lower right clamping block 22 between the five clamping grooves 71 of the inner block 7;

Mounting ears are respectively provided on both sides of the upper left clamping block 11 and the upper right clamping block 12, and there are installation through holes (not shown) on the mounting ears of the upper left clamping block 11 and the upper right clamping block 12, and the screw rod 8 passes through the upper left clamping The mounting through holes of the mounting ears of the block 11 and the upper right clamping block 12 and use nuts to apply a fastening force to the upper left clamping block 11 and the upper right clamping block 12, and then apply clamping force to the inner pads 7 of the upper left clamping block 11 and the upper right clamping block 12 Holding force, the top of five steel wire ropes 5 is clamped; Similarly, mounting ears are respectively provided on both sides of the lower left clamping block 21 and the lower right clamping block 22, and on the mounting ears of the lower left clamping block 21 and the lower right clamping block 22 There are installation through holes (not shown), and the screw rod 8 passes through the installation through holes of the mounting ears of the lower left clamping block 21 and the lower right clamping block 22 and uses nuts to apply fastening force to the lower left clamping block 21 and the lower right clamping block 22 , and then apply a clamping force to the inner pads 7 of the lower left clamping block 21 and the lower right clamping block 22, and realize clamping below the five steel wire ropes 5;

After clamping, the trapezoidal thread nut 4 is rotated so that the trapezoidal thread rod 3 is lifted upwards, and then the lifting of the lower clamp 2 can be realized, so that the steel wire rope 5 clamped in the middle section is in a relaxed state, as shown in Figure 4, the load cell 6. Directly record and lift the weight of the elevator car 91 and the counterweight 92 to realize the measurement of the balance coefficient.

Next, the detection principle of the elevator no-load balance coefficient detection device based on the screw pulling type of the present invention will be described.

As shown in Figure 4, when the elevator balance coefficient is detected, the elevator car 91 and the counterweight 92 are successively moved to the highest level of the hoistway, and the elevator balance coefficient detection device is installed.

When the elevator car 91 is unloaded and placed on the highest floor of the hoistway and is still, the elevator balance coefficient detection device based on the screw rod pulling type of the present invention is installed. As shown in Figure 1, if the trapezoidal nut 4 is rotated at this time to realize the rise of the trapezoidal screw rod 3, the force on the wire rope will gradually decrease, and the force on the trapezoidal nut 4 will gradually increase. After the state, after the elevator car 91 stops moving, measure the car side weight G when it is static.

In the same way, the lateral weight W of the counterweight 92 at static state is obtained.

Subsequently, the weight G of the car side when the elevator is static and the weight W of the counterweight side when the elevator is static are substituted into the balance coefficient algorithm formula K=(W-G)/Q, K is the balance coefficient, W is the weight of the counterweight side, G is the side weight of the car, and Q is the rated load capacity of the elevator. Thus, the static balance coefficient K=(W-G)/Q of the elevator is obtained.

Specific detection methods include:

In the step of clamping the traction rope segment, the traction rope segment above the side of the elevator car 91 or above the side of the counterweight 92 is selected as the detection target, and the upper clamp 1 and the lower clamp 2 are used to respectively clamp the traction rope segment;

The step of the screw pulling device, the screw pulling device is installed on the upper fixture 1, and fixed on the lower fixture 2 through the load cell 6 and the connecting rod 5;

The step of reading data is to operate the trapezoidal nut 4 to lift the elevator car 91 or the counterweight 92, and measure the The pulling force value of the trapezoidal nut 4 after the lifting is finished, the car side weight G when the elevator is static or the counterweight side weight W when the elevator is static; and

In the step of calculating the balance coefficient, the weight G of the car side when the elevator is static and the weight W of the counterweight side when the elevator is static are substituted into the balance coefficient algorithm formula K=(W-G)/Q, wherein, K is the balance coefficient, and W is the balance coefficient. Heavy side weight, G is the weight of the car side, Q is the rated load capacity of the elevator, and the static balance coefficient K=(W-G)/Q of the elevator is obtained.

Accordingly, according to the present invention, it is possible to provide a no-load elevator balance coefficient detection device based on the lifting of the screw rod, which can detect the balance coefficient of the elevator in a static state in a safe, accurate and easy-to-operate manner.

Analysis shows that compared with the prior art, advantages and beneficial effects of the present invention are:

1. The elevator no-load balance coefficient detection device based on the screw rod lifting type provided by the present invention improves the no-load measuring device, and the lifting device is improved into a screw rod lifting device. During use, the screw rod pulling device can Solve the problem of poor synchronization of the load measuring device of the hydraulic system; and also overcome the unreliability of the pulley of the rope assembly in the prior art; moreover, the use of the screw rod lifting device can reduce the overall cost, reduce the overall volume, and lighten the overall weight. The detection device provided by the present invention has the advantages of simple operation and high safety performance in the operation process, and at the same time, the accuracy of measurement data obtained by the screw rod pulling device is higher.

2. The data acquisition and display device provided by the present invention can realize real-time viewing of the tension value of the load cell 6 and calculation of the balance coefficient value of the measured elevator.

3. The upper clamp 1 of the present invention is divided into a left upper clamp 11 and a right upper clamp 12, while the lower clamp 2 is divided into a left lower clamp 21 and a right lower clamp 22, and the left upper clamp 11 and the left lower clamp 21 can be used during installation To form the left half of the fixture, the right upper clamp 12 and the right lower clamp 22 are used to form the right half of the fixture, so that the present invention can be divided into two wholes. When installing, the two parts can be directly assembled, saving installation time.

4. The screw pulling device of the present invention is divided into a trapezoidal screw 3 and a trapezoidal nut 4, which can facilitate the operation of the screw pulling device, and can flexibly adjust the clamped traction according to the characteristics of the traction rope section. The length of the rope segment.

5. The bearing provided by the present invention can minimize the frictional force between the trapezoidal nut 4 and the upper clamp 1 .

Six, the present invention is provided with mounting ears on both sides of the upper left clamping block 11, the upper right clamping block 12, the lower left clamping block 21 and the lower right clamping block 22, and is provided with mounting through holes on the mounting ears, thus reducing the screw rod 8 and The number of nuts used also facilitates the overall installation.

Seven, the inner pad 7 designed by the present invention and the clamping groove 71 etc. designed on the inner pad 7 can increase the coefficient of friction; in addition, the inner pad 7 is directly placed on the upper left clamping block 11, the upper right clamping block 12, and the lower left clamping block. In the clamping block 21 and the lower right clamping block 22, the volume of the inner spacer 7 can be reduced.

Eight, load cell 6 of the present invention selects S-type load cell for use, can directly borrow the upper and lower mounting positions of S-type load cell like this, has saved unnecessary connector, makes the overall structure of the present invention simpler.

It can be known from common technical knowledge that the present invention can be realized through other embodiments without departing from its spirit or essential features. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are embraced by the present invention.

Claims (10)

1. An elevator no-load balance coefficient detection device based on screw mandrel pull-up type, is characterized in that, comprises upper clamp, lower clamp, trapezoidal pattern screw mandrel, trapezoidal pattern nut and load cell; The upper clamp is used to clamp the top of the selected traction rope segment; The lower clamp is used to clamp the lower part of the selected traction rope segment; The trapezoidal threaded rod can be moved up and down on the upper fixture; The trapezoidal nut is sleeved on the trapezoidal screw rod and located above the upper clamp; The load cell is installed between the trapezoidal threaded rod and the lower clamp for measuring the tension between the trapezoidal threaded rod and the lower clamp. 2. the elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 1, is characterized in that, also comprises: The data acquisition and display instrument is connected with the force sensor, and is used to read the tension value of the force sensor and calculate the balance coefficient value of the measured elevator. 3. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 1, characterized in that: The upper clamp includes a left upper clamp block and a right upper clamp block, and the upper part of the selected traction rope segment is located between the left upper clamp block and the right upper clamp block; The lower clamp includes a left lower clamp block and a right lower clamp block, and the lower part of the selected traction rope segment is located between the left lower clamp block and the right lower clamp block. 4. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 1 or 2, characterized in that, it also includes: The connecting rod is installed between the load cell and the lower clamp. 5. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 1 or 2, characterized in that, it also includes: A bearing is provided with an annular groove at the upper end of the upper fixture, the bearing is installed in the annular groove of the upper fixture, the outer ring of the bearing is in conflicting connection with the upper fixture; the inner ring of the bearing is in contact with the upper fixture The trapezoidal nut contacts; The inner diameter of the inner ring of the bearing is larger than the diameter of the trapezoidal screw rod. 6. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 3, characterized in that: There are two trapezoidal nuts, two trapezoidal screw rods, and two load cells; One set of the trapezoidal screw rod and the load cell are installed between the left upper clamp block and the left lower clamp block, and the other set of the trapezoidal screw rod and the load cell are installed on the Between the upper right clamping block and the lower right clamping block; the two load cells are respectively used to measure the tension between the two trapezoidal screw rods and the load cell. 7. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 3, characterized in that, it also includes: An inner pad, on which a plurality of clamping grooves matching the traction rope segment are arranged; A groove is provided at the center of the clamping surfaces of the upper left clamping block, the upper right clamping block, the lower left clamping block and the lower right clamping block, and the inner pads are respectively embedded in the upper left clamping block, The traction rope is clamped in the grooves of the upper right clamping block, the lower left clamping block and the lower right clamping block and the clamping groove of the inner pad. 8. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 7, characterized in that: A plurality of friction lines are arranged on the groove wall of the clamping groove. 9. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 1, 2 or 3, characterized in that: The load cell is an S-type load cell. 10. The elevator no-load balance coefficient detection device based on the screw rod pulling type according to claim 3, characterized in that: Mounting ears are provided on both sides of the upper left clamping block, the upper right clamping block, the lower left clamping block and the lower right clamping block, and installation through holes are provided on the mounting ears, the upper left clamping block and The upper right clamping block is installed together by a screw nut, and the lower left clamping block and the lower right clamping block are installed together by a screw nut.