Non-impact liquid drive compressor floating piston dismounting tool

Abstract

The utility model relates to the technical field of compressor maintenance equipment, more particularly to a kind of no-impact liquid drive compressor floating piston dismounting tool, including operating lever and crossbeam;The middle part of the crossbeam is provided with operating hole;The operating lever is screwed in the operating hole and is perpendicular to the crossbeam;The front end of the operating lever is provided with stud in cooperation with piston, to make the stud can be connected in the threaded hole of the piston.Taking out, operating lever extends into cylinder body interior and makes the stud connection in the threaded hole of piston.Subsequently, rotating operating lever makes operating lever gradually move outward, and the length of crossbeam is greater than the inner diameter of cylinder body, and will not enter cylinder body, so that operating lever moves relative to crossbeam can pull out piston.In the process, only need to rotate operating lever, without knocking.

Description

Technical Field

[0001] This utility model relates to the technical field of compressor maintenance equipment, and more specifically, to a tool for disassembling and assembling a floating piston in a non-impact liquid-driven compressor. Background Technology

[0002] Hydraulic compressors, as efficient and reliable fluid compression devices, are widely used in industrial fields such as petrochemicals, natural gas transportation, and energy storage. One of the core components of this type of compressor is the floating piston structure, which compresses and transmits the working medium through reciprocating motion within the cylinder. The floating piston is usually non-rigidly connected to the piston rod, possessing a certain degree of self-adjustment capability. It can adapt to minor deformations or misalignments within the cylinder, helping to reduce the risk of uneven wear and extend the service life of the equipment.

[0003] However, during equipment maintenance and repair, especially when it is necessary to remove the floating piston from inside the cylinder, existing technologies present significant operational complexity and safety hazards. Currently, the disassembly and installation of most floating pistons rely on specialized pullers. The procedure is typically as follows: first, the puller's specialized tooling is connected and fixed to a specific threaded hole or structure on the piston; then, a continuous axial pulling force is applied to gradually pull the piston out of the cylinder, which has an interference fit or significant frictional resistance. During this process, due to scale, corrosion, or "seizing" from long-term operation, the piston and cylinder are often difficult to loosen by pulling force alone. Therefore, maintenance personnel often need to use impact methods such as hammering to strike the stressed parts of the puller, using vibration to break the static friction and thus assist the piston in moving.

[0004] This "knocking" process poses a serious safety threat in certain working environments. In explosion-proof areas such as chemical plants and oil and gas processing plants where flammable and explosive gases or dust are present, any operation that may generate mechanical sparks is strictly prohibited. When using metal tools for hammering, hard metal-to-metal contact is unavoidable, whether between the tool and the puller or between internal parts of the puller assembly. Under significant impact, localized high-temperature sparks or tiny incandescent particles may be generated due to friction or impact. Once these potential ignition sources come into contact with the surrounding explosive atmosphere, they can easily cause serious fires or explosions, resulting in devastating damage to personnel and production facilities.

[0005] Furthermore, existing pull-out disassembly methods themselves have technical limitations. First, the impact load generated by striking is difficult to control precisely, easily leading to mechanical damage to the piston, puller threads, and even cylinder interface, such as thread stripping, component deformation, or cracking. Second, the entire operation is time-consuming and labor-intensive, highly dependent on the operator's experience, resulting in low maintenance efficiency and increased unplanned downtime. Third, for some compressors with special structures or limited space, standard pullers may not be able to be installed smoothly or provide an effective point of force application.

[0006] Therefore, there is an urgent need in this field for a method and specialized tools for disassembling and assembling floating pistons in hydraulically driven compressors. This method must fundamentally eliminate the risk of sparks during operation to meet the stringent safety regulations for explosion-proof areas. Simultaneously, the technical solution should also strive to simplify, controllable, and efficient the operation process, reduce potential damage to the piston and surrounding components, and improve the overall safety and economy of maintenance work. Utility Model Content

[0007] The purpose of this utility model is to provide a non-impact hydraulic compressor floating piston disassembly and assembly tool, which can remove or install the piston from the cylinder body by rotating the operating lever, avoiding the safety hazards caused by knocking.

[0008] The embodiments of this utility model are achieved through the following technical solutions:

[0009] A tool for disassembling and assembling a floating piston in a non-impact hydraulically driven compressor includes an operating rod and a crossbeam; an operating hole is provided in the middle of the crossbeam; the operating rod is threaded to the operating hole and perpendicular to the crossbeam; a stud is provided at the front end of the operating rod to cooperate with the piston, so that the stud can be connected to the threaded hole of the piston.

[0010] Furthermore, both ends of the crossbeam are provided with fixing rods; the fixing rods are configured to fit into the threaded holes of the cylinder head, so that the fixing rods are threadedly connected to the threaded holes of the cylinder head.

[0011] Furthermore, the operating lever includes an outer rod and an inner rod inserted inside the outer rod; the outer rod is threaded to the operating hole; the stud is disposed at one end of the inner rod; and a locking nut is disposed at the other end of the inner rod so that the outer rod is restricted to the outside of the inner rod by the locking nut.

[0012] Furthermore, the fixing rod is a screw; the screw is also equipped with a fixing nut so that the fixing nut presses the crossbeam tightly against the cylinder head.

[0013] Furthermore, thrust bearings are provided at both ends of the outer rod so that both ends of the outer rod abut against the locking nut and one end of the inner rod through the thrust bearings.

[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0015] To remove the piston, the operating lever extends into the cylinder and engages the stud with the piston's threaded hole. Then, rotating the operating lever gradually moves it outwards. Since the crossbeam is longer than the cylinder's inner diameter, it will not enter the cylinder. This allows the operating lever to move relative to the crossbeam, thus pulling the piston out. The process requires only rotating the operating lever; no hammering is necessary.

[0016] The crossbeam is fixed to the cylinder head as a whole by a fixing rod, so that the rotation of the operating rod can also provide force to send the piston into the cylinder body, which can both remove and install the piston.

[0017] The inner rod has a thicker end where the stud is attached, which, together with the lock nut, restrains the outer rod between them, preventing the outer rod from falling off. The inner and outer rods can rotate relative to each other. When the stud is screwed into the piston's threaded hole, the outer rod does not rotate, thus preventing the outer rod from moving relative to the crossbeam while the stud is entering the threaded hole; when the piston is removed or inserted, the outer rod rotates while the inner rod does not rotate, preventing the stud from rotating relative to the threaded hole and separating from the piston due to synchronous rotation of the inner and outer rods, and also preventing the inner rod from causing the piston to rotate and rub against the inner wall of the cylinder.

[0018] When the piston is removed, the outer rod is tightened against the locking nut by the bearing. When the piston is inserted, the outer rod is tightened against one end of the inner rod by the bearing. This reduces the relative rotational resistance between the outer and inner rods, thus preventing the inner and outer rods from rotating synchronously and affecting the insertion or removal of the piston. It also prevents the piston from rotating along with the cylinder wall and causing wear. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the disassembly and assembly tool for this utility model, showing how to disassemble and assemble the piston.

[0020] Figure 2 This is a structural schematic diagram of the disassembly and assembly tool of this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of point a in the middle.

[0022] Figure 4 for Figure 2 Enlarged view of point b in the middle.

[0023] Reference numerals: 1-Crossbeam, 2-Stud, 3-Fixing rod, 4-Outer rod, 5-Inner rod, 6-Locking nut, 7-Cylinder head, 8-Thrust bearing, 9-Cylinder block, 10-Fixing nut, 11-Piston. Detailed Implementation

[0024] like Figures 1-4As shown, this embodiment discloses a disassembly and assembly tool for a non-impact hydraulically driven compressor floating piston 11. Its core structure includes an operating rod and a crossbeam 1. This structural design aims to fundamentally solve the explosion risk and component damage problems caused by the reliance on hammering in traditional pull-out tools. The crossbeam 1 serves as the load-bearing support component of the entire tool. A radially machined internal threaded operating hole is formed in its middle section. The thread specification of this operating hole matches the external thread of the operating rod, allowing the operating rod to be vertically assembled into the operating hole of the crossbeam 1 via a threaded connection, achieving a detachable connection and relative helical movement between the two. A stud 2 is integrally formed at the front end of the operating rod. The thread profile and pitch of the stud 2 are perfectly matched with the pre-set threaded hole on the end face of the floating piston 11, ensuring that the stud 2 can be stably screwed into the threaded hole of the piston 11 to form a reliable connection, avoiding slippage during disassembly and assembly. When removing the floating piston 11, first align the stud 2 at the front end of the operating rod with the exposed threaded hole of the piston 11 at the opening of the cylinder 9. Slowly insert the operating rod into the cylinder 9 and rotate it to fully screw the stud 2 into the threaded hole of the piston 11 and tighten it. Since the length of the crossbeam 1 is greater than the inner diameter of the cylinder 9, the two ends of the crossbeam 1 will naturally be supported at the edge of the port of the cylinder 9 and cannot enter the cylinder 9 to form a rigid support. At this time, the operator only needs to continue to rotate the operating rod. By utilizing the threaded engagement between the operating rod and the operating hole of the crossbeam 1, the operating rod will generate an axial outward displacement during rotation, which will then drive the piston 11 to move outward synchronously through the stud 2, gradually pulling the piston 11 out of the cylinder 9. The entire disassembly process can be completed simply by rotating the operating lever, completely eliminating the hammering step in the traditional method and eliminating the generation of mechanical sparks from the source. It is perfectly suited to the operation requirements of explosion-proof areas such as chemical and oil and gas industries. At the same time, the threaded drive method ensures that the pulling force is evenly applied to the piston 11, effectively avoiding damage to the piston 11 and cylinder 9 caused by impact loads.

[0025] To enable bidirectional disassembly and assembly of the piston 11 using the tool—that is, to allow for precise insertion of the piston 11 while it is being removed—fixing rods 3 are symmetrically arranged at both ends of the crossbeam 1. The number of fixing rods 3 matches the number of pre-set threaded holes on the end face of the cylinder head 7. Typically, two fixing rods 3 are symmetrically arranged on both sides of the operating lever to ensure balanced force on the crossbeam 1. One end of the fixing rod 3 is machined with an external thread, the specification of which is compatible with the internal thread of the threaded hole in the cylinder head 7, allowing the fixing rod 3 to be stably screwed into the threaded hole in the cylinder head 7. During piston 11 installation, the piston 11 is first secured using the stud 2 at the front end of the operating rod. Then, the piston 11 is slowly inserted into the cylinder 9 to the preset position, near the opening. Next, the fixing rods 3 at both ends of the crossbeam 1 are screwed into the corresponding threaded holes in the cylinder head 7, forming a robust integral structure between the crossbeam 1 and the cylinder head 7. At this point, rotating the operating rod converts the rotational motion of the crossbeam 1 into an axial inward thrust, which, through the stud 2, pushes the piston 11 precisely into the installation position in the cylinder 9. This structural design allows the tool to perform both disassembly and installation functions simultaneously, eliminating the need for specialized tools and greatly improving the convenience of maintenance. Furthermore, the rigid connection between the crossbeam 1 and the cylinder head 7 ensures stable transmission of the thrust, preventing uneven wear caused by piston 11 misalignment during installation.

[0026] To further optimize the transmission stability of the operating lever and prevent the stud 2 from loosening from the threaded hole of the piston 11 or the piston 11 from rotating during disassembly and assembly, the operating lever is designed as a nested structure of inner and outer rods 4, including an outer rod 4 and an inner rod 5 inserted inside the outer rod 4. The outer surface of the outer rod 4 is machined with a fully threaded structure, forming a threaded engagement with the internal thread of the operating hole in the middle of the crossbeam 1. The inner hole of the outer rod 4 adopts a smooth hole design, and its inner diameter is slightly larger than the outer diameter of the inner rod 5, allowing the inner rod 5 to rotate freely inside the outer rod 4 without radial wobble. The stud 2 is integrally formed on the front end of the inner rod 5. The rear end of the inner rod 5 is machined with external threads and equipped with a locking nut 6. An annular boss is provided at one end of the inner rod 5 near the stud 2. The diameter of the boss is larger than the inner diameter of the outer rod 4. When the inner rod 5 is inserted into the outer rod 4, the outer rod 4 is axially limited between the annular boss and the locking nut 6 by tightening the locking nut 6 at the rear end. This effectively prevents the outer rod 4 from falling off the inner rod 5, while ensuring that the inner rod 5 and the outer rod 4 can rotate flexibly relative to each other. When connecting the stud 2 and piston 11, the operator only needs to hold the rear end of the inner rod 5 and rotate it. At this time, the outer rod 4 remains stationary under the constraint of the crossbeam 1, ensuring that the stud 2 can be smoothly screwed into the threaded hole of the piston 11. This avoids the operating rod from moving axially in advance due to the synchronous rotation of the outer rod 4, which would affect the connection accuracy. When taking out or inserting the piston 11, the operator holds the outer rod 4 and rotates it. The inner rod 5 remains stationary under the rigid connection constraint of the stud 2 and piston 11. At this time, the outer rod 4 moves axially through the threaded drive and drives the inner rod 5 and piston 11 to move synchronously through the annular boss or locking nut 6. This avoids the relative rotation and loosening of the threaded hole of the stud 2 and piston 11, and also prevents the piston 11 from being damaged by friction with the inner wall of the cylinder 9 due to rotation.

[0027] To enhance the stability of the connection between the crossbeam 1 and the cylinder head 7 and prevent the crossbeam 1 from loosening or shifting during operation, the fixing rod 3 is designed as a fully threaded screw structure, with a fixing nut 10 provided for each screw. After screwing the screw into the threaded hole of the cylinder head 7, continue to rotate the screw until the crossbeam 1 and the end face of the cylinder head 7 are tightly fitted. At this point, screw the fixing nut 10 into the free end of the screw and tighten it, pressing the crossbeam 1 against the end face of the cylinder head 7, forming a double-threaded locking structure. This structural design effectively compensates for the gap in the threaded connection, ensuring that the crossbeam 1 will not experience axial movement or circumferential rotation when bearing the axial force transmitted by the operating rod, providing a reliable support foundation for the stable transmission of the operating rod. Simultaneously, the detachable nut structure facilitates the quick disassembly and storage of the tool, improving its usability.

[0028] To reduce the relative rotational resistance between the inner rod 5 and the outer rod 4 and to prevent them from rotating synchronously due to excessive frictional resistance, thrust bearings 8 are provided at both ends of the outer rod 4. Specifically, at the end of the outer rod 4 near the stud 2, the thrust bearing 8 is fitted between the annular boss of the inner rod 5 and the end face of the outer rod 4; at the end of the outer rod 4 near the locking nut 6, the thrust bearing 8 is fitted between the end face of the outer rod 4 and the locking nut 6, with the inner ring of the thrust bearing 8 tightly fitted with the inner rod 5 and the outer ring tightly fitted with the end face of the outer rod 4. When piston 11 is removed, outer rod 4 rotates clockwise and moves outward axially. At this time, outer rod 4, through the thrust bearing 8 at the rear end, presses against the locking nut 6, causing inner rod 5 and piston 11 to move outward synchronously. The thrust bearing 8 converts the sliding friction between outer rod 4 and locking nut 6 into rolling friction, significantly reducing rotational resistance. When piston 11 is installed, outer rod 4 rotates counterclockwise and moves inward axially. At this time, outer rod 4, through the thrust bearing 8 at the front end, presses against the annular boss of inner rod 5, pushing inner rod 5 and piston 11 inward synchronously. Again, rolling friction reduces resistance. This bearing structure ensures flexible relative rotation between inner rod 5 and outer rod 4, effectively avoiding piston 11 rotational wear caused by synchronous frictional rotation. It also reduces the physical exertion of operators and improves maintenance efficiency.

Claims

1. A tool for disassembling and assembling a floating piston in a shockless hydraulically driven compressor, characterized in that: It includes an operating lever and a crossbeam; the crossbeam has an operating hole in the middle; the operating lever is threaded to the operating hole and perpendicular to the crossbeam; the front end of the operating lever is fitted with a piston and has a stud so that the stud can be connected to the threaded hole of the piston.

2. The tool for disassembling and assembling the floating piston of a non-impact hydraulically driven compressor according to claim 1, characterized in that: Both ends of the crossbeam are provided with fixing rods; the fixing rods are configured to fit into the threaded holes of the cylinder head so that the fixing rods are threadedly connected to the threaded holes of the cylinder head.

3. The non-impact hydraulic compressor floating piston disassembly and assembly tool according to claim 2, characterized in that: The operating lever includes an outer rod and an inner rod inserted inside the outer rod; the outer rod is threaded to the operating hole; a stud is disposed at one end of the inner rod; and a locking nut is disposed at the other end of the inner rod so that the outer rod is restricted to the outside of the inner rod by the locking nut.

4. The non-impact hydraulic compressor floating piston disassembly and assembly tool according to claim 3, characterized in that: The fixing rod is a screw; the screw is also equipped with a fixing nut so that the fixing nut presses the crossbeam tightly against the cylinder head.

5. The tool for disassembling and assembling the floating piston of a non-impact hydraulic compressor according to claim 4, characterized in that: Both ends of the outer rod are provided with thrust bearings, so that both ends of the outer rod abut against the locking nut and one end of the inner rod through the thrust bearings.

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