Anti-tilting locking device for top beam of hydraulic support

Abstract

The invention discloses a hydraulic support top beam anti-tilting locking device which comprises a base and a cylinder body fixedly installed on the upper surface of the base, a top beam is fixedly installed on the upper surface of the cylinder body, a locking mechanism is fixedly installed on the lower surface of the top beam, protective shells are arranged on the two sides of the locking mechanism, connecting mechanisms are arranged in the protective shells, and the connecting mechanisms are fixedly installed on the upper surface of the cylinder body. The connecting mechanism comprises a connecting ball, an exhaust pipe is fixedly mounted on the outer side of the connecting ball, and a vacuum cavity is formed in the connecting ball; according to the hydraulic support disclosed by the invention, the locking mechanism is arranged and can form a locking state with the top plate through being in contact with the top plate and depending on the self weight of the hydraulic support, meanwhile, the purpose of providing stable support for other hydraulic supports can be achieved, the domino effect is prevented, and when the inclination of the hydraulic support is not easy to observe through naked eyes, the hydraulic support can be locked. And triggering of the locking device can prompt workers that the hydraulic support inclines, and therefore the effects of anti-falling locking stability and inclination early warning are achieved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support technology, and in particular to a hydraulic support top beam anti-tipping locking device. Background Technology

[0002] The hydraulic support top beam anti-tipping locking device is specifically designed to solve the problem of top beam tilting and displacement under complex coal mining conditions, ensuring that the top beam always maintains a horizontal and stable support posture, and avoiding roof collapse accidents caused by top beam instability.

[0003] Therefore, the stability of the top beam directly determines the safety of underground operations and mining efficiency. However, the existing hydraulic support top beam anti-tipping locking device only connects the hydraulic supports through hydraulic cylinders or iron chains. When one of the hydraulic supports tilts or shifts, it is stabilized by the hydraulic supports connected on both sides, thereby preventing the hydraulic support from tilting or shifting.

[0004] However, the environment of coal mining faces is complex, and the above-mentioned hydraulic cylinder anti-tipping locking method is prone to domino effect, which can lead to accidents and escalate them. The iron chain connection method may break when subjected to large forces, which will cause the anti-tipping locking device to fail and increase the difficulty of straightening the hydraulic support.

[0005] Meanwhile, when the hydraulic support tilts slightly, it is difficult to detect during worker inspections, which leads to a larger tilt angle and further increases the difficulty of correction.

[0006] Therefore, we provide a hydraulic support top beam anti-tipping locking device. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned technical problems by providing a hydraulic support top beam anti-tipping locking device, which achieves the effects of anti-tipping locking stability and tilt warning.

[0008] In view of this, the present invention provides a hydraulic support top beam anti-tipping locking device, including a base and a cylinder fixedly installed on the upper surface of the base. A top beam is fixedly installed on the upper surface of the cylinder, and a locking mechanism is fixedly installed on the lower surface of the top beam. Protective shells are provided on both sides of the locking mechanism, and a connecting mechanism is provided inside the protective shells. The connecting mechanism includes a connecting ball, an air extraction pipe is fixedly installed on the outside of the connecting ball, and a vacuum chamber is provided inside the connecting ball; A steel wire rope is fixedly installed on the outside of the connecting ball, and the outside of the steel wire rope is slidably connected to the inside of the protective shell; The locking mechanism includes a combination post and a protective plug. One end of the combination post is fixedly connected to the outside of the connecting ball. A lifting cylinder is fixedly installed on the outer side of the combination post near the end of the connecting ball. A slider is slidably connected inside the lifting cylinder. A locking post is fixedly installed on the upper surface of the slider.

[0009] Preferably, the connecting ball is composed of two hemispherical shells that fit together. One hemispherical shell has a sealing groove on one side, and the other hemispherical shell has a sealing protrusion fixedly installed on the side near the sealing groove. The sealing protrusion is inserted into the sealing groove, and the air extraction pipe communicates with the interior of the connecting ball.

[0010] Preferably, there are two combined columns, and a fixing body is fixedly installed on one end of each of the two combined columns, with the upper end of the fixing body fixedly connected to the lower surface of the top beam.

[0011] Preferably, the combined column has a communicating cavity inside near the end of the lifting cylinder, and the communicating cavity communicates with the inside of the lifting cylinder.

[0012] Preferably, a spring is fixedly installed on the inner wall of the lifting cylinder, and the other end of the spring is fixedly connected to the lower surface of the slider. Several limiting grooves are opened on the outer side of the locking column.

[0013] Preferably, the inner wall of the upper end of the lifting cylinder is provided with a rotating groove, and the rotating groove is fixedly installed on both sides of the inner wall.

[0014] Preferably, a limiting plate and a push plate are rotatably connected to the outer side of the rotating shaft, and a torsion spring is sleeved on the outer side of the rotating shaft. One end of the torsion spring is fixedly connected to the inner wall of the rotating groove, and the other end of the torsion spring is fixedly connected to the limiting plate.

[0015] Preferably, a rotating rod is rotatably connected inside the limiting plate, and one end of the rotating rod is fixedly connected to one side of the push plate.

[0016] Preferably, a rotating ring is rotatably mounted on the outer side of the upper end of the lifting cylinder, and the end of the rotating rod away from the push plate extends into the interior of the rotating ring, with a turntable fixedly mounted on one end of the rotating rod.

[0017] Preferably, a plurality of rotating rods are fixedly installed on the circumference of the turntable, a drive groove is provided on the inner wall of the rotating ring, the inner wall of the drive groove is engaged with the rotating rods, and a plurality of travel grooves are provided through the inner wall of the rotating ring.

[0018] Compared with the prior art, the present invention provides a hydraulic support top beam anti-tipping locking device, which has the following beneficial effects: This invention, by setting a locking mechanism, can lock the hydraulic support to the top plate by contacting it and relying on its own weight. At the same time, it can provide stable support for other hydraulic supports, preventing a domino effect. Furthermore, when the tilt of the hydraulic support is not easily observed by the naked eye, the triggering of the locking device can alert the worker that the hydraulic support is tilting, thereby achieving the effects of anti-tipping locking stability and tilt warning.

[0019] This invention, by setting a connecting mechanism, can disconnect the hydraulic supports on both sides of a tilted hydraulic support when one of the hydraulic supports tilts, and at the same time trigger a locking mechanism to lock and prevent tilting, thereby achieving the effects of anti-tipping locking stability and tilt warning.

[0020] This invention, by setting the connecting ball to be composed of two hemispherical shells, can form a complete connecting ball with the hemispherical shell on another hydraulic support. Thus, when one of the hydraulic supports tilts, the two can quickly disconnect, preventing the other hydraulic support from being pulled, and can trigger the locking mechanism, thereby achieving the effects of anti-tipping locking stability and tilt warning.

[0021] This invention, by setting several limiting grooves, can adapt to top plates in different environments, ensuring the stability of the locking column, thereby achieving the effect of preventing tipping and ensuring stable locking.

[0022] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention has a simple structure and is easy to operate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 2 This is a schematic cross-sectional view of the protective housing structure of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 3 This is a schematic diagram of the connecting ball structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 4 This is a schematic diagram of the air extraction pipe structure of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 5 This is a schematic diagram of the locking mechanism of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting ball of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 7 This is a schematic diagram of the connecting ball unfolding structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 8 This is a schematic diagram of the combined column structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 9 This is a schematic diagram of the protective plug structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 10 This is an enlarged schematic diagram of section A of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 11 This is a schematic diagram of the lifting cylinder structure of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 12 This is an enlarged schematic diagram of section B of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 13 This is a schematic diagram of the limiting plate structure of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention; Figure 14 This is a schematic diagram of the locking column structure of a hydraulic support top beam anti-tipping locking device proposed in this invention; Figure 15 This is a schematic cross-sectional view of the lifting cylinder structure of the anti-tipping locking device for the top beam of a hydraulic support proposed in this invention.

[0024] In the diagram: 1. Base; 2. Cylinder; 3. Top beam; 4. Protective shell; 5. Locking mechanism; 51. Fixing body; 52. Combined column; 53. Lifting cylinder; 54. Protective plug; 55. Connecting cavity; 56. Locking column; 57. Limiting groove; 58. Spring; 59. Slider; 510. Rotating ring; 511. Rotating groove; 512. Limiting plate; 513. Push plate; 514. Rotating rod; 515. Turntable; 516. Rotating rod; 517. Drive groove; 518. Rotating shaft; 519. Traveling groove; 520. Torsion spring; 6. Wire rope; 7. Connecting mechanism; 71. Evacuation pipe; 72. Connecting ball; 74. Sealing groove; 75. Sealing protrusion; 76. Vacuum chamber. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Example: A hydraulic support top beam anti-tipping locking device, such as... Figures 1-15 As shown, it includes a base 1 and a cylinder 2 fixedly installed on the upper surface of the base 1. A top beam 3 is fixedly installed on the upper surface of the cylinder 2, and a locking mechanism 5 is fixedly installed on the lower surface of the top beam 3. Protective shells 4 are provided on both sides of the locking mechanism 5. The protective shells 4 are composed of two parts that fit together and are in a snap-fit ​​state. When the pulling force is greater than the snap-fit ​​force, the protective shells 4 can be opened. When hit by falling stones or coal pieces, they cannot be opened because they are perpendicular to the snap-fit ​​force and can achieve the protective effect. The protective shells 4 are made of mining wear-resistant steel. The protective shells 4 can protect the connecting ball 72 and prevent the complex underground environment from causing the sealing of the connecting ball 72 to fail. The protective outer shell 4 has a connecting mechanism 7 inside. The connecting mechanism 7 includes a connecting ball 72, which is made of mining wear-resistant steel. The connecting ball 72 is composed of two hemispherical shells that fit together. Each hydraulic support is equipped with two hemispherical shells with opposite openings. The connecting ball 72 needs to fit with the hemispherical shells on the hydraulic supports on both sides to form a complete connecting ball 72. One of the hemispherical shells has a sealing groove 74 on one side. The sealing groove 74 is a trapezoidal groove. The surface of the sealing groove 74 is covered with flame-retardant nitrile rubber. The other hemispherical shell is fixedly installed with a sealing protrusion 75 on the side near the sealing groove 74. The surface of the sealing protrusion 75 is covered with flame-retardant nitrile rubber. The sealing protrusion 75 and the sealing groove 74 are inserted into each other and are compatible with each other. An air extraction pipe 71 is fixedly installed on the outside of the connecting ball 72. The air extraction pipe 71 extends to the outside of the protective shell 4 and is connected to the inside of the connecting ball 72. A coal mine explosion-proof vacuum diaphragm valve is installed at the connection between the air extraction pipe 71 and the connecting ball 72. The coal mine explosion-proof vacuum diaphragm valve is existing technology and will not be described in detail here, nor is it shown in the figure. The connecting ball 72 has a vacuum chamber 76 inside. A steel wire rope 6 is fixedly installed on the outside of the connecting ball 72. The tensile force of the steel wire rope 6 is always greater than the suction force of the connecting ball 72 after vacuuming, so as to prevent the steel wire rope 6 from breaking prematurely when the hydraulic support tilts, which would prevent the connecting ball 72 from failing to operate normally. The outside of the steel wire rope 6 is slidably connected to the inside of the protective shell 4. The locking mechanism 5 includes a combination column 52 and a protective plug 54. The protective plug 54 is inserted into the lifting cylinder 53. The protective plug 54 is only used to prevent falling rocks and other debris from blocking the lifting cylinder 53. The protective plug 54 has no effect on the locking column 56. When the locking column 56 moves, it can push out the protective plug 54. The combined column 52 has a connecting cavity 55 inside near the end of the lifting cylinder 53. The connecting cavity 55 is connected to the inside of the lifting cylinder 53 and the inside of the connecting ball 72. Thus, when vacuuming, the slider 59 inside the lifting cylinder 53 can be pushed by atmospheric pressure to compress the spring 58. There are two combined columns 52. The two combined columns 52 are fixedly installed with a fixing body 51 at one end. The upper end of the fixing body 51 is fixedly connected to the lower surface of the top beam 3. One end of the combined column 52 is fixedly connected to the outside of the connecting ball 72. The lifting cylinder 53 is fixedly installed on the outside of the end of the combined column 52 near the end of the connecting ball 72. A rotating ring 510 is rotatably installed on the outside of the upper end of the lifting cylinder 53. The inner wall of the rotating ring 510 has a drive groove 517. The inner wall of the drive groove 517 is engaged with the rotating rod 516. Several walking grooves 519 are opened through the inner wall of the rotating ring 510. A rotating groove 511 is provided on the inner wall of the upper end of the lifting cylinder 53. A rotating shaft 518 is fixedly installed on both sides of the rotating groove 511. A limit plate 512 and a push plate 513 are rotatably connected to the outer side of the rotating shaft 518. The initial position of the limit plate 512 is shown in the attached drawing of the instruction manual. A rotating rod 514 is rotatably connected inside the limit plate 512. A turntable 515 is fixedly installed at one end of the rotating rod 514. Several rotating rods 516 are fixedly installed around the turntable 515. The end of the rotating rod 514 away from the push plate 513 extends to the rotating shaft 516. Inside the rotating ring 510, one end of the rotating rod 514 is fixedly connected to one side of the push plate 513. A torsion spring 520 is sleeved on the outside of the rotating shaft 518. The torsion spring 520 can restore the limiting plate 512 to its initial position. One end of the torsion spring 520 is fixedly connected to the inner wall of the rotating groove 511, and the other end of the torsion spring 520 is fixedly connected to the limiting plate 512. A spring 58 is fixedly installed on the inner wall of the lifting cylinder 53. The other end of the spring 58 is fixedly connected to the lower surface of the slider 59. The slider 59 is slidably connected inside the lifting cylinder 53. Two bidirectional lip seals are installed around the slider 59. When vacuuming, the negative pressure inside the lifting cylinder 53 will press the lips of the bidirectional lip seals tightly against the inner wall of the lifting cylinder 53. The higher the vacuum intensity, the stronger the lip contact force of the bidirectional lip seals, thus forming a self-tightening seal. The bidirectional lip seals are existing technology and will not be described in detail here, nor are they shown in the figure. At the same time, when the slider 59 moves, the lips of the bidirectional lip seals can adaptively adjust to follow the movement of the slider 59 to avoid leakage. A locking post 56 is fixedly installed on the upper surface of the slider 59. Several limiting grooves 57 are opened on the outer side of the locking post 56. Due to the complex downhole environment, the distance between the locking post 56 and the top plate is different. Therefore, several limiting grooves 57 can ensure the stability of the locking post 56. The limiting grooves 57 are engaged with the limiting plate 512.

[0028] Working principle: When the top beam 3 tilts, it first leans to one side, and the connecting ball 72, located in the opposite direction of the tilt, is subjected to tension. When the tension exceeds the attraction force of the connecting ball 72, it is pulled into two parts, and the vacuum state is broken. At this time, the vacuum inside the connecting cavity 55 and the lifting cylinder 53 is lost. The spring 58 then unfolds, pushing the slider 59 upward. Simultaneously, the locking pin 56 moves upward, and the protective plug 54 is pushed out by the locking pin 56. At the same time, the surface of the locking pin 56 presses against the limiting plate 512, which is then pressed into the rotating groove 511. When the locking pin 56 contacts the top plate, it stops moving, and the limiting plate 512 returns to its original position. In the initial state, the limiting plate 512 is engaged with the limiting groove 57, thus preventing the locking pin 56 from retracting due to pressure from the top plate. If the top beam 3 continues to tilt and the tilt worsens, the locking pin 56 will make a tighter and more secure contact with the top plate, thus forming a self-locking state between the locking pin 56 and the top plate, stopping the top beam 3 from tilting. At the same time, the steel wire rope 6 in the tilting direction is subjected to a downward pulling force. When the pulling force is greater than the attraction force of the connecting ball 72, the locking pin 56 on this side extends and contacts the other hydraulic support. Since the locking pins 56 on both sides of the tilted hydraulic support extend, one of the locking pins 56 on the hydraulic supports on both sides of the tilted hydraulic support will also extend, thus preventing the tilted hydraulic support from tilting further. The pressure bracket causes the normal hydraulic support to tilt, resulting in a domino effect. When the inspection worker notices the extension of the locking pin 56, they can determine that the hydraulic support is tilted. After the hydraulic support returns to its normal state, the locking pin 56 is slightly pulled upwards. Since the upper end of the inner part of the limiting groove 57 is in contact with the limiting plate 512, pulling the locking pin 56 can disengage the limiting groove 57 from the limiting plate 512. At this time, the rotating ring 510 is rotated, and the driving groove 517 inside the rotating ring 510 engages with and pushes the rotating rod 516. The rotating rod 516 drives the turntable 515 and the rotating rod 514, while the push plate 513 rotates and contacts the limiting plate 512. At this time, the limiting plate 512 rotates and the torsion spring 520 rotates. When the limiting plate 512 enters the rotating groove 511, the connecting ball 72 is then put into contact. At this time, the mine vacuum pump is connected to the air extraction pipe 71, and then the mine vacuum pump is started. When the inside of the connecting ball 72 is gradually evacuated, it is squeezed by atmospheric pressure. The slider 59 moves into the connecting cavity 55, the spring 58 retracts, and the locking column 56 moves downward. When the vacuuming work is completed, the rotating ring 510 is turned in the opposite direction so that the push plate 513 contacts and restricts the limiting plate 512. At this time, under the rotation of the torsion spring 520, the limiting plate 512 returns to the initial position. Then the protective plug 54 is inserted into the lifting cylinder 53, thereby completing the correction of the hydraulic support.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydraulic support top beam anti-tipping locking device, comprising a base (1) and a cylinder (2) fixedly installed on the upper surface of the base (1), characterized in that, A top beam (3) is fixedly installed on the upper surface of the cylinder (2), and a locking mechanism (5) is fixedly installed on the lower surface of the top beam (3). A protective shell (4) is provided on both sides of the locking mechanism (5), and a connecting mechanism (7) is provided inside the protective shell (4). The connecting mechanism (7) includes a connecting ball (72), an air extraction pipe (71) is fixedly installed on the outside of the connecting ball (72), and a vacuum chamber (76) is provided inside the connecting ball (72). A steel wire rope (6) is fixedly installed on the outside of the connecting ball (72), and the outside of the steel wire rope (6) is slidably connected to the inside of the protective shell (4); The locking mechanism (5) includes a combination column (52) and a protective plug (54). One end of the combination column (52) is fixedly connected to the outside of the connecting ball (72). A lifting cylinder (53) is fixedly installed on the outside of the end of the combination column (52) near the connecting ball (72). A slider (59) is slidably connected inside the lifting cylinder (53). A locking column (56) is fixedly installed on the upper surface of the slider (59).

2. The anti-tipping locking device for the top beam of a hydraulic support according to claim 1, characterized in that, The connecting ball (72) is composed of two hemispherical shells that fit together. One of the hemispherical shells has a sealing groove (74) on one side, and the other hemispherical shell has a sealing protrusion (75) fixedly installed on the side near the sealing groove (74). The sealing protrusion (75) and the sealing groove (74) are inserted into each other. The air extraction pipe (71) is connected to the inside of the connecting ball (72).

3. The anti-tipping locking device for the top beam of a hydraulic support according to claim 1, characterized in that, There are two combined columns (52), and a fixing body (51) is fixedly installed on one end of each of the two combined columns (52). The upper end of the fixing body (51) is fixedly connected to the lower surface of the top beam (3).

4. The anti-tipping locking device for the top beam of a hydraulic support according to claim 3, characterized in that, The combined column (52) has a connecting cavity (55) inside near the end of the lifting cylinder (53), and the connecting cavity (55) is connected to the inside of the lifting cylinder (53).

5. The anti-tipping locking device for the top beam of a hydraulic support according to claim 4, characterized in that, A spring (58) is fixedly installed on the inner wall of the lifting cylinder (53). The other end of the spring (58) is fixedly connected to the lower surface of the slider (59). Several limiting grooves (57) are opened on the outer side of the locking column (56).

6. The anti-tipping locking device for the top beam of a hydraulic support according to claim 5, characterized in that, The upper end of the lifting cylinder (53) has a rotating groove (511) on its inner wall, and the rotating groove (511) is fixedly installed with a rotating shaft (518) on both sides of the inner wall.

7. The anti-tipping locking device for the top beam of a hydraulic support according to claim 6, characterized in that, The rotating shaft (518) is rotatably connected to a limiting plate (512) and a push plate (513). A torsion spring (520) is sleeved on the outside of the rotating shaft (518). One end of the torsion spring (520) is fixedly connected to the inner wall of the rotating groove (511), and the other end of the torsion spring (520) is fixedly connected to the limiting plate (512).

8. The anti-tipping locking device for the top beam of a hydraulic support according to claim 7, characterized in that, The limiting plate (512) is rotatably connected to a rotating rod (514), one end of which is fixedly connected to one side of the push plate (513).

9. The anti-tipping locking device for the top beam of a hydraulic support according to claim 8, characterized in that, A rotating ring (510) is rotatably mounted on the outer side of the upper end of the lifting cylinder (53). The rotating rod (514) extends into the rotating ring (510) at one end away from the push plate (513). A turntable (515) is fixedly mounted on one end of the rotating rod (514).

10. A hydraulic support top beam anti-tipping locking device according to claim 9, characterized in that, A number of rotating rods (516) are fixedly installed on the circumference of the turntable (515). A drive groove (517) is opened on the inner wall of the rotating ring (510). The inner wall of the drive groove (517) is engaged with the rotating rod (516). A number of walking grooves (519) are opened through the inner wall of the rotating ring (510).

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