Telescopic driving device for temporary support

Abstract

The utility model relates to the technical field of temporary support equipment, in particular to a telescopic driving device for temporary support, which is characterized in that the extending end of a piston rod is sleeved with an inner sleeve, and the piston rod is fixedly connected with the driving end of the inner sleeve through an adaptive first connecting flange; the cylinder barrel is sleeved with an outer sleeve, a bottom cylinder cover is installed at the base end of the cylinder barrel, a top cylinder cover is arranged at the other end of the cylinder barrel, and the outer sleeve, the cylinder barrel and the bottom cylinder cover are fixedly connected in a sealed mode through matched second connecting flanges; at least one middle sleeve is arranged between the inner sleeve and the outer sleeve in a sleeving manner, a multi-stage telescopic sleeve is formed among the inner sleeve, the middle sleeve and the outer sleeve, and a matched guide sleeve is arranged on the inner side of the middle sleeve; a lubricating cavity is formed in the inner side of the guide sleeve. According to the hydraulic telescopic driving device, the hydraulic oil cylinder body is organically combined in the telescopic sleeve, the strength and the sealing performance of the hydraulic telescopic driving device are improved, and stable and efficient operation of temporary supporting equipment is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of temporary support equipment, in particular to a telescopic driving device for temporary support. Background Art

[0002] The information disclosed in the background technology of the present invention is only intended to increase the understanding of the overall background of the present invention, and shall not necessarily be regarded as an admission or suggestion in any form that the information constitutes the prior art already known to those skilled in the art.

[0003] When tunneling underground in coal mines, as the tunneling work progresses, the original stratum balance is broken and the surrounding rock stress is redistributed. Especially in weak, broken or water-containing coal and rock layers, the roof and two sides are prone to collapse, forming an empty roof and empty side phenomenon, which poses a great safety hazard. If effective support measures are not taken, it may cause tunnel deformation and even cause serious roof collapse accidents, threatening the lives of underground workers.

[0004] Traditional temporary support methods, such as wood piles, point columns, front exploration beams, anchor rods and cables, can play a supporting role to a certain extent, but there are obvious shortcomings in efficiency. Due to the complex support process, long construction period and high labor intensity of workers, it is impossible to quickly keep up with the pace of high-speed excavation, resulting in the "time difference" between excavation and support, that is, the so-called "empty top time" is too long, which restricts the improvement of coal mine excavation efficiency. With the increase in coal mining depth, the increasingly complex mining conditions and the continuous improvement of safety production and economic benefits, in recent years, the application of a series of new technologies and new materials such as airborne advance support technology, prestressed anchor cables, intelligent hydraulic supports, and composite material support structures has greatly improved the ability of advance temporary support.

[0005] However, the seals of the hydraulic drive system of the existing temporary support equipment work in the harsh environment of coal mines for a long time, and are easily affected by factors such as dust, moisture, and corrosive gases, which can easily lead to seal failure and hydraulic oil leakage, which not only pollutes the environment, but also affects the normal telescopic operation of the hydraulic cylinder. In addition, when the hydraulic cylinder is subjected to high loads, frequent telescopic movements, and large temperature fluctuations, the telescopic movement stability is easily affected, and the wear of internal parts is aggravated, which greatly shortens the service life. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a telescopic drive device for temporary support. The main component of the hydraulic cylinder is installed inside the telescopic sleeve, which not only solves the problem of insufficient space, but also improves the overall strength and sealing of the telescopic drive device, thereby improving the stability of the hydraulic telescopic drive device and increasing its service life.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A telescopic drive device for temporary support, comprising a hydraulic cylinder body, the hydraulic cylinder body comprising a cylinder barrel, a cylinder cover, a piston body and a piston rod, the extended end of the piston rod is sleeved with an inner sleeve, and the driving end of the piston rod and the inner sleeve are connected and fixed by a first connecting flange provided with an adaptor;

[0009] The outer side of the cylinder barrel is sleeved with an outer sleeve, the base end of the cylinder barrel is installed with a bottom cylinder cover, and the other end is provided with a top cylinder cover, and the outer sleeve, the cylinder barrel and the bottom cylinder cover are sealed and fixed by a second matching connecting flange;

[0010] At least one intermediate sleeve is provided between the inner sleeve and the outer sleeve, a multi-stage telescopic sleeve is formed between the inner sleeve, the intermediate sleeve and the outer sleeve, and an adapted guide sleeve is provided inside the intermediate sleeve;

[0011] The inner side of the guide sleeve is provided with a lubrication groove, and the lubrication groove and the piston rod or the intermediate sleeve that is fitted therewith form a lubrication cavity, and the lubrication cavity is provided with a lubrication oil pipe;

[0012] A first sealing ring is arranged between the top cylinder cover and the piston rod.

[0013] Preferably, second sealing rings are provided at both ends of the lubrication groove on the inner side of the guide sleeve.

[0014] Further, a first oil chamber is formed between the bottom cylinder cover and the piston body, and a second oil chamber is formed between the top cylinder cover and the piston body;

[0015] The first oil chamber and the second oil chamber are respectively provided with corresponding oil ports and hydraulic oil pipes thereof.

[0016] Preferably, a wiring groove for cooperating with the lubricating oil pipe and the hydraulic oil pipe is opened on the inner side of the outer sleeve.

[0017] Preferably, correspondingly adapted guide sliders and guide grooves are provided between the sleeves of the multi-stage telescopic sleeve.

[0018] Preferably, an intermediate sleeve is sleeved between the inner sleeve and the outer sleeve, and a three-stage telescopic sleeve is formed between the inner sleeve, the intermediate sleeve and the outer sleeve.

[0019] The utility model includes but is not limited to the following beneficial effects:

[0020] The utility model organically combines the hydraulic oil cylinder body inside the telescopic sleeve, effectively utilizes the space, can effectively improve the strength of the hydraulic telescopic drive device, and improves its sealing performance, thereby improving its anti-pollution ability and service life, which is beneficial to the stable and efficient operation of temporary support equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0023] The reference numerals involved in the accompanying drawings are:

[0024] 1. Inner sleeve; 2. Middle sleeve; 3. Outer sleeve; 4. Cylinder barrel; 41. Bottom cylinder cover; 411. Oil port; 42. Top cylinder cover; 421. First sealing ring; 43. Second connecting flange; 5. Piston rod; 51. First connecting flange; 6. Piston body; 7. Guide sleeve; 71. Lubrication chamber; 8. Lubricating oil pipe; 81. Wire groove; 9. Second sealing ring. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 to Figure 2 A telescopic drive device for temporary support is shown, comprising a hydraulic cylinder body, the hydraulic cylinder body comprising a cylinder barrel 4, a cylinder head, a piston body 6 and a piston rod 5, the protruding end of the piston rod 5 is sleeved with an inner sleeve 1, the piston rod 5 and the driving end of the inner sleeve 1 are connected and fixed by a first matching connecting flange 51, which protects the piston rod 5, enhances its strength and increases its service life;

[0027] The outer sleeve 3 is sleeved on the outside of the cylinder barrel 4, a bottom cylinder cover 41 is installed on the base end of the cylinder barrel 4, and a top cylinder cover 42 is arranged on the other end. The outer sleeve 3, the cylinder barrel 4 and the bottom cylinder cover 41 are sealed and fixed by a second connecting flange 43 provided with an adapter. The three are fixedly connected as an integral structure, so that the hydraulic cylinder body and the outer sleeve are organically combined, thereby greatly enhancing the strength of the cylinder barrel 4; Figure 1 As shown, the second connecting flange 43 of the cylinder barrel 4 is placed in the middle, and the second connecting flanges 43 of the outer sleeve 3 and the bottom cylinder cover 41 are placed on both sides respectively, and a sealing gasket may be provided between the bottom cylinder cover 41 and the second connecting flange 43 of the cylinder barrel 4 to achieve a sealed connection;

[0028] At least one intermediate sleeve 2 is provided between the inner sleeve 1 and the outer sleeve 3, the inner sleeve 1 is provided inside the intermediate sleeve 2, and a multi-stage telescopic sleeve is formed between the inner sleeve 1, the intermediate sleeve 2 and the outer sleeve 3, so that the strength of the main body of the hydraulic cylinder is enhanced and its sealing performance is improved, thereby improving the overall stability of the hydraulic telescopic drive device and increasing its service life;

[0029] An adapted guide sleeve 7 is provided inside the intermediate sleeve 2 to facilitate maintaining the telescopic smoothness of the multi-stage telescopic sleeve, thereby facilitating the smoothness of the telescopic movement of the piston rod 5, and further facilitating the overall stability and service life of the telescopic drive device of the temporary support;

[0030] The guide sleeve 7 is provided with a lubrication groove inside, and the lubrication groove and the piston rod 5 or the intermediate sleeve 2 which are fitted therewith form a lubrication cavity 71, and the lubrication cavity 71 is provided with a lubrication oil pipe 8, so as to further improve the smoothness of the telescopic movement of the piston rod 5;

[0031] A first oil chamber is formed between the bottom cylinder cover 41 and the piston body 6, a second oil chamber is formed between the top cylinder cover 42 and the piston body 6, and a first sealing ring 421 is provided between the top cylinder cover 42 and the piston rod 5 to ensure the sealing of the second oil chamber, thereby ensuring the stability of the hydraulic drive;

[0032] Second sealing rings 9 are provided at both ends of the lubrication groove inside the guide sleeve to prevent the lubrication oil from overflowing and to scrape the oil, thereby improving the lubrication efficiency.

[0033] The first oil chamber and the second oil chamber are respectively provided with corresponding oil ports 411 and hydraulic oil pipes thereof, and the inner side of the outer sleeve 3 is provided with a wiring groove 81 for matching the lubricating oil pipe 8 and the hydraulic oil pipe, thereby ensuring smooth oil circuit layout.

[0034] Correspondingly adapted guide sliders and guide grooves are arranged between the sleeves of the multi-stage telescopic sleeve, so as to further improve the stability and reliability of the overall device.

[0035] An intermediate sleeve 2 is arranged between the inner sleeve 1 and the outer sleeve 3. The inner sleeve 1, the intermediate sleeve 2 and the outer sleeve 3 form a three-stage telescopic sleeve. Based on the appropriate length, this is the optimal solution.

[0036] In summary, the telescopic drive device for temporary support has the following beneficial effects:

[0037] By organically combining the main body of the hydraulic cylinder inside the telescopic sleeve, the space is effectively utilized, the compactness and integration of the overall device are enhanced, while the pressure resistance and sealing performance of the equipment are improved, and the problems of hydraulic system sealing failure and hydraulic oil leakage caused by environmental factors are reduced.

[0038] A multi-stage telescopic sleeve design is adopted, including an inner sleeve 1, a middle sleeve 2 and an outer sleeve 3. The sleeves cooperate with each other through guide sliders and guide grooves, which not only enhances the structural strength of the hydraulic cylinder body, but also ensures the smoothness and stability of the piston rod 5 during the extension and retraction process, reduces the wear of internal parts, and extends the service life of the device.

[0039] The guide sleeve 7 and the lubrication groove are provided to cooperate with the lubrication oil pipe 8 to supply oil to the lubrication cavity 71, which effectively ensures that the piston rod 5 is fully lubricated during the extension and retraction process, reduces friction resistance, and improves driving efficiency and stability.

[0040] A first sealing ring 421 is arranged at key positions such as the first oil chamber and the second oil chamber, and a second sealing ring 9 is arranged at both ends of the lubrication groove inside the guide sleeve 7, so as to enhance the sealing effect, ensure the hydraulic oil pressure, prevent the leakage of the lubricating oil, and ensure the stable operation of the hydraulic system and the lubrication effect of the telescopic mechanism.

[0041] Taking the oil circuit layout and maintenance convenience into consideration, a wiring groove 81 for the lubricating oil pipe 8 and the hydraulic oil pipe is specially designed on the inner side of the outer sleeve 3, which optimizes the oil circuit layout and further improves the overall reliability and safety of the device.

[0042] Through the design of the optimal solution three-stage telescopic sleeve, this application can meet the support needs while taking into account the lightweight and high efficiency of the equipment, adapt to the complex and harsh working environment underground in coal mines, significantly improve the response speed and support effect of temporary support, help reduce the "empty top time", and ensure the efficient and safe progress of coal mine excavation work.

[0043] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0044] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic drive device for temporary support, comprising a hydraulic cylinder body, wherein the hydraulic cylinder body comprises a cylinder barrel, a cylinder cover, a piston body and a piston rod thereof, and is characterized in that: The extended end of the piston rod is sleeved with an inner sleeve, and the piston rod and the driving end of the inner sleeve are connected and fixed by a first matching connecting flange; The outer side of the cylinder barrel is sleeved with an outer sleeve, the base end of the cylinder barrel is installed with a bottom cylinder cover, and the other end is provided with a top cylinder cover, and the outer sleeve, the cylinder barrel and the bottom cylinder cover are sealed and fixed by a second matching connecting flange; At least one intermediate sleeve is provided between the inner sleeve and the outer sleeve, a multi-stage telescopic sleeve is formed between the inner sleeve, the intermediate sleeve and the outer sleeve, and an adapted guide sleeve is provided inside the intermediate sleeve; The inner side of the guide sleeve is provided with a lubrication groove, and the lubrication groove and the piston rod or the intermediate sleeve that is fitted therewith form a lubrication cavity, and the lubrication cavity is provided with a lubrication oil pipe; A first sealing ring is arranged between the top cylinder cover and the piston rod.

2. The telescopic drive device for temporary support according to claim 1, characterized in that: Second sealing rings are arranged at both ends of the lubrication groove inside the guide sleeve.

3. The telescopic drive device for temporary support according to claim 2, characterized in that: A first oil chamber is formed between the bottom cylinder cover and the piston body, and a second oil chamber is formed between the top cylinder cover and the piston body; The first oil chamber and the second oil chamber are respectively provided with corresponding oil ports and hydraulic oil pipes thereof.

4. The telescopic drive device for temporary support according to claim 3, characterized in that: A wiring groove matching the lubricating oil pipe and the hydraulic oil pipe is provided on the inner side of the outer sleeve.

5. The telescopic drive device for temporary support according to claim 1, characterized in that: Correspondingly adapted guide slide blocks and guide sliding grooves are arranged between the sleeves of the multi-stage telescopic sleeve.

6. The telescopic drive device for temporary support according to any one of claims 1 to 5, characterized in that: An intermediate sleeve is sleeved between the inner sleeve and the outer sleeve, and a three-stage telescopic sleeve is formed between the inner sleeve, the intermediate sleeve and the outer sleeve.

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