Left-right synchronous lifting waste rock blocking device in front of frame

Abstract

The utility model discloses a left and right synchronous lifting frame front waste rock blocking device in the technical field of coal mining machinery, which comprises a fixed frame, longitudinal sliding chutes are arranged on the left and right sides of the fixed frame, a lifting frame is connected between the two sliding chutes in a sliding manner, and a group of oil cylinders are symmetrically arranged on the left and right sides of the fixed frame close to the bottom; the output ends of the two oil cylinders are connected with the lifting frame through a set of connecting rod mechanisms, the oil cylinders stretch out and draw back to drive the lifting frame to longitudinally slide through the connecting rod mechanisms, a longitudinal guide column is fixedly connected to the center of the bottom of the fixing frame, and the guide column is slidably connected with a guide sliding block. And the two groups of connecting rod mechanisms are connected with the guide sliding block. According to the importance of the first safety in mining, effective isolation of the pedestrian path is very important, a safe space is provided for coal mining workers, the safe space for the coal mining workers is effectively isolated, and important guarantee is provided for coal mining safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to a left and right synchronous lifting's frame front gangue blocking device belongs to coal mining instrument technical field. BACKGROUND

[0002] The frame front gangue blocking device is the barrier preventing the coal blocks and gangues in the coal mining face from entering the human passage between the hydraulic support and the scraper conveyor, and is the important measure for protecting the safety of the personnel in the coal mining face, and the practicability of the frame front gangue blocking device influences the advancing efficiency and advancing speed of the coal mining face.

[0003] In the steeply inclined coal mining face, the gangues and coal blocks come from the high place dozens of meters or even hundreds of meters away, and the height difference can reach dozens of meters, which greatly threatens the safety of the coal mining personnel, and therefore, the frame front gangue blocking device needs to completely isolate the coal mining passage from the human passage, and needs to be seamlessly or slightly jointed with the hydraulic support to ensure the safety of the human passage. SUMMARY

[0004] The utility model discloses a left and right synchronous lifting's frame front gangue blocking device, solved the problem that the gangue exists a long time empty period when pulling the frame and pushing the slide, and the gangues and coal blocks are easy to enter the human passage, and the safety of the coal mining personnel is threatened.

[0005] To achieve the above-mentioned purpose, the utility model is adopted the following technical scheme:

[0006] First, the utility model provides a left and right synchronous lifting's frame front gangue blocking device, including fixed frame, the left and right sides of fixed frame all are equipped with the sliding slot of longitudinal, and the sliding connection has the lifting frame between two sliding slots, the position symmetry of fixed frame left and right sides close to the bottom installs a group of oil cylinder, and the output of two oil cylinders all is connected with lifting frame through a group of connecting rod mechanism, and the telescopic of oil cylinder drives the longitudinal sliding of lifting frame through connecting rod mechanism, the bottom center of fixed frame is fixedly connected with the guide column of longitudinal, and the guide column is slidably connected with the guide sliding block, and two groups connecting rod mechanism all are connected with guide sliding block.

[0007] Further, the connecting rod mechanism comprises a pull rod, an upper connecting rod and a lower connecting rod, the top end of the upper connecting rod is connected with the top of the lifting frame, the bottom end of the upper connecting rod is connected with the upper rod body of the lower connecting rod, the bottom end of the lower connecting rod is connected with the bottom of the fixed frame, and the left and right ends of the pull rod are connected with the top end of the lower connecting rod and the guide sliding block respectively.

[0008] Further, the connecting rod mechanism comprises a pull rod, an upper connecting rod and a lower connecting rod, the top end of the upper connecting rod is connected with the top of the lifting frame, the bottom end of the upper connecting rod is connected with the upper rod body of the lower connecting rod, the bottom end of the lower connecting rod is connected with the bottom of the fixed frame, and the left and right ends of the pull rod are connected with the top end of the lower connecting rod and the guide sliding block respectively.

[0009] Further, the bottom of the guide column is fixedly connected with the fixed frame through a nut.

[0010] Further, the oil cylinder comprises an upper cavity and a lower cavity, when the lower cavity supplies liquid, the oil cylinder extends to drive the connecting rod mechanism to drive the lifting frame to extend, and when the upper cavity supplies liquid, the oil cylinder is retracted to drive the connecting rod mechanism to drive the lifting frame to retract.

[0011] Further, the left and right synchronous lifting frame front gangue blocking device is installed on the cable groove of the scraper conveyor in front of the pedestrian passageway.

[0012] Compared with the prior art, the utility model reaches the beneficial effect that:

[0013] First, the left and right synchronous lifting frame front gangue blocking device solves the problem that the gangue blocking exists for a long time interval when the frame is pulled and pushed, and the coal and gangue are easy to enter the pedestrian passageway, which threatens the safety of the coal mining personnel, according to the importance of safety first in mining, effectively isolates the pedestrian passageway, provides a safe space for the coal mining personnel, and is extremely important for the coal mining personnel, effectively isolates the safety space of the coal mining personnel, and provides an important guarantee for the safety of coal mining.

[0014] Second, the application is more effective in matching the three-machine operation of the mining face, reduces the operation difficulty, improves the coal mining efficiency, and more effectively and reasonably uses the limited space underground, thereby providing a safer and larger operation space for the coal mining personnel; the scheme utilizes a more reasonable mechanical structure to ensure that the frame front gangue blocking device is smoothly extended and retracted to cooperate with the coal mining operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the utility model form a part of the utility model and are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0016] Figure 1 It is an installation schematic view of the frame front gangue blocking device in the prior art one.

[0017] Figure 2 It is an installation schematic view of the frame front gangue blocking device in the prior art two.

[0018] Figure 3 This is a schematic diagram of the tilted state of the front retaining device in the prior art 2;

[0019] Figure 4 A schematic diagram of a front retaining device for synchronous left and right lifting provided in Embodiment 1 of this utility model;

[0020] Figure 5 A schematic diagram of the installation of a front retaining device for synchronous left and right lifting provided in Embodiment 1 of this utility model;

[0021] Figure 6 A schematic diagram of the tilted state of a front retaining device for synchronous left and right lifting provided in Embodiment 1 of this utility model;

[0022] In the diagram: 1. Fixed frame; 2. Lifting frame; 3. Guide column; 4. Guide slider; 5. Tie rod; 6. Upper connecting rod; 7. Lower connecting rod; 8. Hydraulic cylinder; 9. Slide groove; 10. Pin; 11. Nut. Detailed Implementation

[0023] like Figure 1 In the prior art shown, the front rock-blocking device of the face support is located below the front end of the hydraulic support top beam, between the front end of the hydraulic support top beam column socket and the scraper conveyor cable trough. The rock-blocking function is achieved by extending and retracting a hydraulic cylinder. When the cylinder extends, the rock-blocking device cooperates with the scraper conveyor cable trough to isolate the pedestrian passage, allowing coal mining to proceed. When the cylinder retracts, the rock-blocking device retracts to the lower part of the hydraulic support top beam, facilitating the pulling of the support and the pushing of the conveyor. It can be seen from the above technical solution that the rock-blocking device is located at the lower end of the hydraulic support top beam, which has the following disadvantages:

[0024] (1) During the pulling and pushing of the conveyor, there is a long gap period, during which gangue and coal can easily enter the pedestrian passage, posing a threat to the safety of coal miners;

[0025] (2) When the mining height is lower, the front rock blocking device cannot be effectively opened, occupying the pedestrian passage; when the mining height is higher, there is a gap between the rock blocking device and the cable trough of the scraper conveyor, allowing rock and coal to enter the pedestrian passage, posing a threat to the safety of coal miners.

[0026] (3) Due to the limited space at the top of the pedestrian passage, the arrangement and length of the rock-blocking device are restricted, making it difficult to achieve effective rock-blocking under different mining heights.

[0027] like Figure 2In the shown prior art two, the frame front gangue blocking device is installed behind the cable trough of the scraper conveyor, and has guide grooves at the left and right ends, and is driven by the left and right two lifting oil cylinders to slide in the guide grooves, so as to isolate the pedestrian passageway, and when the mining height changes, the lifting frame is driven by the lifting oil cylinders to move up and down to cooperate with the top beam of the hydraulic support, so as to realize the blocking effect of the gangue. The prior art two effectively solves the shortcomings of the prior art one, but has the following shortcomings:

[0028] The left and right two lifting oil cylinders are symmetrically arranged, and no matter whether one valve controls the two lifting oil cylinders to be supplied with liquid at the same time or two valves control the two lifting oil cylinders to be supplied with liquid separately, the liquid amount of the two lifting oil cylinders cannot be guaranteed to be the same, especially in the steeply inclined mining face (such as Figure 3 The left and right ends are subjected to different forces, which leads to different forces of the two oil cylinders, at this time, the oil cylinder with small force will have a fast extension and retraction speed, so that the extension and retraction amounts of the two lifting oil cylinders are different, the operation is out of synchronization, and finally the lifting frame is stuck, so that the lifting frame cannot be smoothly lifted and lowered.

[0029] The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] The following detailed description is exemplary description, and is intended to provide further detailed description of the present application. Unless otherwise specified, all technical terms used in the present application are the same as the meanings commonly understood by the general technical personnel in the field to which the present application belongs. The terms used in the present application are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0031] Embodiment:

[0032] The present application provides a left-right synchronous lifting frame front gangue blocking device, as shown in Figure 4 The device mainly comprises a fixed frame 1, a lifting frame 2, a guide column 3, a guide sliding block 4, a pull rod 5, an upper connecting rod 6, a lower connecting rod 7, an oil cylinder 8, and a pin shaft 10, a nut 11 and the like connecting pieces. The fixed frame 1 has a sliding groove 9 at the left and right ends, the lifting frame 2 slides up and down in the sliding groove 9, the sliding groove 9 limits the lifting frame 2 to slide up and down and cannot be tilted forward and backward and moved left and right, the guide column 3 is fixed on the fixed frame 1, and the guide sliding block 4 slides up and down along the guide column 3 to form a sliding pair. The fixed frame 1 is provided with four connecting holes, which are connected with two lower connecting rods 7 and two oil cylinders 8 respectively, and the lifting frame 2 is provided with two connecting holes which are connected with two upper connecting rods 6 respectively.

[0033] The pull rod 5, the upper connecting rod 6 and the oil cylinder 8 are connected with the lower connecting rod 7 through the pin shaft 10, and the connecting position forms a rotary movement pair. The pull rod 5, the upper connecting rod 6 and the oil cylinder 8 are connected with the guide sliding block 4, the lifting frame 2 and the fixed frame 1 through the pin shaft 10, and a rotary movement pair is formed. After the oil cylinder 8 is supplied with liquid, the extension and retraction of the oil cylinder 8 drives the lower connecting rod 7 to rotate, thereby pushing the upper connecting rod 6 to drive the lifting frame 2 to move up and down to realize the extension and retraction function. During the rotation of the lower connecting rod 7, the guide sliding block 4 is pulled up and down by the pull rod 5, and the guide sliding block 4 is always kept in the middle position through the guide column 3, and the left and right ends of the two pull rods 5 are kept at the same height with the guide sliding block 4, so that the left and right symmetrical movements of the lower connecting rod 7 are ensured, and the synchronous lifting and lowering movements of the left and right ends of the lifting frame 2 are realized.

[0034] As shown in Figure 5 , the left-right synchronous lifting frame front gangue blocking device is installed on the scraper conveyor cable groove in front of the pedestrian passageway, and the gangue blocking device is driven to extend and retract by the extension and retraction of the oil cylinder to cooperate with the hydraulic support to isolate the pedestrian passageway and the mining face. When the mining height is lowered or raised, the gangue blocking device cooperates with the hydraulic support to effectively isolate the pedestrian passageway and the mining face by controlling the oil cylinder. When the hydraulic support moves and pushes, the gangue blocking device can be extended or retracted in time to cooperate with the movement and pushing.

[0035] As shown in Figure 6 , when the lower cavity of the oil cylinder is supplied with liquid, the oil cylinder extends to drive the connecting rod mechanism to drive the lifting frame to extend; when the upper cavity of the oil cylinder is supplied with liquid, the oil cylinder retracts to drive the connecting rod mechanism to drive the lifting frame to retract, and due to the limitation of the connecting rod mechanism, the two ends of the lifting frame move synchronously.

[0036] The left-right synchronous lifting frame front gangue blocking device solves the problems that when the support is pulled and the gangue is pushed, the gangue has a long idle period, the gangue and coal blocks are easy to enter the pedestrian passageway, and the safety of the coal mining personnel is threatened; when the mining height changes, the gangue blocking device can effectively isolate the pedestrian passageway and the mining face at different mining heights to ensure the safety of the personnel; the gangue blocking device occupies the pedestrian passageway; the gangue blocking device is effectively arranged in the three-machine matching; and the left and right movements of the lifting frame of the gangue blocking device are not synchronized.

[0037] According to the importance of safety first in coal mining, the left-right synchronous lifting frame front gangue blocking device effectively isolates the pedestrian passageway, provides a safe working space for the coal mining personnel, and provides an important guarantee for coal mining safety; the application of the left-right synchronous lifting frame front gangue blocking device more effectively matches the operation of the three machines in the mining face, reduces the operation difficulty, and improves the coal mining efficiency; the left-right synchronous lifting frame front gangue blocking device more effectively and reasonably uses the limited space in the mine, and provides a safer and larger working space for the coal mining personnel; the left-right synchronous lifting frame front gangue blocking device utilizes a more reasonable mechanical structure to ensure that the frame front gangue blocking device smoothly extends and retracts to cooperate with the coal mining operation.

[0038] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely illustrative in all aspects and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

[0039] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by the same, without departing from the spirit and scope of the present application. Any modification or equivalent replacement, which does not depart from the spirit and scope of the present application, should be covered by the protection scope of the claims of the present application.

Claims

1. A front granite retaining device that synchronously lifts and lowers from left to right, characterized in that, The device includes a fixed frame (1), on which longitudinal sliding grooves (9) are provided on both the left and right sides, and a lifting frame (2) is slidably connected between the two sliding grooves (9). A set of hydraulic cylinders (8) are symmetrically installed on the left and right sides of the fixed frame (1) near the bottom. The output ends of the two hydraulic cylinders (8) are connected to the lifting frame (2) through a set of linkage mechanisms. The extension and retraction of the hydraulic cylinders (8) drive the lifting frame (2) to slide longitudinally through the linkage mechanism. A longitudinal guide column (3) is fixedly connected at the bottom center of the fixed frame (1), and a guide slider (4) is slidably connected to the guide column (3). Both sets of linkage mechanisms are connected to the guide slider (4).

2. The front grate retaining device for synchronous left and right lifting as described in claim 1, characterized in that, The linkage mechanism includes a pull rod (5), an upper link (6) and a lower link (7). The top end of the upper link (6) is connected to the top of the lifting frame (2), the bottom end of the upper link (6) is connected to the upper part of the lower link (7), the bottom end of the lower link (7) is connected to the bottom of the fixed frame (1), and the left and right ends of the pull rod (5) are connected to the top end of the lower link (7) and the guide slider (4) respectively.

3. The front grate retaining device for synchronous left and right lifting as described in claim 2, characterized in that, The guide slider (4), pull rod (5), upper connecting rod (6), lower connecting rod (7) and oil cylinder (8) are all connected by pins (10).

4. The front grate retaining device for synchronous left and right lifting as described in claim 1, characterized in that, The bottom of the guide post (3) is fixedly connected to the fixing frame (1) by a nut (11).

5. The front grate retaining device for synchronous left and right lifting according to claim 1, characterized in that, The cylinder (8) includes an upper chamber and a lower chamber. When the lower chamber supplies liquid, the cylinder (8) extends and drives the linkage mechanism to extend the lifting frame (2). When the upper chamber supplies liquid, the cylinder (8) retracts and drives the linkage mechanism to retract the lifting frame (2).

6. The front grate retaining device for synchronous left and right lifting according to claim 1, characterized in that, The left and right synchronous lifting front retaining device is installed on the scraper conveyor cable trough in front of the pedestrian passage.

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