CN115163145B - Double-telescopic upright post for hydraulic support of high-speed coal mine - Google Patents
Double-telescopic upright post for hydraulic support of high-speed coal mine Download PDFInfo
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- CN115163145B CN115163145B CN202211077641.8A CN202211077641A CN115163145B CN 115163145 B CN115163145 B CN 115163145B CN 202211077641 A CN202211077641 A CN 202211077641A CN 115163145 B CN115163145 B CN 115163145B
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 98
- 230000008093 supporting effect Effects 0.000 claims abstract description 70
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- 238000001514 detection method Methods 0.000 claims description 2
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- 238000000429 assembly Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 230000003319 supportive effect Effects 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 description 26
- 239000003921 oil Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 239000010883 coal ash Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
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- 230000002829 reductive effect Effects 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 6
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/517—Extension elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/026—Springs wound- or coil-like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to the technical field of hydraulic support accessories, in particular to a double-telescopic upright post for a high-coal mine hydraulic support, which comprises an outer cylinder body, wherein a controller is arranged on the outer side of the outer cylinder body, a middle cylinder body is inserted into an inner cavity at one end of the outer cylinder body, a plunger is inserted into an inner cavity at one end of the middle cylinder body, sealing assemblies are arranged between the outer cylinder body and the middle cylinder body and between the middle cylinder body and the plunger, and a supporting assembly is arranged at the bottom end of the outer cylinder body; the external cylinder comprises a primary cylinder; the middle cylinder body comprises a secondary cylinder body, the secondary cylinder body is inserted into an inner cavity of the primary cylinder body, and a first displacement sensor is arranged at the bottom of the secondary cylinder body; this device is according to the work self-adaptation regulation multiunit electronic damping telescopic link of different parts to the support direction and the holding power size of outer cylinder body, and the adaptability is stronger, and rotates the switching-over effect better, and the adjustability is better, and easy and simple to handle and control performance is strong, and elastic support and protective properties are superior.
Description
Technical Field
The invention relates to the technical field of hydraulic support accessories, in particular to a double-telescopic upright post for a high-coal mine hydraulic support.
Background
The hydraulic support is a structure for controlling the mine pressure of a coal face, the mine pressure of the mining face acts on the hydraulic support in an external load mode, and in a mechanical system in which the hydraulic support and surrounding rock of the mining face interact, if the resultant force of all supporting parts of the hydraulic support and the resultant force of the external load of a top plate acting on the hydraulic support are exactly in the same straight line, the hydraulic support is very suitable for the surrounding rock of the mining face.
The hydraulic support is the important equipment of the working face of fully mechanized coal mining, and the flexible stand is the important part of hydraulic support, and at present, the hydraulic support stand that uses in the coal mining has three kinds of forms: the single telescopic vertical column, the single telescopic mechanical lengthened vertical column and the double telescopic vertical column are arranged, wherein the telescopic ratio of the double telescopic vertical column is the largest, and the requirements of most coal mines can be met.
When supporting hydraulic support, two flexible stands realize the support function through the flexible of post and well cylinder body, and in the practical application process, the amount of exercise of post and well cylinder body has certain influence to hydraulic support's supporting effect, can play stable support to the colliery for guaranteeing hydraulic support, when adjusting hydraulic support, and is particularly important to the motion control of post and well cylinder body alive.
Because the internal environment of the coal mine is severe, the coal ash is more, and the coal ash attached to the surface of the middle cylinder body and the movable column can cause the problems of blocking of the cylinder body and the like once the coal ash enters the cylinder body in the telescopic process, so that the normal use of the coal mine is influenced.
When two flexible stands support hydraulic support simultaneously, hydraulic support and heavy object exert reverse effort to two flexible stands, the outer cylinder body exerts reverse effort to bottom sprag subassembly, cause the decline of supporting component holding power easily, support the equilibrium low, two flexible stands are carrying out the hierarchical work simultaneously, if two flexible stands are in the tilt state can cause hierarchical work efficiency low, the degree of difficulty is big, and then reduce hierarchical job stability and high efficiency, especially when two flexible stands transform rotate half the district, the outer cylinder body is different to bottom sprag subassembly's effort direction, therefore the supporting component lacks the damage that can cause supporting component to the pre-support process of two flexible stands in top, reduce its durability.
Disclosure of Invention
The invention aims to provide a double-telescopic upright post for a hydraulic support of a high-coal mine, which is used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a double-telescopic upright post for a hydraulic support of a high-coal mine comprises an outer cylinder body, wherein a controller is arranged on the outer side of the outer cylinder body, a middle cylinder body is inserted into an inner cavity at one end of the outer cylinder body, a movable post is inserted into an inner cavity at one end of the middle cylinder body, sealing assemblies are arranged between the outer cylinder body and the middle cylinder body and between the middle cylinder body and the movable post, and a supporting assembly is arranged at the bottom end of the outer cylinder body;
the external cylinder comprises a primary cylinder;
the middle cylinder body comprises a secondary cylinder body, the secondary cylinder body is inserted into an inner cavity of the primary cylinder body, and a first displacement sensor is arranged at the bottom of the secondary cylinder body;
the plunger comprises a column tube, the column tube is inserted into the inner cavity of the secondary cylinder body, and a second displacement sensor is arranged at the bottom of the column tube;
the supporting component comprises a supporting seat, a movable seat is arranged below the supporting seat, a plurality of connecting seats distributed in an annular array are arranged on the outer side face of the movable seat, an electric damping telescopic rod is movably connected to the upper surface of each connecting seat through a pin shaft, and the bottom end of the electric damping telescopic rod is movably connected with the upper surface of the extending seat.
Preferably, the bottom of one-level cylinder body is equipped with the connecting block, the bottom of connecting block sets up to spherical structure, the outside bottom of one-level cylinder body is inlayed and is had the feed liquor pipe, the outside top of one-level cylinder body is inlayed and is had the fluid-discharge tube, the lateral surface bottom of one-level cylinder body is equipped with the relief valve, the one end of relief valve extends to the inside of one-level cylinder body, the lateral surface middle part of connecting block runs through and has seted up the pinhole.
Preferably, a cylinder bottom is arranged at the bottom end of the secondary cylinder body, an annular plate is arranged at the bottom end of the outer side of the cylinder bottom, the upper surface of the annular plate is fixedly connected with the bottom end of the secondary cylinder body, a groove is formed in the middle of the upper surface of the cylinder bottom, and a plurality of oil passing holes distributed in an annular array are formed in the bottom of the groove in a penetrating mode.
Preferably, the through-hole has been seted up in the middle part of the cylinder bottom through, the inside plug-in connection of through-hole has the lance, the top of lance is equipped with the sealing plug, sealing plug and recess looks adaptation, the bottom of cylinder bottom is equipped with fixed cover, lance and fixed cover through connection, the surface of lance is equipped with the locating plate, the locating plate is located fixed cover, the upper surface of locating plate passes through the lower surface swing joint of coupling spring with the cylinder bottom, the bottom of lance passes fixed cover and is equipped with the clamp plate.
Preferably, the top end of the column tube is provided with a column head, the column head is of a spherical structure, the middle of the column head is provided with a through groove in a penetrating mode, the bottom end of the column tube is provided with a piston head, and the piston head is matched with the inner cavity of the secondary cylinder body.
Preferably, the sealing assembly comprises a fixed seat, one end of each of the primary cylinder body and the secondary cylinder body is movably connected with the fixed seat through a thread, a fixed plate is arranged at the top end of the fixed seat and is of an annular structure, a first inner groove, a second inner groove and a third inner groove are sequentially formed in the inner side wall of the fixed seat from top to bottom, the section of the first inner groove is of a stepped structure, and the sections of the second inner groove and the third inner groove are of a '21274'.
Preferably, the annular groove has been seted up to the lower surface of fixed plate, first ectosome and second ectosome have been seted up from top to bottom in proper order to the lateral surface bottom of fixing base, the cross-section of first ectosome sets up to the echelonment structure, the cross-section of second ectosome sets up to the arc structure, the top of fixing base is provided with the upper strata and seals up the pad, the inside of second inside groove is provided with the second sealing washer, the inside of third inside groove is provided with the third sealing washer, the outside of fixing base has set gradually first sealed pad, the sealed pad of second and the sealed pad of third from top to bottom.
Preferably, the lower surface of the upper sealing gasket is provided with a first sealing ring, the cross section of the first sealing ring is arranged to be of a stepped structure, the first sealing ring is matched with the first inner groove, the middle part of the upper surface of the second sealing ring is provided with an annular convex block, the bottom end of the first sealing ring is attached to the annular convex block, the middle part of the outer side of the third sealing ring is provided with an annular block, the annular block is matched with the third inner groove, the top end of the third sealing ring is provided with an annular clamping groove, the bottom end of the second sealing ring is matched with the annular clamping groove, the upper surface of the first sealing gasket is provided with an annular bulge, the annular bulge is matched with the annular groove, the second sealing gasket is matched with the first outer groove, the bottom end of the second sealing gasket is provided with an extension sealing ring, the extension sealing ring extends into the second outer groove, and the third sealing gasket is connected with the extension sealing ring in a sleeved mode.
Preferably, spherical groove has been seted up at the upper surface middle part of supporting seat, spherical groove and connecting block looks adaptation, the notch department in spherical groove is equipped with the engaging lug of two symmetric distributions, the engaging lug is corresponding with the pinhole, the spacing groove has been seted up at the lower surface middle part of supporting seat, the cross-section of spacing groove sets up to "T" shape structure, the upper surface middle part of sliding seat is equipped with the stopper, stopper and spacing groove looks adaptation, the below of sliding seat is provided with the base.
Preferably, the lower surface middle part of sliding seat and the upper surface middle part of base all are equipped with the supporting shoe, the one end of supporting shoe sets up to the arc structure, the lateral surface of base is equipped with four and is the extension seat that the annular array distributes, shock absorber spring has been cup jointed in the outside of electric damping telescopic link, the lateral surface of base is equipped with a plurality of installation covers that are the annular array and distribute.
The invention has the technical effects and advantages that:
1. according to the invention, the outer cylinder body is arranged, so that the double extension of the upright post is realized, the control of the centering cylinder body and the plunger is realized, and the plunger and the middle cylinder body respectively move when the upright post adjusts the hydraulic support, so that the stability of the hydraulic support can be ensured.
2. According to the invention, the sealing assemblies are arranged at the top ends of the outer cylinder body and the middle cylinder body, and can realize the sealing effect between the outer cylinder body and the middle cylinder body and between the middle cylinder body and the plunger, so that coal ash can be prevented from entering the cylinder body, and the normal operation of the device can be ensured without being influenced by the coal ash.
3. According to the invention, the supporting component is arranged, the supporting component can play a supporting effect on the outer cylinder body, so that the connection between the device and the hydraulic support can be realized, the supporting component is provided with the plurality of electric damping telescopic rods and the shock absorption springs, when the device receives external influence and vibrates, the electric damping telescopic rods and the shock absorption springs are matched, so that the energy absorption of the vibration can be counteracted, the shock absorption effect on the device can be realized, and the normal use of the device is further ensured.
4. According to the invention, through arranging the first displacement sensor and the second displacement sensor, the supporting direction and the supporting force of a plurality of groups of electric damping telescopic rods to the outer cylinder body are adaptively adjusted according to the work of different parts, so that the adaptability is stronger, the rotation reversing effect is better, the adjustability is better, the operation is simple and convenient, the control performance is strong, the elastic support and protection performance are superior, reverse pre-supporting force can be applied to the movable seat when the outer cylinder body rotates in different half areas, the support efficiency and stability are further improved, particularly, the outer cylinder body is in a vertical state when a sealing plug is separated from a groove, the grading support efficiency is further ensured to be high, and the grading difficulty is low.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic diagram showing the positional relationship of the outer cylinder, the middle cylinder, the plunger and the sealing assembly of the present invention.
Fig. 3 is a schematic cross-sectional view of the outer cylinder, the middle cylinder, the plunger and the sealing assembly of the present invention.
Fig. 4 is a schematic diagram of the position relationship between the middle cylinder body and the plunger of the invention.
Fig. 5 is a schematic view of the cylinder bottom structure of the present invention.
Fig. 6 is a schematic cross-sectional view of the cylinder bottom structure of the present invention.
Fig. 7 is a schematic cross-sectional view of the seal assembly structure of the present invention.
Fig. 8 is an exploded view of the seal assembly of the present invention.
FIG. 9 is a cross-sectional view of the fixing base of the present invention.
FIG. 10 is a schematic view of the construction of the upper gasket of the present invention.
Fig. 11 is a schematic structural view of a second seal ring according to the present invention.
Fig. 12 is a schematic structural view of a third seal ring according to the present invention.
Fig. 13 is a schematic view of a first gasket structure of the present invention.
Fig. 14 is a schematic view of a second gasket structure of the present invention.
FIG. 15 is a schematic structural view of a support assembly of the present invention.
Fig. 16 is a schematic structural diagram of the movable seat of the present invention.
Fig. 17 is a schematic view of a supporting seat structure of the present invention.
In the figure: 1. an outer cylinder body; 2. a middle cylinder body; 3. a plunger; 4. a seal assembly; 5. a support assembly; 101. a primary cylinder block; 102. connecting blocks; 103. a liquid inlet pipe; 104. a liquid discharge pipe; 105. a safety valve; 106. a pin hole; 201. a secondary cylinder body; 202. a cylinder bottom; 203. an annular plate; 204. a groove; 205. an oil passing hole; 206. a through hole; 207. a ram; 208. a sealing plug; 209. fixing a sleeve; 210. positioning a plate; 211. pressing a plate; 301. a column tube; 302. a column cap; 303. a piston head; 401. a fixed seat; 402. a fixing plate; 403. a first inner tank; 404. a second inner tank; 405. a third inner tank; 406. an annular groove; 407. a first outer tank; 408. a second outer tank; 409. an upper layer of gasket; 410. a second seal ring; 411. a third seal ring; 412. a first gasket; 413. a second gasket; 414. a third gasket; 415. a first seal ring; 416. an annular projection; 417. a ring block; 418. an annular neck; 419. an annular projection; 420. extending the seal ring; 501. a supporting seat; 502. a spherical groove; 503. connecting lugs; 504. a limiting groove; 505. a movable seat; 506. a limiting block; 507. a base; 508. a support block; 509. an extension base; 510. a connecting seat; 511. an electric damping telescopic rod; 512. and (7) installing a sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
The invention provides a double-telescopic upright post for a hydraulic support of a high coal mine, which is shown in figures 1 to 17 and comprises an outer cylinder body 1, a middle cylinder body 2, a movable post 3, a sealing component 4 and a supporting component 5, wherein the middle cylinder body 2 is inserted into an inner cavity at one end of the outer cylinder body 1, the movable post 3 is inserted into an inner cavity at one end of the middle cylinder body 2, the sealing components 4 are arranged between the outer cylinder body 1 and the middle cylinder body 2 and between the middle cylinder body 2 and the movable post 3, and the supporting component 5 is arranged at the bottom end of the outer cylinder body 1.
Outer cylinder body 1 includes one-level cylinder body 101, the bottom of one-level cylinder body 101 is equipped with connecting block 102, the bottom of connecting block 102 sets up to spherical structure, the outside bottom of one-level cylinder body 101 is inlayed and is had feed liquor pipe 103, the outside top of one-level cylinder body 101 is inlayed and is had fluid-discharge tube 104, the one end of feed liquor pipe 103 and fluid-discharge tube 104 is all through valve and oil pump connection, the lateral surface bottom of one-level cylinder body 101 is equipped with relief valve 105, the one end of relief valve 105 extends to the inside of one-level cylinder body 101, the lateral surface middle part of connecting block 102 runs through and has seted up pinhole 106.
The middle cylinder body 2 comprises a second-stage cylinder body 201, the second-stage cylinder body 201 is embedded and connected with the first-stage cylinder body 101 in an inserted mode, a cylinder bottom 202 is arranged at the bottom end of the second-stage cylinder body 201, an annular plate 203 is arranged at the bottom end of the outer side of the cylinder bottom 202, the upper surface of the annular plate 203 is fixedly connected with the bottom end of the second-stage cylinder body 201, a groove 204 is formed in the middle of the upper surface of the cylinder bottom 202, and a plurality of oil passing holes 205 distributed in an annular array mode penetrate through the bottom of the groove 204.
Specifically, a through hole 206 is formed in the middle of the cylinder bottom 202 in a penetrating manner, a striker 207 is inserted into the through hole 206, a sealing plug 208 is arranged at the top end of the striker 207, the sealing plug 208 is matched with the groove 204, a fixing sleeve 209 is arranged at the bottom end of the cylinder bottom 202, the striker 207 is connected with the fixing sleeve 209 in a penetrating manner, and a positioning plate 210 is arranged on the outer surface of the striker 207.
More specifically, the positioning plate 210 is located in the fixing sleeve 209, the upper surface of the positioning plate 210 is movably connected with the lower surface of the cylinder bottom 202 through a connecting spring, the bottom end of the striker 207 penetrates through the fixing sleeve 209 to be provided with a pressing plate 211, when the secondary cylinder body 201 moves to the inner bottom end of the primary cylinder body 101, the pressing plate 211 is pressed by the inner wall of the bottom end of the primary cylinder body 101 to move upwards, the pressing plate 211 drives the striker 207 to move upwards and drives the sealing plug 208 to move upwards, the sealing plug 208 is separated from the oil passing hole 205, and hydraulic oil inside the primary cylinder body 101 can enter the secondary cylinder body 201 through the oil passing hole 205.
The plunger 3 comprises a plunger tube 301, the plunger tube 301 is inserted into the inner cavity of the secondary cylinder 201, a plunger head 302 is arranged at the top end of the plunger tube 301, the plunger head 302 is of a spherical structure, a through groove is formed in the middle of the plunger head 302 in a penetrating mode, a plunger head 303 is arranged at the bottom end of the plunger tube 301, and the plunger head 303 is matched with the secondary cylinder 201.
Seal assembly 4 includes fixing base 401, and the one end of one-level cylinder body 101, second grade cylinder body 201 all has fixing base 401 through screw thread swing joint, and fixing base 401's top is equipped with fixed plate 402, and fixed plate 402 sets up to the loop configuration, and first inside groove 403, second inside groove 404, third inside groove 405 have been seted up in proper order from top to bottom to fixing base 401's inside wall.
Specifically, the section of the first inner groove 403 is set to be a stepped structure, the sections of the second inner groove 404 and the third inner groove 405 are both set to be a '21274', the lower surface of the fixing plate 402 is provided with an annular groove 406, the bottom end of the outer side surface of the fixing seat 401 is sequentially provided with a first outer groove 407 and a second outer groove 408 from top to bottom, the section of the first outer groove 407 is set to be a stepped structure, the top end of the fixing seat 401 is provided with an upper layer sealing gasket 409, the lower surface of the upper layer sealing gasket 409 is provided with a first sealing ring 415, and the first sealing ring 415 is matched with the first inner groove 403.
More specifically, the top looks adaptation of upper sealing gasket 409 and fixed plate 402, upper sealing gasket 409 can completely cut off the coal ash in the second grade cylinder body 201 and the pillar pipe 301 outside to inside avoiding coal ash to get into the cylinder body, simultaneously, the echelonment structure setting of upper sealing gasket 409 makes upper sealing gasket 409 have good compressive property, thereby has avoided upper sealing gasket 409 to follow second grade cylinder body 201 or pillar pipe 301 and has slided from top to bottom.
The inside of second inner groove 404 is provided with second sealing washer 410, and the cross-section of first sealing washer 415 sets up to the echelonment structure, and the cross-section of second outer groove 408 sets up to the arc structure, and the upper surface middle part of second sealing washer 410 is equipped with annular lug 416, and the bottom of first sealing washer 415 is laminated with annular lug 416 mutually, and first sealing washer 415 and the cooperation of annular lug 416 can realize promoting the sealed effect between fixing base 401 and one-level cylinder body 101, fixing base 401 and second grade cylinder body 201.
Moreover, a third sealing ring 411 is arranged inside the third inner groove 405, an annular block 417 is arranged in the middle of the outer side of the third sealing ring 411, the annular block 417 is matched with the third inner groove 405, an annular clamping groove 418 is formed in the top end of the third sealing ring 411, the bottom end of the second sealing ring 410 is matched with the annular clamping groove 418, and the second sealing ring 410 is matched with the third sealing ring 411 to offset the effect of hydraulic oil inside the cylinder body on the upper-layer sealing gasket 409, so that the sealing effect of the upper-layer sealing gasket 409 can be ensured.
Meanwhile, the outside of the fixing seat 401 is sequentially provided with a first sealing gasket 412, a second sealing gasket 413 and a third sealing gasket 414 from top to bottom, the upper surface of the first sealing gasket 412 is provided with an annular protrusion 419, the annular protrusion 419 is matched with the annular groove 406, the second sealing gasket 413 is matched with the first outer groove 407, the bottom end of the second sealing gasket 413 is provided with an extension sealing ring 420, the extension sealing ring 420 extends into the second outer groove 408, the third sealing gasket 414 is connected with the extension sealing ring 420 in a sleeved mode, the third sealing gasket 414 can limit the extension sealing ring 420 in the second outer groove 408, so that the position of the second sealing gasket 413 can be fixed, the second sealing gasket 413 can offset the pressure effect of hydraulic oil between the fixing seat 401 and the primary cylinder body 101, and between the fixing seat 401 and the secondary cylinder body 201, and further guarantee the stability of the fixing seat 401.
Supporting component 5 includes supporting seat 501, spherical groove 502 has been seted up at the upper surface middle part of supporting seat 501, spherical groove 502 and connecting block 102 looks adaptation, the notch department of spherical groove 502 is equipped with two engaging lugs 503 along the median vertical plane symmetric distribution of supporting seat 501 front and back terminal surface, engaging lug 503 is corresponding with pinhole 106, spacing groove 504 has been seted up at the lower surface middle part of supporting seat 501, the cross-section of spacing groove 504 sets up to "T" shape structure, the below of supporting seat 501 is provided with movable seat 505, the upper surface middle part of movable seat 505 is equipped with stopper 506, stopper 506 and spacing groove 504 looks adaptation, stopper 506 and spacing groove 504 cooperation, make and to rotate relatively between movable seat 505 and the supporting seat 501, thereby the installation and the adjustment of device have been made things convenient for.
Specifically, the below of sliding seat 505 is provided with base 507, the lower surface middle part of sliding seat 505 and the upper surface middle part of base 507 all are equipped with supporting shoe 508, the one end of supporting shoe 508 sets up to the arc structure, two supporting shoe 508 cooperations, make base 507 to support sliding seat 505, the lateral surface of base 507 is equipped with four extension seats 509 that are the ring array and distribute, the lateral surface of sliding seat 505 is equipped with four connecting seats 510 that are the ring array and distribute, the upper surface of connecting seat 510 has electric damping telescopic link 511 through round pin axle swing joint, electric damping telescopic link 511's bottom and the upper surface swing joint who extends seat 509, the spring of moving away to avoid possible earthquakes has been cup jointed in electric damping telescopic link 511's the outside.
More specifically, when the device shakes because of external environment, relative change takes place for the position between sliding seat 505 and the base 507, and electric damping telescopic link 511 and the cooperation of shock-absorbing spring this moment can offset the energy absorption of vibrations and realize the shock attenuation buffering to the device, and then has guaranteed the steady operation of device, and the lateral surface of base 507 is equipped with a plurality of installation cover 512 that are the ring array and distribute, and the setting up of installation cover 512 has made things convenient for the device to install on hydraulic support.
This device is when using, is connected with supporting component 5 through the pin rod with the bottom of outer cylinder body 1 to pass through fasteners such as bolt with supporting component 5 and fix in hydraulic support's bottom, pass through the round pin hub fixation on hydraulic support's top with the top of plunger 3, can accomplish the installation of device, and when the device was used, hydraulic oil was injected into outer cylinder body 1 and well cylinder body 2 in through the oil pump, thereby realizes centering cylinder body 2 and plunger 3's drive, and then realizes adjustment and support to hydraulic support.
When the device is used for lifting a column, hydraulic oil is injected into the liquid inlet pipe 103 through the oil pump, the pressure of the hydraulic oil in the primary cylinder body 101 is increased, the hydraulic oil in the primary cylinder body 101 acts on the cylinder bottom 202 at the bottom end of the secondary cylinder body 201, so that the cylinder bottom 202 is pushed to move upwards, at the moment, the cylinder bottom 202 can move upwards, the pressure on the pressing plate 211 is smaller than the elastic force of the connecting spring to the positioning plate 210, the pressing plate 211 is static relative to the cylinder bottom 202, the cylinder bottom 202 drives the secondary cylinder body 201 to move upwards, the secondary cylinder body 201 drives the plunger 3 to move upwards, the plunger 3 and the secondary cylinder body 201 are static relatively until the secondary cylinder body 201 moves to the top end of the primary cylinder body 101, the hydraulic oil in the primary cylinder body 101 acts on the positioning plate 208 through the oil through hole 205, meanwhile, the pressure on the pressing plate 211 is larger than the elastic force of the connecting spring to the positioning plate 210, the pressing plate 211 drives the plunger rod 207 to move upwards, the hydraulic oil in the primary cylinder body 101 enters the secondary cylinder body 303 through the oil hole 205, so that the pressure in the secondary cylinder body 201 is increased, the hydraulic oil pressure in the secondary cylinder body 201, the plunger head 303 drives the plunger 301 to move upwards under the action of the hydraulic oil, and the plunger head 303 to lift the column head 201, thereby realizing the function of the column.
When the device bears the hydraulic support, the pressure of the top plate of the hydraulic support is transmitted to the column pipe 301 through the column head 302 and then transmitted to the piston head 303, the valves on the liquid inlet pipe 103 and the liquid outlet pipe 104 are both in a closed state, the piston head 303 transmits the pressure into the primary cylinder 101 through hydraulic oil, the pressure in the primary cylinder 101 is increased, when the pressure exceeds the bearing limit of the primary cylinder 101, the safety valve 105 is opened to unload the force, the secondary cylinder 201 contracts until the pressure is reduced to the bearing limit of the primary cylinder 101, then the safety valve 105 is closed, the device continues to support the hydraulic support, when the secondary cylinder 201 does not contract completely, the pressure transmission of the top plate of the hydraulic support and the opening and closing of the safety valve 105 can be carried out repeatedly, when the secondary cylinder 201 contracts completely, the pressure plate 211 is extruded by the inner wall of the bottom end of the primary cylinder 101 to move upwards, the secondary cylinder 201 can enter the primary cylinder 101, and the column pipe 301 can contract downwards, so that the hydraulic oil supported by the column is within the bearing limit of the hydraulic support.
When the device is used for lowering a column, hydraulic oil in the first-stage cylinder body 101 is pumped out through the oil pump and the liquid discharge pipe 104, the second-stage cylinder body 201 moves downwards under the action of the hydraulic oil pressure until the second-stage cylinder body 201 moves to the bottom end inside the first-stage cylinder body 101, the pressing plate 211 is extruded by the inner wall of the bottom end of the first-stage cylinder body 101 to move upwards, the pressing plate 211 drives the collision rod 207 to move upwards to drive the sealing plug 208 to move upwards, the sealing plug 208 is separated from the oil passing hole 205, the hydraulic oil in the second-stage cylinder body 201 enters the first-stage cylinder body 101 through the oil passing hole 205, and the piston head 303 moves downwards under the action of the pressure, so that the column pipe 301 moves downwards, and the column lowering function can be realized.
Second embodiment
Based on first embodiment, because two flexible stands support the angle and constantly change at the during operation, consequently its holding power and the support angle to hydraulic support constantly change, consequently two flexible stands constantly change to the effort size and the direction of the supporting component 5 of bottom, in order to improve the supporting stability of supporting component 5 to two flexible stands, this high colliery hydraulic support still includes when in-service use with two flexible stands: the outer side of the outer cylinder body 1 is provided with a controller which electrically controls each electrical element, the bottom of the secondary cylinder body 201 is provided with a first displacement sensor, specifically, the first displacement sensor is arranged at the bottom of the pressing plate 211, and the first displacement is used for detecting the displacement distance of the secondary cylinder body 201 in the primary cylinder body 101; the bottom of column tube 301 is equipped with the second displacement sensor, and specifically, the second displacement sensor sets up in the bottom of piston head 303, and the second displacement sensor is used for detecting the displacement distance of piston head 303 in secondary cylinder 201, and then corresponds different parts of control through different detection data and carry out work.
When the device is used specifically, the installation needs to be carried out according to the following process, namely, when the secondary cylinder body 201 moves to the inner top end of the primary cylinder body 101, the outer cylinder body 1 drives the middle cylinder body 2 and the plunger 3 to be in a vertical state, and compared with the inclined arrangement of the outer cylinder body 1, the thrust of the hydraulic oil in the primary cylinder body 101 to the bottom of the pressing plate 211 is more uniform and stable in the arrangement mode, so that the pressing plate 211 drives the positioning plate 210 to extrude the connecting spring to move upwards through the striker 207 under the thrust action of the hydraulic oil, namely, when the secondary cylinder body 201 moves to the inner top of the primary cylinder body 101, the hydraulic oil pressure in the primary cylinder body 101 is continuously increased and drives the pressing plate 211 to continuously move upwards, the striker 207 drives the positioning plate 210 to extrude the connecting spring, the hydraulic oil pressure is greater than the elastic force of the connecting spring, and finally, the striker 207 drives the sealing plug 208 to be separated from the groove 204, so that the hydraulic oil in the primary cylinder body 101 reaches the groove 204 along the oil hole 205 and enters the secondary cylinder body 201 along the groove 204 to drive the piston head 303 to continuously move upwards.
Therefore, in the process, when hydraulic oil is injected into the primary cylinder body 101 along the liquid inlet pipe 103, the secondary cylinder body 201 is driven to move upwards in the primary cylinder body 101 by the thrust of the hydraulic oil, and the hydraulic support and the heavy object at the top are driven to rotate upwards by the aid of the movable column 3 inside the secondary cylinder body 201, the displacement value detected by the first displacement sensor is continuously increased, meanwhile, due to the thrust of the hydraulic oil in the primary cylinder body 101 and the reverse oblique downward pressure exerted by the hydraulic support and the heavy object at the top of the movable column 3 on the primary cylinder body 101, the reverse acting force of the primary cylinder body 101 on the bottom support assembly 5 is also continuously changed, specifically, when the position value detected by the first displacement sensor is increased, namely, the secondary cylinder body 201 moves upwards in the primary cylinder body 101, because the tops of the secondary cylinder body 201 and the inner movable column 3 are limited and hinged by the hydraulic support, the acute included angle between the outer cylinder body 1 and the vertical direction is gradually reduced, and the pressure value of the hydraulic support and the heavy object on the double telescopic columns is increased
Wherein G is the gravity value of the hydraulic support and the weight,
the included angle between the outer cylinder body 1 and the vertical direction is an acute angle value, the pressure value of the hydraulic support and the heavy object to the double telescopic columns is increased along with the increase of the displacement value detected by the first displacement sensor, meanwhile, the pressure value can be reversely applied to the top of the supporting assembly 5 when the double telescopic columns are stressed, and the supporting assembly 5 controls the stability of the movable seat 505 through the plurality of groups of electric damping telescopic rods 511, so that the outer cylinder body 1 performs action on the horizontal direction of the top of the supporting assembly 5 in the processMagnitude of the applied force
And since the acute included angle of the outer cylinder body 1 in the vertical direction is reduced when the displacement value detected by the first displacement sensor is increased, the counter acting force of the hydraulic bracket and the heavy object to the support assembly 5 through the outer cylinder body 1, the middle cylinder body 2 and the plunger 3 is gradually reduced when the displacement value detected by the first displacement sensor is increased.
Because the peripheral side surface of the supporting component 5 is elastically supported by the multiple groups of electric damping telescopic rods 511, in order to ensure the supporting stability of the supporting component 5 to the external cylinder body 1, at this time, the controller controls the multiple groups of electric damping telescopic rods 511, which are opposite to the moving direction of the external cylinder body 1, to start and provide a supporting force for the movable seat 505, specifically, as shown in the figure, in an initial state, the external cylinder body 1 continuously rotates upwards on the right side of the supporting component 5, the controller controls the two electric damping telescopic rods 511 on the left side of the movable seat 505 to start and provide a supporting force for the movable seat 505, so that the external cylinder body 1 is prevented from exerting an unbalanced acting force on the movable seat 505 under the pressure action of a hydraulic support and a heavy object, and the situations that the movable seat 505 tilts and shakes are finally caused, and the supporting stability of the supporting component 5 to the external cylinder body 1 is reduced.
And when the displacement value that first displacement sensor detected constantly increases, the acute angle contained angle in external cylinder body 1 and the vertical direction reduces gradually, known from the above-mentioned formula that hydraulic support and heavy object pass through external cylinder body 1, well cylinder body 2 and the column 3 is constantly reduced to the counter-acting force of sliding seat 505, then the controller control left side two sets of electric damping telescopic links 511 reduce gradually to the supporting acting force that sliding seat 505 was applyed, and then realize that electric damping telescopic link 511 supports the adjustment to the adaptability of sliding seat 505, improve the connection stability and the high efficiency of sliding seat 505.
When the displacement value detected by the first displacement sensor reaches the set first displacement preset value, it is indicated that the bottom of the secondary cylinder body 201 reaches the top of the primary cylinder body 101, at this time, the outer cylinder body 1 is in a vertical state, the acting force direction of the hydraulic support and the weight on the double telescopic columns is vertical downward, the acting force direction of the outer cylinder body 1 on the support assembly 5 is also vertical downward, the controller controls the electric damping telescopic rods 511 to stop working, at this time, the peripheral side of the movable seat 505 is elastically supported only by the damping springs on the outer surfaces of the groups of electric damping telescopic rods 511, the support is stable, and the damping and buffering performance is excellent.
When the double telescopic columns continue to work, namely, hydraulic oil is continuously discharged into the first-stage cylinder body 101 along the liquid inlet pipe 103, the hydraulic oil in the first-stage cylinder body 101 drives the sealing plug 208 at the top to move upwards and separate from the groove 204 under the action of thrust by means of the pressing plate 211 and the striking rod 207, the displacement value detected by the first displacement sensor continues to increase by a certain value on the basis of the first displacement preset value, at the moment, the controller controls the plurality of groups of electric damping telescopic rods 511 at the other direction to start, as shown in the figure, the controller controls the two groups of electric damping telescopic rods 511 at the right side to start to work, so that a pre-supporting force is provided for the left half-zone rotation of the subsequent outer cylinder body 1, the insufficient supporting force of the bottom supporting component 5 is effectively avoided when the outer cylinder body 1 suddenly rotates, and the stability and the durability of the movable seat 505 are further improved.
Similarly, when the piston head 303 continuously moves upwards along the inside of the secondary cylinder body 201, the displacement value detected by the second displacement sensor continuously increases, and the corresponding external cylinder body 1 rotates along the other half area, that is, the external cylinder body 1 rotates along the left side and the acute angle with the vertical direction continuously increases, as can be known from the above formula, the controller controls the multiple groups of electric damping telescopic rods 511 opposite to the rotation direction of the external cylinder body 1 to start and provide supporting force for the movable seat 505, that is, the controller controls the two sides of the electric damping telescopic rods 511 on the right side to start and the supporting force to continuously increase, so as to effectively perform elastic support on the movable seat 505, further improve the stability and the efficiency of the device, and avoid the reduction of the supporting force of the supporting component 5 during the further rotation support of the hydraulic support and the heavy object, and the reduction of the elastic support and the protection performance.
When the device needs to be recycled after the completion of work, the device only needs to work reversely according to the process, and the recycling process is simple and stable in operation and efficient and quick.
The device is according to the work self-adaptation regulation multiunit electric damping telescopic link 511 support direction and the holding power size of external cylinder body 1 of different parts, the adaptability is stronger, and it is better to rotate the switching-over effect, the adjustability is better, easy and simple to handle and control performance are strong, elastic support and protective properties are superior, and external cylinder body 1 can exert reverse pre-supporting power to sliding seat 505 when different half district rotate, further improve the high efficiency and the stability ability of support, external cylinder body 1 is in vertical state when realizing that sealing plug 208 breaks away from with recess 204, and then guarantee hierarchical support efficiency height, the hierarchical degree of difficulty is low.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A double-telescopic upright post for a hydraulic support of a high-coal mine is characterized by comprising an outer cylinder body, wherein a controller is arranged on the outer side of the outer cylinder body and electrically controls each electrical element;
the external cylinder comprises a primary cylinder;
the middle cylinder body comprises a second-stage cylinder body, the second-stage cylinder body is inserted into an inner cavity of the first-stage cylinder body, a first displacement sensor is arranged at the bottom of the second-stage cylinder body and arranged at the bottom of the pressing plate, and the first displacement is used for detecting the displacement distance of the second-stage cylinder body in the first-stage cylinder body;
the plunger comprises a column tube, the column tube is inserted into the inner cavity of the secondary cylinder body, the bottom of the column tube is provided with a second displacement sensor, the second displacement sensor is arranged at the bottom of the piston head, and the second displacement sensor is used for detecting the displacement distance of the piston head in the secondary cylinder body;
different parts are correspondingly controlled to work through different detection data so as to adaptively adjust the supporting direction and the supporting force of a plurality of groups of electric damping telescopic rods on the outer cylinder body;
the supporting component comprises a supporting seat, a movable seat is arranged below the supporting seat, a plurality of connecting seats distributed in an annular array are arranged on the outer side face of the movable seat, an electric damping telescopic rod is movably connected to the upper surface of each connecting seat through a pin shaft, and the bottom end of the electric damping telescopic rod is movably connected with the upper surface of the extending seat.
2. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 1, wherein: the bottom of one-level cylinder body is equipped with the connecting block, the bottom of connecting block sets up to spherical structure, the outside bottom of one-level cylinder body is inlayed and is had the feed liquor pipe, the outside top of one-level cylinder body is inlayed and is had the fluid-discharge tube, the lateral surface bottom of one-level cylinder body is equipped with the relief valve, the one end of relief valve extends to the inside of one-level cylinder body, the lateral surface middle part of connecting block runs through and has seted up the pinhole.
3. The double-telescopic upright post for the hydraulic support of the high coal mine according to claim 2, characterized in that: the bottom of second grade cylinder body is provided with the jar bottom, the outside bottom of jar bottom is equipped with the annular plate, the upper surface of annular plate and the bottom fixed connection of second grade cylinder body, the upper surface middle part of jar bottom is seted up flutedly, the tank bottom of recess is run through and is seted up a plurality of oilholes that cross that are the annular array and distribute.
4. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 3, wherein: the middle part of the cylinder bottom is run through and is seted up the through-hole, the inside grafting of through-hole is connected with the lance, the top of lance is equipped with the sealing plug, sealing plug and recess looks adaptation, the bottom of cylinder bottom is equipped with fixed cover, lance and fixed cover through connection, the surface of lance is equipped with the locating plate, the locating plate is located fixed cover, the upper surface of locating plate passes through the lower surface swing joint of coupling spring with the cylinder bottom, the bottom of lance passes fixed cover and is equipped with the clamp plate.
5. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 1, wherein: the top end of the column tube is provided with a column head which is of a spherical structure, the middle of the column head is provided with a through groove in a penetrating mode, the bottom end of the column tube is provided with a piston head, and the piston head is matched with the inner cavity of the secondary cylinder body.
6. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 1, wherein: the sealing assembly comprises a fixed seat, one end of each of the primary cylinder body and the secondary cylinder body is movably connected with the fixed seat through threads, a fixed plate is arranged at the top end of the fixed seat and is of an annular structure, a first inner groove, a second inner groove and a third inner groove are sequentially formed in the inner side wall of the fixed seat from top to bottom, the section of the first inner groove is of a stepped structure, and the sections of the second inner groove and the third inner groove are of a '21274'.
7. The double-telescopic upright post for the hydraulic support of the high coal mine according to claim 6, wherein: the ring channel has been seted up to the lower surface of fixed plate, first ectosome and second ectosome have been seted up from top to bottom in proper order to the lateral surface bottom of fixing base, the cross-section of first ectosome sets up to the echelonment structure, the cross-section of second ectosome sets up to the arc structure, the top of fixing base is provided with the upper strata and seals up the pad, the inside of second inside groove is provided with the second sealing washer, the inside of third inside groove is provided with the third sealing washer, the outside of fixing base has set gradually first sealed pad, the sealed pad of second and the sealed pad of third from top to bottom.
8. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 7, wherein: the lower surface of the upper sealing pad is provided with a first sealing ring, the cross section of the first sealing ring is arranged to be of a stepped structure, the first sealing ring is matched with a first inner groove, the middle part of the upper surface of the second sealing ring is provided with an annular convex block, the bottom end of the first sealing ring is attached to the annular convex block, the middle part of the outer side of the third sealing ring is provided with an annular block, the annular block is matched with a third inner groove, the top end of the third sealing ring is provided with an annular clamping groove, the bottom end of the second sealing ring is matched with the annular clamping groove, the upper surface of the first sealing pad is provided with an annular bulge, the annular bulge is matched with the annular groove, the second sealing pad is matched with a first outer groove, the bottom end of the second sealing pad is provided with an extension sealing ring, the extension sealing ring extends into a second outer groove, and the third sealing pad is connected with the extension sealing ring in a sleeved mode.
9. The double-telescopic upright post for the hydraulic support of the high-coal mine as claimed in claim 2, wherein: spherical groove has been seted up at the upper surface middle part of supporting seat, spherical groove and connecting block looks adaptation, the notch department in spherical groove is equipped with the engaging lug of two symmetric distributions, the engaging lug is corresponding with the pinhole, the spacing groove has been seted up at the lower surface middle part of supporting seat, the cross-section in spacing groove sets up to "T" shape structure, the upper surface middle part of sliding seat is equipped with the stopper, stopper and spacing groove looks adaptation, the below of sliding seat is provided with the base.
10. The double-telescopic upright post for the hydraulic support of the high coal mine according to claim 9, wherein: the lower surface middle part of sliding seat and the upper surface middle part of base all are equipped with the supporting shoe, the one end of supporting shoe sets up to the arc structure, the lateral surface of base is equipped with four and is the extension seat that the annular array distributes, shock-absorbing spring has been cup jointed in electric damping telescopic link's the outside, the lateral surface of base is equipped with a plurality of installation covers that are the annular array and distribute.
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