Liquid leakage prevention type hydraulic oil cylinder

Abstract

The invention relates to the technical field of hydraulic oil cylinders, and particularly discloses a liquid leakage prevention type hydraulic oil cylinder which comprises a hydraulic cylinder part, the hydraulic cylinder part comprises a hydraulic cylinder body, the hydraulic cylinder body comprises an outer cylinder body, and a working cylinder hole, a downward moving exhaust cavity, an upward moving exhaust cavity and a pressure storage cavity are formed in the outer cylinder body; the working cylinder hole, the downward-moving exhaust cavity, the upward-moving exhaust cavity and the pressure storage cavity are separated through circular rings and are communicated with one another, one-way holes are formed in the outer wall of the downward-moving exhaust cavity and the outer wall of the upward-moving exhaust cavity, a control hole is formed in the outer side wall of the pressure storage cavity, and the one-way holes are communicated with the control hole through long ventilation holes. By means of the air curtain design, when the thick rod body moves, an air curtain is formed through air flowing, dust is effectively prevented from adhering to the thick rod body, the dust is prevented from entering the cylinder body to pollute oil liquid and adhering to a piston, abrasion of the hydraulic cylinder is reduced, the oil liquid seepage risk is reduced, and the service life of the hydraulic cylinder is prolonged.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, and more specifically to a leak-proof hydraulic cylinder. Background Technology

[0002] Leak-proof hydraulic cylinders represent a significant innovation in the current hydraulic technology field. They aim to solve the oil leakage problem caused by seal failure in traditional hydraulic cylinders, thereby improving equipment reliability and environmental friendliness. Existing leak-proof designs primarily achieve this through optimized sealing structures, the introduction of new sealing materials, and innovative connection methods. For example, some patented technologies employ conical inner tubes and anti-leakage corrugated designs to enhance sealing stability; or they use one-way leak-proof components in conjunction with locking structures to prevent leakage caused by detachment of oil pipe connectors. Furthermore, integrated filter designs can effectively intercept impurities in the oil, reducing seal wear and extending service life. In terms of industry applications, leak-proof hydraulic cylinders are widely used in engineering machinery, ships, energy equipment, and other fields, performing particularly well in scenarios requiring high reliability. With the development of industrial automation and intelligence, leak-proof technology is being combined with lightweight materials and intelligent sensors, driving the upgrading of hydraulic cylinders towards high efficiency, energy saving, and environmental protection.

[0003] Chinese patent publication number CN121322482A discloses a double-seal adjustable hydraulic cylinder anti-leakage mechanism and its hydraulic cylinder. The mechanism includes a cylinder barrel, a piston rod slidably mounted inside the cylinder barrel, a sleeve inside the cylinder barrel that fits onto the outer wall of the piston rod, a first sealing ring inside the sleeve that also fits onto the outer wall of the piston rod, multiple sets of adjusting screws rotatably mounted on the upper end of the sleeve, each set of adjusting screws having its end furthest from the sleeve connected to the cylinder barrel by a thread, and multiple sets of sealing components at the upper end of the cylinder barrel, each set of sealing components being adapted to a corresponding adjusting screw. A second and third sealing ring are embedded inside the cylinder barrel. This mechanism reduces maintenance difficulty, eliminates the need to disassemble the equipment, quickly eliminates minor hydraulic oil leaks caused by prolonged extension and retraction, improves the sealing performance of the hydraulic cylinder, and reduces maintenance costs.

[0004] Currently, when conventional leak-proof hydraulic cylinders operate in dusty environments, excessive dust accumulates on their surfaces over time. When the piston moves, this dust easily enters the cylinder body, contaminating the hydraulic fluid. Dust adheres to both the inside of the cylinder and the outside of the piston, causing wear and tear on the hydraulic cylinder during piston extension and retraction. Over time, this leads to internal oil leakage. Furthermore, leaks in conventional leak-proof hydraulic cylinders are difficult to detect promptly, and the extent of oil pressure leakage is hard to ascertain, posing a safety hazard. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a leak-proof hydraulic cylinder to solve the problems existing in the background art.

[0006] The present invention provides the following technical solution: a leak-proof hydraulic cylinder, comprising a hydraulic cylinder component, wherein the hydraulic cylinder component includes a hydraulic cylinder body, the hydraulic cylinder body includes an outer cylinder body, the outer cylinder body is provided with a working cylinder bore, a downward exhaust chamber, an upward exhaust chamber and a pressure accumulator chamber, the working cylinder bore, the downward exhaust chamber, the upward exhaust chamber and the pressure accumulator chamber are separated by an annulus and interconnected with each other, the outer walls of the downward exhaust chamber and the upward exhaust chamber are provided with one-way holes, the outer wall of the pressure accumulator chamber is provided with a control hole, the one-way hole and the control hole are connected through a long vent hole, the bottom of the long vent hole is connected to an annular hole, the bottom of the annular hole is provided with multiple air curtain holes, the air curtain holes penetrate the bottom of the outer cylinder body and are connected to the outside; The hydraulic cylinder body is internally connected to a piston head via a sliding seal. A thin rod is fixedly connected to the upper part of the piston head, and a thick rod is fixedly connected to the bottom of the piston head. The piston head is slidably and sealed to the working cylinder bore. The thin rod is slidably and sealed to each of the rings. A lower push air sealing block, an upper push air sealing block, and a pressure accumulator are fixedly connected to the outer side of the thin rod. The lower push air sealing block, the upper push air sealing block, and the pressure accumulator are respectively sealed to the lower exhaust chamber, the upper exhaust chamber, and the pressure accumulator. Furthermore, a pressure measuring pipe is connected to the upper part of the working cylinder bore, and the pressure measuring pipe is located on the side wall of the outer cylinder body. The bottom of the pressure measuring pipe is connected to the pressure measuring cylinder bore. A first warning hole and a second warning hole are provided on the outer side of the pressure measuring cylinder bore, and the first warning hole and the second warning hole are connected to the outside. The bottom of the second warning hole is provided with a first T-slot, which is connected to the pressure measuring cylinder bore. A stop block is fixedly connected to the outer side of the first T-slot. The side walls of the downward exhaust chamber, the upward exhaust chamber, and the accumulator chamber are provided with external through holes, which are connected to the outside. A moving component is fixedly connected to the bottom of the pressure measuring cylinder bore, and the top of the moving component... The device is equipped with a spring-loaded adjustment assembly, a lower gas-generating assembly is slidably connected inside the lower exhaust chamber, a pressure-accumulating assembly is slidably connected inside the pressure-accumulating chamber, a pressure-bearing assembly is installed above the spring-loaded adjustment assembly, a pushing assembly is installed inside the pressure-bearing assembly, a pop-out assembly is snapped onto one side of the pressure-bearing assembly, a first-stage warning element is movably installed inside the pop-out assembly, a second-stage warning element is movably installed inside the pressure-bearing assembly, the second-stage warning element is located above the first-stage warning element, a pressure sensor is fixedly connected to the top of the pressure-accumulating assembly, and an upper gas-generating assembly is slidably connected inside the upper exhaust chamber.

[0007] Furthermore, the moving component includes a motor, the motor housing of which is fixedly connected to the bottom of the pressure measuring cylinder bore. A screw is fixedly connected to the motor shaft, and a guide rod is installed on the side of the screw. The bottom of the guide rod is rotatably connected to the pressure measuring cylinder bore. A first bracket is rotatably connected to the top of the guide rod and the screw. The first bracket is fixedly connected to the side wall of the pressure measuring cylinder bore. The elastic adjustment component includes a moving block, which is helically connected to the screw. The moving block is slidably connected to the guide rod. A telescopic rod is fixedly connected to the top of the moving block, and a pressure-bearing component is fixedly connected to the top of the telescopic rod. A first spring is sleeved on the outside of the telescopic rod, and the bottom and top of the first spring are fixedly connected to the moving block and the pressure-bearing component, respectively.

[0008] Furthermore, the pushing component includes a fixed rod, with second brackets fixedly connected to both sides of the fixed rod. The second brackets are fixedly connected to the pressure-bearing component. A flipping block, a fixed block, and a torsion spring are rotatably connected to the outer side of the fixed rod. The fixed block is fixedly connected to the pressure-bearing component. The flipping block presses against the ejector component under the elastic action of the torsion spring. A stop block is fixedly connected to the bottom of the downward-pushing air sealing block. Both the downward-pushing air sealing block and the stop block are slidably connected to the downward-moving exhaust chamber. The stop block can completely seal the one-way hole. An exhaust one-way valve is sealed inside the one-way hole. A first intake one-way valve is sealed inside the outer through hole. Two first built-in one-way valves are sealed inside the venting elongated hole. The first built-in one-way valve is located between the one-way holes, and the other first built-in one-way valve is located between the one-way hole and the control hole.

[0009] Furthermore, the accumulator head is fixedly connected to the top of the thin rod, the pressure sensor is fixedly connected to the top of the accumulator head, a second air intake check valve is sealed inside the control hole, a control valve is sealed inside the external through hole of the accumulator chamber, the pressure-bearing component includes a hydraulic force-bearing block, a first clearance hole is provided inside the hydraulic force-bearing block, a second stage warning element is provided inside the first clearance hole, a clearance groove is provided at the bottom of the hydraulic force-bearing block, an insert is fixedly connected inside the clearance groove, a connecting block is fixedly connected at the bottom of the hydraulic force-bearing block, the connecting block is offset from the clearance groove, an elastic force-bearing block is fixedly connected at the bottom of the connecting block, and a second T-shaped groove is provided on the surface of the elastic force-bearing block.

[0010] Furthermore, the first stage warning component includes a second spring, with a first warning block fixedly connected to the outer side of the second spring and the inner side of the second spring fixedly connected to the ejection assembly. The second stage warning component also includes a third spring, with a second warning block fixedly connected to the outer side of the third spring and the inner side of the third spring fixedly connected to the inner wall of the first clearance hole.

[0011] Furthermore, the pop-out component includes a pop-out block that is slidably connected to the inner wall of the pressure measuring cylinder bore. The bottom of the pop-out block is provided with a second clearance hole, the inner wall of which is fixedly connected to the inner side of the second spring. A T-shaped block is fixedly connected to the bottom of the pop-out block, located at the bottom of the second clearance hole. The T-shaped block is slidably connected to a second T-shaped groove and can be slidably connected to a first T-shaped groove. A locking hole is provided in the middle of the pop-out block, and the insert can be locked inside the locking hole. A locking block is fixedly connected to the side of the pop-out block, located directly above the locking hole, and can be locked inside the clearance groove.

[0012] Furthermore, the upward-pushing air sealing block is slidably and sealingly connected to the inner wall of the upward-moving exhaust chamber. A pushing block is fixedly connected to the top of the upward-pushing air sealing block, and an air vent is provided at the lower right corner of the pushing block. A pushing plate is fixedly connected to the top of the pushing block, and a telescopic sealing block is fixedly connected to the top of the pushing plate. The top of the telescopic sealing block is fixedly connected to a ring. When the telescopic sealing block is fully extended, it can completely seal the second built-in one-way valve. The one-way hole is sealed with the second built-in one-way valve.

[0013] The technical effects and advantages of this invention are as follows: 1. By incorporating a hydraulic cylinder, this invention facilitates the formation of an air curtain during the movement of the thick rod, effectively preventing dust from adhering to the thick rod, avoiding dust from entering the cylinder and contaminating the oil or adhering to the piston, reducing hydraulic cylinder wear, lowering the risk of oil leakage, and extending the service life of the hydraulic cylinder.

[0014] 2. The present invention, by providing a first-stage warning device and a second-stage warning device, facilitates the real-time transmission of hydraulic cylinder pressure. When the hydraulic cylinder leaks, the warning devices at different stages pop up, allowing workers to promptly detect abnormal hydraulic pressure, accurately understand the degree of leakage, take measures in advance, eliminate safety hazards, and ensure the safe operation of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the half-section structure of the present invention.

[0018] Figure 4 For the present invention Figure 3 A magnified structural diagram at point a.

[0019] Figure 5 For the present invention Figure 3 A magnified structural diagram at point b.

[0020] Figure 6 For the present invention Figure 3 A magnified structural diagram at point c.

[0021] Figure 7 This is a schematic diagram of the internal assembly structure of the pressure measuring cylinder bore of the present invention.

[0022] Figure 8 This is a schematic diagram of a half-section of the hydraulic cylinder body of the present invention.

[0023] Figure 9 This is a schematic diagram of the pop-up component structure of the present invention.

[0024] Figure 10 This is a schematic diagram of the pressure-bearing component structure of the present invention.

[0025] The attached figures are labeled as follows: 1. Hydraulic cylinder component; 101. Hydraulic cylinder body; 1011. Outer cylinder body; 1012. First warning hole; 1013. Second warning hole; 1014. First T-slot; 1015. Pressure measuring pipe hole; 1016. Pressure measuring cylinder hole; 1017. Vent hole; 1018. Annular hole; 1019. Air curtain hole; 1020. Stop block; 1021. Working cylinder hole; 1022. Circular ring; 1023. Lowering exhaust chamber; 1024. Uppering exhaust chamber; 1025. Accumulator chamber; 1026. 1. External through hole; 1027. One-way hole; 1028. Control hole; 102. Thick rod; 103. Piston head; 104. Thin rod; 2. Moving assembly; 201. Motor; 202. Screw; 203. Guide rod; 204. First bracket; 3. Elastic adjustment assembly; 301. Moving block; 302. Telescopic rod; 303. First spring; 4. Pushing assembly; 401. Fixed rod; 402. Flipping block; 403. Fixed block; 404. Torsion spring; 405. Second bracket; 5. Lower gas production assembly; 501. Downward-pushing air seal block; 502. Stop block; 503. Exhaust check valve; 504. First intake check valve; 505. First built-in check valve; 6. Pressure accumulator assembly; 601. Pressure accumulator head; 602. Second intake check valve; 603. Control valve; 7. Pressure-bearing assembly; 701. Hydraulic force-bearing block; 702. First clearance hole; 703. Clearance groove; 704. Insert block; 705. Connecting block; 706. Elastic force-bearing block; 707. Second T-slot; 8. First stage warning element; 801. Second spring... 802. Spring; 9. First warning block; 10. Second stage warning component; 11. Third spring; 12. Second warning block; 13. Pop-out assembly; 14. Pop-out block; 15. Second clearance hole; 16. T-block; 17. Locking hole; 18. Locking block; 19. Pressure sensor; 10. Upper gas generation assembly; 12. Upper push-air sealing block; 12. Pushing block; 13. Vent hole; 14. Push plate; 15. Telescopic sealing block; 16. Second built-in one-way valve. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The leak-proof hydraulic cylinder involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 This invention provides a leak-proof hydraulic cylinder, including a hydraulic cylinder component 1. The hydraulic cylinder component 1 includes a hydraulic cylinder body 101, which includes an outer cylinder body 1011. The outer cylinder body 1011 has a working cylinder bore 1021, a downward exhaust chamber 1023, an upward exhaust chamber 1024, and a pressure accumulator 1025 inside. The working cylinder bore 1021, the downward exhaust chamber 1023, the upward exhaust chamber 1024, and the pressure accumulator 1025 are separated by a ring 1022. The outer walls of the downward exhaust chamber 1023 and the upward exhaust chamber 1024 are provided with one-way holes 1027, and the outer wall of the accumulator chamber 1025 is provided with a control hole 1028. The one-way hole 1027 and the control hole 1028 are connected through a long vent hole 1017. The bottom of the long vent hole 1017 is connected to an annular hole 1018. The bottom of the annular hole 1018 is provided with multiple air curtain holes 1019. The air curtain holes 1019 penetrate the bottom of the outer cylinder block 1011 and communicate with the outside. The hydraulic cylinder body 101 is internally connected to a piston head 103 via a sliding seal. A thin rod 104 is fixedly connected to the upper part of the piston head 103, and a thick rod 102 is fixedly connected to the bottom of the piston head 103. The piston head 103 is slidably and sealed to the working cylinder bore 1021. The thin rod 104 is slidably and sealed to each of the rings 1022. A lower push air seal block 501, an upper push air seal block 1201, and a pressure accumulator 601 are fixedly connected to the outer side of the thin rod 104. The lower push air seal block 501, the upper push air seal block 1201, and the pressure accumulator 601 are respectively sealed to the lower exhaust chamber 1023, the upper exhaust chamber 1024, and the pressure accumulator 1025. In this embodiment, it should be specifically noted that the leak-proof hydraulic cylinder is connected to an external oil tank, and the external oil tank supplies oil to the cylinder.

[0028] The main difference between this embodiment and the prior art is that the gas flow and the active role of the oil cylinder in this embodiment generate an air curtain around the thick rod 102, specifically in the hydraulic cylinder 1, the lower gas generation component 5 and the pressure accumulator component 6. The above structure is the main structure of this embodiment, which solves the problem of dust being difficult to isolate. The sealing method of the hydraulic cylinder 101 and other components is an existing structure. The specific structure and connection method of the sealing method of the hydraulic cylinder 101 and other components will not be described in detail in this embodiment.

[0029] Reference Figure 1 , Figure 2 and Figure 8 The upper part of the working cylinder bore 1021 is connected to a pressure measuring pipe bore 1015, which is located on the side wall of the outer cylinder body 1011. The bottom of the pressure measuring pipe bore 1015 is connected to a pressure measuring cylinder bore 1016. The outer side of the pressure measuring cylinder bore 1016 is provided with a first warning hole 1012 and a second warning hole 1013, which are in communication with the outside. The bottom of the second warning hole 1013 is provided with a first T-slot 1014, which is in communication with the pressure measuring cylinder bore 1016. A stop block 1020 is fixedly connected to the outer side of the first T-slot 1014. The side walls of the lower exhaust chamber 1023, the upper exhaust chamber 1024, and the accumulator chamber 1025 are provided with external through holes 1026, which are in communication with the outside. A movable component 2 is fixedly connected to the bottom of the cylinder bore 1016. A spring force adjustment component 3 is movably connected to the top of the movable component 2. A lower gas generation component 5 is slidably connected inside the lower exhaust chamber 1023. A pressure accumulator component 6 is slidably connected inside the pressure accumulator chamber 1025. A pressure bearing component 7 is installed above the spring force adjustment component 3. A push component 4 is installed inside the pressure bearing component 7. A pop-out component 10 is snapped onto one side of the pressure bearing component 7. A first-stage warning component 8 is movably installed inside the pop-out component 10. A second-stage warning component 9 is movably installed inside the pressure bearing component 7. The second-stage warning component 9 is located above the first-stage warning component 8. A pressure sensor 11 is fixedly connected to the top of the pressure accumulator component 6. An upper gas generation component 12 is slidably connected inside the upper exhaust chamber 1024.

[0030] In this embodiment, it should be specifically noted that the pressure sensor 11 is an existing structure, and the specific structure and connection method of the pressure sensor 11 will not be described in detail in this embodiment.

[0031] Reference Figure 2 , Figure 3 and Figure 7 The moving component 2 includes a motor 201. The housing of the motor 201 is fixedly connected to the bottom of the pressure measuring cylinder bore 1016. A screw 202 is fixedly connected to the rotating shaft of the motor 201. A guide rod 203 is installed on the side of the screw 202. The bottom of the guide rod 203 is rotatably connected to the pressure measuring cylinder bore 1016. A first bracket 204 is rotatably connected to the top of the guide rod 203 and the screw 202. The first bracket 204 is fixedly connected to the side wall of the pressure measuring cylinder bore 1016.

[0032] In this embodiment, it should be specifically explained that when the minimum working pressure of the oil cylinder is determined, the motor 201 is started, which drives the screw 202 to rotate, and the screw 202 drives the elastic adjustment component 3 to move.

[0033] Reference Figure 2 , Figure 3 and Figure 7 The elastic adjustment component 3 includes a movable block 301, which is connected to the screw 202 by a screw drive. The movable block 301 is slidably connected to the guide rod 203. A telescopic rod 302 is fixedly connected to the top of the movable block 301. A pressure-bearing component 7 is fixedly connected to the top of the telescopic rod 302. A first spring 303 is sleeved on the outside of the telescopic rod 302. The bottom and top of the first spring 303 are fixedly connected to the movable block 301 and the pressure-bearing component 7, respectively.

[0034] In this embodiment, it should be specifically explained that when the screw 202 is rotated, the moving block 301 moves upward or downward, compressing or releasing the first spring 303, so that the deformation of the first spring 303 matches the minimum working pressure of the oil cylinder.

[0035] Reference Figure 2 , Figure 3 and Figure 7 The pushing component 4 includes a fixed rod 401, with second brackets 405 fixedly connected to both sides of the fixed rod 401. The second brackets 405 are fixedly connected to the pressure-bearing component 7. A flipping block plate 402, a fixed block plate 403, and a torsion spring 404 are rotatably connected to the outside of the fixed rod 401. The fixed block plate 403 is fixedly connected to the pressure-bearing component 7. The flipping block plate 402 presses the ejection component 10 tightly under the elastic action of the torsion spring 404.

[0036] In this embodiment, it should be specifically noted that when the pop-out component 10 reaches the predetermined position, the pop-out component 10 moves rapidly under the elastic action of the torsion spring 404.

[0037] Reference Figure 2 , Figure 3 and Figure 5 A stop block 502 is fixedly connected to the bottom of the downward push air seal block 501. Both the downward push air seal block 501 and the stop block 502 are slidably connected to the downward exhaust chamber 1023. The stop block 502 can completely seal the one-way hole 1027. An exhaust one-way valve 503 is sealed inside the one-way hole 1027, and a first intake one-way valve 504 is sealed inside the outer through hole 1026.

[0038] In this embodiment, it should be specifically explained that: when the oil pressure inside the working cylinder bore 1021 is applied, the thick rod 102 moves downward, thereby driving the downward push air seal block 501 and the stop block 502 inside the downward exhaust chamber 1023 to move downward. The downward push air seal block 501 compresses the air at the bottom of the downward push air seal block 501 and discharges it through the exhaust one-way valve 503. Due to the presence of the first built-in one-way valve 505, the gas can only move downward through the vent hole 1017. Subsequently, the gas enters the annular hole 1018 and is discharged from the air curtain hole 1019, forming an air curtain outside the thick rod 102 to prevent dust from adhering to the thick rod 102.

[0039] Reference Figures 2-4 The accumulator head 601 is fixedly connected to the top of the thin rod 104, the pressure sensor 11 is fixedly connected to the top of the accumulator head 601, the control hole 1028 is sealed with a second air intake check valve 602, and the external through hole 1026 inside the accumulator chamber 1025 is sealed with a control valve 603.

[0040] In this embodiment, it should be specifically explained that when the thick rod 102 drives the accumulator head 601 to move back and forth, the air pressure between the accumulator head 601 and the top of the hydraulic cylinder 101 increases continuously through the control valve 603. When the thick rod 102 stops, the pressure sensor 11 senses that the air pressure it is in has not changed for a long time. Through the control valve 603, the air pressure in the pressure sensor 11 is discharged through the vent hole 1017 and the air curtain hole 1019 to form an air curtain to protect the extended thick rod 102 and prevent dust from adhering to the thick rod 102.

[0041] Reference Figure 7 and Figure 10 The pressure-bearing component 7 includes a hydraulic force-bearing block 701. The hydraulic force-bearing block 701 has a first clearance hole 702 inside. The first clearance hole 702 has a second stage warning element 9 inside. The bottom of the hydraulic force-bearing block 701 has a clearance groove 703. An insert block 704 is fixedly connected inside the clearance groove 703. A connecting block 705 is fixedly connected to the bottom of the hydraulic force-bearing block 701. The connecting block 705 is offset from the clearance groove 703. An elastic force-bearing block 706 is fixedly connected to the bottom of the connecting block 705. The surface of the elastic force-bearing block 706 has a second T-groove 707.

[0042] In this embodiment, it should be specifically explained that when the oil cylinder is working, leakage occurs in the oil cylinder, and the pressure inside the oil cylinder drops to the minimum working pressure of the oil cylinder. During this process, the elastic force of the first spring 303 pushes the pressure-bearing component 7 to rise.

[0043] Reference Figure 7The first-stage warning component 8 includes a second spring 801, with a first warning block 802 fixedly connected to the outer side of the second spring 801, and the inner side of the second spring 801 fixedly connected to the pop-up assembly 10.

[0044] In this embodiment, it should be specifically explained that: subsequently, the pop-out component 10 completely separates from the pressure-bearing component 7, and the first warning block 802 inside the pop-out component 10 is quickly ejected under the elastic action of the second spring 801, so that the worker can observe that the oil pressure of the oil cylinder is abnormal and find that it is a problem of oil cylinder leakage.

[0045] Reference Figure 7 The second-stage warning component 9 includes a third spring 901, with a second warning block 902 fixedly connected to the outer side of the third spring 901, and the inner side of the third spring 901 fixedly connected to the inner wall of the first clearance hole 702.

[0046] In this embodiment, it should be specifically explained that when the oil pressure of the cylinder drops significantly due to leakage, the pressure-bearing component 7 continues to rise under the elastic action of the first spring 303 until the second warning block 902 is aligned with the first warning hole 1012, and then quickly pops out from the first warning hole 1012 under the elastic action of the third spring 901. At this time, the worker can know that the cylinder has a serious leakage.

[0047] Reference Figure 7 and Figure 9 The pop-out component 10 includes a pop-out block 1001, which is slidably connected to the inner wall of the pressure measuring cylinder hole 1016. The bottom of the pop-out block 1001 is provided with a second clearance hole 1002, and the inner wall of the second clearance hole 1002 is fixedly connected to the inner side of the second spring 801. A T-shaped block 1003 is fixedly connected to the bottom of the pop-out block 1001. The T-shaped block 1003 is located at the bottom of the second clearance hole 1002 and is slidably connected to a second T-shaped groove 707. The T-shaped block 1003 can be slidably connected to a first T-shaped groove 1014. A locking hole 1004 is provided in the middle of the pop-out block 1001, and the insertion block 704 can be locked inside the locking hole 1004. A locking block 1005 is fixedly connected to the side of the pop-out block 1001. The locking block 1005 is located directly above the locking hole 1004 and can be locked inside the clearance groove 703.

[0048] In this embodiment, it should be specifically explained that when the pop-out component 10 rises to the point where the T-shaped block 1003 is aligned with the first T-shaped groove 1014, the pop-out component 10, under the elastic action of the torsion spring 404, quickly pushes the T-shaped block 1003 into the first T-shaped groove 1014 by the flipping block plate 402.

[0049] Reference Figure 3 and Figure 6The upper push air sealing block 1201 is slidably and sealingly connected to the inner wall of the upper exhaust chamber 1024. The top of the upper push air sealing block 1201 is fixedly connected to the push block 1202. The lower right corner of the push block 1202 is provided with an air vent 1203. The top of the push block 1202 is fixedly connected to the push plate 1204. The top of the push plate 1204 is fixedly connected to the telescopic sealing block 1205. The top of the telescopic sealing block 1205 is fixedly connected to the ring 1022. When the telescopic sealing block 1205 is fully extended, it can completely seal the second built-in one-way valve 1206. The one-way hole 1027 is sealed and connected to the second built-in one-way valve 1206.

[0050] In this embodiment, it should be specifically explained that when the thick rod 102 moves upward, the upward-pushing air sealing block 1201 and the pushing block 1202 inside the upward-moving exhaust chamber 1024 push the pushing plate 1204 upward, and the telescopic sealing block 1205 contracts accordingly. Air flows out from the vent hole 1203 through the vent elongated hole 1017, the annular hole 1018 and the air curtain hole 1019 to form an air curtain. As the telescopic sealing block 1205 contracts accordingly, it gradually stops blocking the second built-in one-way valve 1206. This is equivalent to the air flow cross-sectional area of ​​the second built-in one-way valve 1206 continuously increasing and the air flow velocity continuously decreasing, which matches the contraction length of the thick rod 102.

[0051] Working principle of the invention: The main problem solved by this embodiment is to use the fluidity of gas and the initiative of the hydraulic cylinder to generate an air curtain around the thick rod 102, thereby isolating dust and making it difficult for dust to adhere to the thick rod 102. Furthermore, by utilizing the real-time transmission of hydraulic cylinder pressure, the problem of difficulty in detecting reduced hydraulic cylinder pressure during leakage is solved.

[0052] The specific steps are as follows: First, determine the minimum working pressure of the hydraulic cylinder, start the motor 201, drive the screw 202 to rotate, and drive the moving block 301 to move upward or downward, compressing or releasing the first spring 303, so that the deformation of the first spring 303 matches the minimum working pressure of the hydraulic cylinder, so that the first warning block 802 and the second warning block 902 can pop out of the outside of the hydraulic cylinder body 101 after the first spring 303 has undergone the matched elastic deformation. When the hydraulic cylinder is working, leakage occurs in the hydraulic cylinder, and the pressure inside the hydraulic cylinder drops to the minimum working pressure of the hydraulic cylinder. During this process, the elastic force of the first spring 303 pushes the pressure-bearing component 7 to rise, and the pop-out component 10 also rises accordingly. When the pop-out component 10 rises to the point where the T-shaped block 1003 aligns with the first T-shaped groove 1014... Under the elastic action of the torsion spring 404, the pop-out component 10 quickly pushes the flip plate 402 to push the T-shaped block 1003 into the first T-shaped groove 1014. Then, the pop-out component 10 completely leaves the pressure-bearing component 7. The first warning block 802 inside the pop-out component 10 quickly pops out under the elastic action of the second spring 801. The worker can then observe that the oil pressure of the cylinder is abnormal and find that the cylinder is leaking. When the oil pressure of the cylinder drops severely due to leakage, the pressure-bearing component 7 continues to rise under the elastic action of the first spring 303 until the second warning block 902 is aligned with the first warning hole 1012. Under the elastic action of the third spring 901, it quickly pops out from the first warning hole 1012. At this time, the worker can know that the cylinder has a serious leak. When the oil pressure inside the working cylinder bore 1021 causes the thick rod body 102 to move downwards, it drives the downward-pushing air seal block 501 and the baffle block 502 inside the downward-moving exhaust chamber 1023 to move downwards. The downward-pushing air seal block 501 compresses the air at the bottom of the downward-pushing air seal block 501 and discharges it through the exhaust one-way valve 503. Due to the presence of the first built-in one-way valve 505, the gas can only move downwards through the vent hole 1017. Subsequently, the gas enters the annular hole 1018 and is discharged from the air curtain hole 1019, forming an air curtain outside the thick rod body 102 to prevent dust from adhering to the thick rod body 102. At the same time, the upward-pushing air seal block 1201 inside the upward-moving exhaust chamber 1024 descends, generating negative pressure and drawing in external air through the external through hole 1026. Since the baffle block 502 also moves downwards, the air flow cross-sectional area of ​​the exhaust one-way valve 503 continuously decreases. Thus, the downward-pushing air seal block 501... When the rod descends to the same height, the pressure of the exhaust gas is greater, which makes the thick rod 102 extend longer. The gas flow velocity generated around the thick rod 102 is faster, the air curtain impacts farther, and the length of the protected thick rod 102 is longer, which matches the extension length of the thick rod 102. When the thick rod 102 moves upward, the upward-moving air-sealing block 1201 and the pushing block 1202 inside the upward-moving exhaust chamber 1024 push the pushing plate 1204 upward. The telescopic sealing block 1205 contracts accordingly, and air flows out from the vent hole 1203 through the vent hole 1017, the annular hole 1018 and the air curtain hole 1019 to form an air curtain. As the telescopic sealing block 1205 contracts accordingly, it gradually stops blocking the second built-in one-way valve 1206. This means that the air flow cross-sectional area of ​​the second built-in one-way valve 1206 is constantly increasing and the air flow velocity is constantly decreasing, which matches the contraction length of the thick rod 102. When the thick rod 102 drives the accumulator head 601 to move back and forth, the air pressure between the accumulator head 601 and the top of the hydraulic cylinder 101 increases continuously through the control valve 603. When the thick rod 102 stops, the pressure sensor 11 senses that the air pressure it is in has not changed for a long time. Through the control valve 603, the air pressure in the pressure sensor 11 is discharged through the vent hole 1017 and the air curtain hole 1019 to form an air curtain to protect the extended thick rod 102 and prevent dust from adhering to the thick rod 102.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof hydraulic cylinder, comprising a hydraulic cylinder component (1), characterized in that: The hydraulic cylinder component (1) includes a hydraulic cylinder body (101), which includes an outer cylinder body (1011). The outer cylinder body (1011) is provided with a working cylinder bore (1021), a downward exhaust chamber (1023), an upward exhaust chamber (1024), and a pressure accumulator (1025). The working cylinder bore (1021), the downward exhaust chamber (1023), the upward exhaust chamber (1024), and the pressure accumulator (1025) are separated by a ring (1022) and are interconnected. The downward exhaust chamber (1023) is... 3) The outer wall of the upward exhaust chamber (1024) is provided with a one-way hole (1027), and the outer wall of the accumulator chamber (1025) is provided with a control hole (1028). The one-way hole (1027) and the control hole (1028) are connected through a long ventilation hole (1017). The bottom of the long ventilation hole (1017) is connected to an annular hole (1018). The bottom of the annular hole (1018) is provided with multiple air curtain holes (1019). The air curtain holes (1019) penetrate the bottom of the outer cylinder block (1011) and are connected to the outside. The hydraulic cylinder body (101) is internally connected to a piston head (103) via a sliding seal. A thin rod body (104) is fixedly connected to the upper part of the piston head (103), and a thick rod body (102) is fixedly connected to the bottom of the piston head (103). The piston head (103) is slidably and sealed to the working cylinder bore (1021). The thin rod body (104) is slidably and sealed to each of the rings (1022). A lower push air seal block (501), an upper push air seal block (1201), and a pressure accumulator head (601) are fixedly connected to the outer side of the thin rod body (104). The lower push air seal block (501), the upper push air seal block (1201), and the pressure accumulator head (601) are respectively sealed to the lower exhaust chamber (1023), the upper exhaust chamber (1024), and the pressure accumulator chamber (1025).

2. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: The upper part of the working cylinder bore (1021) is connected to a pressure measuring pipe bore (1015), which is located on the side wall of the outer cylinder body (1011). The bottom of the pressure measuring pipe bore (1015) is connected to a pressure measuring cylinder bore (1016). A first warning hole (1012) and a second warning hole (1013) are provided on the outer side of the pressure measuring cylinder bore (1016). The first warning hole (1012) and the second warning hole (1013) are in communication with the outside. The bottom of the warning hole (1013) is provided with a first T-slot (1014), which communicates with the pressure measuring cylinder hole (1016). A stop block (1020) is fixedly connected to the outside of the first T-slot (1014). The side walls of the downward exhaust chamber (1023), the upward exhaust chamber (1024), and the accumulator chamber (1025) are provided with external through holes (1026), which communicate with the outside. The pressure measuring cylinder hole (1016) is provided with a first T-slot (1014) which communicates with the outside. 16) is fixedly connected to a moving component (2), the top of the moving component (2) is movably connected to an elastic adjustment component (3), the lower gas generation component (5) is slidably connected inside the lower exhaust chamber (1023), the pressure accumulator component (6) is slidably connected inside the pressure accumulator chamber (1025), the pressure bearing component (7) is installed above the elastic adjustment component (3), the push component (4) is installed inside the pressure bearing component (7), the pop-out component (10) is snapped onto one side of the pressure bearing component (7), the first stage warning component (8) is movably installed inside the pop-out component (10), the second stage warning component (9) is movably installed inside the pressure bearing component (7), the second stage warning component (9) is located above the first stage warning component (8), the pressure sensor (11) is fixedly connected to the top of the pressure accumulator component (6), and the upper gas generation component (12) is slidably connected inside the upper exhaust chamber (1024).

3. A leak-proof hydraulic cylinder according to claim 2, characterized in that: The moving component (2) includes a motor (201). The housing of the motor (201) is fixedly connected to the bottom of the pressure measuring cylinder bore (1016). A screw (202) is fixedly connected to the shaft of the motor (201). A guide rod (203) is installed on the side of the screw (202). The bottom of the guide rod (203) is rotatably connected to the pressure measuring cylinder bore (1016). A first bracket (204) is rotatably connected to the top of the guide rod (203) and the screw (202). The first bracket (204) is fixedly connected to the side wall of the pressure measuring cylinder bore (1016). The elastic adjustment component (3) includes a movable block (301), which is connected to a screw (202) via a helical transmission. The movable block (301) is slidably connected to a guide rod (203). A telescopic rod (302) is fixedly connected to the top of the movable block (301), and a pressure-bearing component (7) is fixedly connected to the top of the telescopic rod (302). A first spring (303) is sleeved on the outside of the telescopic rod (302), and the bottom and top of the first spring (303) are fixedly connected to the movable block (301) and the pressure-bearing component (7) respectively.

4. A leak-proof hydraulic cylinder according to claim 2, characterized in that: The pushing assembly (4) includes a fixed rod (401), with second brackets (405) fixedly connected to both sides of the fixed rod (401). The second brackets (405) are fixedly connected to the pressure-bearing assembly (7). A flipping block plate (402), a fixed block plate (403), and a torsion spring (404) are rotatably connected to the outside of the fixed rod (401). The fixed block plate (403) is fixedly connected to the pressure-bearing assembly (7). The flipping block plate (402) presses tightly against the ejector assembly (10) under the elastic action of the torsion spring (404). A stop block (502) is fixedly connected to the bottom of the lower push air seal block (501). The lower push air seal block (501) and the stop block (502) are connected to the bottom of the lower push air seal block (501). All blocks (502) are slidably connected to the lowered exhaust chamber (1023). The stop block (502) can completely seal the one-way hole (1027). An exhaust one-way valve (503) is sealed inside the one-way hole (1027). A first intake one-way valve (504) is sealed inside the outer through hole (1026). Two first built-in one-way valves (505) are sealed inside the venting elongated hole (1017). The first built-in one-way valve (505) is located between the one-way holes (1027) and the other first built-in one-way valve (505) is located between the one-way holes (1027) and the control hole (1028).

5. A leak-proof hydraulic cylinder according to claim 2, characterized in that: The accumulator head (601) is fixedly connected to the top of the thin rod (104), the pressure sensor (11) is fixedly connected to the top of the accumulator head (601), the control hole (1028) is sealed with a second air intake check valve (602), the external through hole (1026) inside the accumulator chamber (1025) is sealed with a control valve (603), the pressure-bearing assembly (7) includes a hydraulic force-bearing block (701), the hydraulic force-bearing block (701) is provided with a first clearance hole (702) inside, the first clearance hole... The hole (702) is provided with a second stage warning element (9). The bottom of the hydraulic force block (701) is provided with a relief groove (703). The relief groove (703) is fixedly connected with a plug (704). The bottom of the hydraulic force block (701) is fixedly connected with a connecting block (705). The connecting block (705) is offset from the relief groove (703). The bottom of the connecting block (705) is fixedly connected with an elastic force block (706). The surface of the elastic force block (706) is provided with a second T-shaped groove (707).

6. A leak-proof hydraulic cylinder according to claim 5, characterized in that: The first stage warning component (8) includes a second spring (801), a first warning block (802) is fixedly connected to the outer side of the second spring (801), and the inner side of the second spring (801) is fixedly connected to the pop-up assembly (10). The second stage warning component (9) includes a third spring (901), a second warning block (902) is fixedly connected to the outer side of the third spring (901), and the inner side of the third spring (901) is fixedly connected to the inner wall of the first clearance hole (702).

7. A leak-proof hydraulic cylinder according to claim 6, characterized in that: The pop-out assembly (10) includes a pop-out block (1001), which is slidably connected to the inner wall of the pressure measuring cylinder hole (1016). A second clearance hole (1002) is provided at the bottom of the pop-out block (1001), and the inner wall of the second clearance hole (1002) is fixedly connected to the inner side of the second spring (801). A T-shaped block (1003) is fixedly connected to the bottom of the pop-out block (1001), and the T-shaped block (1003) is located at the bottom of the second clearance hole (1002). 03) Sliding connection with the second T-slot (707), the T-block (1003) can be slidably connected with the first T-slot (1014), the pop-out block (1001) has a card hole (1004) in the middle, the insert block (704) can be locked inside the card hole (1004), the pop-out block (1001) is fixedly connected to the side of the card block (1005), the card block (1005) is located directly above the card hole (1004), and the card block (1005) can be locked inside the clearance groove (703).

8. A leak-proof hydraulic cylinder according to claim 2, characterized in that: The upper push air sealing block (1201) is slidably and sealingly connected to the inner wall of the upper exhaust chamber (1024). The top of the upper push air sealing block (1201) is fixedly connected to a push block (1202). The lower right corner of the push block (1202) is provided with an air vent (1203). The top of the push block (1202) is fixedly connected to a push plate (1204). The top of the push plate (1204) is fixedly connected to a telescopic sealing block (1205). The top of the telescopic sealing block (1205) is fixedly connected to a ring (1022). When the telescopic sealing block (1205) is fully extended, it can completely seal the second built-in one-way valve (1206). The one-way hole (1027) is sealed and connected to the second built-in one-way valve (1206).

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