阅读说明：本技术 采煤机电缆张力检测系统及其使用方法 (Coal mining machine cable tension detection system and application method thereof ) 是由 张飞 于 2021-07-03 设计创作，主要内容包括：本发明涉及一种采煤机电缆张力检测系统及其使用方法,所述系统包括拖缆装置底座、开关组件、连接件、电缆夹板和链条,开关组件固定安装在拖缆装置底座上,开关组件包括多个自复位开关,连接件的一端摆动连接在拖缆装置底座上,连接件的另一端与电缆夹板之间通过链条连接,连接件的一端还安装有金属触点,在连接件相对拖缆装置底座的摆动范围内能够达到与每一个自复位开关接触的位置上；所述方法是检测前先标定连接件摆动到的不同位置所对应的电缆张力大小和方向,检测中根据所获得的连接件的实际摆动位置转换得到对应的电缆张力大小和方向。采用本发明可有效减少供电电缆的损坏,检测精度和张力保护值可根据实际需要灵活设置。(The invention relates to a coal mining machine cable tension detection system and a use method thereof, wherein the system comprises a towing device base, a switch assembly, a connecting piece, a cable clamp plate and a chain, the switch assembly is fixedly arranged on the towing device base and comprises a plurality of self-resetting switches, one end of the connecting piece is connected to the towing device base in a swinging mode, the other end of the connecting piece is connected with the cable clamp plate through the chain, one end of the connecting piece is also provided with a metal contact, and the metal contact can reach the position contacted with each self-resetting switch in the swinging range of the connecting piece relative to the towing device base; the method comprises the steps of calibrating the magnitude and the direction of the cable tension corresponding to different positions where the connecting piece swings before detection, and converting according to the obtained actual swinging position of the connecting piece in the detection to obtain the magnitude and the direction of the corresponding cable tension. The invention can effectively reduce the damage of the power supply cable, and the detection precision and the tension protection value can be flexibly set according to the actual requirement.)

1. The utility model provides a coal-winning machine cable tension detecting system which characterized in that: including towline device base, switch module, connecting piece, cable clamp and chain, switch module fixed mounting is on towline device base, be equipped with a plurality of from reset switch on the switch module, each corresponds one from reset switch return circuit from reset switch, all from reset switch return circuits and same data acquisition module electrical connection, the one end swing of connecting piece is connected on towline device base, the other end of connecting piece is articulated with the one end of chain, the other end and the cable clamp of chain are articulated, the metal contact is still installed to the one end of connecting piece the swing within range of the relative towline device base of connecting piece can reach and on each position from reset switch contact.

2. The shearer cable tension detection system of claim 1, wherein: the button of the self-reset switch is hemispherical, and the button protrudes out of the large end face of the switch assembly, which faces the connecting piece.

3. The shearer cable tension detection system of claim 1, wherein: the metal contact is vertically arranged on the large end face, facing the switch component, of one end of the connecting piece, and the top end of the metal contact is hemispherical.

4. The shearer cable tension detection system of claim 1, wherein: two groups of chains are connected between the connecting piece and the cable clamp plate in parallel.

5. The shearer cable tension detection system of claim 1, 2, 3, or 4, wherein: the switch assembly and the connecting piece are sleeved on the same connecting shaft, the connecting shaft is fixed on the towing device base, and the self-reset switches are distributed on the circumference coaxial with the connecting shaft.

6. The shearer cable tension detection system of claim 5, wherein: and when the self-reset switch is installed on a coal mining machine, the connecting shaft horizontally extends from front to back, and the self-reset switches are symmetrically arranged on the large end surface of the switch assembly from left to right.

7. The shearer cable tension detection system of claim 6, wherein: the coal mining machine main control module is further included, and the data acquisition module is electrically connected with the coal mining machine main control module.

8. The use method of the cable tension detection system of the coal mining machine as claimed in any one of claims 1 to 7, characterized in that: before detection, the sizes and the directions of the cable tensions corresponding to different positions where the connecting piece swings are calibrated, and corresponding data of the cable tensions are obtained through conversion according to the obtained actual swinging position of the connecting piece in the detection.

9. The method of using the shearer cable tension detection system of claim 8, wherein: and the position of the connecting piece when the connecting piece is vertical to the horizontal ground is used as a dividing point of the positive and negative angles during calibration.

10. The method of using the shearer cable tension detection system of claim 9, wherein: and defining the cable tension corresponding to each position to which the connecting piece swings as a cable tension protection value corresponding to the position, judging that the cable tension reaches the cable tension protection value corresponding to the set position and is too large after the connecting piece swings to the set position and is maintained for N seconds, and judging that the cable tension does not reach the cable tension protection value corresponding to the set position if the connecting piece swings to the set position and is maintained for less than N seconds.

Technical Field

The invention relates to a system or a device for detecting the cable tension of a coal mining machine and a using method thereof, belonging to the field of cable tension detection.

Background

With the application of the automation technology to the coal mining machine, a plurality of sensing detection systems are added to the coal mining machine to detect the working condition of the coal mining machine, and a cable tension detection system is one of the sensing detection systems. The cable tension detection system is used for detecting the stress condition of the power supply cable in the walking process of the coal mining machine, preventing the power supply cable and a connecting shaft of the cable towing device from being broken, and further ensuring the safety and the production efficiency of the coal mining working face.

In the conventional coal mining machine cable tension detection system, when a connecting shaft of a towing device is subjected to overlarge tension of a power supply cable, the connecting shaft can be broken, a coal mining machine cable tension sensor arranged adjacent to the connecting shaft is triggered at the moment, and a coal mining machine electric control system controls a pilot circuit to be disconnected and shut down after acquiring a trigger signal of the cable tension sensor, so that the purpose of protecting the power supply cable is achieved. The principle of the mode is simple, but the towing device or the connecting shaft needs to be replaced every time the mode is generated, the workload and the production cost of workers are increased, and the production efficiency is influenced.

Disclosure of Invention

The invention aims to provide a coal mining machine cable tension detection system and a use method thereof, the detection principle is simple, the damage of a power supply cable can be effectively reduced, and the detection precision and the tension protection value can be flexibly set according to actual needs.

The main technical scheme of the invention is as follows:

the utility model provides a coal-winning machine cable tension detecting system, includes towline device base, switch module, connecting piece, cable clamp and chain, switch module fixed mounting is on towline device base, the last a plurality of from reset switch that are equipped with of switch module, each corresponds a from reset switch return circuit from reset switch, all from reset switch return circuits and same data acquisition module electrical connection, the one end swing of connecting piece is connected on towline device base, the other end of connecting piece is articulated with the one end of chain, the other end and the cable clamp of chain are articulated, the metal contact is still installed to the one end of connecting piece the swing within range of the relative towline device base of connecting piece can reach with each from the position of reset switch contact.

The button of the self-reset switch is hemispherical, and the button protrudes out of the large end face of the switch assembly, which faces the connecting piece.

The metal contact is vertically arranged on the large end face, facing the switch component, of one end of the connecting piece, and the top end of the metal contact is hemispherical.

Two groups of chains are connected between the connecting piece and the cable clamp plate in parallel.

The switch assembly and the connecting piece are sleeved on the same connecting shaft, the connecting shaft is fixed on the towing device base, and the self-reset switches are distributed on the circumference coaxial with the connecting shaft.

And when the self-reset switch is installed on a coal mining machine, the connecting shaft horizontally extends from front to back, and the self-reset switches are symmetrically arranged on the large end surface of the switch assembly from left to right.

The coal mining machine cable tension detection system further comprises a coal mining machine main control module, and the data acquisition module is electrically connected with the coal mining machine main control module.

The application method of the coal mining machine cable tension detection system is characterized in that: before detection, the sizes and the directions of the cable tensions corresponding to different positions where the connecting piece swings are calibrated, and corresponding data of the cable tensions are obtained through conversion according to the obtained actual swinging position of the connecting piece in the detection.

And the position of the connecting piece when the connecting piece is vertical to the horizontal ground is used as a dividing point of the positive and negative angles during calibration.

And defining the cable tension corresponding to each position to which the connecting piece swings as a cable tension protection value corresponding to the position, judging that the cable tension reaches the cable tension protection value corresponding to the set position and is too large after the connecting piece swings to the set position and is maintained for N seconds, and judging that the cable tension does not reach the cable tension protection value corresponding to the set position if the connecting piece swings to the set position and is maintained for less than N seconds.

The invention has the beneficial effects that:

the invention has simple detection principle, simple structure and easy reliability guarantee.

The invention can reduce the damage of the power supply cable and the connecting shaft of the coal mining machine, thereby saving the cost and improving the safety.

The detection precision of the cable tension protection device can be changed by changing the number of the self-reset switches, and the cable tension protection value of the cable tension protection device can be changed by changing the setting positions of the self-reset switches, so that the main technical parameters of the cable tension protection device can be conveniently adjusted according to actual needs.

Drawings

FIG. 1 is a schematic illustration of the mechanical component connections of one embodiment of the shearer cable tension detection system of the present invention;

FIG. 2 is a schematic diagram of the electrical connections of the shearer cable tension detection system of the present invention;

FIG. 3 is an elevation view of a switch assembly in the shearer cable tension detection system of the present invention;

FIG. 4 is a schematic view of the connection of one embodiment of the shearer cable tension detection system of the present invention when undeflected;

FIG. 5 is a schematic view of a connection of one embodiment of the shearer cable tension detection system of the present invention as it is deflected to the left (coal wall facing side);

fig. 6 is a schematic view of a connector of one embodiment of the shearer cable tension detection system of the present invention as it deflects to the right (coal wall facing side).

Reference numerals: 1. the cable towing device comprises a connecting shaft, 1-1 parts, fastening parts, 1-2 parts, fastening parts, 1-4 parts, a towing device base, 2 parts, a connecting piece, 2-1 parts, metal contacts, 2-2 parts, the lower part of the connecting piece, 2-3 parts, a pin shaft, 2-4 parts, a pin shaft, 2-5 parts, an iron chain, 2-6 parts, a chain, 2-7 parts, a pin shaft, 2-8 parts, a pin shaft, 2-9 parts, a cable clamp plate, 2-10 parts, the upper part of the connecting piece, 3 parts, a switch component, 3-1 parts, a self-reset switch, 3-2 parts, a self-reset switch, 3-3 parts, a self-reset switch, 3-4 parts, a self-reset switch, 3-5 parts, a data acquisition module, 6 parts and a coal mining machine main control module.

Detailed Description

The invention discloses a coal mining machine cable tension detection system, which comprises a towing device base 1-4, a switch assembly 3, a connecting piece 2, cable clamping plates 2-9 and chains 2-6, wherein the switch assembly is fixedly arranged on the towing device base, a plurality of self-reset switches (such as 3-1, 3-2, 3-3, 3-4 and 3-5 in the embodiment) are arranged on the switch assembly, each self-reset switch corresponds to one self-reset switch loop, and all the self-reset switch loops are electrically connected with the same data acquisition module 5. One end of the connecting piece 2 is connected to the base of the towing device in a swinging mode, the other end of the connecting piece is hinged to one end of the chain, and the other end of the chain is hinged to the cable clamping plate. One end of the connecting piece is also provided with a metal contact 2-1, and the connecting piece can reach a position contacted with each self-reset switch in a swinging range relative to the base of the towing device. Under the traction of a cable of the coal mining machine, the connecting piece can swing relative to the base of the towing device, when the metal contact is in contact with a certain self-resetting switch, the corresponding self-resetting switch circuit is switched on, namely the swinging position of the connecting piece and the switching-on of the self-resetting switch circuit have a one-to-one correspondence relationship, so that the swinging position signal of the connecting piece can be detected through the self-resetting switch. The data acquisition module collects the on-off state of each self-reset switch loop to serve as basic information for further judging the swing position of the connecting piece.

The button of the self-reset switch is hemispherical, and the button protrudes out of the large end face of the switch assembly, which faces the connecting piece.

The metal contact is vertically arranged on the large end face, facing the switch component, of one end of the connecting piece, and the top end of the metal contact is hemispherical.

Two groups of chains 2-5 and 2-6 are connected in parallel between the connecting piece and the cable clamp plate. Two ends of the chain 2-5 are hinged with the other end of the connecting piece and the cable clamping plate through pin shafts 2-4 and 2-8 respectively, and two ends of the chain 2-6 are hinged with the other end of the connecting piece and the cable clamping plate through pin shafts 2-3 and 2-7 respectively.

The switch assembly and the connecting piece are sleeved on the same connecting shaft 1, and the connecting shaft is fixed on the base of the towing device through fasteners 1-3. The switch assembly is fixed on the connecting shaft by fasteners 1-2 and 1-3. One end of the connecting piece is axially limited on the connecting shaft through the fastening pieces 1-1 and 1-2 positioned on the two sides of the connecting piece. The self-reset switches are distributed on the circumference coaxial with the connecting shaft.

Under the state of being installed on a coal mining machine, the towing device base 1-4 is installed on a box body 4 of the coal mining machine, and the connecting shaft horizontally extends forwards and backwards. The connecting shaft is positioned behind the towing device base, and the switch assembly is closer to the body of the coal mining machine than the connecting piece. The self-reset switches are arranged on the large end face of the rear side of the switch assembly in a left-right symmetrical mode. The upper part of the connecting piece is sleeved on the connecting shaft, the lower part 2-2 of the connecting piece naturally droops under the condition that the connecting piece is not pulled by the cable, the metal contact 2-1 is contacted with the self-reset switch 3-1 at the lowest end of the switch assembly, and the stress of the power supply cable can be determined to be zero according to the specification, as shown in figures 1 and 4. Under the pulling of the cable, the connecting piece can swing left and right around the connecting shaft, and when the swinging direction and the angle of the connecting piece are different, different self-reset switch circuits are in a conducting state.

The more the number of the self-reset switches is, the smaller the interval angle is, and the higher the detection precision of the coal mining machine cable tension detection system is. The switch assembly can be provided with self-reset switches with different numbers and different angle intervals according to actual needs.

The coal mining machine cable tension detection system further comprises a coal mining machine main control module 6, and the data acquisition module 5 is electrically connected with the coal mining machine main control module 6, so that the coal mining machine main control module can master the on-off state of the self-reset switch loop in real time and execute further control operation according to the on-off state.

The application method of the coal mining machine cable tension detection system comprises the following steps: before detection, the sizes and the directions of the cable tensions corresponding to different positions where the connecting piece swings are calibrated, and corresponding data of the cable tensions are obtained through conversion according to the obtained actual swinging position of the connecting piece during detection. The system and the method can detect the tension of the cables in different gears as early as possible before the extreme state that the connecting shaft is pulled off is reached, and can intervene timely when necessary to avoid pulling off the connecting shaft.

The different positions that the connecting piece can swing to correspond to the positions of the self-reset switches one by one, when the connecting piece is subjected to different pulling forces of the power supply cable, the swinging angles of the connecting piece are different, and when the running directions of the coal mining machine are different, the swinging directions of the connecting piece are also different. The position to which the connecting piece swings is determined according to which self-resetting switch the metal contact contacts so as to lead the corresponding self-resetting switch loop to be conducted.

And the position of the connecting piece when the connecting piece is vertical to the horizontal ground is used as a dividing point of the positive and negative angles during calibration. And calibrating the connecting piece to swing in the forward direction when the coal mining machine walks to the right side, and calibrating the connecting piece to swing in the reverse direction when the coal mining machine walks to the left side. As shown in fig. 5, when the coal mining machine travels to the right, and the coal mining machine cable tension detection system is used for detecting the stress condition of the power supply cable of the coal mining machine, the connecting piece swings to the left under the dragging of the power supply cable, the metal contact 2-1 is in contact with the self-reset switch 3-4, so that the corresponding self-reset switch loop is conducted, and the stress of the power supply cable at the moment can be determined according to the calibration result. As shown in fig. 6, when the coal mining machine travels leftwards, and the coal mining machine cable tension detection system is used for detecting the stress condition of the power supply cable of the coal mining machine, the connecting piece swings rightwards under the dragging of the power supply cable, the metal contact 2-1 is in contact with the self-reset switch 3-3, so that the corresponding self-reset switch loop is conducted, and the stress of the power supply cable at the moment can be determined according to the calibration result.

Further, the cable tension corresponding to each position to which the connecting piece swings is defined as a cable tension protection value corresponding to the position, and when the connecting piece swings to a set position and is maintained for N seconds, the connecting piece judges that the cable tension reaches the cable tension protection value corresponding to the set position and the tension is too large, and at the moment, the coal mining machine can be controlled to stop, so that the coal mining machine cannot stop when the connecting shaft is broken; and if the connecting piece swings to the set position and is maintained for less than N seconds, the cable tension is judged not to reach the cable tension protection value corresponding to the set position. The size of N can be changed according to the actual situation, and the method can prevent misjudgment, so that the shutdown protection of the coal mining machine caused by the misjudgment is avoided.

The invention relates to a cable tension detection system for a coal mining machine, which is used for detecting the switching value, has simple principle, can effectively reduce the damage times of a power supply cable and a connecting shaft, saves the cost and improves the safety.

The front and back, left and right, up and down are all the directions under the condition that the cable tension detection system of the coal mining machine is installed on the coal mining machine and the view angle of an observer facing to the coal wall is observed.