Telescopic tail limiting device of scraper conveyor

Abstract

The utility model relates to a limiting device for a telescopic tail of a scraper conveyer, and belongs to the technical field of scraper conveyors. Comprising an upper rack, a lower rack, a machine tail baffle, a pulling oil cylinder and a limiting mechanism. The lower rack is arranged on the rear side of the upper rack, a pulling oil cylinder is arranged between the lower rack and the upper rack, a cylinder body of the pulling oil cylinder is fixed to the upper rack, a piston rod of the pulling oil cylinder is horizontally backward and fixedly connected with the lower rack, and the lower rack is controlled to move forwards or backwards relative to the upper rack through stretching and retracting of the pulling oil cylinder. A machine tail baffle is fixedly arranged at the rear end of the upper machine frame, the machine tail baffle is located in a vertical plane in the front-back direction, the machine tail baffle is located above the lower machine frame, a limiting mechanism is arranged on the machine tail baffle, and the front end of the lower machine frame is mechanically limited through the limiting mechanism. The problem that the space of a bottom sealing plate is compressed by an existing telescopic tail limiting device of the scraper conveyor is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of scraper conveyors, and in particular relates to a telescopic tail limiting device for a scraper conveyor. Background Art

[0002] The tail of the scraper conveyor is generally designed to be retractable, divided into an upper frame and a lower frame. The push cylinders arranged on both sides can be used to displace the upper and lower frames front and back without cutting the scraper chain, and the tightness of the scraper chain can be adjusted. The adjustment amount is generally 0-500mm. After the cylinder adjustment is completed, if only the push and pull force of the cylinder is used to maintain the relative position of the upper and lower frames of the telescopic tail, if the liquid supply pressure is insufficient or the cylinder seal is damaged, it is easy for the upper and lower frames of the telescopic tail to fail to remain stable, causing safety hazards. Therefore, a set of mechanical limit devices must be added to fix the position of the upper and lower frames to ensure the stability of the telescopic tail.

[0003] The existing mechanical limit method is usually to set a row of limit holes arranged in front and back on the upper frame and the lower frame respectively. After the relative position of the upper frame and the lower frame is adjusted, the limit pins are inserted into the corresponding limit holes to mechanically limit the upper frame and the lower frame. This limit method requires the addition of ear plates under the bottom plate of the upper frame, resulting in compression of the bottom plate space, so that the height of the telescopic tail is increased, which will cause the wear resistance of the bottom plate of the tail to be reduced due to the increase in curvature, and at the same time, the tail cannot meet the use requirements of some thin coal seam working faces. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art and proposes a telescopic tail limiter for a scraper conveyor, thereby solving the problem that the telescopic tail limiter for a scraper conveyor currently causes compression of the bottom plate space.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0006] A telescopic tail limit device for a scraper conveyor comprises an upper frame, a lower frame, a tail baffle, a pulling cylinder and a limiting mechanism; the lower frame is arranged on the rear side of the upper frame, a pulling cylinder is arranged between the lower frame and the upper frame, the cylinder body of the pulling cylinder is fixed on the upper frame, the piston rod of the pulling cylinder is horizontally backward and fixedly connected to the lower frame, and the forward or backward movement of the lower frame relative to the upper frame is controlled by the extension and contraction of the pulling cylinder; a tail baffle is fixedly arranged at the rear end of the upper frame, the tail baffle is located in a vertical plane in the front-rear direction, the tail baffle is located above the lower frame, a limiting mechanism is arranged on the tail baffle, and the front end of the lower frame is mechanically limited by the limiting mechanism.

[0007] Furthermore, the limiting mechanism includes a limiting cylinder, a connecting frame, a lifting plate, and a positioning block; two front-to-back symmetrical ear seats are fixedly arranged on the left end face of the tail baffle, and a horizontal connecting frame is fixedly arranged between the two ear seats, and the front and rear ends of the connecting frame are fixedly connected to the two ear seats by bolts respectively.

[0008] Furthermore, the cylinder body of the limiting oil cylinder is fixed on the connecting frame, the piston rod of the limiting oil cylinder vertically passes through the connecting frame downward and a horizontal lifting plate is hinged at the end of the piston rod, and the lifting plate is extended along the front-rear direction.

[0009] Furthermore, a row of positioning blocks is sleeved on the outer side of the lifting plate 9, and all the positioning blocks are arranged in sequence along the front-to-back direction.

[0010] Furthermore, the positioning block is a vertically arranged square plate-like structure, and a square lifting groove is arranged in the middle of its upper end surface; the lifting grooves of all positioning blocks are sleeved on the outer side of the lifting plate, and the two side end surfaces of the lifting plate are in sliding contact with the two side inner walls of the lifting groove, so that the lifting plate slides inside the lifting groove of the positioning block; the upper end opening width of the lifting groove is smaller than the width of the lifting plate, so that the lifting plate cannot fall out of the lifting groove.

[0011] Furthermore, a square snap-in groove is provided at the lower edge of the right side surface of the positioning block, the inner side wall of the snap-in groove is in sliding contact with the upper edge of the left end surface of the lower frame, and the inner top surface of the snap-in groove is located above the left edge of the upper end surface of the lower frame.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] The utility model provides a telescopic tail limit device for a scraper conveyor. When the telescopic tail is working, the upper and lower frames will stagger a gap on the baffle side due to the action of the pulling cylinder. After the tail is fixed, the limit cylinder is controlled to extend. At this time, the lifting plate will be in a low horizontal position. At this time, since the positioning block is sleeved on the lifting plate, the positioning block on the front side of the lower frame will fall due to gravity and get stuck at the front end of the lower frame, while the positioning block that has not completely fallen will get stuck on the lower frame. The travel sensor provided on the limit cylinder can accurately determine the extension length of the piston rod to ensure that the positioning block can be completely stuck at the front end of the lower frame. The entire telescopic tail positioning process does not require manual pinning operations, but only requires the limit cylinder operation, which is simple to operate and avoids certain safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 is a side view of the limiting mechanism;

[0017] Figure 3 It is the rear view of the limit mechanism;

[0018] Among them, 1 is the upper frame, 2 is the lower frame, 3 is the tail baffle, 4 is the pulling cylinder, 5 is the limiting mechanism, 6 is the ear seat, 7 is the connecting frame, 8 is the limiting cylinder, 9 is the lifting plate, 10 is the positioning block, 11 is the lifting slot, and 12 is the clamping slot. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0020] like Figure 1 As shown in FIG. 3 , the utility model provides a telescopic tail limit device for a scraper conveyor, comprising an upper frame 1, a lower frame 2, a tail baffle 3, a pulling cylinder 4, and a limit mechanism 5.

[0021] The lower frame 2 is arranged on the rear side of the upper frame 1, and a pulling cylinder 4 is arranged between the lower frame 2 and the upper frame 1. The cylinder body of the pulling cylinder 4 is fixed on the upper frame 1, and the piston rod of the pulling cylinder 4 is horizontally backward and fixedly connected to the lower frame 2. The forward or backward movement of the lower frame 2 relative to the upper frame 1 is controlled by the extension and retraction of the pulling cylinder 4.

[0022] A tail baffle 3 is fixedly provided at the rear end of the upper frame 1. The tail baffle 3 is located in a vertical plane in the front-to-back direction. The tail baffle 3 is located above the lower frame 2. A limiting mechanism 5 is provided on the tail baffle 3. The limiting mechanism 5 is used to mechanically limit the front end of the lower frame 2.

[0023] The limiting mechanism 5 includes a limiting oil cylinder 8 , a connecting frame 7 , a lifting plate 9 , and a positioning block 10 .

[0024] Two front-to-rear symmetrical ear seats 6 are fixedly arranged on the left end surface of the tail baffle 3, and a horizontal connecting frame 7 is fixedly arranged between the two ear seats 6. The front and rear ends of the connecting frame 7 are fixedly connected to the two ear seats 6 by bolts respectively.

[0025] The cylinder body of the limiting oil cylinder 8 is fixed on the connecting frame 7, the piston rod of the limiting oil cylinder 8 vertically passes through the connecting frame 7 downward and a horizontal lifting plate 9 is hinged at the end of the piston rod, and the lifting plate 9 is extended along the front-back direction.

[0026] A row of positioning blocks 10 is sleeved on the outer side of the lifting plate 9 , and all positioning blocks 10 are arranged in sequence along the front-to-back direction.

[0027] The positioning block 10 is a vertically arranged square plate-shaped structure, and a square lifting groove 11 is arranged in the middle of its upper end surface; the lifting grooves 11 of all positioning blocks 10 are sleeved on the outer side of the lifting plate 9, and the end surfaces of both sides of the lifting plate 9 are in sliding contact with the inner walls of both sides of the lifting grooves 11, so that the lifting plate 9 can slide inside the lifting grooves 11 of the positioning block 10; the upper end opening width of the lifting grooves 11 is smaller than the width of the lifting plate 9, so that the lifting plate 9 cannot fall out of the lifting grooves 11.

[0028] A square snap-in groove 12 is provided at the lower edge of the right side surface of the positioning block 10 , the inner side wall of the snap-in groove 12 is in sliding contact with the upper edge of the left end surface of the lower frame 2 , and the inner top surface of the snap-in groove 12 is located above the left edge of the upper end surface of the lower frame 2 .

[0029] The travel sensor provided on the limit oil cylinder 8 can accurately determine the extension length of the piston rod.

[0030] The working principle of the utility model is:

[0031] When the pulling cylinder 4 extends a certain distance, the distance between the lower frame 2 and the upper frame 1 is adjusted, and the position of the lower frame 2 is fixed. At this time, the piston rod of the control limit cylinder 8 is extended, and the piston rod of the limit cylinder 8 drives a row of positioning blocks 10 to descend at the same time through the lifting plate 9, wherein the inner top surface of the clamping groove 12 of some positioning blocks 10 on the rear side contacts the left edge of the upper end surface of the lower frame 2, and this part of the positioning hole is lifted upward by the upper end surface of the lower frame 2, so that the positioning block 10 slides upward relative to the lifting plate 9; while the inner top surface of the clamping groove 12 of the remaining positioning blocks 10 on the front side does not contact the lower frame 2 during the descent process, so that it is completely dropped into place under the drive of the lifting plate 9, and at this time, among the positioning blocks 10 that are completely dropped into place, the rear end surface of the last positioning block 10 contacts the front end surface of the lower frame 2, so that the positioning blocks 10 that are completely dropped into place play a role in limiting the lower frame 2, thereby realizing mechanical positioning.

[0032] The utility model can meet the requirements of different tail telescopic lengths by arranging a row of positioning blocks 10 with equal thickness.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A telescopic tail limiter device for a scraper conveyor, characterized in that: The invention comprises an upper frame (1), a lower frame (2), a tail baffle (3), a pulling cylinder (4), and a limiting mechanism (5); the lower frame (2) is arranged at the rear side of the upper frame (1); a pulling cylinder (4) is arranged between the lower frame (2) and the upper frame (1); the cylinder body of the pulling cylinder (4) is fixed on the upper frame (1); the piston rod of the pulling cylinder (4) is horizontally backward and fixedly connected to the lower frame (2); the forward movement or backward movement of the lower frame (2) relative to the upper frame (1) is controlled by the extension and retraction of the pulling cylinder (4); a tail baffle (3) is fixedly arranged at the rear end of the upper frame (1); the tail baffle (3) is located in a vertical plane in the front-rear direction; the tail baffle (3) is located above the lower frame (2); a limiting mechanism (5) is arranged on the tail baffle (3); and the front end of the lower frame (2) is mechanically limited by the limiting mechanism (5).

2. The telescopic tail limit device of a scraper conveyor according to claim 1, characterized in that: The limiting mechanism (5) comprises a limiting oil cylinder (8), a connecting frame (7), a lifting plate (9), and a positioning block (10); two front-to-rear symmetrical ear seats (6) are fixedly arranged on the left end surface of the tail baffle (3); a horizontal connecting frame (7) is fixedly arranged between the two ear seats (6); and the front and rear ends of the connecting frame (7) are fixedly connected to the two ear seats (6) by bolts.

3. The telescopic tail limit device of a scraper conveyor according to claim 2 is characterized in that: The cylinder body of the limiting oil cylinder (8) is fixed on the connecting frame (7), the piston rod of the limiting oil cylinder (8) vertically passes through the connecting frame (7) downward, and a horizontal lifting plate (9) is hinged at the end of the piston rod, and the lifting plate (9) is extended along the front-back direction.

4. The telescopic tail limit device of a scraper conveyor according to claim 3 is characterized in that: A row of positioning blocks (10) is sleeved on the outer side of the lifting plate (9), and all the positioning blocks (10) are arranged in sequence along the front-to-back direction.

5. The telescopic tail limit device of a scraper conveyor according to claim 4 is characterized in that: The positioning block (10) is a vertically arranged square plate-shaped structure, and a square lifting groove (11) is arranged in the middle of its upper end surface; the lifting grooves (11) of all the positioning blocks (10) are sleeved on the outside of the lifting plate (9), and the end surfaces on both sides of the lifting plate (9) are in sliding contact with the inner walls on both sides of the lifting groove (11), so that the lifting plate (9) slides inside the lifting groove (11) of the positioning block (10); the width of the upper end opening of the lifting groove (11) is smaller than the width of the lifting plate (9), so that the lifting plate (9) cannot fall out of the lifting groove (11).

6. The telescopic tail limit device of a scraper conveyor according to claim 5, characterized in that: A square clamping groove (12) is provided at the lower edge of the right side surface of the positioning block (10), the inner side wall of the clamping groove (12) is in sliding contact with the upper edge of the left end surface of the lower frame (2), and the inner top surface of the clamping groove (12) is located above the left edge of the upper end surface of the lower frame (2).

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