End face sealing mechanism and jumbo using the same

Abstract

The application provides a face seal mechanism and a drill jumbo using the mechanism. The face seal mechanism comprises a first pressing frame, a second pressing frame and a sealing frame, the sealing frame is located between the first pressing frame and the second pressing frame, and the first pressing frame and the second pressing frame are matched to clamp the sealing frame; an inner periphery of the sealing frame is provided with a lip for sealing, the lip comprises a working surface, the working surface is an annular surface, the working surface comprises an inner concave area and a contact area, a cross section of the inner concave area is an arc surface, and a cross section of the contact area is a curved surface. The drill jumbo comprises the face seal mechanism. The application aims to provide a face seal mechanism and a drill jumbo using the mechanism, which can effectively reduce impurities from entering a gap between a basic arm and a telescopic arm of the drill jumbo.

Description

Technical Field

[0001] This invention relates to the field of mining trolleys, and more particularly to an end-face sealing mechanism and a rock drilling trolley using the mechanism. Background Technology

[0002] Rock drilling equipment is a mechanized drilling device that uses machinery to support rock drills instead of people. It is the main equipment in the mining production process. The rock drilling rig is one of the most important rock drilling equipment. The rock drilling rig is also called a rock drilling car. It is a machine that supports the rock drill to drill rock holes and moves with the help of various power sources. The rock drilling rig consists of one or more rock drills and their automatic propellers, drill arms and their amplitude adjustment mechanisms, drill car frames, and traveling mechanisms.

[0003] Existing rock drilling rigs have a telescopic boom on their basic arm. Operators operate the telescopic boom to move the drill arm connected to it and adjust the position of the drill bit. In the working environment of the rock drilling rig, there are often many rock chips, water, dust or other large particulate impurities. During the extension and retraction of the telescopic boom, some impurities will be carried into the gap between the basic arm and the telescopic boom, causing wear on the inner wall of the basic arm and the outer wall of the telescopic boom, thus affecting the durability of the rock drilling rig's telescopic boom.

[0004] For example, CN207526422U, this utility model provides a rock drilling rig and its boom, including a boom body, the end of which is provided with a dustproof device. The dustproof device includes an annular mounting plate fixedly connected to the end face of the boom body, a sealing ring for sealing with the telescopic boom, and a cover plate; the center of the axial outer end face of the mounting plate is provided with an annular groove coaxially arranged with the boom body, the sealing ring is embedded in the annular groove, and the thickness of the sealing ring is not less than the depth of the annular groove; the cover plate cooperates with the mounting plate to clamp the sealing ring; the inner circumference of the sealing ring is provided with a V-shaped lip opening towards the central axis of the boom body.

[0005] The aforementioned rock drilling rig and its boom have sealing protection and dustproof effects, but still have certain defects. The sealing ring is embedded in the annular groove, and the mounting plate needs to have an annular groove. The annular mounting plate is fixedly connected to the boom body, and the mounting plate cannot be disassembled for repair when it is damaged. The structure of the V-shaped lip has certain defects. Summary of the Invention

[0006] The purpose of this invention is to provide an end-face sealing mechanism and a rock drilling rig using the mechanism, which can effectively reduce the gap between the basic arm and the telescopic arm of the rock drilling rig that allows impurities to enter.

[0007] According to one aspect of the present invention, an end-face sealing mechanism is provided, the end-face sealing mechanism comprising a first pressure frame, a second pressure frame, and a sealing frame, the sealing frame being located between the first pressure frame and the second pressure frame, the first pressure frame and the second pressure frame cooperating to clamp the sealing frame; the inner circumference of the sealing frame is provided with a lip for sealing, the lip including a working surface, the working surface being an annular surface, the working surface including a concave region and a contact region, the cross-section of the concave region being an arc surface, and the cross-section of the contact region being a curved surface.

[0008] In some embodiments, the contact area includes a first area, a second area, a third area, and a fourth area, wherein the cross-sections of the first and second areas are inclined planes, and the cross-sections of the third and fourth areas are planes; the concave area is located between the first and second areas, the first area is located between the concave area and the third area, and the second area is located between the concave area and the fourth area.

[0009] In some embodiments, in the cross-section of the lip, the intersection of the first region and the third region is the first intersection point, the intersection of the second region and the fourth region is the second intersection point, and the line connecting the first intersection point and the second intersection point is the first connecting line; the intersection of the concave region and the first region is the third intersection point, the intersection of the concave region and the second region is the fourth intersection point, and the line connecting the third intersection point and the fourth intersection point is the second connecting line; the first connecting line and the second connecting line are parallel, and the distance between the first connecting line and the second connecting line is 0.5 to 2.0 mm.

[0010] In some embodiments, the fourth region of the contact surface is chamfered.

[0011] In some embodiments, the first pressing frame has a first inclined surface, and the second pressing frame has a second inclined surface; the first inclined surface can fit against one side of the lips, and the second inclined surface can fit against the other side of the lips.

[0012] In some embodiments, the first pressure frame, the second pressure frame, and the sealing frame are all provided with a plurality of bolt holes; the bolt holes of the first pressure frame and the second pressure frame are of the same size; the bolt holes of the sealing frame are larger than the bolt holes of the first pressure frame or the second pressure frame.

[0013] In some embodiments, the sealing frame consists of four sealing blocks.

[0014] In some embodiments, the sealing frame is made of polyurethane rubber material.

[0015] According to another aspect of the invention, a rock drilling rig is also provided, the rock drilling rig including the aforementioned end face sealing mechanism.

[0016] In some embodiments, the rock drilling rig includes a basic arm and a telescopic arm, the basic arm being connected to the telescopic arm; a connecting frame is provided on the basic arm, the connecting frame being connected to the basic arm; the connecting frame is connected to an end face sealing mechanism.

[0017] In some embodiments, the connecting frame is connected to the end face sealing mechanism by a bolt structure.

[0018] In this invention, the first pressure frame and the second pressure frame work together to clamp the sealing frame, resulting in a simple structure; the connecting frame and the end face sealing mechanism are detachably connected, facilitating the disassembly and repair of the end face sealing mechanism; the end face sealing mechanism can effectively reduce the gap between the basic arm and the telescopic arm of the rock drilling rig from the entry of impurities. Attached Figure Description

[0019] The present disclosure will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn for the purpose of explaining the preferred embodiments only and should therefore not be construed as limiting the scope of the present disclosure. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a perspective view of the first clamping frame of this application;

[0021] Figure 2 This is a perspective view of the second clamping frame of this application;

[0022] Figure 3 This is a perspective view of the sealing frame of this application;

[0023] Figure 4 This is a front view of the end-face sealing mechanism of this application;

[0024] Figure 5 This is a right view of the end-face sealing mechanism of this application;

[0025] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0026] Figure 7 for Figure 6 Enlarged view of point B;

[0027] Figure 8 for Figure 6 Enlarged view of point C;

[0028] Figure 9 This is a perspective view of the end-face sealing mechanism of this application;

[0029] Figure 10 for Figure 9 Enlarged view of point D;

[0030] Figure 11 This is a three-dimensional assembly drawing of the end-face sealing mechanism of this application;

[0031] Figure 12 This is a front view of the rock drilling rig used in this application;

[0032] Figure 13 This is a cross-sectional view of the rock drilling rig used in this application;

[0033] Figure 14 for Figure 13 Enlarged view of point E;

[0034] In the diagram: 1. First pressure frame; 2. Second pressure frame; 3. Sealing frame; 4. First inclined surface; 5. Second inclined surface; 6. Lip; 7. Concave area; 8. First area; 9. Second area; 10. Third area; 11. Fourth area; 12. Chamfer; 13. Basic arm; 14. Connecting frame; 15. End face sealing mechanism; 16. Telescopic arm; 17. First sealing block; 18. Second sealing block; 19. Third sealing block; 20. Fourth sealing block; 21. First connecting line; 22. Second connecting line. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Please see Figures 1-4The figures shown are perspective views of the first pressure frame, the second pressure frame, the sealing frame, and the front view of the end-face sealing mechanism of this application, respectively. The end-face sealing mechanism 15 includes a first pressure frame 1, a second pressure frame 2, and a sealing frame 3. The sealing frame 3 is located between the first pressure frame 1 and the second pressure frame 2. The first pressure frame 1 and the second pressure frame 2 cooperate to clamp the sealing frame 3. The inner circumference of the sealing frame 3 is provided with a lip 6 for sealing. The first pressure frame 1 is provided with a first inclined surface 4, and the second pressure frame 2 is provided with a second inclined surface 5. The first inclined surface 4 can fit with one side of the lip 6, and the second inclined surface 5 can fit with the other side of the lip 6.

[0038] The first pressure frame 1, the second pressure frame 2, and the sealing frame 3 are all provided with several bolt holes. The bolt holes of the first pressure frame 1 match the bolt holes of the sealing frame 3, and the bolt holes of the second pressure frame 2 match the bolt holes of the sealing frame 3.

[0039] The sealing frame 3 is made of polyurethane rubber material. By manufacturing the sealing frame 3 with polyurethane rubber material, the sealing frame 3 can have good wear resistance and shock absorption effect.

[0040] The sealing frame 3 consists of four sealing blocks. The sealing frame 3 can be disassembled into four sealing blocks, which can be spliced ​​together to form the sealing frame 3. The sealing blocks include a first sealing block 17, a second sealing block 18, a third sealing block 19, and a fourth sealing block 20. One end of the first sealing block 17 is connected to the fourth sealing block 20, and the other end of the first sealing block 17 is connected to the second sealing block 18. One end of the second sealing block 18 is connected to the first sealing block 17, and the other end of the second sealing block 18 is connected to the third sealing block 19. One end of the third sealing block 19 is connected to the second sealing block 18, and the other end of the third sealing block 19 is connected to the fourth sealing block 20. One end of the fourth sealing block 20 is connected to the third sealing block 19, and the other end of the fourth sealing block is connected to the first sealing block 17. When the sealing frame 3 is partially damaged and cannot be used, only the damaged sealing block needs to be replaced. The maintenance method is convenient and can reduce the usage cost of the sealing frame 3.

[0041] The sealing block has connecting surfaces at both ends. The connecting surfaces include an arc-shaped area and a fitting area. The arc-shaped area is an arc surface, which can increase the elastic deformation space when the sealing blocks are squeezed together. The fitting area is an inclined surface, which can increase the sealing performance when the sealing blocks are fitted together.

[0042] Please see Figures 5-8The figures shown are a right view of the end-face sealing mechanism of this application, a cross-sectional view of the right view of the end-face sealing mechanism along the AA direction, an enlarged view at point B of the cross-sectional view of the right view of the end-face sealing mechanism along the AA direction, and an enlarged view at point C of the cross-sectional view of the right view of the end-face sealing mechanism along the AA direction. The inner circumference of the sealing frame 3 is provided with a lip 6 for sealing. The lip 6 includes a working surface, which is an annular surface. The working surface includes a concave region 7 and a contact region. The cross-section of the concave region 7 is an arc surface, and the cross-section of the contact region is a curved surface. The contact region includes a first region 8, a second region 9, a third region 10, and a fourth region 11. The cross-sections of the first region 8 and the second region 9 are inclined surfaces, and the cross-sections of the third region 10 and the fourth region 11 are planes. The concave region 7 is located between the first region 8 and the second region 9, the first region 8 is located between the concave region 7 and the third region 10, and the second region 9 is located between the concave region 7 and the fourth region 11.

[0043] The concave region 7 is an arc surface. When the telescopic arm 16 applies pressure to the concave region 7, the arc surface is not easily torn when it deforms under pressure. When the telescopic arm 16 passes through the lip 6, the arc surface can reduce the friction area between the lip 6 and the telescopic arm 16. The first region 8 and the second region 9 are inclined surfaces. When the telescopic arm 16 applies pressure to the first region 8 or the second region 9, the inclined surface is squeezed and deforms to fit the surface of the telescopic arm 16, which can increase the elastic deformation space and sealing of the lip 6. When the telescopic arm 16 passes through the lip 6, the inclined surface can reduce the friction area between the lip 6 and the telescopic arm 16. The third region 10 and the fourth region 11 are flat surfaces. When the telescopic arm 16 applies pressure to the third region 10 or the fourth region 11, the flat surface is pressed to fit the surface of the telescopic arm 16, which can increase the sealing of the lip 6. When the telescopic arm 16 passes through the lip 6, the flat surface can guide the telescopic arm 16.

[0044] In the cross-section of the lip 6, the intersection of the first region 8 and the third region 10 is the first intersection point, the intersection of the second region 9 and the fourth region 11 is the second intersection point, and the line connecting the first and second intersection points is the first connecting line 21; the intersection of the concave region 7 and the first region 8 is the third intersection point, the intersection of the concave region 7 and the second region 9 is the fourth intersection point, and the line connecting the third and fourth intersection points is the second connecting line 22; the first connecting line 21 and the second connecting line 22 are parallel, and the distance between the first connecting line 21 and the second connecting line 22 is 0.5 to 2.0 mm; in this embodiment, the distance between the first connecting line 21 and the second connecting line 22 is 1.5 mm. The first region 8 and the second region 9 of the working surface of the lip 6 are deformed by compression and fit against the surface of the telescopic arm 16, which can increase the sealing effect of the lip 6.

[0045] The concave region 7, the first region 8, and the second region 9 occupy a large proportion of the working surface, which can reduce the friction area between the lip 6 and the telescopic arm 16 and increase the elastic deformation space of the working surface; the third region 10 and the fourth region 11 occupy a small proportion of the lip 6, which can guide the telescopic arm 16 and assist the telescopic arm 16 in passing through the lip 6.

[0046] The bolt holes of the first pressure frame 1 and the second pressure frame 2 are the same size. The bolt holes of the sealing frame 3 are larger than those of the first pressure frame 1 and the second pressure frame 2. When the first pressure frame 1 and the second pressure frame 2 clamp the sealing frame 3, the sealing frame 3 is deformed by compression, and the size of the bolt holes of the sealing frame 3 becomes smaller. If the size of the bolt holes of the sealing frame 3 is the same as that of the first pressure frame 1 and the second pressure frame 2, then when the size of the bolt holes of the sealing frame 3 becomes smaller, the bolts inside the bolt holes of the sealing frame 3 are easily compressed. If the size of the bolt holes of the sealing block is larger than that of the first pressure frame 1 and the second pressure frame 2, then when the size of the bolt holes of the sealing frame 3 becomes smaller, the bolts inside the bolt holes of the sealing frame 3 are less likely to be compressed, which can increase the stability of the bolts inside the bolt holes of the sealing frame 3.

[0047] Please see Figure 9 and Figure 10 The figures shown are a perspective view of the end-face sealing mechanism of this application and an enlarged view of point D in the perspective view of the end-face sealing mechanism. In this embodiment, the fourth region 11 of the working surface of the lip 6 is provided with a chamfer 12. When the telescopic arm 16 passes through the lip 6, the chamfer 12 at the fourth region 11 can prevent the lip 6 from curling when the telescopic arm 16 applies pressure to the fourth region 11. In some embodiments, both the third region 10 and the fourth region 11 of the working surface of the lip 6 are provided with a chamfer 12. The first sealing block 17 is the same as the third sealing block 19, and the second sealing block 18 is the same as the fourth sealing block 20. The first sealing block 17 and the third sealing block 19 can be interchanged with each other, and the second sealing block 18 and the fourth sealing block 20 can be interchanged with each other. In practice, only two types of sealing blocks need to be produced, and the inventory pressure of sealing blocks can be reduced.

[0048] Please see Figures 11-14The figures shown are a three-dimensional assembly drawing of the end-face sealing mechanism of this application, a front view of the rock drilling rig, a sectional view of the rock drilling rig, and an enlarged view of section E of the sectional view of the rock drilling rig. The rock drilling rig includes an end-face sealing mechanism 15. The rock drilling rig includes a basic arm 13 and a telescopic arm 16. The basic arm 13 is connected to the telescopic arm 16. The telescopic arm 16 is partially located inside the basic arm 13 and can slide inside the basic arm 13. A connecting frame 14 is provided on the basic arm 13 and is connected to the basic arm 13. The connecting frame 14 is connected to the end-face sealing mechanism 15. The basic arm 13 is connected to the end-face sealing mechanism 15 through the connecting frame 14. The end-face sealing mechanism 15 is connected to the connecting frame 14 through a bolt structure. The connecting frame 14 is provided with threaded holes, and the bolts match the threaded holes of the connecting frame 14. The first pressure frame 1, the second pressure frame 2, and the sealing frame 3 are provided with bolt holes, and the bolts match the bolt holes of the first pressure frame 1, the second pressure frame 2, and the sealing frame 3.

[0049] The bolt shank is also equipped with a washer. When the end face sealing mechanism 15 is installed on the basic arm 13, the washer is located between the second pressure frame 2 and the head of the bolt. The washer can reduce the wear of the bolt head on the second pressure frame 2 and disperse the pressure applied by the bolt head on the second pressure frame 2.

[0050] Bolts can pass through the bolt holes of the second pressure frame 2, the sealing frame 3 and the first pressure frame 1 in sequence. The bolts are connected to the threaded holes of the connecting frame 14. The end face sealing mechanism 15 is bolted to the connecting frame 14. The basic arm 13 is connected to the end face sealing mechanism 15 through the connecting frame 14. The telescopic arm 16 can pass through the fourth region 11, the second region 9, the concave region 7, the first region 8 and the third region 10 of the working surface in sequence. The telescopic arm 16 passes through the end face sealing mechanism 15. The telescopic arm 16 is connected to the basic arm 13, which can effectively reduce the gap between the basic arm 13 and the telescopic arm 16 of the rock drilling rig.

Claims

1. An end-face sealing mechanism, characterized in that, Used for telescopic arms; The end face sealing mechanism includes a first pressure frame, a second pressure frame, and a sealing frame. The sealing frame is located between the first pressure frame and the second pressure frame. The first pressure frame and the second pressure frame cooperate to clamp the sealing frame. The inner circumference of the sealing frame is provided with a lip for sealing. The lip includes a working surface, which is an annular surface. The working surface includes a concave region and a contact region. The cross-section of the concave region is an arc surface, and the cross-section of the contact region is a curved surface. The contact area includes a first area, a second area, a third area, and a fourth area. The cross-sections of the first and second areas are inclined planes, and the cross-sections of the third and fourth areas are planes. The concave region is located between the first region and the second region, the first region is located between the concave region and the third region, and the second region is located between the concave region and the fourth region. The first pressing frame has a first inclined surface, and the second pressing frame has a second inclined surface; the first inclined surface can fit against one side of the lips, and the second inclined surface can fit against the other side of the lips.

2. The end-face sealing mechanism according to claim 1, characterized in that, In the cross-section of the lip, the intersection of the first region and the third region is the first intersection point, the intersection of the second region and the fourth region is the second intersection point, and the line connecting the first intersection point and the second intersection point is the first connecting line; the intersection of the concave region and the first region is the third intersection point, the intersection of the concave region and the second region is the fourth intersection point, and the line connecting the third intersection point and the fourth intersection point is the second connecting line; the first connecting line and the second connecting line are parallel, and the distance between the first connecting line and the second connecting line is 0.5 to 2.0 mm.

3. The end-face sealing mechanism according to claim 1, characterized in that, The fourth region of the contact area is chamfered.

4. The end-face sealing mechanism according to claim 1, characterized in that, The first pressure frame, the second pressure frame, and the sealing frame are all provided with several bolt holes; The bolt holes of the first pressure frame and the second pressure frame have the same size; The bolt holes of the sealing frame are larger than the bolt holes of the first or second pressure frame.

5. The end-face sealing mechanism according to claim 1, characterized in that, The sealing frame consists of four sealing blocks.

6. The end-face sealing mechanism according to claim 1, characterized in that, The sealing frame is made of polyurethane rubber material.

7. A rock drilling rig, characterized in that, The rock drilling rig includes an end-face sealing mechanism according to any one of claims 1 to 6.

8. The rock drilling rig according to claim 7, characterized in that, The rock drilling rig includes a basic arm and a telescopic arm, with the basic arm and the telescopic arm connected together. The basic arm is provided with a connecting frame, and the connecting frame is connected to the basic arm; The connecting frame is connected to the end face sealing mechanism.

9. The rock drilling rig according to claim 8, characterized in that, The connecting frame is connected to the end face sealing mechanism via bolts.

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