Safety supporting frame for coal mine

Abstract

The utility model provides a safety support frame for coal mine, which comprises a base and two hydraulic cylinder bodies, the two hydraulic cylinder bodies are respectively and fixedly arranged on two sides of the top of the base, the tops of the two hydraulic cylinder bodies are respectively provided with a telescopic end rod, and a support top frame is jointly arranged between the top ends of the two telescopic end rods. Compared with the prior art, the protective cover has the following beneficial effects that the joint of the hydraulic cylinder body and the telescopic end rod is covered by the two protective sleeve shells, so that dust directly falls on the top of the protective shell and slides downwards in the coal mining process, and cannot enter the joint of the telescopic end rod and the hydraulic cylinder body from top to bottom; in the process that the hydraulic cylinder body drives the telescopic end rod to contract, dust on the surface of the telescopic end rod is scraped off through the rubber strip and prevented from being brought into the hydraulic cylinder body, a sealing rubber ring in the hydraulic cylinder body cannot be abraded by the dust, the oil sealing performance cannot be damaged, and the service life of the coal mine safety supporting frame is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to a safety support frame for coal mines, belonging to the field of coal mine safety protection equipment. Background Art

[0002] Before coal mining, support frames need to be installed inside the mine tunnel and provide stable support for the top of the mine tunnel to avoid mine tunnel collapse during coal mining.

[0003] The existing coal mine safety support uses a hydraulic cylinder to drive the support to rise and fall, so as to adapt to coal mines of different heights. However, during the coal mining process, there is a large amount of dust in the air, and dust and gravel are easily accumulated at the connection between the output end rod of the hydraulic cylinder and the fixed cylinder body. When the output end rod retracts, some dust adheres to the surface of the telescopic rod of the hydraulic cylinder and is brought into the interior of the hydraulic cylinder body as the telescopic rod retracts, causing the internal sealing ring to wear and the oil sealing inside the hydraulic cylinder to decrease, thereby affecting the normal extension and contraction of the hydraulic cylinder and shortening the service life of the coal mine safety support frame.

[0004] In summary, the present invention provides a safety support frame for coal mines to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a safety support frame for coal mines to solve the problem proposed in the above background technology that dust easily accumulates at the extension and retraction part of the hydraulic cylinder and is brought into the interior as the hydraulic cylinder contracts, causing wear of the sealing ring.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solution: a safety support frame for coal mines, comprising a base and two hydraulic cylinder bodies, the two hydraulic cylinder bodies are fixedly installed on both sides of the top of the base, and telescopic end rods are installed on the top of the two hydraulic cylinder bodies. A supporting top frame is commonly installed between the top ends of the two telescopic end rods, and the connection between the two hydraulic cylinder bodies and the two telescopic end rods is provided with a protective shell.

[0007] Furthermore, the protective shell includes two protective shells, which are respectively sleeved on the front and back sides of the connection between the hydraulic cylinder body and the telescopic end rod, and the opposite sides of the two protective shells are spliced ​​with each other. The tops of the opposite sides of the two protective shells are provided with grooves for matching the telescopic end rod, and rubber strips are fixedly adhered inside the grooves. The grooves on the top of the protective shells are tightly fitted with the surface of the telescopic end rod through the rubber strips.

[0008] Furthermore, a gasket is fixedly installed inside the protective shell and at the top edge of the hydraulic cylinder body. The bottom of the gasket is provided with an annular right-angle groove embedded with the top edge of the hydraulic cylinder body.

[0009] Furthermore, connecting plates are fixedly connected on both sides of the two protective shells, and every two adjacent connecting plates are fitted together. Both connecting plates are provided with a plurality of front-to-back aligned threaded holes, and the two adjacent connecting plates are fixedly connected with external bolts through the threaded holes.

[0010] Furthermore, the top of the protective shell is in a spherical convex shape, and the bottom of the protective shell is in an open shape.

[0011] Furthermore, the support top frame includes a support plate, which is fixedly installed between the top ends of the two telescopic end rods, and a top support plate is fixedly installed between the two sides of the support plate and above the support plate, and the top support plate is curved in an arc shape, and a first reinforcement plate is fixedly installed between the two sides of the concave surface of the top support plate and the top of the support plate, and a second reinforcement plate is fixedly installed between the two sides of the top of the support plate and the two sides of the concave surface of the top support plate, a reinforcement plate is fixedly installed between the top of one side of the first reinforcement plate and the bottom of one side of the second reinforcement plate, and a support block is embedded at the angle between the other side of the second reinforcement plate and the inner concave surface of the top support plate, and a positioning plate is fixedly installed between the bottom of the support block and the top of the support plate.

[0012] Beneficial effects of the utility model:

[0013] The connection between the hydraulic cylinder and the telescopic end rod is covered by two protective shells, so that dust in the coal mining process directly falls on the top of the protective shell and slides down, and will not enter the connection between the telescopic end rod and the hydraulic cylinder from top to bottom. As the hydraulic cylinder drives the telescopic end rod to contract, the dust on the surface of the telescopic end rod is scraped off by the rubber strip to avoid it from entering the interior of the hydraulic cylinder. The sealing rubber ring inside the hydraulic cylinder will not be worn by dust, and the oil sealing will not be damaged, which effectively extends the service life of the coal mine safety support frame.

[0014] The space between the top support plate and the support plate can be reasonably divided into connected triangular spaces by the two first reinforcement plates and the two second reinforcement plates. While the coal mine roof is supported by the arc-shaped top support plate, the arc-shaped top of the top support plate is evenly supported by the two first reinforcement plates and the two second reinforcement plates. At the same time, the positioning plate and the support block can reinforce and support the connection between the second reinforcement plate and the top support plate, avoiding the phenomenon of fracture caused by excessive force at the connection between the second reinforcement plate and the top support plate, thereby effectively improving the safety of coal mine support. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 This is a three-dimensional diagram of a safety support frame for coal mines according to the utility model;

[0017] Figure 2 This is a front view of a safety support frame for coal mines according to the utility model;

[0018] Figure 3 for Figure 2 A main cross-sectional view of the protective casing shown;

[0019] Figure 4 for Figure 3 Bottom view of the protective casing shown.

[0020] In the figure: 1. Base; 2. Hydraulic cylinder body; 3. Telescopic end rod; 4. Protective sleeve; 5. Support top frame; 41. Protective shell; 42. Rubber strip; 43. Gasket; 44. Connecting plate; 45. Threaded hole; 51. Support plate; 52. Top support plate; 53. First reinforcement plate; 54. Reinforcement plate; 55. Second reinforcement plate; 56. Positioning plate; 57. Support block. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figure 1-4The utility model provides a technical solution: a safety support frame for coal mines, comprising a base 1 and two hydraulic cylinder bodies 2, the two hydraulic cylinder bodies 2 are fixedly mounted on both sides of the top of the base 1, the tops of the two hydraulic cylinder bodies 2 are each installed with a telescopic end rod 3, and a supporting top frame 5 is commonly installed between the tops of the two telescopic end rods 3, the connection between the two hydraulic cylinder bodies 2 and the two telescopic end rods 3 is sleeved with a protective shell 4, the protective shell 4 includes two protective shells 41, the two protective shells 41 are respectively sleeved to the front and back of the connection between the hydraulic cylinder body 2 and the telescopic end rod 3, the opposite sides of the two protective shells 41 are spliced ​​with each other, the tops of the opposite sides of the two protective shells 41 are each provided with a groove for fitting the telescopic end rod 3, and a rubber strip 42 is fixedly adhered inside the groove, and the top groove of the protective shell 41 is connected to the telescopic end rod 3 through the rubber strip 42 The surface of the protective shell 41 fits tightly, and the sealing of the top connection of the two protective shells 4 and the top of the telescopic end rod 3 can be improved by the rubber strip 42. A gasket 43 is fixedly installed inside the protective shell 41 and at the top edge of the hydraulic cylinder body 2. The bottom of the gasket 43 is provided with an annular right-angle groove which is embedded with the top edge of the hydraulic cylinder body 2. The two gaskets 43 can prevent dust from entering the connection between the hydraulic cylinder body 2 and the telescopic end rod 3 from the bottom of the protective shell 41. Connecting plates 44 are fixedly connected on both sides of the two protective shells 41. Every two adjacent connecting plates 44 fit each other, and a plurality of front-to-back aligned threaded holes 45 are provided on the two connecting plates 44. The two adjacent connecting plates 44 are fixedly connected with external bolts through the threaded holes 45. The top of the protective shell 41 is spherical and the bottom of the protective shell 41 is open.

[0023] See also Figure 2-4The support frame 5 includes a support plate 51, which is fixedly installed between the top ends of the two telescopic end rods 3. A top support plate 52 is fixedly installed between the two sides of the support plate 51 and above the support plate 51. The top support plate 52 is curved in an arc shape. A first reinforcing plate 53 is fixedly installed between the two sides of the concave surface of the top support plate 52 and the top of the support plate 51. A second reinforcing plate 55 is fixedly installed between the two sides of the top of the support plate 51 and the two sides of the concave surface of the top support plate 52. A reinforcing plate 54 is fixedly installed between the top of one side of the first reinforcing plate 53 and the bottom of one side of the second reinforcing plate 55. A reinforcing plate 54 is fixedly installed between the top of one side of the first reinforcing plate 53 and the bottom of one side of the second reinforcing plate 55. A reinforcing plate 54 is embedded at the angle between the other side of the second reinforcing plate 55 and the concave surface of the top support plate 52. The support block 57 has a positioning plate 56 fixedly installed between the bottom of the support block 57 and the top of the support plate 51. The space between the top support plate 52 and the support plate 51 can be reasonably divided into connected triangular spaces by the two first reinforcing plates 53 and the two second reinforcing plates 55. While the coal mine roof is supported by the arc-shaped top support plate 52, the arc-shaped top of the top support plate 52 is evenly supported by the two first reinforcing plates 53 and the two second reinforcing plates 55. At the same time, the positioning plate 56 and the support block 57 can reinforce and support the connection between the second reinforcing plate 55 and the top support plate 52 to avoid the phenomenon of excessive force on the connection between the second reinforcing plate 55 and the top support plate 52 and causing breakage.

[0024] Specific implementation: The protective shells 41 inside the two protective shells 4 are spliced ​​together to form a complete cover body and can cover the connection between the hydraulic cylinder body 2 and the telescopic end rod 3. The groove on the top of the protective shell 41 is tightly fitted with the surface of the telescopic end rod 3 through the rubber strip 42. The rubber strip 42 can improve the sealing performance of the connection between the top of the splicing of the two protective shells 4 and the top of the telescopic end rod 3, so that during the coal mining process, dust directly falls on the top of the protective shell 41 and slides down, and will not enter the connection between the telescopic end rod 3 and the hydraulic cylinder body 2 from top to bottom. In addition, as the hydraulic cylinder body 2 drives the telescopic end rod 3 to retract, the rubber strip 42 can be used to tighten the telescopic end rod 3. The dust on the surface of the retracted end rod 3 is scraped off to prevent it from being brought into the interior of the hydraulic cylinder body 2. The sealing rubber ring inside the hydraulic cylinder body 2 will not be worn by dust, and the oil sealing will not be destroyed, so that the hydraulic cylinder body 2 can mobilize the telescopic end rod 3 to normally retract and retract and adjust the overall height of the coal mine safety support frame, effectively extending the service life of the coal mine safety support frame. A gasket 43 is fixedly installed inside the protective shell 41 and at the top edge of the hydraulic cylinder body 2. The bottom of the gasket 43 is provided with an annular right-angle groove embedded with the top edge of the hydraulic cylinder body 2. The two gaskets 43 can prevent dust from entering the connection between the hydraulic cylinder body 2 and the telescopic end rod 3 from the bottom of the protective shell 41.

[0025] The space between the top support plate 52 and the support plate 51 can be reasonably divided into connected triangular spaces by the two first reinforcement plates 53 and the two second reinforcement plates 55. While the coal mine roof is supported by the arc-shaped top support plate 52, the arc-shaped top of the top support plate 52 is evenly supported by the two first reinforcement plates 53 and the two second reinforcement plates 55. At the same time, the positioning plate 56 and the support block 57 can reinforce and support the connection between the second reinforcement plate 55 and the top support plate 52, avoiding the phenomenon of fracture caused by excessive force at the connection between the second reinforcement plate 55 and the top support plate 52, thereby effectively improving the safety of coal mine support.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A safety support frame for coal mines, comprising a base (1) and two hydraulic cylinders (2), characterized in that: The two hydraulic cylinder bodies (2) are respectively fixedly mounted on both sides of the top of the base (1); telescopic end rods (3) are mounted on the tops of the two hydraulic cylinder bodies (2); a supporting top frame (5) is mounted between the tops of the two telescopic end rods (3); and protective sleeves (4) are mounted at the connections between the two hydraulic cylinder bodies (2) and the two telescopic end rods (3).

2. A safety support frame for coal mines according to claim 1, characterized in that: The protective shell (4) includes two protective shells (41), and the two protective shells (41) are respectively sleeved on the front and back of the connection between the hydraulic cylinder body (2) and the telescopic end rod (3). The opposite sides of the two protective shells (41) are spliced ​​with each other. The tops of the opposite sides of the two protective shells (41) are each provided with a groove for matching the telescopic end rod (3), and a rubber strip (42) is fixedly adhered inside the groove. The groove at the top of the protective shell (41) is tightly fitted with the surface of the telescopic end rod (3) through the rubber strip (42).

3. A safety support frame for coal mines according to claim 2, characterized in that: A gasket (43) is fixedly installed inside the protective shell (41) and at the top edge of the hydraulic cylinder body (2). The bottom of the gasket (43) is provided with an annular right-angle groove that is embedded with the top edge of the hydraulic cylinder body (2).

4. A safety support frame for coal mines according to claim 2, characterized in that: Both sides of the two protective shells (41) are fixedly connected with connecting plates (44), and each two adjacent connecting plates (44) are fitted together. A plurality of threaded holes (45) aligned front and back are provided on the two connecting plates (44), and the two adjacent connecting plates (44) are fixedly connected with external bolts through the threaded holes (45).

5. A safety support frame for coal mines according to claim 2, characterized in that: The top of the protective shell (41) is in a spherical convex shape, and the bottom of the protective shell (41) is in an open shape.

6. A safety support frame for coal mines according to claim 1, characterized in that: The support top frame (5) includes a support plate (51), the support plate (51) is fixedly installed between the top ends of the two telescopic end rods (3), a top support plate (52) is fixedly installed between the two sides of the support plate (51) and above the support plate (51), the top support plate (52) is curved in an arc shape, a first reinforcement plate (53) is fixedly installed between the two sides of the inner concave surface of the top support plate (52) and the top of the support plate (51), a second reinforcement plate (55) is fixedly installed between the two sides of the top of the support plate (51) and the two sides of the inner concave surface of the top support plate (52), a reinforcement plate (54) is fixedly installed between the top of one side of the first reinforcement plate (53) and the bottom of one side of the second reinforcement plate (55), a support block (57) is embedded at an angle between the other side of the second reinforcement plate (55) and the inner concave surface of the top support plate (52), and a positioning plate (56) is fixedly installed between the bottom of the support block (57) and the top of the support plate (51).

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