CN110761790A - Coal mining machine supporting assembly with adjustable height - Google Patents
Coal mining machine supporting assembly with adjustable height Download PDFInfo
- Publication number
- CN110761790A CN110761790A CN201911144133.5A CN201911144133A CN110761790A CN 110761790 A CN110761790 A CN 110761790A CN 201911144133 A CN201911144133 A CN 201911144133A CN 110761790 A CN110761790 A CN 110761790A
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- oil
- piston
- guide sleeve
- height
- supporting seat
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- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000005065 mining Methods 0.000 title claims abstract description 48
- 210000005069 ears Anatomy 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a height-adjustable coal mining machine supporting assembly which comprises a sliding shoe, a supporting seat, a piston, a supporting leg, a guide sleeve and a two-way hydraulic control one-way valve, wherein the lower part of the supporting leg is hinged with the sliding shoe, an upper section rectangular groove and a lower section circular groove are arranged in the supporting leg, the guide sleeve is in threaded connection with the upper part in the circular groove, the middle part and the lower part of the supporting seat are respectively made into rod-shaped structures with rectangular cross sections and circular cross sections, the piston is in threaded sleeve connection with the lower section of the rod-shaped structure with the circular cross section, the space below the guide sleeve and the circular groove in the circular groove are in up-and-down sliding fit to form an oil cylinder structure, and two cavities above. The invention has long service life, can improve the coal loading capacity of the coal mining machine in a down-mining state, can absorb partial vibration of the coal mining machine and prolong the service life of the roller of the coal mining machine.
Description
Technical Field
The invention relates to a supporting assembly of a coal mining machine, which is adjustable in height and belongs to the technical field of coal mining equipment.
Background
The supporting component is one of key components for supporting the coal mining machine and enabling the coal mining machine to walk, one end of the supporting component is connected with a machine body of the coal mining machine through a pin shaft component, and the other end of the supporting component rides on a shovel plate or a groove side plate of the scraper conveyor through a sliding shoe. The supporting component is a vulnerable part in the coal mining machine, and the loss is mainly represented as sliding shoe abrasion failure and the height is shortened. The supporting component loss can lead to the coal-winning machine to form the slope arrangement structure at the working face, has further increased the unusual wearing and tearing of direction skid shoe on the one hand, and on the other hand, the slope is arranged and is led to the coal-winning machine to constitute at the working face and is pitched and adopt, and the coal-charging ability descends.
Disclosure of Invention
In order to solve the problems, the invention provides a height-adjustable supporting assembly of a coal mining machine, which has long service life and can improve the coal loading capacity of the coal mining machine in a down-mining state.
The main technical scheme of the invention is as follows:
the height-adjustable coal mining machine supporting assembly comprises a sliding shoe, a supporting seat assembly and a supporting leg assembly, wherein the lower portion of the supporting leg assembly is hinged to the sliding shoe through a pin shaft, and the lower portion of the supporting seat assembly is inserted into a groove in the upper portion of the supporting leg assembly to form an oil cylinder structure which stretches up and down.
The supporting leg assembly can comprise a supporting leg and a guide sleeve, a groove is formed in the top of the supporting leg, the groove comprises an upper rectangular groove and a lower circular groove, internal threads are formed in the upper portion of the circular groove, the guide sleeve is connected to the upper portion of the circular groove through external threads in a threaded manner, the supporting seat assembly can comprise a supporting seat and a piston, rod-shaped structures with a rectangular cross section and a circular cross section are respectively formed in the middle and the lower portion of the supporting seat, external threads are formed in the lower portion of the rod-shaped structure with the circular cross section, the piston is sleeved outside the lower portion of the rod-shaped structure with the circular cross section through internal threads, the piston is in up-and-down sliding fit with the lower portion of the circular groove in the circular groove and is sealed through an O-shaped ring, and the upper portion of the rod-shaped structure with the circular cross, and the piston and the guide sleeve are sealed by an O-shaped ring, the rod-shaped structure with the rectangular cross section is positioned in the rectangular groove and is in up-and-down sliding fit with the rectangular groove, and an up-and-down interval is formed between the piston and the guide sleeve when the piston moves down to the bottom limit position of the circular groove.
The piston is characterized in that two oil holes are formed in the supporting seat, one end of each oil hole is formed in the top surface of the supporting seat, the other end of each oil hole is formed in the bottom surface of the supporting seat, the other end of each oil hole is formed in the outer cylindrical surface of the rod-shaped structure with the circular cross section of the supporting seat and located above the piston, and the piston is located below the guide sleeve when moving downwards to the bottom limit position of the circular groove.
The height-adjustable coal mining machine supporting assembly can further comprise a two-way hydraulic control one-way valve, the two-way hydraulic control one-way valve is installed on the supporting seat, two oil holes are formed in the top surface of the supporting seat, the ends of the two oil holes are respectively connected with two oil outlets of the two-way hydraulic control one-way valve, and two oil inlets of the two-way hydraulic control one-way valve are connected with a pressure oil source and an oil return tank through a reversing valve.
The pressure oil source and the oil return tank are both provided by the coal mining machine system and are respectively connected with the reversing valve through an oil supply pipeline and an oil return pipeline provided by the coal mining machine system.
The stroke of the oil cylinder structure is preferably not more than 20 cm.
The piston is provided with a circular groove, the outer cylindrical surface of the piston is provided with two O-shaped ring mounting grooves at intervals up and down, O-shaped rings are mounted in the O-shaped ring mounting grooves, the piston is sealed with the lower portion of the circular groove, the inner cylindrical surface of the guide sleeve is provided with two O-shaped ring mounting grooves at intervals up and down, O-shaped rings are mounted in the O-shaped ring mounting grooves, and the upper section of a rod-shaped structure with a circular cross section is sealed with the guide sleeve.
But height-adjusting's coal-winning machine supporting component still preferably includes two overflow valves, these two overflow valves respectively with two check valves in the two-way hydraulic control check valve correspond and are connected, and concrete connection mode is: the oil inlet of each overflow valve is connected with the oil outlet of one of the two-way hydraulic control one-way valves, and the oil outlet of each overflow valve is connected with the oil inlet of the other one of the two-way hydraulic control one-way valves.
The lower portion of the leg rides over the ears of the slipper and is hinged by the pin.
The invention has the beneficial effects that:
according to the invention, the oil cylinder structure is arranged in the supporting assembly, and the height of the supporting assembly can be changed by adjusting the telescopic amount of the oil cylinder structure. When the sliding shoes are worn more, the oil cylinder structure is adjusted to extend to a corresponding height according to the wear loss measurement value of the sliding shoes, so that the height of the supporting component can be kept equal to the height of the supporting component when the sliding shoes are not worn, the coal mining machine can be kept to mine coal in parallel, the service life of the sliding shoes is prolonged, and the service life of the supporting component is prolonged.
When the coal mining machine is used for underground coal mining, the working conditions of the coal mining machine are changed more. By adopting the support assembly, when an undulating working surface, particularly a down-cut working surface exists, the influence of the down-cut working surface can be reduced or eliminated by adjusting the telescopic amount of the oil cylinder structure, so that the coal loading capacity of the coal mining machine is improved.
When the coal mining machine is used for underground coal mining, the working face coal layer has large random variability, and large vibration is easily caused when the coal mining machine is used for mining coal. By adopting the supporting assembly, the oil cylinder structure is utilized to absorb partial vibration of the coal mining machine, the service life of the coal mining machine, particularly the coal mining machine, can be prolonged, and the working reliability of the coal mining machine is improved.
Drawings
FIG. 1 is a perspective view of one embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
fig. 3 is a sectional view of the a-a step of fig. 2.
Reference numerals: 1. a pin assembly; 2. a two-way hydraulic control one-way valve; 3. a supporting seat; 4. a first O-ring; 5. a guide sleeve; 6. a second O-ring; 7. a piston; 8. a support leg; 9. a pin shaft; 10. a slipper.
Detailed Description
The invention discloses a height-adjustable coal mining machine support assembly (support assembly for short), which comprises a sliding shoe 10, a support seat assembly and a support leg assembly, wherein the lower part of the support leg assembly is hinged with the sliding shoe through a pin shaft 9, and the lower part of the support seat assembly is inserted into a groove in the upper part of the support leg assembly to form an oil cylinder structure capable of stretching up and down. The height of the supporting component can be changed by adjusting the telescopic amount of the oil cylinder structure. When the sliding shoes are worn more, the oil cylinder structure is adjusted to extend to a corresponding height according to the wear loss measurement value of the sliding shoes, so that the height of the supporting component can be kept equal to the height of the supporting component when the sliding shoes are not worn, the coal mining machine can be kept to mine coal in parallel, the service life of the sliding shoes is prolonged, and the service life of the supporting component is prolonged. When an undulating working surface exists, particularly when the working surface is used for face-down mining, the influence of the face-down mining can be reduced or eliminated by adjusting the telescopic amount of the oil cylinder structure, so that the coal charging capacity of the coal mining machine is improved. In addition, the oil cylinder structure can also absorb partial vibration of the coal mining machine, so that the service life of the coal mining machine roller is prolonged.
The leg assembly may include a leg 8 and a guide sleeve 5. The top of landing leg is equipped with the recess, the recess includes upper segment rectangle recess and the circular recess of hypomere, the upper portion of circular recess is equipped with the internal thread, the uide bushing with its external screw thread threaded connection in the upper portion in the circular recess. Both rectangular and circular are cross-sectional shapes of the corresponding position of the leg. The rectangular groove can be other polygonal grooves.
The support seat assembly may include a support seat 3 and a piston 7, and the middle and lower portions of the support seat are formed in rod-like structures having a rectangular cross section and a circular cross section, respectively. The lower section of the rod-shaped structure with the circular cross section is provided with external threads, and the piston is sleeved outside the lower section of the rod-shaped structure with the circular cross section through the internal threads.
The depth of the upper section rectangular groove is preferably smaller than the distance between the guide sleeve and the piston in the installation state.
The piston is in sliding fit with the lower part of the circular groove in the circular groove up and down, and the piston and the circular groove are sealed through an O-shaped ring. The upper section of the rod-shaped structure with the circular cross section is in up-and-down sliding fit with the guide sleeve in the guide sleeve, and the upper section and the guide sleeve are sealed through an O-shaped ring. And the rod-shaped structure with the rectangular cross section is positioned in the rectangular groove and is in up-and-down sliding fit with the rectangular groove. The space below the guide sleeve in the circular groove forms an oil cylinder inner cavity of the oil cylinder structure, and the piston slides up and down in the oil cylinder inner cavity under the driving of the supporting seat. The inner cavities of the oil cylinder above and below the piston are respectively an upper cavity and a lower cavity. When the piston moves downwards to the bottom limit position of the circular groove, an upper-lower interval exists between the piston and the guide sleeve, and an oil cylinder inner cavity corresponding to the interval is a cavity when the upper cavity is at the maximum.
During assembly, the guide sleeve 5 can be firstly sleeved on the rod-shaped structure with the circular cross section of the support seat 3, then the piston 7 is screwed on the lower section of the rod-shaped structure with the circular cross section of the support seat 3, then the rod-shaped structure part with the circular cross section of the support seat 3 with the guide sleeve 5 and the piston 7 is inserted into the circular groove of the support leg 8, and meanwhile, the support seat 3 is rotated, so that the guide sleeve is in threaded connection with the support leg.
The leg 8 may be made into a split structure, for example, including a leg main body and four side plates, the four side plates are fixedly mounted on the top surface of the leg main body, and form a rectangle from four sides to form the upper rectangular groove. In this case, the piston 7 may be placed at the bottom of the circular groove of the leg, the guide sleeve 5 may be screwed onto the upper portion of the circular groove of the leg, the support base 3 may be inserted and rotated, the piston 7 may be screwed to the lower portion of the rod-like structure having a circular cross section of the support base 3, and finally the four side plates may be installed. Or, the guide sleeve 5 can be firstly sleeved on the upper section of the rod-shaped structure with the circular cross section of the support seat 3, then the piston 7 is screwed on the lower section of the rod-shaped structure with the circular cross section of the support seat 3, the support seat 3 with the guide sleeve 5 and the piston 7 is inserted into the circular groove of the support leg 8, meanwhile, the support seat 3 is rotated, the guide sleeve 5 is in threaded connection with the circular groove of the upper section of the support leg 8, and finally four side plates are installed.
In the embodiment shown in the drawing, two oil holes are arranged in the supporting seat, one end of each oil hole is arranged on the top surface of the supporting seat, the other end of each oil hole is arranged on the bottom surface of the supporting seat, and the other end of each oil hole is arranged on the outer cylindrical surface of the rod-shaped structure with the circular cross section of the supporting seat, is positioned above the piston and is positioned below the guide sleeve when the piston moves downwards to the bottom limit position of the circular groove. Through the alternate oil feeding and oil returning of the two oil holes, the oil cylinder structure can stretch up and down freely, and the height of the supporting assembly is adjusted.
Further, the end of the oil hole opened on the outer cylindrical surface of the rod-like structure of the circular cross section of the support seat is preferably located immediately above the top surface of the piston.
The height-adjustable coal mining machine supporting assembly can further comprise a two-way hydraulic control one-way valve 2, the two-way hydraulic control one-way valve can be mounted on the top surface of the middle part of the supporting seat, two oil holes are formed in the top surface of the supporting seat, the ends of the two oil holes are respectively connected with two oil outlets of the two-way hydraulic control one-way valve, and two oil inlets of the two-way hydraulic control one-way valve are connected with a pressure oil source and an oil return tank through a reversing valve. Through the reversing operation of the reversing valve, two check valves in the two-way hydraulic control check valve alternately feed oil, so that the two oil holes alternately feed oil and return oil. The reversing valve is a three-position four-way reversing valve, and when the reversing valve is switched to a middle position, the oil cylinder structure can stay at any position in a stroke.
The pressure oil source and the oil return tank are both provided by the coal mining machine system and are respectively connected with the P port and the O port of the reversing valve through an oil supply pipeline and an oil return pipeline of the coal mining machine system, so that the configuration of a hydraulic station is saved, and the centralized control of the valves is facilitated.
The stroke of the oil cylinder structure is preferably not more than 20 cm.
Two O-shaped ring mounting grooves can be formed in the outer cylindrical surface of the piston at intervals up and down, and a second O-shaped ring 6 is mounted in the O-shaped ring mounting grooves so as to seal between the piston and the lower portion of the circular groove. Two O-shaped ring mounting grooves can be formed in the inner cylindrical surface of the guide sleeve at intervals up and down, and a first O-shaped ring 4 is mounted in each O-shaped ring mounting groove so as to seal the upper section of the rod-shaped structure with the circular cross section and the guide sleeve.
But height-adjusting's coal-winning machine supporting component still preferably includes two overflow valves, respectively with two check valves among the two-way hydraulic control check valve correspond and are connected, and concrete connection mode is: the oil inlet of each overflow valve is connected with the oil outlet of one of the two-way hydraulic control one-way valves, and the oil outlet of each overflow valve is connected with the oil inlet of the other one of the two-way hydraulic control one-way valves. The overflow valve can be integrally installed with the bidirectional hydraulic control one-way valve. The overflow valve is arranged, so that the oil cylinder structure can bear common impact of the coal mining machine, and the oil cylinder structure can be unloaded through the overflow valve when the impact exceeds the set pressure of the overflow valve, so that the rigid vibration of the coal mining machine is reduced.
In this embodiment, the lower part of the leg is configured as a downward opening through slot, and the leg rides on the ear of the slipper through the through slot and is hinged by the pin 9, so as to realize the hinge joint of the leg assembly and the slipper.
And the left part and the right part of the upper part of the supporting seat are respectively provided with a pin shaft assembly 1 which is used for connecting the supporting seat with the body of the coal mining machine.
Claims (10)
1. The utility model provides a but height-adjusting's coal-winning machine supporting component, includes skid shoe, its characterized in that: the lower part of the supporting leg assembly is hinged with the sliding shoe through a pin shaft, and the lower part of the supporting leg assembly is inserted into a groove in the upper part of the supporting leg assembly to form an oil cylinder structure which stretches up and down.
2. The height-adjustable shearer support assembly of claim 1, wherein: the supporting leg assembly comprises a supporting leg and a guide sleeve, a groove is formed in the top of the supporting leg, the groove comprises an upper rectangular groove and a lower circular groove, internal threads are formed in the upper portion of the circular groove, the guide sleeve is connected to the upper portion of the circular groove through external threads in a threaded manner, the supporting seat assembly comprises a supporting seat and a piston, rod-shaped structures with rectangular cross sections and circular cross sections are respectively formed in the middle and the lower portion of the supporting seat, external threads are formed in the lower portion of the rod-shaped structure with the circular cross sections, the piston is sleeved outside the lower portion of the rod-shaped structure with the circular cross sections through internal threads, the piston is in up-and-down sliding fit with the lower portion of the circular groove in the circular groove and is sealed through an O-shaped ring, and the upper portion of the rod-shaped structure with the circular cross sections is, and the piston and the guide sleeve are sealed by an O-shaped ring, the rod-shaped structure with the rectangular cross section is positioned in the rectangular groove and is in up-and-down sliding fit with the rectangular groove, and an up-and-down interval is formed between the piston and the guide sleeve when the piston moves down to the bottom limit position of the circular groove.
3. The height-adjustable shearer support assembly of claim 2, wherein: the piston is characterized in that two oil holes are formed in the supporting seat, one end of each oil hole is formed in the top surface of the supporting seat, the other end of each oil hole is formed in the bottom surface of the supporting seat, the other end of each oil hole is formed in the outer cylindrical surface of the rod-shaped structure with the circular cross section of the supporting seat and located above the piston, and the piston is located below the guide sleeve when moving downwards to the bottom limit position of the circular groove.
4. The height-adjustable shearer support assembly of claim 3, wherein: the end of the oil hole which is arranged on the outer cylindrical surface of the rod-shaped structure with the circular cross section of the supporting seat is positioned above the top surface of the adjacent piston.
5. The height-adjustable shearer support assembly of claim 4, wherein: the oil-return device is characterized by further comprising a two-way hydraulic control one-way valve, wherein the two-way hydraulic control one-way valve is installed on the supporting seat, two oil holes are formed in the top surface of the supporting seat, the ends of the two oil holes are respectively connected with two oil outlets of the two-way hydraulic control one-way valve, and two oil inlets of the two-way hydraulic control one-way valve are connected with a pressure oil source and an oil return tank through a reversing valve.
6. The height-adjustable shearer support assembly of claim 5, wherein: the pressure oil source and the oil return tank are both provided by the coal mining machine system and are respectively connected with the reversing valve through an oil supply pipeline and an oil return pipeline provided by the coal mining machine system.
7. The height-adjustable shearer support assembly of claim 5, wherein: the stroke of the oil cylinder structure is not more than 20 cm.
8. The height-adjustable shearer support assembly of claim 5, wherein: the piston is provided with a circular groove, the outer cylindrical surface of the piston is provided with two O-shaped ring mounting grooves at intervals up and down, O-shaped rings are mounted in the O-shaped ring mounting grooves, the piston is sealed with the lower portion of the circular groove, the inner cylindrical surface of the guide sleeve is provided with two O-shaped ring mounting grooves at intervals up and down, O-shaped rings are mounted in the O-shaped ring mounting grooves, and the upper section of a rod-shaped structure with a circular cross section is sealed with the guide sleeve.
9. The adjustable height shearer support assembly of claim 1, 2, 3, 4, 5, 6, 7, or 8, wherein: still include two overflow valves, respectively with two check valves in the two-way liquid accuse check valve correspond and are connected, and concrete connection mode is: the oil inlet of each overflow valve is connected with the oil outlet of one of the two-way hydraulic control one-way valves, and the oil outlet of each overflow valve is connected with the oil inlet of the other one of the two-way hydraulic control one-way valves.
10. The adjustable height shearer support assembly of claim 9, wherein: the lower portion of the leg rides over the ears of the slipper and is hinged by the pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911144133.5A CN110761790A (en) | 2019-11-21 | 2019-11-21 | Coal mining machine supporting assembly with adjustable height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911144133.5A CN110761790A (en) | 2019-11-21 | 2019-11-21 | Coal mining machine supporting assembly with adjustable height |
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| Publication Number | Publication Date |
|---|---|
| CN110761790A true CN110761790A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911144133.5A Pending CN110761790A (en) | 2019-11-21 | 2019-11-21 | Coal mining machine supporting assembly with adjustable height |
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| CN (1) | CN110761790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350925A (en) * | 2020-04-18 | 2020-06-30 | 天地科技股份有限公司上海分公司 | Height-adjustable coal mining machine supporting mechanism and coal mining machine supporting height adjusting method |
-
2019
- 2019-11-21 CN CN201911144133.5A patent/CN110761790A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350925A (en) * | 2020-04-18 | 2020-06-30 | 天地科技股份有限公司上海分公司 | Height-adjustable coal mining machine supporting mechanism and coal mining machine supporting height adjusting method |
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