A mine single prop column shoe

Abstract

The utility model discloses a kind of mining single prop column shoes, it is related to column shoe technical field, the utility model includes column shoe main part, inner support cylinder is connected in column shoe main part inside, inner support cylinder is sleeved with inner hoop ring outside, column shoe main part is sleeved with outer support cylinder outside, and outer support cylinder is sleeved with outer hoop ring outside, pull rod is connected between outer support cylinder and inner support cylinder. The utility model is provided with inner support cylinder, pull rod and outer support cylinder, inner support cylinder provides support from column shoe main part inside, outer support cylinder is constrained from outside, pull rod connects both and bears tension and strengthens column shoe main part, forms the anti-deformation structure of pull rod and outer support cylinder inside and outside cooperation, significantly improve the structural stability and carrying capacity of column shoe, reduce the security risk caused by radial creep;At the same time, when column shoe main part occurs axial creep, outer support cylinder is good in structural stability and can be used as reference object for metal material;Radial creep of column shoe main part can be effectively inhibited, and axial creep condition is convenient for determining.

Description

Technical Field

[0001] This utility model relates to the field of pillar shoe technology, specifically a single-piece support pillar shoe for mining. Background Technology

[0002] Mining single-pillar supports are key equipment used for temporary roof support in mining operations. Their main function is to support the roof of roadways or working faces, preventing roof collapse and ensuring the safety of underground working spaces. They typically consist of a cylinder, piston, and base, and the support height can be flexibly adjusted according to roof pressure. Widely used in tunneling and longwall mining faces in underground mines such as coal mines, they are indispensable support equipment for safe mine production.

[0003] A column shoe is an important component at the bottom of a single-span mine column, installed between the column base and the ground. Its core function is to increase the load-bearing area of ​​the column against the ground, distribute the load, and prevent the column from sinking into soft underground floor materials (such as coal seams, rock strata, or loose coal) due to excessive pressure, thus ensuring the stability of the column. Common column shoes are typically made of materials such as metal, plastic, and nylon.

[0004] In the mining environment, nylon column shoes, as key support components, are susceptible to continuous underground loads, complex geological conditions, and environmental factors during long-term use, resulting in significant radial creep. Under pressure, the radial dimensions of the nylon column shoes gradually undergo irreversible deformation. This creep not only leads to a decrease in the structural strength of the column shoes and a weakening of support stability, but may also cause individual supports to lose their effective support foundation, leading to serious safety hazards such as support tilting or even roof support failure. Traditional detection methods require measuring changes in the diameter of the column shoes to determine the degree of radial creep, which necessitates the use of tools and makes it difficult to quickly and intuitively identify safety risks. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a single support column shoe for mining, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a single support column shoe for mining, comprising a column shoe body, an inner support cylinder connected inside the column shoe body, an inner hoop sleeved outside the inner support cylinder, an outer support cylinder sleeved outside the column shoe body, and an outer hoop sleeved outside the outer support cylinder, a tie rod connecting the outer support cylinder and the inner support cylinder, and a ground spike fixed at the bottom of the outer support cylinder.

[0007] By adopting the above technical solution, the inner support cylinder forms support from inside the column shoe body, the outer support cylinder forms constraint from the outside, and the tie rod connects the two to form a synergistic force-bearing structure, which can effectively suppress the radial creep of the column shoe body. The ground spike can enhance the bonding stability between the column shoe and the ground. At the same time, it works with metal parts to realize static electricity release. Multiple components work together to improve the safety and reliability of the column shoe.

[0008] Furthermore, the inner support cylinder and the outer support cylinder are both provided with grooves at the top and bottom, and the outer ring of the pull rod is connected to the grooves.

[0009] By adopting the above technical solution, the groove provides precise installation positioning for the tie rod, ensuring a tight and stable connection between the tie rod and the inner and outer support cylinders, preventing the tie rod from shifting under stress, ensuring the effectiveness of tensile force transmission, and thus enhancing the overall structure's resistance to deformation.

[0010] Furthermore, the longitudinal section of the tie rod is H-shaped, and the inner support cylinder, inner hoop, tie rod, outer support cylinder, outer hoop, and ground spike are all made of 304 or 316L stainless steel.

[0011] By adopting the above technical solution, the H-shaped structure enables the two ends of the tie rod to match and engage with the grooves of the inner and outer support cylinders, thereby improving the connection strength; the 304 or 316L stainless steel material has high strength, corrosion resistance and good conductivity, which not only meets the structural strength requirements of the harsh environment of the mine, but also forms an efficient electrostatic conduction channel.

[0012] Furthermore, the pull rods are provided in multiple groups, and are divided into two groups in total, with the multiple pull rods in each group arranged in a circular array.

[0013] By adopting the above technical solution, the multiple sets of ring-shaped arrayed tie rods can evenly distribute the tension between the inner and outer support cylinders to all directions of the column shoe body, avoiding structural deformation caused by excessive local stress, and comprehensively enhancing the radial constraint effect on the column shoe body.

[0014] Furthermore, there are two inner hoop rings and two outer hoop rings, with the two inner hoop rings respectively fitted onto both ends of the inner support cylinder and the two outer hoop rings respectively fitted onto both ends of the outer support cylinder.

[0015] By adopting the above technical solution, the hoop rings at both ends can reinforce the ends of the inner and outer support cylinders respectively, while preventing the tie rod from falling off along the axial direction, ensuring the long-term stability of the connection between the tie rod and the support cylinder.

[0016] Furthermore, the outer support cylinder has an "L" shaped cross-section, and the ground spikes are conical.

[0017] By adopting the above technical solution, the L-shaped cross section enables the outer support cylinder to form radial constraints on the side of the column shoe body, and also provides a stable installation foundation for the ground spike through the bottom extension; the conical ground spike is easy to penetrate into the underground ground, improves the biting force between the column shoe and the ground, and enhances the anti-slip capability.

[0018] Furthermore, multiple spikes are provided, and the multiple spikes are distributed in a ring array.

[0019] By adopting the above technical solution, the multiple ground spikes distributed in a ring array can evenly disperse the pressure of the pillar shoe on the ground, preventing a single ground spike from being subjected to excessive force and sinking too deeply into the ground. At the same time, it enhances the pillar shoe's resistance to displacement in all directions and improves the overall support stability.

[0020] Furthermore, the top of the column shoe body is connected to a sleeve, and multiple ribs are distributed in a ring array on the outer ring of the sleeve. Connecting rings are passed through both sides of the top of the column shoe body. The column shoe body, ribs and sleeve are all made of MC nylon, which is reinforced with 30% glass fiber, modified with antistatic agent and flame retardant.

[0021] By adopting the above technical solutions, the sleeve and the single support can be precisely connected, and the ribs can enhance the connection strength between the sleeve and the main body of the support shoe; the modified MC nylon material can ensure lightweight and impact resistance, while the structural strength can be improved by glass fiber reinforcement, and the modification of antistatic agent and flame retardant can meet the explosion-proof safety requirements of mines, forming a functional complement to the metal parts.

[0022] Furthermore, the inner hoop ring is fixedly connected to the inner support cylinder by welding, and the outer hoop ring is fixedly connected to the outer support cylinder by welding. The two ends of the tie rod are spot welded to the inner support cylinder and the outer support cylinder, respectively.

[0023] By adopting the above technical solutions, welding and spot welding processes ensure the connection strength between the hoop and the support cylinder, and between the tie rod and the support cylinder, avoiding loosening or separation under long-term stress, and ensuring the stability and durability of the entire creep-resistant structure.

[0024] Furthermore, an anti-detachment bracket is fixed to the bottom of the connecting ring, and the cross-section of the anti-detachment bracket is fishbone shaped.

[0025] By adopting the above technical solution, the fishbone-shaped anti-detachment frame can increase the contact area and friction between the connecting ring and the main body of the column shoe, preventing the connecting ring from falling off the main body of the column shoe when subjected to force or vibration, and ensuring the stability of the chain connection.

[0026] In summary, the present invention has the following main advantages:

[0027] 1. This utility model, through the arrangement of an inner support cylinder, a tie rod, and an outer support cylinder, provides support from within the column shoe body, while the outer support cylinder provides external constraint. The tie rod connects the two, bears the tensile force, and strengthens the column shoe body, forming a deformation-resistant structure with the tie rod and outer support cylinder working together internally and externally. This significantly improves the structural stability and load-bearing capacity of the column shoe and reduces safety hazards caused by radial creep. Simultaneously, when axial creep occurs in the column shoe body, the outer support cylinder, being made of metal with good structural stability, can serve as a reference. Workers can directly visually observe the height difference between the outer support cylinder and the column shoe body to determine the degree of creep, which is more convenient and efficient than traditional measurement methods, facilitating timely detection and replacement of problems. It effectively suppresses radial creep in the column shoe body and facilitates the determination of axial creep conditions.

[0028] 2. This utility model, through the setting of inner and outer hoop rings, with two inner hoop rings respectively fitted onto both ends of the inner support cylinder and two outer hoop rings respectively fitted onto both ends of the outer support cylinder, serves a reinforcing function, preventing deformation of the inner and outer support cylinders themselves; at the same time, it can effectively prevent the tie rod from falling off along the axial direction of the inner and outer support cylinders, ensuring the stability of the tie rod connection, ensuring the continuous and effective transmission of tensile force between the inner and outer support cylinders, thereby maintaining the reliability of the entire anti-creep structure; further enhancing the structural strength of the inner and outer support cylinders;

[0029] 3. This utility model, through the setting of the ground spike, on the one hand, the conical ground spike penetrates into the underground ground, which can increase the friction between the pillar shoe and the ground, improve the pillar shoe's resistance to radial displacement, prevent the pillar shoe from sliding under force, and enhance the overall stability of the support; on the other hand, the pillar shoe body is made of antistatic modified MC nylon, with an antistatic agent static discharge channel. The ground spike, together with the inner support cylinder, tie rod, outer support cylinder and other metal components, forms a fast static discharge channel, which can discharge static electricity into the ground through the ground spike, effectively avoiding the safety risks caused by static electricity accumulation, and meeting the explosion-proof safety requirements of mines; thus improving the stability and safety of the pillar shoe. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 3 This is a schematic diagram of the tie rod structure of this utility model;

[0033] Figure 4 This is a schematic diagram of the outer support cylinder structure of this utility model;

[0034] Figure 5 This is a schematic diagram of the connecting ring structure of this utility model.

[0035] In the diagram: 1. Main body of the column shoe; 2. Rib; 3. Sleeve; 4. Connecting ring; 5. Anti-detachment frame; 6. Inner support cylinder; 7. Inner hoop ring; 8. Tie rod; 9. Outer support cylinder; 10. Outer hoop ring; 11. Ground spike. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of this utility model will be described below based on its overall structure.

[0038] Example 1:

[0039] A type of single-prop support shoe for mining, such as Figures 1-4 As shown, the device includes a column shoe body 1, an inner support cylinder 6 connected inside the column shoe body 1, an inner hoop ring 7 sleeved on the outside of the inner support cylinder 6, an outer support cylinder 9 sleeved on the outside of the column shoe body 1, and an outer hoop ring 10 sleeved on the outside of the outer support cylinder 9. Two inner hoop rings 7 and two outer hoop rings 10 are provided. The two inner hoop rings 7 are respectively sleeved on both ends of the inner support cylinder 6, and the two outer hoop rings 10 are respectively sleeved on both ends of the outer support cylinder 9. Multiple tie rods 8 are provided between the outer support cylinder 9 and the inner support cylinder 6. The system is divided into two groups, with multiple tie rods 8 arranged in a circular array within each group. Grooves are provided at the top and bottom of both the inner support cylinder 6 and the outer support cylinder 9. The outer ring of the tie rod 8 connects to these grooves. A ground spike 11 is fixed to the bottom of the outer support cylinder 9. The outer support cylinder 9 has an "L"-shaped cross-section, and the ground spike 11 is conical. Multiple ground spikes 11 are arranged in a circular array. The tie rod 8 has an "H"-shaped longitudinal cross-section. The system includes the inner support cylinder 6, inner hoop ring 7, tie rod 8, and outer support cylinder 9. The outer hoop 10 and the ground spikes 11 are both made of 304 or 316L stainless steel. During the support process, the inner support cylinder 6 located inside the column shoe body 1 provides support from the inside, while the outer support cylinder 9, which is fitted outside the column shoe body 1, forms a constraint from the outside. The two are connected by H-shaped tie rods 8. Multiple tie rods 8 are distributed in two groups of ring arrays to jointly bear the tension between the inner and outer support cylinders 9, forming an anti-deformation structure with internal and external cooperation, inhibiting radial creep of the column shoe body 1 and ensuring support stability. At the same time, multiple conical ground spikes 11 at the bottom of the outer support cylinder 9 can penetrate into the ground under the pressure of the single pillar, increasing the column shoe's resistance to radial displacement and reducing the occurrence of column shoe slippage. On the other hand, the ground spikes 11 form a conductive path with the inner support cylinder 6, tie rods 8, outer support cylinder 9 and hoop 11, which are made of 304 or 316L stainless steel. With the antistatic modification of the column shoe body 1 and other components, static electricity is conducted to the ground through the ground spikes 11, avoiding static electricity accumulation.

[0040] See Figure 1 and Figure 2 In the above embodiment, a sleeve 3 is connected to the top of the column shoe body 1. Multiple ribs 2 are distributed in a ring array on the outer ring of the sleeve 3. Connecting rings 4 penetrate both sides of the top of the column shoe body 1. The column shoe body 1, ribs 2 and sleeve 3 are all made of MC nylon. The MC nylon is reinforced with 30% glass fiber, modified with antistatic agent and flame retardant. The construction personnel install the column shoe body 1 between the base of the mine single support and the underground ground. The column shoe body 1, ribs 2 and sleeve 3 made of MC nylon material reinforced with 30% glass fiber, modified with antistatic agent and flame retardant, rely on the ribs 2 to enhance the structural strength, and cooperate with the single support through the sleeve 3. With the help of the connecting rings 4 for fixation, the initial bearing and distribution of the load of the single support is achieved, and the support is prevented from sinking into the base plate.

[0041] Example 2:

[0042] Based on the above embodiment one, in order to increase structural stability and reduce structural loosening, the following settings are now implemented.

[0043] See Figures 1-4 In the above embodiment, the inner hoop 7 is fixedly connected to the inner support cylinder 6 by welding, and the outer hoop 10 is fixedly connected to the outer support cylinder 9 by welding. The two ends of the pull rod 8 are spot-welded to the inner support cylinder 6 and the outer support cylinder 9 respectively. During production, grooves are opened at both ends of the outer support cylinder 9 and the inner support cylinder 6. Then, the workers put the pull rod 8 into the grooves and spot-weld the pull rod 8 to the outer support cylinder 9 and the inner support cylinder 6. Subsequently, the workers put the outer hoop 10 and the inner hoop 7 onto the outer rings of the outer support cylinder 9 and the inner support cylinder 6 respectively and weld them to fix them. This is to reinforce the inner support cylinder 6 and the outer support cylinder 9 and to prevent the pull rod 8 from loosening due to spot weld breakage. Finally, the workers put the anti-detachment frame 5, the inner support cylinder 6, the inner hoop 7, the pull rod 8, the outer support cylinder 9, the outer hoop 10, and the ground spike 11 into the mold. The column shoe body 1, the rib 2, and the sleeve 3 are formed in the outer support cylinder 9 through the plastic coating process of the metal insert.

[0044] Example 3:

[0045] Based on the above embodiment 1, in order to increase the stability of the connecting ring 4, the following settings are now implemented.

[0046] See Figure 5 In the above embodiment, an anti-slip bracket 5 is fixed at the bottom of the connecting ring 4. The anti-slip bracket 5 has a fishbone-shaped cross section. The fishbone-shaped anti-slip bracket 5 at the bottom of the connecting ring 4 strengthens the connection between the connecting ring 4 and the column shoe body 1, preventing the connecting ring 4 from falling off and affecting the overall fixing effect.

[0047] The implementation principle of this utility model is as follows: First, during production, grooves are opened at both ends of the outer support cylinder 9 and the inner support cylinder 6. Then, the workers put the pull rod 8 into the groove and spot weld the pull rod 8 to the outer support cylinder 9 and the inner support cylinder 6. Subsequently, the workers put the outer hoop ring 10 and the inner hoop ring 7 on the outer ring of the outer support cylinder 9 and the inner support cylinder 6 respectively and weld them to fix them. This is to reinforce the inner support cylinder 6 and the outer support cylinder 9 and to prevent the pull rod 8 from loosening due to spot weld breakage. Finally, the workers put the anti-detachment frame 5, the inner support cylinder 6, the inner hoop ring 7, the pull rod 8, the outer support cylinder 9, the outer hoop ring 10 and the ground spike 11 into the mold. Through the plastic coating process of the metal insert, the column shoe body 1, the rib 2 and the sleeve 3 are formed in the outer support cylinder 9.

[0048] After production is completed, the construction personnel install the column shoe body 1 between the base of the mining single support and the underground ground. The column shoe body 1, ribs 2 and sleeve 3 are made of MC nylon material that is reinforced with 30% glass fiber, antistatic and flame retardant modified. The ribs 2 enhance the structural strength, and the sleeve 3 cooperates with the single support. With the help of the connecting ring 4, the initial bearing and distribution of the load of the single support is achieved, and the support is prevented from sinking into the base plate.

[0049] During the support process, the inner support cylinder 6 located inside the column shoe body 1 provides support from the inside, and the outer support cylinder 9 sleeved outside the column shoe body 1 forms a constraint from the outside. The two are connected by H-shaped tie rods 8. Multiple tie rods 8 are distributed in two groups of ring arrays to jointly bear the tension between the inner and outer support cylinders 9, forming an anti-deformation structure with internal and external cooperation, inhibiting radial creep of the column shoe body 1, and ensuring support stability.

[0050] Meanwhile, the multiple conical ground spikes 11 at the bottom of the outer support cylinder 9 can penetrate the ground under the pressure of the single support column, which on the one hand increases the radial displacement resistance of the column shoe and reduces the occurrence of column shoe slippage; on the other hand, the ground spikes 11 form a conductive path with the inner support cylinder 6, tie rod 8, outer support cylinder 9 and hoop made of 304 or 316L stainless steel, and with the antistatic modification of the column shoe body 1 and other components, static electricity is conducted to the ground through the ground spikes 11 to avoid static electricity accumulation.

[0051] The fishbone-shaped anti-detachment bracket 5 at the bottom of the connecting ring 4 strengthens the connection between the connecting ring 4 and the column shoe body 1, preventing the connecting ring 4 from falling off and affecting the overall fixing effect. In long-term use, if the column shoe body 1 undergoes axial creep, since the inner and outer support cylinders 9 and the hoop are made of metal and have a stable structure, the degree of creep can be intuitively judged by observing the height difference between them and the column shoe body 1, so as to replace them in time and ensure support safety.

[0052] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A single support column shoe for mining, comprising a column shoe body (1), characterized in that: The inner support cylinder (6) is connected inside the main body (1) of the column shoe. An inner hoop ring (7) is sleeved on the outside of the inner support cylinder (6). An outer support cylinder (9) is sleeved on the outside of the main body (1), and an outer hoop ring (10) is sleeved on the outside of the outer support cylinder (9). A pull rod (8) is connected between the outer support cylinder (9) and the inner support cylinder (6). A ground spike (11) is fixed at the bottom of the outer support cylinder (9).

2. The single-prop shoe for mining as described in claim 1, characterized in that: The inner support cylinder (6) and the outer support cylinder (9) are provided with grooves at the top and bottom, and the outer ring of the pull rod (8) is connected to the groove.

3. The single-piece support column shoe for mining according to claim 2, characterized in that: The longitudinal section of the tie rod (8) is "H" shaped, and the inner support cylinder (6), inner hoop (7), tie rod (8), outer support cylinder (9), outer hoop (10) and ground spike (11) are all made of 304 or 316L stainless steel.

4. The single-prop shoe for mining as described in claim 3, characterized in that: The pull rod (8) is provided in multiple groups, and is divided into two groups. The multiple pull rods (8) in each group are distributed in a ring array.

5. The single-prop shoe for mining as described in claim 2, characterized in that: Two inner hoop rings (7) and two outer hoop rings (10) are provided, with the two inner hoop rings (7) respectively fitted onto the two ends of the inner support cylinder (6) and the two outer hoop rings (10) respectively fitted onto the two ends of the outer support cylinder (9).

6. The single-piece support column shoe for mining according to claim 5, characterized in that: The outer support cylinder (9) has an "L" shaped cross section, and the ground spikes (11) are conical.

7. The single-prop shoe for mining as described in claim 6, characterized in that: The ground spikes (11) are provided in multiples, and the multiple ground spikes (11) are distributed in a ring array.

8. The single-piece support column shoe for mining according to claim 1, characterized in that: The top of the main body (1) of the column shoe is connected to a sleeve (3), and multiple ribs (2) are distributed in an annular array on the outer ring of the sleeve (3). Connecting rings (4) pass through both sides of the top of the main body (1). The main body (1), ribs (2) and sleeve (3) are all made of MC nylon, which is reinforced with 30% glass fiber, modified with antistatic agent and flame retardant.

9. The single-prop shoe for mining as described in claim 1, characterized in that: The inner hoop (7) is fixedly connected to the inner support cylinder (6) by welding, and the outer hoop (10) is fixedly connected to the outer support cylinder (9) by welding. The two ends of the pull rod (8) are spot welded to the inner support cylinder (6) and the outer support cylinder (9) respectively.

10. The single-piece support column shoe for mining according to claim 8, characterized in that: The bottom of the connecting ring (4) is fixed with an anti-detachment bracket (5), and the cross-section of the anti-detachment bracket (5) is fishbone shaped.

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