High-stability mine hydraulic support

Abstract

The present application relates to the technical fields of mine hydraulic support, in particular to a high-stability mine hydraulic support, which comprises a base, a connecting rod installed on one side of the base, a shield beam installed on the end of the connecting rod, a top beam installed on the end of the shield beam, and a hydraulic cylinder installed between the top beam and the base, wherein a sleeve is fixedly installed on the base outside the hydraulic cylinder, a first threaded part is installed between the output end of the hydraulic cylinder and the top beam, and the thread angle of the first threaded part is greater than the equivalent friction angle; the output shaft of the hydraulic cylinder is elongated or shortened to drive the first threaded part and the second threaded part to synchronously ascend and descend, thereby supporting the top beam; when the hydraulic cylinder fails to provide support power, the second threaded part plays a self-locking function through the thread angle being less than the equivalent friction angle, thereby stably supporting the top beam, and external equipment is not needed for support, thereby avoiding the collapse risk caused by the top beam failing to continuously provide support effect.

Description

Technical Field

[0001] This invention relates to the field of mining hydraulic support technology, and specifically to a high-stability mining hydraulic support. Background Technology

[0002] Hydraulic supports are structures used to control mine pressure in coal mining faces. The mine pressure acts on the hydraulic supports as an external load. In the mechanical system of interaction between the hydraulic supports and the surrounding rock of the mining face, if the resultant force of all the supporting components of the hydraulic supports is exactly the same as the resultant force of the external load acting on the hydraulic supports from the roof, then the hydraulic supports are well adapted to the surrounding rock of the mining face.

[0003] In existing hydraulic supports, failures during operation can cause instability, manifesting as tilting, tipping, slippage, and overturning, as well as structural deformation and cracking. Protective measures involve using adjacent support structures for support, then operating anti-tipping jacks to right the supports before proceeding with repairs. However, if the hydraulic cylinders supporting the top beam fail to provide support, the top beam will struggle to continue providing support without external equipment, posing a risk of collapse.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to design a mining hydraulic support that, even when the hydraulic cylinder malfunctions and can no longer provide support during maintenance, can still provide support without the aid of external equipment, thus preventing the risk of collapse. This invention addresses the aforementioned shortcomings in the technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-stability mining hydraulic support, comprising a base, a connecting rod mounted on one side of the base, a top beam mounted on the end of the connecting rod, a shield beam mounted on the end of the top beam, and a hydraulic cylinder mounted between the top beam and the base. The hydraulic cylinder is fitted with a sleeve fixedly mounted on the base. A first threaded component is mounted between the output end of the hydraulic cylinder and the top beam. The thread helix angle on the first threaded component is greater than the equivalent friction angle. An active component is helically mounted on the first threaded component and rotatably mounted to the top of the sleeve. A protective assembly is also mounted on the base. The protective assembly includes a mounting cylinder, a second threaded component penetrating the top of the mounting cylinder, and a driven component helically mounted on the second threaded component. The driven component is rotatably mounted on the mounting cylinder. The thread helix angle of the second threaded component is less than the equivalent friction angle. A transmission component is mounted between the active component and the driven component.

[0007] When the top beam is lifted and lowered by the hydraulic cylinder, the first threaded component drives the driving component to rotate, thereby causing the driven component to rotate and the second threaded component to lift and lower synchronously. However, the second threaded component is constrained by the thread helix angle being less than the equivalent friction angle, and cannot drive the driven component to rotate when it is under pressure, thus achieving self-locking support when the hydraulic cylinder is damaged.

[0008] Preferably, both the first threaded component and the second threaded component are cylindrical in shape, with a first threaded groove and a second threaded groove respectively opened on their outer peripheral surfaces. The thread helix angle of the first threaded groove is greater than the equivalent friction angle, and the thread helix angle of the second threaded groove is less than the equivalent friction angle.

[0009] Preferably, the driving member includes a first hollow column rotatably mounted on the top of the sleeve, and a first external toothed ring fixedly mounted on the top of the first hollow column, the first external toothed ring being threadedly connected to the first threaded groove inside. The driven member includes a second hollow column rotatably mounted on the top of the mounting cylinder, and a second external toothed ring fixedly mounted on the top of the second hollow column, the second external toothed ring being threadedly connected to the second threaded groove inside.

[0010] Preferably, the transmission component includes a connecting frame fixedly installed outside the mounting cylinder, and a first gear rotatably installed on the connecting frame, wherein both the first external gear ring and the second external gear ring mesh with the first gear.

[0011] Preferably, a cylindrical shell is rotatably mounted on the connecting frame, and a striking column is slidably mounted vertically through the top of the cylindrical shell. A guide rail is provided on the outer circumference of the striking column, and a sliding rod is slidably mounted inside the guide rail. A positioning cylinder is fixedly mounted outside the sliding rod. The top of the striking column passes through the positioning cylinder, and a connecting cylinder fixedly connected to the bottom of the top beam is fixedly mounted outside the positioning cylinder. A spring is installed between the bottom of the striking column and the bottom of the inner cavity of the cylindrical shell.

[0012] Preferably, the guide rail includes an upper guide rail and a lower guide rail formed on the outer circumferential surface of the cylindrical housing, and a connecting guide rail between the upper guide rail and the lower guide rail. The vertical width of the upper guide rail is smaller than the vertical width of the lower guide rail, and the vertical width of the lower guide rail is larger than the diameter of the slide rod.

[0013] Preferably, when the top of the striking column contacts the bottom of the top beam, the sliding rod does not contact the bottom of the lower guide rail; when the sliding rod contacts the bottom of the upper guide rail, there is a gap between the top of the striking column and the bottom of the top beam.

[0014] Preferably, a third external gear ring is fixedly installed on the outside of the cylindrical shell, and the transmission component also includes a second gear rotatably installed on the connecting frame, wherein both the second and third external gear rings mesh with the second gear.

[0015] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0016] This invention uses the extension or retraction of the hydraulic cylinder output shaft to drive the first and second threaded components to rise and fall synchronously, thereby supporting the top beam. When the hydraulic cylinder malfunctions and cannot provide supporting power, the second threaded component has a self-locking function by having a thread helix angle smaller than the equivalent friction angle, thus providing stable support for the top beam without the need for external equipment, avoiding the risk of collapse caused by the top beam's inability to continue providing support.

[0017] During the lifting and lowering of the top beam, the rotating cylindrical shell causes the striking column to intermittently collide with the bottom of the top beam, generating vibrations that shake off the soil and other debris adhering to the top beam. This reduces the friction between the hydraulic support and the tunnel roof during movement, thus achieving a cleaning effect.

[0018] Meanwhile, when the top beam of the present invention rises and falls, the striking column and the positioning cylinder will descend synchronously with the top beam, ensuring that as long as the cylindrical shell is rotating, it will drive the striking column to rise and fall intermittently, thereby colliding with the bottom of the top beam. This will prevent the striking column from failing to work when the top beam rises or falls to a certain height. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a perspective view of the present invention;

[0022] Figure 3 This is a schematic diagram showing the connection between the transmission component, the driving component, and the driven component of the present invention;

[0023] Figure 4 This is a schematic diagram showing the connection between the striking post and the cylindrical outer shell of the present invention;

[0024] Figure 5 This is a simplified schematic diagram of the connection between the slide rod and the guide rail according to the present invention;

[0025] Figure 6 This is a simplified schematic diagram of the installation of the hydraulic cylinder and sleeve according to the present invention;

[0026] Figure 7 This is a simplified schematic diagram of the connection of the second threaded component inside the mounting cylinder of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Base; 2. Connecting rod; 3. Protective beam; 4. Top beam; 5. Hydraulic cylinder; 6. Sleeve; 7. First threaded component; 8. Driving component; 8a. First hollow column; 8b. First external gear ring; 9. Protective component; 9a. Mounting cylinder; 9b. Second threaded component; 9c. Driven component; 9c1. Second hollow column; 9c2. Second external gear ring; 10. Transmission component; 10a. Connecting frame; 10b. First gear; 10c. Second gear; 11. Cylindrical housing; 12. Striking column; 13. Guide rail; 13a. Upper guide rail; 13b. Lower guide rail; 13c. Connecting guide rail; 14. Slide rod; 15. Positioning cylinder; 16. Connecting cylinder; 17. Spring; 18. Third external gear ring. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] This invention provides, for example Figure 1-7A high-stability mining hydraulic support, as shown, includes a base 1, a connecting rod 2 mounted on one side of the base 1, a top beam 4 mounted on the end of the connecting rod 2, a shield beam 3 mounted on the end of the top beam 4, and a hydraulic cylinder 5 installed between the top beam 4 and the base 1. A sleeve 6, fixedly mounted on the base 1, is fitted over the hydraulic cylinder 5. A first threaded component 7, which is entirely cylindrical, passes through the top of the sleeve 6. One end of the first threaded component 7 is fixedly connected to the output shaft end of the hydraulic cylinder 5, and the other end is fixedly connected to the bottom of the top beam 4. The first threaded component 7 has a first threaded groove, the thread helix angle of which is greater than the equivalent friction angle. A first hollow column 8a is rotatably mounted on the top of the sleeve 6. A first external gear ring 8b is fixedly installed on the base 1, forming the driving component 8. The first external gear ring 8b is threadedly connected to the first threaded groove. Because the helix angle of the first threaded groove is greater than the equivalent friction angle, the first threaded component 7 can drive the first external gear ring 8b to rotate through the first threaded groove when moving along the central axis of the first external gear ring 8b. A protective component 9 is also installed on the base 1. The protective component 9 includes a mounting cylinder 9a, a second threaded component 9b penetrating the top of the mounting cylinder 9a, and a driven component 9c threadedly connected to the second threaded component 9b. The second threaded component 9b is cylindrical in shape, and the driven component 9c is a second hollow column 9c1 rotatably mounted on the mounting cylinder 9a. The device consists of a second external gear ring 9c2 fixedly mounted on the top of the second hollow column 9c1. A second threaded part 9b has a second threaded groove. The thread helix angle of the second threaded groove is less than the equivalent friction angle. Therefore, the movement of the second threaded part 9b along the central axis of the second external gear ring 9c2 is restricted. Only when the second external gear ring 9c2 rotates can the second threaded part 9b be driven to rise. A transmission component 10 is installed between the driving component 8 and the driven component 9c. The transmission component 10 includes a connecting frame 10a fixedly mounted outside the mounting cylinder 9a, and a first gear 10b and a second gear 10c rotatably mounted on the connecting frame 10a. Both the first external gear ring 8b and the second external gear ring 9c2 are connected to... When the first gear 10b is engaged, the first external gear ring 8b rotates when the hydraulic cylinder 5 drives the first threaded component 7 to rise and fall. The first external gear ring 8b then drives the second external gear ring 9c2 to rotate via the first gear 10b, thereby synchronously driving the second threaded component 9b to rise and fall. This ensures that the end of the second threaded component 9b is in contact with the bottom of the top beam 4. However, if the hydraulic cylinder 5 malfunctions and cannot provide support power, the weight of the top beam 4 presses on the second threaded component 9b. Since the thread helix angle of the second thread groove is less than the equivalent friction angle, the second threaded component 9b cannot descend along the central axis of the second external gear ring 9c2, thus achieving a self-locking function and ensuring that the hydraulic support can still play a supporting role.

[0032] Meanwhile, a cylindrical shell 11 is rotatably mounted on the connecting frame 10a. A striking post 12 is vertically slidably mounted through the top of the cylindrical shell 11. The outer circumference of the striking post 12 has a guide rail 13, which consists of an upper guide rail 13a, a lower guide rail 13b, and a connecting guide rail 13c between the upper guide rail 13a and the lower guide rail 13b. The vertical width of the lower guide rail 13b is greater than the vertical width of the upper guide rail 13a. A sliding rod 14 with a diameter smaller than the vertical width of the upper guide rail 13a is slidably mounted inside the guide rail 13. A positioning cylinder 15, which is sleeved on the outside of the striking post 12, is fixedly mounted at the end of the sliding rod 14. A connecting cylinder 16 is fixedly mounted outside the positioning cylinder 15. The top of the connecting cylinder 16 is connected to the bottom of the top beam 4. A spring 17 is installed between the bottom end of the striking column 12 and the bottom of the inner cavity of the cylindrical housing 11, which applies a vertically upward force to the striking column 12. When the sliding rod 14 is located inside the lower guide rail 13b, the top end of the striking column 12 contacts the bottom of the top beam 4, but the sliding rod 14 does not contact the top of the lower guide rail 13b. This requires that the width of the lower guide rail 13b is greater than the diameter of the sliding rod 14. At the same time, the cross-section of the part of the striking column 12 that slides vertically inside the guide rail 13b is non-circular. In order to allow the striking column 12 to rise and fall intermittently when the top beam 4 is raised and lowered, a third external toothed ring 18 is also fixedly installed outside the cylindrical housing 11. The transmission component 10 also includes a second toothed ring rotatably installed on the connecting frame 10a. Wheel 10c, second external gear ring 9c2, and third external gear ring 18 all mesh with the second gear 10c. When the second external gear ring 9c2 rotates, it drives the third external gear ring 18 to rotate via the second gear 10c. The third external gear ring 18 drives the cylindrical outer shell 11 to rotate, which in turn drives the internal striking post 12 to rotate. The striking post 12 drives the guide rail 13 to rotate. Since the slide rod 14 is fixedly mounted on the positioning cylinder 15, and the positioning cylinder 15 is fixed to the top beam 4 via the connecting cylinder 16, the slide rod 14 is essentially sliding relative to the guide rail 13. When the slide rod 14 slides from the upper guide rail 13a to the lower guide rail 13b via the connecting guide rail 13c, the spring 17 pushes the striking post 18. 2. When the top beam 4 rises to collide with the bottom of the top beam 4, and the slide rod 14 slides from the lower guide rail 13b through the connecting guide rail 13c to the upper guide rail 13a, the striking column 12 will descend and compress the spring 17. Whenever the top beam 4 descends, it will drive the striking column 12 and the positioning cylinder 15 to descend synchronously to a certain height, causing the striking column 12 to move into the cylindrical shell 11, thereby compressing the spring 17 more. This ensures that the top beam 4 of this product will not affect the striking column 12 from colliding with the bottom of the top beam 4 during the lifting and lowering process, thereby shaking off the soil and other materials attached to the top beam 4, reducing the friction between the hydraulic support and the tunnel top during the movement, and thus playing a cleaning role.

[0033] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. A high-stability mining hydraulic support, comprising a base (1), a connecting rod (2) mounted on one side of the base (1), a top beam (4) mounted on the end of the connecting rod (2), a shield beam (3) mounted on the end of the top beam (4), and a hydraulic cylinder (5) mounted between the top beam (4) and the base (1), characterized in that: The hydraulic cylinder (5) is fitted with a sleeve (6) fixedly mounted on the base (1). A first threaded component (7) is installed between the output end of the hydraulic cylinder (5) and the top beam (4). The thread helix angle on the first threaded component (7) is greater than the equivalent friction angle. An active component (8) that is rotatably mounted on the first threaded component (7) and rotates with the top of the sleeve (6) is screwed onto the first threaded component (7). A protective component (9) is also installed on the base (1). The protective component (9) includes a mounting cylinder (9a) and a second threaded component that penetrates the top of the mounting cylinder (9a). 9b), and a driven member (9c) screwed onto the second threaded member (9b), the driven member (9c) being rotatably mounted on the mounting cylinder (9a), the thread helix angle of the second threaded member (9b) being less than the equivalent friction angle, a transmission member (10) being mounted between the driving member (8) and the driven member (9c), the transmission member (10) including a connecting frame (10a) fixedly mounted on the outside of the mounting cylinder (9a), a cylindrical housing (11) being rotatably mounted on the connecting frame (10a), the cylindrical housing (11) A striking column (12) is vertically slidably installed through the top. The cylindrical shell (11) drives the internal striking column (12) to rotate. A guide rail (13) is provided on the outer circumference of the striking column (12). A sliding rod (14) is slidably installed inside the guide rail (13). A positioning cylinder (15) is fixedly installed outside the sliding rod (14). The top of the striking column (12) passes through the positioning cylinder (15). A connecting cylinder (16) fixedly connected to the bottom of the top beam (4) is fixedly installed outside the positioning cylinder (15). The striking column ( 12) A spring (17) is installed between the bottom end and the bottom of the inner cavity of the cylindrical shell (11). The guide rail (13) includes an upper guide rail (13a) and a lower guide rail (13b) opened on the outer circumference of the cylindrical shell (11), and a connecting guide rail (13c) between the upper guide rail (13a) and the lower guide rail (13b). The vertical width of the upper guide rail (13a) is smaller than the vertical width of the lower guide rail (13b), and the vertical width of the lower guide rail (13b) is larger than the diameter of the slide rod (14). When the top beam (4) is driven to rise and fall by the hydraulic cylinder (5), the first threaded part (7) drives the active part (8) to rotate, thereby driving the driven part (9c) to rotate so that the second threaded part (9b) rises and falls synchronously. However, the second threaded part (9b) is restricted by the thread helix angle being less than the equivalent friction angle, and cannot drive the driven part (9c) to rotate when it is compressed, thus achieving self-locking support when the hydraulic cylinder (5) is damaged.

2. The high-stability mining hydraulic support according to claim 1, characterized in that: Both the first threaded component (7) and the second threaded component (9b) are cylindrical in shape, with a first threaded groove and a second threaded groove respectively on their outer circumferential surfaces. The thread helix angle of the first threaded groove is greater than the equivalent friction angle, and the thread helix angle of the second threaded groove is less than the equivalent friction angle.

3. A high-stability mining hydraulic support according to claim 2, characterized in that: The driving member (8) includes a first hollow column (8a) rotatably mounted on the top of the sleeve (6), and a first external toothed ring (8b) fixedly mounted on the top of the first hollow column (8a). The interior of the first external toothed ring (8b) is threadedly connected to the first threaded groove. The driven member (9c) includes a second hollow column (9c1) rotatably mounted on the top of the mounting cylinder (9a), and a second external toothed ring (9c2) fixedly mounted on the top of the second hollow column (9c1). The interior of the second external toothed ring (9c2) is threadedly connected to the second threaded groove.

4. A high-stability mining hydraulic support according to claim 3, characterized in that: The transmission component (10) further includes a first gear (10b) rotatably mounted on a connecting frame (10a), wherein the first external gear ring (8b) and the second external gear ring (9c2) both mesh with the first gear (10b).

5. A high-stability mining hydraulic support according to claim 1, characterized in that: When the top of the striking column (12) contacts the bottom of the top beam (4), the sliding rod (14) does not contact the bottom of the lower guide rail (13b). When the sliding rod (14) contacts the bottom of the upper guide rail (13a), there is a gap between the top of the striking column (12) and the bottom of the top beam (4).

6. A high-stability mining hydraulic support according to claim 4, characterized in that: A third external gear ring (18) is fixedly installed on the outside of the cylindrical shell (11). The transmission component (10) also includes a second gear (10c) rotatably installed on the connecting frame (10a). Both the second external gear ring (9c2) and the third external gear ring (18) mesh with the second gear (10c).

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