阅读说明：本技术 一种扁平链环 (Flat chain ring ) 是由 王俊 李振勇 王玉玲 于 2020-09-01 设计创作，主要内容包括：本发明涉及一种扁平链环,属于输送设备技术领域。本发明提供一种新型结构锻造扁平立环,通过调节直臂段结构尺寸,改善其结构强度。同时通过控制扁平立环外宽尺寸,使其可以适应更低的工作空间,使其在具备同等强度等级条件下,进一步减小垂直方向链环高度,实现更高强度输送更大吨位,提高链条使用寿命。进一步,由于扁环中间段为单臂结构,能够有效阻隔扁环连接的两个相邻圆环,避免两个直接接触,从而有效避免链环在使用过程中可能发生的打结现象。(The invention relates to a flat chain ring, and belongs to the technical field of conveying equipment. The invention provides a novel structure forged flat vertical ring, which improves the structural strength by adjusting the structural size of a straight arm section. Meanwhile, the outer width of the flat vertical ring is controlled, so that the flat vertical ring can adapt to a lower working space, the height of the chain ring in the vertical direction is further reduced under the condition of the same strength grade, the higher strength and the larger tonnage are realized, and the service life of the chain is prolonged. Furthermore, because the oblate ring interlude is single armed structure, can effectively separate two adjacent rings that the oblate ring connects, avoid two direct contact to effectively avoid the knotting phenomenon that the chain link probably takes place in the use.)

1. A flat chain ring, characterized in that the flat chain ring is symmetrical left and right along the longitudinal center line and up and down along the transverse center line; the flat chain link comprises: first circular arc section, second circular arc section that are located flat chain ring both ends are located the first side arm section of both sides about the first round hole of flat chain ring, are located the second side arm section of both sides about the second round hole of flat chain ring, are located the interlude at flat chain ring middle part, connect the first changeover portion of first side arm section and interlude, and connect the second changeover portion of second side arm section and interlude, the interlude is the single armed structure.

2. The flat chain ring as claimed in claim 1, wherein said first arc segment and said second arc segment are each: the cross section of the chain link is a circular cross section, and the diameter of the circular cross section equivalent to the cross section area is called the nominal diameter of the flat chain link.

3. The flat chain ring as claimed in claim 2, wherein the first and second side arm segments each have a cross-sectional shape: a semicircular shape, or a cross-sectional shape formed by combining a rectangle and a semicircle; the first round hole and the second round hole are both: round, oval or with semicircular ends and parallel sections in the middle, long closed round, and rounded corners around the hole; the upper surface and the lower surface of the first side arm section are parallel, the ratio of the distance between the upper surface and the lower surface to the equivalent circular section diameter of the section area of the middle symmetrical plane of the first circular arc section is between 2 and 3, and the ratio of the single-side minimum area of the first side arm section to the section area of the middle symmetrical plane of the first circular arc section is between 0.4 and 1; the upper surface and the lower surface of the second side arm section are parallel, the ratio of the distance between the upper surface and the lower surface to the equivalent circular section diameter of the section area of the middle symmetrical plane of the second circular arc section is between 2 and 3, and the ratio of the single-side minimum area of the second side arm section to the section area of the middle symmetrical plane of the second circular arc section is between 0.4 and 1.

4. The flat chain link according to claim 3, wherein the cross-section of the middle section is a rectangle with rounded edges, and the ratio of the smallest area of one side of the first and second side arm sections to the cross-sectional rectangular area of the middle section is between 0.4 and 1.

5. The flat chain ring as claimed in claim 4, wherein the upper and lower sides of the intermediate section are arcuate surfaces that smoothly transition with the arcuate outer surfaces of the upper and lower sides of the first and second transition sections, and the upper and lower sides of the intermediate section are also parallel planar surfaces.

6. The flat chain ring as claimed in claim 5, wherein said first arc segment and said second arc segment are each: the cross-sectional shape and area of the arc section are kept constant in the arc range of the wrapping angle of 50-100 degrees, and the cross-sectional shape of the arc section is a single perfect circle, an ellipse, a trapezoid or a rectangle, or a combination of 2 or three of the shapes.

7. The flat chain ring as claimed in claim 6, wherein the first circular hole and the second circular hole are replaced by oblong holes, and the ratio of the longitudinal dimension to the transverse dimension is comprised between 1 and 1.8.

8. The flat link as claimed in claim 7, wherein the ratio of the pitch of the flat link to the nominal diameter of the flat link is between 3 and 6.

9. The flat link as claimed in claim 8, wherein the ratio of the external width of the flat link to the nominal diameter of the flat link is between 2 and 3.

10. A scraper conveyor mating conveyor chain for large-format mines, comprising a plurality of links that are sequentially nested, wherein at least a second link is a flat link according to any of claims 1 to 9.

Technical Field

The invention belongs to the technical field of conveying equipment, and particularly relates to a flat chain ring.

Background

Scraper conveyors are currently common transportation equipment used for underground coal and mineral mining, and conveyor chains are the core driving part of the transportation equipment and are used for transmitting tensile loads. The scraper conveyor generally comprises a head, a tail, a chain wheel, a middle groove, a chain connecting ring, a scraper and the like, which form a transmission system. The chain passes through the middle groove, bypasses the machine head and the machine tail to form a closed ring, the motor drives the chain wheel to rotate, and the rotating chain wheel pushes the chain to do ring motion in the middle groove. Because the chain all installs horizontal scraper blade at every certain distance, the chain takes the scraper blade to move along the direction of pulling, after the material fell into the middle part inslot, the scraper blade will promote the material and move together to accomplish the purpose of material transportation.

Chains are usually constructed from a plurality of individual links interconnected by a generally flat loop of round section bar material bent and welded into a closed loop. The load that the chain is subjected to during use increases as the power of the drive increases, so it is generally desirable to increase the diameter of the bar of the chain to increase the breaking load of the chain.

Increasing the diameter of the link bar stock, however, results in an increase in the overall height of the chain and in an increase in the space at the bottom of the chute, further resulting in an increase in the height of the overall flight conveyor. Since the underground space in the coal mining industry is usually very narrow, especially when thin coal seams are mined, the scraper conveyor is kept at the smallest possible height, which otherwise greatly affects the coal loading of the scraper conveyor. Therefore, the research on a novel chain ring which can increase the breaking load of the chain and reduce the height of the chain becomes a technical problem which needs to be solved urgently in the field of conveying equipment when the novel chain ring is used for manufacturing a flat chain.

Disclosure of Invention

Technical problem to be solved

The technical problem to be solved by the invention is as follows: how to design a novel chain ring which can increase the breaking load of the chain and reduce the height of the chain and manufacture the flat chain by the novel chain ring.

(II) technical scheme

In order to solve the above technical problems, the present invention provides a flat chain ring, which is bilaterally symmetrical along a longitudinal center line and is vertically symmetrical along a transverse center line; the flat chain link comprises: first circular arc section, second circular arc section that are located flat chain ring both ends are located the first side arm section of both sides about the first round hole of flat chain ring, are located the second side arm section of both sides about the second round hole of flat chain ring, are located the interlude at flat chain ring middle part, connect the first changeover portion of first side arm section and interlude, and connect the second changeover portion of second side arm section and interlude, the interlude is the single armed structure.

Preferably, the first circular arc segment and the second circular arc segment are both: the cross section of the chain link is a circular cross section, and the diameter of the circular cross section equivalent to the cross section area is called the nominal diameter of the flat chain link.

Preferably, the cross-sectional shapes of the first side arm section and the second side arm section are as follows: a semicircular shape, or a cross-sectional shape formed by combining a rectangle and a semicircle; the first round hole and the second round hole are both: round, oval or with semicircular ends and parallel sections in the middle, long closed round, and rounded corners around the hole; the upper surface and the lower surface of the first side arm section are parallel, the ratio of the distance between the upper surface and the lower surface to the equivalent circular section diameter of the section area of the middle symmetrical plane of the first circular arc section is between 2 and 3, and the ratio of the single-side minimum area of the first side arm section to the section area of the middle symmetrical plane of the first circular arc section is between 0.4 and 1; the upper surface and the lower surface of the second side arm section are parallel, the ratio of the distance between the upper surface and the lower surface to the equivalent circular section diameter of the section area of the middle symmetrical plane of the second circular arc section is between 2 and 3, and the ratio of the single-side minimum area of the second side arm section to the section area of the middle symmetrical plane of the second circular arc section is between 0.4 and 1.

Preferably, the cross section of the middle section is a rectangle with rounded periphery, and the ratio of the minimum area of the single side of the first side arm section and the second side arm section to the area of the cross-section rectangle of the middle section is between 0.4 and 1.

Preferably, the upper and lower side surfaces of the middle section are arc surfaces which are in smooth transition with the upper and lower side arc outer surfaces of the first transition section and the second transition section, and the upper and lower side surfaces of the middle section are also parallel planes.

Preferably, the first circular arc segment and the second circular arc segment are both: the cross-sectional shape and area of the arc section are kept constant in the arc range of the wrapping angle of 50-100 degrees, and the cross-sectional shape of the arc section is a single perfect circle, an ellipse, a trapezoid or a rectangle, or a combination of 2 or three of the shapes.

Preferably, the first round hole and the second round hole are replaced by long round holes, and the ratio of the longitudinal dimension to the transverse dimension is between 1 and 1.8.

Preferably, the ratio of the pitch of the flat link to the nominal diameter of the flat link is between 3 and 6.

Preferably, the ratio between the external width of the flat link and the nominal diameter of the flat link is comprised between 2 and 3.

The invention also provides a matched transmission chain of the large-specification mining scraper conveyor, which comprises a plurality of chain links which are sequentially sleeved, wherein at least a second chain link is the flat chain link.

(III) advantageous effects

The invention provides a novel structure forged flat vertical ring, which improves the structural strength by adjusting the structural size of a straight arm section. Meanwhile, the outer width of the flat vertical ring is controlled, so that the flat vertical ring can adapt to a lower working space, the height of the chain ring in the vertical direction is further reduced under the condition of the same strength grade, the higher strength and the larger tonnage are realized, and the service life of the chain is prolonged. Furthermore, because the oblate ring interlude is single armed structure, can effectively separate two adjacent rings that the oblate ring connects, avoid two direct contact to effectively avoid the knotting phenomenon that the chain link probably takes place in the use.

Drawings

FIG. 1 is a schematic structural view of a chain with a novel structure according to the present invention;

FIG. 2 is a schematic view of each part of a flat ring with a novel structure according to the present invention;

FIG. 3 is a sectional view of a symmetrical plane of a flat ring with a novel structure along the long axis direction;

FIG. 4 is a transverse sectional view of side arm segments II and VI of a novel structural oblate ring provided by the invention;

FIG. 5 is a transverse cross-sectional view of a middle section IV of a novel structural oblate ring according to the present invention;

FIG. 6 is a diagram showing the profile of a novel structural flat ring according to the present invention, in which the ratio of the pitch length to the nominal diameter of the chain is between 3 and 4;

FIG. 7 is a schematic view of a chain woven from the short-pitch flat rings of FIG. 6;

FIG. 8 is a cross-sectional view of a long axial plane of symmetry of a short pitch flat ring in accordance with the present invention.

Detailed Description

In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The invention relates to a chain consisting of individual chain links which are nested together, wherein at least the second ring is designed as a flat chain link. The novel structural chain designed by the invention is shown in figure 1, and the novel structural flat ring designed in the novel structural chain is shown in figure 2. All the flat chain rings on the chain have the same structure.

In fig. 1, 1 is a circular ring, and a bar material with a circular section of the circular ring is formed by welding after being chained, and the specification of the chain is determined by the nominal diameter of the section of the circular ring in a normal condition. 2 is a flat ring, also called a vertical ring, because it is kept in a vertical state during the running of the chain.

FIG. 2 is a schematic view of the flat ring. In fig. 2, I and VII are arc sections at two ends of a flat ring, II and VI are side arm sections at two sides of a round hole of the flat ring, III and V are transition sections of side arm sections and a middle section IV area, IV is the middle section of the flat ring, and the middle section is of a single-arm structure.

Fig. 3 is a sectional view of the flat ring along the long-axis symmetry plane. The cross section of the middle symmetrical surface of the arc sections I and VII is a cross section formed by compounding a rectangle and a semicircle as shown by the shapes of the left and right shaded areas in figure 3. The cross-section may also be circular or approximately circular in cross-section. The diameter of the circular cross-section equivalent to the cross-sectional area is commonly referred to as the nominal diameter of the chain link. Typically, the diameter is equal to or similar to the diameter of the round bar of the flat link chain.

Fig. 4 is a transverse cross-sectional view of the side arm sections ii, vi of the oblate rings. The cross-sectional shapes of the side arm sections II and VI are shown as the shaded areas at the upper side and the lower side in FIG. 4, and the cross-sectional shapes are semicircular. The cross section may also be a composite cross sectional shape of a rectangle and a semicircle, as shown in fig. 3. The holes in the areas of the side arm sections II and VI are circular or elliptical or elongated closed circles with semicircular ends and parallel sections in the middle, and the peripheries of the holes are rounded corners. The outer side surfaces of the side arm sections II and VI are approximately parallel planes, only the upper and lower surfaces are slightly inclined at an angle of 3-5 degrees with the horizontal plane due to the die parting surface with an inclination angle of about 3-5 degrees required by the forging process, but the upper and lower side surfaces are kept parallel as a whole. The ratio of the distance between the upper surface and the lower surface (outer width) to the diameter of the circular section equivalent to the section area of the middle symmetrical surface of the circular arc sections I and VII is between 2 and 3. The ratio of the single-side minimum area of the side arm sections II and VI to the cross-sectional area of the middle symmetrical surface of the arc sections I and VII is between 0.4 and 1.

Taking the transition section III as an example, the left side of the III is connected with the side arm section II, the cross section shape is the same as that of the side arm sections II and VI, and the two side arms above and below the flat ring circular hole are gradually transited from two semicircles separated at the left side to the right to be connected into a rectangular integral cross section. The outer surfaces of the upper side and the lower side of the transition sections III and V are arc surfaces and smoothly transition to the middle section IV.

Fig. 5 is a transverse sectional view of the intermediate section iv, and the hatched portion in fig. 5 is the cross-sectional shape of the intermediate section iv. The cross section of the middle section IV is a rectangle with rounded periphery, and the ratio of the minimum area of one side of each side arm section II and VI to the rectangular area of the cross section of the middle section IV is between 0.4 and 1. The upper and lower side surfaces of the middle section IV are arc surfaces which are in smooth transition with the upper and lower arc outer surfaces of the transition sections III and V, the upper and lower side surfaces of the middle section IV can also be approximately parallel planes, only because the forging process requires a die parting surface with an inclination angle of about 3-5 degrees, the upper and lower surfaces are slightly at an included angle of 3-5 degrees with the horizontal plane, but the upper and lower side surfaces are kept parallel as a whole. The profile of the upper and lower side surfaces of the intermediate section iv depends to a large extent on the pitch length of the oblate rings. The pitch of the flat ring is defined, and the pitch of the flat ring is the distance between the leftmost tangent point of the inner hole of the side wall section II and the rightmost tangent point of the inner hole of the side wall section VI in the figure 2; the mid-section iv of the links, which is defined as the short pitch link, will be sharply shortened when the ratio of the link pitch length to the chain nominal diameter is between 3 and 4, as shown in fig. 6. When the ratio of the length of the pitch of the links to the nominal diameter of the chain is greater than 4, the intermediate section iv of the links, which is defined as a long-pitch link, will gradually become longer, as shown in fig. 1.

Fig. 6 shows the profile of a ratio of the length of the pitch of the flat ring to the nominal diameter of the chain between 3 and 4. Fig. 7 shows a chain woven with such short-pitch flat rings.

FIG. 8 is a cross-sectional view of a short-pitch flat ring along a long-axis symmetry plane. The cross-sectional shape of the median plane of symmetry in the arc segments I, VII of FIG. 8 is the same as that shown in FIG. 3, without change. However, due to the small pitch, and the need for chamfering the hole edges at both ends, the length of the middle section IV is extremely short, and it can be considered that the three sections III, IV and V are degenerated into a transition section with the size of the middle recessed area in FIG. 6. The cross section of the intermediate section iv is also gradually reduced from an approximately long rectangle in fig. 3 to an approximately spindle-shaped one in fig. 7.

Therefore, the outer width of the forged flat ring with the novel structure provided by the invention is smaller than that of a compact chain flat ring with the same specification, so that the total height of the chain ring and the chain is reduced. The reduction of the chain height can bring two benefits, firstly, a larger-size chain can be adopted under the condition of the same chain height, so that the bearing load of the chain is increased; secondly, under the condition of the same chain specification, the chain can be made to be flatter, so that the height of the scraper conveyor is reduced, and the coal mining benefit is improved. Furthermore, the middle part of the forging flat ring with the novel structure is provided with a single arm, two ends of the forging flat ring are circular rings, and the overall appearance of the forging flat ring is similar to that of a dumbbell. Due to the middle single-arm structure, the chain knotting which often happens to the conveyor can be prevented.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.