WO2022022056A1

WO2022022056A1 - Light electric support for coal mine

Info

Publication number: WO2022022056A1
Application number: PCT/CN2021/097772
Authority: WO
Inventors: 王洪磊; 王海军; 赵建; 杨晓辉; 孟建新; 刘少权; 任道远; 陶伟忠; 龚青
Original assignee: 煤炭科学研究总院
Priority date: 2020-07-29
Filing date: 2021-06-01
Publication date: 2022-02-03
Also published as: CN111946378A; CN111946378B

Abstract

A light electric support for a coal mine, comprising: a pushing device (100), used for driving the light electric support for a coal mine to move; a top beam (200) that can be lifted or lowered with respect to the ground, wherein a plurality of recesses filled with a high polymer material are formed in the top beam (200); and a supporting framework (300) comprising two supporting frames arranged side by side, each supporting frame comprising: a base plate (301); a telescopic driving device (302), one end of the driving device (302) being pivotably connected to the base plate (301), and the other end of the driving device (302) being pivotably connected to the top beam (200); a shield beam (303) pivotably connected to the top beam (200); and a connecting rod (304), one end of the connecting rod (304) being pivotably connected to the shield beam (303) and the other end being pivotably connected to the bottom plate (301).

Description

A kind of light electric support for coal mine

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese Patent Application No. "202010742387.3" filed by the General Research Institute of Coal Science on July 29, 2020, with the invention titled "A Lightweight Electric Bracket for Coal Mine".

technical field

The present application relates to the technical field of automation control, in particular to a light-duty electric support for coal mines.

Background technique

At present, in the process of coal mining, due to space constraints, it is difficult for people to enter the working face, so the support needs to complete the relevant actions independently, so as to cooperate with the shearer to realize the automatic coal mining of the working face.

However, in order to ensure sufficient support strength, the top beam, cover beam and bottom plate of the existing hydraulic support are made of thicker steel plates, which makes the overall weight of the support heavier, resulting in a large frictional resistance during the moving process of the support, and further As a result, there is a delay in the action response of the bracket, and the control accuracy of the hydraulic cylinder cannot be effectively guaranteed, and it is urgent to improve the existing bracket structure.

SUMMARY OF THE INVENTION

The present application aims to solve one of the technical problems in the related art at least to a certain extent.

Therefore, the purpose of this application is to propose a light-weight electric support for coal mines, which can reduce the weight of the support, realize the purpose of light-weight design, effectively ensure the accuracy and real-time performance of control, and improve the use experience.

In order to achieve the above purpose, an embodiment of the present application provides a light-duty electric support for coal mines, including:

a pushing device, the pushing device is used to drive the light electric support for coal mine to travel;

a roof beam, the roof beam can be lifted and lowered relative to the ground, wherein the roof beam is provided with a plurality of grooves filled with polymer materials;

A support frame, the support frame includes two sets of support frames arranged side by side, and each group of the support frames includes:

bottom plate;

a driving device, wherein the driving device is telescopic, one end of the driving device is pivotally connected to the bottom plate, and the other end of the driving device is pivotally connected to the top beam;

a shield beam, the shield beam and the top beam are pivotally connected;

A connecting rod, one end of the connecting rod is pivotally connected with the shield beam and the other end is pivotally connected with the bottom plate.

According to the light-duty electric support for coal mines according to the embodiments of the present application, by designing a frame-shaped support frame, and the top beam is provided with a plurality of grooves filled with polymer materials for reducing the friction coefficient and reducing the weight, the weight of the support is reduced, To achieve the purpose of lightweight design, and effectively ensure the accuracy and real-time control of the control, improve the user experience.

In addition, the light-duty electric support for coal mines according to the above embodiments of the present application may also have the following additional technical features:

Optionally, in an embodiment of the present application, in each group of the support brackets, the connecting rods include a plurality of sub-connecting rods spaced apart along the traveling direction of the bottom plate, and two ends of the sub-connecting rods are respectively connected with each other. The shield beam and the base plate are pivotally connected.

Optionally, in an embodiment of the present application, the sub-connecting rod adjacent to the driving device is a bent rod structure.

Optionally, in an embodiment of the present application, the sub-connecting rod away from the driving device is a straight rod structure.

Optionally, in an embodiment of the present application, two ends of the sub-connecting rod far from the driving device are respectively connected to the ends of the bottom plate and the shield beam.

Optionally, in an embodiment of the present application, the driving device includes:

the first support cylinder;

A first oil supply device and a first oil cylinder, the first oil supply device and the first oil cylinder are coaxially arranged and arranged on the outer side of the first support oil cylinder.

Optionally, in an embodiment of the present application, it also includes:

An electric balance rod, one end of the electric balance rod is pivotally connected to the top beam, and the other end of the electric balance rod is pivotally connected to the sub-connecting rod adjacent to the driving device.

The second support cylinder;

A second oil supply device and a second oil cylinder, the second oil supply device and the second oil cylinder are coaxially arranged and arranged on the outer side of the second support oil cylinder.

Optionally, in an embodiment of the present application, the plurality of grooves are arranged in a honeycomb shape.

Optionally, in an embodiment of the present application, the depth of each groove of the plurality of grooves is a preset value, or the depth of the plurality of grooves follows the side of the shield beam along the other side. Decrease settings in a gradient.

Additional aspects and advantages of the present application will be set forth, in part, in the following description, and in part will be apparent from the following description, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a hydraulic support for coal mines in the related art;

2 is a schematic structural diagram of a light-duty electric support for coal mines provided according to an embodiment of the present application;

3 is a schematic top view of the upper surface of the top beam of a light-duty electric support for coal mines provided according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the overall effect of a light-duty electric support for coal mines provided according to an embodiment of the present application.

detailed description

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.

Before describing the light-duty electric support for coal mines according to the embodiments of the present application, the defects of the prior art will be briefly described below.

In the related art, as shown in Figure 1, the existing hydraulic supports for coal mines mostly use a large-flow emulsion pump station + hydraulic cylinder as the action actuator, and use the expansion and contraction of the oil cylinder to realize the functions of the support such as lowering, moving, lifting, and pushing.

However, in order to ensure sufficient support strength, the top beam, cover beam and bottom plate of the existing hydraulic support are made of thicker steel plates, which makes the overall weight of the support heavy, usually more than 10t, which leads to friction during the pushing process of the support. The resistance is relatively large, especially the moving distance of the bracket and the lifting attitude control are mostly controlled by electro-hydraulic valves. Due to the large flow of emulsion in the valve control system circulation process, there is a certain hysteresis, resulting in a delay in the action response of the bracket, which cannot be Effectively ensure the control accuracy of the hydraulic cylinder. For example, the hydraulic support in the existing control technology needs more than 12s to automatically complete a process of pushing and pulling the frame, and the deviation of the pushing distance exceeds 10cm. That is to say, using the servo electric cylinder to control the posture and push-pull displacement of the hydraulic support, although the pushing speed and control accuracy can be greatly improved, the pushing and supporting resistance cannot be too large, and the existing support structure needs to be improved urgently.

Based on the above problem, the present application proposes a light-duty electric support for coal mines.

The light-duty electric support for coal mines proposed according to the embodiments of the present application will be described below with reference to the accompanying drawings.

Specifically, FIG. 2 is a schematic structural diagram of a light-duty electric support for coal mines provided by an embodiment of the application.

As shown in FIG. 2 , the light-duty electric support for coal mine includes: a pushing device 100 , a top beam 200 and a supporting frame 300 (not specifically identified in the figure). Wherein, each group of support frames of the support frame 300 includes: a bottom plate 301 , a driving device 302 , a shield beam 303 , and a connecting rod 304 .

Specifically, the pushing device 100 is used to drive the light-duty electric support for coal mines to travel.

In some examples, the pushing device 100 may, but is not limited to, drive the light-duty electric support for coal mines to travel. For example, when the support needs to complete the forward or backward action autonomously, the pushing device 100 pushes the support to move, so as to ensure the working efficiency and control accuracy of the pushing support.

The roof beam 200, the roof beam 200 can be raised and lowered relative to the ground, wherein the roof beam 200 is provided with a plurality of grooves filled with polymer materials.

In some examples, compared to the roof beam arrangement in the prior art, the roof beam 200 of the embodiment of the present application is a light-weight roof beam due to the groove design used to fill the friction coefficient and reduce the weight (will be described in detail below) , the top beam 200 is set to be liftable relative to the ground, so as to effectively meet the requirements of light-duty supports for coal mines, improve the applicability and practicability of the supports, and ensure the working efficiency and reliability of coal seam mining, which is simple, convenient, and easy to implement.

The support frame 300 includes two sets of support frames arranged side by side.

It can be understood that, in order to solve the technical problem that the overall weight of the bracket is relatively heavy in the related art, the embodiment of the present application designs a frame-shaped support frame, which reduces the weight and has a lightweight design, so as to realize a practical improvement to the structure of the bracket, not only to reduce the movement of the bracket, The frictional resistance of the process can effectively ensure the control accuracy, and ensure the functionality of the bracket, which is simple and easy to implement.

Among them, as shown in Figure 2, each group of support frames includes:

The driving device 302 is retractable and one end of the driving device 302 is pivotally connected to the bottom plate 301 , and the other end of the driving device 302 is pivotally connected to the top beam 200 .

For example, the driving device 302 is a supporting column, and the length can be controlled by the built-in telescopic columns. While the bottom plate 301 is used to support the top beam 200 fixedly, the height and/or the inclination angle of the top beam 200 can be adjusted. Purpose.

The shield beam 303 is pivotally connected to the top beam 200 .

It can be understood that the shield beam 303 can transmit part of the roof pressure of the top beam 200 to the base through the connecting rod or the junction point. Another example is that the shield beam 303 can be provided with a movable side shield to further improve the above-mentioned functions. Connect and cover functions.

And it can withstand the pressure of the gangue falling from the goaf, and transmit it to the top beam, the following connecting rod and the base, that is, the bottom plate 301 .

Specifically, the role of the shield beam 303 is:

1) Bear the horizontal component force and lateral force given by the top plate, and enhance the torsion resistance of the bracket;

2) The shield beam forms a four-link mechanism with the front and rear connecting rods and the base to ensure that the end distance of the beam does not change much;

3) Bear the pressure given by the gangue in the old pond, so that the column is free from the load of lateral bending, block the coal and gangue from the rear, and maintain the working space.

A connecting rod 304 , one end of the connecting rod 304 is pivotally connected to the shield beam 303 and the other end is pivotally connected to the bottom plate 301 .

Optionally, in an embodiment of the present application, as shown in FIG. 2 , in each group of support frames, the connecting rod 304 may include a plurality of sub-connecting rods spaced apart along the traveling direction of the bottom plate 301 , and both ends of the sub-connecting rods may be The shield beam 303 and the bottom plate 201 are pivotally connected respectively, and the sub-connecting rods adjacent to the driving device 302 can be bent rod structures, and the sub-connecting rods far away from the driving device 302 can be straight rod structures, and the sub-connecting rods remote from the driving device 302 can be in a straight rod structure. Two ends of the connecting rod can be connected to the bottom plate 301 and the end of the shield beam 303 respectively.

It can be understood that the connecting rod 304 is used to realize the movement law during coal mining. For example, when the motion law of the active rod is constant, the driven rod moves accordingly according to the given motion law to achieve a certain trajectory and realize coal mining. Common connecting rod mechanisms include: crank-rocker mechanism, double-crank mechanism, double-crank mechanism The rocker mechanism, the four-bar mechanism of the suspending block, the multi-bar mechanism, etc., the connecting rods in FIG. 2 are only schematic, and the present application is not limited to this connection method.

Based on the description of the above-mentioned related embodiments, it can be understood that, all the execution actions of the bracket in the embodiment of the present application can be completed by the motor drive control, without the need for external hydraulic oil pipes, which not only effectively improves the control accuracy, but also reduces the bracket weight, more Convenient automation.

Optionally, in an embodiment of the present application, the driving device 302 includes: a first support oil cylinder, a first oil supply device and a first oil cylinder.

Wherein, the first oil supply device and the first oil cylinder are arranged coaxially and then arranged on the outer side of the first support oil cylinder.

Optionally, in an embodiment of the present application, the driving device includes: a second support oil cylinder, a second oil supply device and a second oil cylinder.

Wherein, the second oil supply device and the second oil cylinder are arranged coaxially and then arranged on the outer side of the second support oil cylinder.

Specifically, in the actual execution process, a separate oil supply device can be provided outside the driving device 302. For example, a high-speed motor drives an oil pump to realize the oil supply by lifting the column, which not only reduces the space ratio of the oil supply device, but also reduces the oil supply device. It is designed to be replaced on the outside of the support cylinder coaxially with the oil cylinder, which is not specifically limited here, and can effectively meet the functional requirements of the bracket while ensuring sufficient support strength.

Optionally, in an embodiment of the present application, the light electric support for coal mines in the embodiment of the present application further includes: an electric balance bar 400 .

One end of the electric balance bar 400 is pivotally connected to the top beam 200 , and the other end of the electric balance bar 400 is pivotally connected to the sub-connecting bar adjacent to the driving device 302 .

For example, the electric balance bar 400 may be an electric balance device, for example, it may reduce the roll of the bracket and/or achieve the effect of force transmission during the action.

The light roof beam is explained in detail here. It should be understood by those skilled in the art that, in order to further solve the problem that the overall weight of the bracket in the related art is relatively heavy, and to achieve the purpose of the light-weight concept, the embodiment of the present application further implements a hollow design for the top beam 200 . In some examples, as shown in FIG. 3 , in order to reduce the weight of the bracket and reduce the power and volume of the electric drive device, the top beam 200 of the bracket adopts a special hollow design, and the middle is filled with light polymer materials such as carbon fiber materials, so as to meet the support requirements. At the same time of strength, the friction coefficient between the bracket and the coal wall is reduced, which not only meets the requirements of the working face, but also the overall weight of the bracket is light, the friction resistance is small, and the moving speed and control accuracy are effectively improved.

For example, compared with the prior art, after the groove filled with carbon fiber material is provided, due to the characteristics of high temperature resistance, friction resistance, electrical conductivity, heat conduction and corrosion resistance of carbon fiber, and the density of carbon fiber is small, the specific strength and The specific modulus is high, and through the structural characteristics of the arrangement of carbon atoms, the support of the embodiment of the present application can further reduce the friction coefficient while ensuring the support strength, which is beneficial to the transportation of coal, and effectively reduces the friction resistance in the process of moving the pull frame, Effectively cooperate with the shearer to realize automatic coal mining at the working face, and at the same time improve the flexibility and functionality of the support to ensure the coal mining efficiency.

Although the above part takes carbon fiber as an example, those skilled in the art should understand that for materials that can reduce the friction coefficient, or reduce the weight, or both can reduce the friction coefficient and reduce the weight while ensuring the strength All are within the protection scope of the present application, and no specific limitation is made here.

It should be noted that the above-mentioned hollow design may be, but is not limited to, a honeycomb design, and the number or arrangement of the weight-reducing holes may be designed by those skilled in the art according to the actual situation, which is not specifically limited here.

Optionally, in another embodiment of the present application, the depth of each groove of the plurality of grooves is a preset value, or the depth of the plurality of grooves is a gradient along one side of the shield beam along the other side. Reduce settings.

In the embodiment of the present application, the depth of the groove can be a fixed value set by those skilled in the art according to the actual situation as shown in the figure, but the figure is only for the purpose of example, and the depth is not limited to this. According to the experience of technicians or experimental settings, the optimal depth arrangement scheme of grooves can be obtained to ensure that the top beam is the lightest, while reducing the friction coefficient and effectively reducing friction resistance.

In addition, as shown in FIG. 4, the space grid structure design method adopted between the shield beam 303, the electric balance bar 400, the connecting rod 304 and the bottom plate 301 can use the finite element analysis software to optimize the position of the hinge point and the shape of the connecting rod Analysis, so as to accurately obtain the optimal hinge position and the optimal value of the thickness of the connecting rod, so as to ensure the stable support of the bracket and the lightest structural weight of the bracket.

To sum up, when the bracket of the embodiment of the present application is moving, the pushing device 100 can adopt the working principle of an electric screw, and drive the screw to rotate rapidly through a high-speed motor, so as to achieve the purpose of fast and accurate movement of the bracket, and effectively reduce the weight of the bracket, When the thrust of the electric screw is limited in a limited space, the bracket can control its frictional resistance to the surrounding environment within a certain range during the dragging process, so as to ensure the moving speed and control accuracy, and the top beam is provided with padding. There are multiple grooves of polymer material used to reduce the friction coefficient and reduce the weight, thereby solving the technical problems in the related art, such as the fact that the overall weight of the bracket is heavy, the control accuracy cannot be effectively guaranteed, and the deviation of the moving distance is large. .

According to the light-weight electric support for coal mines according to the embodiments of the present application, by designing a frame-shaped support frame, the weight of the support is reduced, the purpose of light-weight design is achieved, and the control accuracy and real-time performance are effectively ensured, and the use experience is improved.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or N of the embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without contradicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "N" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Claims

A light-duty electric support for coal mines, characterized in that it includes:

a pushing device, the pushing device is used to drive the light electric support for coal mine to travel;

a roof beam, the roof beam can be lifted and lowered relative to the ground, wherein the roof beam is provided with a plurality of grooves filled with polymer materials;

A support frame, the support frame includes two sets of support frames arranged side by side, and each group of the support frames includes:

bottom plate;

a driving device, wherein the driving device is telescopic, one end of the driving device is pivotally connected to the bottom plate, and the other end of the driving device is pivotally connected to the top beam;

a shield beam, the shield beam and the top beam are pivotally connected;

A connecting rod, one end of the connecting rod is pivotally connected with the shield beam and the other end is pivotally connected with the bottom plate.
The light-duty electric support for coal mines according to claim 1, wherein in each group of the support frames, the connecting rods comprise a plurality of sub-connecting rods spaced apart along the traveling direction of the bottom plate, and the connecting rods of the sub-connecting rods are Both ends are pivotally connected to the shield beam and the bottom plate respectively.
The light-duty electric support for coal mines according to claim 2, wherein the sub-connecting rod adjacent to the driving device is a bending rod structure.
The light-duty electric support for coal mines according to claim 2 or 3, characterized in that, the sub-connecting rod away from the driving device is a straight rod structure.
The light-duty electric support for coal mines according to any one of claims 2 to 4, wherein the two ends of the sub-connecting rod far from the driving device are respectively connected to the ends of the bottom plate and the shield beam Department.
The light-duty electric support for coal mines according to any one of claims 1 to 5, wherein the driving device comprises:

the first support cylinder;

A first oil supply device and a first oil cylinder, the first oil supply device and the first oil cylinder are coaxially arranged and arranged on the outer side of the first support oil cylinder.
The light-duty electric support for coal mines according to any one of claims 1 to 6, further comprising:

An electric balance rod, one end of the electric balance rod is pivotally connected to the top beam, and the other end of the electric balance rod is pivotally connected to the sub-connecting rod adjacent to the driving device.
The light-duty electric support for coal mines according to claim 7, wherein the driving device comprises:

The second support cylinder;

A second oil supply device and a second oil cylinder, the second oil supply device and the second oil cylinder are coaxially arranged and arranged on the outer side of the second support oil cylinder.
The light-duty electric support for coal mines according to any one of claims 1 to 8, wherein the plurality of grooves are arranged in a honeycomb shape.
The light-duty electric support for coal mines according to any one of claims 1 to 9, wherein the depth of each groove of the plurality of grooves is a preset value, or the depth of the plurality of grooves The setting decreases in a gradient as the cover beam side follows the other side.