Shield type hydraulic support for three-soft coal seam

Abstract

The utility model discloses a three-soft coal seam shield type hydraulic support which comprises a telescopic beam, and a shovel plate is arranged at the front end of the telescopic beam. The side protecting device comprises a first-stage side protecting mechanism and a second-stage side protecting mechanism; the first-stage side protection mechanism comprises a first-stage side protection plate and a side protection overturning jack, the rear end of the first-stage side protection plate is hinged to the telescopic beam, and the side protection overturning jack is hinged to the telescopic beam and the first-stage side protection plate; the second-stage side protection mechanism comprises a second-stage side protection plate and a side protection telescopic jack, the second-stage side protection plate is installed on the first-stage side protection plate through a sliding structure, and the side protection telescopic jack is connected with the first-stage side protection plate and the second-stage side protection plate. When top coal is mined, the face protection device acts to achieve effective supporting, and after the face protection device is in place, the face protection device moves forwards, and the shovel plate shovels off the reserved top coal. Therefore, when top coal is mined by using the side protection device, the side protection device can quickly extend out, so that the aim of timely supporting is fulfilled, and the condition of wall caving of a coal wall is prevented.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery manufacturing technology, and in particular to a hydraulic support for shielding three soft coal seams. Background Technology

[0002] The term "three-soft coal seam" refers to the soft roof strata, soft main coal seam, and soft floor strata encountered during coal mining. Generally, coal seams exhibiting these three characteristics have weak roof and floor strata, with well-developed fractures and complex geological structures. When using existing hydraulic supports for mining soft coal seams, severe roof collapses occur in front of the supports. Due to the lack of timely and effective support, coal wall spalling is prone to occur, posing significant risks. Utility Model Content

[0003] To address the aforementioned shortcomings, the technical problem to be solved by this utility model is to provide a three-soft coal seam shield hydraulic support with a protective device, which can quickly extend the protective wall to achieve timely support and prevent coal wall spalling.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A three-soft coal seam shield-type hydraulic support includes a telescopic beam with a shovel plate at its front end for shoveling down top coal. The support also includes a side protection device comprising a primary side protection mechanism and a secondary side protection mechanism. The primary side protection mechanism includes a primary side protection plate and a side protection tilting jack that rotates the primary side protection plate. The rear end of the primary side protection plate is hinged to the telescopic beam. One end of the side protection tilting jack is hinged to the telescopic beam, and the other end is hinged to the primary side protection plate. The secondary side protection mechanism includes a secondary side protection plate and a side protection telescopic jack that extends and retracts the secondary side protection plate. The secondary side protection plate is mounted on the primary side protection plate via a sliding structure. One end of the side protection telescopic jack is fixed to the primary side protection plate, and the other end is fixed to the secondary side protection plate.

[0006] In a preferred embodiment, the sliding structure includes a slide rail provided on the primary side guard plate and multiple sliding limit rods provided in the slide rail, each of the sliding limit rods being fixedly connected to the secondary side guard plate.

[0007] In a preferred embodiment, the secondary side protection mechanism includes two secondary side protection plates, which are disposed on both sides of the primary side protection plate, and the two secondary side protection plates are connected together by the sliding limit rod.

[0008] The preferred embodiment is that the primary side guard plate is provided with two parallel slides; the secondary side guard mechanism includes two of the side guard telescopic jacks.

[0009] In a preferred embodiment, the shovel plate is disposed at the front end of the telescopic beam via a welded structure, wherein the welded structure is a Y-shaped connecting plate.

[0010] In a preferred embodiment, the support also includes a protective beam, and the side of the protective beam is provided with a protective movable side guard plate.

[0011] In a preferred embodiment, the bracket further includes a rear connecting rod, and a movable side guard plate is provided on the side of the rear connecting rod.

[0012] In a preferred embodiment, the bracket further includes a base, and the front end of the base bridge adopts an inclined large-foot structure.

[0013] The beneficial effects of this utility model after adopting the above technical solution are:

[0014] The three-soft coal seam shield hydraulic support of this utility model includes a telescopic beam with a shovel plate at the front end for shoveling down the top coal. The support also includes a side protection device, which includes a primary side protection mechanism and a secondary side protection mechanism. The primary side protection mechanism includes a primary side protection plate and a side protection tilting jack that drives the primary side protection plate to rotate. The rear end of the primary side protection plate is hinged to the telescopic beam. One end of the side protection tilting jack is hinged to the telescopic beam, and the other end of the side protection tilting jack is hinged to the primary side protection plate. The secondary side protection mechanism includes a secondary side protection plate and a side protection telescopic jack that drives the secondary side protection plate to extend and retract. The secondary side protection plate is mounted on the primary side protection plate through a sliding structure. One end of the side protection telescopic jack is fixed to the primary side protection plate, and the other end of the side protection telescopic jack is fixed to the secondary side protection plate. When a coal mining machine mines coal below the support, leaving a portion of the top coal, this invention allows the primary and secondary support plates to rotate to a suitable angle under the action of the support plate tilting jacks. Then, driven by the support plate telescopic jacks, the secondary support plate extends, and the invention moves forward. The shovel at the front end of the telescopic beam removes the reserved top coal. Therefore, when using this invention for top coal mining, the support device can extend quickly, providing timely and effective support and preventing coal wall spalling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the hydraulic support for shielding three soft coal seams in this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the protective device in this utility model when it is not in operation;

[0017] Figure 3 This is a schematic diagram of the protective device in operation according to this utility model;

[0018] Figure 4This is a structural diagram of the primary side guard plate mechanism at another flipping angle;

[0019] Figure 5 This is a schematic diagram of the protective device in this utility model;

[0020] Figure 6 This is a top view of the secondary side guard plate when it is extended in this utility model;

[0021] Figure 7 This is a top view of the secondary side guard plate in this utility model when it is not extended;

[0022] In the diagram: 1-Telescopic beam, 2-Side protection device, 20-First-level side protection mechanism, 200-First-level side protection plate, 201-Side protection tilting jack, 202-Slide rail, 21-Second-level side protection mechanism, 210-Second-level side protection plate, 211-Side protection telescopic jack, 212-Sliding limit rod, 3-Shovel plate, 4-Welded structure, 5-Base, 50-Base bridge front end, 6-Rear connecting rod, 7-Rear connecting rod movable side protection plate, 8-Shield beam, 9-Shield movable side protection plate, 10-Column. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figures 1 to 4As shown in the figure, a three-soft coal seam shield hydraulic support includes a telescopic beam 1, and a shovel plate 3 is provided at the front end of the telescopic beam 1. The shovel plate 3 is used to scoop down the top coal. The shovel plate 3 can be installed at the front end of the telescopic beam 1 through a welded structure 4. The welded structure 4 is a Y-shaped connecting plate. Under the action of the Y-shaped connecting plate, the structural strength is increased.

[0027] like Figures 1 to 7 As shown in the figure, the three-soft coal seam shield hydraulic support of this utility model also includes a side protection device 2, which includes a primary side protection mechanism 20 and a secondary side protection mechanism 21.

[0028] The primary side protection mechanism 20 includes a primary side protection plate 200 and a side protection tilting jack 201 that drives the primary side protection plate 200 to rotate. The rear end of the primary side protection plate 200 is hinged to the telescopic beam 1. One end of the side protection tilting jack 201 is hinged to the telescopic beam 1, and the other end of the side protection tilting jack 201 is hinged to the primary side protection plate 200.

[0029] The secondary side protection mechanism 21 includes a secondary side protection plate 210 and a side protection telescopic jack 211 that drives the secondary side protection plate 210 to extend and retract. The secondary side protection plate 210 is installed on the primary side protection plate 200 through a sliding structure. One end of the side protection telescopic jack 211 is fixed on the primary side protection plate 200, and the other end of the side protection telescopic jack 211 is fixed on the secondary side protection plate 210.

[0030] In this embodiment, the sliding structure includes a slide rail 202 on the primary side guard plate 200 and multiple sliding limit rods 212 disposed within the slide rail 202. Each sliding limit rod 212 is fixedly connected to the secondary side guard plate 210. Specifically, the secondary side guard mechanism 21 includes two secondary side guard plates 210, which are disposed on both sides of the primary side guard plate 200 and connected together by the sliding limit rods 212. The sliding limit rods 212 can be connecting bolts, with connecting nuts at both ends. Under the action of the connecting bolts and connecting nuts, the two secondary side guard plates 210 are connected together.

[0031] like Figure 6 and Figure 7 As shown, in a preferred embodiment, the primary side guard plate 200 is provided with two parallel slide rails 202. Under the action of the two slide rails 202, the secondary side guard plate 210 can reliably slide on the primary side guard plate 200, thereby improving the reliability of the extension and retraction of the side guard device 2. The secondary side guard mechanism 21 may include two side guard extension jacks 211. Under the action of the two side guard extension jacks 211, the secondary side guard plate 210 can be reliably driven to slide.

[0032] like Figure 1As shown, the three-soft coal seam shield hydraulic support of this utility model also includes a shield beam 8 and a rear connecting rod 6. A shield movable side guard plate 9 is provided on the side of the shield beam 8, and a rear connecting rod movable side guard plate 7 is provided on the side of the rear connecting rod 6. In a preferred embodiment, the shield movable side guard plate 9 and the rear connecting rod movable side guard plate 7 extend and retract simultaneously. Furthermore, the shield movable side guard plate 9 and the rear connecting rod movable side guard plate 7 can be extended and retracted by corresponding jacks.

[0033] like Figure 1 As shown, the three-soft coal seam shield hydraulic support of this utility model also includes a base 5. The front end 50 of the base bridge adopts an inclined large foot structure. At the same time, the length of the front foot pedal is increased, the hinge position of the column 10 is adjusted, the specific pressure at the front end of the base 5 is reduced, the support sinks, and the adaptability of the support base plate is improved.

[0034] like Figures 1 to 7 As shown in the diagram, when using the three-soft coal seam shield hydraulic support of this utility model, the side-support tilting jack 201 can be tilted at a corresponding angle according to the actual support needs, causing the primary side-support plate 200 and the secondary side-support plate 210 to tilt at a corresponding angle. Simultaneously, the side-support telescopic jack 211 actuates, causing the secondary side-support plate 210 to slide along the slide rail 202, extending the primary side-support plate 200, so that the side-support device 2 reaches an effective support position. After the side-support device 2 is in place, the utility model moves forward, and the shovel plate 3 at the front end of the telescopic beam 1 shovels down the remaining top coal. Because this utility model uses under-beam coal cutting, the probability of roof collapse after coal cutting is reduced, and because the side-support device 2 can provide effective and timely support, the problem of coal wall spalling is solved.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or improvements to the same type of three-soft coal seam shield hydraulic support made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-soft coal seam shield type hydraulic support comprising a telescopic beam, characterized in that, The front end of the telescopic beam is provided with a shovel plate for shoveling off top coal. The first side support plate is hingedly connected to the rear end of the telescopic beam, one end of the first side support plate is hingedly connected to the first side support plate, and the other end of the first side support plate is hingedly connected to the second side support plate. The second side support plate is hingedly connected to the rear end of the telescopic beam, one end of the second side support plate is hingedly connected to the first side support plate, and the other end of the second side support plate is hingedly connected to the second side support plate.

2. The three-soft coal seam shield hydraulic support according to claim 1, characterized in that, The telescopic beam is provided with a shovel plate for shoveling off top coal.

3. The three-soft coal seam canopy hydraulic support according to claim 2, characterized in that, The support further comprises a shield beam, and the side surface of the shield beam is provided with a shield movable side plate.

4. The three-soft coal seam canopy hydraulic support according to claim 3, characterized in that, The support further comprises a rear connecting rod, and the side surface of the rear connecting rod is provided with a rear connecting rod movable side plate. The support further comprises a base, and the front end of the bridge of the base adopts an inclined large foot structure.

5. The three-soft coal seam canopy hydraulic support according to claim 1, characterized in that, ​ 6. The three-soft coal seam canopy hydraulic support according to claim 1, characterized in that, ​ 7. The three-soft coal seam canopy hydraulic support according to claim 1, characterized in that, ​ 8. The three-soft coal seam canopy hydraulic support according to claim 1, characterized in that, ​

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