Side pushing device and hydraulic support

Abstract

A side pushing device (10) and a hydraulic support (30). The side pushing device (10) comprises: a cylinder bottom (100), on which a first oil port (110) and a second oil port (120) are arranged; and at least two telescopic mechanisms (200), respectively arranged on two opposite sides of the cylinder bottom (100). Each telescopic mechanism (200) comprises: a cylinder barrel (210) connected to the cylinder bottom (100); a piston rod (220) arranged in the cylinder barrel (210) and capable of extending and retracting in a length direction of the cylinder barrel (210); a piston (230) connected to the piston rod (220) and dividing an internal space of the cylinder barrel (210) into a rod cavity (212) and a rodless cavity (211) that are independent of each other; a first oil passage (240) communicating the first oil port (110) with the rodless cavity (211); and a second oil passage (250) communicating the second oil port (120) with the rod cavity (212).

Description

Side pushing device and hydraulic support

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411274801.7, filed on September 12, 2024, and entitled "Side pushing device and hydraulic support", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of hydraulic support, in particular to a side pushing device and a hydraulic support. BACKGROUND

[0004] The hydraulic support is an important supporting device of the fully mechanized working face, which is used to protect the safety of the workers and the fully mechanized equipment. The side pushing jacks and the side guard plates are usually arranged on the top beam and the shield beam to prevent the gap between the adjacent supports.

[0005] In order to improve the adaptability of the hydraulic support, the design of the double side guard plates is generally required by the mine side at present, so that the extension and retraction of the side guard plates on the left and right sides can be switched according to the conditions of the working face.

[0006] However, in actual application, the side pushing jacks need to be reassembled when the extension and retraction of the side guard plates on the left and right sides are switched. The reassembly of the side pushing jacks has a large workload, and the operation is more difficult in the underground, and the safety is poor. At the same time, the pipeline needs to be reconnected, and the working environment of the hydraulic support is generally a dusty and coal ash environment. Each disassembly and assembly may cause pollution of the system and may cause the failure of the column jacks and the hydraulic valves. SUMMARY

[0007] The present application aims at one of the technical problems existing in the related art.

[0008] Therefore, the first aspect of the present application is to provide a side pushing device.

[0009] The second aspect of the present application is to provide a hydraulic support.

[0010] Therefore, according to the first aspect of the present application, a side pushing device is provided, which comprises: a cylinder bottom, a first oil port and a second oil port being arranged on the cylinder bottom; at least two extension and retraction mechanisms being arranged on opposite sides of the cylinder bottom; wherein the extension and retraction mechanism comprises: a cylinder barrel connected with the cylinder bottom; a piston rod arranged in the cylinder barrel and capable of extending and retracting along the length direction of the cylinder barrel; a piston connected with the piston rod and separating the internal space of the cylinder barrel into a rod cavity and a rodless cavity; a first oil passage connecting the first oil port and the rodless cavity; and a second oil passage connecting the second oil port and the rod cavity.

[0011] Compared with the existing single-piston hydraulic telescopic device, the side pushing device provided in the above embodiments can drive the two side guards on both sides to perform telescopic movement respectively through the piston rods of the two telescopic mechanisms, and the movement state of the side guards on both sides can be flexibly adjusted by respectively controlling the actions of the two telescopic mechanisms to meet specific work requirements. Therefore, the rubber pipe does not need to be disassembled and reassembled when switching the telescopic movement of the side guards on both sides, and the switching operation is convenient, thereby avoiding the entry of dust, coal ash and the like into the hydraulic system, helping to improve the system reliability, and being more efficient and safe. Meanwhile, the first oil port and the second oil port are shared by the two telescopic mechanisms, and such a design not only reduces the number of pipelines, thereby simplifying the pipeline layout, but also helps to improve the space utilization rate, making the entire system more compact. Meanwhile, such a design makes the entire installation process simpler and faster.

[0012] In some technical solutions, the telescopic mechanism further comprises a liquid passage pipe; wherein a cylinder cavity is formed in the piston rod by inwardly recessing an end of the piston rod adjacent to the cylinder bottom, and the cylinder cavity is in communication with the rod cavity; the liquid passage pipe is arranged in the cylinder cavity and is in communication with the second oil passage, and the liquid passage pipe is in sliding fit with the piston rod.

[0013] In the above technical solution, the second oil passage and the rod cavity are communicated through the liquid passage pipe, the cylinder cavity and the liquid passage hole, thereby constructing a liquid inlet and return circuit. When the piston rod needs to be retracted, hydraulic oil can enter the rod cavity through the liquid passage hole, thereby pushing the piston rod to move towards the cylinder bottom, to realize the retraction action. When the piston rod needs to be extended, hydraulic oil enters the rodless cavity through the first oil passage, thereby pushing the piston rod to move away from the cylinder bottom, to realize the extension action, and at this time, the hydraulic oil in the rod cavity enters the cylinder cavity through the liquid passage hole.

[0014] In some technical solutions, the side pushing device further comprises a first sealing mechanism, which is arranged between the piston rod and the piston, thereby ensuring the mutual independence between the rodless cavity and the rod cavity.

[0015] In some technical solutions, the telescopic mechanism further comprises a guide sleeve; the guide sleeve is arranged at an end of the cylinder barrel away from the cylinder bottom, and the guide sleeve is in sliding fit with the piston rod. By arranging the guide sleeve, the piston rod can be prevented from deviating during telescopic movement, and the guide sleeve can also provide necessary support force for the piston rod, thereby preventing the piston rod from being deformed.

[0016] In some technical solutions, the side pushing device further comprises a second sealing mechanism, which is arranged between the guide sleeve and the piston rod to form a seal therebetween; the second sealing mechanism is in sliding fit with the piston rod. In this way, leakage can be avoided, thereby helping to improve the reliability of the side pushing device.

[0017] In some embodiments, a groove is formed on the inner wall of the guide sleeve, and a guide ring is arranged in the groove, and the guide ring is in sliding fit with the piston rod.

[0018] In the above technical solution, by arranging the guide ring, the piston rod and the guide sleeve are prevented from directly contacting and rubbing, thereby reducing the risk of wear and leakage.

[0019] According to a second aspect of the present application, the present application further provides a hydraulic support, comprising a beam body, a side guard and the side pushing device according to any one of the above technical solutions; wherein the cylinder bottom is connected with the piston rod, and the side guard is connected with the beam body. Thus, the hydraulic support has all the beneficial effects of any one of the above technical solutions, which will not be repeated here.

[0020] In some embodiments, a first connecting hole is arranged on the cylinder bottom and the beam body; and the hydraulic support further comprises a first connecting piece which is detachably installed in the first connecting hole.

[0021] In the above technical solution, the first connecting piece is inserted into the first connecting hole to connect the cylinder bottom and the beam body, thereby fixing the side pushing device on the beam body; at the same time, since the first connecting piece is detachable, it can be easily taken out of the first connecting hole when needed, thereby realizing the quick separation of the cylinder bottom and the beam body. Such detachability greatly improves the adaptability and flexibility of the hydraulic support, so that it can better adapt to different working conditions and requirements.

[0022] In some embodiments, a second connecting hole is arranged on the piston rod and the beam body; and the hydraulic support further comprises a second connecting piece which is detachably installed in the second connecting hole.

[0023] In the above technical solution, the second connecting piece is inserted into the second connecting hole to connect the piston rod and the beam body, thereby locking the piston rod. In this way, one of the piston rods can be inoperative, and the other piston rod can be in telescopic movement under the action of hydraulic oil to drive the side guard to expand or retract relative to the beam body, thereby realizing the adjustment of the position of the side guard, so as to meet the demand of the side pushing device for adjusting the single side guard.

[0024] In some embodiments, a third connecting hole is arranged on the side guard and the piston rod; and the hydraulic support further comprises a third connecting piece which is detachably installed in the third connecting hole.

[0025] In the above embodiment, the third connecting piece is inserted into the third connecting hole to connect the side guard and the piston rod. In this way, when it is needed to adjust the side guard, the third connecting piece can be taken out of the third connecting hole to complete the disassembly of the side guard.

[0026] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0028] FIG. 1 shows a structural schematic diagram of a side pushing device in embodiments of the present application;

[0029] FIG. 2 shows a structural schematic diagram of a hydraulic support in embodiments of the present application.

[0030] In FIGS. 1 and 2, the correspondence between the reference signs and the component names is as follows: 10-side pushing device; 100-cylinder bottom; 110-first oil port; 120-second oil port; 200-telescopic mechanism; 210-cylinder barrel; 211-rodless cavity; 212-rod cavity; 220-piston rod; 221-barrel cavity; 222-liquid passage hole; 230-piston; 240-first oil path passage; 250-second oil path passage; 260-liquid passage pipe; 270-guide sleeve; 271-groove; 272-guide ring; 300-first sealing mechanism; 400-second sealing mechanism; 30-hydraulic support; 31-beam body; 32-side guard plate; 33-first connecting hole; 34-first connecting piece; 35-second connecting hole; 36-second connecting piece; 37-third connecting hole; 38-third connecting piece. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0033] The side pushing device and the hydraulic support provided by the embodiments of the present application will be described in detail below in conjunction with FIGS. 1 and 2 through specific embodiments and application scenarios.

[0034] Referring to FIG. 1, some embodiments of the present application propose a side pushing device 10, which includes a cylinder bottom 100 and at least two telescopic mechanisms 200.

[0035] Specifically, the cylinder bottom 100 is provided with a first oil port 110 and a second oil port 120.

[0036] The telescopic mechanism 200 comprises a cylinder 210, a piston rod 220, a piston 230, a first oil passage 240 and a second oil passage 250. The cylinder 210 is connected with the cylinder bottom 100; the piston rod 220 is arranged in the cylinder 210 and can extend and retract along the length direction (X direction in FIG. 2) of the cylinder 210; the piston 230 is connected with the piston rod 220 and divides the internal space of the cylinder 210 into a rodless cavity 211 and a rod cavity 212 which are independent of each other; the first oil passage 240 connects the first oil port 110 with the rodless cavity 211 so as to make the piston rod 220 extend; and the second oil passage 250 connects the second oil port 120 with the rod cavity 212 so as to make the piston rod 220 retract.

[0037] Compared with the existing single-piston hydraulic telescopic device, the side pushing device 10 proposed in the above embodiment can drive the two side guards on the two sides to extend and retract respectively through the piston rods 220 of the two telescopic mechanisms 200, can flexibly adjust the movement state of the side guards on the two sides by respectively controlling the actions of the two telescopic mechanisms 200, and can meet the specific work requirements. Therefore, the rubber pipes do not need to be disassembled and reassembled when the extension and retraction of the side guards on the left and right sides are switched, the operation is convenient when the extension and retraction of the side guards on the left and right sides are switched, and thus the dust, coal ash and the like can be prevented from entering the hydraulic system, the system reliability can be improved, and the system is more efficient and safe. Meanwhile, the first oil port 110 and the second oil port 120 are shared by the two telescopic mechanisms 200. This design not only reduces the number of pipes and thus simplifies the pipe layout, but also helps to improve the space utilization and make the whole system more compact. Meanwhile, this design makes the whole installation process simpler and faster.

[0038] In some embodiments, the telescopic mechanism 200 further comprises a liquid passage pipe 260. The one end of the piston rod 220 adjacent to the cylinder bottom 100 is recessed inward to form a cylinder cavity 221, and the cylinder cavity 221 is connected with the rod cavity 212 through a liquid passage hole 222. The liquid passage pipe 260 is arranged in the cylinder cavity 221 and is connected with the second oil passage 250, and the liquid passage pipe 260 and the piston rod 220 are in sliding fit.

[0039] In the above embodiment, the second oil passage 250 and the rod cavity 212 are connected through the liquid passage pipe 260, the cylinder cavity 221 and the liquid passage hole 222, and a liquid inlet and return circuit is constructed. When the piston rod 220 needs to retract, the hydraulic oil can enter the rod cavity 212 through the liquid passage hole 222, so as to push the piston rod 220 to move toward the cylinder bottom 100 and realize the retraction action. When the piston rod 220 needs to extend, the hydraulic oil enters the rodless cavity 211 through the first oil passage 240, so as to push the piston rod 220 to move away from the cylinder bottom 100 and realize the extension action. At this time, the hydraulic oil in the rod cavity 212 enters the cylinder cavity 221 through the liquid passage hole 222.

[0040] In actual application, the cylinder cavity 221 and the piston rod 220 are coaxially arranged. In this way, the abrasion caused by deviation can be avoided, thereby helping to improve the service life of the whole device.

[0041] In some embodiments, in order to prevent internal leakage, a first sealing mechanism 300 is arranged between the piston 230 and the piston rod 220 to form a seal between the piston 230 and the piston rod 220, thereby ensuring the mutual independence between the rodless cavity 211 and the rod cavity 212.

[0042] Exemplarily, the first sealing mechanism 300 adopts a sealing ring (such as an O-shaped sealing ring). It can be understood that the present embodiment is not limited thereto, and in actual application, a suitable sealing structure can be selected according to actual needs.

[0043] In some embodiments, the telescopic mechanism 200 further comprises a guide sleeve 270. The guide sleeve 270 is arranged at the end of the cylinder 210 away from the cylinder bottom 100, and the guide sleeve 270 and the piston rod 220 are in sliding fit. By arranging the guide sleeve 270, the deviation of the piston rod 220 during telescopic movement can be avoided, and at the same time, the guide sleeve 270 can also provide necessary support force for the piston rod 220, thereby preventing the deformation of the piston rod 220.

[0044] In the above embodiment, a second sealing mechanism 400 is arranged between the guide sleeve 270 and the piston rod 220 to form a seal between the guide sleeve 270 and the piston rod 220. The second sealing mechanism 400 and the piston rod 220 are in sliding fit. In this way, the external leakage can be avoided, thereby helping to improve the reliability of the side thruster.

[0045] In some embodiments, the second sealing mechanism 400 comprises a dustproof ring and a sealing ring. This combined structure not only effectively prevents external impurities from entering the inside of the cylinder 210, but also ensures that the hydraulic oil inside the cylinder 210 will not leak to the outside.

[0046] In actual application, the guide sleeve 270 and the cylinder 210 are screwed. In this way, when maintenance or replacement is needed, the screwing mode makes the disassembly process simple and fast, and after disassembly, the internal situation can be directly observed.

[0047] In some embodiments, a groove 271 is arranged on the inner wall surface of the guide sleeve 270, a guide ring 272 is arranged in the groove 271, and the guide ring 272 and the piston rod 220 are in sliding fit. By arranging the guide ring 272, the direct contact and friction between the piston rod 220 and the guide sleeve 270 can be prevented, thereby helping to reduce the risk of abrasion and leakage.

[0048] Exemplarily, the guide ring 272 is made of wear-resistant and corrosion-resistant material.

[0049] With reference to FIGS. 1 and 2, in some embodiments, the application further provides a hydraulic support 30 comprising a beam body 31, a side guard 32, and the side pushing device 10 of any of the above embodiments. The cylinder bottom 100 is connected to the beam body 31, and the piston rod 220 is connected to the side guard 32. Thus, the hydraulic support 30 has all the advantages of any of the above embodiments, which will not be repeated here.

[0050] In some embodiments, the cylinder bottom 100 and the beam body 31 are provided with a first connecting hole 33. The hydraulic support 30 further comprises a first connecting piece 34 which is detachably installed in the first connecting hole 33.

[0051] In the above embodiment, the first connecting piece 34 is inserted into the first connecting hole 33 to connect the cylinder bottom 100 and the beam body 31, thereby fixing the side pushing device 10 on the beam body 31. At the same time, since the first connecting piece 34 is detachable, it can be easily removed from the first connecting hole 33 when needed, thereby quickly separating the cylinder bottom 100 and the beam body 31. This detachability greatly improves the adaptability and flexibility of the hydraulic support 30, making it better adapt to different working conditions and requirements.

[0052] In some embodiments, the piston rod 220 and the beam body 31 are provided with a second connecting hole 35. The hydraulic support 30 further comprises a second connecting piece 36 which is detachably installed in the second connecting hole 35.

[0053] In the above embodiment, the second connecting piece 36 is inserted into the second connecting hole 35 to connect the piston rod 220 and the beam body 31, thereby locking the piston rod 220. In this way, one of the piston rods 220 can be inoperative, while the other piston rod 220 can be in telescopic motion under the action of hydraulic oil to drive the side guard 32 to expand or retract relative to the beam body 31, thereby adjusting the position of the side guard 32, which can meet the demand of the side pushing device for adjusting the single side guard 32, and the structure is simple and convenient to assemble.

[0054] In some embodiments, the side guard 32 and the piston rod 220 are provided with a third connecting hole 37. The hydraulic support 30 further comprises a third connecting piece 38 which is detachably installed in the third connecting hole 37.

[0055] In the above embodiment, the third connecting piece 38 is inserted into the third connecting hole 37 to connect the side guard 32 and the piston rod 220. In this way, when it is necessary to adjust the side guard 32, the third connecting piece 38 can be removed from the third connecting hole 37 to complete the disassembly of the side guard 32, and the structure is simple and convenient to assemble.

[0056] In some embodiments, the first connecting member 34, the second connecting member 36 and the third connecting member 38 are pin shafts. It can be understood that in actual applications, the first connecting member 34, the second connecting member 36 and the third connecting member 38 can also be other structure members satisfying the requirements, such as screws, etc., and the embodiments are not limited thereto.

[0057] It should be noted that in the claims, the specification and the drawings of the present application, the term "multiple" refers to two or more than two, unless otherwise explicitly limited, the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and making the description process more simple, and are not intended to indicate or imply that the device or element must have the described specific orientation, be constructed and operated in a specific orientation, therefore these descriptions cannot be understood as a limitation on the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0058] In the claims, the specification and the drawings of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, the specification and the drawings of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above is only an optional embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A side thruster device, characterized in that The utility model relates to a hydraulic support, comprising: a cylinder bottom, wherein a first oil port and a second oil port are arranged on the cylinder bottom; at least two telescopic mechanisms are arranged on opposite sides of the cylinder bottom; wherein the telescopic mechanism comprises: a cylinder barrel connected with the cylinder bottom; a piston rod arranged in the cylinder barrel and capable of telescoping along the length direction of the cylinder barrel; a piston connected with the piston rod and separating the internal space of the cylinder barrel into a rodless chamber and a rod chamber; a first oil passage connecting the first oil port and the rodless chamber; a second oil passage connecting the second oil port and the rod chamber.

2. The side thruster according to claim 1, characterized in that The telescopic mechanism further comprises a liquid passage pipe; wherein a barrel cavity is formed inside the piston rod, the barrel cavity is formed by inwardly recessing the end of the piston rod adjacent to the cylinder bottom, and the barrel cavity is connected with the rod chamber; the liquid passage pipe is arranged in the barrel cavity and connected with the second oil passage, and the liquid passage pipe is in sliding fit with the piston rod.

3. The side thruster according to claim 2, characterized in that The telescopic mechanism further comprises a first sealing mechanism arranged between the piston rod and the piston.

4. The side thruster according to claim 1, characterized in that The telescopic mechanism further comprises a guide sleeve, wherein the guide sleeve is arranged at the end of the cylinder barrel away from the cylinder bottom, and the guide sleeve is in sliding fit with the piston rod.

5. The side thruster according to claim 4, characterized in that The telescopic mechanism further comprises a second sealing mechanism arranged between the guide sleeve and the piston rod.

6. The side thruster according to claim 5, characterized in that A groove is arranged on the inner wall surface of the guide sleeve, a guide ring is arranged in the groove, and the guide ring is in sliding fit with the piston rod.

7. A hydraulic support, characterized in that The utility model relates to a side-pushing device, comprising a beam body, a side guard plate and a telescopic mechanism as claimed in any one of claims 1 to 6. The cylinder bottom is connected with the beam body. The piston rod is connected with the side guard plate.

8. The hydraulic support according to claim 7, characterized in that The cylinder bottom and the beam body are provided with a first connecting hole. The hydraulic support further comprises a first connecting piece which is detachably installed in the first connecting hole.

9. The hydraulic support of claim 7, wherein, The piston rod and the beam body are provided with a second connecting hole. The hydraulic support further comprises a second connecting piece which is detachably installed in the second connecting hole.

10. The hydraulic support according to any one of claims 7 to 9, characterized in that The side guard plate and the piston rod are provided with a third connecting hole. The hydraulic support further comprises a third connecting piece which is detachably installed in the third connecting hole.

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