Support mechanism for tunnel excavation support

Abstract

The present invention belongs to the technical field of tunnel excavation supports, and specifically relates to a supporting mechanism of a tunnel excavation support, including a primary protecting break, a secondary protecting break and a protecting break jack. Both the primary protecting break and the secondary protecting break are rectangular frames. A protective device I is arranged in the rectangular frame of the primary protecting break, and a protective device II is arranged in the rectangular frame of the secondary protecting break. Connecting rods are arranged on both sides of the primary protecting break, and one end of the connecting rod extending out of the upper side of the primary protecting break is hinged with a supporting mechanism. The protecting break jack is hinged between the upper side of the primary protecting break and the supporting mechanism. At least two secondary protecting break connecting plates are arranged on the lower side of the primary protecting break, and at least three pin holes are arranged on the secondary protecting break connecting plate. The secondary protecting break is hinged with the secondary protecting break connecting plate through a pin shaft. The invention sets the supporting mechanism into two levels, which can be adjusted according to the actual tunnel support situation. Compared with the prior art, the present application can achieve large-area high-strength support and improve safety.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel excavation supports, and in particular relates to a supporting mechanism of a tunnel excavation support. Background Art

[0002] At present, the support methods for the tunneling sections of underground coal mines are generally "U"-shaped sheds, trapezoidal sheds, anchor nets or anchor belt nets. The existing technology uses artificial construction to advance the top protection, or uses temporary support devices and airborne temporary support methods to protect the top. At present, there are many airborne temporary support methods, but their protection strength for the head section is low, the support area is relatively fixed, and it cannot be adjusted according to the actual situation, so that the existing guards have insufficient protection area to cover the entire section after use. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a supporting mechanism for a tunnel excavation support, which can adjust the support area according to actual support requirements, achieve large-area high-strength support, and improve safety.

[0004] The present invention is realized through the following technical scheme: a side protection mechanism of a tunnel excavation support, comprising a primary protection break, a secondary protection break and a protection break jack, the primary protection break and the secondary protection break are both rectangular frames, a protection device I is arranged in the rectangular frame of the primary protection break, and a protection device II is arranged in the rectangular frame of the secondary protection break; connecting rods are arranged on both sides of the left and right sides of the primary protection break, and one end of the connecting rod extending out of the upper side of the primary protection break is hinged with a support top mechanism; the protection break jack is hinged between the upper side of the primary protection break and the support top mechanism; at least two secondary protection break connecting plates are arranged on the lower side of the primary protection break, and at least three pin holes are arranged on the secondary protection break connecting plate, and the secondary protection break is hinged with the secondary protection break connecting plate through a pin shaft; when the secondary protection break is in a non-working state, the secondary protection break is retracted on the inner side of the primary protection break; when the secondary protection break is in a working state, the secondary protection break is flipped 180° toward the outer side of the primary protection break and the pin hole on the secondary protection break connecting plate is reselected to tighten the secondary protection break.

[0005] Furthermore, the protective device I is a mesh protection composed of a plurality of cross beam supports and a plurality of longitudinal beam supports.

[0006] Furthermore, steel wires are evenly distributed in the rectangular frame of the first-level protection along the arrangement direction of the cross beam support or the arrangement direction of the longitudinal beam support.

[0007] Furthermore, the protective device II includes a plurality of supporting beams, and all the supporting beams are arranged horizontally or longitudinally within the rectangular frame of the secondary protective barrier.

[0008] Furthermore, the secondary breaker guard connecting plate includes two connecting plates fixed in parallel on the primary breaker guard, and the pin hole on the secondary breaker guard connecting plate passes through its two connecting plates; a connecting bracket is provided on the upper side of the secondary breaker guard, and at least two pin holes are provided on the connecting bracket, and the connecting bracket is hinged between the two connecting plates of the corresponding secondary breaker guard connecting plate.

[0009] Furthermore, three pin holes are provided on the secondary guard breaking connecting plate, and two pin holes are provided on the connecting bracket. The pin hole on the connecting bracket close to the secondary guard breaking side is fixedly hinged with the pin hole in the middle of the secondary guard breaking connecting plate, and the pin hole on the connecting bracket away from the secondary guard breaking side is selectively hinged with the pin holes on both sides of the secondary guard breaking connecting plate according to the different working states of the secondary guard breaking.

[0010] Furthermore, two breaking jacks are provided.

[0011] The guard mechanism of the present invention can be folded and lifted to realize 180° rotation. The first-level guard adopts a guard jack to realize its rotation and support functions, and the guard jack provides support force; the second-level guard is connected to the first-level guard by a mechanical pin shaft, and when working, it is rotated down and clamped with the pin shaft; when not in use, it is rotated up and clamped with the pin shaft.

[0012] The beneficial effect of the present invention is that the present invention sets the protection mechanism into two levels, and can open the first-level protection support or open the first-level protection and the second-level protection support at the same time for support according to the actual situation of tunnel support. Compared with the prior art, the present application can achieve large-area high-strength support and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 This is a schematic structural diagram of the present invention when it is folded;

[0015] Figure 3 This is a schematic diagram of the structure of the present invention;

[0016] Figure 4 It is a structural schematic diagram of the second-level protection circuit breaker of the present invention when it is deployed relative to the first-level protection circuit breaker;

[0017] Figure 5 It is a structural schematic diagram of the second-level protection circuit breaker of the present invention when it is retracted relative to the first-level protection circuit breaker;

[0018] In the figure, 1. primary breaking guard, 11. connecting rod, 12. cross beam support, 13. longitudinal beam support, 14. steel wire, 2. secondary breaking guard, 21. support beam, 22. connecting bracket, 3. breaking guard jack, 4. supporting mechanism, 5. secondary breaking guard connecting plate, 51. connecting piece. DETAILED DESCRIPTION

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 5 As shown, a supporting mechanism of a tunnel excavation support includes a primary protective break 1, a secondary protective break 2 and a protective break jack 3. The primary protective break 1 and the secondary protective break 2 are both rectangular frames. A protective device I is arranged in the rectangular frame of the primary protective break 1. Furthermore, the protective device I is a mesh protection composed of a plurality of cross beam supports 12 and a plurality of longitudinal beam supports 13, forming a dense and stable support. A protective device II is arranged in the rectangular frame of the secondary protective break 2. Furthermore, the protective device II includes a plurality of support beams 21. All the support beams 21 are arranged horizontally or longitudinally in the rectangular frame of the secondary protective break 2. The support height of the secondary protective break 2 is lower than that of the primary protective break 1. The harm caused by the falling of foreign objects at a low place is smaller than that caused by the falling of foreign objects at a high place. Therefore, the support density of the secondary protective break 2 is sparser than that of the primary protective break 1, and it is sufficient to prevent large foreign objects from falling. The left and right sides of the first-level guard 1 are provided with connecting rods 11, and one end of the connecting rod 11 extends out from the upper side of the first-level guard 1 and is hinged with the support mechanism 4; the guard jack 3 is hinged between the upper side of the first-level guard 1 and the support mechanism 4, and two guard jacks 3 are provided, and the two guard jacks 3 are evenly distributed on the upper side of the first-level guard 1; at least two second-level guard connecting plates 5 are provided on the lower side of the first-level guard 1, and at least three pin holes are provided on the second-level guard connecting plate 5, and the second-level guard 2 is hinged to the second-level guard connecting plate 5 through a pin shaft; Figure 2 and Figure 5 As shown, when the secondary protection circuit breaker 2 is in a non-working state, the secondary protection circuit breaker 2 is retracted inside the primary protection circuit breaker 1; Figure 1 , Figure 3 and Figure 4 As shown, when the secondary guard 2 is in working state, the secondary guard 2 is turned 180° toward the outside of the primary guard 1 and the pin hole on the secondary guard connection plate 5 is reselected to fasten the secondary guard 2. When support is needed, the support angle of the primary guard 1 is controlled by the extension length of the guard jack 3, while the support of the secondary guard 2 is manually adjusted by the construction personnel.

[0021] Specifically, steel wires 14 are evenly distributed in the rectangular frame of the primary protective frame 1 along the arrangement direction of the cross beam support 12 or the arrangement direction of the longitudinal beam support 13 .

[0022] Specifically, the secondary breaker protection connecting plate 5 includes two connecting plates 51 fixed in parallel on the primary breaker protection 1, and the pin hole on the secondary breaker protection connecting plate 5 penetrates its two connecting plates 51; the upper side of the secondary breaker protection 2 is provided with a connecting bracket 22, and the connecting bracket 22 is provided with at least two pin holes, and the connecting bracket 22 is hinged between the two connecting plates 51 of the corresponding secondary breaker protection connecting plate 5.

[0023] Preferably, the secondary protection breaker connecting plate 5 is provided with three pin holes, and the connecting bracket 22 is provided with two pin holes. The pin hole on the connecting bracket 22 close to the secondary protection breaker 2 is fixedly hinged with the pin hole in the middle of the secondary protection breaker connecting plate 5, and the pin hole on the connecting bracket 22 away from the secondary protection breaker 2 is selected to be movably hinged with the pin holes on both sides of the secondary protection breaker connecting plate 5 according to the different working states of the secondary protection breaker 2. For the sake of convenience in description, we define the three pin holes on the secondary protection breaker connecting plate 5 as the first pin hole, the second pin hole and the third pin hole in the direction from the upper side of the primary protection breaker 1 to the lower side of the primary protection breaker 1; we define the two pin holes on the connecting bracket 22 as the fourth pin hole and the fifth pin hole in the direction from one end where the secondary protection breaker 2 is hinged with the primary protection breaker to the other opposite end of the secondary protection breaker 2; the second pin hole and the fourth pin hole are fixedly hinged, that is, as the working state of the secondary protection breaker 2 is different, the secondary protection breaker 2 needs to be manually rotated around the fixed hinge to move. Figure 2 and Figure 5 As shown, when the secondary protection 2 is in a non-working state, the secondary protection 2 is retracted inside the primary protection 1. At this time, the first pin hole and the fifth pin hole are fastened by a pin shaft; Figure 1 , Figure 3 and Figure 4 As shown, when the secondary protective breaker 2 is in working condition, remove the pins fixed in the first pin hole and the fifth pin hole, manually flip the secondary protective breaker 2 180° toward the outside of the primary protective breaker 1, and then insert the pins into the third pin hole and the fifth pin hole.

[0024] The present invention sets the supporting mechanism into two levels. According to the actual situation of tunnel support, the first-level supporting mechanism can be opened or the first-level and second-level supporting mechanisms can be opened at the same time for support. Compared with the prior art, the present application can achieve large-area high-strength support and improve safety.

Claims

1. A supporting mechanism for a tunnel excavation support, characterized in that: The invention comprises a primary protective breaker (1), a secondary protective breaker (2) and a protective breaker jack (3), wherein the primary protective breaker (1) and the secondary protective breaker (2) are both rectangular frames, a protective device I is arranged in the rectangular frame of the primary protective breaker (1), and a protective device II is arranged in the rectangular frame of the secondary protective breaker (2); connecting rods (11) are arranged on both left and right sides of the primary protective breaker (1), and one end of the connecting rod (11) extending from the upper side of the primary protective breaker (1) is hinged to a supporting mechanism (4); the protective breaker jack (3) is hinged between the upper side of the primary protective breaker (1) and the supporting mechanism (4); At least two secondary protection break connecting plates (5) are provided on the lower side of the primary protection break (1), and at least three pin holes are provided on the secondary protection break connecting plates (5). The secondary protection break (2) is hinged to the secondary protection break connecting plates (5) via a pin shaft; when the secondary protection break (2) is in a non-working state, the secondary protection break (2) is retracted inside the primary protection break (1); when the secondary protection break (2) is in a working state, the secondary protection break (2) is turned 180 degrees toward the outside of the primary protection break (1) and the pin holes on the secondary protection break connecting plates (5) are reselected to tighten the secondary protection break (2).

2. The supporting mechanism of the tunnel excavation support according to claim 1 is characterized in that: The protective device I is a mesh protection composed of a plurality of cross beam supports (12) and a plurality of longitudinal beam supports (13).

3. The supporting mechanism of the tunnel excavation support according to claim 2 is characterized in that: Steel wires (14) are evenly distributed in the rectangular frame of the primary protection frame (1) along the arrangement direction of the cross beam supports (12) or the arrangement direction of the longitudinal beam supports (13).

4. The supporting mechanism of the tunnel excavation support according to claim 1 is characterized in that: The protective device II comprises a plurality of support beams (21), and all the support beams (21) are arranged transversely or longitudinally within the rectangular frame of the secondary protection barrier (2).

5. The supporting mechanism of the tunnel excavation support according to claim 1 is characterized in that: The secondary protection connecting plate (5) comprises two connecting plates (51) fixed in parallel on the primary protection (1), and the pin hole on the secondary protection connecting plate (5) penetrates through the two connecting plates (51) thereof; a connecting bracket (22) is provided on the upper side of the secondary protection (2), and at least two pin holes are provided on the connecting bracket (22), and the connecting bracket (22) is hinged between the two connecting plates (51) of the corresponding secondary protection connecting plate (5).

6. The supporting mechanism of the tunnel excavation support according to claim 5 is characterized in that: The secondary protection break connecting plate (5) is provided with three pin holes, and the connecting bracket (22) is provided with two pin holes. The pin hole on the connecting bracket (22) close to the secondary protection break (2) is fixedly hinged with the pin hole in the middle of the secondary protection break connecting plate (5), and the pin hole on the connecting bracket (22) away from the secondary protection break (2) is selectively hinged with the pin holes on both sides of the secondary protection break connecting plate (5) according to the different working states of the secondary protection break (2).

7. The supporting mechanism of the tunnel excavation support according to claim 1 is characterized in that: The described breaking jacks (3) are provided with two.

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