Portal hydraulic supports adapted to rectangular and arched tunnels

Abstract

This utility model provides a portal hydraulic support adapted to rectangular and arched tunnels, comprising a pair of telescopic columns and a crossbeam connected to the top of the pair of telescopic columns. The crossbeam has a receiving groove, and a support jack is provided at the bottom of the receiving groove. An embedded arched auxiliary beam is provided at the top of the support jack, capable of being received within the receiving groove. The embedded arched auxiliary beam is used to provide close support to the arched tunnel when the support jack is in the raised position. This portal hydraulic support adapted to rectangular and arched tunnels enables a single portal hydraulic support to simultaneously support both rectangular and arched tunnels.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic supports, specifically, to a portal hydraulic support adapted to rectangular and arched tunnels. Background Technology

[0002] Gantry hydraulic supports are widely used in underground coal mine roadway support, primarily for supporting the roof rock and protecting equipment and personnel. Traditional gantry hydraulic supports have a flat top surface, making them suitable only for rectangular roadways. When used in complex roadways with both rectangular and arched cross-sections, the top surface of the support beam may not fully conform to the arched roof, resulting in poor support effectiveness and difficulty in ensuring the support's own stability.

[0003] Utility model patent CN219529046U discloses a tunnel support system, including a support unit, an inclined support, and a support assembly. The support unit includes a first support assembly and a second support assembly, with the first support assembly having a larger dimension in the gravity direction than the second support assembly. One end of the inclined support is connected to the first support assembly, and the other end is connected to the second support assembly; the inclined support is configured to support the external roof. The support assembly includes a first end and a second end, the position of the first end relative to the second end is adjustable, the first end is connected to the first support assembly, and the second end is connected to the inclined support. When this tunnel support system is applied to situations where the angle between the roof and the horizontal direction is large, the support assembly can create a stable structure between the first support assembly and the inclined support, avoiding or reducing the risk of lateral slippage of the first support assembly and reducing safety hazards. However, the structure disclosed in this tunnel support system is only suitable for inclined tunnels and is not suitable for supporting rectangular or arched tunnels. Utility Model Content

[0004] To enable a single gantry hydraulic support to support both rectangular and arched tunnels, the technical solution adopted in this utility model is as follows: a gantry hydraulic support adaptable to rectangular and arched tunnels, comprising a pair of telescopic columns and a crossbeam connected to the top of the pair of telescopic columns. The crossbeam has a storage groove, a support jack is provided at the bottom of the storage groove, and an embedded arched auxiliary beam is provided at the top of the support jack that can be stored in the storage groove.

[0005] The embedded arched auxiliary beam is used to support the arched tunnel when the supporting jack is in the lifting state.

[0006] Based on the above, in order to avoid interference during the storage of the embedded arched auxiliary beam, the storage groove is a rectangular storage groove, and the length of the storage groove is greater than the projected length of the embedded arched auxiliary beam.

[0007] Based on the above, the embedded arched auxiliary beam is hinged to the telescopic end of the supporting jack.

[0008] Based on the above, in order to improve the fit between the embedded arched auxiliary beam and the arched tunnel, the upper side of the embedded arched auxiliary beam is an upwardly convex arc surface.

[0009] Based on the above, in order not to affect the crossbeam's support for the rectangular tunnel, when the support jack is in the lowered state, the upper surface of the embedded arched auxiliary beam is lower than the upper surface of the receiving groove.

[0010] Based on the above, in order not to affect the crossbeam's support for the rectangular tunnel, when the support jack is in the lowered state, the upper surface of the embedded arched auxiliary beam is flush with the upper surface of the receiving groove.

[0011] Based on the above, in order to increase the stability of the support, a pair of support jacks are detachably provided at the bottom of the storage slot. The support jacks are located at both ends of the storage slot, and the bottom of the support jacks extends out of the storage slot.

[0012] This utility model has substantial features and advancements compared to existing technologies. Specifically, the portal hydraulic support adapted to rectangular and arched tunnels provided by this utility model has a receiving groove on the crossbeam of the existing portal hydraulic support. A pair of support jacks are installed in the receiving groove, and an embedded arched auxiliary beam is connected between the pair of support jacks. Thus, when encountering an arched tunnel, the embedded arched auxiliary beam can be pushed out of the receiving groove and pressed tightly against the top of the arched tunnel by the lifting action of the support jacks. This improves the fit with the arched top plate of the tunnel and enhances the support effect.

[0013] Furthermore, the embedded arched auxiliary beam can be retracted onto the crossbeam, allowing direct support when encountering rectangular tunnels, thus enabling a single gantry hydraulic support to simultaneously support both rectangular and arched tunnels.

[0014] Furthermore, by using support jacks to lift the embedded arched auxiliary beam, the embedded arched auxiliary beam can be lifted to any height within the lifting stroke of the support jacks, making it adaptable to arched roofs of different heights. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the portal hydraulic support adapted to rectangular and arched tunnels provided by this utility model.

[0016] Figure 2 This is a schematic diagram of the top structure of a portal hydraulic support adapted to rectangular and arched tunnels provided by this utility model.

[0017] In the diagram: 1. Telescopic column; 2. Support jack; 3. Crossbeam; 4. Embedded arched auxiliary beam; 5. Storage slot. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] Example 1

[0020] This embodiment provides a portal hydraulic support adapted to rectangular and arched tunnels, such as... Figure 1 , Figure 2 As shown, it includes a pair of telescopic columns 1 and a crossbeam 3 connected to the top of the pair of telescopic columns. The crossbeam 3 has a storage groove 5, the bottom of the storage groove 5 is provided with a support jack 2, and the top of the support jack 2 is provided with an embedded arched auxiliary beam 4 that can be stored in the storage groove 5.

[0021] The embedded arched auxiliary beam 4 is used to support the arched tunnel when the support jack 2 is in the lifting state. In this embodiment, the embedded arched auxiliary beam 4 is hinged to the telescopic end of the support jack 2.

[0022] Specifically, in order to improve the fit between the embedded arched auxiliary beam and the arched tunnel, the upper side of the embedded arched auxiliary beam 4 is an upwardly convex arc surface.

[0023] In this embodiment, in order not to affect the crossbeam's support for the rectangular tunnel, when the support jack 2 is in the lowered state, the upper surface of the embedded arched auxiliary beam 4 is lower than the upper surface of the receiving groove 5.

[0024] Example 2

[0025] This embodiment provides a portal hydraulic support adapted to rectangular and arched tunnels. The main difference from Embodiment 1 is that, in this embodiment, to increase support stability, a pair of support jacks 2 are detachably installed at the bottom of the receiving groove 5. The support jacks 2 are located at both ends of the receiving groove 5, and their bottoms extend out of the receiving groove 5. The two ends of the embedded arched auxiliary beam 4 are hinged to the two ends of the support jacks 2, respectively.

[0026] Example 3

[0027] This embodiment provides a portal hydraulic support adapted to rectangular and arched tunnels. The main difference from Embodiment 1 is that, in this embodiment, in order not to affect the support of the crossbeam for the rectangular tunnel, when the support jack 2 is in the lowered state, the upper surface of the embedded arched auxiliary beam 4 is flush with the upper surface of the receiving groove.

[0028] Example 4

[0029] This embodiment provides a portal hydraulic support adapted to rectangular and arched tunnels. The main difference from Embodiment 1 is that, in this embodiment, to avoid interference during the storage of the embedded arched auxiliary beam, the storage groove 5 is a rectangular storage groove, and the length of the storage groove 5 is greater than the projected length of the embedded arched auxiliary beam.

[0030] Specifically, the curvature of the embedded arched auxiliary beam can be designed according to the arch curvature of the tunnel roof. The embedded arched auxiliary beam can be a multi-plate welded structural component or a single-plate pressed component; it can be integral or a combination of multiple components.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A portal hydraulic support suitable for rectangular and arched shaped roadways comprising a pair of telescopic uprights and a crossbeam connected at the top of the pair of telescopic uprights, characterized in that: The crossbeam is provided with a storage groove, the bottom of the storage groove is provided with a support jack, and the top of the support jack is provided with an embedded arched auxiliary beam that can be stored in the storage groove. The embedded arched auxiliary beam is used to support the arched tunnel when the supporting jack is in the lifting state.

2. The portal hydraulic support adapted to rectangular and arched gateways according to claim 1, characterized in that: The storage slot is a rectangular storage slot, and the length of the storage slot is greater than the projected length of the embedded arched auxiliary beam.

3. The portal hydraulic support adapted to rectangular and arched shaped gateways as claimed in claim 1 wherein: The embedded arched auxiliary beam is hinged to the telescopic end of the supporting jack.

4. The portal hydraulic support adapted to rectangular and arched gateways according to claim 1 or 2 or 3, characterized in that: The upper side of the embedded arched auxiliary beam is an upwardly convex arc surface.

5. The portal hydraulic support adapted to rectangular and arched tunnels according to claim 4, characterized in that: When the supporting jack is in the lowered state, the upper surface of the embedded arched auxiliary beam is lower than the upper surface of the storage groove.

6. The portal hydraulic support adapted to rectangular and arched gateways according to claim 4, characterized in that: When the supporting jack is in the lowered state, the upper surface of the embedded arched auxiliary beam is flush with the upper surface of the storage groove.

7. The portal hydraulic support adapted to rectangular and arched shaped gateways as claimed in claim 1 or 2 or 3 wherein: A pair of support jacks are detachably provided at the bottom of the storage slot. The support jacks are located at both ends of the storage slot, and the bottom of the support jacks extends out of the storage slot.

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