Control system of large-mining-height hydraulic support and hydraulic support

Abstract

The invention provides a control system of a large-mining-height hydraulic support and the hydraulic support, the hydraulic support at least comprises a bottom plate, a telescopic stand column and a top beam, and the control system comprises an adjacent support control device, a large-flow electro-hydraulic control reversing valve assembly and a small-flow electro-hydraulic control reversing valve assembly. The large-flow electro-hydraulic control reversing valve assembly is used for controlling the hydraulic driving parts exceeding the flow threshold value and connected with the adjacent frame control device, the small-flow electro-hydraulic control reversing valve assembly is used for controlling the hydraulic driving parts not exceeding the flow threshold value and comprises a small-flow reversing valve and a pilot valve, and the pilot valve is connected with the small-flow reversing valve. And the small-flow reversing valve is controlled through the pilot valve. According to the embodiment of the invention, the electro-hydraulic control reversing valves with different flows can be selected according to the use of the hydraulic cylinders of different hydraulic driving parts in the hydraulic support, and proper mounting positions are selected for mounting, so that primary liquid supply is realized as required, the length and the number of mounting pipelines are reduced, and the mounting and the maintenance are convenient.

Description

Technical Field

[0001] This disclosure relates to the field of control technology for hydraulic supports, and more specifically, to a control system and hydraulic support for a hydraulic support with high mining height. Background Technology

[0002] The existing high-extraction hydraulic system uses a two-stage fluid supply method, that is, the column quick-supply valve is controlled by an electro-hydraulic directional valve to supply fluid to the high-flow column hydraulic control check valve. The column quick-supply valve is located below the multi-pass block on the connecting rod, which makes maintenance and replacement of hoses difficult, and the number and length of hoses are numerous.

[0003] If the existing electro-hydraulic directional valve is installed on the top plate, although it is convenient to operate manually, it will result in more pipelines and complex connections. If the electro-hydraulic directional valve is installed on the top beam or shield beam, it will be inconvenient to operate manually.

[0004] In addition, the original controller was installed at the rear of the pedestrian walkway. The rear of the controller required 10 connectors to connect to the controller, sensors, power supply, etc. The wiring was long and numerous, which could easily cause the connectors and hydraulic lines to pile up and squeeze. Summary of the Invention

[0005] In view of this, the present disclosure aims to provide a control system and hydraulic support for a high-extraction hydraulic support, so as to at least partially solve the above-mentioned technical problems in the prior art.

[0006] One aspect of this disclosure provides a control system for a high-extraction hydraulic support. The hydraulic support includes at least a base plate, a telescopic column, and a top beam. The control system includes a local adjacent support control device, a high-flow electro-hydraulic directional valve assembly, and a low-flow electro-hydraulic directional valve assembly. The high-flow electro-hydraulic directional valve assembly is used to control hydraulic drive components exceeding a flow threshold and is connected to the local adjacent support control device. The low-flow electro-hydraulic directional valve assembly is used to control hydraulic drive components not exceeding a flow threshold. The low-flow electro-hydraulic directional valve assembly includes a low-flow directional valve and a pilot valve, through which the pilot valve controls the low-flow directional valve.

[0007] In some embodiments, the high-flow electro-hydraulic directional valve assembly is mounted on the column and is used to control the hydraulic cylinders of at least one of the left column, right column, base lifting jack, bottom adjusting jack, and pushing jack of the hydraulic support.

[0008] In some embodiments, the low-flow reversing valve is disposed on the top beam or the shield beam, and the pilot valve is installed above the bottom plate of the same frame or an adjacent frame. The low-flow reversing valve is used to control the hydraulic cylinder of at least one of the telescopic beam jacks, side guard jacks, side guard plate jacks, and balance jacks of the hydraulic support.

[0009] In some embodiments, the adjacent rack control device is further connected to an auxiliary device, which is at least one of a first sensor, a camera device, an alarm device, a regulated power supply, and an automatic backwash filter, wherein the first sensor is used in conjunction with the high-flow electro-hydraulic directional valve assembly.

[0010] In some embodiments, the low-flow electro-hydraulic directional valve assembly is connected to the adjacent rack control device via an access device.

[0011] In some embodiments, the access device is also connected to a second sensor, which is used in conjunction with the low-flow electro-hydraulic directional valve assembly.

[0012] In some embodiments, the second sensor is a push stroke sensor and / or a column pressure sensor.

[0013] In some embodiments, the access device is an intrinsically safe access device.

[0014] In some embodiments, the adjacent rack control device is a gigabit network controller.

[0015] One aspect of this disclosure provides a hydraulic support, including the control system of the high-extraction hydraulic support described in any of the preceding embodiments.

[0016] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and are used, together with the description and claims, to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The accompanying drawings, which are provided to further understand this disclosure and form part of this application, are used to explain the illustrative embodiments of this disclosure and do not constitute an undue limitation of this disclosure. In the drawings:

[0018] Figure 1 This is a schematic diagram of the architecture of the control system of a high-extraction hydraulic support in one embodiment provided in this disclosure;

[0019] Figure 2This is a wiring control diagram of the control system of a high-extraction hydraulic support in one embodiment provided in this disclosure;

[0020] Figure 3 This is an installation schematic diagram of the control system of a high-extraction hydraulic support in one embodiment provided in this disclosure.

[0021] The above figures include the following reference numerals:

[0022] 1-Adjacent frame control device; 2-High flow electro-hydraulic directional valve assembly; 3-Low flow electro-hydraulic directional valve assembly; 4-Connector; 5-Auxiliary device; 6-Automatic backwash filter; 7-Push stroke sensor; 8-Column pressure sensor; 11-Base plate; 12-Retractable column; 13-Top beam; 31-Low flow directional valve; 32-Pilot valve; 41-Left column; 42-Right column; 43-Base lifting jack; 44-Bottom adjustment jack; 45-Push jack; 51-Telescopic beam jack; 52-Side protection jack; 53-Side guard plate jack; 54-Balancing jack. Detailed Implementation

[0023] The specific embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of this disclosure.

[0024] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0025] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0026] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0027] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0028] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0029] Specific embodiments of the present disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure and can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of substantially any suitable detailed structures.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0032] This disclosure provides a control system for a high-extraction hydraulic support, used to control the hydraulic cylinders of the hydraulic drive components within the hydraulic support. This hydraulic support is particularly suitable for high-extraction hydraulic supports, which are typically quite tall. For example, the height of such hydraulic supports is generally above 3 meters. Figures 1-3 As shown, the hydraulic support involved in this embodiment includes at least a base plate 11, a telescopic column 12, and a top beam 13. The column 12 is disposed above the base plate 11, and its position is adjusted by raising or lowering the column. The raising or lowering of the column 12 is driven by a hydraulic cylinder. In addition, the hydraulic support also includes components such as a lifting base, a bottom adjustment mechanism, a telescopic beam, side guards, and side plates. The lifting base and bottom adjustment mechanism are all hydraulically driven components that are driven by jacks equipped with hydraulic cylinders.

[0033] Specifically, the control system of the high-extraction hydraulic support in this embodiment includes a local adjacent support control device 1, a high-flow electro-hydraulic directional valve assembly 2, and a low-flow electro-hydraulic directional valve assembly 3. The local adjacent support control device 1 is used to control the current hydraulic support and its adjacent hydraulic supports (i.e., the local support or the adjacent support). The high-flow electro-hydraulic directional valve assembly 2 is directly connected to the local adjacent support control device 1. The low-flow electro-hydraulic directional valve assembly 3 can be directly connected to the local adjacent support control device 1, or it can be connected to the local adjacent support control device 1 through an access device 4, thereby indirectly controlling the low-flow electro-hydraulic directional valve assembly 3 through the local adjacent support control device 1. Here, the access device 4 is directly connected to the local adjacent support control device 1, and it can be an intrinsically safe access device.

[0034] Furthermore, the high-flow electro-hydraulic directional valve assembly 2 is used to control hydraulic drive components exceeding a flow threshold, such as regulating flow rates exceeding 500L. It can be installed in the middle of the column 12 of the hydraulic support. The high-flow electro-hydraulic directional valve assembly 2 controls the hydraulic cylinders of components requiring high flow rates, such as the left column 41, right column 42, base lifting jack 43, bottom adjusting jack 44, and pushing jack 45. Installing the high-flow electro-hydraulic directional valve assembly 2 in the middle of the column 12 allows it to be closer to the hydraulic cylinders, thus saving on the length of connecting pipes between components and reducing connection complexity, while also offering the advantages of convenient installation and maintenance.

[0035] Furthermore, the low-flow electro-hydraulic directional valve assembly 3 is used to control hydraulic drive components with flow rates not exceeding a flow threshold, for example, it can adjust and control hydraulic drive components with flow rates not exceeding 500L. It adopts a split structure, specifically including a low-flow directional valve 31 and a pilot valve 32. The pilot valve 32 controls the low-flow directional valve 31. The low-flow directional valve 31 is installed on the top beam 13 or shield beam of the hydraulic support, and the pilot valve 32 is installed above the base plate 11 of the same or adjacent support. Considering that the height of high-extraction hydraulic supports is generally high, by adopting the low-flow electro-hydraulic directional valve assembly 3 with a split structure, the pilot valve 32 can be easily operated manually to control the low-flow directional valve 31, thus facilitating manual control of the low-flow electro-hydraulic directional valve assembly 3 without requiring climbing or other auxiliary operating equipment.

[0036] Furthermore, the low-flow reversing valve 31 is installed on the top beam 13 or the shield beam of the hydraulic support. It is used to control the hydraulic cylinders of components with low flow requirements, such as the telescopic beam jack 51, the side guard jack 53, the side guard plate jack 53, and the balance jack 54 of the hydraulic support. The installation position of the low-flow reversing valve 31 is relatively close to these hydraulic cylinders. Therefore, it avoids the bending and squeezing of long and complex pipelines when the high-extraction support is in operation. It can save the length of the pipes between components and reduce the complexity of the connection. At the same time, it has the advantages of convenient installation and maintenance.

[0037] Specifically, the small-flow electro-hydraulic directional valve needs to be installed on the top beam or shield beam for control. Its installation position changes laterally or vertically with the raising or lowering of the hydraulic support during high-extraction operations. This results in the valve being too high and inconvenient to operate during raising, and retracting into the hydraulic support during lowering, also hindering operation. In this embodiment, the small-flow electro-hydraulic directional valve assembly 3 is configured as a separate small-flow directional valve 31 and pilot valve 32. The small-flow directional valve 31 is installed on the top beam 13 or shield beam, and the pilot valve 32 is installed above the base plate 11 of this or an adjacent frame. This allows for convenient manual control of the small-flow directional valve 31 by controlling the pilot valve 32, thus enabling manual control of the small-flow electro-hydraulic directional valve assembly 3 without the need for climbing or other auxiliary equipment.

[0038] In this embodiment, the large-flow electro-hydraulic directional valve assembly 2 or the small-flow electro-hydraulic directional valve assembly 3 can be selected and installed at a suitable location on the hydraulic support according to the different hydraulic cylinder specifications of different hydraulic drive components. This enables on-demand first-stage fluid supply, reduces the length and number of installation pipelines, and facilitates installation and maintenance.

[0039] In this embodiment, the high-flow electro-hydraulic directional valve assembly 2 and the low-flow electro-hydraulic directional valve assembly 3 are automatically controlled by the adjacent rack control device 1. Here, the adjacent rack control device 1 is a gigabit network controller, which can realize the control of the high-flow electro-hydraulic directional valve assembly 2 and the low-flow electro-hydraulic directional valve assembly 3 through a high-speed network.

[0040] In this embodiment, the electro-hydraulic directional valve, typically used in hydraulic supports, is replaced by a combination of the high-flow electro-hydraulic directional valve assembly 2 and the low-flow electro-hydraulic directional valve assembly 3. The high-flow electro-hydraulic directional valve assembly 2 controls the hydraulic cylinders of components requiring high flow rates, such as the left column 41, right column 42, base lifting jack 43, bottom adjusting jack 44, and pushing jack 45 of the hydraulic support. The low-flow electro-hydraulic directional valve assembly 3 controls the hydraulic cylinders of components with lower flow requirements, such as the telescopic beam jack 51, and various stage (e.g., primary, secondary, and tertiary) side support jacks 52, side guard plate jacks 53, and balance jacks 54 of the hydraulic support. This allows for categorized control of different hydraulic drive components, improving control accuracy.

[0041] Furthermore, the adjacent frame control device 1 can also be connected to an auxiliary device 5, which may be, for example, a first sensor (e.g., a height sensor), a camera device (e.g., a pan-tilt camera), an alarm device (e.g., an audible and visual alarm), a regulated power supply, and an automatic backwash filter 6. Here, the first sensor is used in conjunction with the high-flow electro-hydraulic directional valve assembly 2 to monitor the movement of the hydraulically driven components that achieve high-flow control.

[0042] The height sensor is used to monitor the height of the hydraulic support; the pan-tilt camera is used to monitor the status of the fully mechanized mining face; the audible and visual alarm is used to sound an alarm when the fully mechanized mining face is in an abnormal state; the regulated power supply is used to supply power to the adjacent support control device 1, related sensors, and other devices; the automatic backwash filter 6 is used to filter impurities in the medium.

[0043] In another embodiment, the adjacent frame control device 1 can be connected to the access device 4. The access device 4 can be connected to the adjacent frame control device 1 via wired or wireless means. The access device 4 is installed on the hydraulic support, for example, on the shield beam. The access device 4 can connect to the small flow electro-hydraulic directional valve assembly 3 so that the adjacent frame control device 1 can control the small flow electro-hydraulic directional valve assembly 3 through the access device 4.

[0044] In addition, the access device 4 can also connect to a second sensor, which is used in conjunction with the low-flow electro-hydraulic directional valve assembly 3 to monitor the movement of the hydraulic drive component that achieves low-flow control. The second sensor can be, for example, a push stroke sensor 7 and a column pressure sensor 8, to monitor relevant data.

[0045] In this embodiment, the high-flow electro-hydraulic directional valve assembly 2 is directly connected to the adjacent rack control device 1 for rack control, while the low-flow electro-hydraulic directional valve assembly 3 is indirectly controlled through the access device 4 and the adjacent rack control device 1.

[0046] Meanwhile, by connecting the small flow electro-hydraulic directional valve assembly 3, the push stroke sensor 7, and the column pressure sensor 8 to the access device 4, the access device 4 and the adjacent rack control device 1 can be connected through a single connecting cable. This avoids directly connecting multiple connecting cables to the adjacent rack control device 1 and also makes the cable routing more reasonable and easier to maintain and replace.

[0047] A second embodiment of this disclosure provides a hydraulic support, including a control system for a high-extraction hydraulic support as described in any of the preceding claims. The hydraulic support described herein is particularly a high-extraction hydraulic support, meaning it is relatively tall. For example, the height of such a hydraulic support is generally above 3 meters.

[0048] The hydraulic support described here can have any structure, including at least a base plate 11, a telescopic column 12, and a top beam 13. The column 12 is positioned above the base plate 11, and its position is adjusted by raising or lowering the column. The raising or lowering of the column 12 is driven by a hydraulic cylinder. Furthermore, the hydraulic support also includes components such as a lifting base, a bottom adjustment mechanism, a telescopic beam, side guards, and side plates. The lifting base and bottom adjustment mechanism are all hydraulically driven components, operated by jacks equipped with hydraulic cylinders.

[0049] The embodiments disclosed herein can select electro-hydraulic directional valves with different flow rates according to the use of hydraulic cylinders of different hydraulic drive components in the hydraulic support and select appropriate installation positions for installation, so as to realize on-demand primary fluid supply, and reduce the length and number of installation pipelines, making installation and maintenance convenient.

[0050] In the above embodiments of this disclosure, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this disclosure.

[0053] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0054] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A control system for a high-extraction hydraulic support, wherein the hydraulic support comprises at least a base plate, a telescopic column, and a top beam, characterized in that, The control system includes a local adjacent frame control device, a high-flow electro-hydraulic directional valve assembly, and a low-flow electro-hydraulic directional valve assembly. The high-flow electro-hydraulic directional valve assembly is used to control hydraulically driven components exceeding a flow threshold and is connected to the local adjacent frame control device. The low-flow electro-hydraulic directional valve assembly is used to control hydraulically driven components not exceeding a flow threshold. The low-flow electro-hydraulic directional valve assembly includes a low-flow directional valve and a pilot valve, through which the pilot valve is used to control the low-flow directional valve.

2. The control system for the high-extraction hydraulic support according to claim 1, characterized in that, The high-flow electro-hydraulic directional valve assembly is mounted on the column and is used to control the hydraulic cylinders of at least one of the left column, right column, base lifting jack, bottom adjusting jack, and pushing jack of the hydraulic support.

3. The control system for the high-extraction hydraulic support according to claim 1, characterized in that, The low-flow reversing valve is installed on the top beam or shield beam, and the pilot valve is installed above the bottom plate of the same frame or adjacent frame. The low-flow reversing valve is used to control the hydraulic cylinder of at least one of the telescopic beam jack, side guard jack, side guard plate jack, and balance jack of the hydraulic support.

4. The control system for the high-extraction hydraulic support according to claim 1, characterized in that, The adjacent rack control device is also connected to an auxiliary device, which is at least one of a first sensor, a camera device, an alarm device, a regulated power supply, and an automatic backwash filter, wherein the first sensor is used in conjunction with the high-flow electro-hydraulic directional valve assembly.

5. The control system for the high-extraction hydraulic support according to any one of claims 1-4, characterized in that, The low-flow electro-hydraulic directional valve assembly is connected to the adjacent frame control device via an access device.

6. The control system for the high-extraction hydraulic support according to claim 5, characterized in that, The access device is also connected to a second sensor, which is used in conjunction with the low-flow electro-hydraulic directional valve assembly.

7. The control system for the high-extraction hydraulic support according to claim 6, characterized in that, The second sensor is a push stroke sensor and / or a column pressure sensor.

8. The control system for the high-extraction hydraulic support according to claim 5, characterized in that, The access device is an intrinsically safe access device.

9. The control system for the high-extraction hydraulic support according to claim 1, characterized in that, The adjacent rack control device is a gigabit network controller.

10. A hydraulic support, characterized in that, The control system of the high-extraction hydraulic support as described in any one of claims 1-9.

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