Pneumatic side pushing mechanism for hydraulic support

Abstract

The utility model relates to the technical field of hydraulic supports, in particular to a pneumatic side pushing mechanism for a hydraulic support. A pneumatic side pushing mechanism for a hydraulic support comprises a side protection plate which is arranged on one side of a beam body of the hydraulic support, and further comprises a single-acting air damper and a double-acting air cylinder which are arranged in the beam body in a front-back spaced mode and transversely arranged in the beam body in a penetrating mode. One end of the single-acting air damper is fixedly connected with the beam body, the other end of the single-acting air damper is connected with the side guard plate through a side pushing guide rod, one end of the double-acting cylinder is fixedly connected with the beam body, the other end of the double-acting cylinder is connected with the side guard plate through a connecting rod, and the electric air pump provides power for the double-acting cylinder. The side guard plate can effectively reduce cost, is compact in structure and lighter in weight, simplifies a power control system, does not need a complex hydraulic pipeline, and realizes more flexible functions of the side guard plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic support, and specifically relates to a pneumatic side pushing mechanism for hydraulic support. BACKGROUND

[0002] China is rich in coal resources, and is the world's first coal producing country, and the amount of hydraulic support in fully mechanized coal mining equipment is very large, the hydraulic side pushing mechanism of the hydraulic support is widely used, the hydraulic side pushing mechanism is usually composed of a side guard plate, a guide rod, a spring, a connecting rod, a side pushing jack and a hydraulic pipeline, the spring provides pre-tightening force during work, and the side pushing jack retracts the side guard plate by overcoming the spring resistance through hydraulic power. The main shortcomings of the hydraulic side pushing mechanism are:

[0003] (1) the spring stroke is small, the structure size is large, the space occupied is large, the guide rod content is often insufficient, and the side guard plate can only provide pre-tightening force through the spring during work;

[0004] (2) the minimum cylinder diameter of the side pushing jack is 63mm, the general working pressure is 31.5MPa, and two are usually set, the side pushing jack can provide a pulling force of 10 tons, and the weight of the side guard plate is usually not more than 0.6 tons, so the performance of the side pushing jack is very rich, energy is wasted, and the weight of the side pushing jack is heavy;

[0005] (3) the side pushing hydraulic system is complex, the pipeline piece adopts a high-pressure series, the cost is high, and the function depends on the hydraulic pump station system.

[0006] In addition, especially in order to adapt to the electrification and intelligent transformation background of the hydraulic support, the hydraulic system is gradually eliminated.

[0007] Therefore, the conventional hydraulic support hydraulic side pushing mechanism needs to be transformed.

[0008] In order to solve the above problems, people have been seeking an ideal technical solution. SUMMARY

[0009] The utility model discloses to the shortage of prior art, and can effectively reduce the cost, and the structure is compact, and the weight is lighter, and the power control system is simplified, and the function of the side guard plate is more flexible without complicated hydraulic pipeline.

[0010] In order to achieve the above object, the utility model adopts the technical scheme, which is a pneumatic side pushing mechanism for hydraulic support, comprising a side guard plate, the side guard plate is arranged on one side of the beam body of the hydraulic support, further comprising a single-acting air damper and a double-acting cylinder, the single-acting air damper and the double-acting cylinder are transversely arranged in the beam body, one end of the single-acting air damper is fixedly connected with the beam body, the other end is connected with the side guard plate through a side pushing connecting rod, one end of the double-acting cylinder is fixedly connected with the beam body, the other end is connected with the side guard plate through a connecting rod, and the double-acting cylinder is powered by an electric air pump.

[0011] Based on the above, the first guide sleeve and the second guide sleeve are arranged in the beam body and are in sliding fit with the side pushing connecting rod and the connecting rod respectively, the single-acting air damper is coaxially arranged in the first guide sleeve, and the double-acting cylinder is coaxially arranged in the second guide sleeve.

[0012] Compared with the prior art, the utility model has substantial features and progress, specifically, the utility model transforms the conventional hydraulic side pushing mechanism, the spring is replaced by the single-acting air damper with higher extension ratio, the side pushing jack is replaced by the double-acting cylinder, and the hydraulic pump station system is replaced by the electric air pump, thereby optimizing the hydraulic transmission into pneumatic, effectively reducing the cost, the structure is more compact, the weight is lighter, the power control system is simplified, the complex hydraulic pipeline is not needed, the side guard plate function is more flexible, when the side guard plate works, the conventional hydraulic side pushing mechanism can only provide pre-tightening force by the spring, and the single-acting air damper and the double-acting cylinder of the utility model can provide pre-tightening force, and the stress state of the side guard plate is better. ACCURACY OF DRAWINGS

[0013] Figure 1 is a top view of the utility model;

[0014] Figure 2 is Figure 1 A-A sectional view in the figure;

[0015] Figure 3 is Figure 1 B-B sectional view in the figure.

[0016] Figure 4 is Figure 2 J-J sectional view in the figure.

[0017] In the figure: 1. side guard plate; 2. single-acting air damper; 3. double-acting cylinder; 4. beam body; 5. side pushing connecting rod; 6. connecting rod; 7. first guide sleeve; 8. second guide sleeve; 9. first pin shaft; 10. second pin shaft; 11. third pin shaft; 12. fourth pin shaft. DETAILED DESCRIPTION

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] like Figures 1-4 As shown, a pneumatic side-push mechanism for a hydraulic support includes a side guard plate 1, a single-acting air shock absorber 2, and a double-acting cylinder 3. The side guard plate 1 is disposed on one side of the beam 4 of the hydraulic support. The single-acting air shock absorber 2 and the double-acting cylinder 3 are spaced apart front to back and transversely inserted into the beam 4. One end of the single-acting air shock absorber 2 is fixedly connected to the beam 4, and the other end is connected to the side guard plate 1 through a side-push guide rod 5. One end of the double-acting cylinder 3 is fixedly connected to the beam 4, and the other end is connected to the side guard plate 1 through a connecting rod 6. The double-acting cylinder 3 is powered by an electric air pump.

[0020] In this embodiment, the beam body 4 is provided with a first guide sleeve 7 that slides with the side push rod 5 and a second guide sleeve 8 that slides with the connecting rod 6. The single-acting air shock absorber 2 is coaxially arranged in the first guide sleeve 7, and the double-acting cylinder 3 is coaxially arranged in the second guide sleeve 8.

[0021] Specifically, the first guide sleeve 7 and the first guide sleeve 8 are spaced apart front to back and transversely penetrate the corresponding inner stiffening plates of the beam 4. One end of the first guide sleeve 7 and the first guide sleeve 8 are both inserted into the outer plate of the beam 4 on the same side as the side guard plate 1, and the other end of the first guide sleeve 7 and the first guide sleeve 8 are fixedly connected to the corresponding inner stiffening plates inside the beam 4. The single-acting air shock absorber 2 is coaxially arranged inside the first guide sleeve 7. One end of the side push rod 5 is connected to the side guard plate 1 through the first pin 9, and the other end of the side push rod 5 is inserted into the first guide sleeve 7 and connected to the single-acting air shock absorber 2. The piston rod extension end of the air shock absorber 2 is fixedly connected, and the bottom end of the cylinder of the single-acting air shock absorber 2 is fixedly connected to the inner stiffening plate connected to the first guide sleeve 7; the double-acting cylinder 3 is coaxially arranged in the first guide sleeve 8, one end of the connecting rod 6 is connected to the side guard plate 1 through the second pin 10, and the other end of the connecting rod 6 is inserted into the first guide sleeve 8 and connected to the piston rod extension end of the double-acting cylinder 3 through the third pin 11. The bottom end of the cylinder body of the double-acting cylinder 3 is connected to the first guide sleeve 8 through the fourth pin 12, and the fourth pin is installed on the cover plate of the beam body 4.

[0022] In this embodiment, the side guard plate 1 extends or retracts via the piston rod of the double-acting cylinder 3. When the side guard plate 1 extends, both the single-acting air damper 2 and the double-acting cylinder 3 provide preload to the side guard plate 1, resulting in better stress distribution. When the side guard plate 1 retracts, an electric air pump provides power to the double-acting cylinder 3, causing the piston rod of the double-acting cylinder 3 to overcome the air compression force of the single-acting air damper 2 and retract, thereby retracting the side guard plate 1 and realizing its function.

[0023] In the embodiment, the single-acting air shock absorber 2 replaces the spring to provide the pre-tightening force to the side guard 1, and the single-acting air shock absorber 2 has a higher expansion ratio; the double-acting air cylinder 3 replaces the side push jack, has a compact structure, a small volume, and a lighter weight, and can provide a more optimal structural arrangement; the electric air pump is used to replace the hydraulic pump station system, the power control system is simplified, a complex hydraulic pipeline is not needed, the function of the side guard 1 is more flexible, and the cost is lower.

[0024] It should be finally pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application instead of limiting them; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range claimed by the present application.

Claims

1. A pneumatic side-pushing mechanism for a hydraulic support, comprising a side guard plate disposed on one side of the beam of the hydraulic support, characterized in that: It also includes single-acting air shock absorbers and double-acting cylinders. The single-acting air shock absorbers and double-acting cylinders are spaced apart front and rear and transversely inserted into the beam body. One end of the single-acting air shock absorber is fixedly connected to the beam body, and the other end is connected to the side guard plate through a side push rod. One end of the double-acting cylinder is fixedly connected to the beam body, and the other end is connected to the side guard plate through a connecting rod. The double-acting cylinder is powered by an electric air pump.

2. The pneumatic side-pushing mechanism for a hydraulic support according to claim 1, characterized in that: The beam body is provided with a first guide sleeve that slides with the side push rod and a second guide sleeve that slides with the connecting rod. The single-acting air shock absorber is coaxially arranged in the first guide sleeve, and the double-acting cylinder is coaxially arranged in the second guide sleeve.

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