Scraper pushing seat low in damage rate and easy to maintain

Abstract

The invention discloses a scraper pushing seat low in damage rate and easy to maintain. Belongs to the technical field of mining equipment. The device comprises at least two bottom plates, the bottom plates are arranged in parallel; a plurality of sets of stand columns are installed on the upper side of the bottom plate. Each group of stand columns are connected through a cross beam; a supporting table is arranged at the upper top of the stand column; a machine base is detachably installed on the supporting table. The projection of the machine base on the horizontal plane is overlapped with the corresponding bottom plate below; connecting plates are installed on the opposite side walls of every two adjacent machine bases. A roller support of the scraper is detachably mounted on the connecting plate; the pushing seat effectively solves the problems that a traditional pushing seat of the scraper is poor in deformation resistance, serious in stress concentration, high in maintenance cost, too large in connection rigidity, namely insufficient in installation precision.

Description

Technical Field

[0001] The present invention relates to the technical field of mining equipment and devices, and particularly relates to a scraper conveyor push seat with a low damage rate and easy maintenance. Background Art

[0002] As the core transportation equipment in the fully mechanized coal mining face of a coal mine, the reliability and maintenance convenience of the push seat of the scraper conveyor directly affect the coal mining efficiency; the traditional push seat generally adopts an integral welded structure, and its bottom plate structure is single, and it is prone to plastic deformation during frequent pushing operations, resulting in the deviation of the installation position, accelerating the wear of the scraper chain; in addition, fatigue cracks are likely to occur at each weld of the whole under impact load, leading to structural fracture; and for local damage, the whole needs to be replaced, resulting in a long shutdown time and serious waste of spare parts; lacking a flexible connection mechanism, misalignment is likely to occur when the force is uneven, exacerbating the running deviation of the roller; it is difficult to adjust the installation position, resulting in frequent problems of the scraper chain running off; and this is also the main problem to be solved at present. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a scraper conveyor push seat with a low damage rate and easy maintenance, so as to solve the problems of poor anti-deformation ability, serious stress concentration, high maintenance cost, excessive connection rigidity and insufficient installation accuracy existing in the traditional scraper conveyor push seat.

[0004] To solve the above problems, the present invention provides the following technical solutions: A scraper conveyor push seat with a low damage rate and easy maintenance; it includes at least two bottom plates; the bottom plates are arranged in parallel; a number of groups of columns are installed on the upper side of the bottom plates; the columns in each group are connected by cross beams; a support platform is arranged at the upper top of the columns; a machine base is detachably installed on the support platform; the projection of the machine base on the horizontal plane overlaps with the corresponding bottom plate below; connecting plates are installed on the opposite side walls of two adjacent machine bases; and a roller support of the scraper conveyor is detachably installed on the connecting plates.

[0005] Preferably, the bottom plate includes a horizontal strip-shaped plate; inclined plates that tilt upward are arranged at the front and rear end sides of the strip-shaped plate; a pair of vertical plates are arranged along the length direction of the strip-shaped plate; the two ends of the vertical plates are correspondingly connected to the inclined plates; and the columns are arranged between the two vertical plates.

[0006] Further, the column has a structure that is wider at the lower side and narrower at the upper side, and a fillet is provided at the position where the width changes between the upper and lower sides; the two ends of the lower side of the column are respectively welded and fixed to the end faces of the vertical plates.

[0007] Preferably, a reinforcing rib plate is further arranged between the column and the strip-shaped plate of the bottom plate.

[0008] Preferably, the upper top of the support platform is a horizontal plane; the machine base is an I-shaped steel structure; positioning holes are provided at both sides of the bottom of the machine base corresponding to the support platform, and the machine base and the support platform are detachably connected through bolt assemblies at the positioning holes.

[0009] Furthermore, the top flat plate of the machine base is narrower than the bottom flat plate; several reinforcing ribs are also provided between the upper and lower planes of the base.

[0010] Preferably, the length of the machine base is greater than the length of the bottom plate, and mating connecting ear plates are respectively provided at the front and rear ends of the machine base; through holes are provided on the connecting ear plates; the front and rear machine bases are hinged at the connecting ear plates.

[0011] Preferably, the connecting plate is a cantilever-shaped flat plate member with one end connected to the side wall of the machine base and the other end extending horizontally outwards; the distances between the connecting plates are the same; positioning holes are provided on the connecting plate; both sides of the roller support are detachably mounted on the corresponding two connecting plates through bolt assemblies.

[0012] Preferably, a backing plate is provided between the lower side of the connecting plate and the bottom flat plate of the machine base; when the roller support is mounted on the connecting plate, the backing plate does not interfere with the bolt assembly of the roller support. [[ID=1))

[0013] The beneficial effects of the present invention are reflected in the following aspects: 1. The bottom plate adopts a combined structure to form an integral reinforced frame, greatly enhancing the stiffness of the bottom plate itself and the ability to resist plastic deformation, effectively preventing the deformation of the bottom plate caused by frequent pushing and the resulting offset of the roller support installation position; the column adopts a variable cross-section design with a wider bottom and a narrower top and has a rounded corner at the variable cross-section, combined with the welding fixation of the lower end of the column and the end face of the vertical plate, and the additional reinforcing rib plates, greatly optimizing the stress distribution in the connection area between the column and the bottom plate, significantly improving the load-bearing capacity and stability of the overall structure; the machine base adopts an I-shaped steel structure and is internally provided with reinforcing ribs, further enhancing the stiffness and strength of the machine base itself, ensuring its reliability as a key load-bearing component; 2. The variable cross-section of the column with a wider bottom and a narrower top combined with the rounded corner design smoothly transitions the cross-section change, effectively avoiding the serious stress concentration problem caused by the sharp transition at the traditional right-angle welding joint, significantly reducing the risk of fatigue cracks generated at the weld under impact loads; the welding method of the column and the end face of the vertical plate, combined with the reinforcing rib plates, transfers the load more evenly to the bottom plate frame, further dispersing the stress and reducing the local high-stress area; 3. The machine base is detachably mounted on the support platform through bolt assemblies, and the roller support is detachably mounted on the connecting plate through bolt assemblies; this modular design enables key components such as the machine base and the roller support to be replaced with damaged single components only when they are partially damaged, without the need to replace the entire pushing seat as a whole or perform large-area cutting and welding; this greatly shortens the equipment downtime for maintenance and significantly reduces the spare part cost and manual maintenance cost; even if the support structures such as the bottom plate, columns, and cross beams are partially damaged, targeted repair or replacement can be achieved, avoiding the drawback of the traditional integral welding structure that "a slight move affects the whole body". 4. The length of the machine base is greater than that of the bottom plate, and the front and rear machine bases are hinged through connecting ear plates; this design introduces a flexible connection mechanism between adjacent machine bases, allowing adjacent machine bases to have slight relative rotation or displacement when the bottom plate is unevenly stressed or the ground is uneven, effectively avoiding the problems of machine base misalignment and jamming caused by traditional rigid connections, thereby reducing the risk of roller running skew. 5. The roller support is detachably mounted on the connecting plate through bolts, and the distances between the connecting plates are consistent; this design makes the installation position of the roller support adjustable, enabling more precisely ensuring the parallelism of the axes and the consistency of the installation heights of multiple rollers, fundamentally solving the problem of the scraper chain running deviation caused by installation position deviation; the setting of the backing plate ensures that the connecting plate has sufficient support strength and stiffness, avoiding its deflection and deformation due to bearing the load of the roller support, and further ensuring the installation accuracy. Description of the Drawings

[0014] Figure 1 is the structural schematic diagram of the inventive device in this embodiment; Figure 2 is Figure 1 the sectional view of the device in the A-A direction in Description of the Reference Numerals: 1. Base, 2. Column, 3. Cross Beam, 4. Support Platform, 5. Machine Base, 6. Connecting Plate, 7. Roller Support, 8. Reinforcing Rib Plate, 9. Reinforcing Rib, 10. Connecting Ear Plate, 11. Backing Plate, 101. Strip Plate, 102. Inclined Plate, 103. Vertical Plate. Detailed Embodiment

[0015] The present invention will be further introduced below in conjunction with the drawings and specific embodiments: Embodiment: Refer to Figure 1, this embodiment provides a scraper conveyor push seat with a low damage rate and easy maintenance; it includes at least two bottom plates 1; the bottom plates 1 are arranged in parallel; several groups of columns 2 are installed on the upper side of the bottom plates 1; the columns 2 in each group are connected by cross beams 3; a support platform 4 is arranged on the upper top of the columns 2; a machine base 5 is detachably installed on the support platform 4; the projection of the machine base 5 on the horizontal plane overlaps with the corresponding bottom plate 1 below; connecting plates 6 are installed on the opposite side walls of two adjacent machine bases 5; a roller support 7 of the scraper conveyor is detachably installed on the connecting plate 6. There are two bottom plates in this embodiment; this modular design significantly improves the structural redundancy of the entire push seat. When a local area is damaged due to overload or impact, the failure range can be effectively controlled within the smallest unit, avoiding the collapse of the overall structure, and at the same time greatly facilitating targeted local repair or replacement.

[0016] The bottom plate 1 includes a horizontal strip plate 101; inclined plates 102 that tilt upward are arranged on the front and rear end sides of the strip plate 101; a pair of vertical plates 103 are arranged on the strip plate 101 along its length direction; both ends of the vertical plates 103 are correspondingly connected to the inclined plates 102; the columns 2 are arranged between the two vertical plates 103. The inclined plates 102 and the vertical plates 103 work together to form a continuous longitudinal constraint boundary on both sides of the strip plate 101, and together with the strip plate 101, they form a load-bearing matrix with high bending and torsional stiffness. This structure can effectively resist the complex alternating bending stress borne by the bottom plate during the pushing process, significantly inhibit the warping deformation trend of the strip plate 101 in the length direction, and ensure the overall flatness of the bottom plate.

[0017] The column 2 has a structure that is wider at the lower side and narrower at the upper side, and a fillet is provided at the position where the width changes between the upper and lower sides; both ends of the lower side of the column 2 are respectively welded and fixed to the end faces of the vertical plates 103. The variable cross-section design of the column 2 with a wider bottom and narrower top makes its bottom have a larger load-bearing area and stiffness, and can more effectively disperse the load transmitted from the machine base 5 to the overall frame structure of the vertical plates 103 and the bottom plate 1. The fillet transition is adopted at the cross-section change, completely eliminating the sharp stress concentration points brought by the traditional right-angle transition, significantly smoothing the stress flow line distribution, and greatly improving the anti-fatigue fracture ability of this key connection area under repeated impact loads. The welding and fixing method of both ends of the column 2 to the end faces of the vertical plates 103 ensures the directness and efficiency of the load transmission path.

[0018] A reinforcing rib plate 8 is also provided between the upright column 2 and the strip plate 101 of the bottom plate 1. The reinforcing rib plate 8 is arranged obliquely or vertically between the side surface of the upright column 2 and the strip plate 101, forming an additional triangular support structure. This can not only further enhance the local stiffness and stability of the root of the upright column 2, effectively resist the possible lateral bending or torsion of the upright column 2, but more importantly, it further disperses the load transmitted by the upright column 2 to the vertical plate 103 and guides it to a larger area of the strip plate 101, optimizing the stress distribution of the entire bottom plate structure and reducing the formation of local high-stress areas.

[0019] The upper top of the support platform 4 is a horizontal plane; the machine base 5 is an I-shaped steel structure; positioning holes are opened at both sides of the bottom of the machine base 5 corresponding to the support platform 4, and the machine base 5 and the support platform 4 are detachably connected through bolt assemblies at the positioning holes. The precision horizontal machining surface at the top of the support platform 4 provides a stable and reliable installation reference for the machine base 5. The setting of the positioning holes ensures that the machine base 5 can be quickly and accurately positioned at the predetermined position every time it is installed. The high-strength bolt assembly connection method realizes the rapid separation and installation of the machine base 5 and the support structure on the premise of ensuring the connection stiffness and reliability, and is the key link for modular maintenance to be realized.

[0020] The top flat plate of the machine base 5 is narrower than the bottom flat plate; a number of reinforcing ribs 9 are also provided between the upper and lower planes of the base 5. The I-shaped steel structure itself has excellent bending resistance. The design with a narrower top flat plate reduces the weight at the top of the machine base 5 and optimizes the stress distribution while ensuring the installation surface requirements of the roller support 7. A number of reinforcing ribs 9 arranged inside are reasonably arranged according to the results of force analysis (such as longitudinally, transversely or crosswise), greatly enhancing the anti-buckling ability of the web of the machine base 5 and the overall stiffness and strength of the I-shaped beam, enabling it to withstand the huge dynamic loads generated by the operation and pushing of the scraper chain without plastic deformation or failure.

[0021] The length of the machine base 5 is greater than the length of the bottom plate 1, and mating connecting ear plates 10 are respectively provided at the front and rear ends of the machine base 5; through holes are opened in the connecting ear plates 10; the front and rear machine bases 5 are hinged at the connecting ear plates. The length of the machine base 5 being greater than that of the bottom plate 1 allows its front and rear ends to extend beyond the range of the bottom plate, providing space for the setting of the connecting ear plates 10. The front and rear machine bases 5 are hinged through a pin shaft passing through the through holes in the connecting ear plates 10. This design creates a controllable flexible joint between adjacent machine bases 5, allowing adjacent machine bases 5 to undergo small relative pitching rotations or slight lateral displacements around the hinge point when subjected to uneven loads. This limited degree of freedom releases the constraint stress inside the structure, effectively avoiding problems such as misalignment, jamming of the machine base and even forced bending and damage of structural components caused by uneven forces in traditional rigid connections, significantly improving the adaptability of the system to adverse working conditions, and thus reducing the risk of roller running skew.

[0022] The connecting plate 6 is a cantilever-shaped flat plate member with one end connected to the side wall of the machine base 5 and the other end extending horizontally outwards; the distances between the respective connecting plates 6 are the same; positioning holes are provided on the connecting plate 6; both sides of the roller support 7 are detachably installed on the corresponding two connecting plates 6 through bolt assemblies. The connecting plate 6 serves as the installation interface for the roller support 7, and its cantilever design provides the necessary installation space. The consistent distances of all the connecting plates 6 ensure the precise alignment of the installation positions of adjacent roller supports 7, laying a benchmark for the subsequent parallel installation of the rollers. The positioning holes provide precise guidance for bolt connection, ensuring the repeated accuracy of the installation position of the roller support 7. By loosening and tightening the connecting bolts, the installation height and horizontal position of the roller support 7 can be finely adjusted within a certain range, thereby finely calibrating the parallelism and levelness of the roller axis, fundamentally solving the problem of the scraper chain running off track caused by cumulative installation errors. The bolt connection method makes the replacement of a single roller support 7 extremely convenient.

[0023] A backing plate 11 is provided between the lower side of the connecting plate 6 and the bottom plate of the machine base 5; when the roller support 7 is installed on the connecting plate, the backing plate 11 does not interfere with the bolt assembly of the roller support 7. The backing plate 11 fills the gap between the lower part of the root of the cantilever of the connecting plate 6 and the bottom plate of the machine base 5, providing a stable lower support for the cantilever-shaped connecting plate 6. This greatly enhances the ability of the connecting plate 6 to resist the vertical load and bending moment transmitted by the roller support 7, effectively preventing the connecting plate 6 from bending downward or vibrating under heavy load, ensuring the long-term stability of the positioning hole position on the connecting plate 6 and the durability of the roller installation accuracy. Its design ensures that the operating space is unobstructed when installing and maintaining the bolts of the roller support 7.

[0024] The working principle of the present invention lies in: After the scraper chain's operation and pushing load acts on the roller support, it is transmitted to the base through the connecting plate. The base's I-steel structure and internal reinforcement ribs effectively bear and disperse the load. The load is then transmitted to the support and column through bolted connections. The column, with its variable cross-section design (wide at the bottom and narrow at the top), rounded corners at the root, and welded fixation to the vertical plates at both ends, efficiently and with low stress concentration transfers the load to the high-rigidity base frame composed of strip plates, tilting plates, and vertical plates. The reinforcing ribs further enhance the stability of the column roots and optimize the distribution of load on the base. When the working surface is uneven or the pushing force is uneven, the adjacent bases can produce slight relative rotation or displacement through their front and rear end hinged connections, releasing the restraining stress, avoiding base misalignment, jamming, or overload damage to the connectors, improving adaptability to complex working conditions, and reducing roller deflection. The modular design is reflected in the following features: the roller supports are removable and replaceable via connecting plate bolts; the machine base is removable and replaceable via support bolts; damaged connecting plates or pads can be replaced individually; even damaged base plates or column units can be repaired or replaced individually, significantly reducing downtime and maintenance costs. The entire structure significantly enhances its resistance to plastic deformation and significantly reduces the risk of fatigue cracking in critical welds under impact loads by eliminating stress concentration points, thereby extending service life, achieving low damage rates, and high reliability. The installation position can be fine-tuned via connecting plate bolts to ensure roller installation accuracy and address scraper chain deviation issues.

[0025] The present invention solves the core problems of the traditional scraper conveyor push seat, such as poor deformation resistance, severe stress concentration, high maintenance cost, excessive connection rigidity and insufficient installation accuracy, by optimizing the base plate structure, column design, key component connection method and adding reinforcement structure. It achieves the goals of low damage rate, long life and easy maintenance, which is of great significance to ensuring the efficient and stable operation of the scraper conveyor.

Claims

1. A scraper conveyor push seat with a low damage rate and easy maintenance, characterized in that: It includes at least two bottom plates (1); the bottom plates (1) are arranged in parallel; several groups of upright columns (2) are installed on the upper side of the bottom plates (1); cross beams (3) are connected between each group of upright columns (2); a support platform (4) is arranged at the upper top of the upright columns (2); a machine base (5) is detachably installed on the support platform (4); the projection of the machine base (5) on the horizontal plane overlaps with the corresponding bottom plate (1) below; connecting plates (6) are installed on the opposite side walls of two adjacent machine bases (5); a roller support (7) of a scraper conveyor is detachably installed on the connecting plate (6).

2. The push seat of the scraper conveyor with low damage rate and easy maintenance according to claim 1, characterized in that: The bottom plate (1) includes a horizontal strip plate (101); inclined plates (102) that tilt upward are arranged at the front and rear end sides of the strip plate (101); a pair of upright plates (103) are arranged on the strip plate (101) along its length direction; both ends of the upright plates (103) are correspondingly connected to the inclined plates (102); the upright columns (2) are arranged sandwiched between the two upright plates (103).

3. The push seat of the scraper conveyor with a low damage rate and easy maintenance according to claim 2, characterized in that: The upright column (2) has a structure that is wider at the lower side and narrower at the upper side, and is provided with rounded corners at the position where the width changes between the upper and lower sides; both ends of the lower side of the upright column (2) are respectively welded and fixed to the end faces of the upright plates (103).

4. The push seat of the scraper conveyor with low damage rate and easy maintenance according to claim 2, characterized in that: Reinforcing rib plates (8) are also arranged between the upright column (2) and the strip plate (101) of the bottom plate (1).

5. A scraper conveyor push seat with a low damage rate and easy maintenance according to claim 1, characterized in that: The upper top of the support platform (4) is a horizontal plane; the machine base (5) is an I-shaped steel structure; positioning holes are opened at the positions corresponding to the support platform (4) on both sides of the bottom of the machine base (5), and the machine base (5) and the support platform (4) are detachably connected through bolt assemblies at the positioning holes.

6. The push seat of the scraper conveyor with a low damage rate and easy maintenance according to claim 5, characterized in that: The top flat plate of the machine base (5) is narrower than the bottom flat plate; several reinforcing ribs (9) are also arranged between the upper and lower planes of the base (5).

7. A scraper conveyor push seat with a low damage rate and easy maintenance according to claim 1, characterized in that: The length of the machine base (5) is greater than the length of the bottom plate (1), and mating connecting ear plates (10) are respectively arranged at the front and rear ends of the machine base (5); through holes are opened in the connecting ear plates (10); the two front and rear machine bases (5) are hinged at the connecting ear plates.

8. A scraper conveyor push seat with low damage rate and easy maintenance according to claim 1, characterized in that: The connecting plate (6) is a cantilever-shaped flat plate member with one end connected to the side wall of the machine base (5) and the other end extending horizontally outwards; the spacing between each connecting plate (6) is the same; positioning holes are opened in the connecting plate (6); both sides of the roller support (7) are detachably installed on the corresponding two connecting plates (6) through bolt assemblies.

9. A scraper conveyor push seat with low damage rate and easy maintenance according to claim 1, characterized in that: A backing plate (11) is arranged between the lower side of the connecting plate (6) and the bottom flat plate of the machine base (5); when the roller support (7) is installed on the connecting plate, the backing plate (11) does not interfere with the bolt assembly of the roller support (7).

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