Telescopic beam structure of front coal caving hydraulic support

Abstract

The utility model provides a telescopic beam structure of a front coal caving hydraulic support, which comprises a plate-type telescopic beam lapped at the upper part of a top beam and a box telescopic beam inserted in the top beam, and the front end of the plate-type telescopic beam is hinged with the front end of the box telescopic beam; a telescopic jack is connected between the plate-type telescopic beam and the top beam, and the plate-type telescopic beam and the box body telescopic beam simultaneously extend or retract under the action of the telescopic jack; the front end of the plate type telescopic beam is provided with a connecting lug plate used for being hinged to the side protection plate, and the box body telescopic beam is provided with a side protection jack used for being connected with the side protection plate. The telescopic beam structure is designed into an upper-layer structure and a lower-layer structure, waste rock leakage of the top plate can be prevented, falling waste rock can be prevented from entering the top beam when the telescopic beam structure is retracted, the waste rock is prevented from being clamped in a gap between the telescopic beam structure and the top beam, and reliable functions of the telescopic beam structure are guaranteed; meanwhile, follow-up of the side protection jack and the telescopic beam structure can be achieved, and the function that the side protection plate supports the coal wall at any time is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic support, specifically, relate to a telescopic beam structure of front coal placing hydraulic support. BACKGROUND

[0002] The front coal placing hydraulic support requires that the top beam can be lowered to place coal, and is upturned to support the roof, and simultaneously has telescopic beam and support mechanism, and meets the functions of the telescopic beam extending to support the roof temporarily, and the support mechanism extending with the telescopic beam to support the coal wall and prevent the coal wall from falling. However, due to the size limitation of the support structure, the telescopic beam structure assembled in the top beam in the prior art cannot realize the function of the support jack following the support mechanism, and the support plate cannot support the coal wall at any time.

[0003] Chinese utility model patent CN2014208085408 discloses a hydraulic support top beam following support mechanism, which comprises a support top beam, a telescopic beam arranged at the front end of the support top beam, and a support mechanism hinged to the front end of the telescopic beam through a four-bar linkage mechanism; a support jack and a telescopic beam jack are arranged side by side in the middle part of the telescopic beam, the end of the piston rod of the support jack is hinged to the four-bar linkage mechanism, and the cylinder body thereof is hinged to the middle part of the rear end of the telescopic beam; the end of the piston rod of the telescopic beam jack is hinged to the telescopic beam, and the cylinder body thereof is hinged to the middle part of the front end of the support top beam. The support jack and the telescopic beam jack are arranged in the middle part of the telescopic beam, and the conventional support plate in the conventional support mechanism is omitted, so that the thickness of the front end of the support top beam is appropriately reduced, the gap between the hydraulic support and the matching scraper conveyor is increased, and the adaptability of the hydraulic support to the thin coal seam working face is enhanced. At the same time, the support jack is hinged to the telescopic beam, and the support mechanism and the telescopic beam follow each other. However, the telescopic beam of the hydraulic support top beam following support mechanism is an E-shaped beam body inserted into the top beam, and when the support of the roof is completed and the telescopic beam is retracted, there may be some falling gangue on the telescopic beam, which is retracted into the top beam together with the telescopic beam. Over time, too much gangue accumulates in the gap between the telescopic beam and the top beam, which causes the telescopic beam to be difficult to extend and retract, and the function is lost. SUMMARY

[0004] The utility model aims at the shortage of the prior art, and provides a telescopic beam structure of front coal placing hydraulic support, which is used for solving the problem that some falling gangue may be retracted into the top beam together with the telescopic beam when the telescopic beam is retracted, and over time, the telescopic beam is difficult to extend and retract, and simultaneously can realize the following movement of the support jack and the telescopic beam structure, and meets the function of the support plate supporting the coal wall at any time.

[0005] In order to achieve the above object, the utility model adopts the technical scheme: a telescopic beam structure of front coal discharging hydraulic support, including the plate type telescopic beam of overlapping on the top beam upper portion and the box type telescopic beam of inserting in the top beam inside, the front end of plate type telescopic beam and the front end of box type telescopic beam articulate, plate type telescopic beam and top beam are connected with telescopic jack, and plate type telescopic beam and box type telescopic beam are withdrawn or withdrawn simultaneously under the action of telescopic jack, the front end of plate type telescopic beam is provided with the connecting lug plate for articulating with the protection board, and the protection jack for connecting with the protection board is installed on the box type telescopic beam.

[0006] Based on the above, the front end lower portion of plate type telescopic beam is provided with the bottom plate, the lower portion of bottom plate is provided with the connecting plate perpendicular to bottom plate, a plurality of connecting lug plates are welded between bottom plate and connecting plate and spaced apart on the front side, and the rear side of connecting plate is provided with the hinge support for connecting telescopic jack.

[0007] Based on the above, the front end of box type telescopic beam is provided with lug seat connected with connecting plate through pin shaft.

[0008] Based on the above, the pivot shaft is rotationally arranged on the box type telescopic beam, and one end of the protection jack is hingedly connected to the pivot shaft.

[0009] Based on the above, the circular ring structure is vertically welded in the box type telescopic beam, the pivot shaft is rotationally arranged in the circular ring structure, the inner wall of the circular ring structure is circumferentially provided with a ring groove, the pivot shaft is radially provided with a positioning pin matched and clamped in the ring groove, and the inner wall of the circular ring structure is further provided with two radially symmetrical mounting grooves, the upper end of the mounting groove is connected with the ring groove, the lower end of the mounting groove is arranged at the lower end of the circular ring structure, and the positioning pin can be assembled into the ring groove through the two mounting grooves.

[0010] The utility model has substantial features and progress relative to the prior art, and specifically, the telescopic beam structure of the utility model is designed as a two-layer structure: the upper layer is the plate type telescopic beam overlapping on the top beam upper portion, which can temporarily support the top plate when extended, prevent the top plate from leaking gangue, avoid some falling gangue from entering the top beam when retracted, prevent the gangue from being stuck in the gap between the telescopic beam structure and the top beam, and ensure the reliable function of the telescopic beam structure; and the lower layer is the box type telescopic beam inserted in the top beam, which plays a guiding and bearing role. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the structure schematic view of the utility model assembled on the top beam.

[0012] Figure 2 It is the structure schematic view of the utility model.

[0013] Figure 3It is the structure schematic view of the split of the plate type telescopic beam and the box type telescopic beam.

[0014] Figure 4 It is Figure 2 The local enlarged view at B in the middle.

[0015] Figure 5 It is the sectional view of the connecting structure of the protecting beam jack and the box type telescopic beam of the utility model.

[0016] In the drawing: 1. top beam; 2. plate type telescopic beam; 3. box type telescopic beam; 4. telescopic jack; 5. connecting lug plate; 6. protecting beam jack; 7. bottom plate; 8. connecting plate; 9. hinge support; 10. lug seat; 11. rotating shaft; 12. circular ring structure; 13. ring groove; 14. positioning pin; 15. mounting groove. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model will be described in further detail below through specific embodiments.

[0018] Embodiment 1

[0019] As Figure 1 and Figure 2 shown, a telescopic beam structure of a front coal discharging hydraulic support includes a plate type telescopic beam 2 lapped on the upper part of a top beam 1 and a box type telescopic beam 3 inserted in the inside of the top beam 1, and the front end of the plate type telescopic beam 2 is hingedly connected with the front end of the box type telescopic beam 3; a telescopic jack 4 is connected between the plate type telescopic beam 2 and the top beam 1, and the plate type telescopic beam 2 and the box type telescopic beam 3 are simultaneously extended or retracted under the action of the telescopic jack 4; the front end of the plate type telescopic beam 2 is provided with a connecting lug plate 5 for hingedly connecting with a protecting beam plate, and the box type telescopic beam 3 is provided with a protecting beam jack 6 for connecting with the protecting beam plate.

[0020] Specifically, as Figure 1 , Figure 2 and Figure 3 shown, the front end lower part of the plate type telescopic beam 2 of the embodiment is provided with a bottom plate 7, the lower part of the bottom plate 7 is provided with a connecting plate 8 perpendicular to the bottom plate 7, and a plurality of connecting lug plates 5 are spaced apart and welded on the front side between the bottom plate 7 and the connecting plate 8, and the rear side of the connecting plate 8 is provided with a hinge support 9 for connecting the telescopic jack 4.

[0021] The front end of the box type telescopic beam 3 is provided with a lug seat 10 connected with the connecting plate 8 through a pin shaft.

[0022] The working principle of the embodiment is that the telescopic jack 4 can push the plate telescopic beam 2 and the box telescopic beam 3 to synchronously extend or retract, so that the plate telescopic beam 2 timely supports the roof to prevent the roof from leaking gangue, and the box telescopic beam 3 guides and bears, at the same time, the box telescopic beam 3 can drive the support jacks 6 to move together, so that the support jacks 6 and the telescopic beam structure follow the movement, and the support plate timely supports the coal wall. Since the plate telescopic beam 2 is overlapped on the upper portion of the roof beam 1, even if some gangue falls, the gangue can only fall on the plate telescopic beam 2, and the plate telescopic beam 2 is retracted to avoid the gangue entering the roof beam 1, prevent the gangue from being stuck in the gap between the telescopic beam structure and the roof beam 1, and ensure that the telescopic beam structure is reliable in function.

[0023] Embodiment 2

[0024] On the basis of the embodiment 1, as shown in Figure 4 and Figure 5 , the embodiment provides an assembly mode of the support jack 6 and the box telescopic beam 3 in the embodiment 1, which is convenient to disassemble and assemble and reliable in structure function after installation:

[0025] The box telescopic beam 3 is rotationally provided with a rotating shaft 11, and one end of the support jack 6 is hingedly connected with the rotating shaft 11.

[0026] The box telescopic beam 3 is vertically penetrated and welded with a circular ring structure 12, the rotating shaft 11 is rotationally arranged in the circular ring structure 12, the inner wall of the circular ring structure 12 is circumferentially provided with a ring groove 13, the rotating shaft 11 is radially penetrated and provided with a positioning pin 14 matched and clamped in the ring groove 13, and the inner wall of the circular ring structure 12 is further provided with two radially symmetrical installation grooves 15, the upper end of the installation groove 15 is connected with the ring groove 13, the lower end of the installation groove 15 is arranged at the lower end of the circular ring structure 12, and the positioning pin 14 can be assembled into the ring groove 13 through the two installation grooves 15.

[0027] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific implementation mode of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical scheme of the utility model, all of them should be covered in the technical scheme range of the utility model claimed in the utility model.

Claims

1. A telescopic beam structure of a front coal caving hydraulic support, characterized by: It includes a plate-type telescopic beam overlapped on the upper part of the top beam and a box-type telescopic beam inserted into the inside of the top beam. The front end of the plate-type telescopic beam is hinged to the front end of the box-type telescopic beam; a telescopic jack is connected between the plate-type telescopic beam and the top beam, and the plate-type telescopic beam and the box-type telescopic beam are extended or retracted at the same time under the action of the telescopic jack; the front end of the plate-type telescopic beam is provided with a connecting ear plate for being hinged to the guard plate, and the box-type telescopic beam is installed with a guard jack for being connected to the guard plate.

2. The telescopic beam structure of the front coal caving hydraulic support according to claim 1 is characterized in that: A base plate is provided at the lower part of the front end of the plate-type telescopic beam, and a connecting plate perpendicular to the base plate is provided at the lower part of the base plate. Several connecting ear plates are welded at intervals on the left and right sides of the front side between the base plate and the connecting plate, and a hinge support for connecting the telescopic jack is provided on the rear side of the connecting plate.

3. The telescopic beam structure of the front coal caving hydraulic support according to claim 2 is characterized in that: The front end of the box telescopic beam is provided with an ear seat connected to the connecting plate through a pin shaft.

4. The telescopic beam structure of the front coal caving hydraulic support according to any one of claims 1 to 3, characterized in that: A rotating shaft is rotatably arranged on the telescopic beam of the box body, and one end of the guard jack is hinged to the rotating shaft.

5. The telescopic beam structure of the front coal caving hydraulic support according to claim 4, characterized in that: A circular ring structure is welded vertically through the telescopic beam of the box body, and the rotating shaft is rotatably set in the circular ring structure. The inner wall of the circular ring structure is provided with a ring groove along the circumferential direction, and a positioning pin is provided radially through the upper side of the rotating shaft and is matched and engaged in the ring groove. The inner wall of the circular ring structure is also provided with two radially symmetrical mounting grooves vertically, the upper end of the mounting groove is connected to the ring groove, and the lower end of the mounting groove is set at the lower end of the circular ring structure. The positioning pin can be assembled into the ring groove through the two mounting grooves.

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