A protective support device for thin-layer coal mine mining

Abstract

The present invention relates to the technical field of coal mine protection, and specifically relates to a protective support device for thin-layer coal mine mining, which includes a support assembly arranged successively from bottom to top, a receiving plate installed on the support assembly, and a plurality of brackets installed on the receiving plate. An arc-shaped frame is provided in each bracket, and a flexible plate is provided on each arc-shaped frame. The flexible plate is connected to the arc-shaped frame through a plurality of springs. A pressure sensor is provided at the connection between the arc-shaped frame and the spring. An alarm is provided on the outer side of the arc-shaped frame. The pressure sensor is electrically connected to the alarm. A plurality of installation grooves are formed on the flexible plate for cooperating with a plurality of embedding rings on the protective plate. The present invention can detect the force conditions at multiple positions on the protective plate while supporting the thin layer.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine protection, and specifically relates to a protective support device for thin-layer coal mine mining. Background Art

[0002] With the increasing demand of the national economy for coal mine resources, the coal mine mining intensity has been continuously increasing. During coal mine mining, special attention should be paid to supporting the top of the coal mine at the thin layer to avoid the falling of stones from the coal mine at the thin layer or the collapse caused by excessive pressure.

[0003] During the support process, the pressure conditions received by each position of the support plate are also different. The traditional support device cannot timely analyze the stress conditions of multiple positions on the support plate, resulting in the fracture of a certain part of the support plate due to excessive pressure. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a protective support device for thin-layer coal mine mining, which can detect the stress conditions of multiple positions on the protective plate while supporting the thin layer.

[0005] To achieve the above object, the present invention provides the following technical solution: A protective support device for thin-layer coal mine mining, including a support component arranged successively from bottom to top, a receiving plate installed on the support component, and a plurality of brackets installed on the receiving plate. An arc-shaped frame is provided in each bracket, a flexible plate is provided on each arc-shaped frame, and the flexible plate and the arc-shaped frame are connected by a plurality of springs;

[0006] A pressure sensor is provided at the connection between the arc-shaped frame and the spring, an alarm is provided on the outer side of the arc-shaped frame, and the pressure sensor is electrically connected to the alarm;

[0007] A plurality of installation grooves are provided on the flexible plate for cooperating with a plurality of inlays on the protective plate.

[0008] Preferably, the support component includes a bottom plate, a sleeve installed on the bottom plate, and a trapezoidal block installed below the receiving plate. A rotatable threaded sleeve is provided inside the sleeve, and a threaded rod that is threadedly engaged with the inside of the threaded sleeve. The upper end of the trapezoidal block is wider than the lower end. Installation boxes one and two are provided on both sides of the sleeve, and the top of the threaded rod is rotatably arranged on the trapezoidal block.

[0009] Preferably, a rotatable worm installed on a fixed frame and a worm gear sleeved on the threaded sleeve are provided inside the installation box one, and the worm gear is meshed with the worm. A rotating handle is provided outside the installation box one, and the worm is connected to the rotating handle outside the installation box one through an output shaft.

[0010] Preferably, a limiting block is provided at the top of the worm gear, and a stop block and a motor are provided in the second mounting box. One end of the stop block is connected to the output end of the motor.

[0011] Preferably, a straight rod and two inclined rods are provided between the arc-shaped frame and the receiving plate. One ends of the two inclined rods are fixedly installed on the receiving plate, and the other ends of the two inclined plates are respectively installed on the opposite sides of the straight rod, forming a triangular shape.

[0012] Preferably, a plurality of auxiliary support rods are evenly distributed on one side of the two inclined rods facing the arc-shaped frame.

[0013] Preferably, the inner part of the inlay ring of the protective plate is made of a magnetic material, and a magnetic block is provided in the installation groove of the flexible plate.

[0014] Preferably, a support plate is provided on each of the four outer sides of the bottom plate, jointly forming a cross-shaped structure.

[0015] Preferably, a plurality of thin reinforcing rods and thick reinforcing rods inclined downward are circumferentially distributed on the outer side of the sleeve. One end of each thin reinforcing rod away from the sleeve is fixedly connected to the bottom plate, and one end of each thick reinforcing rod away from the sleeve is connected to the corresponding support plate.

[0016] Preferably, a plurality of storage grooves are formed on the bottom plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. A plurality of installation grooves are provided on the flexible plate for cooperating with a plurality of inlay rings on the protective plate. The flexible plate is made of a flexible material and can adapt to protective plates with different radian sizes. Therefore, the protective plate that can be adapted can be freely selected according to the radian of the support position, and it can automatically cooperate with the flexible plate below, increasing the applicability of the device to a certain extent.

[0019] 2. A pressure sensor is provided at the connection between the arc-shaped frame and the spring, and an alarm is provided on the outer side of the arc-shaped frame. The pressure sensor is electrically connected to the alarm. When the pressure sensor reaches a certain threshold value, it can transmit a signal to the alarm for alarming, so that the worker can carry out reinforcement treatment according to the corresponding position of the alarm.

[0020] 3. The inlay ring of the protective plate is made of a magnetic material, and a magnetic block is provided in the installation groove of the flexible plate. When the inlay ring enters the installation groove, the magnetic block can magnetically attract the inside of the inlay ring, strengthening the firmness between the protective plate and the flexible plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present invention easier to be clearly understood, the present invention will be further described in detail below according to specific embodiments in conjunction with the drawings.

[0022] Figure 1 Schematic diagram of the overall structure of the present invention;

[0023] Figure 2 Schematic diagram of the structural installation of the bracket, arc-shaped frame, spring and flexible plate of the present invention;

[0024] Figure 3 Schematic diagram of the structural installation of the inlay ring on the protective plate in the present invention;

[0025] Figure 4 Schematic diagram of the structural installation of the support assembly in the present invention;

[0026] Figure 5 Schematic diagram of the structural installation of the worm gear, worm, threaded sleeve and threaded rod in the present invention;

[0027] Figure 6 Schematic diagram of the structural installation of the stop block and the limit block in the present invention.

[0028] In the figure: 1, support assembly; 101, bottom plate; 102, sleeve; 1021, threaded sleeve; 1022, threaded rod; 103, trapezoidal block; 2, bearing plate; 3, bracket; 4, arc-shaped frame; 5, flexible plate; 6, spring; 7, alarm; 8, installation groove; 9, protective plate; 10, inlay ring; 11, installation box one; 1101, fixing frame; 1102, worm; 1103, worm gear; 12, installation box two; 1201, stop block; 1202, motor; 13, turning handle; 14, limit block; 15, straight rod; 16, inclined rod; 17, auxiliary support rod; 18, magnetic block; 19, support plate; 20, thin reinforcing rod; 21, thick reinforcing rod; 22, storage groove. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1-3 , a protective support device for thin-layer coal mine mining described in the present invention, including a support assembly 1 arranged in sequence from bottom to top, a bearing plate 2 installed on the support assembly 1, and a plurality of brackets 3 installed on the bearing plate 2. An arc-shaped frame 4 is provided in each bracket 3, and a flexible plate 5 is provided on each arc-shaped frame 4. The flexible plate 5 is connected to the arc-shaped frame 4 through a plurality of springs 6.

[0031] A pressure sensor is provided at the connection between the arc-shaped frame 4 and the spring 6. An alarm 7 is provided on the outer side of the arc-shaped frame 4. The pressure sensor is electrically connected to the alarm 7. When the pressure sensor reaches a certain threshold, it can transmit a signal to the alarm 7 for alarming. Then, the worker can reinforce it according to the corresponding position of the alarm.

[0032] A plurality of mounting grooves 8 are formed in the flexible plate 5 for cooperating with a plurality of inlays 10 on the protective plate 9 to fix the protective plate 9.

[0033] Please refer to Figure 4 , the support assembly 1 includes a bottom plate 101, a sleeve 102 installed on the bottom plate 101, and a trapezoidal block 103 installed below the bearing plate 2. A rotatable threaded sleeve 1021 is provided inside the sleeve 102, and a threaded rod 1022 that is threadedly engaged with the inside of the threaded sleeve 1021. The upper end of the trapezoidal block 103 is wider than the lower end, which can better support the bearing plate 2. Installation boxes one 11 and two 12 are provided on both sides of the sleeve 102, and the top of the threaded rod 1022 is rotatably provided on the trapezoidal block 103.

[0034] Please refer to Figure 5 , a rotatable worm 1102 installed on a fixed frame 1101 and a worm gear 1103 sleeved on the threaded sleeve 1021 are provided inside the installation box one 11, and the worm gear 1103 is engaged with the worm 1102. A rotary handle 13 is provided outside the installation box one 11. The worm 1102 is connected to the rotary handle 13 outside the installation box one 11 through an output shaft. Driven by the rotary handle 13, the worm 1102 can be rotated. When the worm 1102 rotates, it will drive the worm gear 1103 to rotate, and then drive the threaded sleeve 1021 to rotate, so that the threaded rod 1022 that is threadedly engaged with it completes the lifting action.

[0035] Please refer to Figure 6 , a limit block 14 is provided at the top of the worm gear 1103. A stop block 1201 and a motor 1202 are provided inside the installation box two 12. One end of the stop block 1201 is connected to the output end of the motor 1202.

[0036] In the initial stage, the stop block 1201 is on one side of the worm gear 1103. When the protective plate 9 approaches the top of the thin coal seam in the coal mine, the motor 1202 is started to rotate the stop block 1201 above the worm gear 1103. At this time, when the worm gear 1103 continues to rotate, the limit block 14 will be blocked by the stop block 1201 to prevent the threaded rod 1022 from rising too high, so that the protective plate 9 does not apply too much force to the thin coal seam in the reverse direction.

[0037] Please refer to Figure 2, between the arc-shaped frame 4 and the receiving plate 2, there are a straight rod 15 and two inclined rods 16. One end of each of the two inclined rods 16 is fixedly installed on the receiving plate 2, and the other ends of the two inclined plates are respectively installed on the opposite sides of the straight rod 15, forming a triangular shape, which can provide stronger support for the arc-shaped frame 4.

[0038] On the side of the two inclined rods 16 facing the arc-shaped frame 4, a plurality of auxiliary support rods 17 are evenly distributed, which can support multiple positions of the arc-shaped frame 4 and enhance the support effect.

[0039] Please refer to Figure 2 , the inlay ring 10 of the protective plate 9 is made of a magnetic material, and a magnetic block 18 is provided in the installation groove 8 of the flexible plate 5. When the inlay ring 10 is inserted into the installation groove 8, the magnetic block 18 can magnetically attract the inside of the inlay ring 10 to strengthen the firmness between the protective plate 9 and the flexible plate 5.

[0040] Please refer to Figure 4 , on the four outer sides of the bottom plate 101, there is a support plate 19 respectively, which together form a cross-shaped structure to improve the stability of the bottom of the support device.

[0041] On the outer circumference of the sleeve 102, a plurality of thin reinforcing rods 20 and thick reinforcing rods 21 inclined downward are distributed. One end of each thin reinforcing rod 20 away from the sleeve 102 is fixedly connected to the bottom plate 101, and one end of each thick reinforcing rod 21 away from the sleeve 102 is connected to the corresponding support plate 19.

[0042] A plurality of storage grooves 22 are provided on the bottom plate 101 for placing refuge supplies.

[0043] Working principle: During the installation process of the flexible plate 5 and the protection plate 9, since the flexible plate 5 is made of a flexible material, it can adapt to the protection plate 9 with different radian sizes. Therefore, it can freely select the appropriate protection plate 9 according to the radian of the support position and automatically cooperate with the flexible plate 5 below. There is a magnetic block 18 in the installation groove 8 of the flexible plate 5. When the inlay ring 10 is inserted into the installation groove 8, since the inside of the inlay ring 10 of the protection plate 9 is made of a magnetic material, the magnetic block 18 can magnetically attract the inside of the inlay ring 10 to strengthen the firmness between the protection plate 9 and the flexible plate 5. After the cooperation is completed, driven by the rotating handle 13, the worm 1102 can be rotated. The rotation of the worm 1102 will drive the worm wheel 1103 to rotate, and then drive the threaded sleeve 1021 to rotate, causing the threaded rod 1022 that is threadedly engaged with it to rise. When the protection plate 9 approaches the top of the thin coal seam in the coal mine, the motor 1202 is started to rotate the stop block 1201 above the worm wheel 1103. At this time, when the worm wheel 1103 continues to rotate, the limit block 14 will be clamped by the stop block 1201 to prevent the threaded rod 1022 from rising too high, causing the protection plate 9 to exert too much force on the thin coal seam in the reverse direction and causing danger. A pressure sensor is provided at the connection between the arc-shaped frame 4 and the spring 6, and an alarm 7 is provided on the outer side of the arc-shaped frame 4. The pressure sensor and the alarm 7 are electrically connected. When the pressure sensor reaches a certain threshold value, it can transmit a signal to the alarm 7 for alarm. Then, the worker can reinforce it according to the corresponding position of the alarm to prevent a certain part of the protection plate 9 from breaking due to excessive pressure.

[0044] The above is only the preferred solution of the present invention and is not intended to further limit the present invention. All equivalent changes made by using the content of the specification and drawings of the present invention are within the protection scope of the present invention.

Claims

1. A protective support device for thin-layer coal mine exploitation, comprising a support assembly (1) arranged successively from bottom to top, a bearing plate (2) installed on the support assembly (1), and a plurality of brackets (3) installed on the bearing plate (2), characterized in that, Each of the brackets (3) is provided with an arc frame (4), each of the arc frames (4) is provided with a flexible plate (5), and the flexible plate (5) and the arc frame (4) are connected via a plurality of springs (6); A pressure sensor is provided at the connection between the arc frame (4) and the spring (6), an alarm (7) is provided on the outer side surface of the arc frame (4), and the pressure sensor and the alarm (7) are electrically connected; The flexible plate (5) is provided with a plurality of mounting grooves (8) for cooperating with a plurality of insert rings (10) on the protective plate (9); The support assembly (1) comprises a base plate (101), a sleeve (102) mounted on the base plate (101), and a trapezoidal block (103) mounted below a receiving plate (2); a rotatable threaded sleeve (1021) and a threaded rod (1022) matched with the internal thread of the threaded sleeve (1021) are arranged inside the sleeve (102); the upper end of the trapezoidal block (103) is wider than the lower end; a first installation box (11) and a second installation box (12) are arranged on both sides of the sleeve (102); and the top of the threaded rod (1022) is rotatably arranged on the trapezoidal block (103); The installation box (11) is provided with a worm (1102) rotatably mounted on a fixing frame (1101) and a worm wheel (1103) sleeved on a threaded sleeve (1021), and the worm wheel (1103) is meshed with the worm (1102). The installation box (11) is provided with a rotary handle (13) on the outside, and the worm (1102) is connected to the rotary handle (13) on the outside of the installation box (11) via an output shaft.

2. The protective support device for thin-layer coal mine mining according to claim 1, wherein: A limit block (14) is provided on the top of the worm wheel (1103), a stop block (1201) and a motor (1202) are provided in the second installation box (12), and one end of the stop block (1201) is connected to the output end of the motor (1202).

3. A protective support device for thin-layer coal mine mining according to claim 1, characterized in that: A straight rod (15) and two inclined rods (16) are provided between the arc frame (4) and the receiving plate (2), one end of the two inclined rods (16) is fixedly mounted on the receiving plate (2), and the other ends of the two inclined plates are respectively mounted on opposite sides of the straight rod (15) to form a triangle shape.

4. The protective support device for thin-layer coal mine mining according to claim 3, characterized in that: A plurality of auxiliary support rods (17) are evenly distributed on one side of the two inclined rods (16) facing the arc-shaped frame (4).

5. A protective support device for thin-layer coal mine mining according to claim 1, characterized in that: The interior of the embedded ring (10) of the protective plate (9) is made of magnetic material, and a magnetic block (18) is provided in the mounting groove (8) of the flexible plate (5).

6. A protective support device for thin-layer coal mine mining according to claim 1, characterized in that: A support plate (19) is provided on each of the four outer side surfaces of the bottom plate (101), which together form a cross-shaped structure.

7. A protective support device for thin-layer coal mine mining according to claim 1, characterized in that: A plurality of thin reinforcing rods (20) and thick reinforcing rods (21) are distributed on the outer circumference of the sleeve (102) and are inclined downward, and one end of each of the thin reinforcing rods (20) away from the sleeve (102) is fixedly connected to the bottom plate (101), and one end of each of the thick reinforcing rods (21) away from the sleeve (102) is connected to a corresponding support plate (19).

8. A protective support device for thin-layer coal mine mining according to claim 1, characterized in that: The bottom plate (101) is provided with a plurality of storage slots (22).

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