A hydraulic support capable of automatically filling the end head paste body by lateral extension

Abstract

The utility model provides a kind of automatic lateral extension end head paste filling hydraulic support, and the support includes hydraulic support main body, lateral extension subassembly and bottom sealing assembly, and hydraulic support main body includes base, two lifting hydraulic cylinders are fixed on base and are parallel, and the piston rod top end of two lifting hydraulic cylinders is rigidly connected with roof beam;Lateral extension subassembly includes fixed side guard plate fixed to the rear end of base and two up-down displacement hydraulic cylinders, and the piston rod top end of two up-down displacement hydraulic cylinders is rigidly connected with up-down displacement side guard plate arranged in parallel with fixed side guard plate, and connecting rod support hydraulic cylinder is installed on fixed side guard plate and up-down displacement side guard plate, and horizontal displacement side guard plate is hinged with fixed side guard plate and up-down displacement side guard plate respectively by two connecting rod support hydraulic cylinders;Bottom sealing assembly includes sealing gasket fixed to the bottom end of horizontal displacement side guard plate.The application forms continuous sealing surface using multidirectional adjustable side guard plate, and the automatic plugging of end head transverse gap can be realized.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic support equipment for filling, specifically to an automated laterally extendable end-filling hydraulic support, which is particularly suitable for end-filling operations in coal mining faces of different widths and can achieve automatic sealing of roadway ends. Background Technology

[0002] Traditional filling processes in narrow working spaces at the upper end generally employ a combination of hydraulic supports for filling paste at the end and manual construction. Specifically, after the hydraulic supports for filling paste at the end complete the initial sealing, the lateral gaps are then sealed manually using wooden molds and straw mats. However, this technical solution has the following drawbacks: (1) the manual sealing process is time-consuming; (2) the elevated and inclined working face poses a safety hazard. This traditional method has low overall filling efficiency and a high material waste rate, seriously hindering the development of safe and efficient mining technology under complex geological conditions.

[0003] Furthermore, traditional end-filling hydraulic supports have limited functionality. Based on their structural design, they can be divided into fixed end-filling supports and adjustable end-filling supports. A typical example of a fixed end-filling support is the end-filling support for coal mine paste filling (CN222615387U) invented by Shandong Kangge Energy Technology Co., Ltd. Its structural characteristics include fixed side plate positions that cannot be dynamically adjusted. It is simple in structure and low in cost, suitable for conventional working faces with stable geological conditions and small variations in roadway dimensions; however, its adaptability is poor, and it cannot cope with surrounding rock deformation or complex spatial structures. Adjustable end-filling supports are characterized by side plates that can be automatically or manually adjusted via hydraulic or mechanical mechanisms. However, the current design functions of related end-filling supports are relatively limited, allowing only single-degree-of-freedom adjustment and only vertical displacement. For example, the hydraulic support for the end of the roadway in the paste filling working face (CN115506844A) invented by Shandong Kangge Energy Technology Co., Ltd. relies on the vertical displacement of the side plate for protection. It has the disadvantage of small protection area and inability to effectively seal the side of the roadway end. This disadvantage is particularly obvious when the end working face is irregular. Utility Model Content

[0004] To address the technical problems of existing fixed end supports having poor adaptability and being unable to cope with surrounding rock deformation or complex spatial structures, while adjustable end supports rely solely on the vertical displacement of the side plates for protection, resulting in a small protection area and an inability to effectively seal the end in the horizontal displacement direction, this utility model provides an automated laterally extendable end-filling grease hydraulic support.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An automated laterally extending end-filling hydraulic support for paste filling includes a hydraulic support body, a lateral extension assembly, and a bottom sealing assembly. The hydraulic support body includes a base, on which two lifting hydraulic cylinders are fixed in parallel. The piston rods of the two lifting hydraulic cylinders are rigidly connected to a top beam. The lateral extension assembly includes a fixed side guard plate fixed to the rear end of the base, and two vertical displacement hydraulic cylinders fixed in parallel to the rear of the base. The piston rods of the two vertical displacement hydraulic cylinders are rigidly connected to vertical displacement side guard plates, which are arranged parallel to the fixed side guard plate. Both the guard plate and the upper and lower displacement side guard plates are equipped with connecting rod support hydraulic cylinders. The piston rod ends of the two connecting rod support hydraulic cylinders are hinged to connecting rod supports. One end of the two connecting rod supports is hinged to an elastic horizontal displacement side guard plate. The other end of the connecting rod support hinged to the connecting rod support hydraulic cylinder on the fixed side guard plate is hinged to the fixed side guard plate. One end of the connecting rod support hinged to the connecting rod support hydraulic cylinder on the upper and lower displacement side guard plate is hinged to the upper and lower displacement side guard plate. The bottom sealing assembly includes a sealing gasket fixed to the bottom end of the horizontal displacement side guard plate. The sealing gasket is in contact with the connecting rod support hinged to the connecting rod support hydraulic cylinder on the fixed side guard plate.

[0007] Furthermore, the base is provided with a mounting seat that is fixed to the bottom of the cylinder body of the lifting hydraulic cylinder, and the bottom surface of the base is provided with an array of anti-slip grooves.

[0008] Furthermore, the horizontal displacement side guard plate is a rubber plate, and the horizontal displacement side guard plate is provided with a pressure threshold. The pressure threshold is configured to trigger the hydraulic cylinder of the connecting rod bracket to lock when the side contact pressure with the working surface of the end reaches a preset value.

[0009] Compared with the prior art, the hydraulic support for automated lateral extension end filling of paste provided by this utility model has the following advantages:

[0010] 1. When the end-end paste filling hydraulic support is working, it can quickly adapt to the support of end working faces of various heights by adjusting the height of the lifting hydraulic cylinder piston rod.

[0011] 2. A vertical displacement hydraulic cylinder is installed on the base. The piston rod of the vertical displacement hydraulic cylinder is rigidly connected to the vertical displacement side guard plate. When the end-point filling hydraulic support starts operation, the vertical position of the vertical displacement side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the vertical displacement hydraulic cylinder. This adjustment mechanism allows the vertical displacement side guard plate, the horizontal displacement side guard plate, and the fixed side guard plate to work together to form a continuous sealing surface. It can automatically adapt the sealing gap according to different end-point working surface heights, effectively improving the sealing performance of the end-point area. This structure innovatively achieves a height-adaptive sealing effect, ensuring the safety and stability of the working surface operation.

[0012] 3. A hydraulic cylinder with a connecting rod support is installed on the fixed side guard plate and the vertically displaced side guard plate. The piston rod of the hydraulic cylinder with the connecting rod support is hinged to the horizontally displaced side guard plate through the connecting rod support. When the end-point filling hydraulic support starts working, the horizontal movement of the horizontally displaced side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the hydraulic cylinder with the connecting rod support. This allows it to form a dynamic sealing fit with the vertically adjustable vertically displaced side guard plate, thereby effectively sealing the end in the horizontal displacement direction. This multi-directional adjustment mechanism can be precisely adapted to the actual dimensions (including height and width) of the end working surface. Through the synergistic effect of the displacement components in each direction, a complete sealing interface is constructed, significantly improving the sealing reliability and equipment adaptability under complex working conditions.

[0013] 4. By fixing a sealing gasket at the lower end of the horizontal displacement side guard plate, after the horizontal displacement side guard plate and the upper and lower displacement side guard plates have been adjusted to perform preliminary sealing on the end working surface, pressure can be applied to the sealing gasket through the connecting rod bracket hinged to the hydraulic cylinder of the connecting rod bracket on the fixed side guard plate. Under the action of the piston rod of the connecting rod bracket hydraulic cylinder, the sealing gasket forms an elastic sealing layer, reducing the leakage rate of the filling paste, thereby achieving the sealing between the horizontal displacement side guard plate and the bottom of the roadway, and completing the complete sealing of the end working surface.

[0014] 5. The lifting hydraulic cylinder, the vertical displacement hydraulic cylinder, and the connecting rod support hydraulic cylinder can be integrated and controlled through the existing hydraulic system. The single adjustment time is short, which significantly improves the sealing efficiency. Attached Figure Description

[0015] Figure 1 This is an unfolded diagram of the hydraulic support structure for automatically extending the end of the paste filling machine provided by this utility model.

[0016] Figure 2 This is a diagram showing the shrinkage of a hydraulic support structure for automatically extending lateral end paste filling, provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the hinged structure of the hydraulic cylinder and the connecting rod support in the hydraulic support for automated lateral extension end paste filling provided by this utility model.

[0018] In the diagram, 1 is the base; 2 is the lifting hydraulic cylinder; 3 is the top beam; 4 is the fixed side guard plate; 5 is the vertical displacement hydraulic cylinder; 6 is the vertical displacement side guard plate; 7 is the connecting rod support hydraulic cylinder; 8 is the connecting rod support; 9 is the horizontal displacement side guard plate; and 10 is the sealing gasket. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please refer to Figures 1 to 3As shown, this utility model provides an automated laterally extending end-filling hydraulic support for paste filling, including a hydraulic support body, a lateral extension component, and a bottom sealing component. The hydraulic support body includes a base 1, on which two lifting hydraulic cylinders 2 are fixed in parallel. The piston rods of the two lifting hydraulic cylinders 2 are rigidly connected to a top beam 3, thereby dynamically adjusting the height of the top beam 3 (end-filling hydraulic support height) to adapt to the end-filling working surface, providing rapid and effective support for the end-filling working surface and improving work efficiency. The lateral extension component includes a fixed side guard plate 4 fixedly disposed at the rear end of the base 1, and two vertical displacement hydraulic cylinders 5 fixed in parallel at the rear of the base 1. The piston rod of the lower displacement hydraulic cylinder 5 is rigidly connected to an upper and lower displacement side guard plate 6. The upper and lower displacement side guard plate 6 is arranged parallel to the fixed side guard plate 4. The fixed side guard plate 4 can directly form an effective seal on the end during operation. Under the synchronous extension and retraction drive of the piston rods of the two upper and lower displacement hydraulic cylinders 5, the upper and lower displacement side guard plates 6 can be precisely adjusted in the vertical direction. That is, the height of the sealing surface of the upper and lower displacement side guard plates 6 can be adjusted by the upper and lower displacement hydraulic cylinders 5, ultimately achieving a dynamic sealing connection between its working surface and the upper surface of the tunnel end. This function not only adapts to tunnel ends of different heights but also provides a reliable sealing effect, providing strong support for improving operational efficiency and ensuring project safety. This design reduces the need for manual operation. Both the fixed side guard plate 4 and the vertical displacement side guard plate 6 are equipped with connecting rod support hydraulic cylinders 7. The piston rods of both connecting rod support hydraulic cylinders 7 are hinged to connecting rod supports 8. One end of each connecting rod support 8 is hinged to an elastic horizontal displacement side guard plate 9. The other end of the connecting rod support 8 hinged to the connecting rod support hydraulic cylinder 7 on the fixed side guard plate 4 is hinged to the fixed side guard plate 4. Similarly, one end of the connecting rod support 8 hinged to the connecting rod support hydraulic cylinder 7 on the vertical displacement side guard plate 6 is hinged to the vertical displacement side guard plate 6. In other words, one end of each connecting rod support 8 is hinged to the horizontal displacement side guard plate 9, and the other end is hinged to the vertical displacement side guard plate 6 where its respective connecting rod support hydraulic cylinder 7 is located. Under the coordinated action of the two connecting rod support hydraulic cylinders 7, the horizontal displacement side guard plate 9 can be adjusted in the horizontal direction, thereby adjusting the width of the sealing surface to meet the sealing requirements / sizes of different widths at the ends, effectively reducing labor costs and improving work efficiency; the bottom sealing assembly includes a sealing gasket 10 fixed to the bottom end of the horizontal displacement side guard plate 9. The sealing gasket 10 contacts the connecting rod support 8 hinged to the connecting rod support hydraulic cylinder 7 on the fixed side guard plate 4. Thus, the piston rod of the connecting rod support hydraulic cylinder 7 can apply pressure to the sealing gasket 10 through the connecting rod support 8 to enhance the bottom seal, achieving the effect of sealing the bottom end of the horizontal displacement side guard plate 9, thereby enhancing the overall stability and sealing effect of the hydraulic support and improving work efficiency.

[0023] As a specific embodiment, the base 1 is provided with a mounting seat fixed to the bottom of the cylinder of the lifting hydraulic cylinder 2, and the bottom surface of the base 1 is provided with an anti-slip groove array. Thus, during the paste filling process, the vertical component of the lateral pressure of the slurry can be borne by the lifting hydraulic cylinder 2, while the horizontal component can be dispersed to the bottom surface of the tunnel through the anti-slip groove array on the bottom surface of the base 1.

[0024] As a specific embodiment, the horizontal displacement side guard plate 9 is a rubber plate, and the horizontal displacement side guard plate 9 is provided with a pressure threshold. The pressure threshold is configured to trigger the hydraulic cylinder 7 of the connecting rod bracket to lock when the side contact pressure with the working surface of the end reaches a preset value, thereby better preventing the horizontal displacement side guard plate 9 from being overloaded and deformed.

[0025] The working principle of the automated lateral extension end-filling hydraulic support provided by this utility model is as follows: First, the base 1 is fixed. By controlling the piston rod of the lifting hydraulic cylinder 2 to rise and fall, the top beam 3 is controlled to adapt to the sealing height of the end working surface. At this time, the filling hydraulic support has formed effective support for the upper surface of the end working surface. Then, the piston rod of the vertical displacement hydraulic cylinder 5 is controlled to rise and fall, thereby controlling the vertical displacement side guard plate 6 to rise and fall, completing the contact and sealing with the upper surface of the end working surface. Through the cooperation of the vertical displacement side guard plate 6 and the fixed side guard plate 4, the sealing of the upper and lower surfaces of the end working surface is completed. Then, the piston rod of the connecting rod support hydraulic cylinder 7 is controlled to extend, thereby controlling the horizontal displacement side guard plate 9 to contact and seal with the side of the end working surface. Through the cooperation of the horizontal displacement side guard plate 9, the fixed side guard plate 4, and the vertical displacement side guard plate 6, the left and right surfaces of the end working surface can be effectively sealed. Finally, by controlling the piston rod of the hydraulic cylinder 7 of the connecting rod bracket on the fixed side guard plate 4 to apply a pressure perpendicular to the ground to the sealing gasket 10, the bottom end of the horizontal displacement side guard plate 9 is fixed and sealed, thereby completing the sealing work of the four surfaces of the entire end working surface.

[0026] This utility model also provides a method for preventing slurry in a hydraulic support with an automated laterally extending end for filling paste. The method utilizes the aforementioned automated laterally extending end for filling paste, and includes the following steps:

[0027] S1. Hydraulic support retraction and positioning:

[0028] The hydraulic cylinders for controlling the vertical displacement and the connecting rod support are in a fully retracted state, so that the lateral extension assembly forms a folded structure.

[0029] S2. Temporary support establishment:

[0030] The piston rod of the lifting hydraulic cylinder is extended until the top beam abuts against the tunnel roof and reaches a preset support pressure threshold.

[0031] S3, Continuous sealing molding:

[0032] The piston rods of the vertical displacement hydraulic cylinder and the connecting rod support hydraulic cylinder are extended synchronously, so that the vertical displacement side guard plate extends in the vertical direction and the horizontal displacement side guard plate extends in the horizontal direction, forming a continuous sealing surface with the fixed side guard plate;

[0033] The piston rod of the hydraulic cylinder controlling the connecting rod bracket on the fixed side guard plate continues to extend, and the connecting rod bracket hinged to the piston rod applies pressure to the sealing gasket, causing the sealing gasket to compress and deform and contact the bottom surface of the tunnel to achieve a sealing effect.

[0034] S4, Stress-coordinated load bearing:

[0035] During the filling process, the lateral pressure of the filling paste slurry is transmitted to the lifting hydraulic cylinder and the base through the continuous sealing surface. The vertical component is borne by the lifting hydraulic cylinder, and the horizontal component is dispersed to the bottom of the tunnel through the anti-slip groove array on the bottom surface of the base.

[0036] S5, Dynamic recovery of hydraulic support:

[0037] After the slurry has solidified, perform the shrinkage operation in the following order:

[0038] S51, the piston rod of the hydraulic cylinder of the connecting rod support retracts first, releasing the sealing gasket from contact with the bottom of the roadway;

[0039] S52. The piston rod of the hydraulic cylinder of the connecting rod support retracts in stages to eliminate the structural stress between the horizontal displacement side guard plate and the roadway.

[0040] S53, the piston rods of the vertical displacement hydraulic cylinder and the lifting hydraulic cylinder retract synchronously to the initial state.

[0041] To better understand the automated laterally extendable end-cap hydraulic support for filling paste provided by this utility model, the following will illustrate it through specific implementation examples:

[0042] Implementation Case 1:

[0043] Application scenarios:

[0044] In a coal mine working face with soft rock, the surrounding rock has low strength and is easily deformable, causing the roadway cross-section to continuously converge after excavation. Significant roof subsidence and inward squeezing of the sidewalls are observed at the end area, placing extremely high demands on the active adaptability and sealing reliability of the end supports. Traditional rigid supports often suffer from significant grout leakage under these conditions due to inadequate roof contact and sealing failure.

[0045] Implementation steps:

[0046] Stent placement and initial support:

[0047] The hydraulic support, which is in a retracted and folded state, is transported to the end work area and positioned.

[0048] Activate lifting hydraulic cylinder 2 to bring top beam 3 into contact with the roadway roof. The hydraulic system continuously monitors the support pressure and automatically compensates for the rise as the roof sinks, maintaining constant support resistance and effectively controlling further deformation of the roof.

[0049] Adaptive sealing surface construction:

[0050] Top and bottom sealing: Two vertical displacement hydraulic cylinders 5 are synchronously controlled to extend, driving the vertical displacement side guard plates 6 to move upward and tightly fit against the uneven roadway roof due to deformation, forming a dynamic seal in the vertical direction. This process continues until the contact pressure reaches the system set value.

[0051] Lateral sealing: Simultaneously, the hydraulic cylinders 7 of the two connecting rod supports work together to push the horizontal displacement side guard plate 9 to unfold towards the side wall of the roadway. The horizontal displacement side guard plate 9 is made of rubber plate, which can trigger hydraulic locking when the contact pressure reaches a preset threshold, ensuring a tight fit with the internal roadway while avoiding equipment damage or further destruction of the surrounding rock due to excessive compression.

[0052] Bottom closed-loop seal: After the horizontal displacement side guard plate 9 is in place, the hydraulic cylinder 7 of the linkage bracket on the fixed side guard plate 4 continues to extend a certain stroke, applying downward pressure to the sealing gasket 10 installed at the bottom of the horizontal displacement side guard plate 9 through the linkage mechanism. The sealing gasket 10 undergoes compression deformation, filling the unevenness of the bottom plate, thus achieving a closed-loop seal at the bottom and preventing slurry leakage from the gaps in the bottom plate.

[0053] Filling load and stability control:

[0054] During the paste filling process, the lateral pressure generated by the filling material on the sealing surface is transmitted to the entire support structure. The vertical component is borne by the locked lifting hydraulic cylinder; the horizontal component is effectively transmitted to the tunnel floor through the friction generated by the anti-slip groove array at the bottom of the base, ensuring the anti-slip stability of the support under soft floor conditions.

[0055] Sequential recycling:

[0056] After the filling paste has fully cured, the stent should be retrieved strictly according to the established sequence:

[0057] First, the hydraulic cylinder 7 of the connecting rod support on the fixed side guard plate 4 is contracted to release the pressure on the sealing gasket 10 and loosen the bottom seal. Second, the two connecting rod support hydraulic cylinders 7 are contracted slowly in stages to gradually disengage the horizontal displacement side guard plate 9 from the roadway and release the accumulated stress.

[0058] Finally, the vertical displacement hydraulic cylinder 5 and the lifting hydraulic cylinder 2 are retracted simultaneously to restore the support to the transport state.

[0059] Implementation results:

[0060] In this soft rock tunnel application, the hydraulic support successfully achieved effective sealing of the deformed end, with no visible leakage during the filling process. Its adaptive adjustment capability overcame the influence of surrounding rock deformation, forming a stable and reliable closed space, providing key technical equipment for efficient filling under soft rock conditions.

[0061] Implementation Case 2:

[0062] Application scenarios:

[0063] The working face of a certain mine is located in a rectangular roadway with an 8-degree dip angle, a width of 2.4m, and a height of 3m. The roadway has a certain slope, and traditional supports are prone to slippage under inclined conditions, and inadequate lateral sealing can easily lead to slurry leakage. In addition, the roadway has relatively regular dimensions but narrow space, which places high demands on the positioning accuracy, anti-slip performance, and rapid sealing capability of the supports.

[0064] Implementation steps:

[0065] Bracket positioning and anti-slip positioning:

[0066] The hydraulic support is transported to the end area of ​​the inclined roadway in a retracted and folded state. The anti-slip groove array on the bottom surface of the base enhances the friction between the support and the inclined floor plate. After initial positioning, the angle of the top beam is finely adjusted by the lifting hydraulic cylinder to make it initially fit with the inclined floor plate, preventing the support from slipping under slope conditions.

[0067] Rapid support and sealing surface construction:

[0068] Roof support and vertical sealing: Control the extension of the lifting hydraulic cylinder 2 so that the top beam 3 is in close contact with the inclined roof and reaches the preset support pressure to establish stable support. Then control the action of the vertical displacement hydraulic cylinder 5 to drive the vertical displacement side guard plate 6 to extend along the slope of the roadway, closely fit the roof, and form a continuous seal on the roof side.

[0069] Lateral sealing: Two hydraulic cylinders 7 of the synchronous control linkage extend in unison, pushing the horizontal displacement side guard plate 9 to unfold towards the side wall of the roadway. Since the roadway width is 2.4m, the horizontal displacement side guard plate 9 can precisely adapt to the roadway width under hydraulic drive, and automatically lock when the contact pressure reaches the set threshold, achieving effective sealing of the side wall.

[0070] Bottom sealing enhancement: After the horizontal displacement side guard plate 9 is in place, the hydraulic cylinder 7 of the connecting rod bracket on the fixed side guard plate 4 continues to extend, and applies downward pressure to the sealing gasket through the connecting rod mechanism, so that it forms a compression seal on the inclined bottom plate, preventing the slurry from seeping downward along the slope of the bottom plate.

[0071] Filling load and anti-slip control:

[0072] During the filling process, the lateral pressure exerted by the paste slurry on the sealing surface is transmitted to the base through the support structure. The vertical component of the force is borne by the lifting hydraulic cylinder 2, while the horizontal component is effectively resisted by the friction between the anti-slip groove array at the bottom of the base and the inclined base plate, ensuring the overall stability of the support under an eight-degree inclination.

[0073] Organized recycling and relocation:

[0074] After the filling paste has cured, perform the recycling operation in sequence:

[0075] Prioritize retracting the hydraulic cylinder 7 of the connecting rod bracket on the fixed side guard plate 4 to release the bottom seal;

[0076] The two connecting rod support hydraulic cylinders 7 are contracted in stages to gradually detach the horizontal displacement side guard plate 9 from the roadway side.

[0077] The hydraulic cylinders 5 for vertical displacement and 2 for lifting are retracted simultaneously to restore the support to its folded transport state, making it easy to move to the next work site.

[0078] Implementation results:

[0079] In a rectangular roadway with an 8-degree dip and a cross-section of 2.4m × 3m, this hydraulic support demonstrated excellent adaptability, anti-slip performance, and sealing effect. Its multi-directional adjustable structure achieved complete sealing of the inclined roadway end, with no leakage during the filling process and smooth support recovery, effectively supporting efficient and safe mining operations.

[0080] Compared with the prior art, the hydraulic support for automated lateral extension end filling of paste provided by this utility model has the following advantages:

[0081] 1. When the end-point filling hydraulic support is in operation, it can quickly adapt to the end-point working surface of various heights by adjusting the height of the lifting hydraulic cylinder piston rod, providing effective support.

[0082] 2. A vertical displacement hydraulic cylinder is installed on the base. The piston rod of the vertical displacement hydraulic cylinder is rigidly connected to the vertical displacement side guard plate. When the end-point filling hydraulic support starts operation, the vertical position of the vertical displacement side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the vertical displacement hydraulic cylinder. This adjustment mechanism allows the vertical displacement side guard plate, the horizontal displacement side guard plate, and the fixed side guard plate to work together to form a continuous sealing surface. It can automatically adapt the sealing gap according to different end-point working surface heights, effectively improving the sealing performance of the end-point area. This structure innovatively achieves a height-adaptive sealing effect, ensuring the safety and stability of the working surface operation.

[0083] 3. A hydraulic cylinder with a connecting rod support is installed on the fixed side guard plate and the vertically displaced side guard plate. The piston rod of the hydraulic cylinder with the connecting rod support is hinged to the horizontally displaced side guard plate through the connecting rod support. When the end-point filling hydraulic support starts working, the horizontal movement of the horizontally displaced side guard plate can be precisely controlled by controlling the extension and retraction of the piston rod of the hydraulic cylinder with the connecting rod support. This allows it to form a dynamic sealing fit with the vertically adjustable vertically displaced side guard plate, thereby effectively sealing the end in the horizontal displacement direction. This multi-directional adjustment mechanism can be precisely adapted to the actual dimensions (including height and width) of the end working surface. Through the synergistic effect of the displacement components in each direction, a complete sealing interface is constructed, significantly improving the sealing reliability and equipment adaptability under complex working conditions.

[0084] 4. By fixing a sealing gasket at the lower end of the horizontal displacement side guard plate, after the horizontal displacement side guard plate and the upper and lower displacement side guard plates have been adjusted to perform preliminary sealing on the end working surface, pressure can be applied to the sealing gasket through the connecting rod bracket hinged to the hydraulic cylinder of the connecting rod bracket on the fixed side guard plate. Under the action of the piston rod of the connecting rod bracket hydraulic cylinder, the sealing gasket forms an elastic sealing layer, reducing the leakage rate of the filling paste, thereby achieving the sealing between the horizontal displacement side guard plate and the bottom of the roadway, and completing the complete sealing of the end working surface.

[0085] 5. The lifting hydraulic cylinder, the vertical displacement hydraulic cylinder, and the connecting rod support hydraulic cylinder can be integrated and controlled through the existing hydraulic system. The single adjustment time is short, which significantly improves the sealing efficiency.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydraulic support for automatically expanding laterally for filling paste, characterized in that, The system includes a hydraulic support body, a lateral extension assembly, and a bottom sealing assembly. The hydraulic support body includes a base, on which two lifting hydraulic cylinders are fixed in parallel. A top beam is rigidly connected to the top of the piston rods of the two lifting hydraulic cylinders. The lateral extension assembly includes a fixed side guard plate fixed to the rear end of the base, and two vertical displacement hydraulic cylinders fixed in parallel to the rear of the base. Vertical displacement side guard plates are rigidly connected to the top of the piston rods of the two vertical displacement hydraulic cylinders. The vertical displacement side guard plates are arranged parallel to the fixed side guard plate. Each of the two hydraulic cylinders is equipped with a connecting rod support hydraulic cylinder. The piston rod ends of both connecting rod support hydraulic cylinders are hinged to connecting rod supports. One end of each connecting rod support is hinged to an elastic horizontal displacement side guard plate. The other end of the connecting rod support hinged to the hydraulic cylinder on the fixed side guard plate is hinged to the fixed side guard plate. One end of the connecting rod support hinged to the hydraulic cylinder on the vertical displacement side guard plate is hinged to the vertical displacement side guard plate. The bottom sealing assembly includes a sealing gasket fixed to the bottom end of the horizontal displacement side guard plate. The sealing gasket is in contact with the connecting rod support hinged to the hydraulic cylinder on the fixed side guard plate.

2. The hydraulic support for automated laterally extending end-capped paste filling according to claim 1, characterized in that, The base is provided with a mounting seat that is fixed to the bottom of the cylinder of the lifting hydraulic cylinder, and the bottom surface of the base is provided with an array of anti-slip grooves.

3. The hydraulic support for automated laterally extending end-capped paste filling according to claim 1, characterized in that, The horizontal displacement side guard plate is a rubber plate, and the horizontal displacement side guard plate is provided with a pressure threshold. The pressure threshold is configured to trigger the hydraulic cylinder of the connecting rod bracket to lock when the side contact pressure with the working surface of the end reaches a preset value.

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