Rhombic oscillating bar type forepoling

Abstract

The utility model relates to the technical field of coal mining supporting, in particular to a rhombic swing rod type forepoling which comprises a base, a telescopic stand column, a supporting beam, a rhombic swing rod mechanism and a top beam. The rhombic swing rod mechanism is arranged between the supporting beam and the top beam in a foldable mode. The supporting beam and the base are connected through the telescopic stand column, and the telescopic stand column can drive the supporting beam to move up and down in the axial direction of the stand column so as to meet the supporting requirements of roadways of different heights. The large telescoping ratio of the forepoling in the vertical direction is achieved through vertical telescoping of the telescopic stand column and combination of folding and unfolding of the rhombic swing rod mechanism, and then the requirement for roadway supporting with the large height range change is met. And meanwhile, the overall structure is simple and reliable, rapid deployment in place can be achieved, the construction time and cost are reduced, the overall supporting efficiency is improved, and the positive effect on the actual production process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mining support especially relates to a rhombic swing lever type advanced support. BACKGROUND

[0002] The hydraulic support of the fully mechanized coal mining face is divided into basic support, transition support, end support and advanced support according to the position in working. The advanced support is arranged in the roadway at the outlet of the working face, supports the roadway roof and provides safety guarantee for the following operating personnel, transshipment machine, crusher and other equipment. The advanced support currently has two-column type, unit type, sliding type and integral type.

[0003] The most widely used is two-column type. In the structure of the two-column type advanced support, two columns of supports are symmetrically arranged at the two sides of the roadway, and the support is composed of a base, a column, a top beam, a cantilever jack, an outer cantilever, an inner cantilever and an inclined beam. The base directly contacts with the roadway floor to transmit the support force of the support to the floor. The column is connected between the top beam and the base to provide support force for the support, and the top beam directly contacts with the roadway roof to transmit the support force. The cantilever jack is connected between the top beam and the cantilever to provide power for the extension or retraction of the cantilever; the outer cantilever and the inner cantilever are hinged at the two sides of the top beam to provide support space for pedestrians or transshipment machines and other equipment. Such two-column type support has the following problems in use: 1. The base of the two-column type support is very narrow in the width direction of the roadway, and the contact area with the ground is small, which is easy to tilt left and right and has poor stability. 2. The transportation height is large, and the transportation is not convenient. 3. The support has small extension ratio, and the height range of the roadway that can be adapted is small. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem to be solved

[0005] The utility model provides a rhombic swing lever type advanced support, aims at solving the problem that the advanced support cannot adapt to the height range of the roadway with large change caused by small extension ratio in the supporting process and the problem of poor universality.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the utility model provides a rhombic swing lever type advanced support, which comprises a base, an extension column, a support beam, a rhombic swing lever mechanism and a top beam. The rhombic swing lever mechanism is foldably arranged between the support beam and the top beam. The support beam and the base are connected through the extension column, and the extension column can drive the support beam to move up and down along the axial direction of the column to adapt to the support requirements of the roadway with different heights.

[0008] Further, the rhombus swing rod mechanism comprises: a connecting rod mechanism, a top end of which is rotationally connected with the top beam, and a bottom end of which is rotationally connected with the support beam; and a linear drive arranged on the connecting rod mechanism, used for driving the connecting rod mechanism to fold or unfold between the support beam and the top beam, so as to drive the top beam to move up and down.

[0009] Further, the linear drive is selected from any one of a hydraulic linear drive and an electric linear drive.

[0010] Further, the connecting rod mechanism comprises: a first connecting rod, a top end of which is hingedly connected with a first hinge point below the top beam; a second connecting rod, a top end of which is hingedly connected with a second hinge point below the top beam, and which is adjacent to the first connecting rod; a third connecting rod, a bottom end of which is hingedly connected with a third hinge point above the support beam; and a fourth connecting rod, a bottom end of which is hingedly connected with a fourth hinge point above the support beam, and which is adjacent to the third connecting rod; wherein a bottom end of the second connecting rod and a top end of the third connecting rod are hingedly connected with a fifth hinge point, and a bottom end of the first connecting rod and a top end of the fourth connecting rod are hingedly connected with a sixth hinge point, forming a foldable rhombus structure.

[0011] The linear drive comprises: a first oil cylinder, a bottom end of which is hingedly connected with the third connecting rod through a seventh hinge point; and a push rod, arranged at an output end of the first oil cylinder, a top end of which is hingedly connected with the first connecting rod through an eighth hinge point.

[0012] Further, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod all have the same length, and all have multiple different length specifications, used for adjusting the overall height and support range of the forepoling support.

[0013] Further, both ends of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are provided with angular support portions, and hinge holes are arranged on the angular support portions.

[0014] Further, the telescopic stand comprises: an outer cylinder and an inner cylinder which are sleeved with each other and can slide relative to each other; and a second oil cylinder, fixedly connected with the outer cylinder and capable of driving the inner cylinder to move along an axial direction of the outer cylinder; and a pressure regulating valve is further arranged on the outer cylinder, used for regulating a pushing force applied by the second oil cylinder to the inner cylinder.

[0015] Further, both sides of the base are provided with accessory connecting holes, and the base can be fixed on a roadway floor through connecting members.

[0016] (Three) beneficial effects

[0017] The utility model discloses a beneficial effect is: through the up and down telescopic of telescopic stand and the folding of rhombus swing bar mechanism's unfolding realize the telescopic ratio of advance support in vertical direction's big, and further adapt to the roadway support demand of the change of height range. The foldable function of rhombus swing bar mechanism makes the whole structure more compact and flexible. Not only convenient for the transportation, installation and dismounting of support, can also effectively support under different roadway height and geological conditions. At the same time, it ensures that the support can adapt to various complex environments, improves the application range and flexibility of support. In addition, the telescopic stand makes the support beam can move up and down along the axial direction of the stand, thereby accurately adjusting the height of the support. Ensure the close fit and stability of the support structure, effectively prevent the deformation and collapse of roadway surrounding rock, improve the safety and reliability of support. The overall structure of support is simple and reliable, can be quickly deployed in place, reduces construction time and cost. At the same time, the stability and safety of support also ensure the safety of personnel and equipment during construction, further improve the overall support efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of rhombus swing bar type advance support.

[0019] Figure 2 It is another state schematic diagram of Figure 1 .

[0020] Figure 3 It is the schematic diagram of rhombus swing bar mechanism folding in the embodiment shown in Figure 1 .

[0021]

BRIEF DESCRIPTION OF DRAWINGS

[0022] 1: base; 11: accessory connecting hole; 2: telescopic stand; 21: outer cylinder; 22: inner cylinder; 3: support beam; 4: rhombus swing bar mechanism; 41: connecting rod mechanism; 411: first connecting rod; 412: second connecting rod; 413: third connecting rod; 414: fourth connecting rod; 42: first oil cylinder; 43: push rod; 5: top beam. DETAILED DESCRIPTION

[0023] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings, through specific embodiment, the utility model is described in detail.

[0024] The embodiment provides a rhombus swing bar type advance support, as shown in Figure 1 And Figure 2 , the advance support includes base 1, telescopic stand 2, support beam 3, rhombus swing bar mechanism 4 and top beam 5. Among them, rhombus swing bar mechanism 4 is foldably arranged between support beam 3 and top beam 5. Support beam 3 and base 1 are connected through telescopic stand 2, and telescopic stand 2 can drive support beam 3 to move up and down along the axial direction of the stand to adapt to the support demand of different height roadway.

[0025] The base 1 is made of structural steel, mainly providing balanced support and load bearing for the entire advance support. The telescopic column 2 is fixed to the center of the base 1 by fastening bolts, further enhancing stability. The top end of the telescopic column 2 is fixedly connected to the support beam 3 by fastening bolts. The support beam 3 is used to provide support for the diamond swing lever mechanism 4 and the top beam 5, and the top beam 5 is the main support structure, which is in close contact with the roof of the roadway. The above technical scheme realizes large telescopic ratio support of the advance support in the vertical direction through the up-down telescopic movement of the telescopic column 2 combined with the folding and unfolding of the diamond swing lever mechanism 4, thereby adapting to the support requirements of the roadway with large range of height changes. The foldable function of the diamond swing lever mechanism 4 makes the overall structure more compact and flexible. Not only is it convenient for transportation, installation and disassembly of the support, but also can effectively support under different roadway heights and geological conditions. At the same time, it ensures that the support can adapt to various complex environments, improves the application range and flexibility of the support. In addition, the telescopic column makes the support beam 3 move up and down along the axis of the column, thereby accurately adjusting the height of the support. It ensures the close fit and stability of the support structure, effectively prevents the deformation and collapse of the surrounding rock of the roadway, and improves the safety and reliability of the support. The overall structure of the support is simple and reliable, which can be quickly deployed in place, reducing construction time and cost. At the same time, the stability and safety of the support also ensure the safety of personnel and equipment during construction, further improving the overall support efficiency.

[0026] In this embodiment, the diamond swing lever mechanism 4 includes a linkage mechanism 41, the top end of which is rotationally connected to the top beam 5, and the bottom end of which is rotationally connected to the support beam 3; a linear actuator is arranged on the linkage mechanism 41 and is used to drive the linkage mechanism 41 to fold or unfold between the support beam 3 and the top beam 5, so as to drive the top beam 5 to move up and down reciprocally.

[0027] The diamond swing lever mechanism 4 here is specifically a telescopic linkage mechanism 41, which is composed of four linkage rods hinged to each other. The linear actuator is hinged to the linkage mechanism 41, and through the linear reciprocating movement of the linear actuator, the linkage mechanism 41 is driven to fold or unfold between the support beam 3 and the top beam 5. When the linear actuator works, it pushes or pulls the linkage mechanism 41, thereby driving the top beam 5 to move up and down reciprocally. Through the ingenious combination of the linkage mechanism 41 and the linear actuator, the support realizes flexible and accurate control of the height of the top beam 5, providing strong support for roadway support.

[0028] The linear actuator is selected from any one of a hydraulic linear actuator and an electric linear actuator. Specifically, in this embodiment, a hydraulic linear actuator is selected.

[0029] Reference Figure 3As shown, in the embodiment, the linkage mechanism 41 comprises: a first linkage 411, the top end of which is hingedly connected to a first hinge point below the top beam 5; a second linkage 412, the top end of which is hingedly connected to a second hinge point below the top beam 5, and adjacent to the first linkage 411; a third linkage 413, the bottom end of which is hingedly connected to a third hinge point above the support beam 3; and a fourth linkage 414, the bottom end of which is hingedly connected to a fourth hinge point above the support beam 3, and adjacent to the third linkage 413. The bottom end of the second linkage 412 and the top end of the third linkage 413 are hingedly connected to a fifth hinge point, and the bottom end of the first linkage 411 and the top end of the fourth linkage 414 are hingedly connected to a sixth hinge point, forming a foldable rhombus structure. The linear drive comprises: a first oil cylinder 42, the bottom end of which is hingedly connected to the third linkage 413 through a seventh hinge point; and a push rod 43, provided at the output end of the first oil cylinder 42, the top end of which is hingedly connected to the first linkage 411 through an eighth hinge point.

[0030] It should be noted that, in the embodiment, the first linkage 411, the second linkage 412, the third linkage 413 and the fourth linkage 414 all have the same length, and there are multiple specifications with different lengths, which are used to adjust the overall height and support range of the forepoling support. When transporting, the linear drive can be disassembled, and the linkage mechanism can be folded to reduce the transportation height, as shown in FIG. 2. Figure 3 If the roadway needs a higher support, only four linkages need to be replaced with longer linkages, and the height of the support can be increased, thereby reducing the cost of replacing the support and the time cost of manufacturing the support.

[0031] In the embodiment, both ends of the first linkage 411, the second linkage 412, the third linkage 413 and the fourth linkage 414 have angular support portions, and hinge holes are arranged on the angular support portions. Specifically, the center of the hinge hole is arranged at the center of the angular support portion, and deviates from the axis of the linkage. When the linkage mechanism 41 is unfolded, the end portions of the first linkage 411 and the second linkage 412 close to the top beam 5 are supported between the first hinge point and the second hinge point; and the end portions of the third linkage 413 and the fourth linkage 414 close to the support beam 3 are supported between the third hinge point and the fourth hinge point. When the linkage mechanism 41 is folded, the second linkage 412 and the third linkage 413 rotate to fit around the fifth hinge point, and the first linkage 411 and the fourth linkage 414 rotate to fit around the sixth hinge point.

[0032] Referring to Figure 2As shown, in this embodiment, the telescopic column 2 comprises an outer cylinder 21, an inner cylinder 22 and a second oil cylinder, which are mutually sleeved and can slide relative to each other. The second oil cylinder is fixedly connected with the outer cylinder 21 and can drive the inner cylinder 22 to move along the axial direction of the outer cylinder 21. The outer cylinder 21 is also provided with a pressure regulating valve for adjusting the pushing force of the second oil cylinder on the inner cylinder 22. It should be noted that the cylinder diameter of the telescopic column is higher than that of the ordinary roadway support, so as to enhance the supporting force. In this embodiment, the base 1 is provided with accessory connecting holes 11 on both sides and can be fixed on the roadway floor through connecting pieces. The base 1 directly contacts with the roadway floor to transmit the supporting force of the support to the floor, and the reserved connecting holes on both sides are used for connecting other accessories.

[0033] In summary, the specific use process of the rhombic swing lever type forepoling support in this embodiment is as follows:

[0034] Firstly, the floor is pre-laid on the roadway ground, and the connecting rod with appropriate length is assembled to assemble the rhombic swing lever mechanism 4;

[0035] Secondly, the assembled rhombic swing lever mechanism 4 is used to assemble the forepoling support, and the forepoling support is placed below the roadway roof to be supported, and the base 1 and the floor are fixedly connected through bolts;

[0036] Then, the rhombic swing lever mechanism 4 is controlled to be in the unfolded state through the first oil cylinder 42, and finally the telescopic column 2 is controlled to be stretched upward through the adjusting valve until the roof beam 5 is in close contact with the roadway roof and provides a certain supporting force.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative position relationship, motion condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0038] In addition, the description such as "first", "second" and the like in this embodiment is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In this embodiment, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this embodiment can be understood according to the specific circumstances.

[0040] It should be understood that the above description of specific embodiments of the utility model is only for the purpose of illustrating the technical route and characteristics of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and to implement it, but the utility model is not limited to the above specific implementation. Any changes or modifications made within the scope of the claims of the utility model should be covered within the protection scope of the utility model.

Claims

1. A diamond pendulum advance support, characterized by, The advanced support comprises a base (1), a telescopic column (2), a support beam (3), a rhombus swing lever mechanism (4) and a top beam (5); The rhombus swing lever mechanism (4) is foldably arranged between the support beam (3) and the top beam (5); The support beam (3) and the base (1) are connected through the telescopic column (2), and the telescopic column (2) can drive the support beam (3) to move up and down along the axial direction of the column to adapt to the support requirements of different height roadways.

2. The diamond pendulum advance support of claim 1, wherein, The rhombus swing lever mechanism (4) comprises: a connecting rod mechanism (41) which is rotationally connected with the top beam (5) at the top end and rotationally connected with the support beam (3) at the bottom end; a linear drive arranged on the connecting rod mechanism (41) and used for driving the connecting rod mechanism (41) to fold or unfold between the support beam (3) and the top beam (5) to drive the top beam (5) to reciprocatingly move up and down.

3. The diamond pendulum lead support of claim 2, wherein, The linear drive is selected from any one of a hydraulic linear drive and an electric linear drive.

4. The diamond pendulum advance support of claim 3, wherein, The connecting rod mechanism (41) comprises: a first connecting rod (411) which is hingedly connected with a first hinge point below the top beam (5) at the top end; a second connecting rod (412) which is hingedly connected with a second hinge point below the top beam (5) at the top end and adjacent to the first connecting rod (411); a third connecting rod (413) which is hingedly connected with a third hinge point above the support beam (3) at the bottom end; a fourth connecting rod (414) which is hingedly connected with a fourth hinge point above the support beam (3) at the bottom end and adjacent to the third connecting rod (413); wherein the bottom end of the second connecting rod (412) and the top end of the third connecting rod (413) are hingedly connected with a fifth hinge point, and the bottom end of the first connecting rod (411) and the top end of the fourth connecting rod (414) are hingedly connected with a sixth hinge point, forming a foldable rhombus structure; The linear drive comprises: a first oil cylinder (42) which is hingedly connected with the third connecting rod (413) at the bottom through a seventh hinge point; a push rod (43) which is arranged at the output end of the first oil cylinder (42) and is hingedly connected with the first connecting rod (411) at the top end through an eighth hinge point.

5. The diamond pendulum advance support of claim 4, wherein, The first connecting rod (411), the second connecting rod (412), the third connecting rod (413) and the fourth connecting rod (414) all have the same length and multiple different length specifications for adjusting the overall height of the advanced support.

6. The diamond pendulum advance support of claim 4, wherein, Both ends of the first connecting rod (411), the second connecting rod (412), the third connecting rod (413) and the fourth connecting rod (414) are provided with angular support portions, and hinge holes are arranged on the angular support portions.

7. A diamond pendulum advance support according to any one of claims 1 to 6, wherein The telescopic column (2) comprises: an outer cylinder (21) and an inner cylinder (22) which are sleeved with each other and can slide relative to each other; a second oil cylinder which is fixedly connected with the outer cylinder (21) and can drive the inner cylinder (22) to move along the axial direction of the outer cylinder (21); The outer cylinder (21) is further provided with a pressure regulating valve for regulating the pushing force of the second oil cylinder on the inner cylinder (22).

8. A diamond pendulum advance support according to claim 7, characterised in that, The base (1) is provided with accessory connecting holes (11) on both sides and can be fixed on the roadway floor through connecting members.

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