A tool for hoisting and turning over the piston rod of a low-speed diesel engine and a method of using the tool

Abstract

The present invention discloses a tool for hoisting and turning over the piston rod of a low-speed diesel engine and a method for using the tool, which comprises a mounting frame, two alignment frames plugged into the mounting frame and used for plugging and fixing piston rods of different sizes, two connecting rods connected to the middle of the mounting frame through a rotating shaft, a sleeve movably sleeved with the connecting rod, and a supporting steel frame fixedly installed on the side of the sleeve away from the connecting rod. The tool for hoisting and turning over the piston rod of a low-speed diesel engine and a method for using the tool described in the present invention, through the installation of the alignment frame, the rotating shaft, the connecting rod, the sleeve and the supporting steel frame, enables the piston rod to use the supporting steel frame in contact with the ground as a fulcrum during the lifting process, avoiding the alignment frame connected to the piston rod through hole from being used as a fulcrum during the lifting process, protecting the nozzle at one end of the piston rod while avoiding the through hole of the piston rod from being damaged by force; by plugging a No. 1 plug rod into alignment holes at different positions, the assembly operation of piston rods of different sizes can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tooling for lifting a piston rod of a diesel engine, and in particular to a tooling for lifting and turning a piston rod of a low-speed diesel engine and a use method thereof. Background Art

[0002] The piston assembly on the low-speed diesel engine includes the piston rod, piston head, piston skirt, cooling plate, inner cooling tube and other parts. The installation process is as follows: first install the nozzle on the cooling plate, then install the inner cooling tube in the piston rod, then connect the cooling plate and inner cooling tube with the nozzle to the piston rod with studs, then install the piston skirt on the piston head with bolts, and finally assemble the piston rod and the piston head together. After that, the piston rod needs to be turned over. Due to the different output power of the diesel engine, the cylinder diameter of the diesel engine is also different, and the weight of the piston rod ranges from 1 ton to 3.5 tons, so the turning over of the piston rod requires hoisting. When the existing piston rod is turning over, in order to reduce the occupancy of the lifting equipment, a tooling piece is often installed on the side of the piston rod where the nozzle is installed, and then the tooling piece is used as a fulcrum to protect the nozzle on one side of the piston rod during the lifting process. However, the connection between the tooling piece and the piston rod is often subjected to greater pressure during the lifting process, which can easily cause damage to the through hole on the piston rod that is connected to the piston head, thereby affecting the subsequent assembly operation of the piston rod and the piston head. In addition, this type of tooling piece can often only adapt to the assembly operation of a piston rod of a certain size, resulting in a narrow scope of application of the existing tooling piece for the piston rod, which is not conducive to large-scale promotion and use. Summary of the invention

[0003] The main purpose of the present invention is to provide a tool for hoisting and turning over the piston rod of a low-speed diesel engine and a use method thereof, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A tool for lifting and turning over a piston rod of a low-speed diesel engine, comprising a mounting frame, two alignment frames plugged into the mounting frame and used for plugging and fixing piston rods of different sizes, two connecting rods connected to the middle of the mounting frame through a rotating shaft, a sleeve movably sleeved with the connecting rod, and a supporting steel frame fixedly mounted on a side of the sleeve away from the connecting rod;

[0006] Among them, the alignment frame includes an adapter plate located on the side of the mounting frame close to the nozzle on the piston rod, a number of No. 1 plug rods fixedly installed on one side of the adapter plate and movably plugged with the mounting frame, and a No. 1 locking nut threadedly sleeved on the No. 1 plug rod, a connecting rod fixedly installed on the other side of the adapter plate, and an assembly part fixedly connected to the connecting rod and used to be plugged and fixed with the through hole on the piston rod.

[0007] As a further optimization solution of the present invention, the mounting frame is provided with a plurality of alignment holes matching the No. 1 insertion rod.

[0008] As a further optimization solution of the present invention, the outer surface of the connecting rod is respectively fixedly sleeved with a controller and a collar, the lower end of the collar is fixedly embedded with a contact sensor, and the controller is provided with an alarm;

[0009] Wherein, the controller is electrically connected to the alarm and the contact sensor respectively.

[0010] As a further optimization scheme of the present invention, the assembly includes a No. 2 plug rod fixedly connected to the connecting rod and having a threaded section, a No. 2 locking nut threadedly sleeved on the threaded section of the No. 2 plug rod, and two gaskets sleeved on the No. 2 plug rod and used to tighten the piston rod.

[0011] As a further optimization solution of the present invention, the hardness of the No. 2 plug rod is less than the hardness of the piston rod.

[0012] As a further optimization solution of the present invention, the diameter of the second plug rod is smaller than the diameter of the connecting rod.

[0013] As a further optimization solution of the present invention, the support steel frame is an I-shaped structure, and the support steel frame is made of # steel.

[0014] A method for using a tool for hoisting and turning over a piston rod of a low-speed diesel engine comprises the following steps:

[0015] (1) According to the size of the piston rod, insert the No. 1 plug rod on the connecting rod into the corresponding alignment hole on the mounting frame, and flexibly sleeve the No. 1 locking nut on the No. 1 plug rod to achieve the fixation between the alignment frame and the mounting frame, insert the No. 2 plug rod into the through hole on the piston rod, insert the gasket, and thread the No. 2 locking nut on the threaded section of the No. 2 plug rod, and install the tooling and the piston rod;

[0016] (2) The crane hoists the end of the piston rod away from the tooling, and the supporting steel frame serves as a fulcrum and contacts the ground during the hoisting process of the crane;

[0017] (3) The hoisting machine continues to lift the piston rod until the supporting steel frame is detached from the ground. When the alarm sounds, the hoisting personnel adjust the lifting height, the piston rod turning operation is completed, and the next piston rod is moved.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by installing the alignment frame, rotating shaft, connecting rod, sleeve and supporting steel frame, the piston rod uses the supporting steel frame in contact with the ground as a fulcrum during the lifting process, avoiding the alignment frame connected to the through hole of the piston rod from being used as a fulcrum during the lifting process, protecting the nozzle at one end of the piston rod while avoiding the through hole of the piston rod from being damaged by force, thereby ensuring the subsequent assembly operation of the piston rod and the piston head.

[0020] 2. In the present invention, by plugging a No. 1 plug rod into the alignment holes at different positions and fixing it with a No. 1 locking nut, the assembly operation of piston rods of different sizes is achieved, making the tooling for lifting and turning operations more applicable.

[0021] 3. In the present invention, by sleeve-fitting the gasket on the No. 2 plug rod, the gasket is pressed against the mounting surface of the piston rod through hole under the action of the No. 2 locking nut, thereby realizing the protection operation of the mounting surface of the piston rod through hole.

[0022] 4. In the present invention, the tooling uses the supporting steel frame as a fulcrum. Compared with the traditional method in which the alignment frame is directly used as a fulcrum, it can protect the nozzle on one side of the piston rod while reducing the number of assembly parts in the piston rod through hole, thereby speeding up the assembly speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall structural diagram of a tooling for hoisting and turning over a piston rod of a low-speed diesel engine according to the present invention;

[0024] Figure 2 It is a schematic diagram of the connection between the mounting frame and the alignment frame of a tooling for hoisting and turning over the piston rod of a low-speed diesel engine according to the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of a mounting frame of a tooling for hoisting and turning over a piston rod of a low-speed diesel engine according to the present invention;

[0026] Figure 4 It is a structural schematic diagram of a tooling for hoisting and turning over a piston rod of a low-speed diesel engine of the present invention when in use;

[0027] Figure 5 The present invention is a schematic structural diagram of an assembly part of a tooling for hoisting and turning over a piston rod of a low-speed diesel engine.

[0028] In the figure: 1. mounting frame; 2. rotating shaft; 3. connecting rod; 4. sleeve; 5. supporting steel frame; 6. alignment frame; 11. alignment hole; 31. collar; 32. contact sensor; 33. controller; 34. alarm; 61. No. 1 locking nut; 62. No. 1 plug rod; 63. connecting rod; 64. assembly part; 65. adapter plate; 641. No. 2 plug rod; 642. No. 2 locking nut; 643. gasket. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, a tool for hoisting and turning over the piston rod of a low-speed diesel engine comprises a mounting frame 1, two alignment frames 6 plugged into the mounting frame 1 and used for plugging and fixing piston rods of different sizes, two connecting rods 3 connected to the middle of the mounting frame 1 through a rotating shaft 2, a sleeve 4 movably sleeved with the connecting rod 3, and a supporting steel frame 5 fixedly mounted on the sleeve 4 away from the connecting rod 3.

[0032] Among them, the alignment frame 6 includes an adapter plate 65 located on the side of the mounting frame 1 close to the nozzle on the piston rod, a number of No. 1 plug rods 62 fixedly installed on one side of the adapter plate 65 and movably plugged with the mounting frame 1, and a No. 1 locking nut 61 threadedly sleeved on the No. 1 plug rod 62, a connecting rod 63 fixedly installed on the other side of the adapter plate 65, and an assembly part 64 fixedly connected to the connecting rod 63 and used to be plugged and fixed with the through hole on the piston rod.

[0033] like Figure 1 , Figure 3 and Figure 4 As shown, the mounting frame 1 is provided with a plurality of alignment holes 11 matching with the No. 1 plug rod 62; the outer surface of the connecting rod 3 is respectively fixedly sleeved with a controller 33 and a collar 31, the lower end of the collar 31 is fixedly embedded with a contact sensor 32, and the controller 33 is provided with an alarm 34; wherein, the controller 33 is electrically connected with the alarm 34 and the contact sensor 32 respectively; the supporting steel frame 5 is in an I-shaped structure, and the supporting steel frame 5 is made of 45# steel, the controller 33 is provided with a single-chip microcomputer of model PIC16C72, and the contact sensor 32 model is RV-163-1C2, when the sleeve 4 contacts with the contact sensor 32 on the connecting rod 3, the contact sensor 32 transmits the contact signal to the controller 33, and the controller 33 controls the alarm 34 to sound an alarm, thereby reminding the hoisting personnel to adjust the hoisting height, so as to facilitate the smooth progress of the hoisting and turning operation.

[0034] like Figure 5As shown, the assembly part 64 includes a No. 2 plug rod 641 fixedly connected to the connecting rod 63 and having a threaded section, a No. 2 locking nut 642 threadedly sleeved on the threaded section of the No. 2 plug rod 641, and two gaskets 643 sleeved on the No. 2 plug rod 641 and used to press the piston rod; the hardness of the No. 2 plug rod 641 is less than the hardness of the piston rod; the diameter of the No. 2 plug rod 641 is smaller than the diameter of the connecting rod 63, and a nozzle is provided on the side of the piston rod close to the through hole for installing the piston head. During the installation process, by plugging the No. 1 plug rod 62 into the alignment holes 11 at different positions, the assembly operation of piston rods of different sizes can be realized, so that the tooling for lifting and turning operations has a wider range of applications.

[0035] A method for using a tool for hoisting and turning over a piston rod of a low-speed diesel engine comprises the following steps:

[0036] (1) According to the size of the piston rod, insert the No. 1 plug rod 62 on the connecting rod 63 into the corresponding alignment hole 11 on the mounting frame 1, and flexibly sleeve the No. 1 locking nut 61 on the No. 1 plug rod 62 to achieve the fixation between the alignment frame 6 and the mounting frame 1, insert the No. 2 plug rod 641 into the through hole on the piston rod, insert the gasket 643, and thread the No. 2 locking nut 642 on the threaded section of the No. 2 plug rod 641, and install the tooling and the piston rod;

[0037] (2) The lifting machine lifts the piston rod away from the end of the tooling, and the support steel frame 5 serves as a fulcrum and contacts the ground during the lifting process of the lifting machine;

[0038] (3) The hoisting machine continues to lift the piston rod until the supporting steel frame 5 is separated from the ground. When the alarm 34 sounds, the hoisting personnel adjust the lifting height, the piston rod turning operation is completed, and the next piston rod is continued.

[0039] It should be noted that the present invention is a tool for hoisting and turning over the piston rod of a low-speed diesel engine. When the piston rod of a low-speed diesel engine needs to be hoisted and turned over, first, according to the corresponding size of the piston rod, the No. 1 plug rod 62 on the connecting rod 63 is inserted into the corresponding alignment hole 11 on the mounting frame 1, and then the No. 1 locking nut 61 is movably sleeved on the No. 1 plug rod 62 to achieve the fixing operation of the alignment frame 6 and the mounting frame 1, and the mounting frame 1 is provided with a plurality of alignment holes 11 corresponding to the No. 1 plug rod 62. During the installation process, The No. 1 plug rod 62 is plugged into the alignment holes 11 at different positions to realize the assembly of piston rods of different sizes, making the tooling for lifting and turning operations more widely applicable. After the alignment frame 6 and the mounting frame 1 are installed, the No. 2 plug rod 641 with the gasket 643 can be inserted into the through hole on the piston rod, and then another gasket 643 can be inserted, and the No. 2 locking nut 642 can be threadedly sleeved on the threaded section of the No. 2 plug rod 641, so that the gasket 643 is pressed against the piston rod through hole under the action of the No. 2 locking nut 642. The mounting surface of the hole is provided with a lifting machine to lift one end of the piston rod during the lifting process. At this time, the supporting steel frame 5 is used as a fulcrum to contact the ground during the lifting process of the lifting machine, and the connecting rod 3 on the sleeve 4 is rotatably connected to the mounting frame 1 through the rotating shaft 2, thereby preventing the alignment frame 6 on the mounting frame 1 from contacting the ground during the lifting process and using the alignment frame 6 as a fulcrum to protect the alignment frame 6, thereby preventing the alignment frame 6 from damaging the through hole on the mounting frame 1, and facilitating the smooth installation of the subsequent piston rod and the piston head. The nozzle located on one side of the through hole on the piston rod can be protected to prevent the nozzle on the piston rod from contacting the ground. When the piston rod is lifted, when the tooling on the piston rod contacts the ground, the sleeve 4 on the supporting steel frame 5 rises in the connecting rod 3. When the sleeve 4 contacts the contact sensor 32 on the connecting rod 3, the contact sensor 32 transmits the contact signal to the controller 33. The controller 33 controls the alarm 34 to sound an alarm, thereby reminding the lifting personnel to adjust the lifting height, thereby facilitating the smooth progress of the lifting and turning operation.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tool for hoisting and turning over the piston rod of a low-speed diesel engine, characterized in that: It comprises a mounting frame (1), two alignment frames (6) plugged into the mounting frame (1) and used for plugging and fixing piston rods of different sizes, two connecting rods (3) connected to the middle of the mounting frame (1) via a rotating shaft (2), a sleeve (4) movably sleeved with the connecting rods (3), and a supporting steel frame (5) fixedly mounted on a side of the sleeve (4) away from the connecting rods (3); The alignment frame (6) comprises an adapter plate (65) located on the side of the mounting frame (1) close to the nozzle on the piston rod, a plurality of No. 1 plug rods (62) fixedly mounted on one side of the adapter plate (65) and movably plugged with the mounting frame (1), and a No. 1 locking nut (61) threadedly sleeved on the No. 1 plug rod (62), a connecting rod (63) fixedly mounted on the other side of the adapter plate (65), and an assembly part (64) fixedly connected to the connecting rod (63) and used to be plugged and fixed with the through hole on the piston rod; The mounting frame (1) is provided with a plurality of alignment holes (11) that match the No. 1 insertion rod (62); The outer surface of the connecting rod (3) is respectively fixedly sleeved with a controller (33) and a collar (31); a contact sensor (32) is fixedly embedded at the lower end of the collar (31); and an alarm (34) is provided on the controller (33); Wherein, the controller (33) is electrically connected to the alarm (34) and the contact sensor (32) respectively; The assembly part (64) comprises a No. 2 plug rod (641) fixedly connected to the connecting rod (63) and having a threaded section, a No. 2 locking nut (642) threadedly sleeved on the threaded section of the No. 2 plug rod (641), and two washers (643) sleeved on the No. 2 plug rod (641) and used to press the piston rod.

2. The tooling for hoisting and turning over the piston rod of a low-speed diesel engine according to claim 1 is characterized by: The hardness of the second plug rod (641) is less than the hardness of the piston rod.

3. The tooling for hoisting and turning over the piston rod of a low-speed diesel engine according to claim 2 is characterized by: The diameter of the second insertion rod (641) is smaller than the diameter of the connecting rod (63).

4. The tooling for hoisting and turning over the piston rod of a low-speed diesel engine according to claim 1 is characterized by: The supporting steel frame (5) is in an I-shaped structure, and the supporting steel frame (5) is made of 45# steel.

5. A method for using the tooling for hoisting and turning over the piston rod of a low-speed diesel engine as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: (1) According to the size of the piston rod, the No. 1 plug rod (62) on the connecting rod (63) is inserted into the corresponding alignment hole (11) on the mounting frame (1), and the No. 1 locking nut (61) is movably sleeved on the No. 1 plug rod (62) to achieve the fixation between the alignment frame (6) and the mounting frame (1), and the No. 2 plug rod (641) is inserted into the through hole on the piston rod, the gasket (643) is inserted, and the No. 2 locking nut (642) is threadedly sleeved on the threaded section of the No. 2 plug rod (641), and the tooling and the piston rod are installed; (2) The crane hoists the end of the piston rod away from the tooling, and the supporting steel frame (5) serves as a fulcrum and is in contact with the ground during the hoisting process of the crane; (3) The hoisting machine continues to lift the piston rod until the supporting steel frame (5) is detached from the ground. When the alarm (34) sounds, the hoisting personnel adjust the lifting height, the piston rod turning operation is completed, and the next piston rod is moved.

Images