CN218716870U - Three flexible stands of degradable high reliability - Google Patents
Three flexible stands of degradable high reliability Download PDFInfo
- Publication number
- CN218716870U CN218716870U CN202222197208.XU CN202222197208U CN218716870U CN 218716870 U CN218716870 U CN 218716870U CN 202222197208 U CN202222197208 U CN 202222197208U CN 218716870 U CN218716870 U CN 218716870U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- stage cylinder
- liquid
- pressure
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Actuator (AREA)
Abstract
The utility model provides a three telescopic stand columns with high pressure reduction and high reliability, which comprises a first-stage cylinder body, wherein a second-stage cylinder body is arranged inside the first-stage cylinder body, a third-stage cylinder body is arranged inside the second-stage cylinder body, movable columns are arranged on two sides inside the third-stage cylinder body, a pressure reduction rod is arranged between two groups of corresponding movable columns, guide sleeves are arranged on two sides between the movable columns and the pressure reduction rod, and a fixing screw is arranged at one end of the pressure reduction rod; pistons are arranged at two sides of the other end of the plunger, a third-stage cylinder opening guide sleeve assembly is arranged at one end inside the third-stage cylinder body, a second-stage cylinder opening guide sleeve assembly is arranged at one end inside the second-stage cylinder body, a first-stage cylinder opening guide sleeve assembly is arranged at one end inside the first-stage cylinder body, and a boss capable of being communicated with liquid is arranged on the cylinder bottom of the second-stage cylinder body; the bottom valve of the third-stage cylinder body is arranged in the middle; a fixing screw is arranged on the bottom of the third-stage cylinder body; fixing a pressure reducing rod on the bottom of the three-stage cylinder body; the screw hole of the fixing screw is drilled through and is superior to the blind screw hole.
Description
Technical Field
The utility model relates to a three flexible stands of degradable high reliability for big concertina ratio hydraulic support belongs to coal mining and struts technical field.
Background
At present, the hydraulic support upright post for supporting the coal mining working face mainly has three forms: single flexible stand, single flexible extension bar stand, two flexible stands of adding machinery. The double telescopic columns have large telescopic ratio, and can meet the requirements of most coal mines. But the coal seam of few mining areas has the thickness frequent change, especially when needing to cross the fault, requires that the lift range of hydraulic support stand is bigger, the reliability is higher. The existing double-telescopic upright column needs to increase the forward inclination angle of the upright column in order to meet the requirement of large telescopic ratio of the hydraulic support, so that the stress of a hydraulic support part is increased, and the supporting efficiency is reduced. Even so, the two flexible stands of some special coal seams also can't satisfy highest, minimum requirement, must use three flexible stands.
When the three telescopic upright columns are designed according to the rated working resistance, the pressure bearing in the three-stage cylinder is overhigh. The pressure bearing in the three-stage cylinder is too high, and the following three conditions can be caused: (1) when the upright column normally bears, the pressure difference between the three-stage cylinder and the two-stage cylinder exceeds the reverse opening pressure of the bottom valve, so that the bottom valve is reversely opened, the supporting force provided by the upright column cannot reach the rated working resistance, and the plunger retracts. (2) When the upright column normally bears, the sealing bearing pressure of the piston of the three-stage cylinder exceeds the bearing limit, the supporting force provided by the upright column cannot reach the rated working resistance, and the plunger retracts. (3) When the upright column normally bears the load, the stress borne by the three-level cylinder barrel exceeds the yield limit of the material, the cylinder barrel expands to generate plastic deformation and even explode, and the safety of a working face is seriously affected.
Therefore, there is a need to provide a three telescopic column with high pressure reduction and reliability to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
1. The utility model discloses a set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body for the bottom valve of tertiary cylinder body arranges between two parties, reduces the manufacturing degree of difficulty.
2. The utility model discloses a set up set screw on the cylinder bottom of tertiary cylinder body, fix the buck pole on the cylinder bottom of tertiary cylinder body, can reduce the high pressure in the tertiary cylinder by 30%, improve the reliability of three flexible stands.
For solving the technical problem, the utility model provides a pair of three flexible stands of degradable high reliability, including the one-level cylinder body, the inside second grade cylinder body that is provided with of one-level cylinder body, the inside tertiary cylinder body that is provided with of second grade cylinder body, tertiary cylinder body inside has the post of living, and the post inner chamber of living is provided with the depression bar, the depression bar is provided with piston and uide bushing, depression bar one end department is provided with the screw hole for set screw.
The inside one end department of tertiary cylinder body is provided with tertiary jar mouth uide bushing subassembly, the inside one end department of secondary cylinder body is provided with second grade jar mouth uide bushing subassembly, the inside one end department of one-level cylinder body is provided with one-level jar mouth uide bushing group.
Preferably, a lower cavity liquid inlet is formed in the lower end of the first-stage cylinder body and used for injecting high-pressure liquid.
Preferably, the upper end of the first-stage cylinder body is provided with an upper cavity liquid inlet, and the upper cavity liquid inlet is used for injecting high-pressure liquid.
Preferably, one end of the secondary cylinder body is provided with a bottom valve, and high-pressure liquid passes through a liquid through hole formed in the secondary cylinder body, so that the tertiary cylinder body descends to the lowest position.
Preferably, a boss capable of being communicated with liquid is arranged at the bottom of the secondary cylinder body, so that a bottom valve of the tertiary cylinder body is opened, and high-pressure liquid passes through a liquid communication hole formed in the tertiary cylinder body, and the plunger is lowered to a required height.
Preferably, a boss capable of being communicated with liquid is arranged on the bottom of the second-stage cylinder body, a bottom valve of the third-stage cylinder body is arranged in the middle, the pressure reducing rod is fixed on the bottom of the third-stage cylinder body, and a threaded hole of the pressure reducing rod is drilled through and is superior to a blind threaded hole.
Compared with the prior art, the utility model provides a three flexible stands of degradable high reliability have following beneficial effect:
the utility model provides a three flexible stands of degradable high reliability. High-pressure liquid is injected through a liquid inlet of a lower cavity of the first-stage cylinder body, so that the upright column rises to an effective height to achieve initial supporting force. When the top plate is pressed, the lower cavity section of the plunger, the pressure reducing rod, the piston and the cavity section below the plunger head simultaneously bear pressure, so that the pressure bearing area is increased, and the pressure of the three-stage cavity is reduced. High-pressure liquid is injected through a liquid inlet of the upper cavity of the one-level cylinder body, the secondary cylinder body descends, when the secondary cylinder body reaches the lowest position, a bottom valve of the secondary cylinder body is opened, the high-pressure liquid passes through a liquid through hole formed in the secondary cylinder body, the tertiary cylinder body descends, when the lowest position is reached, a boss capable of passing through liquid is arranged on the bottom of the secondary cylinder body, the bottom valve of the tertiary cylinder body is opened, the high-pressure liquid passes through the liquid through hole formed in the tertiary cylinder body, and the movable column descends to a required height.
a. A boss capable of being filled with liquid is arranged at the bottom of the secondary cylinder body; b. the bottom valve of the third-stage cylinder body is arranged in the middle; c. a fixing screw is arranged on the bottom of the third-stage cylinder body, and the pressure reducing rod is fixed on the bottom of the third-stage cylinder body; d. the screw hole of the fixing screw is drilled through and is superior to the blind screw hole.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of a depressible high reliability three telescopic column provided by the present invention;
fig. 2 is a schematic plan view of the back structure shown in fig. 1.
Fig. 3 is a schematic view of the screw hole of the fixing screw shown in fig. 1 and 2 drilled through.
The reference numbers in the figures: 1. a primary cylinder body; 2. a secondary cylinder body; 3. a third-stage cylinder body; 4. a plunger; 5. a pressure reducing rod; 6. a piston; 7. a guide sleeve; 8. a set screw; 9. a secondary cylinder port guide sleeve assembly; 10. a tertiary cylinder port guide sleeve assembly; 11. the first-stage cylinder opening guide sleeve assembly.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a three telescopic columns for reducing voltage and improving reliability according to the present invention; fig. 2 is a schematic plan view of the back structure shown in fig. 1. Three telescopic stand columns of degradable high reliability, including one-level cylinder body 1, 1 inside second grade cylinder body 2 that is provided with of one-level cylinder body, 2 inside tertiary cylinder bodies 3 that are provided with of second grade cylinder body, 3 inside pillars 4 that all are provided with of tertiary cylinder body, the inside depression bar 5 that is provided with of pillar 4, be provided with piston 6, uide bushing 7 between pillar 4 and the depression bar 5, 5 one end departments of depression bar are provided with set screw 8.
The three-stage cylinder body 3 is characterized in that a three-stage cylinder opening guide sleeve assembly 10 is arranged at one end inside the three-stage cylinder body 3, a two-stage cylinder opening guide sleeve assembly 9 is arranged at one end inside the two-stage cylinder body 2, and a one-stage cylinder opening guide sleeve assembly 11 is arranged at one end inside the one-stage cylinder body 1.
A lower cavity liquid inlet is formed in the lower end of the first-stage cylinder body 1 and is used for injecting high-pressure liquid.
An upper cavity liquid inlet is formed in the upper end of the first-stage cylinder body 1 and used for injecting high-pressure liquid.
And a bottom valve is arranged at one end of the secondary cylinder body 2, and high-pressure liquid passes through a liquid through hole arranged in the secondary cylinder body 2, so that the tertiary cylinder body 3 descends to the lowest position.
The bottom of the secondary cylinder body 2 is provided with a boss which can be communicated with liquid, so that the bottom valve of the tertiary cylinder body 3 is opened, and high-pressure liquid passes through a liquid communication hole arranged in the tertiary cylinder body 3, so that the plunger 4 is descended to the required height.
The cylinder bottom of the second-stage cylinder body 2 is provided with a boss capable of being communicated with liquid, a bottom valve of the third-stage cylinder body 3 is arranged in the middle, the pressure reducing rod 5 is fixed on the cylinder bottom of the third-stage cylinder body 3, and a threaded hole of the fixing screw 8 is drilled through and is superior to a blind threaded hole.
High-pressure liquid is injected through a liquid inlet of a lower cavity of the first-stage cylinder body 1, so that the upright column rises to an effective height to achieve initial supporting force. When the top plate is pressed, the lower cavity section of the plunger 4, the pressure reducing rod 5, the piston 6 and the cavity section below the head of the plunger 4 bear pressure simultaneously, so that the pressure bearing area is increased, and the pressure of the three-stage cavity is reduced. Inject high-pressure liquid through 1 epicoele inlet of one-level cylinder body, 2 descends of second grade cylinder body, when to the extreme low position, 2 bottom valves of second grade cylinder body are opened, high-pressure liquid is through setting up the through liquid hole in second grade cylinder body 2, make tertiary cylinder body 3 descend, when to the extreme low position, through set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body 2, make the bottom valve of tertiary cylinder body 3 open, high-pressure liquid is through setting up the through liquid hole in tertiary cylinder body 3, make the loose column 4 descend to needs height.
a. A boss which can be communicated with liquid is arranged at the bottom of the secondary cylinder body 2; b. the bottom valve of the third-stage cylinder body 3 is arranged in the middle; c. a fixing screw 8 is arranged on the bottom of the third-stage cylinder body 3, and the pressure reducing rod 5 is fixed on the bottom of the third-stage cylinder body 3; d. the threaded hole of the fixing screw 8 is drilled through and is superior to a blind threaded hole.
The utility model discloses to the implementation that the big concertina ratio hydraulic support of special coal seam exploitation strutted, provide reliable technical support to have good economic value:
1. the utility model discloses a set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body 2 for the bottom valve of tertiary cylinder body 3 is arranged between two parties, reduces the manufacturing degree of difficulty.
2. The utility model discloses a set up set screw 8 on the cylinder bottom of tertiary cylinder body 3, fix depression bar 5 on the cylinder bottom of tertiary cylinder body 3, can reduce the high pressure in the tertiary cylinder by 30%, improve the reliability of three flexible stands.
The utility model provides a operating principle of three flexible stands of degradable high reliability is as follows:
high-pressure liquid is injected through a liquid inlet of a lower cavity of the first-stage cylinder body 1, so that the stand column rises to an effective height to achieve the setting force. When the top plate is pressed, the lower cavity section of the plunger 4, the pressure reducing rod 5, the piston 6 and the cavity section below the head of the plunger 4 bear pressure simultaneously, so that the pressure bearing area is increased, and the pressure of the three-stage cavity is reduced. b. Inject high-pressure liquid through 1 epicoele inlet of one-level cylinder body, 2 descends of second grade cylinder body, when to the extreme low position, 2 bottom valves of second grade cylinder body are opened, high-pressure liquid is through setting up the through liquid hole in second grade cylinder body 2, make tertiary cylinder body 3 descend, when to the extreme low position, through set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body 2, make the bottom valve of tertiary cylinder body 3 open, high-pressure liquid is through setting up the through liquid hole in tertiary cylinder body 3, make the loose column 4 descend to needs height.
a. A boss which can be communicated with liquid is arranged at the bottom of the secondary cylinder body 2; b. the bottom valve of the third-stage cylinder body 3 is arranged in the middle; c. a fixing screw is arranged on the bottom of the third-stage cylinder body 3, and the pressure reducing rod 5 is fixed on the bottom of the third-stage cylinder body 3; d. the threaded hole of the fixing screw 8 is drilled through and is superior to a blind threaded hole.
The utility model discloses to the implementation that the big concertina ratio hydraulic support of special coal seam exploitation strutted, provide reliable technical support to have good economic value:
1. the utility model discloses a set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body 2 for the bottom valve of tertiary cylinder body 3 is arranged between two parties, reduces the manufacturing degree of difficulty.
2. The utility model discloses a set up set screw 8 on the cylinder bottom of tertiary cylinder body 3, fix depression bar 5 on the cylinder bottom of tertiary cylinder body 3, can reduce the high pressure in the tertiary cylinder by 30%, improve three flexible stand's reliability.
Compared with the prior art, the utility model provides a three flexible stands of degradable high reliability have following beneficial effect:
1. the utility model discloses a set up the boss that can lead to liquid on the cylinder bottom of second grade cylinder body 2 for the bottom valve of tertiary cylinder body 3 is arranged between two parties, reduces the manufacturing degree of difficulty.
2. The utility model discloses a set up set screw 8 on the cylinder bottom of tertiary cylinder body 3, fix depression bar 5 on the cylinder bottom of tertiary cylinder body 3, can reduce the high pressure in the tertiary cylinder by 30%, improve the reliability of three flexible stands.
The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a three flexible stands of degradable high reliability, includes one-level cylinder body (1), its characterized in that: a second-stage cylinder body (2) is arranged in the first-stage cylinder body (1), a third-stage cylinder body (3) is arranged in the second-stage cylinder body (2), movable columns (4) are arranged on two sides in the third-stage cylinder body (3), a pressure reducing rod (5) is arranged between two groups of corresponding movable columns (4), guide sleeves (7) are arranged on two sides between the movable columns (4) and the pressure reducing rod (5), and a fixing screw (8) is arranged at one end of the pressure reducing rod (5);
piston (6) are arranged at two sides of the other end of the plunger (4), a third-stage cylinder opening guide sleeve assembly (10) is arranged at one end inside the third-stage cylinder body (3), a second-stage cylinder opening guide sleeve assembly is arranged at one end inside the second-stage cylinder body (2), and a first-stage cylinder opening guide sleeve assembly is arranged at one end inside the first-stage cylinder body (1).
2. The three telescopic columns of claim 1, wherein the lower end of the first-stage cylinder (1) is provided with a lower cavity inlet for injecting high-pressure liquid.
3. The three telescopic columns of claim 1, wherein the upper end of the first-stage cylinder (1) is provided with an upper cavity liquid inlet for injecting high-pressure liquid.
4. The three telescopic columns of claim 1, characterized in that the secondary cylinder (2) is provided with a bottom valve at one end, and the high pressure liquid passes through a liquid through hole in the secondary cylinder (2) to lower the tertiary cylinder (3) to the lowest position.
5. The pressure-reducing high-reliability three-telescopic stand column according to claim 1, wherein a boss capable of being communicated with liquid is arranged on the bottom of the secondary cylinder body (2), so that a bottom valve of the tertiary cylinder body (3) is opened, and high-pressure liquid passes through a liquid communication hole arranged in the tertiary cylinder body (3), so that the plunger (4) is lowered to a required height.
6. The pressure-reducing high-reliability three-telescopic upright post according to claim 1, characterized in that a boss capable of being communicated with liquid is arranged on the bottom of the secondary cylinder body (2), a bottom valve of the tertiary cylinder body (3) is arranged in the center, a pressure-reducing rod (5) is fixed on the bottom of the tertiary cylinder body (3), and a screw hole of a fixing screw (8) is drilled through to be superior to a blind screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222197208.XU CN218716870U (en) | 2022-08-18 | 2022-08-18 | Three flexible stands of degradable high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222197208.XU CN218716870U (en) | 2022-08-18 | 2022-08-18 | Three flexible stands of degradable high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218716870U true CN218716870U (en) | 2023-03-24 |
Family
ID=85630281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222197208.XU Active CN218716870U (en) | 2022-08-18 | 2022-08-18 | Three flexible stands of degradable high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218716870U (en) |
-
2022
- 2022-08-18 CN CN202222197208.XU patent/CN218716870U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN218716870U (en) | Three flexible stands of degradable high reliability | |
| CN115163144A (en) | Three flexible stands of degradable high reliability | |
| CN202611723U (en) | Hydraulic upright column | |
| CN204941486U (en) | A kind of gas lift valve and the eccentric gas-lift working barrel of one | |
| CN110273701A (en) | Shock resistance triple retractable column for hydraulic support | |
| CN103410534A (en) | Triple telescopic column for hydraulic support | |
| CN210370744U (en) | Impact-resistant three-telescopic upright post for hydraulic support | |
| CN217976849U (en) | Anti-impact double-telescopic stand column | |
| CN2521198Y (en) | Plunger damping hydraulic oil cylinder | |
| CN113882882A (en) | Novel scour protection stand | |
| CN201396177Y (en) | Novel automatic pressurization type setting load guarantee device | |
| CN201554477U (en) | Novel individual hydraulic prop | |
| CN208486901U (en) | Mine hydraulic bracket triple retractable column | |
| CN2467833Y (en) | Compound sealing double-water draining safety valve | |
| CN2076157U (en) | Double telescopical prop with two stage cylinders and high initial support force | |
| CN201043470Y (en) | Non-soldering double-oil cylinder suspending type mining mono-block hydraulic prop | |
| CN220687363U (en) | Elastic anti-impact device for single telescopic upright post | |
| CN201065765Y (en) | Full-mechanized hydraulic support backplate bidirectional lock | |
| CN209892544U (en) | Double-oil-cylinder continuous sequential telescopic device and two-stage telescopic arm | |
| CN2538953Y (en) | Oil well oil pumping oil booster | |
| CN113090296B (en) | Large-drift-diameter hydraulic control one-way valve | |
| CN202508822U (en) | Double-acting hydraulic jack | |
| CN2570544Y (en) | Gas-liquid cylinder sealing arrangement | |
| CN206590818U (en) | A kind of vertical hand-operated hydraulic pressure three saves jack | |
| CN210105890U (en) | Cylinder body for hydraulic support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |