CN220781865U - Piston rod straightening device - Google Patents

Abstract

The utility model discloses a piston rod straightening device which comprises a platform base, a straightening module, a deformation measuring module and a calculating module, wherein the straightening module is arranged on the platform base and is used for straightening a piston rod, the deformation measuring module is arranged on the platform base and is used for measuring the deformation of the piston rod, and the calculating module is used for calculating the theoretical bending amount of the piston rod according to the deformation. The piston rod straightening device is reasonable in structure, shortens the straightening time and can effectively improve the straightening precision and the straightening efficiency.

Description

Piston rod straightening device

Technical Field

The utility model relates to the technical field of piston rod straightening, in particular to a piston rod straightening device.

Background

The hydraulic cylinder is a very important driving part, is a final link for converting kinetic energy into specific actions, and has a very wide application range. The hydraulic cylinder consists of a cylinder barrel, a piston rod, a piston, an end cover and other parts, and part of the hydraulic cylinder with a larger long rod diameter is easy to be unstably bent due to the fact that the stroke of the hydraulic cylinder is larger and is influenced by factors such as dead weight and load eccentricity of the hydraulic cylinder in the use process, so that faults such as oil leakage and abnormal sound of the hydraulic cylinder are caused, and the cylinder barrel, the piston head and other parts of the hydraulic cylinder are complete in function and have repair value, and the hydraulic cylinder can be repaired only by straightening the piston rod. The existing piston rod straightening mechanism is usually straightened by manual experience in the straightening process, the straightening precision is low, and the straightening precision is required to be continuously checked in the straightening process, so that the straightening efficiency is low.

Disclosure of Invention

The utility model aims to overcome the technical problems and provide the piston rod straightening device which can effectively improve the straightening precision and the straightening efficiency.

In order to achieve the above object, the present utility model provides a piston rod straightening device including:

a platform base;

the straightening module is arranged on the platform base and is used for straightening the piston rod;

the deformation amount measuring module is arranged on the platform base and is used for measuring the deformation amount of the piston rod; and

and the calculation module is used for calculating the theoretical bending quantity of the piston rod according to the deformation quantity.

Optionally, the straightening module may include:

the first supporting piece and the second supporting piece are arranged on the platform base at intervals, and the first supporting piece and the second supporting piece are respectively provided with a piston rod supporting groove which is opened upwards;

the middle hold-down piece is arranged at the middle position between the first support piece and the second support piece and is used for fixing the piston rod downwards; and

and the jacking module is used for jacking the straightening piston rod upwards and comprises a first jacking mechanism and a second jacking mechanism, the first jacking mechanism is arranged between the first supporting piece and the middle pressing piece, and the second jacking mechanism is arranged between the second supporting piece and the middle pressing piece.

Further, the deflection measuring module comprises a movable thimble, a rotary thimble, a thimble motor and a dial indicator, wherein the movable thimble and the rotary thimble are correspondingly positioned on the outer sides of the first supporting piece and the second supporting piece and are used for inwards propping up the end part of the piston rod, the thimble motor is used for driving the rotary thimble to rotate, the movable thimble can move along a platform guide rail on the platform base to adjust the distance between the movable thimble and the rotary thimble, and the dial indicator is used for measuring the deflection of the piston rod propped up between the movable thimble and the rotary thimble.

Optionally, the first lifting mechanism and the second lifting mechanism may be jacks with heights lower than that of the piston rod supporting groove, and the lifting module further includes a hydraulic pump station for driving the first lifting mechanism and the second lifting mechanism to act;

or, the first lifting mechanism and the second lifting mechanism can be electric cylinders with heights lower than that of the piston rod supporting grooves, and the lifting module further comprises a servo motor for driving the first lifting mechanism and the second lifting mechanism to act.

Optionally, the middle hold-down piece and the jacking module can be arranged on a platform base, and the bottom of the platform base is provided with a roller;

and/or the intermediate hold down may comprise a V-shaped hold down with an opening down.

Further, the piston rod supporting groove may be a V-shaped groove.

In addition, the piston rod straightening device can further comprise a bending detection module for detecting the actual bending amount of the piston rod.

In addition, the piston rod straightening device may further include a control module, where the control module is respectively in communication with the straightening module, the calculating module, and the bending detection module, and the control module is configured to:

obtaining a theoretical bending amount and an actual bending amount of a piston rod;

and determining that the actual bending amount of the piston rod reaches the theoretical bending amount, and controlling the straightening module to stop.

Optionally, the piston rod straightening device may further comprise an alert device in communication with the control module, the control module being further configured to:

and determining that the actual bending amount of the piston rod reaches the theoretical bending amount, and triggering the warning device.

Further, the bending detection module may include a laser transmitter, a laser receiver, and a processor, where the processor may be capable of obtaining an actual bending amount of the piston rod based on laser signals from the laser transmitter and the laser receiver.

In addition, the piston rod straightening device can further comprise a vibration module for vibrating the straightened piston rod to eliminate residual stress of the piston rod.

The piston rod straightening device comprises a platform base, a straightening module, a deformation measuring module and a calculating module, wherein the straightening module is arranged on the platform base and is used for straightening a piston rod, the deformation measuring module is arranged on the platform base and is used for measuring the deformation of the piston rod, and the calculating module is used for calculating the theoretical bending amount of the piston rod according to the deformation. Before straightening, the deformation of the piston rod is measured through the deformation measuring module, and then the theoretical bending quantity of the piston rod is calculated through the calculating module, so that an operator can straighten the piston rod according to the theoretical bending quantity serving as a reference, the repeated straightening times are greatly reduced, the straightening time is shortened, and the straightening precision and the straightening efficiency of the piston rod are effectively improved.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

fig. 1 shows a schematic structural view of a piston rod straightening device according to an embodiment of the present utility model; and

fig. 2 shows an alignment flow chart of the piston rod alignment device of fig. 1.

Description of the reference numerals

1. First support for platform base 21

22. First climbing mechanism of second supporting piece 31

32. Intermediate hold-down piece of second jacking mechanism 4

51. Movable thimble 52 rotary thimble

53. 54 percent meter with thimble motor

8. Bending detection module 9 vibration module

10. Calculation Module 11 control Module

12. Hydraulic pump station

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions. The terms "front" and "rear" refer to the positional relationship of each part of the product with respect to the angle of use of the user, and the side closer to the user is "front" and the side farther from the user is "rear".

The utility model provides a piston rod straightening device which comprises a platform base 1, a straightening module, a deformation measuring module and a calculating module 10. The straightening module is arranged on the platform base 1 and used for straightening the piston rod, the deformation measuring module is arranged on the platform base 1 and used for measuring the deformation of the piston rod, and the calculating module 10 is used for calculating the theoretical bending amount of the piston rod according to the deformation. Before straightening, the deformation of the piston rod is measured through the deformation measuring module, and then the theoretical bending amount of the piston rod is calculated through the calculating module 10, so that an operator can straighten the piston rod according to the theoretical bending amount serving as a reference, the repeated straightening times are greatly reduced, the straightening time is shortened, the straightening precision and the straightening efficiency of the piston rod are effectively improved, and the production cost is reduced.

The calculation module 10 may calculate the theoretical buckling amount of the piston rod according to the deformation amount measured by the deformation amount measurement module and the specification data of the piston rod. The computing module 10 includes a display screen and a calculator. Specifically, empirical data of bending amounts and straightening effects of piston rods with different specifications are built in a calculation module to form a database. And before straightening, inputting the deformation and specification data of the piston rod to obtain the theoretical bending amount of the piston rod. Therefore, the straightening module can straighten the piston rod more accurately according to the theoretical bending amount, and the problems of repeated straightening and low efficiency are avoided.

As shown in fig. 1, the straightening module includes a first support 21, a second support 22, an intermediate hold-down 4, and a jacking module. The first support 21 and the second support 22 are spaced apart from each other on the platform base 1 and are provided with piston rod supporting grooves opened upward, and the piston rods can be supported on the first support 21 and the second support 22. The intermediate hold-down 4 is provided in an intermediate position between the first support 21 and the second support 22 and serves to fix the piston rod downwards. The jacking module is used for jacking up the straightening piston rod and comprises a first jacking mechanism 31 and a second jacking mechanism 32, wherein the first jacking mechanism 31 is arranged between the first supporting piece 21 and the middle pressing piece 4, and the second jacking mechanism 32 is arranged between the second supporting piece 22 and the middle pressing piece 4.

Specifically, when the piston rods need to be aligned, the deformed piston rods are first placed on the piston rod supporting grooves of the first and second supporting members 21 and 22, and then the highest points of the deformed piston rods are placed upward, and are fixed with the intermediate hold-down 4. The lifting door module is opened, and the first lifting mechanism 31 and the second lifting mechanism 32 are used for upwards supporting the piston rod, so that the piston rod is straightened.

Because the piston rod straightening device of this application adopts open structure, first support piece 21 and second support 22 upwards support the piston rod from both ends promptly to middle casting die 4 is from middle fixed piston rod downwards, and jacking module installs in the below and upwards jack-up alignment piston rod, so, can adjust the alignment position in real time according to the pole footpath and the length of piston rod, the alignment scope can cover the piston rod of the different pole footpath of all model hydro-cylinders of concrete pump truck, is suitable for the alignment operational scenario of prefabricated single, many specifications piston rod. And compared with the traditional straightening device using an oil press, the piston rod straightening device has a simple and compact structure, is suitable for straightening and maintaining the piston rod on a construction site, can timely straighten the piston rod on the construction site, and solves the problem that the conventional oil pressure straightening machine is heavy and difficult to timely repair on the construction site. And moreover, the piston rod straightening device is simple and compact in structure, can realize quick transfer, and effectively solves the problem of long maintenance period caused by transfer.

The boom hydraulic cylinder piston rod of the concrete pump truck has larger rod diameter and length-diameter ratio, the boom is frequently used under high load, and the boom hydraulic cylinder piston rod is easy to be unstably bent and bears larger dead weight, working load, unbalanced load inertia force and other loads. Therefore, in some embodiments of the present application, the first lifting mechanism 31 and the second lifting mechanism 32 are jacks with a height lower than that of the piston rod supporting groove, and the lifting module further includes a hydraulic pump station 12, a hydraulic control valve, a rubber tube, a sensor, and the like for driving the first lifting mechanism 31 and the second lifting mechanism 32 to act, so as to provide hydraulic energy for the jacks. Like this, the piston rod coalignment of this application owing to adopted hydraulic pump station to cooperate 2 ultra-thin jacks to carry out the coalignment, has effectively solved concrete pump truck big pole footpathAbove) piston rod alignment problems.

Alternatively, in other embodiments, in order to make the piston rod straightening device more environment-friendly, energy-saving and convenient, the first jacking mechanism 31 and the second jacking mechanism 32 may be electric cylinders with heights lower than that of the piston rod supporting groove, and the jacking module further includes a servo motor for driving the first jacking mechanism 31 and the second jacking mechanism 32 to act.

Alternatively, the piston rod supporting groove may be a V-shaped groove, and the intermediate hold-down 4 may include a V-shaped pressure plate provided with an opening downward. Like this, the piston rod coalignment of this application passes through open structure cooperation V type groove, can be according to piston rod footpath and length real-time adjustment, and the piston rod of all hydro-cylinders different footpath of alignment scope full coverage concrete pump truck is suitable for the single, the many specifications piston rod coalignment of refabrication.

In addition, as shown in fig. 1, the deformation measuring module includes a movable thimble 51, a rotary thimble 52, a thimble motor 53, and a dial indicator 54. The movable thimble 51 and the rotary thimble 52 are correspondingly positioned outside the first support member 21 and the second support member 22 and are used for propping the end parts of the piston rods inwards. The thimble motor 53 is used for driving the rotary thimble 52 to rotate, thereby realizing the rotation of the piston rod. The movable thimble 51 can move along a platform rail on the platform base 1 to adjust the distance from the rotating thimble 52. The dial indicator 54 is used for measuring the deformation of the piston rod which is pressed between the movable thimble 51 and the rotary thimble 52. Specifically, the rotary thimble 52 is connected with a speed regulating motor, the movable thimble 51 is connected with a platform guide rail, the piston rod is fixed and clamped through the movable thimble 51 and the rotary thimble 52, the piston rod is driven to rotate by the thimble motor 53, and the deformation is measured through the dial indicator 54. After the measurement is completed, the movable thimble 51 and the rotary thimble 52 are released, and the piston rod falls back onto the first support 21 and the second support 22. Therefore, the high point and the low point of the piston rod can be measured according to the deformation measuring module, and the jacking module can jack the correcting piston rod from the lower part of the platform base 1, so that the piston rod can be straightened.

In addition, the middle hold-down piece 4 and the jacking module can be arranged on the platform base 1, and the bottom of the platform base 1 is provided with rollers, so that the piston rod straightening device is better in mobility and more convenient to use. And a protecting device can be additionally arranged outside the piston rod straightening device, or the protecting device can be additionally arranged on the platform base.

Further, the piston rod straightening device may further comprise a bending detection module 8 for detecting the actual amount of bending of the piston rod. The bending detection module 8 comprises a laser transmitter, a laser receiver and a processor, wherein the processor can obtain the actual bending amount of the piston rod according to laser signals of the laser transmitter and the laser receiver. The processor comprises a signal processing module, a calculator, a communication interface and a memory which are connected with a power supply. Specifically, laser transmitter transmission laser irradiates piston rod and laser receiver, and the actual bending quantity of piston rod is measured to the processing signal of processor receipt laser signal, and the measurement data degree of accuracy is high, and the measurement is simple, convenient operation. The specific structure and principle of the bending detection module 8 are well known to those skilled in the art, and will not be described in detail herein.

Still further, the piston rod straightening device may further comprise a control module 11, wherein the control module 11 is in communication with the straightening module, the calculating module 10 and the bending detection module 8, respectively. The control module 11 is configured to: obtaining a theoretical bending amount and an actual bending amount of a piston rod; and determining that the actual bending amount of the piston rod reaches the theoretical bending amount, and controlling the straightening module to stop, namely controlling the first lifting mechanism 31 and the second lifting mechanism 32 to stop. In the straightening process of the piston rod, the control module 11 receives actual bending quantity data and theoretical bending quantity data of the piston rod, and when the bending detection module 8 detects that the actual bending quantity of the piston rod reaches the theoretical bending quantity, the control module 11 controls the straightening module to stop working, namely controls the jacking module to stop jacking.

Furthermore, the piston rod straightening device may comprise warning means in communication with the control module 11. At this time, the control module 11 is further configured to: determining that the actual bending degree of the piston rod reaches the theoretical bending amount, and triggering the warning device to send out a warning signal.

The piston rod straightening device is innovatively added with a vibration module 9, and the vibration module 9 is used for vibrating the straightened piston rod to remove residual stress of the piston rod. Specifically, the vibration module 9 includes a vibration exciter, an acceleration signal conditioner, a displacement signal conditioner, a speed signal conditioner, a current signal conditioner, a data collector, and a controller. The vibration exciter can be connected with the piston rod, and residual stress of the piston rod is removed by vibrating the piston rod. The vibration exciter is respectively in communication connection with the acceleration signal conditioner, the displacement signal conditioner, the speed signal conditioner, the current signal conditioner and the data acquisition device so as to perform corresponding vibration treatment on piston rods with different specifications. In the straightening process, the vibration exciter vibrates the piston rod, external force generated by the vibration exciter borne by the piston rod is superposed with internal residual stress of the piston rod, and when the superposed sum is greater than or equal to the yield limit value of the piston rod, the internal part of the piston rod is subjected to tiny plastic deformation, so that the residual stress in the piston rod is reduced or homogenized, and rebound of the piston rod after straightening is prevented. Of course, instead of the vibration module 9, a manual tap or sonic vibration or the like may be used to remove the residual stress of the piston rod.

Specifically, as shown in fig. 2, the piston rod straightening process of the piston rod straightening device of the present application is as follows:

(1) the piston rod is fixed through a movable thimble 51 and a rotary thimble 52, a middle frame dial indicator 54 measures a jumping value, detects the deformation of the piston rod, and records the highest point and the low point;

(2) the deformation data is manually input into a calculation module 10 to generate theoretical bending amount data;

(3) the control module 11 automatically collects bending amount data;

(4) loosening the movable thimble 51 and the rotary thimble 52 to enable the piston rod to fall on the first supporting piece 21 and the second supporting piece 22, placing the highest recorded point upwards, fixing the upper part by adopting the middle pressing piece 4, starting the hydraulic pump station 12, enabling the first jacking mechanism 31 and the second jacking mechanism 32 which are positioned on the platform base 1 to push the piston rod upwards, and starting the straightening;

(5) the bending detection module 8 detects that the bending amount of the piston rod reaches a theoretical value;

(6) data are transmitted to the control module 11, and the hydraulic pump station is controlled to stop working and straightening is stopped through a sensor on the hydraulic pump station 12;

(7) starting a vibration module 9, and starting vibration to remove residual stress;

(8) the piston rod is fixed on the movable thimble 51 and the rotary thimble 52 again, and the jump is detected;

(9) and (5) qualified jumping and finishing straightening.

To sum up, the piston rod straightening mode innovation of piston rod straightener of this application, traditional hydraulic press is from last down to push down the piston rod for utilizing the pneumatic cylinder, and the gyro wheel alignment distributes the gyro wheel around the piston rod, through gyro wheel extrusion alignment. The piston rod is corrected according to the high point and the low point measured by the deformation of the piston rod, the piston rod is bent from the lower part of the platform, the straightening mode is changed, the straightening device is simple in structure, compared with a traditional oil pressure straightening machine, the quick transfer can be realized, the straightening device is suitable for straightening and maintaining the piston rod on a construction site, and the problem that the maintenance period is long due to transfer is effectively solved. Firstly, automatic detection and data transmission can be realized through piston rod deformation detection. And moreover, a calculation module 10 and a database of the deformation amount and the bending amount of the piston rod are configured, the theoretical bending amount of the piston rod can be obtained by inputting the deformation amount and specification data of the piston rod before straightening, the data are transmitted to a control module 11, the straightening precision is high, and the problem of low repeated straightening efficiency is avoided. In addition, through configuration control module 11, in the piston rod alignment in-process, receive piston rod crookedness data and theoretical crookedness data by control module 11, when crookedness detection module detects that the piston rod reaches the theoretical volume of buckling, trigger warning device and stop jacking module work, effectively prevent to straighten excessive, cause piston rod intensity to reduce. In addition, through configuration crookedness detection module 8, the measurement data degree of accuracy is high, and the measurement is simple, convenient operation.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (8)

1. A piston rod straightening device, characterized in that the piston rod straightening device comprises:

a platform base (1);

the alignment module sets up on platform base (1) and is used for the alignment piston rod, the alignment module includes:

the first supporting piece (21) and the second supporting piece (22) are arranged on the platform base (1) at intervals, and the first supporting piece (21) and the second supporting piece (22) are respectively provided with a piston rod supporting groove which is opened upwards;

an intermediate hold-down (4) provided at an intermediate position between the first support (21) and the second support (22) and for fixing a piston rod; and

the jacking module is used for jacking the straightening piston rod upwards and comprises a first jacking mechanism (31) and a second jacking mechanism (32), the first jacking mechanism (31) is arranged between the first supporting piece (21) and the middle pressing piece (4), and the second jacking mechanism (32) is arranged between the second supporting piece (22) and the middle pressing piece (4);

the deformation measuring module is arranged on the platform base (1) and used for measuring the deformation of the piston rod, the deformation measuring module comprises a movable thimble (51), a rotary thimble (52), a thimble motor (53) and a dial indicator (54), the movable thimble (51) and the rotary thimble (52) are correspondingly positioned on the outer sides of the first supporting piece (21) and the second supporting piece (22) and are used for propping up the end part of the piston rod inwards, the thimble motor (53) is used for driving the rotary thimble (52) to rotate, the movable thimble (51) can move along a platform guide rail on the platform base (1) to adjust the distance between the movable thimble and the rotary thimble (52), and the dial indicator (54) is used for measuring the deformation of the piston rod; and

and the calculation module (10) is used for calculating the theoretical bending quantity of the piston rod according to the deformation quantity.

2. The piston rod straightening device according to claim 1, characterized in that the first lifting mechanism (31) and the second lifting mechanism (32) are jacks, and the lifting module further comprises a hydraulic pump station (12) for driving the first lifting mechanism (31) and the second lifting mechanism (32) to act;

or, the first jacking mechanism (31) and the second jacking mechanism (32) are electric cylinders, and the jacking module further comprises a servo motor for driving the first jacking mechanism (31) and the second jacking mechanism (32) to act.

3. The piston rod straightening device according to claim 1, characterized in that the intermediate hold-down piece (4) and the jacking module are both arranged on the platform base (1), and the bottom of the platform base (1) is provided with rollers;

and/or the middle pressing piece (4) comprises a V-shaped pressing plate with a downward opening;

and/or, the piston rod supporting groove is a V-shaped groove.

4. A piston rod straightening device according to claim 1, characterized in that the piston rod straightening device further comprises a bending detection module (8) for detecting the actual amount of bending of the piston rod.

5. A piston rod straightening device according to claim 4, characterized in that it further comprises a control module (11), which control module (11) is in communication with the straightening module, the calculation module (10) and the bending detection module (8), respectively, the control module (11) being configured to:

acquiring the theoretical bending amount and the actual bending amount;

and determining that the actual bending amount reaches the theoretical bending amount, and controlling the straightening module to stop.

6. The piston rod straightening device according to claim 5, characterized in that the piston rod straightening device further comprises an alarm device in communication with the control module (11), the control module (11) being further configured to:

and determining that the actual bending quantity reaches the theoretical bending quantity, and triggering the warning device.

7. A piston rod straightening device according to claim 4, characterized in that the bending detection module (8) comprises a laser transmitter, a laser receiver and a processor, which processor is capable of deriving the actual bending amount of the piston rod from the laser signals of the laser transmitter and the laser receiver.

8. A piston rod straightening arrangement according to any of the claims 1-7, characterized in that the piston rod straightening arrangement further comprises a vibration module (9) for vibrating the straightened piston rod to relieve residual stress of the piston rod.