Flat top type telescopic supporting structure of paste filling hydraulic support

Abstract

The utility model discloses a flat top type telescopic supporting structure of a paste filling hydraulic support, which belongs to the technical field of telescopic supporting and comprises a fixed top beam cross arm and a telescopic top beam cross arm, and the telescopic top beam cross arm is mounted in the fixed top beam cross arm. An oil cavity is formed in the middle of the interior of the telescopic top beam cross arm, a plurality of flat-top cavities are formed in the two sides of the oil cavity in a communicating mode, flat-top supporting columns are installed in the flat-top cavities, and flat-top supports are connected to the tops of the flat-top supporting columns; the interior of the oil cavity is filled with oil, and a telescopic hydraulic cylinder is installed at the end of the oil cavity. According to the structure, oil can be continuously pushed into the flat top cavity through the piston assembly of the telescopic hydraulic cylinder, and the flat top support ascends to be flush with the top surface of the fixed top beam cross arm under the action of hydraulic pressure, so that the height difference between the top surface of the fixed top beam cross arm and the top surface of the telescopic top beam cross arm is effectively filled up; therefore, the fixed top beam cross arm and the telescopic top beam cross arm are more stable when supporting the mine together.

Description

Technical Field

[0001] This utility model relates to the field of telescopic support technology, specifically a flat-top telescopic support structure for a paste filling hydraulic support. Background Technology

[0002] Paste-filled hydraulic supports are indispensable support equipment in backfilling mining operations. They are mainly used in coal mines and other mining processes, especially in situations where coal is under pressure from three sources (buildings, railways, and water bodies). Through paste-filling technology, green mining and environmental protection can be achieved in the mining area.

[0003] In existing patent literature, there is a patent with publication number CN 118442098 A entitled "Split Connection Structure of Split-type Paste Filling Hydraulic Support". This patent is used for the front and rear top beams of the mine top support, which can be telescopic. However, since the telescopic arm is located inside the front and rear top beams, when the telescopic arm is extended, there will be a certain height difference between the top surface of the telescopic arm and the top surface of the front / rear top beam. This makes the top surface of the telescopic arm not completely in contact with the mine top, resulting in insufficient stability when it is used for support. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a flat-top telescopic support structure for a paste filling hydraulic support. This structure can continuously push oil into the flat-top cavity through the piston assembly of the telescopic hydraulic cylinder. Under the action of hydraulic pressure, the flat-top support rises to be flush with the top surface of the fixed top beam crossarm, effectively filling the height difference between the top surface of the fixed top beam crossarm and the top surface of the telescopic top beam crossarm. Therefore, the fixed top beam crossarm and the telescopic top beam crossarm will be more stable when supporting the mine together.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is implemented as follows:

[0006] A flat-top telescopic support structure for a paste-filling hydraulic support includes a fixed top beam crossarm and a telescopic top beam crossarm, wherein the telescopic top beam crossarm is installed inside the fixed top beam crossarm; the fixed top beam crossarm is used at the top of the mine hydraulic support part in the paste-filling hydraulic support, and can support the top of the mine through the fixed top beam crossarm; when the telescopic top beam crossarm extends from inside the fixed top beam crossarm, it can further increase the support area for the top of the mine;

[0007] A base is installed at the end of the telescopic top beam crossarm, and a motor is installed on the base. A drive screw is concentrically connected to the motor shaft. The drive screw is threaded to the vertical plate inside the fixed top beam crossarm. The telescopic top beam crossarm can be extended and retracted inside the fixed top beam crossarm by rotating the screw driven by the motor.

[0008] The telescopic top beam crossarm has an oil chamber in the middle, and multiple flat-top cavities arranged in a linear array are connected to both sides of the oil chamber; flat-top columns are vertically installed in the flat-top cavities, and flat-top supports are connected to the top of the flat-top columns.

[0009] The oil chamber is filled with oil, and a telescopic hydraulic cylinder is installed at its end to drive the oil feed; the piston assembly of the telescopic hydraulic cylinder can continuously push the oil into the flat top chamber, and under the action of hydraulic pressure, the flat top support rises to be flush with the top surface of the fixed top beam cross arm.

[0010] Using the above scheme, the structure can continuously push oil into the flat top cavity through the piston assembly of the telescopic hydraulic cylinder. Under the action of hydraulic pressure, the flat top support rises to be flush with the top surface of the fixed top beam crossarm, effectively filling the height difference between the top surface of the fixed top beam crossarm and the top surface of the telescopic top beam crossarm. Therefore, the fixed top beam crossarm and the telescopic top beam crossarm will be more stable when they jointly support the mine.

[0011] In a preferred embodiment of a flat-top telescopic support structure for a paste-filling hydraulic support, the diameter of the flat-top support is larger than the diameter of the flat-top column; multiple anti-slip grooves are formed on the upper surface of the flat-top support.

[0012] To further enhance the support effect, the diameter of the flat-top support is designed to be larger, which increases its support area with the top of the mine. By creating anti-slip grooves, the friction between the two after they come into contact can be increased.

[0013] In a preferred embodiment of a flat-top telescopic support structure for a paste-filling hydraulic support, sealing sleeves are detachably installed on the bottom of the flat-top support column and on the piston assembly of the telescopic hydraulic cylinder; the piston assembly of the telescopic hydraulic cylinder is press-fitted with the inner wall of the oil chamber through the sealing sleeve, and the bottom of the flat-top support column is press-fitted with the inner wall of the flat-top cavity through the sealing sleeve.

[0014] In order to improve the sealing performance of the flat-top support and piston assembly, the above solution involves detachable installation of sealing sleeves on both. When the sealing sleeves wear out and can no longer guarantee the sealing effect, they can be easily replaced in a timely manner.

[0015] In a preferred embodiment of a flat-top telescopic support structure for a paste-filling hydraulic support, an annular reset seat is fixed to the side of the flat-top support column. Above the annular reset seat, multiple guide shafts are fixed in a circumferential array around the flat-top support column. Each guide shaft is fitted with a reset spring that pushes the flat-top support column downward to reset.

[0016] In order to achieve the elastic reset of the flat-top support using the above scheme, before the telescopic top beam crossarm retracts into the fixed top beam crossarm, the piston assembly of the telescopic hydraulic cylinder retracts first, which reduces the oil pressure in the flat-top cavity. At this time, the flat-top support can be quickly reset under the elastic push of the reset spring. After reset, the flat-top support remains flush with the top of the telescopic top beam crossarm.

[0017] In a preferred embodiment of a flat-top telescopic support structure for a paste-filled hydraulic support, an oil inlet is provided at the top of the oil chamber, and an oil cap is detachably and sealed at the oil inlet.

[0018] Using the above method, to facilitate the addition or replacement of oil, the oil can be added or replaced by opening the oil cap.

[0019] After adopting the above technical solution, the beneficial effects of this utility model are:

[0020] 1. This structure can continuously push oil into the flat top cavity through the piston assembly of the telescopic hydraulic cylinder. Under the action of hydraulic pressure, the flat top support rises to be flush with the top surface of the fixed top beam cross arm, effectively filling the height difference between the top surface of the fixed top beam cross arm and the top surface of the telescopic top beam cross arm. Therefore, the fixed top beam cross arm and the telescopic top beam cross arm will be more stable when supporting the mine together.

[0021] 2. To further improve the support effect, the diameter of the flat-top support is designed to be larger, which can increase its support area with the top of the mine; by opening anti-slip grooves, the friction between the two after contact can be increased.

[0022] 3. In order to improve the sealing performance of the flat top support and piston assembly, sealing sleeves are detachably installed on both. When the sealing sleeves are worn and can no longer guarantee the sealing effect, it is convenient to replace the sealing sleeves in a timely manner.

[0023] 4. In order to achieve the elastic reset of the flat top support, when the telescopic top beam cross arm retracts into the fixed top beam cross arm, the piston assembly of the telescopic hydraulic cylinder retracts first, which reduces the oil pressure in the flat top cavity. At this time, the flat top support can be quickly reset under the elastic push of the reset spring. After reset, the flat top support remains flush with the top of the telescopic top beam cross arm.

[0024] 5. To facilitate the addition or replacement of oil, the oil can be added or replaced by opening the oil cap. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention applied to a hydraulic support for paste filling;

[0027] Figure 2 For horizontal display Figure 8 A three-dimensional structural diagram of the internal structure;

[0028] Figure 3 for Figure 1 3D structural diagram of the telescopic top beam crossarm;

[0029] Figure 4 For horizontal display Figure 3 A three-dimensional structural diagram of the internal structure;

[0030] Figure 5 To showcase Figure 3 A three-dimensional structural diagram showing the distribution of the oil cavity and the flat-top cavity;

[0031] Figure 6 For vertical display Figure 3 Three-dimensional structure of the interior Figure 1 ;

[0032] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0033] Figure 8 For vertical display Figure 3 Three-dimensional structure of the interior Figure 2 ;

[0034] Figure 9 for Figure 8 A magnified view of a section at point B in the middle;

[0035] Figure 10 for Figure 7 A three-dimensional structural diagram of the central flat-top support column.

[0036] Markings in the diagram: 1-Fixed top beam crossarm; 2-Telescopic top beam crossarm; 3-Base; 4-Motor; 5-Drive screw; 6-Oil chamber; 7-Telescopic hydraulic cylinder; 8-Flat top chamber; 9-Flat top support; 10-Flat top support; 11-Sealing sleeve; 12-Annular reset seat; 13-Guide shaft; 14-Reset spring; 15-Oil cap. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one main embodiment of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] like Figures 1 to 10 As shown, a flat-top telescopic support structure for a paste-filling hydraulic support includes a fixed top beam crossarm 1 and a telescopic top beam crossarm 2, wherein the telescopic top beam crossarm 2 is installed inside the fixed top beam crossarm 1; the fixed top beam crossarm 1 is used at the top of the mine hydraulic support part in the paste-filling hydraulic support, and can support the top of the mine through the fixed top beam crossarm 1; when the telescopic top beam crossarm 2 extends from inside the fixed top beam crossarm 1, it can further increase the support area for the top of the mine; the end of the telescopic top beam crossarm 2 is equipped with a base 3 by screws, and a motor 4 is installed on the base 3. A drive screw 5 is concentrically connected to the shaft of the motor 4, and the drive screw 5 is threaded to the inside of the fixed top beam crossarm 1. The telescopic top beam crossarm 2, in conjunction with the vertical plate, can extend and retract within the fixed top beam crossarm 1 by rotating the screw 5 driven by the motor 4. An oil chamber 6 is provided in the middle of the telescopic top beam crossarm 2, and multiple linearly arrayed flat-top chambers 8 are connected to both sides of the oil chamber 6. A flat-top support column 9 is vertically installed inside the flat-top chamber 8, and a flat-top support 10 is connected to the top of the flat-top support column 9. The oil chamber 6 is filled with oil, and a telescopic hydraulic cylinder 7 for driving the oil feed is installed at its end by screws. The piston assembly of the telescopic hydraulic cylinder 7 continuously pushes the oil into the flat-top chamber 8, causing the flat-top support 10 to rise to be flush with the top surface of the fixed top beam crossarm 1 under hydraulic pressure. This structure uses the piston assembly of the telescopic hydraulic cylinder 7 to continuously push oil into the flat top cavity 8. Under the action of hydraulic pressure, the flat top support 10 rises to be flush with the top surface of the fixed top beam cross arm 1, effectively filling the height difference between the top surface of the fixed top beam cross arm 1 and the top surface of the telescopic top beam cross arm 2. Therefore, the fixed top beam cross arm 1 and the telescopic top beam cross arm 2 will be more stable when they jointly support the mine.

[0039] like Figure 10 As shown, the diameter of the flat-top support 10 is larger than the diameter of the flat-top support column 9; multiple anti-slip grooves are formed on the upper surface of the flat-top support 10. In order to further improve the support effect, the diameter of the flat-top support 10 is designed to be larger, which can increase its support area with the top of the mine; by forming anti-slip grooves, the friction force after the two come into contact can be increased.

[0040] like Figure 4 , Figures 6 to 10As shown, sealing sleeves 11 are detachably installed on the bottom of the flat-top support 9 and the piston assembly of the telescopic hydraulic cylinder 7 via screws. The piston assembly of the telescopic hydraulic cylinder 7 is press-fitted with the inner wall of the oil chamber 6 via the sealing sleeves 11, and the bottom of the flat-top support 9 is press-fitted with the inner wall of the flat-top cavity 8 via the sealing sleeves 11. To improve the sealing performance of the flat-top support 9 and the piston assembly, sealing sleeves 11 are detachably installed on both. When the sealing sleeves 11 wear out and can no longer guarantee the sealing effect, it is convenient to replace the sealing sleeves 11 in a timely manner.

[0041] like Figures 6 to 10 As shown, a ring-shaped reset seat 12 is also fixed to the side of the flat-top support 9. Above the ring-shaped reset seat 12, multiple guide shafts 13 are fixed in a circumferential array around the flat-top support 9. Each guide shaft 13 is fitted with a reset spring 14 to push the flat-top support 9 downward to reset. In order to achieve the elastic reset of the flat-top support 9, before the telescopic top beam cross arm 2 retracts into the fixed top beam cross arm 1, the piston assembly of the telescopic hydraulic cylinder 7 retracts first, which reduces the oil pressure in the flat-top cavity 8. At this time, under the elastic push of the reset spring 14, the flat-top support 9 can quickly reset. After reset, the flat-top support 10 remains flush with the top of the telescopic top beam cross arm 2.

[0042] like Figure 3 As shown, an oil inlet is provided at the top of the oil chamber 6, and an oil cap 15 is installed at the oil inlet using a screw-removable sealing method. To facilitate the addition or replacement of oil, the oil can be added or replaced by opening the oil cap 15.

[0043] The working principle of this utility model:

[0044] Before application, the fixed top beam cross arm 1 is fixed to the top of the mine hydraulic support part in the paste filling hydraulic support with bolts and nuts. The fixed top beam cross arm 1 can support the top of the mine. When the telescopic top beam cross arm 2 extends out from the inside of the fixed top beam cross arm 1, it can further increase the support area for the top of the mine.

[0045] In application, the extension and retraction of the telescopic roof beam crossarm 2 within the fixed roof beam crossarm 1 is achieved by the rotation of the screw 5 driven by the motor 4. When the telescopic roof beam crossarm 2 extends beyond the fixed roof beam crossarm 1, the piston assembly of the telescopic hydraulic cylinder 7 extends and continuously pushes oil into the flat top cavity 8, causing the flat top support 10 to rise under hydraulic pressure. If the flat top support 10 has already extended beyond the fixed roof beam crossarm 1, it will be flush with the top surface of the fixed roof beam crossarm 1, jointly supporting the mine top. Figures 7 to 8 As shown; if the flat-top support 10 is still within the fixed top beam crossarm 1, the flat-top support 10 will not rise due to interference from the fixed top beam crossarm 1, as... Figures 8 to 9 As shown.

[0046] Before the telescopic top beam crossarm 2 retracts into the fixed top beam crossarm 1, the piston assembly of the telescopic hydraulic cylinder 7 retracts first, causing the oil pressure in the flat top chamber 8 to decrease. At this time, the flat top support 9 can quickly reset under the elastic push of the return spring 14. After resetting, the flat top support 10 remains flush with the top of the telescopic top beam crossarm 2.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flat-top telescopic support structure for a paste filling hydraulic support, comprising a fixed top beam crossarm (1) and a telescopic top beam crossarm (2), wherein the telescopic top beam crossarm (2) is installed inside the fixed top beam crossarm (1). The telescopic top beam crossarm (2) is equipped with a base (3) at its end. A motor (4) is installed on the base (3). A drive screw (5) is concentrically connected to the shaft of the motor (4). The drive screw (5) is threaded into the vertical plate inside the fixed top beam crossarm (1). The telescopic top beam crossarm (2) can be extended and retracted inside the fixed top beam crossarm (1) by the rotation of the drive screw (5) driven by the motor (4). Its features are: The telescopic top beam cross arm (2) has an oil cavity (6) in the middle, and the oil cavity (6) is connected to multiple flat-top cavities (8) arranged in a linear array on both sides; a flat-top support column (9) is vertically installed in the flat-top cavity (8), and a flat-top support (10) is connected to the top of the flat-top support column (9). The oil chamber (6) is filled with oil, and a telescopic hydraulic cylinder (7) for driving the oil feed is installed at its end; the piston assembly of the telescopic hydraulic cylinder (7) can continuously push the oil into the flat top chamber (8), and under the action of hydraulic pressure, the flat top support (10) rises to be flush with the top surface of the fixed top beam cross arm (1).

2. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 1, characterized in that: The diameter of the flat-top support (10) is larger than the diameter of the flat-top support (9).

3. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 2, characterized in that: The upper surface of the flat-top support (10) has multiple anti-slip grooves.

4. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 3, characterized in that: Sealing sleeves (11) are detachably installed on the bottom of the flat-top support (9) and on the piston assembly of the telescopic hydraulic cylinder (7).

5. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 4, characterized in that: The piston assembly of the telescopic hydraulic cylinder (7) is press-fitted with the inner wall of the oil chamber (6) through a sealing sleeve (11), and the bottom of the flat-top support (9) is press-fitted with the inner wall of the flat-top cavity (8) through a sealing sleeve (11).

6. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 5, characterized in that: The side of the flat-top support (9) is also fixed with an annular reset seat (12). Above the annular reset seat (12) are multiple guide shafts (13) arranged in a circumferential array around the flat-top support (9). Each guide shaft (13) is fitted with a reset spring (14) that pushes the flat-top support (9) to move downward and reset.

7. The flat-top telescopic support structure of the paste filling hydraulic support according to claim 6, characterized in that: The top of the oil chamber (6) is provided with an oil inlet, and an oil cap (15) is installed at the oil inlet in a detachable and sealed manner.

8. The flat-top telescopic support structure of the paste filling hydraulic support according to any one of claims 1-7, characterized in that: The fixed top beam cross arm (1) is applied to the top of the hydraulic support part of the mine in the paste filling hydraulic support. The fixed top beam cross arm (1) can support the top of the mine. When the telescopic top beam cross arm (2) extends out from the inside of the fixed top beam cross arm (1), it can further increase the support area of ​​the top of the mine.

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