CN210829316U - Strong energy-absorbing hydraulic support pillar with rock burst resistance function - Google Patents
Strong energy-absorbing hydraulic support pillar with rock burst resistance function Download PDFInfo
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- CN210829316U CN210829316U CN201921804143.2U CN201921804143U CN210829316U CN 210829316 U CN210829316 U CN 210829316U CN 201921804143 U CN201921804143 U CN 201921804143U CN 210829316 U CN210829316 U CN 210829316U
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Abstract
The utility model relates to a powerful energy-absorbing hydraulic support pillar with resist rock burst, including master cylinder and powerful energy release jar, master cylinder and powerful energy release jar pass through coupling mechanism and connect, coupling mechanism includes the energy release piston rod and with the energy release piston that the energy release piston rod is connected, the energy release piston is located powerful energy release jar and closely cooperates with the inner wall of powerful energy release jar; an oil inlet for high-pressure oil in the strong energy release cylinder to enter is arranged on the energy release piston, an oil guide channel communicated with the oil inlet is arranged on the energy release piston rod, and the oil guide channel is connected with a strong pressure release valve. When the main oil cylinder safety valve is under strong ground pressure impact, the flow rate of the main oil cylinder safety valve is small and is not enough to release the instantly increased internal pressure, the strong pressure release valve is opened quickly, high-pressure oil in the strong energy release cylinder is discharged quickly through the large-caliber strong pressure release valve and the oil guide channel, the progressive damper is closed gradually along with the contraction of the strong energy release cylinder, the resistance of the support column is increased gradually, and the rated working resistance is recovered.
Description
Technical Field
The utility model relates to a colliery safety support technical field especially relates to a powerful energy-absorbing hydraulic support pillar with resist rock burst.
Background
The hydraulic upright post has extremely strong supporting capability and a function of self-regulating and controlling load, so that the hydraulic upright post is widely applied to current coal mine support, is commonly used in heavy support equipment such as fully mechanized hydraulic supports, stack supports and self-moving hydraulic supports, and is also used by part of single hydraulic upright posts. The hydraulic upright post is simple in structural form and simple and convenient in operation method, high initial supporting force can be achieved only through external liquid injection, the safety valve is immediately opened to drain liquid and release pressure when external load exceeds a threshold value set by the hydraulic upright post, and the safety valve is automatically closed when the load is reduced to be within the threshold value, so that the function of self-regulation and control of the load is achieved. Therefore, the hydraulic upright post has extremely strong adaptability under complex and severe coal mine support conditions, and plays an important role in coal mine support.
The opening time of the safety valve and the liquid discharge and pressure release speed of the hydraulic upright are fixed, and when sudden mine earthquake, rock burst or fracture of a top plate occurs in the mining process, the impact effect of surrounding rocks on the hydraulic upright in a roadway or a working face is very short, so that the situation that the safety valve is not opened yet and is damaged instantly by huge impact force, even a cylinder is exploded, a sealing ring is crushed, a strut is bent unstably and the like, and further the support failure of the whole support or a support system is caused.
In order to make up the defect that the existing hydraulic upright column is weak in impact resistance, a hydraulic upright column with energy absorption and impact resistance is urgently needed to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a powerful energy-absorbing hydraulic support pillar for with resist rock burst, replace the master cylinder to bear powerful fast-speed ground pressure impact force through the cooperation of powerful energy release jar, energy release piston rod, energy release piston and powerful pressure release valve, avoided exploding jar, sealing washer crushing, pillar unstability and bend the scheduling problem.
The utility model is realized by the following technical scheme, a strong energy-absorbing hydraulic support pillar with resistance to rock burst is provided, including master cylinder and strong energy release cylinder, master cylinder and strong energy release cylinder pass through coupling mechanism to be connected, coupling mechanism includes energy release piston rod and the energy release piston of being connected with the energy release piston rod, and the energy release piston rod is with the one end rigid coupling of master cylinder, and the energy release piston is located strong energy release cylinder and closely cooperates with the inner wall of strong energy release cylinder, and upper end cover and lower end cover are connected respectively to the both ends of strong energy release cylinder; an oil inlet for high-pressure oil in the strong energy release cylinder to enter is arranged on the energy release piston, an oil guide channel communicated with the oil inlet is arranged on the energy release piston rod, and the oil guide channel is connected with a strong pressure release valve.
Preferably, the powerful pressure release valve comprises a placing groove arranged on the energy release piston rod, the placing groove is communicated with the oil guide channel, a safety valve block used for sealing the oil guide channel is placed at the joint of the placing groove and the oil guide channel, the safety valve block is fixed through a pressing sleeve, the pressing sleeve is fixed through a screw cap in threaded connection with the placing groove, an oil drainage channel is arranged in the pressing sleeve, and an oil drainage hole communicated with the oil drainage channel is formed in the screw cap.
Preferably, a progressive damper matched with the oil inlet is arranged in the strong energy release cylinder, and the progressive damper is connected with the lower end cover.
Preferably, the master cylinder comprises a master piston, a master piston rod, an oil inlet, an oil outlet and a master cylinder safety valve.
Preferably, the master cylinder safety valve is connected with an outer pipeline arranged outside the master cylinder, and the outer pipeline is connected with an inner cavity of the master cylinder through an inner pipeline arranged inside the energy release piston rod.
The utility model has the advantages that:
1. the main oil cylinder is replaced by the cooperation of the strong energy release cylinder, the energy release piston rod, the energy release piston and the strong pressure release valve to bear strong high-speed ground pressure impact force, when the set pressure of a safety valve of the main oil cylinder is reached, a safety valve plate in the strong pressure release valve bursts and opens, and high-pressure liquid can be quickly released due to the large opening section of the opened strong pressure release valve, a support column rapidly moves away, and the impact energy of a top plate is absorbed.
2. Through the rapid unloading of the powerful pressure relief valve and the throttling energy absorption of the progressive damper, the powerful impact pressure of the base plate is absorbed and converted into heat energy to be discharged, so that the support and the pillar are prevented from being damaged, a roadway cannot collapse, and the safety of personnel is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
shown in the figure:
1. the main oil cylinder, 2, main piston, 3, main piston rod, 4, main oil cylinder safety valve, 5, outer pipeline, 6, inner pipeline, 7, release can the piston rod, 8, upper end cover, 9, release can the piston, 10, the oil inlet, 11, lead oil passageway, 12, standing groove, 13, safety valve block, 14, pressure cover, 15, spiral shell lid, 16, powerful release can the jar, 17, progressive attenuator, 18, draining passageway, 19, draining hole, 21, lower end cover.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 1, the utility model discloses a master cylinder 1 and powerful energy release jar 16, master cylinder 1 and powerful energy release jar 16 pass through coupling mechanism and connect, coupling mechanism is including releasing energy piston rod 7 and the energy release piston 9 of being connected with energy release piston rod 7, the one end rigid coupling of energy release piston rod 7 and master cylinder 1, energy release piston 9 is located powerful energy release jar 16 and closely cooperates with the inner wall of powerful energy release jar 16, and upper end cover 8 and lower end cover 21 are connected respectively to powerful energy release jar 16's both ends. An oil inlet 10 for high-pressure oil in the strong energy releasing cylinder 16 to enter is arranged on the energy releasing piston 9, an oil guide channel 11 communicated with the oil inlet 10 is arranged on the energy releasing piston rod 7, and the oil guide channel 11 is connected with a strong pressure releasing valve.
In this embodiment, as shown in fig. 2, the strong pressure relief valve includes a placement groove 12 disposed on the energy release piston rod 7, the placement groove 12 is communicated with the oil guide channel 11, a safety valve sheet 13 for sealing the oil guide channel 11 is disposed at a joint of the placement groove 12 and the oil guide channel 11, the safety valve sheet 13 is fixed by a pressure sleeve 14, the pressure sleeve 14 is fixed by a screw cap 15 in threaded connection with the placement groove 12, an oil drainage channel 18 is disposed in the pressure sleeve 14, and an oil drainage hole 19 communicated with the oil drainage channel 18 is disposed on the screw cap 15. When the oil pressure in the oil guide channel 11 exceeds the compression strength of the safety valve plate 13, the oil pressure breaks the safety valve plate 13, high-pressure oil rapidly leaks from the oil drain hole 19 through the oil drain channel 18, the strut rapidly moves away, and impact energy is absorbed. In this embodiment, the safety valve plate 13 is made of copper.
In the present embodiment, a progressive damper 17 is provided in the high power release cylinder 16 to be engaged with the oil inlet 10, and the progressive damper 17 is connected to the lower end cover 21. In the present embodiment, the progressive damper 17 has a tapered structure. The progressive damper has the following functions: after the energy release piston rod 7 descends to give way for a certain distance, the progressive damper 17 and the oil inlet 10 gradually approach and are gradually inserted into the oil inlet 10, in the process, the overflowing section of high-pressure oil passing through the oil inlet 10 is gradually reduced until the energy absorption stroke is finished, and the energy release piston rod 7 is prevented from descending at a high speed to form severe impact on the lower end cover 21.
In the embodiment, the master cylinder 1 adopts an existing structure, and the master cylinder 1 comprises a master piston 2, a master piston rod 3, an oil inlet, an oil outlet and a master cylinder safety valve 4. In this embodiment, the master cylinder safety valve 4 is connected to an outer conduit 5 disposed outside the master cylinder 1, and the outer conduit 5 is connected to the inner cavity of the master cylinder 1 via an inner conduit 6 disposed inside the energy release piston rod 7.
The working principle of the application is as follows: when the upright column bears static pressure and low-speed dynamic pressure, if the pressure does not exceed the set pressure of the main oil cylinder safety valve 4, the main oil cylinder safety valve 4 plays a role, so that the support column is slowly released and abducted; when the main oil cylinder safety valve 4 is impacted by strong high-speed ground pressure, the pressure of the inside of the support is rapidly increased due to the fact that the flow is small, the safety valve plate 13 in the strong pressure relief valve is burst and opened when the set pressure of the main oil cylinder safety valve 4 is reached, high-pressure liquid can be rapidly released due to the fact that the opening section of the opened strong pressure relief valve is large, the support is rapidly abduced to absorb impact energy of a top plate, after the support is abduced for a certain distance, the overflowing section of the progressive damper is gradually reduced due to the adoption of the conical structure until the energy absorption stroke is finished, the impact energy is gradually absorbed, the situation that the energy release piston 9 descends at high speed to form severe impact on the lower end cover 21 is avoided, and then the main oil cylinder safety valve 4 releases residual energy until.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides a powerful energy-absorbing pillar for hydraulic support with resist rock burst which characterized in that: the energy-releasing device comprises a main oil cylinder (1) and a strong energy-releasing cylinder (16), wherein the main oil cylinder (1) and the strong energy-releasing cylinder (16) are connected through a connecting mechanism, the connecting mechanism comprises an energy-releasing piston rod (7) and an energy-releasing piston (9) connected with the energy-releasing piston rod (7), the energy-releasing piston rod (7) is fixedly connected with one end of the main oil cylinder (1), the energy-releasing piston (9) is positioned in the strong energy-releasing cylinder (16) and is tightly matched with the inner wall of the strong energy-releasing cylinder (16), and two ends of the strong energy-releasing cylinder (16) are respectively connected with an upper end cover (8) and a lower end cover (21); an oil inlet (10) for high-pressure oil in the high-power energy release cylinder (16) to enter is arranged on the energy release piston (9), an oil guide channel (11) communicated with the oil inlet (10) is arranged on the energy release piston rod (7), and the oil guide channel (11) is connected with a high-power pressure release valve.
2. The strut for a high-power energy-absorbing hydraulic bracket with resistance to rock burst as claimed in claim 1, wherein: powerful pressure release valve is including setting up standing groove (12) on releasing can piston rod (7), standing groove (12) and oil guide channel (11) intercommunication, place safety valve block (13) that are used for sealed oil guide channel (11) in standing groove (12) and oil guide channel's (11) junction, safety valve block (13) are fixed through pressure cover (14), it is fixed that pressure cover (14) are through spiral shell lid (15) with standing groove (12) threaded connection, be equipped with in pressure cover (14) draining passageway (18), be equipped with drain hole (19) with draining passageway (18) intercommunication on spiral shell lid (15).
3. The strut for a high-power energy-absorbing hydraulic bracket with resistance to rock burst as claimed in claim 1, wherein: a progressive damper (17) matched with the oil inlet (10) is arranged in the strong energy releasing cylinder (16), and the progressive damper (17) is connected with the lower end cover (21).
4. The strut for a high-power energy-absorbing hydraulic bracket with resistance to rock burst as claimed in claim 1, wherein: the main oil cylinder (1) comprises a main piston (2), a main piston rod (3), an oil inlet, an oil outlet and a main oil cylinder safety valve (4).
5. The strut for a high-power energy-absorbing hydraulic bracket with resistance to rock burst as claimed in claim 4, wherein: the main oil cylinder safety valve (4) is connected with an outer pipeline (5) arranged outside the main oil cylinder (1), and the outer pipeline (5) is connected with the inner cavity of the main oil cylinder (1) through an inner pipeline (6) arranged inside the energy release piston rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921804143.2U CN210829316U (en) | 2019-10-25 | 2019-10-25 | Strong energy-absorbing hydraulic support pillar with rock burst resistance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921804143.2U CN210829316U (en) | 2019-10-25 | 2019-10-25 | Strong energy-absorbing hydraulic support pillar with rock burst resistance function |
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| Publication Number | Publication Date |
|---|---|
| CN210829316U true CN210829316U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921804143.2U Active CN210829316U (en) | 2019-10-25 | 2019-10-25 | Strong energy-absorbing hydraulic support pillar with rock burst resistance function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530579A (en) * | 2021-08-25 | 2021-10-22 | 中煤北京煤矿机械有限责任公司 | Hydraulic support stand is with buffering energy-absorbing mechanism convenient to replacement |
-
2019
- 2019-10-25 CN CN201921804143.2U patent/CN210829316U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530579A (en) * | 2021-08-25 | 2021-10-22 | 中煤北京煤矿机械有限责任公司 | Hydraulic support stand is with buffering energy-absorbing mechanism convenient to replacement |
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