A tool for assembling a bushing for a natural gas compressor main crosshead

Abstract

The utility model discloses a kind of tool for crosshead assembly bushing of natural gas compressor host, including center shaft, adjusting mechanism, upper clamping plate, top seat, base, spring, support, the bottom of support is provided with lower clamping plate, upper clamping plate and lower clamping plate form the clamping space of bushing together outside support, the upper end of support and the outside of top seat are movably hinged, the lower end of support and the outside of base are movably hinged, base realizes elastic support by spring, top seat is adjusted limit by adjusting mechanism, can change the outer diameter size of support support according to bushing inner diameter, flexible use, suitable for various models crosshead bushing assembly, convenient to use, can guarantee the accuracy of installation process, reduce the safety risk that worker is scalded frostbite in operation process, can effectively save cost, improve efficiency.

Description

Technical Field

[0001] This utility model relates to the field of natural gas compressor installation technology. More specifically, this utility model relates to a tooling for assembling bushings for the crosshead of a natural gas compressor main unit. Background Technology

[0002] Natural gas compressor main units are crucial energy equipment in the industrial sector, and the crosshead, as a vital component of the compressor main unit, significantly impacts the compressor's performance and stability. Crosshead tooling, as a key tool in crosshead manufacturing and maintenance, is essential for improving compressor performance and reducing energy consumption. A natural gas compressor mainly consists of three parts: the drive mechanism (crankshaft, bearings, connecting rod, crosshead, pulleys or couplings, etc.), the working mechanism (cylinders, pistons, valves, etc.), and the compressor body. The drive mechanism is a crank-connecting rod mechanism that converts the rotational motion of the crankshaft into the reciprocating motion of the crosshead. The crosshead connects the piston and connecting rod and serves a guiding function. Closed crossheads, where the small end of the connecting rod is housed within the crosshead body, are widely used in compressors. Crosshead installation encounters many obstacles, making lifting equipment unsuitable. Furthermore, crossheads are mostly made of metal, resulting in relatively heavy weights, especially in large units where crossheads can weigh tens of kilograms, making installation very strenuous for workers.

[0003] Currently, there are many types of tooling used for crosshead bushings. However, the required tooling dimensions are not the same for different sizes of bushings. Therefore, it is necessary to design a specific crosshead bushing improvement method for each type of bushing. In other words, a crosshead assembly structure is designed for different bushings. This is difficult to find during use, resulting in inconvenience in retrieval and management, and also has a certain impact on work efficiency. Summary of the Invention

[0004] The purpose of this utility model is to provide a tooling for assembling bushings for crossheads of natural gas compressor main units, so as to solve the technical problem that the tooling structure for assembling bushings for crossheads in the prior art cannot adapt to changes in bushing size.

[0005] To achieve these objectives and other advantages according to this utility model, a tooling for assembling bushings for a crosshead of a natural gas compressor main unit is provided. The tooling includes a vertically arranged central shaft and an adjusting mechanism, a top seat, a base, and a spring, which are coaxially fitted and slidably connected to the central shaft from top to bottom. The upper end of the adjusting mechanism is temporarily fixed to the central shaft, and the lower end is connected to an upper clamping plate radially outward. The bottom of the adjusting mechanism limits the top of the top seat. A limiting element is installed on the central shaft between the top seat and the base to limit the bottom of the top seat. A bracket is provided on the outside of the central shaft, with its upper end hinged to the outside of the top seat and its lower end hinged to the outside of the base. The top of the spring is connected to the bottom of the base for elastic support. A lower clamping plate is connected to the bottom of the bracket radially outward along the central shaft. The upper and lower clamping plates together form a clamping space for the bushing on the outside of the bracket.

[0006] Preferably, the adjusting mechanism includes a slip ring sleeved and slidably connected to the outside of the central shaft. The lower side end of the slip ring is connected to the upper clamping plate radially outward. The upper side end of the slip ring has a radially penetrating lower screw hole. The lower screw holes are evenly spaced along the circumference of the slip ring. An adjusting bolt is screwed into each lower screw hole. After multiple adjusting bolts are screwed into the central shaft, they abut against each other to temporarily fix the adjusting mechanism at the corresponding position on the central shaft and limit the position of the lower top seat.

[0007] Preferably, an upper pressure rod is also sleeved and slidably connected on the central shaft. The upper pressure rod is located on the upper side of the adjustment mechanism and is arranged perpendicular to the central shaft.

[0008] Preferably, a limiting ball is threadedly connected to the top of the central shaft, and the outer diameter of the limiting ball is larger than the outer diameter of the central shaft.

[0009] Preferably, the upper pressure rod has a threaded hole extending radially through the center axis in the middle, and an adjusting screw is screwed into the threaded hole facing the center axis.

[0010] Preferably, the upper clamping plate is configured as a clamping plate structure, and multiple clamping plates are symmetrically arranged along the axis. The bottom of the end of the clamping plate away from the central axis has a clamping groove extending outward. The part of the lower clamping plate extending out of the bracket and the clamping groove together form a clamping space for the bushing.

[0011] Preferably, the bracket includes a plurality of support blocks symmetrically arranged outside the central axis. The support blocks extend along an axis parallel to the central axis. A first groove is formed on the side of the support block facing the central axis. A second groove is formed vertically through the outer side of the top seat. A third groove is formed vertically through the outer side of the base. The number of second and third grooves is the same as the number of first grooves. The second and third grooves are arranged in a one-to-one correspondence and are located in the same vertical direction. An upper connecting rod is movably hinged between the upper end of each second groove and the corresponding first groove. The upper connecting rod is inclined outward and downward relative to the central axis. A lower connecting rod is movably hinged between the lower end of each third groove and the corresponding first groove. The lower connecting rod is inclined outward and upward relative to the central axis.

[0012] This utility model has at least the following beneficial effects: The tooling for assembling bushings for the crosshead of the natural gas compressor main unit includes a central shaft, an adjusting mechanism, an upper clamping plate, a top seat, a base, a spring, and a bracket. A lower clamping plate is provided at the bottom of the bracket. The upper and lower clamping plates together form a clamping space for the bushing on the outside of the bracket. The upper end of the bracket is movably hinged to the outside of the top seat, and the lower end of the bracket is movably hinged to the outside of the base. The base is elastically supported by a spring. The top seat is adjusted and limited by the adjusting mechanism. The outer diameter of the bracket can be changed according to the inner diameter of the bushing. It is flexible and suitable for assembling various models of crosshead bushings. It is easy to use, ensures the accuracy of the installation process, reduces the safety risk of burns and frostbite to workers during operation, and can effectively save costs and improve efficiency.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention. Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the structure of the top seat of this utility model; Figure 5 This is a schematic diagram of the structure of the crosshead bushing of the natural gas compressor main unit of this utility model.

[0015] Explanation of reference numerals in the accompanying drawings: 1. Central shaft, 2. Adjustment mechanism, 3. Upper clamping plate, 4. Top seat, 5. Base, 6. Spring, 7. Limiting component, 8. Bracket, 9. Lower clamping plate, 10. Slip ring, 11. Adjusting bolt, 12. Upper pressure rod, 13. Limiting ball, 14. Clamping groove, 15. Support block, 16. Second groove, 17. Third groove, 18. Upper connecting rod, 19. Lower connecting rod, 20. Crosshead, 21. Bushing. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0017] In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figures 1-5 As shown, this utility model discloses a tooling for assembling a bushing for a crosshead of a natural gas compressor main unit. It includes a vertically arranged central shaft 1 and, from top to bottom, an adjusting mechanism 2, a top seat 4, a base 5, and a spring 6, all coaxially mounted and slidably connected to the central shaft 1. The upper end of the adjusting mechanism 2 is temporarily fixed to the central shaft 1, and the lower end is connected radially outward to an upper clamping plate 3. The bottom of the adjusting mechanism 2 limits the top of the top seat 4. A limiting component 7 is installed on the central shaft 1 between the top seat 4 and the base 5 to limit the bottom of the top seat 4. A bracket 8 is provided on the outside of the central shaft 1. The upper end of the bracket 8 is movably hinged to the outside of the top seat 4, and the lower end of the bracket 8 is movably hinged to the outside of the base 5. The top of the spring 6 is connected to the bottom of the base 5 for elastic support. The bottom of the bracket 8 is connected radially outward to a lower clamping plate 9. The upper clamping plate 3 and the lower clamping plate 9 together form a clamping space for the bushing on the outside of the bracket 8.

[0019] The outer end of the lower clamping plate 9 does not extend beyond the bottom outer edge of the bushing. The bracket 8 is located outside the central shaft 1, and its upper end is connected to the top seat 4 by a connecting rod, and its lower end is connected to the base 5 by a connecting rod. As the main frame structure of the outer support bushing, the bracket 8 is connected by a movable hinge, allowing the upper and lower ends of the bracket 8 to change their distance from the central shaft 1 under the action of the hinge, thus accommodating bushings of different inner diameters and facilitating the removal or clamping of the bushing. The central shaft 1 is made of stainless steel. The adjusting mechanism 2, the top seat 4, the base 5, and the spring 6 are slidably connected on the central shaft 1. The extension and retraction direction of the spring 6 is parallel to the axial direction of the central shaft 1. The base 5 has a certain weight and is pressed against the top of the spring 6. The limiting part 7, such as the limiting screw, limits the bottom of the top seat 4 to prevent the top seat 4 from sliding too far downward. Before use, the adjusting mechanism 2 is in a relaxed and slidable state relative to the central shaft 1, and does not limit the top seat 4 on the central shaft 1, nor interfere with the up and down movement of the top seat 4 relative to the central shaft 1.

[0020] Before assembly, the upper clamping plate 3 and the adjusting mechanism 2 move upward synchronously, so that the outer diameter of the bracket 8 is smaller than the inner diameter of the bushing 21. Then, holding the central shaft 1, the bracket 8 is inserted into the inside of the bushing 21, with the lower clamping plate lower than the bottom of the bushing 21. Then, the upper clamping plate 3 and the top seat 4 are pressed down relative to the central shaft 1, and the bracket 8 is opened up until it abuts against the inside of the bushing 21 under the action of the movable hinge. At the same time, the lower clamping plate 9 at the bottom of the bracket 8 abuts against the bottom of the bushing 21, and the upper clamping plate 3 on the upper side abuts against the upper end of the bushing 21. As the bracket 8 moves down, it drives the base 5 to press down the spring 6. 6. Apply a counterforce to the base 5, causing it to open the lower end of the hinged bracket 8. Then tighten the adjusting mechanism 2 to limit the upper side of the top seat 4 and the clamping plate. Relying on the lower spring 6, the base 5 is kept open at the lower end of the bracket 8. At this time, the bushing is stably held by the upper clamping plate 3, the outer wall of the bracket 8, and the lower clamping plate 9. Lift the entire structure and place the bushing onto the compressor crosshead 20 bushing cavity, aligning the inner walls of the upper and lower ends of the crosshead bushing so that the center lines are at the same horizontal position, completing the crosshead bushing assembly process. Similarly, after installing the bushing, loosen and move the adjusting mechanism 2 upward to relax the bracket 8. Then lift the top seat 4 or squeeze the bracket 8 to completely remove the lower clamping plate 9 from the bottom of the bushing and place it inside the bushing. Finally, lift the central shaft 1 as a whole to complete the tool retrieval.

[0021] This utility model discloses a tooling for assembling bushings on the crosshead of a natural gas compressor main unit. It includes a central shaft 1, an adjusting mechanism 2, an upper clamping plate 3, a top seat 4, a base 5, a spring 6, and a bracket 8. A lower clamping plate 9 is installed at the bottom of the bracket 8. The upper clamping plate 3 and the lower clamping plate 9 together form a clamping space for the bushing on the outside of the bracket 8. The upper end of the bracket 8 is hinged to the outside of the top seat 4, and the lower end of the bracket 8 is hinged to the outside of the base 5. The base 5 is elastically supported by the spring 6. The top seat 4 is adjusted and limited by the adjusting mechanism 2. The outer diameter of the bracket 8 can be adjusted according to the inner diameter of the bushing, allowing for flexible use. It is suitable for assembling various types of crosshead bushings, is easy to use, ensures accuracy during installation, reduces the safety risk of burns and frostbite to workers during operation, effectively saves costs, and improves efficiency.

[0022] In another technical solution, such as Figure 1-3 As shown, the adjustment mechanism 2 includes a slip ring 10 sleeved and slidably connected to the outside of the central shaft 1. The lower side end of the slip ring 10 is connected to the upper clamping plate 3 radially outward. The upper side end of the slip ring 10 is radially provided with a lower screw hole. The lower screw holes are evenly spaced along the circumference of the slip ring 10. An adjustment bolt 11 is screwed into each lower screw hole. After the multiple adjustment bolts 11 are screwed into the central shaft 1, they abut against each other to temporarily fix the adjustment mechanism 2 at the corresponding position on the central shaft 1 and limit the position of the lower top seat 4.

[0023] Multiple adjusting bolts 11 are screwed into the central shaft 1, and pressure is continued to be applied towards the central shaft 1. Under the action of friction, they are temporarily fixed in the position of the central shaft 1 to prevent the top seat 4 from moving upward and the spring 6 from moving the base 5 downward, thereby controlling the position of the bracket 8 and thus controlling the opening size of the bracket 8 to stabilize the clamping bushing.

[0024] In another technical solution, such as Figure 1-3 As shown, an upper pressure rod 12 is also sleeved and slidably connected on the central shaft 1. The upper pressure rod 12 is located on the upper side of the adjustment mechanism 2 and is set perpendicular to the central shaft 1. The upper pressure rod 12 is set to facilitate manual operation to apply pressure downward toward the upper clamping plate 3 and the top seat 4.

[0025] In another technical solution, such as Figure 1-3 As shown, a limiting ball 13 is threadedly connected to the top of the central shaft 1. The outer diameter of the limiting ball 13 is larger than the outer diameter of the central shaft 1. By unscrewing the limiting ball 13, the upper pressure rod 12, the adjusting mechanism 2, the top seat 4, the base 5, etc. can be taken out upwards. The upper clamping plate 3 is detachably connected to the adjusting mechanism 2. By screwing on the limiting ball 13, the structure on the central shaft 1 is limited to prevent it from coming off and to facilitate the lifting of the central shaft 1.

[0026] In another technical solution, such as Figure 1-3As shown, the upper pressure rod 12 has a threaded hole extending radially through its center along the central axis 1, and an adjusting screw is screwed into the threaded hole facing the central axis 1. When the upper pressure rod 12 is not in use, it is slid upward relative to the central axis 1, and then the adjusting screw is tightened through the threaded hole for temporary fixation, thus avoiding interference with tool retrieval after the bushing is installed.

[0027] In another technical solution, such as Figure 1-3 As shown, the upper clamping plate 3 is configured as a clamping plate structure, and multiple clamping plates are symmetrically arranged along the axis. The bottom of the clamping plate away from the central axis 1 has a clamping groove 14. The depth of the clamping groove 14 can be greater than the thickness of the bushing. The upper clamping plate 3 is above the bushing and does not interfere with the lifting and retraction of the support 8. The part of the lower clamping plate 9 that extends out of the support 8 and the clamping groove 14 together form a clamping space for the bushing.

[0028] In another technical solution, such as Figure 1-3 As shown, the bracket 8 includes multiple support blocks 15 symmetrically arranged outside the central axis 1. The support blocks 15 extend along an axis parallel to the central axis 1. A first groove is formed on the side of the support block 1 facing the central axis 1. A second groove 16 is formed vertically through the outer side of the top seat 4. A third groove 17 is formed vertically through the outer side of the base 5. The number of second grooves 16 and third grooves 17 is the same as the number of first grooves. The second grooves 16 and third grooves 17 are arranged in the same vertical direction in a one-to-one correspondence. An upper connecting rod 18 is movably hinged between the upper end of each second groove 16 and the corresponding first groove. The upper connecting rod 18 is inclined outward and downward relative to the central axis 1. A lower connecting rod 19 is movably hinged between the lower end of each third groove 17 and the corresponding first groove. The lower connecting rod 19 is inclined outward and upward relative to the central axis 1.

[0029] The first and second grooves 16 correspond to the positions of the upper connecting rod 18, and the first and third grooves 17 correspond to the positions of the lower connecting rod 19. Each groove has symmetrical rotating holes on its side walls, through which a rotating shaft is inserted. The rotating shaft is fixed to or integrally formed with the upper connecting rod 18 or the lower connecting rod 19, or a bearing hole is formed through the end of the upper connecting rod 18 or the lower connecting rod 19. A pin or other structural component is inserted into both the rotating hole and the bearing hole. A limit nut or other structural component with a diameter larger than the rotating hole is screwed onto the tail end of the pin. The tightness is adjusted as needed to ensure that the upper connecting rod 18 or the lower connecting rod 19... The upper connecting rod 18 and the lower connecting rod 19 are tilted in opposite directions relative to the central axis 1. Pressing down on the upper connecting rod 18 makes its position closer to the horizontal direction, thereby opening the bracket 8. The lower connecting rod 19, under the action of the spring 6 restoring its deformation upward, tends to be horizontal, thereby opening the bracket 8. Lifting the top seat 4 upward will pull the upper connecting rod 18 upward, tending to be vertical, thereby pulling the support block 15 of the bracket 8 upward and moving it towards the central axis 1. This pulls the lower connecting rod 19 upward, thereby causing the entire bracket 8 to contract towards the central axis 1.

[0030] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the drawings shown and described herein.

Claims

1. A tooling for assembling a bushing in the crosshead of a natural gas compressor main unit, characterized in that, It includes a vertically arranged central shaft and an adjustment mechanism, a top seat, a base, and a spring, which are coaxially sleeved and slidably connected to the central shaft from top to bottom. The upper end of the adjustment mechanism is temporarily fixed to the central shaft, and the lower end is connected to an upper clamping plate radially outward. The bottom of the adjustment mechanism limits the top of the top seat. A limiting component is installed on the central shaft between the top seat and the base to limit the bottom of the top seat. A bracket is provided on the outside of the central shaft. The upper end of the bracket is movably hinged to the outside of the top seat, and the lower end of the bracket is movably hinged to the outside of the base. The top of the spring is connected to the bottom of the base for elastic support. The bottom of the bracket is connected to a lower clamping plate radially outward along the central shaft. The upper and lower clamping plates together form a clamping space for the bushing on the outside of the bracket.

2. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 1, characterized in that, The adjustment mechanism includes a slip ring sleeved and slidably connected to the outside of the central shaft. The lower side end of the slip ring is connected to the upper clamping plate radially outward. The upper side end of the slip ring has a radially penetrating lower screw hole. The lower screw holes are evenly spaced along the circumference of the slip ring. An adjusting bolt is screwed into each lower screw hole. After multiple adjusting bolts are screwed into the central shaft, they abut against each other to temporarily fix the adjustment mechanism at the corresponding position on the central shaft and limit the position of the lower top seat.

3. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 1, characterized in that, An upper pressure rod is also sleeved and slidably connected on the central shaft. The upper pressure rod is located on the upper side of the adjustment mechanism and is set perpendicular to the central shaft.

4. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 3, characterized in that, A limiting ball is threadedly connected to the top of the central shaft, and the outer diameter of the limiting ball is larger than the outer diameter of the central shaft.

5. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 3, characterized in that, The upper pressure rod has a threaded hole extending radially through the center axis in the middle, and an adjusting screw is screwed into the threaded hole facing the center axis.

6. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 1, characterized in that, The upper clamping plate is configured as a clamping plate structure, and multiple clamping plates are symmetrically arranged along the axis. The bottom of the end of the clamping plate away from the central axis has a clamping groove. The part of the lower clamping plate that extends out of the bracket and the clamping groove together form a clamping space for the bushing.

7. The tooling for assembling the bushing of the crosshead of a natural gas compressor main unit as described in claim 1, characterized in that, The bracket includes multiple support blocks symmetrically arranged outside the central axis. The support blocks extend along an axis parallel to the central axis. A first groove is formed on the side of the support block facing the central axis. A second groove is formed vertically through the outer side of the top seat. A third groove is formed vertically through the outer side of the base. The number of second and third grooves is the same as the number of first grooves, and the second and third grooves are arranged in the same vertical direction in a one-to-one correspondence. An upper connecting rod is movably hinged between the upper end of each second groove and the corresponding first groove. The upper connecting rod is inclined downward relative to the central axis. A lower connecting rod is movably hinged between the lower end of each third groove and the corresponding first groove. The lower connecting rod is inclined upward relative to the central axis.

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