Connecting structure of top coal caving transition hydraulic support

Abstract

The utility model relates to a connecting structure of a top coal caving transition hydraulic support. The connecting structure comprises a tail column, a swing beam and a base, the first spherical end is located between the two vertical plates of the first ball socket and abuts against the first ball socket, the first pin shaft penetrates through the first spherical end and the two vertical plates of the first ball socket, the second spherical end is located between the two vertical plates of the second ball socket and abuts against the second ball socket, and the second pin shaft penetrates through the second spherical end and the two vertical plates of the second ball socket. The tail column has the beneficial effects that the first spherical end and the second spherical end are connected with the first ball socket and the second ball socket, so that the contact area between the tail column and the swing beam as well as between the tail column and the base is increased, and the contact stress between the tail column and the swing beam as well as between the tail column and the base is reduced; the friction force between the first spherical end and the first ball socket and between the second spherical end and the second ball socket is reduced, and therefore the durability of the connecting structure of the tail column, the swing beam and the base is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic support technical field especially relates to a connection structure of top coal caving transition hydraulic support. BACKGROUND

[0002] The hydraulic support, the scraper conveyor and the coal mining machine are matched to form a "three-machine" of the coal mining face. The hydraulic support is divided into basic support, transition support, end support and advanced support according to the position in the work, and is divided into once full height support, top coal caving support, net laying support and filling support according to the coal mining method. The top coal caving transition support is used to be matched with the scraper conveyor at both ends of the top coal caving face. Because the motor of the scraper conveyor is arranged at the rear part of the top coal caving transition support, coal is not generally placed at the rear part, so when the coal is accumulated at the upper part of the rear part for a long time, the hydraulic support needs to have enough supporting force to support the coal at the upper part of the rear part to ensure the safety of the rear conveyor.

[0003] In the prior art, the rear part of the support is mainly supported by the tail column, the top end of the tail column is connected with the swing beam, the bottom end of the tail column is connected with the base, and the connecting part of the tail column and the base is a flat connecting piece, the hole in the connecting piece and the hole for connecting the tail column in the base have the same diameter; similarly, the connecting part of the tail column and the swing beam is a flat connecting piece, the hole in the connecting piece and the hole for connecting the tail column in the swing beam have the same diameter. The base, the swing beam and the tail column are connected by a pin shaft, and the connecting pin shaft is stressed when the tail column works. Therefore, the connecting pin shaft is stressed, and the pin shaft is easily damaged under the condition of friction and tension, the cost is increased for replacing parts in the mine, the safety of workers cannot be guaranteed, and the production efficiency is also affected.

[0004] Therefore, there is an urgent need for a connection structure of the top coal caving transition hydraulic support which is not easily damaged. UTILITY MODEL CONTENTS

[0005] (I) Technical problem to be solved

[0006] In view of the above-mentioned defects and shortcomings of the prior art, the utility model provides a connection structure of the top coal caving transition hydraulic support, which solves the technical problem that the connecting structure of the tail column and the base and the tail beam device is easily damaged in the prior art.

[0007] (II) Technical scheme

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0009] The utility model discloses an embodiment provides a kind of connection structure of top coal caving transition hydraulic support, including tail column and respectively rotating connection in the swing beam and base of tail column two ends;The two ends of tail column are first spherical end and second spherical end respectively, first ball socket is equipped on base, second ball socket is equipped on swing beam, both sides of first ball socket and second ball socket are equipped with vertical plate;First spherical end is located between the two vertical plates of first ball socket and with first ball socket abut, first pin shaft is passed through the two vertical plates of first spherical end and first ball socket, second spherical end is located between the two vertical plates of second ball socket and with second ball socket abut, second pin shaft is passed through the two vertical plates of second spherical end and second ball socket;First ball socket and second ball socket inner wall are equipped with several flow guide grooves, and several solid lubricating blocks are embedded in flow guide groove.

[0010] Optionally, the cross section of the flow guide groove is trapezoidal, and the height of the solid lubricating block is higher than the height of the trapezoid.

[0011] Optionally, the first ball socket further has a plurality of disc spring groups fixed at the bottom, each disc spring group includes a plurality of disc springs, and the first spherical end abuts against the disc spring group.

[0012] Optionally, the inner wall of the first ball socket and the second ball socket is cladded with a Co-based alloy layer, and the thickness of the Co-based alloy layer is 1-2 mm.

[0013] Optionally, the vertical plate is provided with a connecting hole, the first pin shaft and the second pin shaft are in interference fit with the connecting hole, and the through hole on the first ball socket and the second ball socket is larger than the size of the first pin shaft and the second pin shaft.

[0014] Optionally, the first pin shaft and the second pin shaft have a split structure, including a main pin shaft and a detachable pin shaft head, and the pin shaft head is connected to the main pin shaft by threads.

[0015] Optionally, the end of the main pin shaft away from the pin shaft head is provided with an anti-loosening clamping groove, the vertical plate corresponding to the anti-loosening clamping groove is provided with an anti-loosening piece, both free ends of the anti-loosening piece can be clamped into the anti-loosening clamping groove, and the first pin shaft and the second pin shaft are limited to rotate circumferentially.

[0016] Optionally, the edge of the first ball socket is provided with a rubber seal ring, the outer circle of the rubber seal ring is fixedly connected to the edge of the first ball socket, and the inner circle of the rubber seal ring abuts against the first spherical end.

[0017] Optionally, the rubber seal ring is filled with high-temperature lubricating grease.

[0018] (Three) beneficial effects

[0019] The beneficial effects of this utility model are as follows: The connection structure of the top coal caving transition hydraulic support of this utility model includes a tail column and a swing beam and a base respectively rotatably connected to both ends of the tail column; the two ends of the tail column are a first spherical end and a second spherical end, respectively; a first spherical socket is provided on the base, and a second spherical socket is provided on the swing beam; upright plates are provided on both sides of the first spherical socket and the second spherical socket; the first spherical end is located between the two upright plates of the first spherical socket and abuts against the first spherical socket; a first pin passes through the two upright plates of the first spherical end and the first spherical socket; the second spherical end is located between the two upright plates of the second spherical socket and abuts against the second spherical socket; a second pin passes through the two upright plates of the second spherical end and the second spherical socket; a plurality of guide grooves are provided on the inner walls of the first spherical socket and the second spherical socket, and a plurality of solid lubricating blocks are embedded in the guide grooves. Compared to existing technologies, by connecting the first spherical end and the second spherical end with the first and second ball sockets, the contact area between the tail column and the swing beam and the base is increased, thus reducing the contact stress between the tail column and the swing beam and the base. Moreover, the cooperation between the guide groove and the solid lubricating block reduces the friction between the first spherical end and the second spherical end and the first and second ball sockets, thus enhancing the durability of the connection structure between the tail column and the swing beam and the base. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection structure of the top coal caving transition hydraulic support of this utility model, according to Embodiment 1.

[0021] Figure 2 for Figure 1 The diagram shows a partial structural view of point A of the connection structure of the top coal caving transition hydraulic support;

[0022] Figure 3 for Figure 1 The diagram shows a structural schematic of an angle of the first ball socket in the connection structure of the top coal caving transition hydraulic support;

[0023] Figure 4 for Figure 1 The diagram shows a structural schematic of the first ball socket in the connection structure of the top coal caving transition hydraulic support at another angle;

[0024] Figure 5 This is a side view of the first ball socket in Embodiment 2 of the connection structure of the top coal caving transition hydraulic support of this utility model.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1: Tail column; 11: First spherical end; 12: Second spherical end;

[0027] 2: Base; 21: First ball socket; 22: Guide channel; 23: Solid lubricant block;

[0028] 3: Swing beam; 31: Second ball socket;

[0029] 4: Vertical plate; 41: Connecting hole; 42: Anti-loosening component;

[0030] 5: Disc spring assembly;

[0031] 6: Anti-loosening slot;

[0032] 7: Rubber sealing ring. Detailed Implementation

[0033] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1:

[0035] Reference Figures 1 to 5 This embodiment provides a connection structure for a top coal caving transition hydraulic support, used to connect the tail column 1 with the base 2 and the swing beam 3. Specifically, the connection structure of the top coal caving transition hydraulic support in this embodiment includes a tail column 1 and swing beams 3 and base 2 respectively rotatably connected to both ends of the tail column 1, as detailed below.

[0036] In this embodiment, the tail column 1 has a first spherical end 11 and a second spherical end 12 at its two ends. The base 2 has a first spherical socket 21, and the swing beam 3 has a second spherical socket 31. Vertical plates 4 are provided on both sides of the first spherical socket 21 and the second spherical socket 31. The first spherical end 11 is located between the two vertical plates 4 of the first spherical socket 21 and abuts against the first spherical socket 21. A first pin passes through the first spherical end 11 and the two vertical plates 4 of the first spherical socket 21. The second spherical end 12 is located between the two vertical plates 4 of the second spherical socket 31 and abuts against the second spherical socket 31. A second pin passes through the second spherical end 12 and the two vertical plates 4 of the second spherical socket 31. Several guide grooves 22 are provided on the inner walls of the first spherical socket 21 and the second spherical socket 31, and several solid lubricating blocks 23 are embedded in the guide grooves 22.

[0037] Specifically, the tail column 1 is a multi-section hydraulic cylinder that supports the lifting and lowering of the swing beam 3. The tail column 1 is rotatably connected to the top of the base 2 and the bottom of the swing beam 3 via pins. The first ball socket 21 is the part on the base 2 that abuts against the tail column 1 and has a spherical inner wall. The second ball socket 31 is the part on the swing beam 3 that abuts against the tail column 1 and has a spherical inner wall. The first spherical end 11 and the second spherical end 12 of the tail column 1 also have a spherical shape. Therefore, when the tail column 1 rotates, the first spherical end 11 and the second spherical end 12 have a larger contact area with the first ball socket 21 and the second ball socket 31, which disperses the pressure and tension on the first spherical end 11 and the second spherical end 12. This increases the durability of the connection structure between the tail column 1 and the swing beam 3 and the base 2. Several guide grooves 22 are evenly distributed along the inner walls of the first ball socket 21 and the second ball socket 31. When the tail column 1 is working, the first spherical end 11 and the second spherical end 12 respectively abut against the first ball socket 21 and the second ball socket 31. The solid lubricating block 23 effectively reduces the friction between the first spherical end 11 and the second spherical end 12 and the first ball socket 21 and the second ball socket 31.

[0038] In summary, compared with the prior art, by connecting the first spherical end 11 and the second spherical end 12 with the first ball socket 21 and the second ball socket 31, the contact area between the tail column 1 and the swing beam 3 and the base 2 is increased. Therefore, the contact stress between the tail column 1 and the swing beam 3 and the base 2 is reduced. Moreover, the cooperation between the guide groove 22 and the solid lubricating block 23 reduces the friction between the first spherical end 11 and the second spherical end 12 and the first ball socket 21 and the second ball socket 31. Therefore, the durability of the connection structure between the tail column 1 and the swing beam 3 and the base 2 is enhanced.

[0039] Furthermore, the cross-section of the guide channel 22 is trapezoidal, and the height of the solid lubricating block 23 is greater than the height of the trapezoid. The cross-section of the guide channel 22 is trapezoidal, specifically a trapezoid that is narrower at the top and wider at the bottom. The solid lubricating block 23 has the same shape, and its height is greater than the trapezoid. Therefore, the first spherical end 11 and the second spherical end 12 abut against the solid lubricating block 23, and the solid lubricating block 23 bears the main friction force. Therefore, the wear on the first spherical end 11, the second spherical end 12, and the solid lubricating block 23 is relatively small.

[0040] Furthermore, several sets of disc spring assemblies 5 are fixedly provided at the bottom of the first ball socket 21. Each disc spring assembly 5 includes several butterfly springs, and the first spherical end 11 abuts against the disc spring assembly 5. Since the first ball socket 21 is the bottom abutting part of the tail post 1, fixing the disc spring assembly 5 at the bottom of the first ball socket 21 by welding, bonding, or snapping can significantly reduce the force directly received by the first ball socket 21. The disc spring assembly 5 can convert the received force into deformation storage, reducing the force directly received by the first ball socket 21. And since the disc spring assembly 5 is formed by stacking disc springs, it can withstand greater pressure.

[0041] Furthermore, the inner walls of the first socket 21 and the second socket 31 are clad with a Co-based alloy layer, the thickness of which is 1-2 mm. The Co-based alloy layer has properties such as high temperature resistance, wear resistance, and corrosion resistance. The cladding process involves melting the relevant material with a laser and covering it onto the surface of the target object to form a protective layer of the relevant material. Therefore, the first socket 21 and the second socket 31 have better durability.

[0042] Furthermore, the upright plate 4 has a connecting hole 41. The first pin and the second pin are respectively interference-fitted with the connecting hole 41. The through-hole size on the first ball socket 21 and the second ball socket 31 is larger than the size of the first pin and the second pin. By heating the upright plate 4, the connecting hole 41 is enlarged, while the first pin and the second pin remain unchanged. Thus, when the first pin and the second pin are inserted into the connecting hole 41, and the upright plate 4 cools down, the first pin and the second pin form an interference fit with the connecting hole 41. Therefore, the first pin, the second pin and the connecting hole 41 are relatively immovable. However, the through-hole size on the first ball socket 21 and the second ball socket 31 is larger than the size of the first pin and the second pin. Therefore, the first ball socket 21 and the second ball socket 31 can rotate along the first pin and the second pin.

[0043] Furthermore, a rubber sealing ring 7 is provided at the edge of the first ball socket 21. The outer circle of the rubber sealing ring 7 is fixedly connected to the edge of the first ball socket 21, and the inner circle of the rubber sealing ring 7 abuts against the first spherical end 11. In the coal mining site, there is a large amount of smoke and dust and broken coal. Therefore, the shape of the first ball socket 21 makes it easy for impurities to enter, which increases the friction between the first ball socket 21 and the first spherical end 11 and causes greater wear to the first ball socket 21 and the first spherical end 11. The outer circle of the rubber sealing ring 7 is fixedly connected to the edge of the first ball socket 21 by means of bonding, snapping, or screwing. When impurities fall onto the rubber sealing ring 7, the rotation of the tail column 1 can lift and drop the impurities.

[0044] Furthermore, the rubber sealing ring 7 is filled with high-temperature grease. In order to further reduce the friction between the first ball socket 21 and the first spherical end 11, the rubber sealing ring 7 is filled with high-temperature grease. Moreover, even if dust or other impurities drift into the space between the first ball socket 21 and the first spherical end 11, the high-temperature grease can wrap the dust and other impurities, without affecting the friction between the first ball socket 21 and the first spherical end 11.

[0045] Example 2:

[0046] Reference Figure 5 The difference between this embodiment and Embodiment 1 is that the first pin and the second pin adopt a split structure and have an anti-loosening structure, as detailed below.

[0047] In this embodiment, the first and second pins adopt a split structure, including a main pin and a detachable pin head. The pin head is connected to the main pin via threads. The split structure of the first and second pins allows them to be divided into different parts. The main pin and the detachable pin head are connected by threads, and the pin head and the main pin respectively abut against the upright plates 4 on both sides, which can fix the pin head and the main pin more tightly and limit the axial displacement of the first and second pins.

[0048] Furthermore, an anti-loosening groove 6 is provided at the end of the main pin shaft away from the pin head. An anti-loosening element 42 is provided on the vertical plate 4 corresponding to the anti-loosening groove 6. The two free ends of the anti-loosening element 42 can be engaged in the anti-loosening groove 6, restricting the circumferential rotation of the first and second pin shafts. The anti-loosening groove 6 is a straight groove symmetrically arranged along the end of the main pin shaft. The anti-loosening element 42 has a semi-circular main body and two straight free ends. The middle position of the semi-circular main body is rotatably fixed on the vertical plate 4 in a direction perpendicular to the vertical plate 4. When the anti-loosening element 42 is engaged in the anti-loosening groove 6, the first and second pin shafts are restricted from rotating, thus forming an integral part with the vertical plate 4.

[0049] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A connection structure for a top coal caving transition hydraulic support, characterized in that: It includes a tail column (1) and a base (2) and a swing beam (3) respectively rotatably connected to both ends of the tail column (1); The tail column (1) has a first spherical end (11) and a second spherical end (12) at its two ends. The base (2) is provided with a first ball socket (21) and the swing beam (3) is provided with a second ball socket (31). The first ball socket (21) and the second ball socket (31) are provided with upright plates (4) on both sides. The first spherical end (11) is located between the two upright plates (4) of the first ball socket (21) and abuts against the first ball socket (21). The first pin passes through the first spherical end (11) and the two upright plates (4) of the first ball socket (21). The second spherical end (12) is located between the two upright plates (4) of the second ball socket and abuts against the second ball socket (31). The second pin passes through the second spherical end (12) and the two upright plates (4) of the second ball socket (31). The inner walls of the first ball socket (21) and the second ball socket (31) are provided with a plurality of guide grooves (22), and a plurality of solid lubricating blocks (23) are embedded in the guide grooves (22).

2. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: The cross-section of the guide groove (22) is trapezoidal, and the height of the solid lubricating block (23) is higher than the height of the trapezoid.

3. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: The bottom of the first ball socket (21) is also fixed with several sets of disc spring groups (5), the disc spring group (5) includes several disc springs, and the first ball end (11) abuts against the disc spring group (5).

4. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: The inner walls of the first socket (21) and the second socket (31) are coated with a Co-based alloy layer, the thickness of which is 1-2 mm.

5. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: The upright plate (4) is provided with a connection hole (41); The first pin and the second pin are respectively press-fitted with the connecting hole (41), and the through hole size on the first ball socket (21) and the second ball socket (31) is larger than the size of the first pin and the second pin.

6. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: The first and second pins adopt a split structure, including a main pin and a detachable pin head, wherein the pin head is connected to the main pin by a thread.

7. The connection structure of the top coal caving transition hydraulic support as described in claim 6, characterized in that: The main pin has an anti-loosening groove (6) at the end away from the pin head. The vertical plate (4) corresponding to the anti-loosening groove (6) has an anti-loosening component (42). The two free ends of the anti-loosening component (42) can be inserted into the anti-loosening groove (6) to restrict the circumferential rotation of the first pin and the second pin.

8. The connection structure of the top coal caving transition hydraulic support as described in claim 1, characterized in that: A rubber sealing ring (7) is provided at the edge of the first ball socket (21). The outer circle of the rubber sealing ring (7) is fixedly connected to the edge of the first ball socket (21), and the inner circle of the rubber sealing ring (7) abuts against the first spherical end (11).

9. The connection structure of the top coal caving transition hydraulic support as described in claim 8, characterized in that: The rubber seal (7) is filled with high-temperature grease.

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