Integrally cast hydraulic support base

Abstract

The invention relates to the technical field of hydraulic support bases, and discloses an integral casting type hydraulic support base, the base is processed by a 3D printing sand mold integral casting process to form an integral structure without a welding seam at the upper part, and compared with a traditional combined welding type base structure, the integral casting type hydraulic support base has better stress-resistant structure stability; the maintenance frequency and cost caused by welding seam cracking and the like can be reduced, accurate calculation and optimal design are conducted on the base structure, stress concentration points are reduced, the overall strength and stability are improved, box type reinforcing structures are adopted at the bridge crossing base and the front pedal of the support base body, targeted reinforcement of an upper force bearing structure of the support base body is achieved, and the service life of the support base body is prolonged. A large inclined surface and cambered surface structure is arranged at the mounting stress position of the connecting rod and the key supporting rod of the support seat body, the inclined surface and cambered surface structure is arranged on the stress coaxial side of the supporting rod, stress concentration can be reduced, stable temporary support can be provided for the supporting rod when the connecting rod is disengaged, and the structural bearing strength and the working reliability of the base are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic support bases, and specifically to an integrally cast hydraulic support base. Background Art

[0002] Currently, with the mechanized development of the coal industry, more and more intelligent devices have entered actual coal mining. At the same time, as an important device for coal mining, in underground mining operations such as coal mines and metal mines, the hydraulic support is a key device for supporting the roof. The base bears the bending and torsional moments caused by the uneven pressure and load of the coal seam in practice. As a key support structure, the hydraulic support is an important guarantee for safe and efficient coal mining. The strength and stability of its base are directly related to the safety production and operation efficiency of the mine. Therefore, the requirements for the structural design of the base are getting higher and higher.

[0003] In terms of structure, traditional hydraulic support bases mostly adopt a welding and assembly method. Their materials are mainly Q690D, ZG27SiMn, ZG270 - 500, and ASTM A148 115 - 95. For the structure of the hydraulic support base, only the column socket is cast, and the components are connected by welding. Due to the inconsistent materials of the welded structural parts, the overall strength is inconsistent and it is easy to deform. Moreover, the welded structure has problems such as stress concentration, structural deformation, and weld cracking, including problems such as easy weld cracking, insufficient overall rigidity, and high maintenance costs. Especially in areas with complex geological conditions and stress concentration, these problems are particularly prominent. Therefore, an integrally cast hydraulic support base is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrally cast hydraulic support base to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An integrally cast hydraulic support base, including a support seat body, the support seat body is provided with an integrally cast structure, a front pedal is provided at the front of the support seat body, a first box structure is provided inside the front pedal, a bridge seat is provided in the middle of the support seat body, a second box structure is provided inside the bridge seat, and reinforcing ribs are provided inside both the first box structure and the second box structure;

[0006] A column socket groove is provided at the upper support docking part of the support seat body, a protective inclined surface is provided on the side of the column socket groove, a first mounting hole and a second mounting hole are provided at the rear of the support seat body, and a first arc surface and a second arc surface are respectively provided on the docking and mounting sides of the first mounting hole and the second mounting hole.

[0007] Preferably, the front pedals are provided in pairs, and the two sets of front pedals are symmetrically and integrally fixed on both sides of the front part of the bracket seat body. The front pedals are arranged with a narrower front and a wider rear. The upper joint of the front pedals is provided with a transition arc surface, and the upper part of the front pedals is evenly provided with anti-slip convex lines.

[0008] Preferably, the first box body structure is in the shape of a box cavity, and the first box body structure is arranged in the middle of the inner side of the front pedal.

[0009] Preferably, the bridge seat is arranged in the middle of the bracket seat body. The second box body structure is in the shape of a box cavity, and the second box body structure is arranged in the middle of the inner side of the bridge seat.

[0010] Preferably, the reinforcing ribs are fixedly arranged at the middle hollow stress-bearing parts of the first box body structure and the second box body structure.

[0011] Preferably, a single set of the above-mentioned reinforcing ribs is provided in pairs, the distance between the two reinforcing ribs is 8-25 mm, and the thickness of the reinforcing ribs is 5-12 mm.

[0012] Preferably, the socket grooves are in the structure of paired hemispherical grooves, and the two sets of socket grooves are located at the cylinder installation part of the upper part of the bracket seat body.

[0013] Preferably, the inner side of the socket groove is smooth, the front side of the socket groove is provided with an arc-shaped transition notch, the protective inclined surface is arranged on the opposite side of the transition notch, the inclination angle of the protective inclined surface is 125-135 degrees, and the inclined surface side of the protective inclined surface is smooth.

[0014] Preferably, the first mounting hole and the second mounting hole are distributed in a vertical stepped shape, the first mounting hole and the second mounting hole sequentially penetrate through the rear part of the bracket seat body, and both sides of the openings of the first mounting hole and the second mounting hole are thickened.

[0015] Preferably, bearing platforms are arranged at the openings of the first mounting hole and the second mounting hole. The first arc surface and the second arc surface are respectively arranged at the side transitions of the two bearing platforms. The first arc surface and the second arc surface are both located on the stress-facing side of the support rod, and the arc surface sides of the first arc surface and the second arc surface are smooth.

[0016] Compared with the prior art, the present invention adopts the above technical solutions and has the following technical effects:

[0017] 1. The base is in the form of integral casting and is processed by the 3D printing sand mold integrated casting process. The support seat body is integrally formed without a weld structure on the upper part. Compared with the traditional combined welded base structure, it has better anti-stress structural stability, and can reduce the maintenance frequency and cost caused by weld cracking, etc. The support seat body is made of a unique TNZ material, with an overall tensile strength ≥1300 MPa and an overall hardness ≥42 HRC, effectively improving the overall rigidity and bearing capacity of the base and extending its service life.

[0018] 2. Optimize the structural design. Through the finite element analysis method, accurately calculate and optimize the design of the base structure to ensure that the stress can be evenly distributed during loading, reduce stress concentration points, improve the overall strength and stability, and adopt a box-type reinforcement structure at the overbridge seat and the front pedal of the support seat body, and thicken the key stress-bearing parts to enhance the adaptability of the base under different geological conditions and achieve targeted strengthening of the upper load-bearing structure of the support seat body.

[0019] 3. Set a large inclined surface and arc surface structure at the installation and stress-bearing parts of the connecting rod and the key supporting rod of the support seat body. The inclined surface and arc surface structure are set on the coaxial side of the stress of the supporting rod, which can reduce stress concentration and provide a stable temporary support when the connecting rod comes out, effectively improving the structural load-bearing strength and working reliability of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall upper three-dimensional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the overall upper planar structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the middle cross-sectional structure of the support seat body of the present invention.

[0025] Description of the reference numerals: 1. Support seat body; 2. Overbridge seat; 3. Front pedal; 4. Column socket groove; 5. Protective inclined surface; 6. First mounting hole; 7. First arc surface; 8. Second mounting hole; 9. Second arc surface; 10. First box structure; 11. Second box structure; 12. Reinforcing rib; 13. Anti-slip convex pattern. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 work shall fall within the scope of protection of the present invention.

[0027] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope that can be covered by the technical content disclosed in this application without affecting the effects that this application can produce and the purposes that can be achieved.

[0028] Embodiment

[0029] Please refer to Figures 1-4 , the present invention provides a technical solution: an integrally cast hydraulic support base, including a support seat body 1. The support seat body 1 is integrally cast and processed by a 3D printing sand mold integrated casting process, keeping the casting error within ±1mm. All parts of the base are cast integrally, with no weld structure on the upper part. Compared with the traditional combined welded base structure, it has better anti-stress structural stability, and can reduce the maintenance frequency and cost caused by weld cracking, etc. In terms of material, the support seat body 1 uses a unique TNZ material, with an overall tensile strength ≥1300MPa and an overall hardness ≥42HRC, effectively improving the overall rigidity and bearing capacity of the base and extending its service life. The base structure has a high degree of freedom and can be designed with different structures according to the different needs of different customers to enhance the stability of the support and the purpose of blocking and discharging gangue.

[0030] As shown in the attached Figure 1 , a front pedal 3 is provided at the front of the support seat body 1. The front pedal 3 is used for the support of the soleplate when personnel pass through and has an anti-slip function. The front pedals 3 are arranged in pairs, and the two groups of front pedals 3 are symmetrically and integrally fixed on both sides of the front of the support seat body 1. In order to improve the load-bearing characteristics of the front pedal 3, the front pedal 3 is set with a narrower front and a wider rear. By increasing the structural thickness of the rear combined side of the front pedal 3, its structural support strength can be increased. In order to avoid stress concentration, the upper joint of the front pedal 3 is set as a transition arc surface. In order to increase the anti-slip friction of the front pedal 3, anti-slip convex lines 13 are evenly arranged on the upper part of the front pedal 3. The anti-slip convex lines 13 adopt a bean-shaped pattern structure, which can increase its anti-slip effect without affecting the strength of the front pedal 3.

[0031] As shown in the attached Figure 4 figure, in order to improve the structural strength of the front pedal 3, a first box structure 10 is arranged inside the front pedal 3. The first box structure 10 is in the shape of a box cavity and is arranged in the middle of the inner side of the front pedal 3. By setting the box-shaped structure, the overall mass of the base can be reduced and the structural stress-bearing strength in the middle of the front pedal 3 can be improved.

[0032] As shown in the attached Figure 1 figure, a bridge seat 2 is arranged in the middle of the support seat body 1. The bridge seat 2 is used for the separated connection and installation of the left and right side components. The bridge seat 2 is arranged in the middle of the support seat body 1. In order to improve the structural stress-bearing strength of the bridge seat 2, a second box structure 11 is arranged inside the bridge seat 2. The second box structure 11 is in the shape of a box cavity and is arranged in the middle of the inner side of the bridge seat 2. By setting the box-shaped structure, the overall mass of the base can be reduced and the structural stress-bearing strength in the middle of the bridge seat 2 can be improved. Through finite element analysis method, the base structure is accurately calculated and optimized to ensure that the stress can be evenly distributed during loading, reduce stress concentration points, improve the overall strength and stability, and a box-shaped reinforcement structure is adopted at the bridge seat 2 of the support seat body 1 and the front pedal 3 to enhance the adaptability of the base under different geological conditions and achieve targeted strengthening of the upper load-bearing structure of the support seat body 1.

[0033] In order to further improve the structural strength of the device, reinforcing ribs 12 are arranged inside both the first box structure 10 and the second box structure 11. As shown in the attached Figure 4 figure, the reinforcing ribs 12 are fixedly arranged at the middle hollow stress-bearing parts of the first box structure 10 and the second box structure 11, and an integrated stress-bearing structure can be formed at the stress-bearing parts in the cavity to enhance the overall structural strength of the first box structure 10 and the second box structure 11. In order to increase the stress stability, a single group of reinforcing ribs 12 is arranged in pairs, the distance between the two reinforcing ribs 12 is 8 mm, and the thickness of the reinforcing ribs 12 is 6 mm. Through the stress-bearing structure composed of double groups of reinforcing ribs 12, even if one-sided reinforcing ribs 12 are broken, the box structure can still ensure sufficient stress support.

[0034] In order to improve the working reliability of the base, as shown in the attached Figure 2 figure, socket grooves 4 are arranged at the upper support docking part of the support seat body 1. The socket grooves 4 are hemispherical groove structures arranged in pairs, and the two groups of socket grooves 4 are located at the cylinder installation part on the upper part of the support seat body 1, which is the main stress-bearing support part of the base. As shown in the attached Figure 4As shown, the inner side of the column socket groove 4 is smooth and has a low contact friction. In order to facilitate the fitting guidance, an arc-shaped transition notch is provided on the front side of the column socket groove 4. In order to facilitate the ejection guidance of the stressed cylinder body, a protective slope 5 is provided on the side of the column socket groove 4. The protective slope 5 is arranged on the opposite side of the transition notch. When the stressed cylinder body fails to escape in an emergency, the protective slope 5 can be used to slide and support the lower part of the escaped cylinder body, and the column socket groove 4 can be used to temporarily and firmly support the lower part of the escaped cylinder body. In order to reduce the contact impact force, the protective slope 5 is a large slope and its slope side is a smooth surface. Specifically, the inclination angle of the protective slope 5 is 130 degrees, which can effectively remove the ejection impact force.

[0035] In order to facilitate the connection and installation of the force-bearing support rod, a first mounting hole 6 and a second mounting hole 8 are provided at the rear of the bracket base body 1. Figure 1 As shown, the first mounting hole 6 and the second mounting hole 8 are distributed in an up-and-down stepped manner, and the first mounting hole 6 and the second mounting hole 8 sequentially penetrate the rear portion of the bracket seat body 1, and are respectively used for connecting and installing two sets of support rods. In order to improve the structural force strength of the first mounting hole 6 and the second mounting hole 8, both sides of the openings of the first mounting hole 6 and the second mounting hole 8 are thickened. In order to improve the support work reliability at the first mounting hole 6 and the second mounting hole 8, a first arc surface 7 and a second arc surface 9 are respectively provided on the butt mounting sides of the first mounting hole 6 and the second mounting hole 8, as shown in the attached Figure 4 As shown, the openings of the first mounting hole 6 and the second mounting hole 8 are both provided with load-bearing surfaces, and the first curved surface 7 and the second curved surface 9 are respectively arranged on the edge transition sides of the two groups of load-bearing surfaces. In order to reduce the surface friction, the curved surface sides of the first curved surface 7 and the second curved surface 9 are both smooth surfaces. The first curved surface 7 and the second curved surface 9 are both located on the force-bearing side of the support rod, which can be used as a temporary supporting structure after the support rod protrudes. The inclined surface and the curved surface structure are arranged on the force-bearing coaxial side of the support rod, which can reduce stress concentration and provide a stable guide and temporary support for the connecting rod when it comes out of the situation, effectively improving the structural bearing strength and working reliability of the base.

[0036] Working principle or structural principle. When in use, the support base body 1 is installed at the lower support installation of the hydraulic support to complete the connection and installation of the hydraulic cylinder and the support connecting rod. During operation, the support base body 1 bears the working pushing and pressing forces transmitted by the hydraulic cylinder and the support connecting rod. The support base body 1 is processed by the 3D printing sand mold integrated casting process using TNZ material, with an integrally formed upper part without weld seams. Compared with the traditional combined welded base structure, it has better stress-resistant structural stability. And a large inclined surface and arc surface structure are set at the installation and force-bearing positions of the connecting rod and the key support rod of the support base body 1. The inclined surface and arc surface structure are set on the coaxial side of the force-bearing of the support rod, which can reduce stress concentration and reduce the maintenance frequency and cost caused by weld cracking, etc. In case of emergency when the hydraulic cylinder and the support connecting rod are disengaged, it can provide a stable temporary support for them to avoid the detachment of the force-bearing structure, effectively improving the structural bearing strength and working reliability of the base.

[0037] In summary, the base adopts the form of integral casting and is processed by the 3D printing sand mold integrated casting process. The support base body 1 is integrally formed with an upper part without weld seams. Compared with the traditional combined welded base structure, it has better stress-resistant structural stability and can reduce the maintenance frequency and cost caused by weld cracking, etc. The support base body 1 uses a special TNZ material, with an overall tensile strength ≥ 1300 MPa and an overall hardness ≥ 42 HRC, effectively improving the overall rigidity and bearing capacity of the base, extending its service life. The structural design is optimized. Through the finite element analysis method, the base structure is accurately calculated and optimized to ensure that the stress can be evenly distributed during loading, reduce stress concentration points, improve the overall strength and stability, and a box-type reinforcement structure is adopted at the overbridge seat 2 and the front pedal 3 of the support base body 1, and the key stress-bearing parts are thickened to enhance the adaptability of the base under different geological conditions, realizing the targeted strengthening of the upper force-bearing structure of the support base body 1. A large inclined surface and arc surface structure are set at the installation and force-bearing positions of the connecting rod and the key support rod of the support base body 1. The inclined surface and arc surface structure are set on the coaxial side of the force-bearing of the support rod, which can reduce stress concentration and can provide a stable temporary support for it in case of the disengagement of the connecting rod, effectively improving the structural bearing strength and working reliability of the base.

[0038] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. An integrally cast hydraulic support base, comprising a support body (1), characterized in that: The bracket base body (1) is provided with an integral casting structure. A front pedal (3) is arranged at the front part of the bracket base body (1). A first box structure (10) is arranged inside the front pedal (3). A bridge seat (2) is arranged in the middle of the bracket base body (1). A second box structure (11) is arranged inside the bridge seat (2). Reinforcing ribs (12) are arranged inside both the first box structure (10) and the second box structure (11). A socket groove (4) is arranged at the upper support docking part of the bracket base body (1). A protective inclined surface (5) is arranged on the side of the socket groove (4). A first mounting hole (6) and a second mounting hole (8) are arranged at the rear part of the bracket base body (1). A first arc surface (7) and a second arc surface (9) are respectively arranged at the docking and mounting sides of the first mounting hole (6) and the second mounting hole (8).

2. The integral casting type hydraulic support base according to claim 1, characterized in that: The front pedals (3) are arranged in pairs. The two groups of front pedals (3) are symmetrically and integrally fixed and installed on both sides of the front part of the bracket base body (1). The front pedals (3) are arranged with a narrow front and a wide rear. The upper joint part of the front pedals (3) is arranged with a transition arc surface. Anti-slip convex patterns (13) are evenly arranged on the upper part of the front pedals (3).

3. The integral casting type hydraulic support base according to claim 2, characterized in that: The first box structure (10) is in the shape of a box cavity and is arranged in the middle of the inner side of the front pedal (3).

4. The integral casting type hydraulic support base according to claim 3, characterized in that: The bridge seat (2) is arranged in the middle of the bracket base body (1). The second box structure (11) is in the shape of a box cavity and is arranged in the middle of the inner side of the bridge seat (2).

5. The integral casting type hydraulic support base according to claim 4, wherein: The reinforcing ribs (12) are fixedly arranged at the middle hollow stress-bearing parts of the first box structure (10) and the second box structure (11).

6. The integral casting type hydraulic support base according to claim 5, characterized in that: Each single group of the reinforcing ribs (12) is arranged in pairs. The distance between the two reinforcing ribs (12) is 8 - 25 mm, and the thickness of the reinforcing ribs (12) is 5 - 12 mm.

7. The integral casting type hydraulic support base according to claim 1, characterized in that: The socket grooves (4) are arranged in pairs and are in the structure of hemispherical grooves. The two groups of socket grooves (4) are located at the cylinder installation part on the upper part of the bracket base body (1).

8. The integral casting type hydraulic support base according to claim 7, wherein: The inner side of the socket groove (4) is smooth. A circular arc-shaped transition notch is arranged at the front side of the socket groove (4). The protective inclined surface (5) is arranged on the opposite side of the transition notch. The inclination angle of the protective inclined surface (5) is 125 - 135 degrees, and the inclined surface side of the protective inclined surface (5) is smooth.

9. The integral casting type hydraulic support base according to claim 1, characterized in that: The first mounting hole (6) and the second mounting hole (8) are distributed in a stepped manner up and down. The first mounting hole (6) and the second mounting hole (8) penetrate through the rear part of the bracket base body (1) in sequence. The two side parts of the openings of the first mounting hole (6) and the second mounting hole (8) are thickened.

10. The integral casting type hydraulic support base according to claim 9, characterized in that: Bearing platforms are arranged at the opening parts of the first mounting hole (6) and the second mounting hole (8). The first arc surface (7) and the second arc surface (9) are respectively arranged at the side transition parts of the two bearing platforms. The first arc surface (7) and the second arc surface (9) are both located at the stress-bearing orientation side of the support rod. The arc surface sides of the first arc surface (7) and the second arc surface (9) are smooth.

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