Overlapped stack type hydraulic support with super-large working resistance

Abstract

The utility model discloses a superlarge working resistance stacking type hydraulic support, and relates to the technical field of coal mining auxiliary equipment. Comprising a base, first connecting mechanisms are arranged on the lower side wall of the base close to the front and rear positions in a rectangular shape, first side sealing mechanisms are installed on the upper surface of the base close to the front and rear edges, and four hydraulic telescopic stand columns are arranged in the middle of the inner wall of the lower side of the base; the upper surface of the hydraulic telescopic stand column is connected with the inner wall of the upper side of the top beam through a first hinge piece, a stabilizing mechanism is arranged between the right end of the base and the right end of the top beam, a second connecting mechanism is arranged on the upper surface of the top beam, and a fixed pulling plate is installed in the second connecting mechanism. According to the utility model, the support requirement of a common mining height stope face retracement roadway is met when a single support is used, the support requirement of a super-large mining height working face retracement roadway is met when the single support is vertically overlapped and spliced, the use requirements of large initial supporting force and large working resistance are met, meanwhile, the shield and protection performance is better, and the use is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for coal mining, in particular to a super-large working resistance stacked hydraulic support. Background Technique

[0002] With the continuous improvement of coal mining and equipment manufacturing technologies, the mining height of fully-mechanized top coal caving faces in thick coal seams has also increased correspondingly, and the working resistance and structural dimensions of support equipment have gradually increased. This trend has brought about an improvement in production efficiency and the large-scale and heavy-duty of equipment dimensions.

[0003] In the prior art, the working resistance of the crib-type supports in the industry is relatively small, and they cannot fully meet the support requirements for the withdrawal channels of super-large mining height faces in terms of support strength. There are certain limitations in terms of structural height. The number of conventional super-large mining height faces is small, and the frequency of withdrawal and relocation of super-large mining height faces is low. For the withdrawal roadway of large mining height faces, the hydraulic telescopic ratio of a single-structure crib-type is relatively small, and it can only be applied to roadways with relatively large height dimensions. It cannot be fully applied to the lower withdrawal roadways of ordinary working faces. That is, on the premise of meeting the requirements of high support height, the minimum transportation height of the super-large mining height crib-type hydraulic support is relatively large, and it cannot meet the support requirements for the withdrawal roadways of ordinary working faces. At present, the working resistance of the crib-type supports for the withdrawal and relocation of conventional working faces in China is below 25000 KN, which is difficult to fully meet the design and use requirements of large working resistance for super-large mining height faces. The structural height of a single support is at least 3.5 m and at most 6.5 m. While basically meeting the support requirements for the withdrawal of super-large mining height faces, it cannot meet the support requirements for the withdrawal channels of ordinary fully-mechanized coal mining faces lower than 3.5 m. At the same time, during the support process, there is a lack of support for the side walls, and there is also a problem of coal leakage on the side. Content of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a super-large working resistance stacked hydraulic support to solve the problems put forward in the above background technique.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present utility model provides the following technical solutions: an ultra-large working resistance stacked hydraulic support, including a base. The lower side wall of the base is provided with a first connection mechanism in a rectangular shape near the front and rear positions. Two first pin holes are opened at the middle position of the lower surface of the base. A side push mechanism is arranged on the front side wall of the base. First side sealing mechanisms are installed on the upper surface of the base near the front and rear edges. Four hydraulic telescopic columns are arranged at the middle position of the lower inner wall of the base. The upper surface of the hydraulic telescopic column is connected to the upper inner wall of the roof beam through a first hinge. A stabilizing mechanism is arranged between the right end of the base and the right end of the roof beam. Second side sealing mechanisms are arranged on the front and rear side walls of the roof beam. A second connection mechanism is arranged on the upper surface of the roof beam. A fixed pull plate is installed in the second connection mechanism. Two second pin holes are opened at the middle position of the upper surface of the roof beam. A positioning pin shaft is inserted into the second pin hole.

[0008] As a preferred technical solution of the present utility model, the first connection mechanism includes a slot, a jack, a fixing pin and a limit pin assembly. A slot for inserting the fixed pull plate is opened on the lower surface of the base. Jacks are opened on the side wall of the base corresponding to the slot and on the fixed pull plate, and a fixing pin is inserted into the jack. The fixing pin is limited and fixed to the side wall of the base through the limit pin assembly.

[0009] As a preferred technical solution of the present utility model, the second connection mechanism has the same structure as the first connection mechanism.

[0010] As a preferred technical solution of the present utility model, the side push mechanism includes a first hydraulic telescopic rod and a push plate. There are two first hydraulic telescopic rods arranged left and right, and the first hydraulic telescopic rods are installed in the base. The front side of the output shaft of the first hydraulic telescopic rod is fixedly installed with a push plate.

[0011] As a preferred technical solution of the present utility model, the lower surface of the hydraulic telescopic column is in an arc shape, and the position on the lower inner wall of the base corresponding to the lower surface of the hydraulic telescopic column is in an arc groove shape.

[0012] As a preferred technical solution of the present utility model, the first side sealing mechanism includes a mounting frame, a second hinge, a third hinge, a second hydraulic telescopic rod, a fourth hinge and a baffle. The lower end of the mounting frame is evenly connected to the upper surface of the base through the second hinge. The middle position of the mounting frame is connected to the output shaft of the second hydraulic telescopic rod through the third hinge. The lower end of the second hydraulic telescopic rod is connected to the upper surface of the base through the fourth hinge. A baffle is fixedly installed on the mounting frame.

[0013] As a preferred technical solution of the present utility model, the second side sealing mechanism has the same structure as the first side sealing mechanism.

[0014] As a preferred technical solution of the present utility model, the stabilizing mechanism includes a connecting rod, a fifth hinge member, a sixth hinge member, a shield beam, and a seventh hinge member. There are four connecting rods, and the lower end of the connecting rod is connected to the base through the fifth hinge member. The upper end of the connecting rod is connected to the lower end of the shield beam through the sixth hinge member. The upper end of the shield beam is connected to the right end of the top beam through the seventh hinge member.

[0015] As a preferred technical solution of the present utility model, connecting plates are provided on both the left and right sides of the base, and through holes are provided in the connecting plates.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present utility model provides an ultra-large working resistance stacked hydraulic support, which has the following beneficial effects:

[0018] 1. For the ultra-large working resistance stacked hydraulic support, by setting up a single hydraulic support composed of a base, a hydraulic telescopic column, a stabilizing mechanism, and an upper top beam, the single hydraulic support can meet the support requirements of the retreat roadway in the ordinary mining height working face. Through the second connection mechanism on the upper surface of the lower support top beam, the first connection mechanism on the lower surface of the upper stacked base, and the fixed pull plate connection mechanism, the hydraulic supports can be stacked up and down. Stacking up and down can meet the support requirements of the retreat roadway in the ultra-large mining height working face and meet the use requirements of large initial support force and large working resistance.

[0019] 2. For the ultra-large working resistance stacked hydraulic support, by setting up a side push mechanism to increase the support area of the base and pressing tightly against the side wall of the roadway, and then preventing coal from falling through the front and rear first side sealing mechanisms and the second side sealing mechanism, it can effectively prevent gangue from falling, play a certain role in preventing the support from toppling, have good shielding and protection performance, and be safer to use. Description of the drawings

[0020] Figure 1 It is a front view structural schematic diagram of an ultra-large working resistance stacked hydraulic support proposed by the present utility model;

[0021] Figure 2 It is a rear view of an ultra-large working resistance stacked hydraulic support proposed by the present utility model;

[0022] Figure 3 It is a bottom view of an ultra-large working resistance stacked hydraulic support proposed by the present utility model;

[0023] Figure 4 It is a front view exploded view of an ultra-large working resistance stacked hydraulic support proposed by the present utility model;

[0024] Figure 5 An upward decomposition view of an ultra-large working resistance stacked hydraulic support proposed by the present utility model;

[0025] Figure 6 A schematic diagram of the upper and lower stacking structure of an ultra-large working resistance stacked hydraulic support proposed by the present utility model.

[0026] In the figure: 1, base; 2, first connection mechanism; 201, slot; 202, jack; 203, fixing pin; 204, limit pin assembly; 3, first pin hole; 4, side push mechanism; 401, first hydraulic telescopic rod; 402, push plate; 5, first side sealing mechanism; 501, mounting bracket; 502, second hinge; 503, third hinge; 504, second hydraulic telescopic rod; 505, fourth hinge; 506, baffle; 6, hydraulic telescopic column; 7, first hinge; 8, roof beam; 9, stabilizing mechanism; 901, connecting rod; 902, fifth hinge; 903, sixth hinge; 904, shield beam; 905, seventh hinge; 10, second side sealing mechanism; 11, second connection mechanism; 12, fixing pull plate; 13, second pin hole; 14, positioning pin shaft; 15, connecting plate; 16, through hole. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-6, a super-large working resistance stacked hydraulic support, including a base 1. The lower side wall of the base 1 is provided with a first connection mechanism 2 in a rectangular shape near the front and rear positions. Two first pin holes 3 are opened at the middle position of the lower surface of the base 1. A side push mechanism 4 is arranged on the front side wall of the base 1. First side sealing mechanisms 5 are installed at the front and rear edge positions of the upper surface of the base 1. Four hydraulic telescopic columns 6 are arranged at the middle position of the lower inner wall of the base 1. The hydraulic telescopic columns 6 use four double-acting columns with a cylinder diameter of φ450 as the power support. The initial support force reaches 20029 KN. The unloading pressure of the safety valve in the lower cavity of the hydraulic telescopic columns 6 is adjusted to 47.2 MPa, and the working resistance can reach 30000 KN. The upper surface of the hydraulic telescopic columns 6 is connected to the upper inner wall of the roof beam 8 through a first hinge 7. A stabilizing mechanism 9 is arranged between the right end of the base 1 and the right end of the roof beam 8. Second side sealing mechanisms 10 are arranged on the front and rear side walls of the roof beam 8. A second connection mechanism 11 is arranged on the upper surface of the roof beam 8. A fixed pull plate 12 is installed in the second connection mechanism 11. Two second pin holes 13 are opened at the middle position of the upper surface of the roof beam 8. A positioning pin shaft 14 is inserted into the second pin holes 13. The designed width of this stacked support is 1.7 m, the minimum retracted height is 2.1 m, and the maximum extended height is 3.6 m. Single-frame use meets the support requirements of the retreat roadway in the ordinary mining height working face, and the upper and lower stacked use meets the support requirements of the retreat roadway in the super-large mining height working face, and the roadway height is not greater than 7.0 m.

[0029] Specifically, the first connection mechanism 2 includes a slot 201, a jack 202, a fixing pin 203 and a limit pin assembly 204. A slot 201 for inserting the fixed pull plate 12 is opened on the lower surface of the base 1. Jacks 202 are opened on the side wall of the base 1 corresponding to the slot 201 and on the fixed pull plate 12, and a fixing pin 203 is inserted into the jacks 202. The fixing pin 203 is limited and fixed to the side wall of the base 1 through the limit pin assembly 204.

[0030] In this implementation plan, the slot 201 is used for inserting the fixed pull plate 12. The fixing pin 203 is inserted into the jacks 202 on the side wall of the base 1 and the fixed pull plate 12, and then the fixing pin 203 is limited and fixed through the limit pin assembly 204, so that the fixed pull plate 12 is connected and fixed to the base 1.

[0031] Specifically, the second connection mechanism 11 has the same structure as the first connection mechanism 2.

[0032] In this implementation plan, the second connection mechanism 11 connects and fixes the roof beam 8 and the fixed pull plate 12.

[0033] Specifically, the side pushing mechanism 4 includes a first hydraulic telescopic rod 401 and a push plate 402. There are two first hydraulic telescopic rods 401 arranged left and right, and the first hydraulic telescopic rod 401 is installed in the base 1. A push plate 402 is fixedly installed on the front side of the output shaft of the first hydraulic telescopic rod 401.

[0034] In this implementation scheme, the output shafts of the left and right first hydraulic telescopic rods 401 drive the push plate 402 to move, which can push the gangue away, make the support stable, and increase the support area of the lower surface.

[0035] Specifically, the lower surface of the hydraulic telescopic column 6 is of an arc-shaped structure, and the lower inner wall of the base 1 has an arc-shaped groove structure corresponding to the lower surface of the hydraulic telescopic column 6.

[0036] In this implementation scheme, the bottom end of the hydraulic telescopic column 6 is placed in the casting cavity of the base, making the installation of the hydraulic telescopic column 6 stable and firm.

[0037] Specifically, the first side sealing mechanism 5 includes a mounting frame 501, a second hinge 502, a third hinge 503, a second hydraulic telescopic rod 504, a fourth hinge 505 and a baffle 506. The lower end heads of the mounting frame 501 are evenly connected to the upper surface of the base 1 through the second hinge 502. A position near the middle of the mounting frame 501 is connected to the output shaft of the second hydraulic telescopic rod 504 through the third hinge 503. The lower end head of the second hydraulic telescopic rod 504 is connected to the upper surface of the base 1 through the fourth hinge 505. A baffle 506 is fixedly installed on the mounting frame 501.

[0038] In this implementation scheme, the second hinge 502 enables the mounting frame 501 to have a folding and opening function. The second hydraulic telescopic rod 504 between the third hinge 503 and the fourth hinge 505 drives the mounting frame 501 to unfold, and the mounting frame 501 drives the baffle 506 to unfold, so that the baffle 506 prevents the lower side gangue.

[0039] Specifically, the second side sealing mechanism 10 has the same structure as the first side sealing mechanism 5.

[0040] In this implementation scheme, after the second side sealing mechanism 10 is unfolded, it is horizontally flush with the upper surface of the top beam 8, which can prevent the upper side gangue, increase the support area, and further improve the stability of the support.

[0041] Specifically, the stabilizing mechanism 9 includes a connecting rod 901, a fifth hinge 902, a sixth hinge 903, a shield beam 904, and a seventh hinge 905. There are four connecting rods 901, and the lower end of the connecting rod 901 is connected to the base 1 through the fifth hinge 902. The upper end of the connecting rod 901 is connected to the lower end of the shield beam 904 through the sixth hinge 903. The upper end of the shield beam 904 is connected to the right end of the top beam 8 through the seventh hinge 905.

[0042] In this embodiment, the fifth hinge 902 and the sixth hinge 903 enable the connecting rod 901 to be movably connected to the base 1 and the lower end of the shield beam 904. The shield beam 904 is movably connected to the top beam 8 through the seventh hinge 905, guiding the top beam 8 during the up and down movement of the top beam 8, making the up and down movement process of the top beam 8 more stable.

[0043] Specifically, connecting plates 15 are provided on both the left and right sides of the base 1, and through holes 16 are formed in the connecting plates 15.

[0044] In this embodiment, the through holes 16 in the connecting plates 15 facilitate the connection and fixation between adjacent supports through connection pins.

[0045] Working principle and usage process of the utility model: When in use, a single hydraulic support composed of a base 1, four hydraulic telescopic columns 6, a stabilizing mechanism 9, and an upper side crossbeam 8 drives the crossbeam 8 to move up and down through the output shafts of the four hydraulic telescopic columns 6. During the up and down movement of the crossbeam 8, the fifth hinge 902 and the sixth hinge 903 enable the connecting rod 901 to be movably connected to the base 1 and the lower end of the shield beam 904. The shield beam 904 is movably connected to the crossbeam 8 through the seventh hinge 905, guiding the crossbeam 8 during its up and down movement to make the up and down movement of the crossbeam 8 more stable. The output shafts of the left and right first hydraulic telescopic rods 401 in the side pushing mechanism 4 drive the push plate 402 to move, which can push the gangue away, making the support stable when placed and increasing the support area on the lower surface. Moreover, through the second hinge 502 in the first side sealing mechanism 5 and the second side sealing mechanism 10, the mounting frame 501 has a folding and opening function. The second hydraulic telescopic rod 504 between the third hinge 503 and the fourth hinge 505 drives the mounting frame 501 to unfold, and the mounting frame 501 drives the baffle 506 to unfold. The baffle 506 can effectively prevent the gangue from falling and increase the support area, playing a certain role in preventing the support from toppling, having good shielding and protection performance, and being safer to use. The designed width of this chock support is 1.7 m, the minimum retracted height is 2.1 m, and the maximum unfolded height is 3.6 m, enabling this single hydraulic support to meet the support requirements of the retreat roadway in the ordinary mining height working face. In the ultra-large mining height roadway, the upper and lower hydraulic supports are stacked together. The slot 201 in the first connection mechanism 2 on the lower surface of the adjacent upper base 1 is used to insert the fixed pull plate 12. The fixed pin 203 is inserted into the side wall of the base 1 and the jack 202 on the fixed pull plate 12, and then the fixed pin 203 is limited and fixed by the limit pin assembly 204, connecting and fixing the fixed pull plate 12 to the base 1. The fixed pull plate 12 is inserted into the second connection mechanism 11 on the upper surface of the crossbeam 8 of the adjacent lower support, connecting and fixing the crossbeam 8 to the upper stacked base 1. At the same time, the shear-resistant positioning pin shaft 14 is inserted into the first pin hole 3 on the lower surface of the base 1 and the second pin hole 13 on the upper surface of the crossbeam 8, stacking the upper and lower hydraulic supports together. Stacking and using the upper and lower parts can meet the support requirements of the retreat roadway in the ultra-large mining height working face and meet the usage requirements of large initial support force and large working resistance.

[0046] In summary, this ultra-large working resistance stacked chock hydraulic support, when used alone, meets the support requirements of the retreat roadway in the ordinary mining height working face, and when stacked and used up and down, it meets the support requirements of the retreat roadway in the ultra-large mining height working face, meets the usage requirements of large initial support force and large working resistance, and at the same time has good shielding and protection performance, and is safer to use.

[0047] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-large working resistance stacked hydraulic support, including a base (1), characterized in that: The lower side wall of the base (1) is provided with a first connection mechanism (2) in a rectangular shape near the front and rear positions. Two first pin holes (3) are opened in the lower surface of the base (1) near the middle position. A side push mechanism (4) is arranged on the front side wall of the base (1). First side sealing mechanisms (5) are installed on the upper surface of the base (1) near the front and rear edges. Four hydraulic telescopic columns (6) are arranged in the middle position of the lower inner wall of the base (1). The upper surface of the hydraulic telescopic column (6) is connected to the upper inner wall of the top beam (8) through a first hinge (7). A stabilizing mechanism (9) is arranged between the right end of the base (1) and the right end of the top beam (8). Second side sealing mechanisms (10) are arranged on the front and rear side walls of the top beam (8). A second connection mechanism (11) is arranged on the upper surface of the top beam (8). A fixed pull plate (12) is installed in the second connection mechanism (11). Two second pin holes (13) are opened in the upper surface of the top beam (8) near the middle position. A positioning pin shaft (14) is inserted into the second pin hole (13).

2. The super-large working resistance laminated hydraulic support according to claim 1, characterized in that: The first connection mechanism (2) includes a slot (201), a jack (202), a fixing pin (203), and a limit pin assembly (204). A slot (201) for inserting the fixed pull plate (12) is opened on the lower surface of the base (1). Jacks (202) are opened on the side wall of the base (1) corresponding to the slot (201) and on the fixed pull plate (12). A fixing pin (203) is inserted into the jack (202). The fixing pin (203) is limited and fixed to the side wall of the base (1) through the limit pin assembly (204).

3. The super-large working resistance stacked hydraulic support according to claim 1, wherein: The second connection mechanism (11) has the same structure as the first connection mechanism (2).

4. The super-large working resistance laminated hydraulic support according to claim 1, characterized in that: The side push mechanism (4) includes two first hydraulic telescopic rods (401) arranged left and right. The first hydraulic telescopic rods (401) are installed in the base (1). A push plate (402) is fixedly installed on the front side of the output shaft of the first hydraulic telescopic rod (401).

5. The super-large working resistance stacked hydraulic support according to claim 1, characterized in that: The lower surface of the hydraulic telescopic column (6) is in an arc shape, and the position on the lower inner wall of the base (1) corresponding to the lower surface of the hydraulic telescopic column (6) is in an arc groove shape structure.

6. The super-large working resistance laminated hydraulic support according to claim 1, wherein: The first side sealing mechanism (5) includes a mounting frame (501), a second hinge (502), a third hinge (503), a second hydraulic telescopic rod (504), a fourth hinge (505), and a baffle (506). The lower end of the mounting frame (501) is uniformly connected to the upper surface of the base (1) through the second hinge (502). The middle position of the mounting frame (501) is connected to the output shaft of the second hydraulic telescopic rod (504) through the third hinge (503). The lower end of the second hydraulic telescopic rod (504) is connected to the upper surface of the base (1) through the fourth hinge (505). A baffle (506) is fixedly installed on the mounting frame (501).

7. An ultra-large working resistance stacked hydraulic support according to claim 1, characterized in that: The second side sealing mechanism (10) has the same structure as the first side sealing mechanism (5).

8. The super-large working resistance stacked hydraulic support according to claim 1, characterized in that: The stabilizing mechanism (9) includes a connecting rod (901), a fifth hinge (902), a sixth hinge (903), a shield beam (904), and a seventh hinge (905). Four connecting rods (901) are provided. The lower end of the connecting rod (901) is connected to the base (1) through the fifth hinge (902). The upper end of the connecting rod (901) is connected to the lower end of the shield beam (904) through the sixth hinge (903). The upper end of the shield beam (904) is connected to the right end of the roof beam (8) through the seventh hinge (905).

9. The super-large working resistance stacked hydraulic support according to claim 1, wherein: Connecting plates (15) are provided on both the left and right sides of the base (1), and through holes (16) are formed in the connecting plates (15).

Images