End hydraulic support for roadway

Abstract

The utility model provides an end hydraulic support for a roadway. The end hydraulic support comprises a top beam base, a top beam jack and a top beam, and the front end of the top beam is movably connected with a front beam assembly. The front beam assembly comprises a front beam, a telescopic oil cylinder is connected between the rear end of the front beam and the front end of the top beam, a front beam column nest assembly is arranged on the lower side of the front beam, a front beam jack is connected to the front beam column nest assembly, a column shoe is arranged at the bottom of the front beam jack, and a front beam jack ball head is arranged at the top of the front beam jack. A first pin shaft is arranged on the front beam jack ball head; the front beam column nest assembly comprises a column nest base body, a column nest groove is formed in the bottom of the column nest base body, pin shaft mounting plates are arranged at the bottom of the column nest base body and located beside the column nest groove, and a second pin shaft used for supporting the first pin shaft is arranged between the pin shaft mounting plates. The end hydraulic support for the roadway can improve the roof contact effect of the support, reduce repeated supporting of a roof and reduce the labor intensity of workers.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic supports for mining, in particular to an end hydraulic support for tunnels. Background Art

[0002] During the selection and matching process of hydraulic supports, the equipment user requires that the area of the equipment top plate directly connected to the top be increased, and the strength of the top plate support be reduced to reduce the damage to the existing tunnel roof. However, due to the limitations of the size of the coal mining working face or the maximum weight of transportation, the integral top beam cannot be lowered into the well. The equipment selection and matching is in the form of a top beam combined with a hinged front beam. The front beam is connected to the top beam through a hinged shaft and a front beam jack, and the two work together to support the top plate. When the top plate anchor bolt and cable fixing support effect is not good, or the local fixed support fails, and the top plate is relatively broken, the front beam cannot be tilted due to interference between the front beam and the front beam jack. The support force provided by the hinged front beam jack alone is insufficient. Therefore, manual transportation of wooden pillars or retractable hydraulic pillars is often required for temporary support. Frequent transportation of support causes damage to the top plate, and the damage to the top plate further aggravates the phenomenon of insufficient support force of the front beam.

[0003] The utility model patent with authorization announcement number CN218624287U discloses a center-mounted end bracket suitable for U-shaped shed tunnels, including a left upper end bracket and a right lower end bracket. A gap is set between the left upper end bracket and the right lower end bracket. A center-mounted transfer conveyor is installed between the left upper end bracket and the right lower end bracket. The left upper end bracket includes a top support module for supporting the top weight, a side support module for protecting the sides, and a push module and a load-bearing base for movement. Two corresponding columns are installed between the top support module and the corresponding base. This center-mounted end bracket suitable for U-shaped shed tunnels has good overall anti-falling properties and strong adaptability, but the device cannot solve the defect of insufficient front beam support. Utility Model Content

[0004] In order to improve the support roof connection effect, reduce the repeated support of the roof plate, and reduce the labor intensity of workers, the technical solution adopted by the utility model is: a tunnel end hydraulic support, comprising a top beam base, a top beam jack arranged on the top beam base, and a top beam arranged on the top of the top beam jack, wherein the front end of the top beam is movably connected to the front beam assembly;

[0005] The front beam assembly includes a front beam hinged to one end of the top beam, a telescopic oil cylinder is connected between the rear end of the front beam and the front end of the top beam, a front beam column socket assembly is provided on the lower side of the front beam, a front beam jack is connected to the front beam column socket assembly, a column shoe is provided at the bottom of the front beam jack, a front beam jack ball head is provided at the top of the front beam jack, and a first pin is provided on the front beam jack ball head;

[0006] The front beam column socket assembly includes a column socket base, a column socket groove for rotatably cooperating with the ball head of the front beam jack is opened at the bottom of the column socket base, a pin shaft mounting plate is provided at the bottom of the column socket base, the pin shaft mounting plate is located next to the column socket groove, and a second pin shaft for supporting the first pin shaft is provided between the pin shaft mounting plates.

[0007] Based on the above, in order to prevent the front beam jack from interfering with the lower surface of the front beam during contraction and extension, the connection between the lower side of the front beam and the column socket base is bent upward to form an avoidance groove for accommodating the upper end of the front beam jack.

[0008] Based on the above, in order to limit the top degree of freedom of the front beam jack so that it can only rotate left and right in the column socket groove, the first pin shaft and the second pin shaft are arranged perpendicularly.

[0009] Based on the above, in order to avoid interference between the telescopic cylinder and the front end of the top beam when the front beam is tilted, a slope is provided on the lower side of the end where the top beam is connected to the front beam to avoid the telescopic cylinder.

[0010] Based on the above, the length of the top beam is greater than the length of the front beam.

[0011] Based on the above, the column shoe is hinged to the bottom of the front beam jack, and the column shoe, the front beam jack and the front beam move with the top beam base.

[0012] Based on the above, in order to ensure that the front beam can be tilted at one end so that the height of the front beam is higher than that of the top beam, the telescopic range of the front beam jack is greater than that of the top beam jack.

[0013] The present invention has substantial features and progress over the prior art. Specifically, the tunnel end hydraulic support provided by the present invention hinges the front beam at the front end of the top beam, and provides a front beam column socket assembly on the lower side of the front beam for use in conjunction with the jack ball head of the front beam jack, and provides an avoidance groove at the bottom of the front beam to avoid interference with the swing of the front beam jack. The front beam jack can be used to greatly lift the front beam, so that the front beam is close to the tunnel roof, making it more adaptable to the uneven pressure of the roof and the environmental conditions where the roof is relatively broken, thereby ensuring the top connection effect of the tunnel end hydraulic support.

[0014] Furthermore, by setting a column shoe at the bottom of the front beam jack that can move with the top beam support assembly, the supporting stability of the front beam jack is improved, so that the front beam, top beam column shoe and front beam jack form a whole, which can reduce the use of wooden pillars or hydraulic pillars for disassembly, and improve labor productivity and underground mine production safety.

[0015] Furthermore, by connecting a telescopic cylinder at the hinged joint between the front beam and the top beam, and setting the lower side of the front end of the top beam into a slope that can avoid the telescopic cylinder, the front beam can swing up and down normally, making it unnecessary to dismantle the cover beam and cover beam columns to achieve coal placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 This is a schematic structural diagram of the tunnel end hydraulic support provided by the utility model in a working state.

[0017] Figure 3 and Figure 4 It is a structural schematic diagram of the tunnel end hydraulic support provided by the utility model in a swinging state.

[0018] Figure 5 It is a schematic diagram of the partial structure of the end hydraulic support for tunnels provided by the utility model.

[0019] In the figure: 1. Column shoe; 2. Front beam jack; 3. Front beam; 4. Telescopic cylinder; 5. Top beam; 6. Top beam jack; 7. Top beam base; 8. Front beam column socket assembly; 9. Avoidance groove; 10. Slope; 11. Front beam jack ball head; 12. Second pin shaft; 13. First pin shaft; 14. Pin shaft mounting plate; 15. Column socket base; 16. Column socket groove. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0021] Example 1

[0022] This embodiment provides a tunnel end hydraulic support, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a top beam base 7, a top beam jack 6 arranged on the top beam base 7, and a top beam 5 arranged on the top of the top beam jack 6, and the front end of the top beam 5 is movably connected to the front beam assembly.

[0023] The front beam assembly includes a front beam 3 hingedly connected to one end of the top beam 5. A telescopic cylinder 4 is connected between the rear end of the front beam 3 and the front end of the top beam 5. A front beam column socket assembly 8 is provided on the underside of the front beam 3. A front beam jack 2 is connected to the column socket assembly 8, and a column shoe 1 is provided at the bottom of the front beam jack 2. A front beam jack ball head 11 is provided on the top of the front beam jack 2, and a first pin 13 is provided on the front beam jack ball head 11.

[0024] like Figure 5As shown, the front beam column socket assembly 8 includes a column socket base 15. A column socket groove 16 is defined at the bottom of the column socket base 15 and is rotatably engaged with the front beam jack ball head 11. A pin mounting plate 14 is disposed at the bottom of the column socket base 15. The pin mounting plate 14 is positioned adjacent to the column socket groove 16. A second pin 12 for supporting the first pin 13 is disposed between the pin mounting plates 14.

[0025] In this embodiment, the column shoe 1 is hinged to the bottom of the front beam jack 2 , and the column shoe 1 , the front beam jack 2 and the front beam 3 move with the top beam base 7 .

[0026] Example 2

[0027] This embodiment provides an end hydraulic support for a tunnel. The main difference from Embodiment 1 is that in this embodiment: in order to prevent the front beam jack from interfering with the lower surface of the front beam during contraction and extension, the lower side of the front beam 3 is bent upward at the connection with the column socket base 15 to form an avoidance groove 9 for accommodating the upper end of the front beam jack 2.

[0028] In order to prevent the telescopic cylinder from interfering with the front end of the top beam when the front beam tilts up, a slope 10 is provided on the lower side of the end where the top beam is connected to the front beam to avoid the telescopic cylinder.

[0029] Example 3

[0030] This embodiment provides an end hydraulic support for a tunnel. The main difference from Example 1 is that in this embodiment: in order to ensure that the front beam can be tilted at one end and the height of the front beam 3 is higher than the height of the top beam 5, the telescopic range value of the front beam jack 2 is greater than the telescopic range value of the top beam jack 6.

[0031] Example 4

[0032] This embodiment provides a tunnel end hydraulic support. The main difference from Example 1 is that in this embodiment, the top beam is longer than the front beam. To limit the top freedom of the front beam jack to only left and right rotation within the column socket, the first and second pins are arranged perpendicularly.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods 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 solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A tunnel end hydraulic support, characterized by: It includes a top beam base, a top beam jack arranged on the top beam base, and a top beam arranged on the top of the top beam jack, wherein the front end of the top beam is movably connected to a front beam assembly; The front beam assembly includes a front beam hinged to one end of the top beam, a telescopic oil cylinder is connected between the rear end of the front beam and the front end of the top beam, a front beam column socket assembly is provided on the lower side of the front beam, a front beam jack is connected to the front beam column socket assembly, a column shoe is provided at the bottom of the front beam jack, a front beam jack ball head is provided at the top of the front beam jack, and a first pin is provided on the front beam jack ball head; The front beam column socket assembly includes a column socket base, a column socket groove for rotatably cooperating with the ball head of the front beam jack is opened at the bottom of the column socket base, a pin shaft mounting plate is provided at the bottom of the column socket base, the pin shaft mounting plate is located next to the column socket groove, and a second pin shaft for supporting the first pin shaft is provided between the pin shaft mounting plates.

2. The tunnel end hydraulic support according to claim 1, characterized in that: The connection between the lower side of the front beam and the column socket base is bent upward to form an avoidance groove for accommodating the upper end of the front beam jack.

3. The tunnel end hydraulic support according to claim 2, characterized in that: The first pin shaft and the second pin shaft are arranged perpendicularly.

4. The tunnel end hydraulic support according to claim 1, 2 or 3, characterized in that: A slope for avoiding the telescopic cylinder is provided on the lower side of one end of the top beam connected to the front beam.

5. The tunnel end hydraulic support according to claim 1, characterized in that: The length of the top beam is greater than the length of the front beam.

6. The tunnel end hydraulic support according to claim 1 or 5, characterized in that: The column shoe is hinged to the bottom of the front beam jack, and the column shoe, the front beam jack and the front beam move with the top beam base.

7. The tunnel end hydraulic support according to claim 6, characterized in that: The telescopic range value of the front beam jack is greater than the telescopic range value of the top beam jack.

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