Coal mine underground coal slurry dredging machine and transmission chain and transmission device thereof

Abstract

This utility model provides a coal sludge dredging machine for underground coal mines, its transmission chain, and transmission device, relating to the field of chain technology. It includes: multiple chain link structures, and a pin assembly for sequentially hinged to the multiple chain link structures. Each chain link structure includes a chain plate and a guide sleeve, with guide holes in the guide sleeve and chain plate coaxially arranged. The pin assembly passes through the inner wall of the guide sleeve to sequentially hinge the chain plates of each chain link structure. The working surface of each chain link structure is provided with a reinforcing structure; the working surface includes the working cut surface of the chain plate and / or the working wall of the guide sleeve. This utility model strengthens the strength and wear resistance of the transmission chain by providing a reinforcing structure to the working surface of the chain link structure, solving the problems of wear, breakage, and short lifespan of the transmission chain.

Description

Technical Field

[0001] This utility model relates to the field of chain technology, and in particular to a coal mine underground coal sludge dredging machine and its transmission chain and transmission device. Background Technology

[0002] The current scraper excavator (cleaning machine) mainly consists of: a trench, a transmission device, a wear-resistant bottom section, a guide rail section, and a control cabinet. Among these, the transmission device is a very important part, especially the drive chain, which directly affects the difficulty of underground production and maintenance.

[0003] Cleaning machines typically operate in damp, dusty underground mines, a harsh environment that easily leads to chain wear. Furthermore, the density and particle size of coal slime vary significantly across different mining areas. For example, the coal slime density at Yili No. 1 and No. 4 mines is relatively low (<1.4) and the particles are fine; while the coal slime density at Yanjiahe Coal Mine is higher (1.6), containing more rock powder and large particles, which places higher demands on the chain's wear resistance. In some mining areas, cleaning machines need to operate continuously for extended periods, increasing the accumulation of chain wear.

[0004] However, replacing chains in an underground environment is an extremely complex and time-consuming task, requiring significant manpower and resources and severely impacting production. Therefore, extending chain lifespan and reducing or even eliminating the need for underground chain replacements has become an urgent problem to solve. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and to disclose a coal mine underground coal sludge dredging machine and its transmission chain and transmission device.

[0006] In a first aspect, embodiments of the present invention provide a transmission chain, comprising: a plurality of link structures, and a pin assembly for sequentially hinged to the plurality of link structures; the link structure includes a chain plate and a guide sleeve, the guide holes of the guide sleeve and the chain plate being coaxially arranged, and the pin assembly being used to sequentially hinge the chain plates of each link structure through the inner wall of the guide sleeve; wherein, the working surface of the link structure is provided with a reinforcing structure; the working surface includes the working cut surface of the chain plate and / or the working wall of the guide sleeve.

[0007] In conjunction with the first aspect, this utility model embodiment also provides a first implementation of the first aspect, wherein when the working surface is the working wall of the guide sleeve, the guide sleeve includes a first working wall, which is the outer wall of the guide sleeve; wherein the reinforcing structure includes a first reinforcing layer, which is disposed on the outside of the first working wall, and the outer diameter of the first reinforcing layer is larger than the outer diameter of the chain plate.

[0008] In conjunction with the first aspect, this utility model embodiment also provides a second implementation of the first aspect, wherein the guide sleeve further includes a second working wall, which is the inner wall of the guide sleeve; the reinforcing structure further includes a second reinforcing layer, which is disposed on the inner wall of the second working wall; wherein the reinforcing structure further includes a filler, which is disposed on the inner wall of the guide hole of the chain plate; and the filler and the guide hole of the chain plate are an integral structure; the inner wall of the filler is adapted to the inner wall of the second reinforcing layer.

[0009] In conjunction with the first aspect, this utility model embodiment also provides a third implementation of the first aspect, wherein the first reinforcing layer and / or the second reinforcing layer are integrally formed with the guide sleeve.

[0010] In conjunction with the first aspect, this utility model embodiment also provides a fourth implementation of the first aspect, wherein when the working surface is the working cut surface of the chain plate, the reinforcing structure includes a plurality of reinforcing points spaced apart on the working cut surface; the reinforcing points are generated by a gas carbonitriding heat treatment process.

[0011] In conjunction with the first aspect, this utility model embodiment also provides a fifth implementation of the first aspect, wherein when the working surface is the working cut surface of the chain plate, the reinforcing structure includes a chain plate extension structure; the chain plate extension structure is disposed on the side of the chain plate away from the guide hole, and the chain plate extension structure and the chain plate are an integral structure.

[0012] In conjunction with the first aspect, this utility model embodiment also provides a sixth implementation of the first aspect, wherein the pin assembly, chain plate, and guide sleeve are respectively generated by a preset heat treatment process; wherein the heat treatment process of the chain plate includes: salt bath furnace heating and quenching, and nitrate furnace tempering process; the heat treatment process of the guide sleeve and pin assembly includes: gas carbonitriding heat treatment process.

[0013] Secondly, embodiments of the present invention provide a transmission device, including a sprocket and a transmission chain of any of the above embodiments; the transmission chain is used to transmit power to the sprocket through a plurality of link structures.

[0014] In conjunction with the second aspect, this utility model embodiment also provides a first implementation of the second aspect, wherein the chain socket of the sprocket is provided with an extension layer, the extension layer is connected to the top of the teeth of the sprocket, and forms an extension chain socket structure, the diameter of the extension chain socket structure being larger than the diameter of the chain socket of the sprocket.

[0015] Thirdly, this utility model provides a coal mine underground coal slime dredging machine, which is equipped with the transmission device of any of the above embodiments.

[0016] The present invention provides the following beneficial effects: a coal mine underground coal slime cleaning machine and its transmission chain and transmission device, which strengthens the strength and wear resistance of the transmission chain by setting a reinforcing structure on the working face of the chain link structure, thereby solving the problems of transmission chain wear, breakage and short life. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a transmission chain provided in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a chain plate of a transmission chain provided in an embodiment of the present utility model.

[0020] Illustration: 1-Chain plate; 2-Guide sleeve; 3-Pin assembly; 4-Guide hole; 5-Working surface of the chain plate. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] To solve the above-mentioned technical problems, this utility model provides a coal mine underground coal slime dredging machine and its transmission chain and transmission device.

[0023] To facilitate understanding, the transmission chain provided by this utility model will be described first. Figure 1 A schematic diagram of a transmission chain provided in an embodiment of this utility model is shown below. Figure 1 The transmission chain includes: multiple chain link structures, and a pin assembly 3 for sequentially hinged together the multiple chain link structures; each chain link structure includes a chain plate 1 and a guide sleeve 2, the guide sleeve 2 and the guide hole 4 of the chain plate 1 are coaxially arranged, and the pin assembly 3 is used to pass through the inner wall of the guide sleeve 2 to sequentially hinge together the chain plate 1 of each chain link structure.

[0024] Among them, scraper excavators widely use multi-link articulated transmission chains, whose basic structure includes multiple chain link structures and pin shaft assemblies 3 for sequentially hinged to each chain link. Each chain link structure typically consists of a chain plate 1 and a guide sleeve 2. This utility model embodiment improves the service life of this type of chain. In specific implementation, the working surface of the chain link structure in this utility model embodiment is provided with a reinforcing structure. This utility model embodiment upgrades the chain by providing a reinforcing structure to the working surface of the chain link structure. In specific implementation, the working surface of the chain link structure includes the working cut surface 5 of the chain plate 1 and / or the working wall of the guide sleeve 2. Specifically, the chain is prone to wear at the contact position corresponding to the chain plate 1, that is, the working cut surface 5, such as the arc and the tangent of the outer side of the chain plate 1. This position wears out first, the distance between the hole wall and the tangent point becomes thinner, leading to breakage. Therefore, this utility model embodiment considers reinforcing this working surface. Furthermore, this embodiment also considers enhancing the strength and wear resistance of the guide sleeve 2; therefore, a reinforcing structure is also considered for the working wall of the guide sleeve 2. This ensures that any working surface of the transmission chain is reinforced through a corresponding reinforcing structure, thus solving the problems of transmission chain wear, breakage, and short lifespan.

[0025] Furthermore, based on the above embodiments, this utility model embodiment also provides another transmission chain, wherein when the working surface is the working wall of the guide sleeve 2, the guide sleeve 2 includes a first working wall, which is the outer wall of the guide sleeve 2; wherein the reinforcing structure includes a first reinforcing layer, which is disposed on the outside of the first working wall, and the outer diameter of the first reinforcing layer is larger than the outer diameter of the chain plate 1. The outer diameter of the guide sleeve 2 can be increased by the first reinforcing layer to improve the wear resistance of the outer wall of the guide sleeve 2. In one embodiment, after adding the first reinforcing layer, the overall outer diameter of the guide sleeve 2 can be larger than the outer diameter of the chain plate 1, reducing the possibility of the chain plate 1 directly contacting external wear sources and further protecting the chain plate 1.

[0026] Furthermore, the guide sleeve 2 also includes a second working wall, which is the inner wall of the guide sleeve 2; the reinforcing structure also includes a second reinforcing layer, which is disposed on the inner wall of the second working wall. In this embodiment, the second reinforcing layer is also provided on the inner side of the inner wall of the guide sleeve 2. This second reinforcing layer allows for a reduction in the inner diameter of the guide sleeve 2. Combined with the aforementioned first reinforcing layer, this increases the overall cross-sectional area of ​​the guide sleeve 2, enhancing its wear resistance and fatigue resistance. Furthermore, both the first and second reinforcing layers can be integrally integrated with the guide sleeve 2. When both are integrally integrated with the guide sleeve 2, the overall material of the guide sleeve 2 increases, making it more robust under high loads and high wear, thus extending its service life. In addition, the integrated design avoids the bonding problems between different materials, improving the consistency and stability of the overall structure. In one embodiment, the outer diameter of the guide sleeve 2 can be increased by 2 mm by the first reinforcing layer, for example, the first reinforcing layer is 2 mm; the inner diameter of the guide sleeve 2 can also be reduced by 2 mm by the second reinforcing layer, for example, the second reinforcing layer is 2 mm.

[0027] Correspondingly, when designing a second reinforcing layer on the inner wall of the guide sleeve 2, the present invention also designs the structure of the chain plate 1 accordingly. For example, the reinforcing structure of the present invention also includes a filler, which is disposed on the inner wall of the guide hole 4 of the chain plate 1; that is, the filler is designed to fit the inner wall of the second reinforcing layer onto the guide hole 4 of the chain plate 1. In one embodiment, the filler and the guide hole 4 of the chain plate 1 are an integral structure, that is, the guide hole 4 of the chain plate 1 can be reduced in size to ensure that the guide hole 4 of the chain plate 1 can cooperate with the adopted pin assembly 3, reducing gaps and reducing friction and wear. In one embodiment, based on the above-mentioned second reinforcing layer being 2mm thick, the inner diameter of the guide hole 4 of the chain plate 1 is reduced by 2mm based on the above-mentioned filler. Under this premise, the cross-sectional material of the chain plate 1 can also be increased accordingly, which can effectively compensate for the structural strength of the chain plate 1 to a certain extent, so as to better withstand the stress and fatigue caused by long-term continuous operation and extend the service life.

[0028] Correspondingly, based on the aforementioned reinforcing structure, the selected pin assembly 3 has a reduced diameter, such as 2mm. However, this embodiment of the invention refines and optimizes the dimensions and structure of key components of the transmission chain through reinforcing structures, achieving a "robbing Peter to pay Paul" approach to material redistribution and performance improvement without sacrificing overall strength and function. Although the dimensions of the pin assembly 3 used in this embodiment of the invention have changed, its basic function as a chain guiding structure is retained, and by setting reinforcing structures in key areas, the overall wear resistance, fatigue resistance, and operational stability of the chain are comprehensively improved.

[0029] Furthermore, this embodiment of the invention also designs special materials or heat treatment processes for each key component to ensure or enhance the strength and wear resistance of each component. Specifically, the pin assembly 3, chain plate 1, and guide sleeve 2 are generated through a preset heat treatment process. In one embodiment, to prevent oxidation and decarburization of the chain plate 1 during heat treatment, and to prevent differences in mechanical properties caused by uneven heating and resulting microstructure, the heat treatment process for the chain plate 1 includes: salt bath furnace heating and quenching, followed by tempering in a nitrate furnace, to ensure the quality of the heat treatment of the chain plate 1. In addition, the chain plate 1 can be made of 40CrMo material with a hardness of HRC38-40 and a bluing treatment. To improve the surface hardness and wear resistance of the sleeve and pin, while ensuring sufficient strength and toughness in the core, the heat treatment process for the guide sleeve 2 and pin assembly 3 includes: a gas carbonitriding chemical heat treatment process. In addition, the guide sleeve 2 and the pin assembly 3 can be made of 40Cr or 20CrMnT, with a surface hardness of HRC55-60 and a core hardness of HRC35-40.

[0030] Furthermore, when the working surface is the working cut surface 5 of the chain plate 1, the reinforcing structure may include an extension structure of the chain plate 1; the extension structure of the chain plate 1 is located on the side of the chain plate 1 away from the guide hole 4, and the extension structure of the chain plate 1 and the chain plate 1 are an integral structure. That is, the chain plate 1 can be thickened by the extension structure of the chain plate 1, increasing the contact area with the guide channel and extending the service life of the chain plate 1. The working cut surface 5 of the chain plate 1 is a preset width range, such as 30mm, at the tangent point between the arc of the chain plate 1 and the bottom surface of the chain plate 1 (i.e., the tangent line between the arc and the outer surface of the aforementioned easily worn chain plate 1). Figure 2 A structural schematic diagram of the chain plate 1 is shown, including the working section 5 region. (Refer to...) Figure 2 Corresponding reinforcement structures can be set for the working section 5 area of ​​the chain plate 1 shown in the figure, as well as the corresponding area that turns to the bottom surface of the chain plate 1.

[0031] Furthermore, to reduce costs, the thickness of the chain plate 1 can be kept constant by selecting a better material for the chain plate 1 and employing a special heat treatment process, particularly a 30mm width at the tangent point between the arc and the bottom surface of the chain plate 1. In practical implementation, the aforementioned reinforcing structure can include multiple spaced reinforcing points on the working cut surface 5, which can specifically improve the wear resistance of key wear areas without significantly increasing the overall weight of the chain plate 1. In practical implementation, the working cut surface 5 of the chain plate 1 can be nitrided at 5mm intervals, using point nitrogen hardening to improve its wear resistance, ensuring both the internal toughness of the chain plate 1 and high wear resistance.

[0032] The reinforcement points are generated using a gas carbonitriding heat treatment process. This not only effectively disperses and absorbs the impact load and alternating stress experienced by the chain plate 1 during operation, reducing the risk of failure due to excessive local wear or fatigue fracture, but the spaced reinforcement points also provide local reinforcement, effectively enhancing the wear resistance of the contact area between the chain plate 1 and the sprocket. This significantly increases the surface hardness of this part (typically reaching HRC55-60), ensuring that it can maintain good condition under high load and long-term continuous operation, which helps to achieve the goal of "no surfacing for three years and no maintenance for three years".

[0033] In summary, when the chain plate 1 wears down after contact with the guide rail (track), a "protrusion" will appear on the guide rail (track). Based on this invention, the guide sleeve 2 will contact the "protrusion". Based on the above structure and corresponding special material selection and heat treatment, the diameter and strength of the guide sleeve 2 are increased, and its service life is extended. Simultaneously, based on the transmission chain structure of this invention, the guide sleeve 2 supports the chain plate 1, preventing further wear on the side (bottom) of the chain plate 1, which only moves within its own track groove. Therefore, this invention can effectively solve the problem of continued wear at the wear location of the chain plate 1 (within a 30mm range at the tangent point), effectively extending the service life of the chain plate 1.

[0034] In summary, the transmission chain provided by this embodiment of the invention features a reinforced structure on the working surface of the guide sleeve 2, enhancing its structural strength. Furthermore, by correspondingly reducing the inner diameter of the guide hole 4 in the chain plate 1, the material thickness in the surrounding area can be increased, improving the cross-sectional area and structural strength of the chain plate 1. Additionally, the diameter of the pin assembly 3 is also appropriately reduced to free up space, allowing for the arrangement of reinforcement structures in other critical areas. Based on this, by weakening non-critical parts and strengthening critical wear areas, a synergistic reinforcement mechanism is formed among the components, achieving both lightweight and high performance in the overall structure. This invention, through a "material redistribution" strategy, not only avoids weakening the strength of the chain plate 1 but also substantially strengthens its critical stress-bearing parts.

[0035] In conjunction with the above embodiments, this utility model also provides a transmission device, which includes a sprocket and a transmission chain of any of the above embodiments; the transmission chain is used to drive the sprocket through a plurality of the chain link structures.

[0036] To improve the service life of the transmission device, this invention, while keeping the pitch of the chain plate 1 unchanged, adds an extension layer to the chain socket of the sprocket. This extension layer connects with the top of the sprocket teeth to form an extended chain socket structure. In specific implementation, this invention optimizes the fit between the sprocket and the chain. By forming the extended chain socket structure (i.e., adjusting the sprocket chain socket), it improves meshing stability and wear resistance, and eliminates concerns about transmission abnormalities. In this invention, the diameter of the extended chain socket structure is larger than the diameter of the sprocket chain socket. Under low-speed, heavy-load conditions, this invention ensures stable root transmission of the sprocket, meeting the power transmission requirements of the cleaning machine while reducing the high-precision matching requirements for the sprocket tooth profile and chain pitch. By adjusting the sprocket structure, the service life of the chain is extended, ensuring the overall service life of the transmission device.

[0037] Furthermore, since the sprockets are bolted on, replacement is relatively convenient. When the sprockets are partially worn or damaged, the structural arrangement of this embodiment allows for quick online replacement without the need for complete equipment disassembly. Because the sprockets can be replaced online, the chain can tolerate some degree of localized wear or slight deformation; while ensuring basic transmission functionality, the chain's service life is appropriately extended, effectively increasing its lifespan. This significantly reduces the frequency and difficulty of replacing chains underground, supporting the engineering goal of "three years without surfacing and three years without maintenance."

[0038] Furthermore, based on the above embodiments, this utility model embodiment also provides a coal mine underground coal slime dredging machine, which is equipped with the transmission device of the above embodiments. The coal mine underground coal slime dredging machine provided in this utility model embodiment has the same technical features as the transmission device and transmission chain provided in the above embodiments, and therefore can solve the same technical problems and achieve the same technical effects. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of this coal mine underground coal slime dredging machine can be referred to the corresponding process in the foregoing embodiments, and will not be repeated here. In addition, in the description of this utility model embodiment, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A drive chain, characterized in that The transmission chain includes: a plurality of chain link structures, and a pin assembly for sequentially hinged the plurality of chain link structures; the chain link structure includes a chain plate and a guide sleeve, the guide sleeve and the guide hole of the chain plate are coaxially arranged, and the pin assembly is used to pass through the inner wall of the guide sleeve to sequentially hinge the chain plate of each chain link structure; The working surface of the chain link structure is provided with a reinforcing structure; the working surface includes the working cut surface of the chain plate and / or the working wall of the guide sleeve.

2. The transmission chain according to claim 1, characterized in that When the working surface is the working wall of the guide sleeve, the guide sleeve includes a first working wall, which is the outer wall of the guide sleeve; The reinforcing structure includes a first reinforcing layer, which is disposed on the outer side of the first working wall, and the outer diameter of the first reinforcing layer is larger than the outer diameter of the chain plate.

3. The transmission chain according to claim 2, characterized in that The guide sleeve further includes a second working wall, which is the inner wall of the guide sleeve; the reinforcing structure further includes a second reinforcing layer, which is disposed on the inner wall of the second working wall. The reinforcing structure further includes a filler, which is disposed on the inner wall of the guide hole of the chain plate; and the filler and the guide hole of the chain plate are an integral structure. The inner wall of the filler is adapted to the inner wall of the second reinforcing layer.

4. A transmission chain according to any one of claims 2 or 3, characterised in that, The first reinforcing layer and / or the second reinforcing layer are integral with the guide sleeve.

5. The transmission chain of claim 1 wherein, When the working surface is the working cut surface of the chain plate, the reinforcing structure includes a plurality of reinforcing points spaced apart on the working cut surface; The reinforcing points are generated using a gas carbonitriding heat treatment process.

6. The transmission chain of claim 1 wherein, When the working surface is the working cross-section of the chain plate, the reinforcing structure includes a chain plate extension structure; The chain plate extension structure is disposed on the side of the chain plate away from the guide hole, and the chain plate extension structure and the chain plate are an integral structure.

7. The transmission chain of claim 1 wherein, The pin assembly, the chain plate, and the guide sleeve are each manufactured through a preset heat treatment process; The heat treatment process of the chain plate includes: salt bath furnace heating and quenching, and nitrate furnace tempering. The heat treatment process for the guide sleeve and the pin assembly includes: a gas carbonitriding heat treatment process.

8. A transmission device, characterized in that, The system includes a sprocket and a drive chain as described in any one of claims 1 to 7; the drive chain is used to drive the sprocket through a plurality of the said link structures.

9. The transmission of claim 8, wherein, The sprocket has an extension layer in its chain socket. The extension layer connects with the top of the sprocket teeth to form an extended chain socket structure. The diameter of the extended chain socket structure is larger than the diameter of the sprocket's chain socket.

10. An underground coal mine slurry dredger characterised in that, The device is provided with the transmission device as described in any one of claims 8-9.

Images