Anti-twisting and anti-impact hydraulic cylinder special for under-pressure operation machine

Abstract

The utility model relates to the technical field of hydraulic cylinders, and discloses an anti-twist and anti-impact hydraulic cylinder special for an under-pressure operation machine, which comprises a cylinder sleeve, a piston rod is slidably connected to the inner wall of the cylinder sleeve, a front shell is fixedly connected to the right end of the outer wall of the cylinder sleeve, and a piston is fixedly connected to the left end of the outer wall of the piston rod. A first mounting groove is formed in the left side of the outer wall of the piston, a wear-resisting ring is fixedly connected to the outer wall of the first mounting groove, a second mounting groove is formed in the right side of the outer wall of the piston, a first sealing ring is fixedly connected to the outer wall of the second mounting groove, a cushion is fixedly connected to the right side of the piston, and the inner wall of the cushion is fixedly connected to the outer wall of a piston rod. And the right end of the piston rod is in threaded connection with a locknut. According to the anti-twisting cushion, due to the matched design of the wear-resisting ring and the first sealing ring, the friction consumption to the cushion is reduced, and when the cushion is subjected to high pressure, the pressing force of the cushion on the piston rod is increased, so that the anti-twisting effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder for pressurized working machines with anti-torsion and anti-impact features. Background Technology

[0002] Live drilling and workover technology allows drilling and workover operations to be carried out without the need for well control or blowout, helping to protect reservoir productivity and the environment from damage. It is a key technology for oil and gas development. The live drilling rig is the core equipment of this technology and is suitable for running and pulling tubing strings under pressure in oil, water and gas wells. It is equipped with an operating platform and a hydraulic control system. Lifting, connecting, raising and lowering operations are performed by adjusting the flow of hydraulic cylinders. During operation, one end of the hydraulic cylinder is fixed and the other end is connected to the piston rod through a rigid crossbeam to ensure synchronous lifting and lowering, thus realizing the running and pulling of tubing strings.

[0003] A search revealed Chinese Patent Publication No. CN213392948U, which discloses an impact-resistant hydraulic cylinder, comprising a cover and a protective shell. The cover has a retaining ring at its upper end and a sealing ring installed inside. A main body is located at the lower end of the cover, and a piston is installed inside the main body. A telescopic rod is installed at the upper end of the piston. The protective shell is located around the lower end of the cover, and an oil inlet is located at its left end, connected to the main body via a pipe. An air outlet is installed at the right end of the protective shell, and a fixed base is located at its lower end. Limit seats are provided at both ends of the fixed base, and a bearing is installed at the upper end of the base. Compared with existing ordinary hydraulic cylinders, this impact-resistant hydraulic cylinder significantly improves the overall performance of the hydraulic cylinder while adding structural features. The improved hydraulic cylinder has an internal angle rotation adjustment structure and a protective structure, effectively meeting user needs. To prevent the piston rod from twisting, higher pressure increases the clamping force of the seat on the piston rod, thereby enhancing the anti-twist effect. However, this also leads to increased wear on the seat. Therefore, a special hydraulic cylinder for pressurized machines with anti-twist and anti-impact features is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a special hydraulic cylinder for pressurized work machines with anti-torsion and anti-impact features, aiming to improve the problem of accelerated seat wear in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a special hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact features, comprising a cylinder liner, a piston rod slidably connected to the inner wall of the cylinder liner, a front shell fixedly connected to the right end of the outer wall of the cylinder liner, a piston fixedly connected to the left end of the outer wall of the piston rod, an installation groove 1 formed on the left side of the outer wall of the piston, a wear-resistant ring fixedly connected to the outer wall of the installation groove 1, an installation groove 2 formed on the right side of the outer wall of the piston, a sealing ring 1 fixedly connected to the outer wall of the installation groove 2, a seat fixedly connected to the right side of the piston, the inner wall of the seat fixedly connected to the outer wall of the piston rod, an anti-loosening nut threadedly connected to the right end of the piston rod, and a sealing mechanism provided on the right side of the front shell.

[0006] The above technical solution involves installing and fixing the piston using a piston rod and an anti-loosening nut. To ensure the contact area between the seat cushion and the piston rod surface, the seat cushion is thickened and lengthened. At the same time, a wear-resistant ring and a sealing ring are added to the surface of the piston to improve the protection of the seat cushion and prevent severe wear. In addition, the higher pressure will increase the clamping force of the seat cushion on the piston rod, thereby enhancing the anti-torsion effect.

[0007] As a further description of the above technical solution:

[0008] A sealing cover is fixedly connected to the right side of the sealing mechanism. A screw hole 1 is provided around the right side of the front housing. A screw hole 2 is provided around the right side of the sealing cover. Reinforcing bolts are threaded onto the inner walls of multiple screw holes 2. A locking washer is fixedly connected to the left side of the inner wall of the sealing cover. A rod seal is fixedly connected to the right end of the outer wall of the piston rod. A dustproof ring is fixedly connected to the right side of the inner wall of the sealing cover.

[0009] The above technical solution improves the sealing effect of the device by using locking washers, rod seals, and dust rings. At the same time, the reinforcing bolt is inserted into the screw hole two, and the sealing cover is fixed by rotation, which facilitates subsequent disassembly.

[0010] As a further description of the above technical solution:

[0011] The sealing mechanism also includes multiple sealing rings II, the inner walls of which are fixedly connected to the right end of the outer wall of the reinforcing bolt.

[0012] The above technical solution improves the protection of the reinforcing bolt surface by using the second sealing ring, preventing moisture from entering the second screw hole and affecting the service life of the reinforcing bolt.

[0013] As a further description of the above technical solution:

[0014] The top of the outer wall of the front shell has a liquid inlet, the right end of the inner wall of the cylinder liner has an annular groove, the top of the outer wall of the cylinder liner has a liquid inlet, and the left end of the inner wall of the cylinder liner has an annular groove.

[0015] The above technical solution allows liquid to be injected into the cylinder liner through inlet one and inlet two, thereby realizing the extension and retraction of the piston rod. The liquid is also uniformly introduced through annular groove one and annular groove two, which can guide the liquid and reduce impact.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the second sealing ring is slidably connected to the inner wall of the second screw hole, and the multiple second screw holes are arranged at equal intervals.

[0018] Through the above technical solution, the sealing ring fits into the inner wall of the second screw hole, thus achieving a tight seal for the second screw hole.

[0019] As a further description of the above technical solution:

[0020] The piston rod has a screw hole three at its right end, and a rod bolt is connected to the internal thread of the screw hole three.

[0021] The above technical solution involves connecting three pairs of rod bolts through screw holes, which facilitates subsequent device installation.

[0022] As a further description of the above technical solution:

[0023] A sealing plate is fixedly connected to the outer wall of the rod bolt, and the inner diameter of the screw hole three is matched with the diameter of the rod bolt.

[0024] Through the above technical solution, the sealing plate helps to seal the screw hole three, preventing dust and liquid from entering.

[0025] As a further description of the above technical solution:

[0026] A rubber ring is slidably connected to the right side of the outer wall of the piston rod, and the left side of the rubber ring is fixedly connected to the right side of the front housing.

[0027] The above technical solution, with the rubber ring positioned between the front housing and the piston rod, effectively reduces the impact from buffering.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the wear-resistant ring and sealing ring 1 are designed to reduce frictional wear on the seat cushion. When the seat cushion is subjected to high pressure, the pressing force of the seat cushion on the piston rod will increase, thereby enhancing the anti-torsion effect. The anti-loosening nut is screwed in through the rear end of the piston rod to strengthen the piston's firmness. Liquid is injected into the cylinder liner through inlet 1 and inlet 2 respectively, and the liquid is uniformly introduced through annular groove 1 and annular groove 2, which can guide the liquid and reduce impact.

[0030] 2. In this utility model, the front shell is installed and fixed by inserting the reinforcing bolt into the corresponding screw hole two and rotating the reinforcing bolt so that its end threadedly connects into the screw hole one. A locking washer, a rod seal and a dustproof ring are provided between the sealing cover and the piston rod. These sealing components can effectively prevent dust from entering and liquid from leaking. By unscrewing the reinforcing bolt, the locking washer, rod seal and dustproof ring can be easily removed, thus facilitating the replacement of the sealing components. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of a hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact features, as proposed in this utility model.

[0032] Figure 2 This is a perspective view of a hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact features, as proposed in this utility model.

[0033] Figure 3 This is a schematic diagram of the piston rod of a hydraulic cylinder for a pressurized machine that has anti-torsion and anti-impact properties, as proposed in this utility model.

[0034] Figure 4 This is a schematic diagram of the sealing mechanism of a hydraulic cylinder for a pressurized machine that has anti-torsion and anti-impact properties, as proposed in this utility model.

[0035] Figure 5 This is a side view of a hydraulic cylinder for a pressurized machine that features anti-torsion and anti-impact properties, as proposed in this utility model.

[0036] Legend:

[0037] 1. Cylinder liner; 2. Piston rod; 3. Front housing; 4. Piston; 5. Seat; 6. Mounting groove one; 7. Wear ring; 8. Mounting groove two; 9. Sealing ring one; 10. Anti-loosening nut; 11. Liquid inlet one; 12. Annular groove one; 13. Liquid inlet two; 14. Annular groove two; 15. Sealing mechanism; 1501. Sealing cover; 1502. Screw hole one; 1503. Reinforcing bolt; 1504. Locking washer; 1505. Rod seal; 1506. Dustproof ring; 1507. Sealing ring two; 1508. Screw hole two; 16. Screw hole three; 17. Rod bolt; 18. Sealing plate; 19. Rubber ring. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact features, comprising a cylinder liner 1, a piston rod 2 slidably connected to the inner wall of the cylinder liner 1, and a front shell 3 fixedly connected to the right end of the outer wall of the cylinder liner 1. The cylinder liner 1 and the front shell 3 are integrally formed. The piston rod 2 can slide back and forth on the inner wall of the cylinder liner 1. A piston 4 is fixedly connected to the left end of the outer wall of the piston rod 2. The piston 4 forms two chambers inside the cylinder liner 1. When different amounts of liquid are injected simultaneously, the piston rod 2 extends and retracts under the compression of the piston 4. A mounting groove 6 is provided on the left side of the outer wall of the piston 4, and a wear-resistant ring 7 is fixedly connected to the outer wall of the mounting groove 6. A mounting groove 8 is provided on the right side of the outer wall of the piston 4, and a sealing ring 9 is fixedly connected to the outer wall of the mounting groove 8. The wear-resistant ring 7 and the sealing ring 9 are fixedly fixed to the outer wall of the piston 4. A seat 5 is fixedly connected to the right side of the piston 4, and the inner wall of the seat 5 is fixedly connected to... On the outer wall of piston rod 2, the wear-resistant ring 7 and the sealing ring 9 are designed to reduce friction wear on the seat 5. When the seat 5 is subjected to high pressure, the pressing force of the seat on the piston rod will increase, thereby enhancing the anti-torsion effect. The right end of piston rod 2 is threaded with an anti-loosening nut 10. The anti-loosening nut 10 is screwed in through the rear end of piston rod 2 to strengthen the firmness of piston 4. The right side of front shell 3 is provided with a sealing mechanism 15. The top of the outer wall of front shell 3 is provided with a liquid inlet 11. The right end of the inner wall of cylinder liner 1 is provided with an annular groove 12. The top of the outer wall of cylinder liner 1 is provided with a liquid inlet 23. The left end of the inner wall of cylinder liner 1 is provided with an annular groove 24. Liquid is injected into cylinder liner 1 through liquid inlet 11 and liquid inlet 23 respectively, realizing the extension and retraction of piston rod 2. The annular groove 12 and annular groove 24 enable the liquid to enter evenly and guide the liquid, thereby reducing impact.

[0040] Specifically, the inner wall of cylinder liner 1 is designed with a sliding chamber, allowing piston rod 2 to slide smoothly back and forth inside. The right end of the outer wall of cylinder liner 1 is integrally formed and fixedly connected to front shell 3, ensuring structural stability and integrity. The left end of the outer wall of piston rod 2 is fixedly connected to piston 4. Through the movement of piston 4, the interior of cylinder liner 1 is divided into two independent chambers. By injecting different amounts of liquid into these two chambers, the extension and retraction of piston rod 2 under the push of piston 4 can be controlled. The left side of the outer wall of piston 4 is provided with mounting groove 6, in which wear ring 7 is fixedly installed. The right side of the outer wall of piston 4 is provided with mounting groove 8, in which sealing ring 9 is fixedly installed. Wear ring 7 and sealing ring 9 are both fixedly installed. The design of part 9 effectively reduces frictional loss between piston 4 and seat 5. The inner wall of seat 5 is fixedly connected to the outer wall of piston rod 2. When seat 5 is subjected to higher pressure, its clamping force on piston rod 2 will increase accordingly, thereby further enhancing the anti-torsion effect of hydraulic cylinder. In order to strengthen the firmness of piston 4, the right end of piston rod 2 is connected with anti-loosening nut 10 by thread. Anti-loosening nut 10 is screwed in through the rear end of piston rod 2. Liquid is injected into cylinder liner 1 through inlet 11 and inlet 23 to realize the extension and retraction movement of piston rod 2. The design of annular groove 12 and annular groove 24 allows liquid to enter the chamber evenly, effectively guiding liquid flow, thereby reducing the impact force generated when hydraulic cylinder is working.

[0041] Reference Figure 1 , Figure 2 and Figure 5 A sealing cover 1501 is fixedly connected to the right side of the sealing mechanism 15. Screw holes 1502 are provided around the right side of the front housing 3. The sealing cover 1501 is a component used to seal the front end of the front housing 3. Screw holes 1508 are provided around the right side of the sealing cover 1501. Reinforcing bolts 1503 are threaded onto the inner walls of multiple screw holes 1508. The entire sealing structure is installed and fixed by inserting the reinforcing bolts 1503 into the corresponding screw holes 1508 and rotating them so that their ends are threaded into the screw holes 1502. A locking washer 1504 is fixedly connected to the left side of the inner wall of the sealing cover 1501. A rod seal 1505 is fixedly connected to the right end of the outer wall of the piston rod 2, and a dustproof ring 1506 is fixedly connected to the right side of the inner wall of the sealing cover 1501. A locking washer 1504, a rod seal 1505, and a dustproof ring 1506 are provided between the sealing cover 1501 and the piston rod 2. These sealing components can effectively prevent dust from entering and prevent leakage. The sealing mechanism 15 also includes multiple sealing rings 1507. The inner walls of the multiple sealing rings 1507 are fixedly connected to the right end of the outer wall of the reinforcing bolt 1503. The outer walls of the sealing rings 1507 are slidably connected to the inner wall of the screw hole 1508. The multiple screw holes 1508 are arranged at equal intervals.

[0042] Specifically, multiple screw holes 1502 are evenly distributed around the right edge of the front housing 3. The main function of the sealing cover 1501 is to seal the front end of the front housing 3. To achieve this function, multiple screw holes 1508 are also evenly distributed around the right edge of the sealing cover 1501. The inner walls of these screw holes 1508 are threaded to connect with the reinforcing bolt 1503. By inserting the reinforcing bolt 1503 into the corresponding screw hole 1508 and rotating the reinforcing bolt 1503, the thread at its end connects with the screw hole 1502, thus completing the installation and fixation of the entire sealing structure. To further enhance the sealing effect, a locking washer 1504 is also fixedly connected to the left side of the inner wall of the sealing cover 1501. On the right end of the outer wall of the piston rod 2, a rod seal 1505 is fixedly connected, working in conjunction with the locking washer 1504 to ensure the sealing effect. A dustproof ring 1506 is also fixedly connected to the right side of the inner wall of the sealing cover 1501, located between the sealing rod 1501 and the piston rod 2. It works together with the locking washer 1504 and the rod seal 1505 to effectively prevent dust intrusion and liquid leakage. In addition, the sealing mechanism 15 also includes multiple sealing rings 1507, whose inner walls are fixedly connected to the right end of the outer wall of the reinforcing bolt 1503. The outer walls of the sealing rings 1507 are designed to be slidably connected to the inner wall of the screw holes 1508. To ensure uniform distribution and stable fixation, the multiple screw holes 1508 are arranged at equal intervals.

[0043] Reference Figure 1 , Figure 2 and Figure 4 The piston rod 2 has a screw hole 3 16 at the right end. A rod bolt 17 is connected to the internal thread of the screw hole 3 16. A sealing plate 18 is fixedly connected to the outer wall of the rod bolt 17. The inner diameter of the screw hole 3 16 is matched with the diameter of the rod bolt 17. A rubber ring 19 is slidably connected to the right side of the outer wall of the piston rod 2. The left side of the rubber ring 19 is fixedly connected to the right side of the front shell 3.

[0044] Specifically, a screw hole 3 16 is opened at the right end of the piston rod 2. The inside of the screw hole 3 16 is perfectly connected to the rod bolt 17. The outer wall of the rod bolt 17 is fixedly connected to the sealing plate 18, ensuring the stability and sealing performance of the overall structure. A rubber ring 19 is slidably connected to the right side of the outer wall of the piston rod 2. This rubber ring 19 can not only provide additional sealing effect, but also absorb vibration and impact to a certain extent, protecting the connection part from damage.

[0045] Working principle: First, wear-resistant ring 7 and sealing ring 9 are fixed on the outer wall of piston 4. The cooperation design of wear-resistant ring 7 and sealing ring 9 reduces the friction wear on seat 5. When seat 5 is subjected to high pressure, the pressing force of seat 5 on piston rod increases, thereby enhancing the anti-torsion effect. Anti-loosening nut 10 is screwed in through the rear end of piston rod 2 to strengthen the firmness of piston 4. Liquid is injected into cylinder liner 1 through inlet 11 and inlet 13 to realize the extension and retraction of piston rod 2. The uniform entry of liquid is achieved through annular groove 12 and annular groove 14, which can guide the liquid and reduce impact. And sealing cover 1 501 is a component used to seal the front end of the front housing 3. By inserting the reinforcing bolt 1503 into the corresponding screw hole 1508 and rotating the reinforcing bolt 1503 so that its end threaded into the screw hole 1502, the installation and fixation of the entire sealing structure is completed. A locking washer 1504, a rod seal 1505 and a dust ring 1506 are provided between the sealing cover 1501 and the piston rod 2. These sealing components can effectively prevent dust from entering and leakage from occurring. By unscrewing the reinforcing bolt 1503, the locking washer 1504, the rod seal 1505 and the dust ring 1506 can be easily removed, thus facilitating the replacement of the sealing components.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact features, comprising a cylinder liner (1), characterized in that: The inner wall of the cylinder liner (1) is slidably connected to the piston rod (2). The right end of the outer wall of the cylinder liner (1) is fixedly connected to the front shell (3). The left end of the outer wall of the piston rod (2) is fixedly connected to the piston (4). The left side of the outer wall of the piston (4) is provided with an installation groove (6). The outer wall of the installation groove (6) is fixedly connected to a wear-resistant ring (7). The right side of the outer wall of the piston (4) is provided with an installation groove (8). The outer wall of the installation groove (8) is fixedly connected to a sealing ring (9). The right side of the piston (4) is fixedly connected to a seat (5). The inner wall of the seat (5) is fixedly connected to the outer wall of the piston rod (2). The right end of the piston rod (2) is threaded with an anti-loosening nut (10). The right side of the front shell (3) is provided with a sealing mechanism (15).

2. The hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 1, characterized in that: A sealing cover (1501) is fixedly connected to the right side of the sealing mechanism (15). A screw hole (1502) is provided around the right side of the front shell (3). A screw hole (1508) is provided around the right side of the sealing cover (1501). A reinforcing bolt (1503) is threadedly connected to the inner wall of each of the screw holes (1508). A locking washer (1504) is fixedly connected to the left side of the inner wall of the sealing cover (1501). A rod seal (1505) is fixedly connected to the right end of the outer wall of the piston rod (2). A dustproof ring (1506) is fixedly connected to the right side of the inner wall of the sealing cover (1501).

3. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 1, characterized in that: The sealing mechanism (15) also includes multiple sealing rings (1507), the inner walls of which are fixedly connected to the right end of the outer wall of the reinforcing bolt (1503).

4. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 1, characterized in that: The top of the outer wall of the front shell (3) is provided with a liquid inlet 1 (11), the right end of the inner wall of the cylinder sleeve (1) is provided with an annular groove 1 (12), the top of the outer wall of the cylinder sleeve (1) is provided with a liquid inlet 2 (13), and the left end of the inner wall of the cylinder sleeve (1) is provided with an annular groove 2 (14).

5. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 3, characterized in that: The outer wall of the sealing ring 2 (1507) is slidably connected to the inner wall of the screw hole 2 (1508), and the multiple screw holes 2 (1508) are arranged at equal intervals.

6. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 1, characterized in that: The piston rod (2) has a screw hole three (16) at the right end, and a rod bolt (17) is connected to the screw hole three (16) internally by thread.

7. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 6, characterized in that: A sealing plate (18) is fixedly connected to the outer wall of the rod bolt (17), and the inner diameter of the screw hole (16) is compatible with the diameter of the rod bolt (17).

8. A hydraulic cylinder for a pressurized machine with anti-torsion and anti-impact properties as described in claim 1, characterized in that: A rubber ring (19) is slidably connected to the right side of the outer wall of the piston rod (2), and the left side of the rubber ring (19) is fixedly connected to the right side of the front shell (3).

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