KR20120055257A - The large bolts hydraulic fastening device - Google Patents

Abstract

PURPOSE: An automatic hydraulic tightening apparatus for large-sized bolts is provided to improve quality of tightening fluid pressure by operating a hydraulic pump according to the fluid pressure of working fluids applied to an actuator. CONSTITUTION: An automatic hydraulic tightening apparatus for large-sized bolts comprises a hydraulic pump(110), an electric motor(120), a control valve unit(130), a gauge unit(160), an actuator(40), a displacement measuring unit(300), and controller(220). The hydraulic pump discharges working fluids by generating fluid pressure. The electric motor operates the hydraulic pump. The control valve unit discharges the working fluids and controls drain progress of the working fluids through an electronic control. The gauge unit outputs digital signals by calculating the pressure of the working fluids discharged from the control valve unit. The actuator applies tensile forces to large sized bolt(36) by being supplied with the working fluids discharged from the control valve unit. The displacement measuring unit detects a change of a length of the large sized bolt and transmits a detected value by wireless. The controller controls a driving level of the electric motor by receiving the detected value from the displacement measuring unit and the digital signals of the gauge unit.

Description

Large bolts hydraulic fastening device

The present invention relates to a large bolt hydraulic automatic fastening device, and more specifically, a tension force acts on a large bolt when fastening and fixing a component by a large bolt in a diesel engine of a ship, a power generation facility of a power plant, a machine tool, a construction site, and the like. It relates to a large bolt hydraulic automatic fastening device to improve the fastening force of the components.

In general, in the diesel engine of ships, power generation facilities of power plants, machine tools, construction sites, and the like can be fastened and fixed by large bolts, such large bolts can not be tightened by manpower and thus use mechanical power.

As the mechanical power described above, a hydraulic apparatus may be used as an example, and the hydraulic apparatus may be coupled to the nut in the pulled state of the above-mentioned large bolt and remove the tension force acting on the large bolt, thereby causing the large bolt to contract and the nut. The pressing force between components is improved to prevent the nut from loosening and the components are fastened and fixed.

Although the marine engine is described as an example of the above-mentioned large bolt and the component to be fastened, the present invention is not limited thereto and may be applied to an industrial field in which the bolt is fastened to assemble the component.

An example in which the above-mentioned large bolt is fastened will be described with reference to FIGS. 1 to 5.

1 is a view for explaining a fastening example of a large bolt, Figure 2 is a view for explaining a hydraulic fastening device for applying a tensile force to a large bolt, Figure 3 is to fasten a large bolt using a hydraulic fastening device Figure 4 is a view for explaining the process, Figure 4 is a view for explaining a conventional large bolt hydraulic fastening device, Figure 5 is a view for explaining a hydraulic circuit for actuating the hydraulic pressure to the actuator in the conventional large bolt hydraulic fastening device. .

As shown in FIG. 1, the ship engine 10 is assembled using mechanical power since the size of each component is large and a manual tool by manpower cannot apply a fastening force to the corresponding fastening portion.

As an example, when the connecting rod 20 is fastened to the crankshaft 30, a large bolt 36 penetrates the fixing part 32 and the fastening part 34, and a nut ( 38) is fastened.

At this time, in order to improve the binding force between the fixing part 32 and the fastening part 34, the nut 38 is fastened in a state in which the above-mentioned large bolt 36 is tensioned, and the tension force acting on the large bolt 36 is released. When the large bolt 36 is contracted by this, the nut 38 applies a compressive force to the fastening component 34 to improve the binding force between the fixed component 32 and the fastening component 34.

The above-mentioned tensile force may be used actuator 40 by the hydraulic action.

The above-described actuator 40 will be described with reference to FIG. 2.

As shown in FIG. 2, in the actuator 40, a piston 44 is disposed above the cylinder housing 42, and a chamber 46 is formed inside the cylinder housing 42 described above.

In addition, the piston 44 is provided with a pressure port 48 for applying hydraulic pressure to the chamber 46 described above.

In addition, an internal thread 45 may be formed at the inner diameter of the piston 44, and may be fastened to an end of the large bolt 36 described above.

In addition, the supporter ring 43 is disposed below the cylinder housing 42, and the supporter ring 43 is disposed on the outer circumference of the nut 38 and is disposed to contact the surface of the fastening component 34. .

The operation of the above-described actuator 40 will be described with reference to FIG. 3.

As shown in FIG. 3A, the actuator 40 is installed at the end of the large bolt 36 to stand by, and then the hydraulic pressure acts through the above-described pressure port 48 to supply the hydraulic pressure to the chamber 46. The pressure becomes cold.

As shown in FIG. 3 (b), the piston 44 is pushed out of the cylinder housing 42 by the above-mentioned hydraulic pressure, and in this process, the end of the large bolt 36 described above is pulled to exert a tensile force. do.

Proper tensile force is applied to the large bolt 36 to increase the length of the large bolt 36 so that the lower side of the nut 38 is spaced apart from the surface of the fastening part 34 or between the nut 38 and the fastening part 34. Adhesion is attenuated.

Thereafter, as shown in FIG. 3C, the nut 38 is tightened using the tool 39, whereby the nut 38 and the fastening part 34 are brought into close contact with each other.

Then, as shown in (d) of FIG. 3, when the hydraulic pressure applied to the actuator 40 is removed, the piston 44 moves to the inside of the cylinder housing 42, whereby the tensile force applied to the large bolt 36 is It acts on the nut 38 to bring the nut 38 into tight contact with the fastening component 34.

That is, the nut 38 is in close contact with the fastening component 34 by the shrinkage stress to restore the large bolt 36 to the initial length, thereby preventing the nut 38 from loosening.

Although the above-mentioned large bolt 36 has been described as an example of assembling the connecting rod 20, the above-described large bolt 36 is composed of several such as a cylinder cover, a piston rod, a bad plate and a cylinder frame, and various bearing cap assemblies. At least two actuators 40 may be installed in each of the large bolts 36, and the plurality of large bolts 36 may be fastened by simultaneously hydraulically acting on the respective actuators 40. The accompanying drawings will be described with reference to FIG. 4.

As shown in FIG. 4, a plurality of large bolts 36 may be provided with actuators 40, and each actuator 40 is connected to the distribution unit 180 to receive hydraulic pressure.

The hydraulic pressure acting on the actuator 40 described above can be made by the configuration of the hydraulic circuit, which will be described with reference to FIGS. 4 and 5.

An oil tank 100 containing oil, a hydraulic pump 110 for generating oil pressure by pumping oil from the oil tank 100 described above, and controlling whether to discharge and drain hydraulic pressure generated from the hydraulic pump 110 described above. The manual control valve unit 132, a distribution block 150 installed on one side of the manual control valve unit 132 described above to distribute and discharge hydraulic oil, and measure the pressure of the hydraulic pressure discharged from the distribution block 150 described above. The analog pressure gauge unit 162 displayed on the needle scale, the manual operation pressure switch 170 for setting the hydraulic pressure discharged from the above-described distribution block 150 to a desired pressure, and the above-described distribution block 150. It is configured to include a distribution unit 180 to distribute the hydraulic fluid to the plurality of actuators 40, and a power unit 210 to supply power to the hydraulic pump 110 described above.

In addition, the above-described hydraulic pump 110 is provided with a high pressure output unit 122a and a low pressure output unit 122b for generating high pressure oil pressure and low pressure oil pressure in the electric motor 120, respectively, and the high pressure output unit 122a. One side of the high pressure control unit 124a is arranged to drain a part of the hydraulic oil to the oil tank 100 when it is higher than the set high pressure.

In addition, a low pressure control unit 124b is disposed on one side of the above-described low pressure output unit 122b to drain a part of the hydraulic oil to the oil tank 100 when it is higher than the set low pressure pressure.

In addition, the hydraulic oil discharged from the above-described high pressure output unit 122a and the low pressure output unit 122b is provided to the manual control valve unit 132, and to prevent a back flow of the hydraulic oil at the inlet side of the water bottle control valve unit 132. A check valve 134 is provided.

The operation of the hydraulic pump 110 described above will be described in more detail.

1) 1st stage (Pressure: 70 ~ 100bar & 11L / Min.)

The shafts of the electric motor 120, the high pressure output unit 122a (piston pump) and the low pressure output unit 122b (gear pump) are connected to each other, and when the electric motor 120 is driven, the above-described high pressure output unit 122a and the above-described high pressure output unit 122a are connected. The low pressure output unit 122b is driven at the same time.

Subsequently, when the electric motor 120 is driven, the low pressure output unit 122b sucks hydraulic oil from the oil tank 100 to discharge 70-100 bar pressure oil toward the high pressure output unit 122a and the manual control valve unit 132. The high pressure output unit 122a is discharged with a pressure oil of approximately 3,000 bar so that the pressure oil of 70-100 bar is finally provided to the actuator 40 at approximately 11 L / Min.

2) 2 stages (Pressure: 100 ~ 3,000bar & 11L / Min.)

When the hydraulic pressure of the above-mentioned hydraulic oil reaches 70 to 100 bar, the low pressure control unit 124b acts so that the pressure oil discharged from the low pressure output unit 122b is drained, and only the pressure oil discharged from the high pressure output unit 122a to the actuator 40. Is provided.

3) 3 stages (Pressure: 3,000bar & 1L / Min.)

When the hydraulic pressure reaches approximately 3,000 bar, the high pressure control unit 124a is operated so that the pressure oil discharged from the high pressure output unit 122a is drained, and the pressure oil discharged by the check valve 134 is the hydraulic system of the hydraulic pump 110. The pressure in the hydraulic circuit is reduced to the pressure of the actuator 40 at this time.

4) 2,200 bar operation (Pressure: 2,200 bar & 1L / Min.)

When the hydraulic pump 110 is set to 2,200 bar, when the hydraulic pressure reaches approximately 2,200 bar, the electric motor 120 is stopped by the manual operation pressure switch 170 and the check valve 134 prevents the back flow of the working oil. When the pressure of the hydraulic fluid drops to the low setting value of the manual operation pressure switch 170, the first and second steps described above are repeatedly operated until the pressure reaches 2,200 bar.

The manual control valve unit 132 described above is to provide the hydraulic fluid to the actuator 40 by the operator's manual operation.

In addition, an analog pressure gauge 162 for displaying the pressure of the hydraulic oil is disposed at the outlet side of the manual control valve unit 132 described above.

Further, on the outlet side of the manual control valve unit 132, a manual pressure switch 170 is set to set the desired hydraulic pressure and to control the power unit 210 when a hydraulic pressure outside the set hydraulic pressure is detected. .

The conventional large bolt hydraulic fastening device configured as described above works as follows.

One worker sets the desired hydraulic pressure in the manual operation pressure switch 170, the other worker installs the actuator 40 in the large bolt 36, another operator operates the hydraulic pump 110 .

Thereafter, the hydraulic pressure is applied to the actuator 40 to tension the large bolt 36, and at this time, while visually watching the analog pressure gauge 162, the meter checks whether the set pressure has been reached and notifies the operator of the hydraulic pump 110 by nurturing. .

Thereafter, the operator of the hydraulic pump 110 stops the operation of the hydraulic pump 110, the operator of the actuator 40 side after tightening the nut 38 to inform the operator of the hydraulic pump 110 again.

After the tightening of the nut 38, the operator of the hydraulic pump 110 operates the manual control valve unit 132 to wait for a time for the hydraulic oil in the hydraulic pump 110 to be drained into the oil tank 100.

That is, the conventional large bolt hydraulic fastening device described above requires a large number of workers to cooperate with many workers.

In addition, the diesel engine mounted on the ship is very large and the working site does not hear easily raised due to other noise, causing a problem of malfunction.

In addition, even when the proper hydraulic pressure is reached, the upbringing may not be properly transmitted, and high pressure may be generated. When abnormal high pressure hydraulic pressure occurs, a large bolt may be damaged as well as a risk of a safety accident of an operator.

In addition, a hunting phenomenon may occur due to the actual pressure difference between the hydraulic pressure on the discharge side of the hydraulic pump 110 and the actuator 40, and the hunting phenomenon may include the hydraulic pump 110 of the mechanical mechanism to which the hydraulic pressure is applied. There is a problem that causes a malfunction.

The hunting phenomenon described above is further described as follows.

When operating the hydraulic pump 110 by setting the operation of the pump to the high point set value and the low point set value in advance, the difference between the high point set value and the low point set value is small, the actuator 40 side and the manual operation pressure switch 170 If the hydraulic pressure difference on the) side is large, the pressure of the actuator 40 does not reach the high point pressure of the manual operation pressure switch 170 and the electric motor 120 is turned off at the high point. The phenomenon that the electric motor 120 repeats On again when the pressure drops to the low point occurs more than once per second is called a hunting phenomenon.

On the other hand, manpower is wasted by measuring hydraulic pressure in an analog manner and manually operating various switches. In particular, an error occurs when the pressure is read, and a lot of labor is required because it is accompanied by repetitive manual operation for precise pressure output adjustment. There is a problem that is, the quality of the fastening quality is lowered and the risk of large accidents due to this.

On the other hand, when the length of the large bolt 36 is changed by the actuator 40 described above, a displacement measuring unit is used to measure the change displacement, and the detection value measured by the displacement measuring unit described above is passive. As it is collected and processed as information, there is an inefficient problem of work, and there is a high risk of a missing connection due to a mistake in work management by a person.

On the other hand, since the pressure must be removed from the above-described actuator 40, all workers have to wait for a predetermined time until the hydraulic oil is drained and the pressure is removed, and the oil remaining in the actuator 40 by the atmospheric pressure is removed. Since the piston 44 of the actuator 40 must be manually rotated by using a steel pipe to remove, the inefficiency of the operation becomes a problem, and the risk in the safety of the operation is very high.

Therefore, the technical problem to be achieved by the present invention is to operate by a single operator in operating a large bolt hydraulic fastening device, large bolt hydraulic pressure to increase the stability and reduce the labor labor in hydraulic fastening large bolts The purpose is to provide an automatic fastening device.

Another object of the present invention is to output the hydraulic pressure of the hydraulic oil acting on the actuator as a digital signal and to operate the hydraulic pump precisely based on the digital signal, large bolt hydraulic pressure to optimally apply the tension force applied to the large bolt The purpose is to provide an automatic fastening device.

Another object of the present invention is to control the performance of the electric hydraulic pump using an inverter to actively respond to the hunting phenomenon caused by the difference in the actual pressure applied to the outlet side of the hydraulic pump and the actuator to improve the durability of the large bolt hydraulic tightening device It is an object of the present invention to provide a large bolt hydraulic automatic fastening device for improvement.

Still another object of the present invention is to provide a large bolt hydraulic automatic fastening device which shortens the time required for hydraulic fastening of large bolts and increases work safety by quickly draining hydraulic oil by a vacuum pump when the pressure is removed from the actuator. The purpose is to provide.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. There will be.

Large bolt hydraulic automatic fastening device according to the present invention for achieving the above technical problem, the hydraulic pump for generating hydraulic pressure to discharge the hydraulic oil; An electric motor for driving the hydraulic pump; A control valve unit for controlling the discharge of the hydraulic oil and the progress of draining the hydraulic oil discharged from the hydraulic pump by electronic control; A digital pressure gauge unit for measuring the hydraulic pressure of the hydraulic oil discharged from the control valve unit and outputting it as a digital signal; An actuator provided with hydraulic oil discharged from the control valve unit to exert a tensile force on the large bolt; A displacement measuring unit installed in the actuator for detecting a change in length of the large bolt and transmitting the detected value wirelessly; And a control unit configured to receive a digital signal output from the digital pressure gauge unit and a detection value output from the displacement measurement unit to control driving strength and weakness of the electric motor.

The apparatus may further include a vacuum pump installed at one side of the control valve unit to generate a vacuum to assist drainage of the hydraulic oil in the actuator.

The apparatus may further include an inverter installed at one side of the control unit to generate a signal for controlling the driving strength and weakness of the electric motor.

The apparatus may further include a terminal unit configured to wirelessly communicate with the control unit to remotely control the control unit.

In addition, the terminal unit, the driving status of the hydraulic pump, the amount of length displacement of the large bolt and the pressure value of the hydraulic oil provided to the actuator may be displayed so that the large bolt hydraulic fastening process can be grasped.

In addition, the displacement measurement unit, the housing is provided on one side of the actuator; A probe tip provided inside the housing to detect a change in length of the large bolt; A sensing unit provided in the housing to detect displacement of the probe tip; A communication unit provided inside the housing to wirelessly transmit the detected detection value detected by the sensing unit; A battery unit provided in the housing to provide power to the sensing unit and the communication unit; And a terminal panel provided at one side of the housing to connect the battery unit with an external power source to charge the battery unit.

The apparatus may further include a temperature sensor provided inside the housing to detect an ambient temperature of the actuator, the terminal panel comprising: a first connection terminal for grounding; A second connection terminal configured to output a temperature detection value detected by the temperature sensor; A third connecting terminal configured to turn on the power of the displacement measuring unit; And a fourth connection terminal configured to supply power to the battery unit.

In addition, a pocket formed to accommodate the displacement measuring unit; A charging unit having a fifth, sixth, seventh and eighth connection terminals formed in the pocket to be connected to the first, second, third and fourth connection terminals, respectively; And a connecting sensing unit disposed in the displacement measuring unit to detect that the displacement measuring unit is accommodated in the pocket and to start battery charging and data transmission operation.

In addition, a plurality of pockets are provided with a plurality of displacement measuring unit is formed so that a plurality of displacement measuring unit is accommodated; A multi-charging unit having a fifth, sixth, seventh and eighth connection terminals respectively connected to the first, second, third and fourth connection terminals respectively in the plurality of pockets; And a connecting sensing unit disposed in the displacement measuring unit to detect that the displacement measuring unit is accommodated in the pocket and to start battery charging and data transmission operation.

Specific details of other embodiments are included in the detailed description and the drawings.

The large bolt hydraulic automatic fastening device according to the present invention made as described above can be operated by a single operator in operating the large bolt hydraulic automatic fastening device, and in particular, the operator who operates the actuator has a hydraulic pressure of the measured hydraulic fluid. Correspondingly, by controlling the hydraulic pump remotely, it is possible to increase stability and reduce labor.

In addition, the large bolt hydraulic fastening device according to the present invention, by outputting the hydraulic pressure of the hydraulic oil acting on the actuator as a digital signal and operating the hydraulic pump based on the digital signal can be optimally applied to the tension force applied to the large bolt. This can improve the quality of hydraulic fastening of large bolts.

In addition, the large bolt hydraulic fastening device according to the present invention, by controlling the performance of the electric hydraulic pump using an inverter to automatically respond to the hunting phenomenon caused by the difference in the actual pressure applied to the outlet side of the hydraulic pump and the actuator large bolt The durability of the hydraulic fastening device can be improved.

In addition, the large bolt hydraulic fastening device according to the present invention can shorten the time required for hydraulic fastening of the large bolts by quickly draining the hydraulic oil by a vacuum pump when the pressure is removed from the actuator, and improves the safety of the work. It can increase.

1 is a view for explaining an example of fastening large bolts.
2 is a view for explaining a hydraulic fastening device for applying a tensile force to a large bolt.
3 is a view for explaining the process of fastening a large bolt using a hydraulic fastening device.
4 is a view for explaining a conventional large bolt hydraulic fastening device.
5 is a view for explaining a hydraulic circuit for applying hydraulic pressure to the actuator in the conventional large bolt hydraulic fastening device.
6 is a view for explaining a large bolt hydraulic automatic fastening device according to an embodiment of the present invention.
7 is a view for explaining a hydraulic circuit for applying hydraulic pressure to the actuator in the large bolt hydraulic automatic fastening device according to an embodiment of the present invention.
8 is a view for explaining a displacement measuring unit for measuring the displacement of the large bolt in the large bolt hydraulic automatic fastening device according to an embodiment of the present invention.
9 is a view for explaining a charging unit to charge and receive the displacement measuring unit in the large bolt hydraulic automatic fastening device according to an embodiment of the present invention.
10 is a view for explaining a multi-charging unit to charge and receive a plurality of displacement measuring unit in a large bolt hydraulic automatic fastening device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

Throughout the specification, the same reference numerals refer to the same components, the same reference numerals are assigned to the same components as the conventional components, and detailed description thereof will be omitted.

Hereinafter, a large bolt hydraulic automatic fastening device according to an embodiment of the present invention will be described with reference to FIGS. 5 to 8.

Accompanying drawings Figure 6 is a view for explaining a large bolt hydraulic automatic fastening device according to an embodiment of the present invention, Figure 7 is to operate the hydraulic pressure in the actuator in the large bolt hydraulic automatic fastening device according to an embodiment of the present invention 8 is a view for explaining a hydraulic circuit, Figure 8 is a view for explaining a displacement measuring unit for measuring the displacement of a large bolt in a large bolt hydraulic automatic fastening device according to an embodiment of the present invention.

The large bolt hydraulic fastening device according to an embodiment of the present invention is the hydraulic circuit system for generating the hydraulic pressure and the actuator 40 and the above-mentioned actuator 40 to operate by the pressure of the hydraulic oil discharged from the above-described hydraulic circuit system It comprises a displacement detection unit 300 for detecting a change in the length of the large bolt 36 by the operation of.

In more detail,

The above-described hydraulic circuit system is discharged from the hydraulic pump 110 for generating high pressure and low pressure hydraulic pressure to discharge hydraulic oil, the electric motor 120 for driving the hydraulic pump 110 described above, and the hydraulic pump 110 described above. The hydraulic oil is installed in the control valve unit 130 and the control valve unit 130 and the control valve unit 130 as described above to control the discharge of the hydraulic oil by the electronic control, and generate a vacuum to drain the hydraulic oil in the above-described actuator 40. The vacuum pump 140 to assist the progress, the digital pressure gauge unit 160 for measuring the hydraulic pressure of the hydraulic oil discharged from the control valve unit 130 described above and outputting it as a digital signal and the digital pressure gauge unit 160 described above. The control unit 220 receives the digital signal and the detection value output from the displacement measurement unit 300 described above to control the driving strength and weakness of the electric motor 120 described above. It is configured to hereinafter.

The displacement measuring unit 300 described above is installed in the actuator 40 described above to detect the change in the length of the large bolt 36 and to wirelessly transmit the detected value.

Meanwhile, the inverter 230 may be further installed on one side of the above-described control unit 220, and the above-described inverter 230 generates a signal for controlling the driving strength and weakness of the above-described electric motor 120.

In addition, the terminal unit 400 may be further provided to wirelessly communicate with the above-described control unit 220 to remotely control the above-described control unit 220.

The above-described terminal unit 400 displays the driving situation of the hydraulic pump 110 described above, the amount of length displacement of the large bolt 36 described above, the pressure value of the hydraulic oil provided to the actuator 40 described above, and the like. This is to understand the bolt hydraulic tightening process.

The terminal unit 400 may be provided as a dedicated terminal, but a communication device may use a communication function such as a laptop computer, a smartphone, etc., which is a commercial product.

On the other hand, the displacement measuring unit 300 described above is provided inside the housing 310 provided on one side of the actuator 40 and the housing 310 described above to detect the change in length of the large bolt 36 described above. Probe tip 320, the sensing unit 330 is provided in the interior of the housing 310 described above to detect the displacement of the probe tip 320, the above-described sensing is provided in the housing 310 The communication unit 370 for transmitting the detected detection value detected by the unit 330 wirelessly is provided inside the housing 310 to power the sensing unit 330 and the communication unit 370 described above. The terminal panel 350 is provided at one side of the battery unit 340 and the housing 310 to provide the battery unit 340 to be connected to an external power source to charge the battery unit 340 described above. It is configured to include.

A dog 322 may be installed at one side of the probe tip 320, and the probe tip 320 and the dog 322 may be linearly moved by the action of the actuator 40 described above. The unit 330 detects the position of the dog 322 described above.

On the other hand, the above-described displacement measuring unit 300 may further include a temperature sensor 332 provided inside the housing 310 to detect the ambient temperature of the actuator described above.

In addition, the terminal panel 350 described above includes a first connection terminal 351 for grounding, a second connection terminal 352 for outputting the temperature detection value detected by the temperature sensor 332 described above, and the displacement measurement described above. And a third connection terminal 353 to turn on the power of the unit 300 and a fourth connection terminal 353 to supply power to the battery unit 340 described above.

The above-described displacement measuring unit 300 is stored in the storage and can be charged during storage, which will be described with reference to FIGS. 9 and 10.

9 is a view for explaining a charging unit 500 to charge and accommodate the displacement measuring unit 300 in the large bolt hydraulic automatic fastening device according to an embodiment of the present invention, Figure 10 is a view of the present invention A diagram for describing a multi charging unit 600 for charging and accommodating a plurality of displacement measuring units in a large bolt hydraulic automatic fastening device according to an embodiment.

As illustrated in FIG. 9, the charging unit 500 may have a pocket 510 formed to accommodate the above-described displacement measuring unit 300 to store and store one displacement measuring unit 300.

In addition, the fifth, sixth, seventh, and eighth connection terminals 511, 512 (to be connected to the aforementioned first, second, third, and fourth connection terminals, respectively, in the pocket 510 described above) 513 and 514 may be formed.

That is, various information collected by the above-described displacement measuring unit 300 may be collected by contacting by wire.

In addition, while the displacement measurement unit 300 is accommodated in the charging unit 500, the battery unit 340 may be charged automatically.

Meanwhile, a connecting sensing unit 355 may be disposed on one side of the above-described displacement measuring unit 300, and the connecting sensing unit 355 may include the displacement measuring unit 300 stored in the above-described pocket 510. Detecting the battery may cause the battery charging and data transmission operation to be started.

In addition, as illustrated in FIG. 9, the multi-charging unit 600 described above allows the pockets 510 to be formed in multiple numbers so that the plurality of displacement measuring units 300 may store and charge the same.

On the other hand, the multi-charging unit 600 described above can be used when the displacement measuring unit 300 is provided with a plurality, for example, the number of large bolts 36 is several, several large bolts 36 ) Can be used when the hydraulic fastening at the same time by the hydraulic fastening device.

In this case, each of the plurality of pockets 510 may be given an identification code, and the information may be collected and charged in each of the displacement measuring units 300 paired with each identification code.

On the other hand, the plurality of information collected in the plurality of pockets 510 described above is sent to the terminal unit 400 to determine the progress of the fastening operation for each large bolt 36 in the terminal unit 400.

Hereinafter, the operation of the large bolt hydraulic tightening device according to an embodiment of the present invention configured as described above.

One worker installs the actuator 40 at the end of the large bolt 36, sets the hydraulic pressure of the desired hydraulic oil in the hydraulic switch 170, and operates the hydraulic pump 110 remotely.

Thereafter, the control valve unit 130 is controlled electronically by a remote control to provide the hydraulic pressure of the hydraulic oil to the actuator 40 to apply a tensile force to the large bolt 36.

At this time, when the pressure difference between the outlet side of the hydraulic pump 110 side and the actuator 40 side occurs, the hydraulic pump 110 is precisely controlled electronically.

That is, lowering the rotational speed of the drive motor 120 will lower the discharge pressure, and increasing the rotational speed of the drive motor 120 will increase the discharge pressure, wherein the rotational speed of the drive motor 120 is controlled in the control unit 220 The operation is processed to control the inverter 230, and the inverter 230 precisely increases or decreases the rotational speed of the above-described driving motor 120, compared to the on / off control of the driving motor 120 as in the related art. Smooth control is possible, which prevents hunting and maintains durability of the machine drive unit.

It is possible to improve the error caused by measuring the pressure of the hydraulic fluid in the conventional analog method, thereby providing high quality when hydraulically tightening a large bolt.

In addition, when the hydraulic tightening of the large bolt 36 is finished, the hydraulic oil provided to the actuator 40 is drained. At this time, the vacuum pump 140 is driven to shorten the working time of the large bolt hydraulic tightening to assist the draining of the hydraulic oil. You can do it.

On the other hand, the displacement measuring unit 300 is a charging battery is applied to the battery unit 340 and is automatically charged when storing / storing the displacement measuring unit 300, the displacement measuring unit 300 is always used when using the hydraulic fastening device It is to maintain the best condition.

On the other hand, by managing the fastening hydraulic data and the data collected in each displacement measuring unit 300 in duplicate can prevent the accident of missing the fastening by the operator.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

The large bolt hydraulic automatic fastening device according to the present invention can be used to improve the tightening force of the component by applying a tensile force to the large bolt when fastening and fixing the component by the large bolt.

10: ship engine 20: connecting rod
30: crankshaft 32: fixed part
34: fastener 36: large bolt
38: Nut 40: Actuator
42: cylinder housing 43: supporter ring
44: piston 45: female thread
46: chamber 48: pressure port
100: oil tank 110: hydraulic pump
120: electric motor 122a: high pressure output unit
122b: low pressure output unit 124a: high pressure control unit
124b: low pressure control unit 130: control valve unit
132: manual control valve unit 134: check valve
140: vacuum pump 150: distribution block
160: digital pressure gauge 162: analog pressure gauge
170: pressure switch 180: distribution unit
210: power unit 220: control unit
230: inverter 300: displacement measuring unit
310: body 320: probe tip
322: dog 330: sensing unit
340: battery unit 350: terminal panel
351, 352, 353, 354: first, second, third and fourth connection terminals
355: connecting sensing unit 360: magnetic unit
370: communication unit 400: terminal unit
500: charging unit 510: pocket
511, 512, 513, 514: fifth, sixth, seventh, and eighth connection terminals
600: multi charging unit

Claims (9)

A hydraulic pump 110 for generating hydraulic pressure to discharge hydraulic oil;
An electric motor 120 for driving the hydraulic pump 110;
A control valve unit 130 to control the discharge of the hydraulic oil and the progress of draining the hydraulic oil discharged from the hydraulic pump 110 by electronic control;
A digital pressure gauge unit 160 for measuring the hydraulic pressure of the hydraulic oil discharged from the control valve unit 130 and outputting it as a digital signal;
An actuator (40) provided with hydraulic oil discharged from the control valve unit (130) to exert a tensile force on the large bolt (36);
A displacement measuring unit (300) installed in the actuator (40) for detecting a change in length of the large bolt (36) and transmitting the detected value wirelessly; And
A control unit 220 for receiving the digital signal output from the digital pressure gauge unit 160 and the detection value output from the displacement measuring unit 300 to control driving strength and weakness of the electric motor 120;
Large bolt hydraulic automatic fastening device comprising a.
The method of claim 1,
A vacuum pump (140) installed at one side of the control valve unit (130) to generate a vacuum to assist the drainage of the hydraulic oil in the actuator (40);
Large bolt hydraulic automatic fastening device comprising more.
The method of claim 1,
An inverter 230 installed at one side of the control unit 220 to generate a signal for controlling driving strength and weakness of the electric motor 120;
Large bolt hydraulic automatic fastening device comprising more.
The method of claim 1,
A terminal unit 400 for wirelessly communicating with the control unit 220 to remotely control the control unit 220;
Large bolt hydraulic automatic fastening device comprising more.
The method of claim 4, wherein
The terminal unit 400,
The driving situation of the hydraulic pump 110, the amount of length displacement of the large bolt 36 and the pressure value of the hydraulic oil provided to the actuator 40 are displayed so that the large bolt hydraulic fastening process can be grasped. Large bolt hydraulic automatic fastening device.
The method of claim 1,
The displacement measuring unit 300,
A housing 310 installed on one side of the actuator 40;
A probe tip 320 provided inside the housing 310 to detect a change in length of the large bolt 36;
A sensing unit (330) provided inside the housing (310) for detecting displacement of the probe tip (320);
A communication unit 370 provided inside the housing 310 to wirelessly transmit the detected detection value detected by the sensing unit 330;
A battery unit 340 provided inside the housing 310 to provide power to the sensing unit 330 and the communication unit 370; And
A terminal panel 350 provided at one side of the housing 310 to charge the battery unit 340 by connecting the battery unit 340 to an external power source;
Large bolt hydraulic automatic fastening device comprising a.
The method according to claim 6,
A temperature sensor 332 provided inside the housing 310 to detect an ambient temperature of the actuator;
The terminal panel 350 is
A first connection terminal 351 for grounding;
A second connection terminal 352 for outputting a temperature detection value detected by the temperature sensor 332;
A third connection terminal 353 for turning on the power of the displacement measuring unit 300; And
A fourth connection terminal 353 for supplying power to the battery unit 340;
Large bolt hydraulic automatic fastening device comprising a.
The method according to any one of claims 1, 6 and 7,
A pocket 510 formed to receive the displacement measuring unit 300;
Fifth, sixth, seventh, and eighth connection terminals 511, 512, 513, and 514 to be connected to the first, second, third, and fourth connection terminals, respectively, in the pocket 510. The charging unit 500 is formed; And
A connecting sensing unit (355) disposed in the displacement measuring unit (300) to detect that the displacement measuring unit (300) is stored in the pocket (510) to start battery charging and data transmission operation;
Large bolt hydraulic automatic fastening device comprising more.
The method according to any one of claims 1, 6 and 7,
A plurality of pockets 510 provided in plural so that the displacement measuring unit 300 is provided in plural so that the plurality of displacement measuring units 300 are accommodated;
Fifth, sixth, seventh, and eighth connection terminals 511, 512, 513 to be connected to the first, second, third, and fourth connection terminals, respectively, in the plurality of pockets 510. 514; formed multi-charging unit 600;
A connecting sensing unit (355) disposed in the displacement measuring unit (300) to detect that the displacement measuring unit (300) is stored in the pocket (510) to start battery charging and data transmission operation;
Large bolt hydraulic automatic fastening device comprising more.

Images