Automatic telescopic safety protection device for reversed loader tail

Abstract

According to the technical scheme, the automatic telescopic safety protection device comprises a middle baffle, a left telescopic guardrail, a right telescopic guardrail and a horizontal traction seat, a plurality of layers of circular guide sleeves are arranged on the middle baffle, telescopic rods of the left telescopic guardrail and the right telescopic guardrail can freely slide on the guide sleeves, and the horizontal traction seat is arranged on the middle baffle. The middle baffle is fixed to a reversed loader chute, the horizontal traction seats are fixed to the end faces of speed reducers of machine heads of the front conveyor and the rear conveyor respectively, and when the conveyors move, the telescopic guardrails synchronously move along with the machine heads of the conveyors under the action of the horizontal traction seats, so that a safety protection space is formed between the speed reducers of the front conveyor and the rear conveyor. Operators are prevented from mistakenly entering the reversed loader chute, and meanwhile large coal blocks are blocked in the reversed loader chute. Automatic following movement of the safety protection device can be achieved without external power, the structure is simple and compact, and work is stable and reliable.

Description

Technical Field

[0001] The present invention relates to an automatic telescopic safety protection device for the tail landing section of a transfer machine in a fully-mechanized top coal caving working face, which can prevent workers from mistakenly entering the transfer machine chute, and also block large pieces of coal in the transfer machine chute, thereby ensuring the safety of the working environment. Background Art

[0002] In the fully mechanized top-coal caving face, two front and rear scraper conveyors unload the raw coal onto the transfer machine's landing chute. The landing chute has a baffle on one side and an unbaffle on the other. The scraper conveyor heads overlap the unbaffled side of the transfer machine's landing chute to unload the raw coal into the transfer machine's chute. A hydraulic support for the working roadway roof is located between the two scraper conveyors.

[0003] Due to the mining process, the front and rear scraper conveyors and the transfer machine need to move alternately forward in line with the working face's advancement. Therefore, the landing section of the transfer machine's chute between the front and rear scraper conveyors cannot be protected by fixed baffles. A certain amount of movable clearance is required to enable the equipment's alternating movement. During operation, operators can easily enter the transfer machine chute through this gap, posing a safety hazard.

[0004] At present, the safety protection devices used in the chute of the landing section of the transfer machine include protective chains, telescopic baffles and other types (patent numbers CN201210355043.2, CN201410610439.6, CN201620101306.0). The following problems exist in use: ordinary protective chain protection devices have a simple structure and light weight, but the protection is not strict enough and the strength is insufficient, posing a safety hazard; the telescopic baffle type protection device has a complex structure and uses a hydraulic cylinder as the power source. The telescopic action requires manual control, and the protective plate is heavy, the movement is not flexible, and it is easy to get stuck, resulting in poor working reliability. Summary of the Invention In order to solve the problem that the existing safety protection device of the landing section of the tail of the transfer machine requires manual intervention and has poor safety protection effect, the present invention provides a sturdy and reliable safety protection device that can automatically achieve closed protection of the dangerous area without manual intervention and additional power devices.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an automatic telescopic safety protection device at the tail of a transfer machine, comprising an intermediate fixed baffle 1, a telescopic guardrail 3, and a horizontal traction seat 4, characterized in that a plurality of circular guide sleeves 1a are provided on the intermediate fixed baffle 1, a connecting flange 1b is provided at the bottom of the intermediate fixed baffle 1, and telescopic guardrails 3 are symmetrically arranged on the left and right sides of the intermediate fixed baffle 1, the intermediate fixed baffle 1 is installed on the transfer machine chute 8, and the telescopic guardrails 3 on the left and right sides are respectively connected to the end faces of the front conveyor reducer 6 and the rear conveyor reducer 7 through the horizontal traction seat 4, the vertical connecting rod 3f on the side of the telescopic guardrail 3 and the horizontal connecting rod 4a of the horizontal traction seat 4 cross each other, so that the telescopic guardrail 3 can move with the movement of the front conveyor reducer 6 and the rear conveyor reducer 7, and the vertical connecting rod 3f and the horizontal connecting rod 4a cross each other, so that the up and down misalignment and the front and back relative movement of the conveyor reducer and the transfer machine chute can be fully compensated.

[0006] The automatic telescopic safety protection device at the tail of the transfer machine described in the present invention adopts an easily disassembled structure. The telescopic rod 3b is assembled and fixed with the connecting seat 3a of the telescopic guardrail 3 by the connecting bolt 3c, and the vertical connecting rod 3f is assembled and fixed with the positioning sleeve 3m of the telescopic guardrail 3 by the connecting pin 3e, which is convenient for on-site disassembly and assembly and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings constituting the present invention are used to provide a further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute improper limitations on the present invention.

[0008] In the attached figure: Figure 1 The present invention is a schematic structural diagram of an automatic telescopic safety protection device for the tail of a transfer machine.

[0009] Figure 2 It is a schematic diagram of the installation arrangement of an automatic telescopic safety protection device at the tail of a transfer machine and the fully mechanized mining working face equipment according to the present invention.

[0010] Figure 3 The utility model is a detailed schematic diagram of a part of an automatic telescopic safety protection device at the tail of a transfer machine according to the present invention.

[0011] In the figure, there are the middle fixed baffle 1, the circular guide sleeve 1a, the connecting flange 1b, the telescopic guardrail 3, the connecting sleeve 3a, the telescopic rod 3b, the bolt 3c, the connecting pin 3e, the vertical connecting rod 3f, the rectangular hole 3h, the positioning sleeve 3m, the horizontal traction seat 4, the horizontal connecting rod 4a, the front scraper conveyor head reducer 6, the front scraper conveyor head 6a, the rear scraper conveyor head reducer 7, the rear scraper conveyor head 7a, the transfer machine chute 8, the hydraulic support 9, and the transfer machine tail 10. DETAILED DESCRIPTION The technical solutions in the embodiments of the present invention are described completely and clearly below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0012] like Figures 1 to 3 As shown, an automatic telescopic safety protection device for the tail of a transfer machine includes an intermediate fixed baffle 1, a telescopic guardrail 3, and a horizontal traction seat 4. The intermediate fixed baffle 1 has multiple circular guide sleeves 1a. The intermediate fixed baffle 1 is fixed to the transfer machine chute 8 through a connecting flange 1b at the bottom. The telescopic guardrails 3 are symmetrically arranged on the left and right sides of the intermediate fixed baffle 1. The telescopic guardrails 3 on the left and right sides are respectively connected to the end faces of the front conveyor reducer 6 and the rear conveyor reducer 7 through the horizontal traction seat 4. When the head reducer 6 or the head reducer 7 moves, the telescopic guardrails are driven by the traction seat 4. 3 moves, and the telescopic rod 3a slides in the circular guide sleeve 1a, so that a safe space is formed by the front scraper conveyor head reducer 6, the rear scraper conveyor head reducer 7, the middle fixed baffle 1, the left telescopic guardrail 3 and the right telescopic guardrail 3. This safe space is always separated from the space in the transfer machine chute 8 to prevent operators from accidentally entering the transfer machine chute during equipment operation. At the same time, large pieces of raw coal unloaded from the front scraper conveyor head 6a and the rear scraper conveyor head 7a are also confined in the transfer machine chute 8, ensuring the safety of people outside the chute.

[0013] like Figure 1 As shown, the central fixed baffle 1 is provided with multiple circular guide sleeves 1a, arranged vertically and covering the entire baffle surface. These sleeves 1a can be staggered to provide guidance for the telescopic rods 3b of the left and right telescopic guardrails 3. The circular tubes provide excellent guidance. The staggered arrangement of the left and right telescopic rods 3b not only meets the protection requirements, but also reduces the weight of the guardrail 3 and reduces operational resistance.

[0014] like Figure 3 As shown, the vertical connecting rod 3f on the side of the telescopic guardrail 3 and the horizontal connecting rod 4a of the horizontal traction seat 4 cross each other, so that the upper and lower misalignment and front and rear relative movement of the front and rear conveyor reducers 6 and 7 and the transfer machine chute 8 can be effectively compensated, fully meeting the specific working conditions requirements of the comprehensive mining working face.

[0015] like Figure 3 As shown, the telescopic rod 3b of the telescopic guardrail 3 is fixed to the connecting sleeve 3a via bolts 3c, allowing for convenient and flexible on-site assembly. The vertical connecting rod 3f is secured to the positioning seat 3m of the telescopic guardrail 3 via a connecting pin 3e. When the equipment is shut down and personnel need to access the transfer machine chute 8 for maintenance, the telescopic rod 3f can be removed and the telescopic guardrail 3 can be manually pushed toward the intermediate fixed baffle 1, leaving ample walking space.

[0016] The present invention provides a technical solution for an automatically retractable safety protection device at the tail of a transfer machine. By rationally designing the connection method, the automatic retraction and extension of the protection device is achieved by utilizing the pushing action of the scraper conveyor and the transfer machine. The structure is simple and the operation is reliable. The main components use round tubes as guide rails and guardrails, and adopt a split structure that is easy to assemble on site, which facilitates installation, maintenance and on-site adjustment, while also reducing manufacturing costs and production difficulty.

Claims

1. An automatic telescopic safety protection device for the tail of a transfer machine, comprising an intermediate fixed baffle (1), a telescopic guardrail (3), and a horizontal traction seat (4), characterized in that A plurality of circular guide sleeves (1a) are provided on the intermediate fixed baffle (1), a connecting flange (1b) is provided at the bottom of the intermediate fixed baffle (1), telescopic guardrails (3) are symmetrically arranged on the left and right sides of the intermediate fixed baffle (1), the intermediate fixed baffle (1) is installed on the transfer machine chute (8), and the telescopic guardrails (3) on the left and right sides are respectively connected to the end faces of the front conveyor reducer (6) and the rear conveyor reducer (7) through the horizontal traction seat (4).

2. The automatic retractable safety protection device for the tail of a transfer machine according to claim 1 is characterized in that: The vertical connecting rod (3f) on the side of the telescopic guardrail (3) passes through the horizontal traction seat (4), and the horizontal connecting rod (4a) of the horizontal traction seat (4) also passes through the rectangular hole (3h) of the telescopic guardrail (3).

3. The automatic retractable safety protection device for the tail of a transfer machine according to claim 1 is characterized by: The telescopic rod (3b) is assembled and fixed with the connecting seat (3a) of the telescopic guardrail (3) via a connecting bolt (3c).

4. The automatic retractable safety protection device for the tail of a transfer machine according to claim 1 is characterized in that: The vertical connecting rod (3f) is fixed by assembling the connecting pin (3e) with the positioning sleeve (3m) of the telescopic guardrail (3).

Images