Adjustable hydraulic support

Abstract

The cam is fixedly mounted on a support frame, and the cam is secured to a position 56° to the left of the support frame, and the cam is secured to a position 56° to the right of the support frame.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, in particular to an adjustable hydraulic support. Background Art

[0002] Hydraulic supports are structures used to control mine pressure in coal mining faces. Mining pressure acts on the hydraulic supports in the form of external loads. In the mechanical system of the interaction between the hydraulic supports and the surrounding rock, if the combined force of the hydraulic support's supporting components and the combined external force of the roof acting on the hydraulic support are aligned, the hydraulic support is well adapted to the surrounding rock.

[0003] The existing hydraulic support cannot clean the dust on the surface of the piston in time, which causes wear on the piston surface when the column is extended and retracted, making the column slow during the extension and retraction process, thereby causing safety hazards. In this case, we propose an adjustable hydraulic support. Summary of the Invention

[0004] The present invention provides an adjustable hydraulic support. The purpose of the present invention is to solve the problem that the hydraulic support in the prior art cannot clean the dust on the surface of the piston in a timely manner, resulting in wear on the surface of the piston when the column is extended or retracted, causing the column to slow down during the extension and retraction process, thereby causing safety hazards. An adjustable hydraulic support is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is fixedly mounted on a support frame, and the cam is mounted on a support frame, and the cam is mounted on a support frame. The cam is mounted on a support frame, and the cam is mounted on a support frame. The cam is mounted on a support frame, and the cam is mounted on a support frame. The cam is mounted on a support frame, and the cam is mounted on a support frame. The upper end of the base is located on the left side of the mounting seat and is fixedly connected with two groups of secondary columns. The secondary columns are internally movably connected with a secondary live column. The upper end of the secondary live column is hinged to the lower end of the top beam. The upper end of the primary column and the upper end of the secondary column are both provided with a fixing ring, which is used to fix the scraper; the other end of the fixing ring is fixedly connected with a scraper, and the inner wall of the scraper is respectively slidably connected with the outer surface of the primary live column and the secondary live column. By arranging a scraper to clean the dust on the surface of the live column, the wear on the surface of the live column during the extension and retraction of the column can be reduced, thereby preventing the column from slowing down during the extension and retraction process, thereby causing a safety hazard.

[0007] Preferably, an airbag is provided on the outer surface of the fixing ring, and the airbag can be used in conjunction with an electromagnet to blow away dust scraped off by the scraper to prevent dust accumulation; an air inlet is provided on the side of the fixing ring close to the airbag, and multiple groups of annular grooves are provided on the side of the annular groove close to the airbag, and multiple groups of blowing holes are provided on the side of the annular groove close to the airbag, and the blowing holes between two adjacent groups of annular grooves are staggered; an air inlet and outlet are provided at the bottom end of the airbag close to the side of the fixing ring, and the air inlet and outlet are connected to the air inlet through a connecting pipe; the upper and lower ends of the airbag are fixedly connected to electromagnets, and by providing the electromagnets, the airbag can be squeezed to generate gas as a storage power source; the outer surfaces of the first-level column and the second-level column and the side close to the airbag are fixedly connected to a control box through a fixing bracket, and a controller and a battery are provided in the control box, and the electromagnets are electrically connected to the controller and the battery, and the provision of the battery facilitates power supply to the electromagnet and the controller.

[0008] Preferably, the opening of the blowing hole is tilted downward at 30°-45°, which helps the gas to blow away dust on the surface of the airbag.

[0009] Preferably, the outer diameter of the lower end of the scraper is larger than the outer diameter of the fixing ring, so that the dust scraped off by the scraper falls into the upper end of the airbag, thereby reducing the wear on the airbag surface caused by the dust falling between the airbag and the fixing ring during the extrusion process of the airbag.

[0010] Preferably, the cross-section of the scraper is a trapezoidal structure, which helps dust fall to the upper end of the airbag for easy cleaning.

[0011] Preferably, a plurality of one-way valves are fixedly connected to the inner wall of the air inlet and located below the annular groove. The one-way valves are provided to control the flow of gas to prevent the airbag from being insufficient to blow away dust on the surface of the airbag when the airbag is squeezed to the maximum limit.

[0012] Preferably, the flow direction of the one-way valve is from bottom to top, which can ensure that the gas is discharged from the blowing hole during the squeezing process of the airbag.

[0013] Preferably, the working air pressure value of the one-way valve increases from bottom to top. When the airbag begins to squeeze, the one-way valve at the lowest end opens first, but the blowing hole at the bottom is blocked by the airbag and the gas cannot be discharged. Therefore, the increase in air pressure will open the next one-way valve until the gas can be discharged from the blowing hole, thereby controlling the flow of gas.

[0014] Compared with the prior art, the present invention provides an adjustable hydraulic support with the following beneficial effects:

[0015] 1. In the present invention, a scraper is provided to clean the dust on the surface of the plunger, so that the wear on the surface of the plunger when the column is extended and retracted can be reduced, thereby preventing the column from slowing down during the extension and retraction process, thereby causing a safety hazard; by providing an air bag and an electromagnet to cooperate with each other, it is possible to prevent the cleaned dust from accumulating around the plunger, causing wear on the surface of the plunger when the column rotates, resulting in a slow phenomenon when the column is extended and retracted, thereby further improving the service life and reducing safety hazards.

[0016] 2. In the present invention, the opening of the blowing hole is tilted downward by 30°-45°, which helps the gas to blow away the dust on the surface of the airbag; a one-way valve is provided to control the flow of gas to prevent the gas from being insufficient to blow away the dust on the surface of the airbag when the airbag is squeezed to the maximum limit; the working air pressure values ​​of the one-way valves are set to increase from bottom to top. When the airbag begins to be squeezed, the one-way valve at the lowest end opens first, but the blowing hole at the lowest end is blocked by the airbag and the gas cannot be discharged. Therefore, the increase in air pressure will open the next one-way valve until the gas can be discharged from the blowing hole, thereby controlling the flow of gas.

[0017] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention has a simple structure and is easy to use. It can clean the dust on the outer surface of the piston and prevent the cleaned dust from accumulating around the piston, causing wear on the surface of the piston when the column rotates, resulting in slow rotation of the column. It can increase the service life of the column and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the scraper, airbag and fixing ring of the present invention;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the structure in working state;

[0021] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of the fixing ring of the present invention.

[0022] In the figure: base 1, first support plate 2, second support plate 3, top beam 4, mounting seat 5, first-level column 6, first-level piston 61, second-level column 7, second-level piston 71, scraper 8, fixing ring 9, air inlet 91, annular groove 92, air blowing hole 93, one-way valve 10, air bag 11, air inlet and outlet 12, electromagnet 13, control box 14. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0025] Reference Figure 1-4 , an adjustable hydraulic support, including a base 1, the right outer surface of the base 1 is rotatably connected to the first support plate 2, and the first support plate 2 is provided to assist the first-level column 6 in supporting the second support plate 3; the end of the first support plate 2 away from the base 1 is rotatably connected to the second support plate 3, and the end of the second support plate 3 away from the first support plate 2 is rotatably connected to the top beam 4, and the upper end of the base 1 is fixedly connected to the side of the first support plate 2 close to the first support plate 2, and the mounting seat 5 is provided for fixing and tilting the first-level column 6; the upper end of the mounting seat 5 is fixedly connected to the first-level column 6, and the inner part of the first-level column 6 is slidably connected to the first-level column 61, and the upper end of the first-level column 61 is hinged to the bottom end of the second support plate 3 Then, the upper end of the base 1 is located on the left side of the mounting seat 5 and is fixedly connected with two groups of secondary columns 7. The secondary columns 7 are internally movably connected with secondary pistons 71. The upper ends of the secondary pistons 71 are hinged to the lower end of the top beam 4. The upper ends of the primary columns 6 and the upper ends of the secondary columns 7 are both provided with fixing rings 9, which are used to fix the scraper 8; the other end of the fixing ring 9 is fixedly connected with a scraper 8, and the inner walls of the scraper 8 are respectively slidably connected to the outer surfaces of the primary piston 61 and the secondary piston 71. The scraper 8 is provided to clean the dust on the surface of the piston, which can reduce the wear on the surface of the piston when the column is extended and retracted, thereby preventing the column from slowing down during the extension and retraction process, thereby causing a safety hazard.

[0026] As an embodiment of the present invention, the outer surface of the fixing ring 9 is provided with an air bag 11, and the air bag 11 can be used in conjunction with the electromagnet 13 to blow away the dust scraped by the scraper 8 to prevent dust accumulation; the fixing ring 9 is provided with an air inlet 91 on the side close to the air bag 11, and the air inlet 91 is provided with multiple groups of annular grooves 92 on the side close to the air bag 11, and the annular groove 92 is provided with multiple groups of blowing holes 93 on the side close to the air bag 11. The multiple groups of blowing holes 93 are evenly distributed on one side of the annular groove 92, and the blowing holes 93 between the two adjacent groups of annular grooves 92 are staggered. The bottom end of the air bag 11 is provided with an air inlet 91. An air inlet and outlet 12 is provided on the side close to the fixing ring 9, and the air inlet and outlet 12 is connected to the air inlet hole 91 through a connecting pipe. The upper and lower ends of the airbag 11 are fixedly connected with an electromagnet 13. By setting the electromagnet 13, the airbag 11 can be squeezed to generate gas as a storage power source; the outer surface of the first-level column 6 and the second-level column 7 and the side close to the airbag 11 are fixedly connected with a control box 14 through a fixing frame, and a controller and a battery are set in the control box 14. The electromagnets 13 are electrically connected to the controller and the battery. By setting the battery, it is convenient to power the electromagnet 13 and the controller.

[0027] As an embodiment of the present invention, the opening of the blowing hole 93 is tilted downward by 30°-45°, which helps the gas to blow away the dust on the surface of the airbag 11.

[0028] As an embodiment of the present invention, the outer diameter of the lower end of the scraper 8 is larger than the outer diameter of the fixing ring 9, so that the dust scraped off by the scraper 8 falls into the upper end of the airbag 11, thereby reducing the dust falling between the airbag 11 and the fixing ring 9 during the extrusion process of the airbag 11 and increasing the wear on the surface of the airbag 11.

[0029] As an embodiment of the present invention, the cross section of the scraper 8 is a trapezoidal structure, which helps dust fall to the upper end of the airbag 11 for easy cleaning.

[0030] As an embodiment of the present invention, multiple sets of one-way valves 10 are fixedly connected to the inner wall of the air inlet 91 and located below the annular groove 92. The one-way valves 10 are provided to control the flow of gas to prevent the airbag 11 from being squeezed to the maximum limit and the gas being insufficient to blow away the dust on the surface of the airbag 11.

[0031] As an embodiment of the present invention, the flow direction of the one-way valve 10 is from bottom to top, which can ensure that the gas is discharged from the blowing hole 93 during the squeezing process of the airbag 11.

[0032] As an embodiment of the present invention, the working air pressure value of the one-way valve 10 increases successively from bottom to top. When the airbag 11 begins to squeeze, the one-way valve 10 at the lowest end opens first, but the blowing hole 93 at the bottom is blocked by the airbag 11 and the gas cannot be discharged. Therefore, the increase in air pressure value will open the next one-way valve 10 until the gas can be discharged from the blowing hole 93, thereby controlling the flow of gas.

[0033] Working principle: When in use, move the device to the working area, and then support the top beam 4 through the column. At the same time, when the piston slides downward, the scraper 8 can scrape off the dust adsorbed on the surface of the piston and drop it to the outer end surface of the airbag 11. Then, the controller controls the electromagnet 13 to be energized so that the electromagnets 13 at both ends of the airbag 11 attract each other, thereby squeezing the airbag 11 to generate gas. Then, the gas flows into the air inlet 91 through the air inlet and outlet 12, and then the gas opens the one-way valve 10 from the air inlet 91 and flows into the annular groove 92, and then falls to the upper surface of the airbag 11 through the blowing hole 93. The airbag 11 is squeezed to its maximum limit, and the magnetic poles of the electromagnet 13 are controlled by the controller to repel each other, so that the two electromagnets 13 are separated from each other, and the airbag can be restored to its original state. The above operation is repeated until the dust on the surface of the airbag 11 is cleaned, and finally the electromagnet 13 is powered off by the controller. This setting can clean the dust on the surface of the piston, and can prevent the cleaned dust from accumulating around the piston, causing wear on the surface of the piston when the column rotates, resulting in slow rotation of the column, thereby increasing the service life and reducing safety hazards.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An adjustable hydraulic support, comprising a base (1), characterized in that: The right outer surface of the base (1) is rotatably connected to a first support plate (2), an end of the first support plate (2) away from the base (1) is rotatably connected to a second support plate (3), an end of the second support plate (3) away from the first support plate (2) is rotatably connected to a top beam (4), an upper end of the base (1) is fixedly connected to a mounting seat (5) on a side close to the first support plate (2), an upper end of the mounting seat (5) is fixedly connected to a first column (6), an inner portion of the first column (6) is slidably connected to a first active column (61), an upper end of the first active column (61) is rotatably connected to a first active column (61), and a first active column (61) is fixedly connected to a first active column (61). The bottom ends of the two support plates (3) are hinged, the upper end of the base (1) is located on the left side of the mounting seat (5) and is fixedly connected with two groups of secondary columns (7), the secondary columns (7) are internally movably connected with secondary active columns (71), the upper ends of the secondary active columns (71) are hinged with the lower end of the top beam (4), the upper ends of the primary columns (6) and the upper ends of the secondary columns (7) are both provided with fixing rings (9), the other end of the fixing ring (9) is fixedly connected with a scraper (8), the inner wall of the scraper (8) is slidably connected with the outer surfaces of the primary active column (61) and the secondary active column (71) respectively; The outer surface of the fixing ring (9) is sleeved with an air bag (11), and an air inlet (91) is provided on a side of the fixing ring (9) close to the air bag (11), and a plurality of annular grooves (92) are provided on a side of the air inlet (91) close to the air bag (11), and a plurality of blowing holes (93) are provided on a side of the annular groove (92) close to the air bag (11), and the plurality of blowing holes (93) are evenly distributed in an annular shape on one side of the annular groove (92), and the blowing holes (93) between two adjacent groups of the annular groove (92) are staggered. An air inlet and outlet (12) is provided at the bottom end of the air bag (11) and on a side close to the fixing ring (9), and the air inlet and outlet (12) are connected to the air inlet hole (91) through a connecting pipe. The upper and lower ends of the air bag (11) are fixedly connected to electromagnets (13). The outer surfaces of the first-level column (6) and the second-level column (7) and on a side close to the air bag (11) are fixedly connected to a control box (14) through a fixing frame. A controller and a battery are provided in the control box (14), and the electromagnets (13) are electrically connected to the controller and the battery. The opening of the blowing hole (93) is tilted 30°-45° downward.

2. The adjustable hydraulic support according to claim 1, characterized in that: The outer diameter of the lower end of the scraper (8) is larger than the outer diameter of the fixing ring (9).

3. The adjustable hydraulic support according to claim 1, characterized in that: The cross section of the scraper (8) is a trapezoidal structure.

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