Ultra-large oil cylinder piston rod assembling tool and using method

Abstract

The invention discloses a super-large oil cylinder piston rod assembling tool and a using method. The super-large oil cylinder piston rod assembling tool comprises a piston rod supporting assembly, a rod head position adjusting tool and a distance measuring sensor. The piston rod supporting assembly is used for supporting a piston rod and driving the piston rod to rotate. The rod head position adjusting tool is used for supporting the rod head and driving the rod head to be adjusted in the up-down direction, the left-right direction and the front-back direction. A distance measuring sensor is installed on the rod head position adjusting tool and used for measuring the distance between the rod head and the piston rod. Automatic centering and positioning and automatic thread assembly of the piston rod and the rod head of the oversized oil cylinder are achieved, the thread assembly problem of large-size components is solved, the assembly quality and efficiency of the oversized oil cylinder are remarkably improved, and the assembly safety of the oil cylinder is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil cylinders, and more specifically, to an assembly tool for an oversized oil cylinder piston rod and a method for using the same. Background Art

[0002] As marine engineering construction continues to extend to deep offshore areas, major engineering projects such as cross-sea channels and deep-sea wind power construction are increasing, and there is a growing reliance on large-scale piling vessels, and their specifications are also getting larger and larger. The main oil cylinder of the pile frame of the piling vessel is the core component of the large-scale piling vessel. It is mainly used for the pitching action of the pile frame. The diameter of the cylinder exceeds 1.6m and the stroke exceeds 21m.

[0003] For super large oil cylinders such as the main oil cylinder of the pile frame of the pile driving ship, in order to ensure uniform force, the piston rod and the rod head are generally connected by thread. Since the rod head is a special-shaped structure, when the piston rod and the rod head are threaded, they are generally installed by hoisting and positioning the rod head and rotating the piston rod at a constant speed and feeding the thrust. With the continuous increase in the specifications of the oil cylinder, the piston rod and the rod head are getting heavier. Taking the 1600 / 1120-2100 oil cylinder as an example, the piston rod is 24.6 meters long and weighs 110 tons, and the rod head weighs 26 tons. If the traditional solution is adopted, it is difficult to accurately align the piston rod and the rod head during the threaded assembly due to the large size of the piston rod and the heavy rod head. At the same time, the tightening parameters such as the screw-in thrust, screw-in speed and tightening torque cannot be adjusted in real time, resulting in low thread assembly efficiency and easy to bite. Once the teeth are damaged, it is difficult to repair quickly, and even the thread cannot be repaired, requiring large-scale rework. In addition, for such large-sized piston rods and rod heads, the use of a hoisting solution to adjust the rod head poses a major safety hazard. Summary of the invention

[0004] The purpose of the present invention is to provide an assembly tool for an oversized oil cylinder piston rod and a method for use, so as to realize automatic centering and positioning and automatic threaded assembly of the oversized oil cylinder piston rod and the rod head, solve the problem of threaded assembly of large-size components, significantly improve the assembly quality and efficiency of oversized oil cylinders, and improve the safety of oil cylinder assembly.

[0005] The technical solution adopted by the present invention to solve this technical problem is: an oversized oil cylinder piston rod assembly tool, used for assembling the piston rod and the rod head, comprising: a piston rod support assembly, a rod head positioning tool and a distance measuring sensor; The piston rod support assembly is used to support the piston rod and drive the piston rod to rotate; The rod head positioning tool is used to support the rod head and drive the rod head to adjust in three directions: up and down, left and right, and front and back; a distance measuring sensor is installed on the rod head positioning tool for measuring the distance between the rod head and the piston rod.

[0006] As a further solution of the present invention, it also includes: an industrial computer, a display screen and an audible and visual alarm; the industrial computer is connected to the display screen, the audible and visual alarm, the distance measuring sensor, the electrical components of the piston rod support assembly, and the electrical components of the rod head adjustment tooling.

[0007] As a further solution of the present invention, the piston rod support assembly comprises: a support slide, a support slide seat, a lifting cylinder, a support roller and a rotating motor; The support slide is slidably connected to the support slide groove via a lifting cylinder, and a support roller is rotatably connected to the support slide, and the support roller is driven to rotate by a rotating motor.

[0008] As a further solution of the present invention, an even number of piston rod support assemblies are provided, two piston rod support assemblies form a group and are symmetrically arranged relative to the axis of the piston rod, and at least two groups of piston rod support assemblies are axially spaced apart from each other.

[0009] As a further solution of the present invention, there are three distance measuring sensors, two of which are symmetrically arranged to measure the distance between the left and right sides of the piston rod end, and the remaining central distance measuring sensor is used to measure the distance to the bottom of the piston rod end.

[0010] As a further solution of the present invention, the rod head positioning tool is a three-way positioning mechanism, and the regulating cylinders used in the three-way positioning mechanism are all provided with displacement sensors.

[0011] The present invention also provides a method for using an oversized oil cylinder piston rod assembly tool, comprising the following steps: S1. Put the piston rod in place and place it on the piston rod support assembly. Adjust the lifting cylinder of the piston rod support assembly to ensure that the piston rod is in a horizontal state. S2, put the rod head in place, measure the vertical height of the rod head and enter it into the industrial computer H0; S3. Align the piston rod and the rod head, and adjust the lateral adjustment cylinder and the vertical adjustment cylinder of the rod head to keep the lateral deviation and the vertical deviation within the deviation range; S4, parameter setting: according to the size of piston rod and rod head, set the rated tightening torque, rated screw-in speed and rated screw-in thrust; S5. Start the piston rod support assembly rotation motor to drive the piston rod to rotate, control the rod head adjustment tooling to extend the front and rear adjustment cylinder, and during the process of screwing the piston rod and the rod head, automatically and synchronously adjust the rod head posture according to the lateral deviation and vertical deviation values, monitor various displacement parameters through the display screen, and sound and light alarm when the deviation exceeds a certain value to guide on-site assembly; according to the tightening algorithm preset by the industrial computer, automatically adjust and match the tightening torque, screw-in speed and screw-in thrust, and sound and light reminder when the tightening torque, screw-in speed and screw-in thrust exceed the rated value; when the relevant parameters exceed the maximum value, the equipment is automatically controlled to stop, and sound and light alarm is issued to remind human intervention.

[0012] As a further solution of the present invention, the posture adjustment of the rod head and the piston rod specifically includes: Left and right side posture adjustment: The left distance X1 of the piston rod is measured by the left distance sensor, and the right distance X2 of the piston rod is measured by the right distance sensor, and the lateral deviation X is calculated. c , when X c Less than the control value X d When the rod head is adjusted, the rod head is adjusted by the left and right adjustment cylinders of the rod head adjustment tooling until Xc meets the requirements. At this time, the rod head and the piston rod are centered in the left and right directions; Up and down posture adjustment: measure the distance X between the bottom of the piston rod and the center distance sensor through the center distance sensor m , get the piston rod center height H h ; When the displacement of the vertical adjustment cylinder of the rod head adjustment tooling is 0, the center height H0 of the rod head is actually measured on site; when the displacement of the vertical adjustment cylinder of the rod head adjustment tooling is H1, the rod head is at the real-time center height H g = H1+ H0, through H g and H h , calculate the vertical deviation H of the piston rod and rod head c , by adjusting the vertical adjustment cylinder displacement value until the vertical deviation H c Less than the control value H d , at this time the rod head and the piston rod are consistent in the vertical direction.

[0013] As a further solution of the present invention, the threaded screwing of the rod head and the piston rod specifically includes: setting the initial tightening torque M0 of the rotating motor of the piston rod support assembly, the rotating motor screwing-in speed W0, and the front and rear adjusting cylinder screwing-in thrust F0 of the rod head positioning tooling according to the rod head material type and the thread size; during the screwing-in process, the screwing-in speed and the screwing-in thrust are adjusted in real time according to the actually measured tightening torque size.

[0014] The present invention has at least the following beneficial effects: 1. Through the piston rod support assembly and the rod head adjustment tooling, the rod head position adjustment and piston rod rotation can be performed, and the piston rod and rod head thread mechanical assembly can be realized; 2. The distance measuring sensor of the rod head adjustment tooling and the three-way displacement sensor of the adjustment cylinder can be used to monitor the position of the rod head and the piston rod in real time, so as to achieve accurate thread alignment between the piston rod and the rod head; 3. Utilize the speed regulation and torque control functions of the rotary motor, combined with the front and rear adjustment cylinder thrust control function, set initial parameters for threaded connections of different sizes, and automatically adjust the screw-in parameters (tightening torque, screw-in speed, screw-in thrust) in combination with the parameter adjustment algorithm to prevent teeth from being bitten due to excessive screw-in parameters during assembly of the piston rod and rod head threads.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the super-large oil cylinder piston rod assembly tool of the present invention; Figure 2 It is a partial schematic diagram of the club head positioning tooling of the present invention; Figure 3 It is a side view of the super-large oil cylinder piston rod assembly tool of the present invention; Figure 4 It is a top view of the super-large oil cylinder piston rod assembly tool of the present invention; Figure 5 It is a logical schematic diagram of assembly posture adjustment of the present invention; Figure 6 It is a schematic diagram of the composition of the tooling control system used in the present invention.

[0017] Among them, 1-piston rod support assembly, 101-rotating motor, 102-support roller, 103-lifting cylinder, 2-piston rod, 201-external thread, 3-distance sensor, 4-rod head, 401-internal thread, 5-rod head adjustment tooling, 501-vertical adjustment cylinder, 502-left and right adjustment cylinder, 503-front and rear adjustment cylinder. DETAILED DESCRIPTION

[0018] The present invention is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly pointed out that the technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other without conflict.

[0019] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and implementations, and its specific implementation process is as follows: like Figures 1 to 4 As shown, the present invention provides an oversized oil cylinder piston rod assembly tool, which is used for assembling a piston rod 2 and a rod head 4, wherein the rod end of the piston rod 2 has an external thread 201, and the rod head 4 has an internal thread 401, and the rod end of the piston rod 2 is connected to the rod head 4 through a thread, comprising: a piston rod support assembly 1, a rod head positioning tool 5, and a distance sensor 3; The piston rod support assembly 1 is used to support the piston rod 2 and drive the piston rod 2 to rotate; The rod head positioning tool 5 is used to support the rod head 4 and drive the rod head 4 to adjust in three directions: up and down, left and right, and front and back; a distance sensor 3 is installed on the rod head positioning tool 5 for the distance between the rod head 4 and the piston rod 2. Through the three-way adjustment function of the rod head positioning tool 5, the rod head 4 can be accurately adjusted in three directions.

[0021] The distance sensor 3 is installed on the rod head positioning tool 5. The distance sensor 3 and the rod head positioning tool 5 can be used to control and adjust the position of the piston rod 2 and the rod head 4 in real time to ensure that the piston rod 2 and the rod head 4 do not bite when they are screwed in for installation.

[0022] This technical solution may also include the following technical details to better achieve the technical effect: it also includes: an industrial computer, a display screen and an audible and visual alarm; the industrial computer is connected with the display screen, the audible and visual alarm, the distance sensor 3, the electrical components of the piston rod support assembly 1, and the electrical components of the rod head adjustment tool 5. In this embodiment, the electrical components of the piston rod support assembly 1 are the lifting cylinder 103 and the rotating motor 101, and the electrical components of the rod head adjustment tool 5 are the adjusting cylinder and displacement sensor of the three-way adjustment mechanism.

[0023] This technical solution may also include the following technical details to better achieve the technical effect: the piston rod support assembly 1 includes: a support slide, a support slide, a jacking cylinder 103, a support roller 102 and a rotating motor 101; The support slide is slidably connected to the support slide groove through a lifting cylinder 103, and a support roller 102 is rotatably connected to the support slide. The support roller 102 is driven to rotate by a rotating motor 101. In this embodiment, the rotating motor 101 is a model with speed regulation function and torque control function.

[0024] The present technical solution may also include the following technical details to better achieve the technical effect: the number of piston rod support assemblies 1 is even, two piston rod support assemblies 1 form a group and are symmetrically arranged relative to the axis of the piston rod 2, and at least two groups of piston rod support assemblies 1 are arranged axially at intervals with respect to the piston rod 2.

[0025] The present technical solution may also include the following technical details to better achieve the technical effect: the number of the distance measuring sensors 3 is three, two of which are symmetrically arranged to measure the distance between the left and right sides of the rod end of the piston rod 2, and the remaining central distance measuring sensor 3 is used to measure the distance to the bottom of the rod end of the piston rod 2.

[0026] This technical solution may also include the following technical details to better achieve the technical effect: the rod head adjustment tool 5 is a three-way adjustment mechanism, and the adjustment cylinders used in the three-way adjustment mechanism are all provided with displacement sensors. The adjustment cylinders include a vertical adjustment cylinder 501, a left and right adjustment cylinder 502, and a front and rear adjustment cylinder 503. The rod head adjustment tool 5 is equipped with a hydraulic control valve group, which can infinitely set the propulsion force of the front and rear adjustment cylinders 503 as needed.

[0027] In another embodiment, Figures 5 and 6 As shown, a method for using an oversized oil cylinder piston rod assembly tool comprises the following steps: S1, the piston rod 2 is in place, the piston rod 2 is placed on the piston rod support assembly 1, and the piston rod support assembly 1 is adjusted to lift the oil cylinder 103 to ensure that the piston rod 2 is in a horizontal state; S2, the rod head 4 is in place, the vertical height of the rod head 4 is measured and entered into the industrial computer H0 (when the displacement of the vertical adjustment cylinder 501 of the rod head adjustment tool 5 is 0); S3, align the piston rod 2 and the rod head 4, and adjust the lateral adjustment cylinder and the vertical adjustment cylinder 501 of the rod head 4 to maintain the lateral deviation and the vertical deviation within the deviation range; S4, parameter setting: according to the size of the piston rod 2 and the rod head 4, set the rated tightening torque, rated screw-in speed, and rated screw-in thrust; S5. Start the rotating motor 101 of the piston rod support assembly 1 to drive the piston rod 2 to rotate, control the rod head positioning tooling 5 to extend the front and rear adjustment cylinder 503, and during the threaded screwing process of the piston rod 2 and the rod head 4, automatically and synchronously adjust the rod head 4 posture according to the lateral deviation and vertical deviation values. Various displacement parameters can be monitored through the display screen. When the deviation exceeds a certain value, an audible and visual alarm is given to guide on-site assembly; according to the tightening algorithm preset by the industrial computer, the tightening torque, screw-in speed and screw-in thrust are automatically adjusted and matched. When the tightening torque, screw-in speed and screw-in thrust exceed the rated values, an audible and visual reminder is given; when the relevant parameters exceed the maximum value, the equipment is automatically controlled to shut down, and an audible and visual alarm is given to remind human intervention.

[0028] The technical solution may also include the following technical details to better achieve the technical effect: the posture adjustment of the rod head 4 and the piston rod 2 specifically includes: Left and right side posture adjustment: The left distance X1 of the piston rod 2 is measured by the left distance sensor 3, and the right distance X2 of the piston rod 2 is measured by the right distance sensor 3 to calculate the lateral deviation X c , when X c Less than the control value X d When the rod head 4 is adjusted by the left and right adjustment cylinders 502 of the rod head adjustment tooling 5, until Xc meets the requirement, at which time the rod head 4 and the piston rod 2 are centered in the left and right directions; Up and down posture adjustment: The distance X between the bottom of the piston rod 2 and the center distance sensor 3 is measured by the center distance sensor 3 m , get the center height H of piston rod 2 h , piston rod 2 diameter D1, H h= X m +D1 / 2; When the displacement of the vertical adjustment cylinder 501 of the rod head adjustment tool 5 is 0, the center height H0 of the rod head 4 is actually measured on site; when the displacement of the vertical adjustment cylinder 501 of the rod head adjustment tool 5 is H1, the center height H0 of the rod head 4 is measured on site; g = H1+ H0, through H g and H h , calculate the vertical deviation H of the piston rod 2 and the rod head 4 c (Difference between the center of the piston rod 2 and the center of the rod head 4 (Hg-Hh)), by adjusting the displacement value of the vertical adjustment cylinder 501 until the vertical deviation H c Less than the control value H d At this time, the rod head 4 and the piston rod 2 are consistent in the vertical direction.

[0029] This technical solution can also include the following technical details to better achieve the technical effect: The threading of the rod head 4 and the piston rod 2 specifically includes: according to the material type and thread size of the rod head 4, the initial tightening torque M0 of the rotating motor 101 of the piston rod support assembly 1, the screwing speed W0 of the rotating motor 101, and the screwing thrust F0 of the front and rear adjustment cylinder 503 of the rod head adjustment tooling 5 are set. In the screwing process, in order to prevent the motor from overloading and avoid the risk of teeth biting, the screwing speed and screwing thrust are adjusted in real time according to the measured tightening torque size. The relevant methods are shown in Table 1 below: Table 1 project Tightening torque Screw-in speed Screw-in thrust Working condition 1 <![CDATA[≤M0]]> <![CDATA[W0]]> <![CDATA[F0]]> Working condition 2 <![CDATA[M0-n1*M0]]> <![CDATA[a1*W0]]> <![CDATA[m1*F0]]> Working condition three <![CDATA[n1*M0-n2*M0]]> <![CDATA[a2*W0]]> <![CDATA[m2*F0]]> Working condition 4 <![CDATA[n2*M0-n3*M0]]> <![CDATA[a3*W0]]> <![CDATA[m3*F0]]> Working condition five <![CDATA[≥n3M0]]> 0 <![CDATA[m3*F0]]> Note: M0, W0 and F0 represent the rated tightening torque, rated screw-in speed and rated screw-in thrust respectively.

[0030] n1, n2, and n3 represent the tightening torque overload coefficient, with a value range of 100%-200%. The value is determined according to the allowable torque of threads of different sizes. It can also be further subdivided according to control requirements. In theory, a one-to-one constraint can be imposed on the maximum allowable tightening torque range, where 100%<n1<n2<n3<200%.

[0031] a1, a2, and a3 represent screw-in speed reduction coefficients with a value range of 0-100%. They are determined according to the screw-in speeds of threads of different sizes and can be further subdivided according to control requirements. In theory, one-to-one constraints can be imposed within the maximum allowable screw-in speed range, where 0<a3<a2<a1<100%.

[0032] m1, m2, and m3 represent the screw-in thrust overload coefficients, with a value range of 100%-300%. They are determined according to the screw-in thrust limits of threads of different sizes. They can also be further subdivided according to control requirements. In theory, one-to-one constraints can be imposed within the maximum allowable screw-in thrust range, where 100%<m1<m2<m3<300%.

[0033] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. An oversized oil cylinder piston rod assembly tool, used for assembling a piston rod and a rod head, characterized in that: include: Piston rod support assembly, rod head adjustment tooling and distance sensor; The piston rod support assembly is used to support the piston rod and drive the piston rod to rotate; The rod head positioning tool is used to support the rod head and drive the rod head to adjust in three directions: up and down, left and right, and front and back; a distance measuring sensor is installed on the rod head positioning tool for measuring the distance between the rod head and the piston rod.

2. The super-large oil cylinder piston rod assembly tool as claimed in claim 1, characterized in that: Also includes: An industrial computer, a display screen and an audible and visual alarm; the industrial computer is connected to the display screen, the audible and visual alarm, the distance measuring sensor, the electrical components of the piston rod support component, and the electrical components of the rod head adjustment tooling.

3. The super-large oil cylinder piston rod assembly tool as claimed in claim 1 or 2, characterized in that: The piston rod support assembly comprises: a support slide, a support slide seat, a lifting cylinder, a support roller and a rotating motor; The support slide is slidably connected to the support slide groove via a lifting cylinder, and a support roller is rotatably connected to the support slide, and the support roller is driven to rotate by a rotating motor.

4. The super-large oil cylinder piston rod assembly tool as claimed in claim 3, characterized in that: The number of piston rod support assemblies is even, two piston rod support assemblies form a group and are symmetrically arranged relative to the axis of the piston rod, and at least two groups of piston rod support assemblies are arranged axially at intervals on the piston rod.

5. The super-large oil cylinder piston rod assembly tool as claimed in claim 1, characterized in that: The number of the distance measuring sensors is three, two of which are symmetrically arranged to measure the distance between the left and right sides of the piston rod end, and the remaining central distance measuring sensor is used to measure the distance to the bottom of the piston rod end.

6. The super-large oil cylinder piston rod assembly tool as claimed in claim 1, characterized in that: The rod head positioning tool is a three-way positioning mechanism, and the regulating cylinders used in the three-way positioning mechanism are all provided with displacement sensors.

7. A method for using the super-large oil cylinder piston rod assembly tool as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Put the piston rod in place and place it on the piston rod support assembly. Adjust the lifting cylinder of the piston rod support assembly to ensure that the piston rod is in a horizontal state. S2, put the rod head in place, measure the vertical height of the rod head and enter it into the industrial computer H0; S3. Align the piston rod and the rod head, and adjust the lateral adjustment cylinder and the vertical adjustment cylinder of the rod head to keep the lateral deviation and the vertical deviation within the deviation range; S4, parameter setting: according to the size of piston rod and rod head, set the rated tightening torque, rated screw-in speed and rated screw-in thrust; S5. Start the piston rod support assembly rotation motor to drive the piston rod to rotate, control the rod head adjustment tooling to extend the front and rear adjustment cylinder, and during the process of screwing the piston rod and the rod head, automatically and synchronously adjust the rod head posture according to the lateral deviation and vertical deviation values, monitor various displacement parameters through the display screen, and sound and light alarm when the deviation exceeds a certain value to guide on-site assembly; according to the tightening algorithm preset by the industrial computer, automatically adjust and match the tightening torque, screw-in speed and screw-in thrust, and sound and light reminder when the tightening torque, screw-in speed and screw-in thrust exceed the rated value; When the relevant parameters exceed the maximum value, the equipment will be automatically controlled to shut down and sound and light alarms will be given.

8. The method for using the super-large oil cylinder piston rod assembly tool as claimed in claim 7, characterized in that: The adjustment of the rod head and piston rod posture specifically includes: Left and right side posture adjustment: The left distance X1 of the piston rod is measured by the left distance sensor, and the right distance X2 of the piston rod is measured by the right distance sensor, and the lateral deviation X is calculated. c , when X c Less than the control value X d When the rod head is adjusted, the rod head is adjusted by the left and right adjustment cylinders of the rod head adjustment tooling until Xc meets the requirements. At this time, the rod head and the piston rod are centered in the left and right directions; Up and down posture adjustment: measure the distance X between the bottom of the piston rod and the center distance sensor through the center distance sensor m , get the piston rod center height H h ; When the displacement of the vertical adjustment cylinder of the rod head adjustment tooling is 0, the center height H0 of the rod head is actually measured on site; when the displacement of the vertical adjustment cylinder of the rod head adjustment tooling is H1, the rod head is at the real-time center height H g = H1 + H0, through H g and H h , calculate the vertical deviation H of the piston rod and rod head c , by adjusting the vertical adjustment cylinder displacement value until the vertical deviation H c Less than the control value H d , at this time the rod head and the piston rod are consistent in the vertical direction.

9. The method for using the super-large oil cylinder piston rod assembly tool as claimed in claim 7, characterized in that: The threading of the rod head and the piston rod specifically includes: setting the initial tightening torque M0 of the rotating motor of the piston rod support assembly, the rotating motor screwing-in speed W0, and the front and rear adjustment cylinder screwing-in thrust F0 of the rod head adjustment tooling according to the rod head material type and thread size; during the screwing-in process, the screwing-in speed and screwing-in thrust are adjusted in real time according to the measured tightening torque size.

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