Split combined type light hydraulic supporting device

Abstract

The invention discloses a split combined type light hydraulic support device, which relates to the technical field of hydraulic supports, and comprises a left hydraulic support mechanism and a right hydraulic support mechanism which are symmetrically arranged and completely identical in structure and are connected through a connecting assembly; the two stand column structures are installed on the left hydraulic supporting mechanism and the right hydraulic supporting mechanism respectively, used for independently controlling the left hydraulic supporting mechanism or the right hydraulic supporting mechanism to ascend and descend to support the top plate and composed of cylinder barrels and lifting columns. The device has the beneficial effects that the device is composed of the two parts which are symmetrical left and right, the device can be conveniently disassembled into the two parts under a mine, the size is small, the weight is light, carrying is convenient, the two parts are connected into a whole in the using process, and the functions of supporting a top plate, pushing and sliding, pulling a frame and the like can be achieved; and the rear ends of the base plates are connected through the connecting base, and it can be guaranteed that the two bases are pulled synchronously.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support technology, and in particular to a modular lightweight hydraulic support device. Background Technology

[0002] Hydraulic support devices (hydraulic supports) are key equipment in fully mechanized coal mining processes, providing roof support and ensuring the functions of pushing and pulling the supports. Currently, the mechanization rate of coal mining in my country has reached 83%. However, in southern and southwestern my country, coal mines often have small working faces due to complex resource conditions, thin and unstable coal seams, and typically a strike length of 100m-200m and a dip length of 30m-80m. Large-scale fully mechanized coal mining is difficult to adapt to these conditions, which is the fundamental reason for the technological backwardness of small and medium-sized coal mines in southern my country.

[0003] Currently, there are two main challenges: First, the narrow roadways make it difficult to transport large equipment; second, due to the complex resource endowment conditions of coal mines, the working faces are usually small, and the frequent relocation of the working faces is time-consuming, labor-intensive, and inefficient. In order to realize the mechanized mining of such coal mines, it is necessary to develop a small and lightweight support device to meet the usage needs of the above mines and facilitate relocation.

[0004] Furthermore, due to the complex and harsh working environment of hydraulic support devices, often accompanied by adverse factors such as high humidity, high dust, strong vibration, and sudden changes in roof pressure, problems such as leakage, seal failure, or structural damage in the hydraulic system are very likely to occur. Once the column malfunctions (such as failure of the hydraulic control check valve, internal leakage in the cylinder, or piston rod breakage), or encounters sudden roof pressure (such as periodic pressure or rock bursts), the column will be unable to maintain its original support height, and the top beam will drop rapidly under the huge roof pressure, which can easily cause serious or even fatal injuries to the workers below. Existing hydraulic support devices mostly rely on the main hydraulic system for lifting and bearing, and lack emergency safety protection mechanisms in the event of main system failure or overload. Although some devices are equipped with mechanical locking structures, they often have a delayed response and are difficult to quickly and effectively lock the column in case of emergencies, failing to meet the actual needs of emergency escape in the well.

[0005] Therefore, it is necessary to invent a modular lightweight hydraulic support device to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a modular lightweight hydraulic support device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a split-type modular lightweight hydraulic support device, comprising a left hydraulic support mechanism and a right hydraulic support mechanism symmetrically arranged and structurally identical, connected by a connecting component; two column structures, respectively installed on the left and right hydraulic support mechanisms, used to independently control the lifting and lowering of the left or right hydraulic support mechanism to support the top plate, each consisting of a cylinder and a lifting column; a locking component, consisting of an extension plate and a lifting plate penetrating the extension plate, the extension plate being fixed to the cylinder, the lifting plate being connected to the lifting column, a toothed plate sliding inside the extension plate, the toothed plate being driven and connected to an external hydraulic system, and the side of the lifting plate having toothed grooves for temporary support in case of hydraulic support device failure; and a pushing mechanism, located between the left and right hydraulic support mechanisms and connected to them by a connecting component, used to push the scraper conveyor and the tie frame.

[0008] Preferably, it also includes a base with a front connecting rod and a rear connecting rod hinged to its upper part, a shield beam hinged to the upper part of the front connecting rod and the rear connecting rod, and the upper part of the shield beam is also connected to the bottom end of the cylinder; a top beam with its rear end hinged to the shield beam and its lower part connected to the top end of the lifting column for supporting the top plate; and a balancing jack with its two ends hinged to the shield beam and the top beam respectively.

[0009] Preferably, it also includes a telescopic beam that slides inside the top beam, with its rear end fixedly connected to the telescopic end of a telescopic jack fixed inside the top beam; a side guard plate, one end of which is hinged to the end of the telescopic beam away from the top beam; a bent lug fixed to the bottom end of the telescopic beam away from the side guard plate; a wide rod hinged to the bottom end of the telescopic beam away from the bent lug; a side guard jack hinged between the bent lug and the movable end of the wide rod; and a narrow rod hinged between the bottom of the side guard plate and the movable end of the wide rod.

[0010] Preferably, it also includes a flexible connecting chain link connected between the two bases near the front end; a connecting seat, the two ends of which are respectively hinged to the rear ends of the two bases; and a connecting shaft connected between the two top beams.

[0011] Preferably, it also includes a pusher frame, the rear end of which is hinged to the middle position of the front of the connecting seat, and a pusher rod sliding inside it. A pusher jack is provided between the top end of the pusher rod near the connecting seat and the top end of the pusher rod away from the connecting seat. A connector is hinged to the front end of the pusher rod by a hinge pin and is used to connect the scraper conveyor.

[0012] Preferably, it also includes a distribution ring, which is fixed to the top of the outer surface of the cylinder, and has an upper liquid chamber and a lower liquid chamber on its inner side. The upper liquid chamber is connected to the lower chamber of the cylinder, and the lower liquid chamber is connected to the upper chamber of the cylinder. A control valve assembly is fixed to the outside of the distribution ring, and has a lower liquid inlet hole and an upper liquid inlet hole through it. The lower liquid inlet hole is connected to the upper liquid chamber through a connecting hole one, and the upper liquid inlet hole is connected to the lower liquid chamber through a connecting hole two.

[0013] Preferably, it further includes a through-hole vertically disposed on the extension plate; a mounting cavity disposed on both sides of the through-hole, with a hydraulic cavity two connected to its outer side, the hydraulic cavity two being connected to the upper liquid cavity through an inlet hole one, and a hydraulic cavity one connected to its inner side, the hydraulic cavity one being connected to the lower liquid cavity through an inlet hole two; a mounting seat that slides and seals within the mounting cavity, with a sealing slide frame fixed to one end of its outer side away from the through-hole, the sealing slide frame sliding and sealing within the hydraulic cavity two; and a toothed plate disposed on the mounting seat, the toothed plate having a beveled bottom and a flat top.

[0014] Preferably, it also includes a compensation cavity, which is located inside the mounting base, and the toothed plate slides in the compensation cavity by means of a push spring.

[0015] Preferably, it also includes a sealing cover plate, which is sealed and fixed to the outside of the extension plate, and the outer sides of the through hole, the mounting cavity, the second hydraulic cavity and the first hydraulic cavity are all connected to the sealing cover plate.

[0016] Preferably, the lifting plate slides through the through-hole, the toothed groove has a bottom slope and a top flat surface, and also includes a safety sliding cavity, which is opened at the top of the lifting plate, and a linkage spring is fixed at its bottom end; an ear plate, whose bottom end slides in the safety sliding cavity and is fixedly connected to the linkage spring; a side rod, which is fixed to the top of the outside of the lifting column and is set through the ear plate; and a limiting plate, which is fixed to the bottom of the side of the lifting plate and is used to limit the upward movement of the lifting plate.

[0017] The beneficial effects and advantages of this invention are as follows: 1. This invention sets the device to consist of two symmetrical parts, which makes it easy to disassemble into two parts in the mine. It is small in size, light in weight, and easy to transport. When in use, the two parts are connected as a whole, which can realize functions such as supporting the roof, pushing the conveyor, and pulling the frame. By flexibly connecting the front ends of the two bases, the device has stronger adaptability to the base plate. Connecting the rear ends with connecting seats can ensure that the two bases can pull the frame synchronously.

[0018] 2. This invention provides mounting seats, sealing slide frames, and toothed plates on both sides of the through-hole. A second hydraulic chamber connected to the upper liquid chamber and a first hydraulic chamber connected to the lower liquid chamber are respectively located on both sides of the sealing slide frame. When the lifting column needs to be raised, the hydraulic medium enters the lower chamber of the cylinder through the lower chamber inlet and the upper liquid chamber, lifting the lifting column. Simultaneously, the medium flowing through the upper liquid chamber enters the second hydraulic chamber to push against the mounting seat, causing the toothed surface of the toothed plate to extend into the through-hole and engage with the toothed groove on the lifting plate. This prevents injury to workers caused by the sudden drop of the top beam when the column structure malfunctions or encounters sudden pressure from the top plate.

[0019] 3. The present invention features a split shield beam and a top beam combined with a double-balance jack structure, which allows the left and right hydraulic support mechanisms to work independently to support the top plate. At the same time, the two top beams are connected by a connecting shaft, which can better connect to the top and ensure support of the top plate.

[0020] 4. This invention provides telescopic beams and side guards at the front ends of both top beams, which can operate independently. For fractured top slabs, this invention can provide more timely support and prevent rockfall.

[0021] 5. The present invention provides a compensating sliding cavity with matching toothed plates on the inner side of the mounting base, and installs the toothed plates in the compensating sliding cavity by means of a push spring. When the hydraulic chamber is filled with medium, the toothed surfaces of the toothed plates extend into the through sliding holes. When the lifting plate rises with the lifting column, the toothed plates are pushed into the compensating sliding cavity, thereby preventing the toothed plates from blocking the sliding of the lifting plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the top beam of the present invention; Figure 3 This is a schematic diagram of the front structure of the present invention; Figure 4 This is a schematic diagram of the pushing mechanism structure of the present invention; Figure 5 This is a schematic diagram of the column structure of the present invention; Figure 6 This is a schematic diagram of the extension plate structure of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the lifting plate structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic cross-sectional view of the extension plate of the present invention; Figure 10 This is a schematic diagram of the extension plate structure of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the mounting base structure of the present invention; Figure 12 This is a schematic diagram of the distribution ring cross-sectional structure of the present invention. Figure 1 ; Figure 13 This is a schematic diagram of the distribution ring cross-sectional structure of the present invention. Figure 2 ; Figure 14 This is a schematic diagram of the ear plate structure of the present invention.

[0023] In the picture: 1. Left hydraulic support mechanism; 11. Right hydraulic support mechanism; 12. Base; 13. Front connecting rod; 14. Rear connecting rod; 15. Protective beam; 16. Balance jack; 3. Connecting components; 31. Flexible connecting chain link; 32. Connecting seat; 33. Connecting shaft; 4. Column structure; 41. Cylinder; 42. Lifting column; 421. Side rod; 5. Locking assembly; 51. Extension plate; 511. Toothed plate; 512. Through-hole; 513. Mounting cavity; 514. Hydraulic cavity two; 515. Inlet hole one; 516. Hydraulic cavity one; 517. Inlet hole two; 52. Lifting plate; 521. Toothed groove; 522. Ear plate; 523. Limiting plate; 524. Safety slide cavity; 525. Linkage spring; 53. Distribution ring; 531. Upper liquid cavity; 532. Lower liquid cavity; 54. Control valve assembly; 541. Lower cavity inlet hole; 542. Upper cavity inlet hole; 543. Connecting hole one; 544. Connecting hole two; 55. Mounting base; 551. Sealing slide frame; 552. Compensating slide cavity; 553. Pushing spring; 56. Sealing cover plate; 6. Pushing mechanism; 61. Pushing frame; 62. Pushing rod; 63. Pushing jack; 64. Connector; 641. Hinge pin; 7. Top beam; 71. Telescopic beam; 711. Telescopic jack; 72. Side guard plate; 721. Bent lug seat; 722. Wide bar; 723. Side guard jack; 724. Narrow bar; Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides, for example Figures 1 to 13The illustrated modular lightweight hydraulic support device includes a left hydraulic support mechanism 1 and a right hydraulic support mechanism 11, which are symmetrically arranged and structurally identical, connected by a connecting component 3; two column structures 4, respectively mounted on the left hydraulic support mechanism 1 and the right hydraulic support mechanism 11, used to independently control the lifting and lowering of the left hydraulic support mechanism 1 or the right hydraulic support mechanism 11 to support the roof, each consisting of a cylinder 41 and a lifting column 42; and a locking component 5, consisting of an extension plate 51 and a lifting plate penetrating the extension plate 51. The system consists of 52 components: an extension plate 51 fixed to a cylinder 41; a lifting plate 52 connected to a lifting column 42; a toothed plate 511 sliding inside the extension plate 51; the toothed plate 511 being driven and connected to an external hydraulic system; and a toothed groove 521 on the side of the lifting plate 52 for temporary support in case of a malfunction of the hydraulic support device. A pushing mechanism 6 is located between the left hydraulic support mechanism 1 and the right hydraulic support mechanism 11, and is connected to both via a connecting assembly 3, for pushing the scraper conveyor and the pull frame.

[0026] Specifically, it also includes a base 12, with a front connecting rod 13 and a rear connecting rod 14 hinged to its upper part. A shield beam 15 is hinged to the upper part of the front connecting rod 13 and the rear connecting rod 14, and its upper part is also connected to the bottom end of the cylinder 41. A top beam 7 is hinged to the rear end of the shield beam 15 and to the top of the lifting column 42 at its lower part, used to support the roof. The top beam 7 directly contacts the roof, supports the roof, bears the pressure of the roof, and transmits the pressure to the bottom plate through the shield beam 15, the front connecting rod 13, the rear connecting rod 14, and the base 12, providing sufficient safety space for the longwall face. The top beam 7 adopts an integral structure, with the main body using... The steel plate welded box-shaped variable cross-section structure is simple in structure, has a large end load, and can effectively control the roof, preventing the pressure from the upper roof from transferring towards the coal wall and reducing spalling. The shield beam 15 bears the horizontal component and lateral force from the roof, enhancing the torsional performance of the device. It forms a four-bar linkage with the front connecting rod 13, the rear connecting rod 14, and the base 12, ensuring that the beam end distance does not change significantly and can prevent the rear gangue from moving forward, maintaining the working space. The shield beam 15 of this device is a left-right symmetrical split box-shaped variable cross-section structure, welded from steel plates. To ensure that the shield beam 15 has sufficient strength, it is connected to the top beam 7... Reinforcing plates are welded to the connection points of the front connecting rod 13 and the rear connecting rod 14, and reinforcing plates are also present at the corresponding dangerous sections and dangerous welds. The front connecting rod 13 and the rear connecting rod 14 minimize the change in the distance between the front end of the top beam 7 and the coal wall (i.e., the beam end distance) within the height adjustment range, thus providing better roof support and withstanding the horizontal and lateral forces of the roof, preventing the column structure 4 from being affected by lateral forces. The front connecting rod 13 and the rear connecting rod 14 of this device adopt a single-link structure; the front connecting rod 13 is a one-piece machined steel plate structure, and the rear connecting rod 14 is a box-shaped structure welded from steel plates. The balancing jack 16... Its two ends are hinged to the shield beam 15 and the top beam 7 respectively; the split shield beam 15 and the top beam 7, together with the double balance jack 16 structure, enable the left hydraulic support mechanism 1 and the right hydraulic support mechanism 11 to work independently to support the top plate. At the same time, the two top beams 7 are connected by the connecting shaft 33, which can better connect to the top and ensure the support of the top plate; the parts of the left hydraulic support mechanism 1 and the right hydraulic support mechanism 11 are connected by the pin shaft to form a stable four-bar linkage mechanism, which has the ability to work independently to realize the support function, and can also be used together to realize the functions of supporting the top plate, pushing the slide, and pulling the frame.

[0027] Specifically, it also includes a telescopic beam 71, which slides inside the top beam 7, and its rear end is fixedly connected to the telescopic end of a telescopic jack 711 fixed inside the top beam 7; a side guard plate 72, one end of which is hinged to the end of the telescopic beam 71 away from the top beam 7; a bent lug 721 is fixed to the bottom end of the telescopic beam 71 away from the side guard plate 72; a wide rod 722 is hinged to the bottom end of the telescopic beam 71 away from the bent lug 721; a side guard jack 723 is hinged between the movable end of the bent lug 721 and the wide rod 722; and the side guard plate 72... A narrow rod 724 is hinged between the bottom and the movable end of the wide rod 722; the telescopic beam 71 adopts an internal telescopic type, and its main function is to provide temporary support for the roof. After the coal mining machine passes, it is permissible not to move the frame first, and the telescopic beam 71 can be extended to temporarily support the newly exposed roof. It can also be used to maintain the broken roof after the frame is moved. By setting telescopic beams 71 and side plates 72 at the front ends of the two roof beams 7, and allowing them to operate independently, the broken roof can be supported more promptly to prevent rockfall.

[0028] Specifically, it also includes a flexible connecting chain 31, which is connected between the two bases 12 near the front end; a connecting seat 32, whose two ends are respectively hinged to the rear ends of the two bases 12; the connecting seat 32 is a key structure for connecting the left hydraulic support mechanism 1 and the right hydraulic support mechanism 11, and has a certain adjustment range, and is also the key to connecting the pushing mechanism 6 with the hydraulic support device; a connecting shaft 33, which is connected between the two top beams 7; by setting this device to consist of two symmetrical parts, it is easy to disassemble into two parts in the mine, with small size, light weight, and convenient transportation. When in use, the two parts are connected as a whole, which can realize functions such as supporting the roof, pushing the conveyor, and pulling the frame. By flexibly connecting the front ends of the two bases 12, this device has stronger adaptability to the base plate. Connecting the rear ends through the connecting seat 32 can ensure that the two bases 12 pull the frame synchronously.

[0029] Specifically, it also includes a pushing frame 61, the rear end of which is hinged to the middle of the front of the connecting seat 32, and a pushing rod 62 sliding inside it. A pushing jack 63 is provided between the top end of the pushing rod 62 near the connecting seat 32 and the top end of the pushing rod 62 away from the connecting seat 32; a connecting head 64, which is hinged to the front end of the pushing rod 62 via a hinge pin 641, is used to connect the scraper conveyor; wherein the connecting head 64 serves as the connection point between the hydraulic support device and the scraper conveyor, and has a certain adjustment range to adapt to changes in the base plate. The pushing frame 61 and the pushing rod 62 form the main body of the pushing mechanism 6. Unlike the traditional structure, the pushing rod 62 moves linearly inside the pushing frame 61 and is limited by the pushing frame 61 to avoid interference between the pushing rod 62 and the base 12 when used together. The pushing jack 63 is mounted upright and has a floating piston structure to improve the pushing efficiency, making the pulling force greater than the pushing force, better meeting the actual needs of the hydraulic support during the moving process, and avoiding equipment damage caused by excessive pushing force of the pushing jack 63.

[0030] Specifically, it also includes a distribution ring 53, which is fixed to the top of the outer surface of the cylinder 41. Its inner side has an upper liquid chamber 531 and a lower liquid chamber 532. The upper liquid chamber 531 communicates with the lower chamber of the cylinder 41, and the lower liquid chamber 532 communicates with the upper chamber of the cylinder 41. A control valve assembly 54 is fixed to the outside of the distribution ring 53. It has a lower chamber inlet hole 541 and an upper chamber inlet hole 542. The lower chamber inlet hole 541 communicates with the upper liquid chamber 531 through a first connecting hole 543, and the upper chamber inlet hole 542 communicates with the lower liquid chamber 532 through a second connecting hole 544. An external hydraulic system interface... The medium enters the lower cavity of cylinder 41 sequentially through the lower cavity inlet hole 541, the first connecting hole 543, and the upper cavity 531. The lifting column 42 rises, and at this time, the medium in the upper cavity of cylinder 41 is discharged synchronously through the lower cavity 532, the second connecting hole 544, and the upper cavity inlet hole 542. The medium of the external hydraulic system enters the upper cavity of cylinder 41 sequentially through the upper cavity inlet hole 542, the second connecting hole 544, and the lower cavity 532. The lifting column 42 descends, and at this time, the medium in the lower cavity of cylinder 41 is discharged synchronously through the upper cavity 531, the first connecting hole 543, and the lower cavity inlet hole 541.

[0031] Specifically, it also includes a through-hole 512, which is vertically installed on the extension plate 51; a mounting cavity 513, which is located on both sides of the through-hole 512, with a hydraulic cavity 514 connected to its outer side. The hydraulic cavity 514 is connected to the upper liquid cavity 531 through an inlet hole 515, and a hydraulic cavity 516 is connected to its inner side. The hydraulic cavity 516 is connected to the lower liquid cavity 532 through an inlet hole 517. Both the inlet hole 515 and the inlet hole 517 are oblique holes for easy drilling; and a mounting base 55, which is sealed and slides on the mounting plate. Inside cavity 513, a sealing slide frame 551 is fixed to the outer end away from the through-hole 512. The sealing slide frame 551 slides within the second hydraulic cavity 514. A toothed plate 511 is mounted on a mounting base 55. The bottom of the toothed surface of the toothed plate 511 is inclined, and the top is flat. When the sealing slide frame 551 contacts the first hydraulic cavity 516, the inner end of the mounting base 55 is flush with the side of the through-hole 512, and the toothed surface of the toothed plate 511 extends into the through-hole 512. By setting mounting base 55, sealing slide frame 551, and sealing slide frame 551 on both sides of the through-hole 512, the sealing slide frame 551 and sealing slide frame 551 can effectively seal the through-hole 512. The toothed plate 511 has a hydraulic chamber 2 514 connected to the upper liquid chamber 531 and a hydraulic chamber 1 516 connected to the lower liquid chamber 532 on both sides of the sealing slide frame 551. When the lifting column 42 needs to be raised, the medium of the hydraulic system enters the lower chamber of the cylinder 41 through the lower chamber inlet 541 and the upper liquid chamber 531, lifting the lifting column 42. At the same time, the medium flowing through the upper liquid chamber 531 enters the hydraulic chamber 2 514 to push against the mounting base 55, so that the toothed surface of the toothed plate 511 extends into the through slide hole 512 and interacts with the teeth on the lifting plate 52. The groove 521 is designed to prevent the top beam 7 from falling suddenly and causing injury to workers when the column structure 4 malfunctions or encounters sudden pressure from the top plate. Similarly, when the lifting plate 52 needs to be lowered, the medium of the hydraulic system enters the upper cavity of the cylinder 41 through the upper cavity inlet hole 542 and the lower cavity 532, causing the lifting column 42 to fall. At the same time, the medium flowing through the lower cavity 532 will enter the first hydraulic cavity 516, pressing the mounting seat 55 towards the second hydraulic cavity 514, so that the toothed plate 511 moves out of the through sliding hole 512, thus preventing the lifting plate 52 from locking when it slides down.

[0032] Specifically, it also includes a compensation slide cavity 552, which is located inside the mounting base 55. The toothed plate 511 slides in the compensation slide cavity 552 through the abutment spring 553. When the abutment spring 553 naturally reaches its limit, the tooth surface of the toothed plate 511 extends into the through slide hole 512. By opening a compensation slide cavity 552 matching the toothed plate 511 inside the mounting base 55, and installing the toothed plate 511 in the compensation slide cavity 552 through the abutment spring 553, when the hydraulic chamber 2 514 is filled with medium, the tooth surface of the toothed plate 511 extends into the through slide hole 512. When the lifting plate 52 rises with the lifting column 42, the toothed plate 511 will be pushed into the compensation slide cavity 552, thereby preventing the toothed plate 511 from blocking the sliding of the lifting plate 52.

[0033] Specifically, it also includes a sealing cover plate 56, which is sealed and fixed to the outside of the extension plate 51. The outer sides of the through hole 512, the mounting cavity 513, the second hydraulic cavity 514 and the first hydraulic cavity 516 are all connected to the sealing cover plate 56. By setting the sealing cover plate 56, it is convenient to open the internal cavity of the extension plate 51 and install the internal components.

[0034] Specifically, the lifting plate 52 slides through the through hole 512, the toothed groove 521 has a bottom slope and a top flat surface, and also includes a safety sliding cavity 524, which is opened at the top of the lifting plate 52, and a linkage spring 525 is fixed at its bottom end; an ear plate 522, whose bottom end slides in the safety sliding cavity 524 and is fixedly connected to the linkage spring 525; a side rod 421, which is fixed to the top of the outside of the lifting column 42 and is set through the ear plate 522; and a limiting plate 523, which is fixed to the bottom of the side of the lifting plate 52 and is used to limit the upward movement of the lifting plate 52. By sliding the ear plate 522 at the top of the lifting plate 52, when encountering sudden pressure from the top plate, the top beam 7 has a certain downward space, which can prevent the device from being damaged by resisting pressure. In addition, the ear plate 522 is connected to the lifting plate 52 through the linkage spring 525, so the lifting column 42 can still drive the lifting plate 52 to rise through the ear plate 522.

[0035] The total weight of this device can be controlled within 4 tons, and the total weight of a single unit can be controlled within 1.9 tons. The dimensions of a single unit in transport mode are 3970mm*462mm*1000mm. It is suitable for the current situation of small and medium-sized coal mines in southern my country. Coal mines do not need to upgrade or modify existing roadways to ensure that the equipment can be transported to the coal face and normal coal mining operations can be achieved. It is an important piece of equipment for integrated mechanized coal mining suitable for specific geological conditions. It is used to maintain the roof of the coal face and isolate the goaf, providing a safe working space for the coal mining machine, scraper conveyor and workers. It can also push the face conveyor to move towards the coal wall. At the same time, it can also use the conveyor as a fulcrum to realize the self-movement of hydraulic supports, thereby realizing integrated mechanized coal mining. It solves the contradiction that roof management lags behind the coal face in mechanized coal mining and further improves and enhances the efficiency of coal mining and transportation equipment.

[0036] Working principle: This device consists of two parts: a left hydraulic support mechanism 1 and a right hydraulic support mechanism 11. It can be disassembled into two parts in the mine for easy transport, and the two parts can be connected as a whole when in use. Together with the pushing mechanism 6, it can achieve functions such as supporting the roof, pushing the conveyor, and pulling the frame.

[0037] When the lifting column 42 needs to be raised to lift the top beam 7, the hydraulic medium enters the lower cavity of the cylinder 41 through the lower inlet hole 541 and the upper liquid cavity 531, lifting the lifting column 42. At the same time, the medium flowing through the upper liquid cavity 531 enters the hydraulic cavity 2 514 to push against the mounting base 55, causing the toothed surface of the toothed plate 511 to extend into the through sliding hole 512 and cooperate with the toothed groove 521 on the lifting plate 52. This prevents the top beam 7 from falling suddenly and causing injury to the workers when the column structure 4 malfunctions or encounters sudden pressure from the top plate. When the lifting plate 52 As the lifting column 42 rises, the toothed plate 511 is pushed into the compensation slide cavity 552, thereby preventing the toothed plate 511 from blocking the sliding of the lifting plate 52. Similarly, when the lifting plate 52 needs to be lowered, the medium of the hydraulic system enters the upper cavity of the cylinder 41 through the upper cavity inlet hole 542 and the lower cavity 532, causing the lifting column 42 to fall. At the same time, the medium flowing through the lower cavity 532 enters the first hydraulic cavity 516, pressing the mounting seat 55 towards the second hydraulic cavity 514, so that the toothed plate 511 moves out of the through slide hole 512, thus preventing the lifting plate 52 from being locked when sliding down.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A split-combined light hydraulic support device, characterized by, The utility model relates to a hydraulic support device, which comprises: a left hydraulic support mechanism (1) and a right hydraulic support mechanism (11) which are symmetrically arranged and have the same structure, and are connected by a connecting assembly (3); two column structures (4) which are respectively arranged on the left hydraulic support mechanism (1) and the right hydraulic support mechanism (11) and are used for separately controlling the left hydraulic support mechanism (1) or the right hydraulic support mechanism (11) to lift and support a roof, and each column structure (4) comprises a cylinder barrel (41) and a lifting column (42); a locking assembly (5) which comprises an extension plate (51) and a lifting plate (52) penetrating through the extension plate (51), the extension plate (51) is fixed on the cylinder barrel (41), the lifting plate (52) is connected with the lifting column (42), a toothed plate (511) is slidably arranged in the extension plate (51), the toothed plate (511) is connected with an external hydraulic system, and a tooth groove (521) is arranged on the side of the lifting plate (52) and is used for temporarily supporting when the hydraulic support device fails; a pushing mechanism (6) which is arranged between the left hydraulic support mechanism (1) and the right hydraulic support mechanism (11) and is connected with the left hydraulic support mechanism (1) and the right hydraulic support mechanism (11) through the connecting assembly (3) and is used for pushing a scraper conveyor and a pull frame.

2. A split combined light hydraulic support device according to claim 1, characterized in that, The utility model further comprises: a base (12) which is hingedly connected with a front connecting rod (13) and a rear connecting rod (14) at the upper portion, the front connecting rod (13) and the rear connecting rod (14) are hingedly connected with a shield beam (15) at the upper portion, and the shield beam (15) is further connected with the bottom end of the cylinder barrel (41); a top beam (7) which is hingedly connected with the shield beam (15) at the rear end and is connected with the top end of the lifting column (42) at the lower portion and is used for supporting the roof; a balance jack (16) which is hingedly connected with the shield beam (15) and the top beam (7) at the two ends.

3. A split combined light hydraulic support device according to claim 2, characterized in that The utility model further comprises: a telescopic beam (71) which is slidably arranged in the top beam (7) and is fixedly connected with the telescopic end of a telescopic jack (711) which is fixed in the top beam (7) at the rear end; a support plate (72) which is hingedly connected with one end of the telescopic beam (71) away from the top beam (7), a bent lug seat (721) is fixedly arranged on the bottom of the telescopic beam (71) away from the support plate (72), a wide rod (722) is hingedly connected with the bottom of the telescopic beam (71) away from the bent lug seat (721), a support jack (723) is hingedly connected between the bent lug seat (721) and the movable end of the wide rod (722), and a narrow rod (724) is hingedly connected between the bottom of the support plate (72) and the movable end of the wide rod (722).

4. The split combined light weight hydraulic support device according to claim 2, wherein, The utility model further comprises: a flexible connecting link (31) which is arranged between the two bases (12) at a position close to the front end; a connecting seat (32) which is hingedly connected with the rear ends of the two bases (12) at the two ends; a connecting shaft (33) which is connected between the two top beams (7).

5. A split combined light hydraulic support device according to claim 4, characterized in that The utility model further comprises: a pushing frame (61) which is hingedly connected with the rear end of the connecting seat (32) at the middle position of the front face, a pushing rod (62) is slidably arranged in the pushing frame (61), and a pushing jack (63) is arranged between the top of the pushing rod (62) close to the connecting seat (32) and the top of the pushing rod (62) away from the connecting seat (32). The connecting head (64) is hinged to the front end of the push rod (62) through a hinge pin (641) for connecting the scraper conveyor.

6. The split combined light weight hydraulic support of claim 1, wherein, Further comprising: The distribution ring (53) is fixed to the top end of the outer surface of the cylinder (41), and the inner side is provided with an upper liquid cavity (531) and a lower liquid cavity (532). The upper liquid cavity (531) is communicated with the lower cavity of the cylinder (41), and the lower liquid cavity (532) is communicated with the upper cavity of the cylinder (41); The control valve group (54) is fixed to the outside of the distribution ring (53), and the upper side is provided with a lower cavity liquid inlet hole (541) and an upper cavity liquid inlet hole (542). The lower cavity liquid inlet hole (541) is communicated with the upper liquid cavity (531) through the communication hole one (543), and the upper cavity liquid inlet hole (542) is communicated with the lower liquid cavity (532) through the communication hole two (544).

7. A split combined light hydraulic support device according to claim 6, characterized in that Further comprising: The through sliding hole (512) is vertically provided on the extension plate (51); The mounting cavity (513) is provided on both sides of the through sliding hole (512), and the outer side is communicated with the hydraulic chamber two (514). The hydraulic chamber two (514) is communicated with the upper liquid cavity (531) through the liquid inlet hole one (515), and the inner side of the hydraulic chamber two (514) is communicated with the hydraulic chamber one (516). The hydraulic chamber one (516) is communicated with the lower liquid cavity (532) through the liquid inlet hole two (517); The mounting seat (55) is sealed and slid in the mounting cavity (513), and the outer side away from one end of the through sliding hole (512) is fixed with a sealing sliding frame (551). The sealing sliding frame (551) is sealed and slid in the hydraulic chamber two (514); The tooth plate (511) is provided on the mounting seat (55), and the tooth surface bottom of the tooth plate (511) is inclined and the top is flat.

8. A split combined light hydraulic support device according to claim 7, characterized in that Further comprising: The compensation sliding cavity (552) is provided on the inner side of the mounting seat (55), and the tooth plate (511) is slid in the compensation sliding cavity (552) through the abutting spring (553).

9. A split combined light hydraulic support device according to claim 7, characterized in that, Further comprising: The sealing cover plate (56) is sealed and fixed to the outside of the extension plate (51), and the outer side of the through sliding hole (512), the mounting cavity (513), the hydraulic chamber two (514) and the hydraulic chamber one (516) are communicated with the sealing cover plate (56).

10. The split combined light weight hydraulic support of claim 7, wherein, The lifting plate (52) is slid through the through sliding hole (512), and the tooth groove (521) is provided with an inclined bottom and a flat top. Further comprising: The safety sliding cavity (524) is provided at the top end of the lifting plate (52), and the bottom end is fixed with a linkage spring (525); The ear plate (522) is slid in the safety sliding cavity (524) and is fixedly connected with the linkage spring (525); The side rod (421) is fixed to the top end of the outer side of the lifting column (42), and is provided through the ear plate (522); The limiting plate (523) is fixed to the bottom end of the side edge of the lifting plate (52) for limiting the upward movement of the lifting plate (52).

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