Hydraulic support structural member shield beam tail waste rock blocking protection mechanism

Abstract

The utility model provides a hydraulic support structural member shield beam tail waste rock blocking protection mechanism which is rotatably installed among a shield beam, a base rear gap bridge and a pair of rear connecting rods and comprises a main body waste rock blocking plate and an arc-shaped lap joint plate, and the upper end of the main body waste rock blocking plate is hinged to the tail of the shield beam. The arc-shaped lap joint plate is connected to the lower end of the main body waste rock blocking plate, and the arc-shaped lap joint plate is arranged in an upward bending mode and used for being in lap joint to a base rear gap bridge in a sliding mode when the shield beam ascends and descends, so that a gap between the pair of rear connecting rods is located in a protection area formed by the main body waste rock blocking plate and the arc-shaped lap joint plate. The hydraulic support structural member shield beam tail waste rock blocking protection mechanism not only can meet the hydraulic support shield beam tail waste rock blocking protection requirement, but also can reduce the manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic supports, specifically to a rockfall protection mechanism at the tail of a hydraulic support structural component shield beam. Background Technology

[0002] During coal seam mining, to improve the protective capability of hydraulic supports, when the maximum support height exceeds 2800mm, the rear connecting rod component of the hydraulic support structure is usually equipped with a rock-blocking plate to prevent rockfall from the goaf from flowing into the working area enclosed by the shield beam, front connecting rod, rear connecting rod, and base. However, when the maximum support height is between 2000mm and 2800mm, the limited space inside the rear connecting rod component of the hydraulic support structure makes it impossible to install a rock-blocking plate. Currently, protection is mainly achieved by using protective nets and circular chains, but these methods have drawbacks such as poor rock-blocking protection or high manufacturing costs.

[0003] Utility model patent CN216691129U discloses a rear rock-blocking device for a hydraulic support top beam. The device includes a hydraulic support top beam and a shield beam rotatably connected to it. Two sets of rotating cylinders are fixedly installed at the rear end of the hydraulic support top beam. Two movable baffles are positioned corresponding to the two rotating cylinders. A rotating shaft passes through the movable baffles and the rotating cylinders, connecting and fixing the movable baffles to the rear of the hydraulic support top beam. This rear rock-blocking device, installed at the rear of the hydraulic support top beam, effectively ensures that the movable baffles always overlap the top plate of the shield beam during the support's lifting and lowering process and in various postures. Furthermore, the baffles swing with the shield beam, thus providing secondary rock-blocking protection at the top-shear hinge, reducing rock leakage at the hinge. However, the disclosed structure of this rear rock-blocking device is for secondary protection of the rear of the hydraulic support top beam and is not suitable for secondary protection of the tail of the shield beam of a hydraulic support with changing angles. Utility Model Content

[0004] In order to meet the requirements of rockfall protection at the tail of the hydraulic support shield beam while reducing manufacturing costs, the technical solution adopted by this utility model is: a rockfall protection mechanism at the tail of the hydraulic support structural component shield beam, which is rotatably installed between the shield beam, the rear overpass of the base and a pair of rear connecting rods, including a main rockfall protection plate and an arc-shaped overlapping plate, wherein the upper end of the main rockfall protection plate is hinged to the tail of the shield beam;

[0005] The arc-shaped lap plate is connected to the lower end of the main rock-blocking plate, and the arc-shaped lap plate is bent upwards to slide and overlap on the rear overpass of the base when the shield beam is raised and lowered, so that the gap between the pair of rear connecting rods is located within the protective area formed by the main rock-blocking plate and the arc-shaped lap plate.

[0006] Based on the above, in order to improve structural strength, the main rock-blocking plate and the arc-shaped overlapping plate are integrally formed.

[0007] Based on the above, in order to facilitate rotational assembly, a pair of second hinged lugs are provided at the tail of the shield beam, and two sets of first hinged lugs are provided at the upper end of the main rock-blocking plate. The first hinged lugs and the second hinged lugs are rotatably connected by a pin.

[0008] Based on the above, two sets of the first hinged ear plates are disposed on the upper surface of the main rock-blocking plate so that when the shield beam is in the lowered state, the upper edge of the main rock-blocking plate forms a geometric limit with the tail of the shield beam, thereby making the arc-shaped overlapping plate in a suspended state.

[0009] Based on the above, the width of the main rock-blocking plate is the same as the width of the arc-shaped overlapping plate.

[0010] Based on the above, in order to improve the protection effect, when the protective beam is in the lifted state, the rear overpass of the base is tangent to the arc portion of the arc-shaped overlapping plate.

[0011] Based on the above, in order to facilitate installation, the main rock-blocking plate is provided with a lifting hole, which is located at the hinge end of the main rock-blocking plate.

[0012] Based on the above, in order to avoid interference, the main slag baffle plate is provided with a notch to avoid the sewage discharge seat at the tail of the shield beam.

[0013] This utility model represents a substantial advancement over existing technologies. Specifically, it provides a tail-end rock-blocking protection mechanism for a hydraulic support structure. By hinged a main rock-blocking plate at the bottom of the support beam and connecting an arc-shaped overlapping plate to the bottom of the main rock-blocking plate, the arc-shaped overlapping plate can overlap the rear bridge of the base when the support is raised, effectively sealing a pair of rear connecting rods and improving the rear protection capability of the support. During the descent of the support, the main rock-blocking plate and the arc-shaped overlapping plate slide backward on the rear bridge of the base, providing follow-up protection for the rear of the support. The entire movement process is smooth. Furthermore, compared to existing protective nets and circular chains, this main rock-blocking plate and arc-shaped overlapping plate are an integrated structure with higher structural strength, easier processing and mass production, and lower manufacturing costs.

[0014] Therefore, the tail rock-blocking protection mechanism of the hydraulic support structure can not only meet the rock-blocking protection requirements of the tail rock-blocking of the hydraulic support structure, but also reduce manufacturing costs. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of the hydraulic support structure component, the tail rock-blocking protection mechanism, in the raised state.

[0016] Figure 2 This is a schematic diagram of the structure of the hydraulic support structure component, the tail rock-blocking protection mechanism, in the lowered state.

[0017] Figure 3 This is a cross-sectional structural diagram of a hydraulic support structure component, specifically a tail rock-blocking protection mechanism for a shield beam.

[0018] Figure 4 This is a schematic diagram of the top structure of the tail rock-blocking protection mechanism of a hydraulic support structure provided by this utility model.

[0019] Figure 5 This is a side view of the protective mechanism for the tail of the shield beam of a hydraulic support structure provided by this utility model.

[0020] In the diagram: 1. Protective beam; 2. First hinged ear plate; 3. Waste rock baffle assembly; 4. Support base; 5. Top beam; 6. Rear connecting rod; 7. Rear overpass of base; 8. Second hinged ear plate; 9. Arc-shaped lap plate; 10. Main waste rock baffle; 11. Pin shaft; 12. Lifting hole; 13. Notch. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0022] Example 1

[0023] This embodiment provides a rockfall protection mechanism at the tail of a hydraulic support structural component shield beam, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a rotatable assembly is installed between the shield beam 1, the rear bridge 7 of the base, and a pair of rear connecting rods 6. It includes a main rock-blocking plate 10 and an arc-shaped overlapping plate 9, with the upper end of the main rock-blocking plate 10 hinged to the tail of the shield beam 1. The main rock-blocking plate 10 and the arc-shaped overlapping plate 9 form a rock-blocking plate assembly 3. The shield beam 1 is located at the rear of the top beam 5. The rear bridge 7 of the base and the pair of rear connecting rods 6 are mounted on the support base 4.

[0024] The arc-shaped lap plate 9 is connected to the lower end of the main rock-blocking plate 10, and the arc-shaped lap plate 9 is bent upwards to slide and overlap on the rear bridge 7 of the base when the shield beam 1 is raised and lowered, so that the gap between the pair of rear connecting rods 6 is located in the protective area formed by the main rock-blocking plate 10 and the arc-shaped lap plate 9.

[0025] In this embodiment, to improve structural strength, the main rock-blocking plate 10 and the arc-shaped overlapping plate 9 are integrally formed. To facilitate rotational assembly, a pair of second hinged lugs 8 are provided at the tail of the shield beam 1, and two sets of first hinged lugs 2 are provided at the upper end of the main rock-blocking plate 10. The first hinged lugs 2 and the second hinged lugs 8 are rotatably connected by a pin 11.

[0026] Two sets of the first hinged ear plates 2 are disposed on the upper surface of the main rock-blocking plate 10 so that when the shield beam 1 is in the lowered state, the upper edge of the main rock-blocking plate 10 forms a geometric limit with the tail of the shield beam 1, thereby making the arc-shaped overlapping plate 9 suspended in the air.

[0027] Example 2

[0028] This embodiment provides a rockfall protection mechanism at the tail of a hydraulic support structure shield beam. The main difference from Embodiment 1 is that in this embodiment, the width of the main rockfall plate 10 is the same as the width of the arc-shaped overlapping plate 9.

[0029] Example 3

[0030] This embodiment provides a rockfall protection mechanism at the tail of a hydraulic support structure shield beam. The main difference from Embodiment 1 is that, in order to improve the protection effect, when the shield beam 1 is in the lifting state, the rear overpass 7 of the base is tangent to the arc portion of the arc-shaped overlapping plate 9.

[0031] Example 4

[0032] This embodiment provides a rockfall protection mechanism at the tail of a hydraulic support structure shield beam. The main difference from Embodiment 1 is that, in this embodiment, for ease of installation, a lifting hole 12 is provided on the main rockfall protection plate 10, and the lifting hole 12 is located at the hinge end of the main rockfall protection plate 10.

[0033] Example 5

[0034] This embodiment provides a hydraulic support structure shield beam tail rock-blocking protection mechanism. The main difference from embodiment 1 is that, in order to avoid interference, the main rock-blocking plate 10 is provided with a notch 13 for avoiding the sewage discharge seat at the tail of the shield beam.

[0035] Specifically, the design principles and design parameters of the tail rock-blocking protection mechanism of the hydraulic support structure provided by this utility model are as follows.

[0036] Main rock-blocking plate length: To ensure better backward sliding of the rock-blocking mechanism, when the support is lowered to its lowest point, the rock-blocking mechanism should not drag on the ground when it hangs down naturally. Adjust the geometric limit of the main rock-blocking plate and the tail of the shield beam to ensure that the distance from the arc-shaped overlap plate to the ground is ≥20mm. When the support is raised to its highest point, the arc-shaped overlap plate and the bridge overlap position of the base should be tangent to each other in an arc. The angle between the main rock-blocking plate and the arc-shaped overlap plate is designed to be 90° and a lengthening amount greater than twice the thickness of the main rock-blocking plate is reserved.

[0037] Main baffle plate width: Measure the distance between a pair of rear connecting rods. The width of the main baffle plate can be 40mm smaller than the distance between a pair of rear connecting rods.

[0038] Specifically, taking the ZY5200 / 12 / 28D bracket as an example, we will illustrate the application scenarios of the rock-blocking plate adapting to full mining height:

[0039] 1. The minimum height of the support is 1200mm: When the column is lowered to the lowest point, the minimum height of the hydraulic support is about 1200mm. By adjusting the geometric limit of the main rock-blocking plate and the tail of the shield beam, ensure that the angle between the main rock-blocking plate and the ground is 60 degrees, and ensure that the distance between the arc-shaped overlapping plate and the ground is greater than or equal to 20mm when naturally drooping.

[0040] 2. The maximum height of the support is 2800mm: When the column is raised to its highest point, the minimum height of the hydraulic support is about 2800mm. The arc-shaped lap plate is tangent to the arc at the lap position of the rear bridge of the base. The angle between the main block plate and the rear bridge of the base is 57 degrees, which allows the main block plate to slide smoothly backward.

[0041] 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 rockfall protection mechanism at the tail of a hydraulic support structure beam, rotatably mounted between the shield beam, the rear overpass of the base, and a pair of rear connecting rods, characterized in that: It includes a main rock-blocking plate and an arc-shaped overlapping plate, wherein the upper end of the main rock-blocking plate is hinged to the tail of the protective beam; The arc-shaped lap plate is connected to the lower end of the main rock-blocking plate, and the arc-shaped lap plate is bent upwards to slide and overlap on the rear overpass of the base when the shield beam is raised and lowered, so that the gap between the pair of rear connecting rods is located within the protective area formed by the main rock-blocking plate and the arc-shaped lap plate.

2. The hydraulic support structure component shield beam tail rock-blocking protection mechanism according to claim 1, characterized in that: The main rock-blocking plate and the arc-shaped overlapping plate are integrally formed.

3. The hydraulic support structure component tail rock-blocking protection mechanism according to claim 1, characterized in that: The tail end of the shield beam is provided with a pair of second hinged lugs, and the upper end of the main rock-blocking plate is provided with two sets of first hinged lugs. The first hinged lugs and the second hinged lugs are rotatably connected by a pin.

4. The hydraulic support structure component shield beam tail rock-blocking protection mechanism according to claim 3, characterized in that: Two sets of the first hinged ear plates are disposed on the upper surface of the main rock-blocking plate so that when the shield beam is in the lowered state, the upper edge of the main rock-blocking plate forms a geometric limit with the tail of the shield beam, thereby making the arc-shaped overlapping plate in a suspended state.

5. A rockfall protection mechanism at the tail of a hydraulic support structural member shield beam according to claim 1, 2, 3, or 4, characterized in that: The width of the main rock-blocking plate is the same as the width of the arc-shaped overlapping plate.

6. A rockfall protection mechanism at the tail of a hydraulic support structural member shield beam according to claim 1, 2, 3, or 4, characterized in that: When the protective beam is in the lifted state, the rear overpass of the base is tangent to the arc portion of the arc-shaped overlapping plate.

7. The hydraulic support structure component shield beam tail rock-blocking protection mechanism according to claim 1, characterized in that: The main rock-blocking plate is provided with a lifting hole, which is located at the hinge end of the main rock-blocking plate.

8. The hydraulic support structure component shield beam tail rock-blocking protection mechanism according to claim 1, characterized in that: The main retaining plate has a notch for avoiding the sewage discharge seat at the tail of the protective beam.

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