CN213954054U - Mining hydraulic cylinder with structure changed and thrust increased - Google Patents
Mining hydraulic cylinder with structure changed and thrust increased Download PDFInfo
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- CN213954054U CN213954054U CN202023244416.8U CN202023244416U CN213954054U CN 213954054 U CN213954054 U CN 213954054U CN 202023244416 U CN202023244416 U CN 202023244416U CN 213954054 U CN213954054 U CN 213954054U
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Abstract
The utility model discloses a structure change increases mining pneumatic cylinder of thrust, including the one-level cylinder body, one-level cylinder body bottom is provided with the cylinder bottom ear, the inside piston rod that is provided with of one-level cylinder body, and the inside oil guide hole of having seted up of piston rod, the piston rod outside is provided with the piston ring, and the piston ring is kept away from the one end fixedly connected with second grade cylinder body of piston rod, the tip fixedly connected with piston rod ear of second grade cylinder body, be provided with the uide bushing between the tip of one-level cylinder body and the second grade cylinder body space, the rodless chamber tip of one-level cylinder body is provided with rodless chamber feed liquor valve, and the both sides of rodless chamber feed liquor valve are provided with the relief valve, and the rodless chamber tip of one-level cylinder body is provided with rodless chamber feed liquor valve. The utility model discloses an inside double piston rod structure that is of hydro-cylinder, when letting in high-pressure oil in the feed liquor valve of rodless chamber, fluid can get into third space and fourth space respectively through hole and oil guide hole in, compare in traditional pneumatic cylinder, can provide bigger thrust.
Description
Technical Field
The utility model belongs to mining application apparatus field especially relates to a structural change increases mining pneumatic cylinder of thrust.
Background
The hydraulic cylinders used in the prior coal mine are basically double-acting piston type hydraulic cylinders, and the thrust calculation formula is F = pi x D x p1(ii)/4, wherein F represents the thrust of the cylinder, D represents the cylinder bore diameter, and p1Is the rated liquid supply pressure. On the premise of not changing the design of a pump station, the liquid supply pressure is a fixed value, the diameter of the hydraulic cylinder determines the thrust of the hydraulic cylinder, the diameter of the hydraulic cylinder needs to be increased for obtaining the thrust of the hydraulic cylinder as large as possible at present, and the hydraulic cylinder with larger diameter cannot be realized due to the limitation of cost and space. Therefore, on the premise of not changing the connection size, the effective stroke and the safety factor of the hydraulic cylinder, extra thrust is provided for the hydraulic cylinder by changing the internal structure of the hydraulic cylinder, and the hydraulic cylinder is necessary to have larger thrust and load capacity.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a design changes the mining pneumatic cylinder that increases thrust for the internal structure of pneumatic cylinder, provides a structural change of extra thrust for the pneumatic cylinder.
Based on the above-mentioned purpose, the utility model discloses take following technical scheme:
a mining hydraulic cylinder with a changed structure and increased thrust comprises a primary cylinder body, wherein a cylinder bottom lug is arranged at the bottom end of the primary cylinder body, a piston rod is arranged in the primary cylinder body, an oil guide hole is formed in the piston rod, a piston ring is arranged on the outer side of the piston rod, a secondary cylinder body is fixedly connected to one end, away from the piston rod, of the piston ring, a piston rod lug is fixedly connected to the end portion of the secondary cylinder body, a guide sleeve is arranged between the end part of the first-stage cylinder body and the gap of the second-stage cylinder body, a rodless cavity liquid inlet valve is arranged at the end part of a rodless cavity of the first-stage cylinder body, safety valves are arranged at two sides of the rodless cavity liquid inlet valve, a rod cavity liquid inlet valve is arranged at the end part of a rod cavity of the first-stage cylinder body, a first gap is formed between the secondary cylinder body and the primary cylinder body and between the secondary cylinder body and the guide sleeve, a second gap is formed between the secondary cylinder body and the piston rod and between the secondary cylinder body and the piston ring, and the first gap is communicated with the second gap through a through hole formed in the secondary cylinder body.
Furthermore, a positioning hole is formed in the center line of the piston rod, a displacement sensor is installed in the positioning hole, a magnetic ring is arranged at the end of the positioning hole, the displacement sensor is fixed on the lug of the piston rod and penetrates through the magnetic ring to move in the positioning hole, a displacement sensor plug is arranged on the outer wall of the lug of the piston rod, and the displacement sensor plug is electrically connected with the displacement sensor.
Further, the displacement sensor adopts a magnetostrictive displacement sensor.
Furthermore, the secondary cylinder body is of a tubular structure, a plunger of the secondary cylinder body is provided with a piston seal, the excircle of a piston ring is provided with a static seal of a two-way seal, and a plunger of a piston rod is provided with a two-way piston seal.
Furthermore, the excircle of the guide sleeve is provided with a static seal with unilateral sealing, and the inner hole is provided with a piston rod seal with unilateral sealing.
Furthermore, the excircle of the lug of the piston rod is provided with a static seal with a single-side seal, and the displacement sensor is sealed by the static seal.
Furthermore, the magnetic ring is assembled at the end part of a positioning hole formed in the piston rod and is fixed by using a check ring for the hole.
Furthermore, the first-stage cylinder body is integrally connected with the piston rod, a sealing ring is arranged at the joint, the second-stage cylinder body is respectively connected with the piston ring and the piston rod lug through threads, and the cylinder bottom lug is fixedly connected with the first-stage cylinder body through a bolt.
Furthermore, a third gap is formed between the secondary cylinder body and the piston rod, a fourth gap is formed between the primary cylinder body and the piston rod, the fourth gap is connected with the rodless cavity liquid inlet valve through an inner hole, and the third gap is communicated with the fourth gap through an oil guide hole.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses an inside double piston rod structure that is of hydro-cylinder, when letting in high-pressure oil in the feed liquor valve of rodless chamber, fluid can get into third space and fourth space respectively through hole and oil guide hole in, compare in traditional pneumatic cylinder, can provide bigger thrust.
2. The first-stage cylinder body, the second-stage cylinder body and the piston rod of the utility model all adopt 27SiMn as the main material; the guide sleeve and the piston ring are made of 40Cr or 42CrMo, the cylinder bottom lug and the piston rod lug are made of 27SiMn forgings, and each level of sealing is made of imported polyurethane materials, so that good pressure bearing performance and sealing performance can be guaranteed, and the hydraulic cylinder can be guaranteed to provide larger thrust.
3. The utility model discloses be provided with displacement sensor, according to the magnetostrictive principle, adopt the measuring method of non-contact, because the magnetic ring of measuring usefulness and sensor self do not have direct contact, be unlikely to by friction, wearing and tearing, therefore its long service life, environmental suitability are strong, the reliability is high, and the security is good, and the system automation of being convenient for works, can the wide application in measurement, the control of mechanical displacement.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 1;
FIG. 4 is a schematic diagram of the liquid feed of the present invention;
fig. 5 is a schematic view of the liquid return of the present invention.
1. A cylinder bottom lug; 2. a primary cylinder body; 3. a piston ring; 4. a secondary cylinder body; 401. a through hole; 402. a first void; 403. a second void; 5. a piston rod; 501. an oil guide hole; 6. a displacement sensor; 601. positioning holes; 602. a magnetic ring; 7. a guide sleeve; 8. a piston rod lug; 9. a rodless cavity liquid inlet valve; 10. a safety valve; 11. a liquid inlet valve with a rod cavity; 12. a displacement sensor plug; 13. a third void; 14. and a fourth void.
Detailed Description
As shown in fig. 1-5, the utility model discloses a structural change increases mining pneumatic cylinder of thrust, including one- level cylinder body 2, 2 bottoms of one-level cylinder body are provided with cylinder bottom ear 1, and 2 inside piston rods 5 that are provided with of one-level cylinder body have seted up locating hole 601 on the central line of piston rod 5, install displacement sensor 6 in the locating hole 601, and displacement sensor 6 adopts magnetostrictive displacement sensor 6, and displacement sensor 6 is sealed from the area. The end of the positioning hole 601 is provided with a magnetic ring 602, and the magnetic ring 602 is assembled at the end of the positioning hole 601 provided in the piston rod 5 and fixed by using a hole retaining ring. The displacement sensor 6 is fixed on the piston rod ear 8 and passes through the magnetic ring 602 to move in the positioning hole 601. The piston rod 5 is internally provided with an oil guide hole 501, the piston ring 3 is arranged on the outer side of the piston rod 5, the outer circle of the piston ring 3 is provided with a static seal with a two-way seal, the inner hole is provided with two piston rod seals, and the sealing opening directions face the liquid pressing directions respectively to realize the target of the two-way seal. Piston ring 3 keeps away from one end fixedly connected with second grade cylinder body 4 of piston rod 5, and second grade cylinder body 4 is tubular structure, and 4 plunger positions of second grade cylinder body need assemble piston seal, guarantee two-way seal. The end part of the secondary cylinder body 4 is fixedly connected with a piston rod lug 8, and the excircle of the piston rod lug 8 is provided with a static seal with single-side seal. And a displacement sensor plug 12 is arranged on the outer wall of the piston rod ear 8, and the displacement sensor plug 12 is electrically connected with the displacement sensor 6. A guide sleeve 7 is arranged between the gap between the end part of the first-stage cylinder body 2 and the second-stage cylinder body 4, the excircle of the guide sleeve 7 is provided with a static seal with one-side seal, and the inner hole is provided with a piston rod seal with one-side seal. The end part of a rodless cavity of the first-stage cylinder body 2 is provided with a rodless cavity liquid inlet valve 9, two sides of the rodless cavity liquid inlet valve 9 are provided with safety valves 10, the end part of a rod cavity of the first-stage cylinder body 2 is provided with a rod cavity liquid inlet valve 11, a first gap 402 is formed between the second-stage cylinder body 4 and the first-stage cylinder body 2 as well as between the second-stage cylinder body 4 and the guide sleeve 7, a second gap 403 is formed between the second-stage cylinder body 4 and the piston rod 5 as well as between the second-stage cylinder body 4 and the piston ring 3, and the first gap 402 and the second gap 403 are communicated through a through hole 401 formed in the second-stage cylinder body 4. The first-stage cylinder body 2 is integrally connected with the piston rod 5, a sealing ring is arranged at the joint, the second-stage cylinder body 4 is respectively connected with the piston ring 3 and the piston rod lug 8 through threads, and the cylinder bottom lug 1 is fixedly connected with the first-stage cylinder body 2 through a bolt. A third gap 13 is formed between the secondary cylinder 4 and the piston rod 5, a fourth gap 14 is formed between the primary cylinder 2 and the piston rod 5, the fourth gap 14 is connected with the rodless cavity liquid inlet valve 9 through an inner hole, and the third gap 13 is communicated with the fourth gap 14 through an oil guide hole 501. The primary cylinder body 2, the secondary cylinder body 4 and the piston rod 5 are made of 27SiMn serving as main materials; the guide sleeve 7 and the piston ring 3 are made of 40Cr or 42CrMo, the cylinder bottom lug 1 and the piston rod lug 8 are made of 27SiMn forgings, and the sealing of each stage is made of imported polyurethane materials.
When the device is used, an operator introduces high-pressure oil into the rodless cavity liquid inlet valve 9, the oil enters the fourth gap 14 through the inner hole and further enters the third gap 13 through the oil guide hole 501, the oil pressure acts on the piston ring 3 and the piston rod lug 8 respectively, the secondary cylinder body 4 extends out under the action of the oil pressure, the piston rod 5 and the primary cylinder body 2 keep relatively static until the maximum stroke is reached, and the thrust of the hydraulic rod is the sum of the pressures received in the third gap 13 and the fourth gap 14. During the extending process, oil in the first gap 402 and the second gap 403 is discharged through the rod cavity liquid inlet valve 11; an operator introduces high-pressure oil into the rod cavity liquid inlet valve 11, the oil enters the first gap 402 through an inner hole and further enters the second gap 403 through the through hole 401, the first gap 402 and the second gap 403 are subjected to the pressure of the oil, so that the secondary cylinder body 4 is withdrawn, and in the withdrawing process, the oil in the third gap 13 and the fourth gap 14 is discharged through the rod-free cavity liquid inlet valve 9; during the extension of the secondary cylinder 4, the thrust provided by the piston rod lug 8 is the sum of the pressures between the third gap 13 and the fourth gap 14; during retraction, the pull force provided by the piston rod lug 8 is the sum of the pressure between the first gap 402 and the second gap 403, and has larger pull force and push force compared with the common hydraulic rod; during the extension and retraction of the secondary cylinder 4, the displacement sensor 6 on the piston rod ear 8 passes through the magnetic ring 602 to perform magnetic field negotiation, and then the moving distance is transmitted to an external display device through the displacement sensor plug 12.
Claims (9)
1. The utility model provides a mining pneumatic cylinder of thrust is increased in institutional change, includes one-level cylinder body, its characterized in that: the piston cylinder is characterized in that a cylinder bottom lug is arranged at the bottom end of the first-stage cylinder body, a piston rod is arranged in the first-stage cylinder body, an oil guide hole is formed in the piston rod, a piston ring is arranged on the outer side of the piston rod, a second-stage cylinder body is fixedly connected to one end, away from the piston rod, of the piston ring, a piston rod lug is fixedly connected to the end portion of the second-stage cylinder body, a guide sleeve is arranged between the end portion of the first-stage cylinder body and the gap of the second-stage cylinder body, a rodless cavity liquid inlet valve is arranged at the end portion of a rodless cavity of the first-stage cylinder body, safety valves are arranged on two sides of the rodless cavity liquid inlet valve, a rodless cavity liquid inlet valve is arranged at the end portion of a rodless cavity of the first-stage cylinder body, a first gap is formed between the second-stage cylinder body and the piston rod and the piston ring, and the first gap and the second gap are communicated through a through hole formed in the second-stage cylinder body.
2. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 1 is characterized in that: the piston rod is characterized in that a positioning hole is formed in the center line of the piston rod, a displacement sensor is installed in the positioning hole, a magnetic ring is arranged at the end of the positioning hole, the displacement sensor is fixed on a piston rod lug and penetrates through the magnetic ring to move in the positioning hole, a displacement sensor plug is arranged on the outer wall of the piston rod lug, and the displacement sensor plug is electrically connected with the displacement sensor.
3. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 2 is characterized in that: the displacement sensor adopts a magnetostrictive displacement sensor.
4. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 3, is characterized in that: the secondary cylinder body is of a tubular structure, a piston seal is assembled at the position of a plunger of the secondary cylinder body, a static seal of a two-way seal is assembled at the excircle of a piston ring, and a two-way piston seal is assembled at the position of a plunger of a piston rod.
5. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 4, is characterized in that: the excircle of the guide sleeve is provided with a static seal with unilateral sealing, and the inner hole is provided with a piston rod seal with unilateral sealing.
6. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 5, is characterized in that: the excircle of the piston rod lug is provided with a static seal with a unilateral seal, and the displacement sensor is sealed by the static seal.
7. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 6, is characterized in that: the magnetic ring is assembled at the end part of a positioning hole formed in the piston rod and is fixed by using a check ring for the hole.
8. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 7 is characterized in that: the first-stage cylinder body is integrally connected with the piston rod, a sealing ring is arranged at the joint, the second-stage cylinder body is respectively connected with the piston ring and the piston rod lug through threads, and the cylinder bottom lug is fixedly connected with the first-stage cylinder body through a bolt.
9. The mining hydraulic cylinder with the structure changed and the thrust increased according to claim 8, is characterized in that: and a third gap is formed between the secondary cylinder body and the piston rod, a fourth gap is formed between the primary cylinder body and the piston rod, the fourth gap is connected with the rodless cavity liquid inlet valve through an inner hole, and the third gap is communicated with the fourth gap through an oil guide hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023244416.8U CN213954054U (en) | 2020-12-29 | 2020-12-29 | Mining hydraulic cylinder with structure changed and thrust increased |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023244416.8U CN213954054U (en) | 2020-12-29 | 2020-12-29 | Mining hydraulic cylinder with structure changed and thrust increased |
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| Publication Number | Publication Date |
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| CN213954054U true CN213954054U (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023244416.8U Active CN213954054U (en) | 2020-12-29 | 2020-12-29 | Mining hydraulic cylinder with structure changed and thrust increased |
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| CN (1) | CN213954054U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803446A (en) * | 2021-09-23 | 2021-12-17 | 江苏恒立液压股份有限公司 | Hydraulic or pneumatic detection oil cylinder structure |
-
2020
- 2020-12-29 CN CN202023244416.8U patent/CN213954054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803446A (en) * | 2021-09-23 | 2021-12-17 | 江苏恒立液压股份有限公司 | Hydraulic or pneumatic detection oil cylinder structure |
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