Combined positive and negative rotation tool

Abstract

The utility model relates to the technical field of mechanical maintenance, in particular to a combined positive and negative rotation tool which is used for dismounting and mounting a piston rod and a crosshead, and a torsion transmission rod is provided with a first end and a second end which are far away from each other; the force application piece is detachably connected with the first end; the screw nail assembly comprises a fixing block fixed to the second end, and a first screw nail and a second screw nail which are fixed to the two sides of the fixing block correspondingly. The first L-shaped spiral nail is detachably fixed in a lifting ring spiral hole of the piston body; the second L-shaped spiral nail is detachably fixed in the other hanging ring spiral hole of the piston body; when the screw nail assembly is arranged between the first L-shaped screw nail and the second L-shaped screw nail and the screw nail assembly is rotated, the first L-shaped screw nail abuts against the first screw nail, and the second L-shaped screw nail abuts against the second screw nail, so that torque is transmitted. The piston rod or the piston can be rotationally disassembled and assembled, operation is convenient, the size can be adjusted, corresponding methods can be adopted according to different working conditions, disassembly is flexible, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical maintenance, in particular to a combined forward and reverse rotating tool. Background Art

[0002] At present, many chemical industries still use reciprocating compressors in production to meet the process's technical requirements such as pressure and flow. The piston rod and crosshead of the reciprocating compressor are still connected by threads. During use, if maintenance, disassembly and replacement are required, special tools are lacking and only conventional tools can be used.

[0003] However, the existing maintenance tools are limited in use. During the disassembly of the piston rod and the crosshead for inspection, only a socket wrench can be used to rotate the piston rod for disassembly. The conventional socket wrench has a single function, and only one tool can be used for piston rods with the same diameter specifications. For example, when disassembling connecting parts with different piston rod diameters, the wrench specifications need to be confirmed on site, and the wrench needs to be replaced frequently, which is inconvenient to operate and affects work efficiency. In addition, the working space at the connection of the components is usually limited and narrow, the wrench is heavy, the operation is clumsy, and it cannot be replaced. In addition, it is inconvenient to disassemble, the rotation stroke is small, time-consuming and labor-intensive, and the work efficiency is low. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a combined forward and reverse rotation tool, which can be used for rotating, disassembling and assembling piston rods or pistons of various specifications. It is easy to operate and has adjustable size. Corresponding methods can be adopted according to different working conditions. Disassembly is more flexible, thereby improving work efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a combined forward and reverse rotation tool for disassembling and installing a piston rod and a crosshead, which includes a torque transmission rod, a force applying member, a screw nail assembly, a first L-shaped screw nail and a second L-shaped screw nail, the torque transmission rod is provided with a first end and a second end which are far away from each other; the force applying member is detachably connected to the first end; the screw nail assembly includes a fixing block fixed to the second end, and a first screw nail and a second screw nail respectively fixed to both sides of the fixing block; the first L-shaped screw nail is detachably fixed in a screw hole of a lifting ring of the piston body; the second The L-shaped screw nail is detachably fixed in another lifting ring spiral hole of the piston body; when the screw nail assembly is placed between the first L-shaped screw nail and the second L-shaped screw nail, and the screw nail assembly is rotated, the first L-shaped screw nail is abutted against the first screw nail, and the second L-shaped screw nail is abutted against the second screw nail to transmit torque; when the screw nail assembly is placed between the first L-shaped screw nail and the second L-shaped screw nail, and moves axially away from the piston body, the first L-shaped screw nail is hung with the first screw nail, and the second L-shaped screw nail is hung with the second screw nail to transmit torque.

[0006] Furthermore, the fixing block is welded to the second end of the torque transfer rod to form a T-shaped structure.

[0007] Furthermore, two opposite end surfaces of the fixing block are respectively provided with internal threaded holes, the first L-shaped screw is connected to the internal threaded hole on one side, and the second L-shaped screw is connected to the internal threaded hole on the other side.

[0008] Furthermore, the first screw nail has a first annular recess, which is used to match the outer diameter of the first L-shaped screw nail, and the second screw nail has a second annular recess, which is used to match the outer diameter of the second L-shaped screw nail.

[0009] Furthermore, the bent end of the first L-shaped screw nail points to a first direction, and the bent end of the second L-shaped screw nail points to a second direction, and the first direction is 180 degrees to the second direction.

[0010] Furthermore, the first screw nail and the second screw nail respectively include at least one size specification.

[0011] Furthermore, the lengths of the first screw and the second screw are in the range of 50 mm to 250 mm.

[0012] Furthermore, the first L-shaped screw nail and the second L-shaped screw nail include three sizes respectively.

[0013] Furthermore, the three sizes include diameters of 8 mm, 10 mm and 12 mm.

[0014] Method of using the above combined forward and reverse rotation tool:

[0015] Step S100, dismantle the compressor crosshead window and loosen the locking nut connecting the piston rod and the crosshead, and at the same time dismantle the compressor cylinder head gland to expose the piston body.

[0016] Step S200: screw two L-shaped screws corresponding to the eye holes of the piston body, namely, a first L-shaped screw and a second L-shaped screw, into the piston body.

[0017] Step S300: hang the T-frame on two screws.

[0018] Step S400: insert the force-applying member into the circular ring of the torque transmission rod, and rotate it counterclockwise 360° continuously to separate the piston rod from the crosshead.

[0019] Step S500: Use a T-bar to hang the L-shaped screw to pull out the piston component.

[0020] Step S600: disassembly is completed.

[0021] Step S700: After replacing the compressor components, the piston body can be screwed back in the reverse direction to connect.

[0022] The beneficial effects of the utility model are as follows: it is specially used for the disassembly and installation of the piston body and the crosshead, is light in weight, easy to carry, and convenient to assemble and operate. It can rotate continuously in the forward and reverse directions of 360°, and can operate on pistons of different diameters of compressor cylinders. It has a wide range of applications, saves time and effort, is easy to carry, and can be quickly disassembled and reassembled, greatly improving work efficiency. The above-mentioned combined forward and reverse rotation tool does not require the wrench to directly contact the piston rod, avoiding collision with the piston rod caused by repeated use of the wrench, and can protect the piston rod to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a combined forward and reverse rotating tool in one embodiment of the utility model;

[0024] Figure 2 This is a structural schematic diagram of a screw nail assembly in one embodiment of the utility model;

[0025] Figure 3 This is a structural schematic diagram of a force-applying member in one embodiment of the utility model;

[0026] In the figure: 100, torque transmission rod, 110, first end, 120, second end,

[0027] 200, force applying member,

[0028] 300, screw nail assembly, 310, fixing block, 311, first screw nail, 3111, first annular recess, 312, second screw nail, 3121, second annular recess,

[0029] 400, the first L-shaped screw,

[0030] 500, the second L-shaped screw,

[0031] 1. Piston body, 11. Lifting ring spiral hole, 12. Lifting ring spiral hole. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] See also Figure 1In one embodiment of the utility model, a combined forward and reverse rotation tool is used for disassembly and installation of a piston body 1 and a crosshead, which includes a torque transmission rod 100, a force applying member 200, a screw assembly 300, a first L-shaped screw 400 and a second L-shaped screw 500. The torque transmission rod 100 is provided with a first end 110 and a second end 120 that are far away from each other; the force applying member 200 is detachably connected to the first end 110; the screw assembly 300 includes a fixing block 310 fixed to the second end 120, and fixing blocks 310 and 310 respectively fixed to the fixing blocks 310 and 310. 10. The first screw 311 and the second screw 312 on both sides of the piston body 10; the first L-shaped screw 400 is detachably fixed in a lifting ring spiral hole 11 of the piston body 1; the second L-shaped screw 500 is detachably fixed in another lifting ring spiral hole 12 of the piston body 1; when the screw assembly 300 is placed between the first L-shaped screw 400 and the second L-shaped screw 500, and the screw assembly 300 is rotated, the first L-shaped screw 400 abuts against the first screw 311, and the second L-shaped screw 500 abuts against the second screw 312 to transmit torque. When the screw assembly 300 is placed between the first L-shaped screw 400 and the second L-shaped screw 500, and moves in the axial direction away from the piston body 1, the first L-shaped screw 400 is connected to the first screw 311, and the second L-shaped screw 500 is connected to the second screw 312 to transmit torque. Figure 1 The middle piston body 1 is provided with two lifting ring spiral holes 11, 12, which are used to connect with the first L-shaped screw nail 400 and the second L-shaped screw nail 500 respectively.

[0034] Method of using the above combined forward and reverse rotation tool:

[0035] Step S100, dismantle the compressor crosshead window and loosen the locking nut connecting the piston rod and the crosshead, and at the same time dismantle the compressor cylinder head gland to expose the piston body 1.

[0036] Step S200 , screwing two L-shaped screw pins corresponding to the eye holes of the piston body 1 , namely, a first L-shaped screw pin 400 and a second L-shaped screw pin 500 , into the piston body 1 .

[0037] Step S300: hang the T-frame on two screws.

[0038] Step S400: insert the force applying member 200 into the circular ring of the torque transmission rod 100, and rotate it counterclockwise 360 ​​degrees continuously to separate the piston rod from the crosshead.

[0039] Step S500: Use a T-bar to hang the L-shaped screw to pull out the piston component.

[0040] Step S600: disassembly is completed.

[0041] Step S700: After replacing the compressor components, the piston body 1 can be screwed back in the reverse direction to connect.

[0042] The combined forward and reverse rotation tool is specially used for the disassembly and installation of the piston body 1 and the crosshead. It is light, easy to carry, and easy to assemble. It can rotate 360° in the forward and reverse directions continuously. It can operate on pistons of different diameters of compressor cylinders. Practice has proved that it can be used for the disassembly and installation of parts corresponding to the cylinder inner diameter of 100mm-500mm. It has a wide range of applications, saves time and effort, is easy to carry, and can be quickly disassembled and reassembled, greatly improving work efficiency. The combined forward and reverse rotation tool does not require the wrench to directly contact the piston rod, avoiding collisions with the piston rod caused by repeated use of the wrench, and can protect the piston rod to a certain extent.

[0043] It should be noted that, in the specific setting, the force-applying member 200 adopts a detachable rotating force rod with a radius of 25mm and a length of 600mm. When fixed, a circular ring with a diameter of 26mm-28mm is welded at the first end 110 of the torque transfer rod 100, and the rotating force rod is inserted into the circular ring and fixed.

[0044] In one embodiment, the fixing block 310 is welded to the second end 120 of the torque transmission rod 100 to form a T-shaped structure. When specifically set, the fixing block 310 can be selected from a 95mm×26mm×26mm rectangular block, and in coordination with it, a long hole is drilled and tapped along the length of the rectangular block, i.e., 95mm, to form a matching combination with an M16 screw. It should be noted that the diameter of the tapping corresponds to the specifications of the first screw 311 and the second screw 312. In addition, as an example, the torque transmission rod 100 uses two steel pipes with an outer diameter of 25mm and a length of 600mm, one end of which is welded to the rectangular block to form a T-shaped frame, and the other end is welded with a circular ring with an inner diameter of 26mm-28mm for fixing the force-applying member 200, and the other steel pipe is inserted into the circular ring as the force-applying member 200. When setting, other forms of force-applying members 200 can also be selected as needed, such as a rotating handwheel, etc., as long as it is convenient for the operator to apply force.

[0045] In one embodiment, internal threaded holes are respectively formed on two opposite end surfaces of the fixing block 310 , the first L-shaped screw 400 is connected to the internal threaded hole on one side, and the second L-shaped screw 500 is connected to the internal threaded hole on the other side.

[0046] In one embodiment, the first screw nail 311 has a first annular recess 3111 for matching with the outer diameter of the first L-shaped screw nail 400 , and the second screw nail 312 has a second annular recess 3121 for matching with the outer diameter of the second L-shaped screw nail 500 .

[0047] In one embodiment, the bent end of the first L-shaped screw 400 points to the first direction, and the bent end of the second L-shaped screw 500 points to the second direction, and the first direction and the second direction are 180 degrees. In this way, when the torque transmission rod 100 is pulled, the first L-shaped screw 400 is hooked with the first screw 311, and the second L-shaped screw 500 is hooked with the second screw 312, so that the hooking is more reliable and the force is more uniform, thereby improving the stability of the operation.

[0048] In one embodiment, the first screw 311 and the second screw 312 each include at least one size specification.

[0049] In one embodiment, the length of the first screw 311 and the second screw 312 ranges from 50 mm to 250 mm, and can be symmetrically screwed into the spiral hole of the fixing block 310, and the length of the size can be adjusted by rotation according to the size of the inner diameter of the compressor cylinder.

[0050] In one embodiment, the first L-shaped screw nail 400 and the second L-shaped screw nail 500 include three sizes respectively.

[0051] In one embodiment, the three sizes include diameters of 8mm, 10mm and 12mm. In specific settings, three groups of L-shaped screws can be prepared, two in each group, and six in total with diameters of 8mm, 10mm and 12mm can be selected respectively. The combination can be selected according to the diameter of the two lifting ring spiral holes on the end face of the compressor piston body 1, and screwed into the piston body 1. The function is to connect the compressor piston body 1 to the T-frame through the L-shaped screw, and disassemble and pull out the piston by rotating.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. A combined forward and reverse rotation tool for disassembly and installation of a piston rod and a crosshead, characterized in that: include A torque transfer rod having a first end and a second end that are spaced apart from each other; a force applying member, detachably connected to the first end; A screw nail assembly, comprising a fixing block fixed to the second end, and a first screw nail and a second screw nail respectively fixed to two sides of the fixing block; A first L-shaped screw is detachably fixed in a screw hole of a lifting ring of the piston body; and A second L-shaped screw is detachably fixed in another lifting ring screw hole of the piston body; When the screw nail assembly is placed between the first L-shaped screw nail and the second L-shaped screw nail, and the screw nail assembly is rotated, the first L-shaped screw nail abuts against the first screw nail, and the second L-shaped screw nail abuts against the second screw nail, so as to transmit torque; When the screw nail assembly is placed between the first L-shaped screw nail and the second L-shaped screw nail and moves axially away from the piston body, the first L-shaped screw nail is hooked with the first screw nail, and the second L-shaped screw nail is hooked with the second screw nail to transmit torque.

2. A combined forward and reverse rotating tool according to claim 1, characterized in that: The fixing block is welded to the second end of the torque transfer rod to form a T-shaped structure.

3. A combined forward and reverse rotating tool according to claim 1, characterized in that: Internal threaded holes are respectively formed on two opposite end surfaces of the fixing block, the first L-shaped screw is connected to the internal threaded hole on one side, and the second L-shaped screw is connected to the internal threaded hole on the other side.

4. A combined forward and reverse rotating tool according to claim 1, characterized in that: The first screw nail has a first annular recess, which is used to match the outer diameter of the first L-shaped screw nail. The second screw nail has a second annular recess, which is used to match the outer diameter of the second L-shaped screw nail.

5. A combined forward and reverse rotating tool according to claim 1, characterized in that: The bent end of the first L-shaped screw nail points to a first direction, and the bent end of the second L-shaped screw nail points to a second direction, and the first direction is 180 degrees to the second direction.

6. A combined forward and reverse rotating tool according to any one of claims 1 to 5, characterized in that: The first screw nail and the second screw nail respectively include at least one size specification.

7. A combined forward and reverse rotating tool according to claim 6, characterized in that: The lengths of the first screw and the second screw are in the range of 50 mm to 250 mm.

8. A combined forward and reverse rotating tool according to any one of claims 1 to 5, characterized in that: The first L-shaped screw nail and the second L-shaped screw nail include three sizes respectively.

9. A combined forward and reverse rotating tool according to claim 8, characterized in that: The three sizes include diameters of 8 mm, 10 mm and 12 mm.

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