Mining safety anti-impact stand column with built-in air pressure anti-impact valve

Abstract

The mining safety anti-impact stand column comprises a hollow column body with an opening in the left side, a movable shell is arranged on the outer side of the hollow column body in a sleeved mode, a connector is fixedly connected to the left side of the movable shell, a guide sleeve is fixedly arranged in the movable shell in a sleeved mode, and the outer side of the hollow column body is sleeved with the guide sleeve in a sliding mode. And four vent holes are annularly formed in the right side of the guide sleeve at equal intervals. According to the utility model, a series of structures are arranged, so that automatic damping force unloading anti-impact can be carried out by utilizing a mode of exhausting, pressure building and yielding through a small hole when the anti-impact device is impacted, full-mechanical self-rebound resetting and gas supplementation for later use are facilitated after the anti-impact device is used, and the resetting work does not need to be carried out by additionally and independently filling gas or cooperating with internal circulating liquid; full-mechanical automatic use is achieved, the damping anti-impact force can be flexibly adjusted according to use requirements, enhancement adjustment work can be carried out when the elastic fatigue elastic force of the buffer spring becomes weak, the use flexibility is improved, and the service life of the buffer spring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine hydraulic support columns, in particular to a mine safety anti-shock column with a built-in air pressure anti-shock valve. Background Art

[0002] With the deepening of coal mining, more and more coal mines are mined at a depth, and the requirements for the impact resistance of coal mine support equipment are becoming more and more stringent. The column is the main supporting component of the support equipment. When the support is subjected to impact load, it mainly relies on the column safety valve to unload to prevent damage to the column. The safety valve has two damping unloading methods: air release and pressure relief, which are called air pressure damping and hydraulic composition respectively; for the air pressure damping method, such as announcement No. CN217055213U, a mine safety anti-collision column with a built-in air pressure anti-collision valve is disclosed, including a live column with a cavity machined in the live column, and a pneumatic anti-collision valve is arranged in the cavity. The pneumatic anti-collision valve includes a guide sleeve and a T-type valve core. The thin end of the T-type valve core is inserted into the guide sleeve, and an air cavity is left outside the thick end surface of the T-type valve core and is provided with an air vent, a pressure plug or a safety valve, and a limit step of the T-type valve core is provided on the air cavity wall. The guide sleeve is threadedly sealed and connected to the inner wall of the piston space or fixed as a whole. The pneumatic anti-collision valve can also include a separate shell, which is installed in the cavity of the piston. The column adopts an internal circulation liquid supply method, and no liquid supply port is set on the piston. The air pressure principle is used to achieve anti-collision and pressure relief of the column and its bracket.

[0003] The above technology discloses a mine safety anti-collision column with a built-in pneumatic anti-collision valve. The column achieves an anti-collision pressure-releasing damping effect by squeezing the gas in the cavity inside the column and converting the vent into a small inner diameter exhaust to perform damping and unloading. However, this gas pressure-releasing method has the following shortcomings when used:

[0004] When the gas damping is discharged when it is impacted, it is often necessary to cooperate with external gas supply equipment to supply gas or cooperate with internal circulating liquid to perform reset work; it cannot fully reset itself after the anti-impact force is unloaded, and the damping anti-impact force cannot be properly adjusted, and the flexibility of use is not ideal; in view of this, the present application proposes a mining safety anti-impact column with a built-in air pressure anti-impact valve to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a mine safety anti-collision column with a built-in air pressure anti-collision valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mine safety anti-collision column with a built-in air pressure anti-collision valve, comprising a hollow cylinder with an opening on the left side, a movable shell being sleeved on the outer side of the hollow cylinder, a connector being fixedly connected to the left side of the movable shell, a fixed sleeve in the movable shell being provided with a guide sleeve that is slidably sleeved on the outer side of the hollow cylinder, four vent holes being provided in an annular shape at equal intervals on the right side of the guide sleeve, a fixed sleeve on the hollow cylinder being provided with a first piston that is sealingly and slidably connected to the inner wall of the movable shell; the first piston is used to squeeze the gas inside when the movable shell is displaced by impact, and the gas squeezing is used to perform damping and force unloading and anti-collision work when the mine is subjected to impact;

[0007] The sealing sliding sleeve in the hollow cylinder is provided with an air pressure anti-surge valve pressure relief assembly fixedly connected to the left inner wall of the movable shell, and a first pressure relief hole connected to the interior of the hollow cylinder is opened on the top right side, and an adjustable damping rebound buffer assembly for damping rebound is installed between the right inner wall of the hollow cylinder and the air pressure anti-surge valve pressure relief assembly, and the top right side and the bottom right side of the hollow cylinder are fixedly connected with the same U-shaped connecting seat; the air pressure anti-surge valve pressure relief assembly is used to utilize the conversion into small holes to perform damping and pressure relief through exhaust when the gas inside the movable shell is squeezed, and is used to further perform damping and force unloading and anti-surge work on the gas inside the hollow cylinder when the movable shell moves to the right, and the adjustable damping rebound buffer assembly is used to elastically support the air pressure anti-surge valve pressure relief assembly and automatically reset it after pressure relief.

[0008] Preferably, the air pressure anti-surge valve pressure relief assembly includes a transverse tube fixedly connected to the left inner wall of the movable shell, and a second piston is fixedly installed on the right end of the transverse tube with a sealing sliding sleeve arranged in the hollow cylinder. A plurality of second pressure relief holes are opened on the right top of the second piston for relieving pressure when the gas inside the movable shell is squeezed. An air storage cavity is formed between the right side of the second piston and the right inner wall of the hollow cylinder, and the first pressure relief hole is used to utilize small-aperture exhaust to perform damping and pressure relief when the gas in the air storage cavity is squeezed.

[0009] Preferably, the adjustable damping rebound buffer assembly includes a T-shaped screw that is rotatably embedded in the right inner wall of the hollow cylinder, the right side of the T-shaped screw extends into the U-shaped connecting seat, and a pressure regulating plate is provided on the threaded sleeve of the T-shaped screw. A buffer spring is fixedly connected between the left side of the pressure regulating plate and the right side of the second piston. The buffer spring is movably sleeved on the T-shaped screw, and a cross guide rod is fixedly connected to the right inner wall of the hollow cylinder. The pressure regulating plate and the second piston are both slidably sleeved on the cross guide rod.

[0010] Preferably, the outer bonding sleeve of the first piston is provided with a first sealing ring, and the outer side of the first sealing ring is in sliding contact with the inner wall of the movable housing.

[0011] Preferably, a relief hole communicating with the inner side of the transverse tube is opened on the right side of the second piston, and the T-shaped screw is located in the relief hole and does not contact the inner wall of the relief hole.

[0012] Preferably, a threaded hole threadably connected to the T-shaped screw is provided on the right side of the pressure regulating plate.

[0013] Preferably, a transparent plate for observing the internal buffer spring is embedded and fixed on the front side of the hollow cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The first piston, movable housing, hollow cylinder, first pressure relief hole and air pressure anti-surge valve pressure relief assembly cooperate to utilize large-diameter gas to transform into small holes and discharge gas to release pressure when impacted. During the exhaust process, the pressure release method can be used to perform damping and unloading, thus achieving the effect of pneumatic automatic damping and unloading to prevent surges.

[0016] 2. Through the coordination of the adjustable damping rebound buffer component and the air pressure anti-shock valve pressure relief component, the entire machine can automatically rebound and reset after use and replenish gas for standby, without the need to separately inject gas or cooperate with the internal circulation liquid for reset work, thus realizing full mechanical automation use, and being able to flexibly adjust the damping anti-shock force according to use requirements and perform enhanced adjustment work when the elastic fatigue force of the buffer spring weakens, thereby improving the flexibility of use and further improving the service life and long-term stability of the buffer spring.

[0017] The utility model is provided with a series of structures, which can automatically damp and unload the force to prevent impact by converting the small holes into exhaust and holding the pressure to release the pressure when impacted, so that the whole machine can rebound and reset by itself and replenish gas for standby after use, without the need to separately inject gas or cooperate with the internal circulation liquid to perform the reset work, thereby realizing full mechanical automation use, and flexibly adjusting the damping and anti-impact force according to the use requirements and performing enhanced adjustment work when the elastic fatigue of the buffer spring weakens, thereby improving the use flexibility and the service life of the buffer spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a mine safety anti-collision column with a built-in air pressure anti-collision valve proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of a mine safety anti-collision column with a built-in air pressure anti-collision valve proposed by the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A in FIG.

[0021] In the figure: 1. Shell; 2. Hollow cylinder; 3. Connector; 4. Guide sleeve; 401. Vent; 5. First piston; 6. Cross tube; 601. Second piston; 602. Second pressure relief hole; 603. First pressure relief hole; 7. U-shaped connector; 701. T-shaped screw; 702. Pressure regulating plate; 703. Buffer spring; 704. Cross guide rod; 8. Transparent plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 3 As shown, the mine safety anti-collision column of the built-in air pressure anti-collision valve proposed in this embodiment includes a hollow cylinder 2 with an opening on the left side, a movable shell 1 is provided on the outer side of the hollow cylinder 2, a connector 3 is fixedly connected to the left side of the movable shell 1, a guide sleeve 4 is provided in the movable shell 1 and is slidably fitted on the outer side of the hollow cylinder 2, four vent holes 401 are provided in a circular shape and equidistantly on the right side of the guide sleeve 4, a first piston 5 is fixedly provided on the hollow cylinder 2 and is sealed and slidably connected to the inner wall of the movable shell 1, wherein the outer adhesive sleeve of the first piston 5 is provided with a first sealing ring, and the outer side of the first sealing ring is in sliding contact with the inner wall of the movable shell 1, so as to achieve the effect of sliding sealing between the inner side of the movable shell 1 and the outer side of the first piston 5; the first piston 5 is provided to squeeze the gas inside when the movable shell 1 is displaced by impact, and the gas extrusion is used to perform damping and unloading anti-collision work when subjected to impact during mining operation;

[0024] The sealing sliding sleeve in the hollow cylinder 2 is provided with an air pressure anti-rush valve pressure relief assembly fixedly connected to the left inner wall of the movable shell 1, and a first pressure relief hole 603 connected to the interior of the hollow cylinder 2 is opened on the top right side. An adjustable damping rebound buffer assembly for damping rebound is installed between the right inner wall of the hollow cylinder 2 and the air pressure anti-rush valve pressure relief assembly, and the top right side and the bottom right side of the hollow cylinder 2 are fixedly connected with the same U-shaped connecting seat 7; the air pressure anti-rush valve pressure relief assembly is used to utilize the conversion into small holes to perform damping and pressure relief through exhaust when the gas inside the movable shell 1 is squeezed, and is used to further perform damping and force unloading and anti-rush work on the gas inside the hollow cylinder 2 when the movable shell 1 moves to the right, and the adjustable damping rebound buffer assembly is used to elastically support the air pressure anti-rush valve pressure relief assembly and automatically reset it after pressure relief.

[0025] Specifically, the air pressure anti-surge valve pressure relief assembly includes a transverse tube 6 fixedly connected to the left inner wall of the movable shell 1, and a second piston 601 is fixedly installed on the right end of the transverse tube 6 with a sealing sliding sleeve arranged in the hollow cylinder 2, wherein the outer adhesive sleeve of the second piston 601 is provided with a second sealing ring that is in sliding contact with the inner side of the hollow cylinder 2, and a plurality of second pressure relief holes 602 for relieving pressure when the gas inside the movable shell 1 is squeezed are opened on the top right side of the second piston 601, and an air storage cavity is formed between the right side of the second piston 601 and the right inner wall of the hollow cylinder 2, and the first pressure relief hole 603 is used to utilize small-aperture exhaust to perform damping and pressure relief when the gas in the air storage cavity is squeezed; the transverse tube 6 and the second movable The plug 601 cooperates with the second pressure relief hole 602. When the internal space of the movable shell 1 is squeezed, the gas is discharged to the right through the small hole through the second pressure relief hole 602. The large-diameter gas is converted into the small hole and discharged to the right. A pressure-holding effect can be formed in the exhaust process, forming a damping and unloading anti-impact effect. When the movable shell 1 moves to the right and drives the second piston 601 to move to the right through the cross tube 6, the second piston 601 squeezes the gas inside the hollow cylinder 2. Under the squeezing pressure, the gas is discharged to the outside through the small hole through the first pressure relief hole 603. The large-diameter gas is converted into the small hole and discharged to the outside. A pressure-holding effect can be formed in the exhaust process, further forming a damping and unloading anti-impact effect, and realizing the pneumatic automatic damping and unloading anti-impact effect.

[0026] Furthermore, the adjustable damping rebound buffer assembly includes a T-shaped screw 701 rotatably embedded on the right inner wall of the hollow cylinder 2, wherein a circular through hole is provided on the right inner wall of the hollow cylinder 2, and two bearings are provided in the fixed sleeve in the circular through hole. The inner side of the inner ring of the bearing is fixedly connected to the outer side of the T-shaped screw 701, which has the effect of rotatably installing the T-shaped screw 701. The right side of the T-shaped screw 701 extends into the U-shaped connecting seat 7, and a pressure regulating plate 702 is provided on the threaded sleeve of the T-shaped screw 701, wherein a threaded hole threadedly connected to the T-shaped screw 701 is provided on the right side of the pressure regulating plate 702. The threaded connection relationship between the T-shaped screw 701 and the threaded hole is utilized to facilitate driving the pressure regulating plate 70 when the T-shaped screw 701 rotates. 2 left and right displacement effect, a buffer spring 703 is fixedly connected between the left side of the pressure regulating plate 702 and the right side of the second piston 601, and the buffer spring 703 is movably mounted on the T-shaped screw 701. A cross guide rod 704 is fixedly connected to the right inner wall of the hollow cylinder 2. The pressure regulating plate 702 and the second piston 601 are both slidably mounted on the cross guide rod 704, wherein the right bottom of the second piston 601 and the right bottom of the pressure regulating plate 702 are both provided with cross guide holes that slide with the outer side of the cross guide rod 704, which play the role of guiding the horizontal sliding of the second piston 601 and the pressure regulating plate 702. A transparent plate 8 for observing the internal buffer spring 703 is fixed on the front side of the hollow cylinder 2. The right side of the second piston 601 is provided with a The second piston 601 is driven by the movable housing 1 to move back to the left through the first pressure relief hole 603. The gas is drawn into the hollow cylinder 2, and when the movable shell 1 moves to the left, the gas is drawn back into the inside through the second pressure relief hole 602, so as to achieve the effect of automatic reset after use and replenishment of gas for standby, without the need to separately inject gas for reset work, and realize full mechanical automation; the T-shaped screw 701 is rotated forward, and the T-shaped screw 701 rotates to drive the pressure regulating plate 702 to move left, and the pressure regulating plate 702 compresses the buffer spring 703 to the left, which can change the initial compression degree of the buffer spring 703, thereby changing its elastic damping force on the second piston 601, and then facilitates further adjustment of the damping anti-impact force and enhanced adjustment work when the elastic fatigue elastic force of the buffer spring 703 weakens, thereby improving its service life and long-term stability.

[0027] When the air pressure relief valve is turned on, the air in the air vent 402 is exhausted, and the air in the air vent 403 is exhausted.

[0028] When the second piston 601 moves to the right, the buffer spring 703 is compressed to further perform buffering and damping. After the damping and anti-collision is completed, the elastic force of the buffer spring 703 in the compressed state is used to drive the second piston 601 to gradually move back to the left and reset. The second piston 601 drives the movable shell 1 to move back to the left and reset through the cross tube 6. When the second piston 601 moves to the left, external gas is drawn into the hollow cylinder 2 through the first pressure relief hole 603. When the movable shell 1 moves to the left, the gas at the right side of the first piston 5 is discharged through the vent hole 401. At the same time, when the movable shell 1 moves to the left, the gas is drawn back to the inside through the second pressure relief hole 602. This achieves the effect of self-rebounding and resetting of the whole machine after use and replenishing gas for standby. There is no need to separately inject gas or cooperate with the internal circulating liquid for reset work, thereby realizing full mechanical automatic use.

[0029] In addition, when it is necessary to increase the adjustment of the damping and anti-impact force, or when the elastic fatigue force of the buffer spring 703 becomes weak due to long-term use and needs to be strengthened and adjusted, the T-shaped screw 701 is rotated forward, and the rotation of the T-shaped screw 701 drives the pressure regulating plate 702 to move left, and the pressure regulating plate 702 compresses the buffer spring 703 to the left, which can change the initial compression degree of the buffer spring 703, thereby changing its elastic damping force on the second piston 601, thereby increasing the damping buffering force during impact, and thus facilitating further flexible adjustment of the damping and anti-impact force and enhanced adjustment work when the elastic fatigue force of the buffer spring 703 becomes weak, thereby improving the flexibility of use and improving its service life and long-term stability.

[0030] Finally, it should be noted that the above description is merely 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A mine safety anti-collision column with a built-in air pressure anti-collision valve, comprising a hollow column (2) with an opening on the left side, a movable shell (1) being sheathed on the outer side of the hollow column (2), characterized in that: The left side of the movable housing (1) is fixedly connected to a connector (3); the inner fixed sleeve of the movable housing (1) is provided with a guide sleeve (4) which is slidably fitted on the outer side of the hollow cylinder (2); the right side of the guide sleeve (4) is provided with four vent holes (401) at equal intervals in a circular shape; the upper fixed sleeve of the hollow cylinder (2) is provided with a first piston (5) which is sealingly slidably connected to the inner wall of the movable housing (1); The sealing sliding sleeve in the hollow cylinder (2) is provided with an air pressure anti-surge valve pressure relief assembly fixedly connected to the left inner wall of the movable shell (1); a first pressure relief hole (603) communicating with the interior of the hollow cylinder (2) is opened on the right side of the top of the hollow cylinder (2); an adjustable damping rebound buffer assembly for damping rebound is installed between the right inner wall of the hollow cylinder (2) and the air pressure anti-surge valve pressure relief assembly; the top right side and the bottom right side of the hollow cylinder (2) are fixedly connected to the same U-shaped connecting seat (7).

2. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 1 is characterized in that: The air pressure anti-surge valve pressure relief assembly comprises a transverse tube (6) fixedly connected to the left inner wall of the movable housing (1); a second piston (601) is fixedly mounted on the right end of the transverse tube (6) and is sealingly and slidingly sleeved in the hollow cylinder (2); a plurality of second pressure relief holes (602) for relieving pressure when the gas inside the movable housing (1) is squeezed are opened on the top right side of the second piston (601); a gas storage cavity is formed between the right side of the second piston (601) and the right inner wall of the hollow cylinder (2); and the first pressure relief hole (603) is used for damping and relieving pressure by exhausting gas with a small aperture when the gas in the gas storage cavity is squeezed.

3. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 2 is characterized in that: The adjustable damping rebound buffer assembly comprises a T-shaped screw (701) rotatably embedded on the right inner wall of the hollow cylinder (2), the right side of the T-shaped screw (701) extending into the U-shaped connecting seat (7), a pressure regulating plate (702) is threadedly sleeved on the T-shaped screw (701), a buffer spring (703) is fixedly connected between the left side of the pressure regulating plate (702) and the right side of the second piston (601), the buffer spring (703) is movably sleeved on the T-shaped screw (701), a cross guide rod (704) is fixedly connected to the right inner wall of the hollow cylinder (2), and the pressure regulating plate (702) and the second piston (601) are both slidably sleeved on the cross guide rod (704).

4. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 1 is characterized in that: The outer bonding sleeve of the first piston (5) is provided with a first sealing ring, and the outer side of the first sealing ring is in sliding contact with the inner wall of the movable housing (1).

5. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 3 is characterized in that: A relief hole communicating with the inner side of the transverse tube (6) is provided on the right side of the second piston (6), and the T-shaped screw (701) is located in the relief hole and does not contact the inner wall of the relief hole.

6. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 3 is characterized in that: A threaded hole threadedly connected to the T-shaped screw rod (701) is provided on the right side of the pressure regulating plate (702).

7. The mine safety anti-collision column with built-in air pressure anti-collision valve according to claim 3 is characterized in that: A transparent plate (8) for observing the internal buffer spring (703) is embedded and fixed on the front side of the hollow cylinder (2).

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