An anti-tipping device and operation method beneficial to the safe withdrawal of advanced single props

Abstract

An anti-tipping device and operation method beneficial to the safe withdrawal of advanced single props provided by the present invention include single props, upper clamps, hydraulic support frames, rotation angle positioners, telescopic rods, lower clamps, and support corner bases; the upper and lower clamps include screws, nuts, and bayonets; the hydraulic support frame includes a free column, a sleeve, a universal ball head, and an injection hole; the rotation angle positioner includes a pin, an external fixing plate, a shaft rod, a connecting rod, and a gear; the support corner base includes a support base, a hoop groove, and a fastening strip; the upper and lower clamps respectively fix the single prop, and a rotation angle positioner is connected to the periphery thereof. The hydraulic support frame is connected to the upper clamp through the rotation angle positioner, and its bottom is connected to the universal ball head and embedded in the hoop groove connected to the support base; the telescopic rod is respectively connected to the lower clamp and the hydraulic support frame through the rotation angle positioner; the present invention can ensure that the single prop does not tilt during withdrawal, greatly eliminating potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of mine safety, and particularly relates to an anti-tipping device and an operation method beneficial to the safe withdrawal of advanced single props. Background Art

[0002] During the coal seam mining in the coal mine underground, when the fully-mechanized longwall mining technology is adopted, due to the influence of the mining face mining on the two roadways, problems such as abnormal roof extrusion and severe mine pressure manifestation may occur, and even roof weighting may cause the hydraulic single props for the advanced support of the two roadways to be affected by the roof collapse, resulting in the tipping-type roof fall accident of the single hydraulic prop. Therefore, the safe and stable support of reasonable single props is particularly important.

[0003] As the working face advances, the support position of the single prop also needs to be changed accordingly. When moving and withdrawing the single prop, the single prop under the roof pressure will be greatly squeezed and thus inclined, bringing huge safety hazards to the underground workers. At the same time, after the single hydraulic prop is depressurized, relying solely on manpower to tilt and carry it also brings great safety hazards to the underground workers.

[0004] For the existing invention with the patent number CN202022956264.8, its clamp connection structure for two single props prevents the instability of a single prop when the mine pressure comes. Through the setting of the connection device, it solves the hidden dangers existing in the support of the single prop in the roadway to a certain extent. However, during the process of depressurizing, withdrawing and moving the single prop, the problem of the stability of the single prop is not involved. At this time, the connection device is a double-edged sword. If the instability of a single prop cannot be relieved in time, it may affect more single props, causing huge safety hazards. At the same time, when withdrawing the single prop, it is inevitable to tilt it manually, which brings trouble and safety hazards to the workers.

[0005] For the existing invention with the patent number CN202122930811.X, its designed anti-tipping auxiliary device for a single hydraulic prop senses and transmits to the alarm through the design of the tilt detector, giving an early warning of danger to the underground workers. Its stability depends on the circular chassis at the bottom to a certain extent. Since the chassis is closed, the device needs to be lifted manually by the workers when in use. However, the technology provided by the present invention can ensure that the single prop is in a vertical state and only affected by the up and down pressure and the supporting force. The design of its bottom gets rid of the large-area base stability thinking and adopts the thinking of three points determining a plane. Only three supporting bases are used to ensure stability. Compared with the above patent, it is more convenient for the workers to move in the complex underground working environment. Moreover, this patent does not design the withdrawal technology of the single prop, which is extremely likely to cause safety hazards during the withdrawal stage of the single prop. The present invention provides the safe tilt withdrawal technology of the single prop.

[0006] Therefore, a new technology is needed to ensure that the single prop does not tilt during the pressure relief process, causing potential safety hazards, and to ensure the safe and effective withdrawal of the single prop after pressure relief, so as to ensure the safety of underground workers and the convenience of workers' operations. Summary of the Invention

[0007] Aiming at the deficiencies mentioned in the above technical background, the purpose of the present invention is to provide an anti-tipping device and an operation method beneficial to the safe withdrawal of the advanced single prop.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] An anti-tipping device beneficial to the safe withdrawal of the advanced single prop, including a single prop, an upper clamp, a hydraulic support frame, a rotation angle locator, a telescopic rod, a lower clamp, and a support corner base. It is characterized in that the single prop is fixed by the upper clamp and the lower clamp, the rotation angle locator is connected to the periphery of the upper clamp and the lower clamp, the hydraulic support frame is connected to the upper clamp through the rotation angle locator, and its bottom is connected with a universal ball head, which is embedded in the hoop groove connected with the support base. The telescopic rod is connected to the hydraulic support frame and the lower clamp respectively through the rotation angle locator.

[0010] Preferably, the upper clamp and the lower clamp have the same clamp structure, including a nut, a screw, and a bayonet. Among them, six bayonets are arranged around the entire clamp at a 60-degree angle, and each bayonet is provided with a nut and a screw.

[0011] Preferably, the rotation angle locator includes a pin, a shaft rod, a connecting rod, and a gear. Three rotation angle locators are evenly distributed and connected around the upper and lower clamps respectively. The connecting lines between them and the centers of the upper and lower clamps are at a 120-degree angle to each other; among them, the external fixing plate is fixedly connected to the periphery of the upper and lower clamps, the pin is arranged at the external fixing plate, the shaft rod is connected to the gear, passes through the external fixing plate and is connected to the connecting rod, and through the connection of the connecting rod and the free column, the rotation angle locator is connected to the hydraulic support frame.

[0012] Preferably, the telescopic rod is connected to the lower clamp and the hydraulic support frame through the rotation angle locator, and within a certain range, it can be telescoped and the angle can be changed.

[0013] Preferably, the hydraulic support frame includes a free column, a sleeve, and an injection hole; the universal ball head is connected to the lower end of the sleeve, and the upper end of the free column is connected to the connecting rod.

[0014] Preferably, the support corner base includes a support base, a hoop groove, and a fastening strip; among them, the hoop groove is fixed on the support base, and a universal ball head is embedded inside it, and a fastening strip is arranged on the outer ring of the hoop groove.

[0015] Preferably, the operation method is as follows:

[0016] S1. Connect the hydraulic support frame with the upper clamp through the rotation angle locator, embed the universal ball head at the bottom of the hydraulic support frame into the hoop groove, and tighten the fastening strip.

[0017] S2. Connect the telescopic rod with the hydraulic support frame and the lower clamp through the rotation angle locator.

[0018] S3. Synchronously open the bayonets at the corresponding positions of the upper clamp and the lower clamp, put the single prop in and fix it.

[0019] S4. Adjust the hydraulic support frame to a suitable angle and retract the telescopic rod to a suitable angle so that the upper clamp and the lower clamp fix the single prop on a vertical straight line.

[0020] S5. Depressurize the single prop. After the depressurization is completed, select a suitable hydraulic support frame for depressurization so that the single prop slowly tilts in one direction. At the same time, control the angle and length of the telescopic rod under the corresponding hydraulic support frame to control the stability of the single prop.

[0021] S6. After the hydraulic support frame is depressurized and the telescopic rod is adjusted, open the corresponding bayonet for safe withdrawal.

[0022] The beneficial effects are as follows:

[0023] 1. The design of three hydraulic support frames ensures that there are only three support points at the bottom, so that only one plane can be determined. Thus, by adjusting the height of each single hydraulic support frame respectively, the horizontal stable state of the whole device can be guaranteed without shaking.

[0024] 2. The fixation of the upper and lower clamps can make the single prop in a vertical line, prevent it from tilting during the depressurization process and bring potential safety hazards to underground workers, and ensure its stability and safety.

[0025] 3. The combined design of the upper and lower clamps ensures that the single prop is only affected by the roof pressure and the floor support force. To a certain extent, the two forces are opposite in direction and can cancel each other out. And the single prop is only under pure pressure in this state and will not generate bending moment. This not only reduces the potential safety hazard of the single prop tilting, but also greatly increases the service life of the single prop.

[0026] 4. The height adjustment of a single hydraulic support frame in cooperation with the telescopic expansion and contraction of the corresponding telescopic rod can safely and effectively control the single prop to tilt in one direction.

[0027] 5. The clamp design with multiple bayonets provides multiple choices for the tilting direction of the single prop, ensures various selectivities under complex underground working conditions, and provides more safety and convenience for workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural view of the present invention;

[0029] Figure 2 is a schematic structural view of the present invention in an inclined state;

[0030] Figure 3 is a schematic structural view of the clamp of the present invention;

[0031] Figure 4 is a schematic structural view of the hydraulic support bracket of the present invention;

[0032] Figure 5 are a side view (a) and a perspective view (b) of the rotation angle locator of the present invention;

[0033] Figure 6 is a schematic structural view of the support corner base of the present invention;

[0034] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0035] Single prop, 2. Upper clamp, 2-1. Nut, 2-2. Screw, 2-3. Bayonet, 3. Hydraulic support frame, 3-1. Free column, 3-2. Sleeve, 3-3. Universal ball head, 3-4. Injection hole, 4. Rotation angle locator, 4-1. Pin, 4-2. External fixing plate, 4-3. Shaft rod, 4-4. Connecting rod, 4-5. Gear, 5. Telescopic rod, 6. Lower clamp, 7. Support corner base, 7-1. Support base, 7-2. Clamp groove, 7-3. Fastening strip. DETAILED DESCRIPTION OF THE INVENTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] An anti-tipping device and an operation method beneficial to the safe withdrawal of an advanced single prop, as Figure 1 、 4As shown in Figures 6, the present invention mainly includes a single prop 1, an upper clamp 2, a hydraulic support frame 3, a rotation angle positioner 4, a telescopic rod 5, a lower clamp 6, and a support corner base 7. The single prop 1 is fixed and clamped by the upper clamp 2 and the lower clamp 6. The rotation angle positioner 4 is connected to the periphery of the upper clamp 2 and the lower clamp 6. The hydraulic support frame 3 is connected to the upper clamp 2 through the rotation angle positioner 4. Its upper free column 3-1 is connected to the connecting rod 4-4, and its bottom is connected with a universal ball head 3-3, which is embedded in the hoop groove 7-2 connected with the support base 7-1. After the universal ball head 3-3 is embedded, the fastening strip 7-3 can be operated to fasten it. By injecting pressure through the injection hole 3-4, the free column 3-1 inside its sleeve 3-2 will be lifted under pressure. The telescopic rod 5 is connected to the hydraulic support frame 3 and the lower clamp 6 respectively through the rotation angle positioner 4.

[0038] After the single prop is depressurized, as Figure 2 shown, through the height adjustment of a single hydraulic support frame 3 and the cooperation of the telescopic movement of the telescopic rod 5, the safe and effective inclination of the single prop 1 in a certain direction is completed.

[0039] After the inclination of the single prop 1 is completed, the corresponding screw 2-2 and nut 2-1 can be operated to open the corresponding bayonet 2-3. As Figure 3 shown, it is always ensured that the opened bayonets are the two bayonets with a 90-degree angle to the corresponding inclination direction, ensuring that the single prop will not tilt and slide after the clamp is opened and thus hit the workers.

[0040] Figure 5 This is a schematic diagram of the rotation angle positioner of the present invention, which plays a role of connection and angle adjustment in the present invention. Through the connecting rod 4-4, the rotation angle positioner 4 is connected to the hydraulic support frame 3. At the same time, the connecting rod 4-4 is connected to the shaft rod 4-3 with a gear 4-5, which ensures that the hydraulic support frame 3 can adjust the inclination angle arbitrarily to a certain extent. When the appropriate angle is adjusted, the gear 4-5 is locked by operating the pin 4-1 placed on the external fixing plate 4-2, thereby ensuring the fixation of the angle and preventing the single prop from shaking during the support process.

[0041] The operation method is as follows:

[0042] S1. Connect the hydraulic support frame 3 to the upper clamp 2 through the rotation angle positioner 4. Embed the universal ball head 3-3 at the bottom of the hydraulic support frame 3 into the hoop groove 7-2 and tighten the fastening strip 7-3.

[0043] S2. Connect the telescopic rod 5 to the hydraulic support frame 3 and the lower clamp 6 through the rotation angle positioner 4.

[0044] S3. Synchronously open the bayonets 2-3 at the corresponding positions of the upper clamp 2 and the lower clamp 6, and fix the single prop 1 after putting it in.

[0045] S4. Adjust the hydraulic support frame 3 to an appropriate angle, and retract the telescopic rod 5 to an appropriate angle, so that the upper clamp 2 and the lower clamp 6 fix the single prop on a vertical straight line.

[0046] S5. Depressurize the single prop 1. After the depressurization is completed, select an appropriate hydraulic support frame 3 to depressurize, so that the single prop 1 slowly tilts in one direction. At the same time, control the angle and length of the telescopic rod 5 under the corresponding hydraulic support frame 3 to control the stability of the single prop.

[0047] S6. After the hydraulic support frame 3 is depressurized and the telescopic rod 5 is adjusted, open the corresponding bayonet 2-3 for safe withdrawal.

[0048] The working method is as follows:

[0049] Connect the hydraulic support frame 3 with the upper clamp 2 by rotating the angle locator 4. Inlay the universal ball head 3-3 at the bottom of the hydraulic support frame 3 into the hoop groove 7-2, and tighten the fastening strip 7-3 so that the universal ball head 3-3 does not fall off. To a certain extent, it can be rotated arbitrarily. At the same time, connect the telescopic rod 5 with the hydraulic support frame 3 and the lower clamp 6 by rotating the angle locator 4. Open the bayonet 2-3 at the corresponding positions of the upper clamp 2 and the lower clamp 6, put the single prop 1 in and fix it. Adjust the hydraulic support frame 3 to an appropriate angle, and retract the telescopic rod 5 to an appropriate angle, so that the upper clamp 2 and the lower clamp 6 fix the single prop on a vertical straight line. Depressurize the single prop 1. After the depressurization is completed, select an appropriate hydraulic support frame 3 to depressurize and adjust its height, so that the single prop 1 slowly tilts in one direction. At the same time, control the angle and length of the telescopic rod 5 under the corresponding hydraulic support frame 3 to control the stability of the single prop. After the hydraulic support frame 3 is completed, open the corresponding bayonet 2-3, and the worker takes out the single prop 1 for withdrawal and movement.

[0050] An anti-tipping device beneficial to the safe withdrawal of advanced single props designed by the present invention. The design of three hydraulic support frames ensures that there are only three support points at the bottom, thus only one plane can be determined. Therefore, by adjusting the height of each single hydraulic support frame respectively, the horizontal stable state of the whole device can be ensured without shaking. The fixation of the upper and lower clamps can make the single prop in a vertical line, prevent it from tilting during the pressure relief process, bringing potential safety hazards to underground workers, and ensure its stability and safety. At the same time, the combined design of the upper and lower clamps ensures that the single prop is only affected by the roof pressure and the floor support force. To a certain extent, the two forces are in opposite directions and can cancel each other out. Moreover, the single prop is only under pure pressure in this state and will not generate bending moment. This not only reduces the safety hazard of the single prop tilting, but also greatly increases the service life of the single prop. The height adjustment of a single hydraulic support frame in cooperation with the telescopic movement of the corresponding telescopic rod can safely and effectively control the single prop to tilt in one direction. The clamp design with multiple notches provides multiple choices for the tilting direction of the single prop, ensuring various selectivities under complex underground working conditions and providing more safety and convenience for workers.

[0051] In the description of this specification, reference terms such as "one embodiment", "example", "specific example"

[0052] etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An anti-tipping device beneficial to the safe withdrawal of an advanced single hydraulic prop, comprising a single hydraulic prop (1), an upper clamp (2), a hydraulic support frame (3), a rotation angle positioner (4), a telescopic rod (5), a lower clamp (6), and a support corner base (7), characterized in that, The said supporting corner base (7) includes a supporting base (7-1), a hoop groove (7-2), and a fastening strip (7-3). Among them, the hoop groove (7-2) is fixed on the supporting base (7-1). A universal ball head (3-3) is embedded inside the hoop groove (7-2). A fastening strip (7-3) is provided on the outer ring of the hoop groove (7-2). The single prop (1) is fixed by an upper clamp (2) and a lower clamp (6). The rotation angle locator (4) is connected to the peripheries of the upper clamp (2) and the lower clamp (6). The hydraulic support frame (3) is connected to the upper clamp (2) through the rotation angle locator (4). A universal ball head (3-3) is connected to the bottom of the hydraulic support frame (3). The telescopic rod (5) is connected to the hydraulic support frame (3) and the lower clamp (6) respectively through the rotation angle locator (4); The said upper clamp (2) and lower clamp (6) have the same clamp structure, including a nut (2-1), a screw (2-2), and a bayonet (2-3). Among them, six bayonets (2-3) are provided at a 60-degree angle around the entire clamp. A nut (2-1) and a screw (2-2) are provided on each bayonet (2-3); The said rotation angle locator (4) includes a pin (4-1), a shaft rod (4-3), a connecting rod (4-4), and a gear (4-5). Three rotation angle locators (4) are evenly distributed and connected around the upper and lower clamps respectively. The connecting lines between the rotation angle locators (4) on the upper clamp (2) and the center of the upper clamp (2) form a 120-degree angle pairwise. The connecting lines between the rotation angle locators (4) on the lower clamp (6) and the center of the lower clamp (6) form a 120-degree angle pairwise. An external fixing plate (4-2) is fixedly connected to the peripheries of the upper and lower clamps. The pin (4-1) is arranged at the external fixing plate (4-2). The shaft rod (4-3) is connected to the gear (4-5). The shaft rod (4-3) passes through the external fixing plate (4-2) and is connected to the connecting rod (4-4), and is connected to the free column (3-1) through the connecting rod (4-4) to connect the rotation angle locator (4) with the hydraulic support frame (3).

2. The anti-tipping device beneficial to the safe withdrawal of the advanced single hydraulic prop according to claim 1, wherein The said hydraulic support frame (3) includes a free column (3-1), a sleeve (3-2), and an injection hole (3-4). The said universal ball head (3-3) is connected to the lower end of the sleeve (3-2). The upper end of the free column (3-1) is connected to the connecting rod (4-4).

3. The operation method of an anti-tipping device beneficial to the safe withdrawal of an advanced single prop according to any one of claims 1-2, characterized in that: S1. Connect the hydraulic support frame (3) with the upper clamp (2) through the rotation angle locator (4). Embed the universal ball head (3-3) at the bottom of the hydraulic support frame (3) into the hoop groove (7-2), and tighten the fastening strip (7-3); S2. Connect the telescopic rod (5) with the hydraulic support frame (3) and the lower clamp (6) through the rotation angle locator (4); S3. Synchronously open the bayonets (2-3) at the corresponding positions of the upper clamp (2) and the lower clamp (6), put the single prop (1) in and then fix it; S4. Adjust the hydraulic support frame (3) to an appropriate angle and retract the telescopic rod (5) to an appropriate angle so that the upper clamp (2) and the lower clamp (6) fix the single prop on a vertical straight line. S5. Depressurize the single prop (1). After the depressurization is completed, select an appropriate hydraulic support frame (3) for depressurization to make the single prop (1) slowly tilt in one direction. At the same time, control the angle and length of the telescopic rod (5) under the corresponding hydraulic support frame (3) to control the stability of the single prop. S6. After the hydraulic support frame (3) is depressurized and the telescopic rod (5) is adjusted, open the corresponding bayonet (2-3) for safe withdrawal. After the single prop (1) is tilted, the corresponding screw (2-2) and nut (2-1) can be operated to open the corresponding bayonet (2-3), always ensuring that the opened bayonets are the two bayonets with a 90-degree angle in the corresponding tilting direction to ensure that the single prop will not tilt and slide after the clamp is opened.

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