JP7071960B2 - Seal construction management method, seal construction management device, seal construction management program and seal construction management system - Google Patents

Description

The present invention relates to a sealing construction management technique used for flange tightening for connecting pipes, valves, pumps and the like.

Flange joints are used for connecting pipes and connecting pumps to pipes. A gasket is sandwiched between the flanges of this flange joint, and tightening is performed with bolts and nuts arranged at a plurality of locations on the flange. A tightening tool such as a torque wrench is used for this tightening.

Regarding this tightening tool, in a tool that uses an electric motor as a rotary drive source, a current pulse is intermittently applied to the motor, the current value is controlled according to the detected torque, and the current pulse is sent when the target torque is reached. It is known to stop (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-1676

By the way, when tightening the flange joint, tightening torque is applied from the tightening tool to the bolts and nuts arranged at a plurality of places. If a tool capable of torque control is used for this tightening, a desired tightening torque may be applied to the bolts and nuts, and uniform and uniform tightening becomes possible.

However, there are a wide variety of flanges and gaskets, and considerable experience is required to select a suitable gasket. Moreover, the tightening procedure of a plurality of bolts arranged on the flange is not uniform, and even if a tightening tool capable of torque management is used, the construction management is not reduced by itself. Still, it is desirable to use a skilled worker to improve the reliability of construction, training and experience for mastery are required, the burden on the worker is excessive, and management of seal construction is extremely important.

In such seal construction, in order to avoid one-sided tightening and crushing, the selection and combination of tightening methods such as diagonal tightening and circumferential tightening, as well as the skill, ability and experience of the builder affect the construction accuracy. Will vary.

Therefore, in view of these problems, an object of the present invention is to automate the setting of the output torque according to the number of cycles of the tightening points and the tightening points, facilitate the construction management of the seal, and improve the construction accuracy.
Further, another object of the present invention is to use a tightening tool capable of automatically setting the output torque in view of such a problem, to facilitate the construction management of the seal and to improve the construction accuracy.

In order to achieve the above object, according to one aspect of the seal construction management method of the present invention, a plurality of tightening points are set on the flange sandwiching the gasket, and bolts and nuts are provided at each tightening point to tighten the seal construction management method. The step of calculating or selecting the torque value to be applied to the bolt or the nut according to the number of rounds in which the computer makes one round of tightening to the plurality of tightening points, and the torque value. Each time the bolts or nuts of the plurality of tightening points are tightened by the process of setting to the tightening tool and the torque value set to the tightening tool, and the tightening to the plurality of tightening points is completed, the tightening tool is used. By setting the torque value according to the number of rounds, each step including the step of changing the output torque of the tightening tool stepwise or continuously is executed.

The seal construction management method may further include a step of detecting the number of cycles of the tightening tool or the tightening point.

The seal construction management method may further include a step of setting the number of cycles of the tightening point or the tightening point in the tightening tool.
In the seal construction management method, the step of detecting the axial force of the bolt, the change information of the detected axial force, and the information for identifying the bolt are used to detect the number of cycles of the tightening tool or the tightening point. It may include the steps to be performed.

In order to achieve the above object, according to one aspect of the seal construction management device of the present invention, a plurality of tightening points are set on the flange sandwiching the gasket, and each tightening point is provided with bolts and nuts for tightening. Therefore, the torque value to be applied to the bolt or the nut is calculated or selected according to the number of rounds of tightening to the plurality of tightening points, and the torque value is set in the tightening tool. Each time the bolts or nuts of the plurality of tightening points are tightened with the torque value set in the tightening tool and the tightening to the plurality of tightening points makes one round, the tightening tool is adjusted to the number of rounds . A control means for changing the output torque of the tightening tool stepwisely or continuously by setting the torque value is provided.

The seal construction management device may include a detecting means for detecting the number of cycles of the tightening point of the tightening tool or the tightening point.

In the seal construction management device, the tightening tool may be provided with a setting means for setting the number of cycles of the tightening point or the tightening point.

In the seal construction management device, the control means may be installed in the tightening tool or installed separately from the tightening tool and connected by wire or wirelessly.
In the seal construction management device, the detection means includes an axial force sensor that detects the axial force of the bolt, and uses the change information of the axial force detected by the axial force sensor and the information for identifying the bolt. The number of rounds or the tightening point of the tightening tool may be detected.

In order to achieve the above object, according to one aspect of the seal construction management program of the present invention , bolts are bolted according to the number of rounds of tightening to a plurality of tightening points set on the flange sandwiching the gasket. Alternatively, the function of calculating or selecting the torque value to be applied to the nut, the function of setting the torque value in the tightening tool, and the bolt or the nut of the plurality of tightening points with the torque value set in the tightening tool. The output torque of the tightening tool is changed stepwise or continuously by setting the torque value according to the number of rounds to the tightening tool each time the tightening is performed and the tightening to the plurality of tightening points is completed. The function to be performed is realized by the computer.

In order to achieve the above object, according to one aspect of the seal construction management system of the present invention, a plurality of tightening points are set on the flange sandwiching the gasket, and each tightening point is provided with bolts and nuts for tightening. A tightening tool capable of gradually or continuously controlling the output torque applied to the bolt or nut is connected to the tightening tool by wire or wirelessly, and tightening to a plurality of the tightening points is completed. The torque value to be applied to the bolt or the nut is calculated or selected according to the number of rounds, which is the number of times, the torque value is set in the tightening tool, and the torque value set in the tightening tool is used for a plurality of the tightening points. Each time the bolt or nut is tightened and tightening to a plurality of tightening points makes one round, the tightening tool is set with the torque value according to the number of rounds, thereby stepwise or continuously. It is equipped with a controller that changes the output torque of the tightening tool.

According to the present invention, any of the following effects can be obtained.
(1) The axial force of each bolt is set to the target axis by changing the output torque applied from the tightening tool to the bolt or nut at the tightening point of the flange stepwise or continuously according to the number of cycles of the tightening point or the tightening point. You can reach the force.
(2) The output torque applied from the tightening tool to the bolt or nut at the tightening point of the flange can be automatically changed to the optimum value step by step or continuously according to the number of cycles of the tightening point or the tightening point. It is possible to realize highly accurate sealing construction without being affected by the skill and intuition of.
(3) Since it is possible to set the number of cycles for the axial force of each bolt at multiple tightening points to reach the target axial force, it is possible to standardize and speed up the sealing work.
(4) It is possible to reduce the error of the builder and improve the reliability of the seal construction.

And other objects, features and advantages of the present invention will be further clarified by reference to the accompanying drawings and each embodiment.

It is a figure which shows the seal construction management apparatus which concerns on 1st Embodiment. It is a figure which shows the patrol form of the tightening part. It is a flowchart which shows the process order of seal construction management. A is a diagram showing the seal construction management system according to the second embodiment, and B is a diagram showing the function of the control unit. It is a figure which shows the processing sequence of the seal construction management. It is a figure which shows the seal construction management apparatus which concerns on 3rd Embodiment. It is a figure which shows the seal construction management system which concerns on Example. A is a diagram showing an example of a tightening tool, and B is a diagram showing an example of an axial force sensor. A is a diagram showing the hardware of the controller, and B is a diagram showing the storage unit. It is a figure which shows the server. It is a figure which shows the tightening condition table. It is a figure which shows the torque value table. It is a figure which shows the modification of the torque value table. It is a figure which shows the processing sequence of a seal construction management system. It is a figure which shows the transition of the detection axial force using the tightening management.

[First Embodiment]
FIG. 1 shows a seal construction management device according to the first embodiment. The configuration shown in FIG. 1 is an example, and the present invention is not limited to such a configuration.

This seal construction management device 2-1 is used for tightening and managing a plurality of bolts 6 and nuts 8 of the seal construction unit 4 that connects pipes, valves, pumps, and the like. The seal construction portion 4 is an example of a tightening target, in which a gasket 12 is sandwiched between flanges 10-1 and 10-2, and bolts 6 and nuts 8 are arranged at a plurality of tightening points. In this example, the flanges 10-1 and 10-2 are tightened at eight locations on the peripheral edge, that is, at intervals of an angle θ = 45 °, and eight bolts 6 and nuts 8 are arranged.

The seal construction management device 2-1 is provided with a tightening tool 14 and a control unit 16-1 thereof. The tightening tool 14 may be any tool that is a means for generating the output torque T applied to the bolt 6 or the nut 8 and can manage the adjustment / change of the output torque. That is, a general power tool such as a nut runner can be used for the tightening tool 14.

In this tightening tool 14, the operator grips the grip 18 to maintain the apparatus main body 20, fits the socket 22 to the nut 8 at the tightening point, and then presses the trigger switch 24 to tighten the output torque T. It can be applied to the nut 8 at the location.

The control unit 16-1 is an example of the control means of the tightening tool 14, and is composed of, for example, a computer. The function of this control unit 16-1 is
a. Function to calculate or select the torque value τ to be applied to the bolt 6 or nut 8 according to the number of cycles N of the tightening point or the tightening point P b. Function to set the torque value τ in the tightening tool 14 c. It includes a function of changing the output torque T of the tightening tool 14 stepwise or continuously according to the number of cycles N or the tightening point P.

In these functions a, b and c, the tightening point is a place where a tightening force is applied between the flanges 10-1 and 10-2, and in the above-mentioned example, it is a place where the bolt 6 or the nut 8 is arranged. The number of cycles N of the tightening point P is the number of units that orbit the positions P1, P2 ... Pn of the bolt 6 and the nut 8.

The torque value τ is a torque set to reach the target axial force Fe at the tightening point, and is a value to be applied to the bolt 6 or the nut 8 according to the number of cycles N at the tightening point or the tightening point P. This torque value τ is calculated as a level value required to reach the target axial force Fe according to the tightening conditions including the gasket 12. Instead of calculating the torque value τ, it may be selected from the database of the torque value τ calculated in advance according to the number of cycles N of the tightening points or the tightening points P.

In b, the torque value τ is the control information output to the tightening tool 14 by the control unit 16-1, and the torque value τ is set to the tightening tool 14 based on this control information.

In c, the output torque T of the tightening tool 14 is changed stepwise or continuously by the control unit 16-1 according to the number of cycles N or the tightening point P. As a result, the axial force of the bolt 6 or the nut 8 at each tightening point reaches the target axial force Fe.

For the patrol of the tightening points, the positions P1, P2 ... Pn may be patrolled in order as shown by the arrow a of A in FIG. 2, or the positions may be patrolled as shown by the arrow b of B in FIG. P1, P2 ... Pn may be circulated by changing the tightening points in the radial direction of the flanges 10-1 and 10-2. That is, the tightening points may be changed consecutively in the positions P1, P2 ... Pn in numerical order, or the tightening points may be regularly skipped by a predetermined number and patrolled. Therefore, the number of rounds N is not limited to the count value of the rounds in which the positions P1, P2 ... Pn are consecutive in order, and may be the count value counted in units of the rounds skipping the predetermined position.

FIG. 3 shows a process of sealing construction management using the control unit 16-1.
This construction management is an example of a seal construction management method, in which a plurality of tightening points are set on the flanges 10-1 and 10-2 sandwiching the gasket 12, and bolts 6 and nuts 8 are provided at each tightening points for tightening (a process of tightening. S101, S102, S103, S104, S105, S106) are included.

In this seal construction management, the torque value τ to be applied to the bolt 6 or the nut 8 is calculated or selected according to the number of cycles N of the tightening points or the tightening points P during the seal construction (before or during the construction) (S101). ).
The calculated or selected torque value τ is set in the tightening tool 14 by the control unit 16-1 (S102).

In the tightening work of the tightening point, it is determined whether the number of cycles N of the tightening point or the change of the tightening point P is changed (S103). If there is a change in the number of cycles N or the tightening point P of the tightening point (YES in S103), the output torque T of the tightening tool 14 is changed stepwise or continuously according to the number of cycle N of the tightening point or the tightening point P. (S104). If there is no change in the number of cycles N of the tightening points or the tightening points P (NO in S103), the current output torque T is maintained (S105).

Then, it is determined whether the axial force F at each tightening point has reached the target axial force Fe (S106). If the axial force F at each tightening point does not reach the target axial force Fe (NO in S106), each step of S103 to S106 is repeated, and the torque value corresponding to the change in the number of cycles N at the tightening point or the tightening point P. The setting of τ is repeated, and the output torque T is changed.

When the axial force F at each tightening point reaches the target axial force Fe (YES in S106), the sealing construction is completed.

The axial force F at each tightening point may be detected from each bolt 6 by the axial force sensor, or may be calculated by using the detection value of the torque sensor on the tightening tool 14 side.

<Effect of the first embodiment>
(1) Highly accurate and reliable seal construction can be realized without relying on the skill and intuition of the builder.
(2) The torque value τ can be calculated, set, and the output torque T can be detected consistently, and highly reliable sealing construction can be expedited.
(3) It is possible to reduce the mistakes of the builder's seal construction and improve the builder's safety.

[Second Embodiment]
FIG. 4A shows a seal construction management system according to the second embodiment. In A of FIG. 4, the same parts as A of FIG. 1 are designated by the same reference numerals. The configuration shown in A of FIG. 4 is an example, and the present invention is not limited to such a configuration.

The seal construction management system 2-2 is provided with a tightening tool 14, a control unit 16-2, and axial force sensors 26-1, 26-2 ... 26-n. Since the tightening tool 14 has the same configuration as described above, the description thereof will be omitted.

The control unit 16-2 is an example of the control means of the tightening tool 14, and is composed of, for example, a computer. The control unit 16-2 controls the tightening tool 14 in the same manner as the control unit 16-1 (A in FIG. 1), but the axial force sensors 26-1, 26-2 ... 26-n control the tightening tool 14. It differs from the control unit 16-1 in that the detection axial force is used. The axial force sensors 26-1, 26-2 ... 26-n are examples of axial force detecting means for detecting the axial force of each bolt 6 in the seal construction portion 4. In this example, the axial force sensors 26-1, 26-2 ... 26-8 are individually provided on the eight bolts 6, and each detected axial force is taken into the control unit 16-2. The control unit 16-2 is used for comparison information on whether or not each detected axial force F has reached the target axial force Fe, specific information on the tightening point, patrol information on the tightening point, and the like.

As shown in B of FIG. 4, the control unit 16-2 realizes the first, second and third functions 28, 30 and 32. The function 28 calculates or selects the torque value τ to be applied to the bolt 6 or the nut 8 according to the number of cycles N of the tightening points or the tightening points P. In the function 30, the torque value τ is set in the tightening tool 14. Then, in the function 32, the output torque T of the tightening tool 14 is changed or maintained stepwise or continuously according to the number of cycles N or the tightening point P.

FIG. 5 shows a processing sequence of seal construction management of the seal construction management system 2-2.

At the time of sealing, the tightening tool 14 is initially set (S201), and the control unit 16-2 is initially set (S202). The axial force sensors 26-1, 26-2 ... 26-n detect the axial force of each bolt 6 (S203), and the control unit 16-2 captures each detected axial force (S204). The control unit 16-2 determines the number of cycles N of the tightening point P or the tightening point P (S205). In this case, each tightening point P can be specified by the numbers of the eight bolts 6 at the eight tightening points P1 to P8 and the change in the detection axial force, and the cyclic number N is, for example, the tightening of the eight bolts 6 as a unit. Then, the number of cycles N is specified by the number of times the tightening of the same bolt 6 makes one cycle.

The control unit 16-2 calculates the torque value τ applied to the bolt 6 or the nut 8 according to the number of cycles N of the tightening point P or the tightening point P (S206). For this calculation, refer to the tightening conditions of the selected gasket 12, the torque value τ0 for the number of rounds N = 0, the torque value τ1 for the number of rounds N = 1, and the torque value τ1 for the number of rounds N = 2. The torque value τ2 ... Is calculated. In this case, the torque value τ corresponding to the number of cycle N may be selected from the torque values τ0, τ1, τ2 ... Calculated in advance.

This torque value τ is provided to the tightening tool 14 from the control unit 16-2 and set (S207). The tightening tool 14 produces an output torque T according to this torque value τ. As a result, the output torque T is changed or maintained stepwise or continuously according to the number of tightening cycles N or the tightening point P (S208).

Then, the builder applies the output torque T to the bolts 6 or nuts 8 of the tightening points P1 to P8 by the tightening tool 14, and tightens them (S209). Axial force sensors 26-1, 26-2 ... 26-8 detect the axial force of the bolt 6 at each tightening point P1 to P8 (S210), and the detected axial force is taken into the control unit 16-2 (S). S211).

The control unit 16-2 determines whether or not each detected axial force has reached the target axial force (S212). If each detected axial force F does not reach the target axial force Fe (NO in S212), the process returns to S205 and the processes of S205 to S212 are repeated.

When each detected axial force F reaches the target axial force Fe (YES in S212), the tightening is completed (S213), the tightening tool 14 is notified, and the tightening is completed. The completion of this tightening may be notified using a display device.

<Effect of the second embodiment>
(1) Calculation of torque value τ according to the number of rounds N of tightening points and tightening point P, setting of torque value τ corresponding to the number of rounds of tightening points and tightening points, number of rounds of tightening points of output torque T and tightening The axial force F of the bolt 6 can be quickly reached to the target axial force Fe by changing continuously or stepwise depending on the location.
(2) Since the output torque T applied to the bolt 6 from the tightening tool 14 can be captured and monitored by the detection axial force F from each bolt 6, reliable sealing construction can be realized.
(3) An appropriate axial force can be obtained as the target axial force without causing insufficient axial force or excessive axial force.
(4) The patrol of the tightening points can be tightened not only in the order of bolt numbers but also in various forms skipping the bolt numbers, and proper sealing can be quickly performed regardless of which tightening patrol is used. can.

[Third Embodiment]
FIG. 6 shows a seal construction management device according to a third embodiment. In FIG. 6, the same parts as A in FIG. 1 are designated by the same reference numerals. The configuration shown in FIG. 6 is an example, and the present invention is not limited to such a configuration.

The seal construction management device 2-3 is provided with a tightening tool 14, a control unit 16-3, and a tightening condition setting unit 34. Since the tightening tool 14 has the same configuration as the seal construction management device 2-1, the description thereof will be omitted.

The tightening condition setting unit 34 sets the cyclic number N of the tightening point P or the tightening point P, which is an example of the tightening condition. The control unit 16-3 calculates or selects the torque value τ and controls the output torque T of the tightening tool 14 by the cyclic number N of the tightening point P or the tightening point P set by the tightening condition setting unit 34. In this way, the functions of the control unit 16-1 of the first embodiment may be realized by the control unit 16-3 and the tightening condition setting unit 34.

The same effect as that of the above embodiment can be obtained even in the configuration of setting the cyclic number N of the tightening point P or the tightening point P by using the tightening condition setting unit 34 as in the third embodiment. ..

FIG. 7 shows a seal construction management system according to an embodiment. The configuration shown in FIG. 7 is an example, and the present invention is not limited to such a configuration.
The seal construction management system 2-4 is provided with a tightening tool 14, a controller 16-4, and a server computer (hereinafter simply referred to as “server”) 16-5. Since the tightening tool 14 has the same configuration as described above, the description thereof will be omitted.

The controller 16-4 is connected to the tightening tool 14 by wire or wirelessly, and in this example, is connected by a cable 36. The controller 16-4 is configured, for example, a computer alone or in conjunction with the server 16-5. Instead of the cable 36 connection, a Wi-Fi connection may be used as an example of the wireless connection. The front panel unit 38 of the controller 16-4 is provided with a plurality of input operation units 40 and a display unit 42.

This controller 16-4 is processed by computer.
a. Calculate or select the torque value τ to be applied to the bolt 6 or nut 8 according to the number of cycles N of the tightening point or the tightening point P. b. Setting the torque value τ on the tightening tool 14 c. Change the output torque T of the tightening tool 14 stepwise or continuously according to the number of cycles N or the tightening point P d. Acquisition of tightening management information from server 16-5 e. Acquisition of flange information for flanges 10-1 and 10-2 f. Acquisition of gasket information for gasket 12 g. Collation of gasket information h. Selection of tightening conditions from tightening condition information and input to the tightening tool 14 i. Presentation of tightening result information j. Realize processing and functions such as presentation of evaluation information of tightening results.

The controller 16-4 is wired or wirelessly linked to the server 16-5 as a communication medium 44 shown by a broken line. The server 16-5 is a computer that supports the information processing of the controller 16-4 or manages the information processing, and for example, a personal computer may be used. The server 16-5 is provided with a processing unit 46, an input operation unit 48, and a monitor 50 as an example.

<Tightening tool 14>
FIG. 8A shows an example of the hardware of the tightening tool 14. The tightening tool 14 includes a control unit 52, a motor 54, and a torque sensor 56, as in the case of a general power tool.

The control unit 52 is provided with a computer and a motor drive unit, and control information such as a torque value τ is provided from the controller 16-4. The motor 54 is driven according to tightening information such as a torque value τ, and a drive current is supplied to the motor 54 when the trigger switch 24 is conducting.

The rotation of the motor 54 is transmitted to the socket 22 attached to the rotating shaft 58, and the output torque T is applied to the nut 8 fitted in the socket 22. The rotating shaft 58 may be provided with a gear mechanism, and the rotational force of the motor 54 may be transmitted to the socket 22 at a desired gear ratio.

The torque sensor 56 detects the output torque T from the motor 54 or the rotating shaft 58, and the detected torque is taken into the control unit 52. The torque sensor 56 may detect the tightening torque of the bolt 6 and the nut 8 and may be provided outside the tightening tool 14.

FIG. 8B shows an example of the bolt 6 provided with the axial force sensor 26. If each bolt 6 is provided with an axial force sensor 26 and the axial force F applied to each bolt 6 is detected, the value of the output torque T of the tightening tool 14 and its increase or decrease can be measured. As the axial force sensor 26, for example, a strain sensor may be used.

<Controller 16-4>
A in FIG. 9 shows an example of the controller 16-4. The controller 16-4 is a control means for the tightening tool 14, and is an example of a seal construction management device for seal tightening.

The controller 16-4 is composed of, for example, a computer, and includes a processor 60, a storage unit 62, an input / output unit (I / O) 64, an input operation unit 40, a communication unit 68, and a display unit 42.

The processor 60 is an example of processing means, and performs information processing such as an OS and a seal construction management program in the storage unit 62. For this information processing, acquisition of tightening condition information from the server 16-5, input of tightening conditions including a torque value τ to the tightening tool 14, acquisition of output torque T from the tightening tool 14, monitoring and evaluation of the tightening state, and evaluation. Controls such as display of results and output of tightening result information are included.

The storage unit 62 is used for storing the OS, the seal construction management program, the tightening condition information, the detection information, and the like, and is provided with a ROM and a RAM. A storage element capable of holding the stored contents may be used for the storage unit 62.

The I / O 64 is controlled by the processor 60 and used for input / output of control information. For example, a barcode reader 72 or a detachable external memory 74 is connected to the I / O 64 as an external device. The barcode reader 72 is an example of an information acquisition unit. The external memory 74 is a memory for extracting log information, and for example, a USB (Universal Serial Bus) memory may be used.

The input operation unit 40 includes a key switch, a touch sensor, and the like, and is used for input information input triggers, output information fetch triggers, mode switching, and the like.

The communication unit 68 is controlled by the processor 60 and is used for a wireless connection with an external device such as a server 16-5 or an Internet connection.

The display unit 42 is controlled by the processor 60 and is an example of means for presenting input information and output information. The display unit 42 is provided with, for example, a green lamp 76-1, a red lamp 76-2, and the like as means for displaying status information. When it is normal, the green lamp 76-1 is turned on, and when it is abnormal, the red lamp 76-2 is turned on.

FIG. 9B shows an example of the stored contents of the storage unit 62. The storage unit 62 is provided with a temporary storage area 78-1 and a storage area 78-2. Flange information 80, gasket information 82, worker information 84, tightening result information 86 acquired from the tightening tool 14, and the like are temporarily stored in the temporary storage area 78-1.

A database such as a tightening condition table 88 and torque value tables 90-1 and 90-2 is constructed in the storage area 78-2. The tightening condition information related to the flanges 10-1 and 10-2 is recorded in the tightening condition table 88. Torque value information such as the number of cycles N and the torque value τ having different cyclic forms is stored in the torque value tables 90-1 and 90-2.

<Server 16-5>
FIG. 10 shows an example of the server 16-5. The server 16-5 is a support device for the controller 16-4 and is an example of means for presenting log information.

The server 16-5 includes a processor 92, a storage unit 94, an input / output unit (I / O) 96, a communication unit 98, and an input operation unit 48 and a monitor 50 described above in the processing unit 46.

The processor 92 performs information processing such as an OS and a seal construction management program in the storage unit 94. This information processing includes processing such as providing tightening condition information to the controller 16-4, acquiring information representing the tightening result from the controller 16-4, and presenting the tightening result information.

The storage unit 94 is used for storing the OS, the seal construction management program, the tightening condition information, the log information, and the like, and is provided with a ROM and a RAM. A storage device such as a hard disk or a semiconductor memory capable of holding the stored contents may be used for the storage unit 94.

The I / O 96 is controlled by the processor 92 and used for input / output of control information. The communication unit 98 is used, for example, for wirelessly connecting a controller 16-4 or the like. For example, an external memory 100 is connected to this I / O 96 as an external device.
The communication unit 98 is controlled by the processor 92 and is used for wireless connection with external devices such as the tightening tool 14 and the controller 16-4, and for Internet connection.
The input operation unit 48 is used for inputting input information, taking out output information, switching modes, and the like.
The monitor 50 is an example of an information presentation unit and a display unit, and is used for displaying, for example, a tightening condition table 88 and torque value tables 90-1 and 90-2. The screen display unit of the monitor 50 may be provided with a touch panel 102, and instead of the input operation unit 48, input information corresponding to the display information may be performed.

<Tightening condition table 88>
FIG. 11 shows an example of the tightening condition table 88. The tightening condition table 88 stores the tightening condition information and is provided from the server 16-5 to the controller 16-4. As an example of the tightening condition information, the tightening condition table 88 includes application location information, flange information 80, gasket information 82, tightening result information 86, and the like. The application location information is information such as the implementation line. The flange information 80 is individual information used for identifying the flanges 10-1 and 10-2. The gasket information 82 is individual information used for identifying the gasket 12. The tightening condition includes link information with the torque value tables 90-1 and 90-2 in which the torque value τ, the number of cycles N, and the like are stored as the torque value information.

As shown in FIG. 11, the tightening condition table 88 includes a line information unit 104, a flange information unit 106, a gasket information unit 108, a bolt information unit 110, and a tightening condition information unit 112.

The line information unit 104 stores, for example, identification information of a tightening point such as a piping line such as LineA, LineB, and the like. The flange information unit 106 stores a flange number for identifying the flanges 10-1 and 10-2, a flange dimension, and the like. The gasket information unit 108 stores a gasket part number, a gasket dimension, and the like that identify the gasket 12. The number of bolts and the like are stored in the bolt information unit 110. The tightening condition information unit 112 stores a tightening condition number for identifying the tightening condition.

Since the tightening condition table 88 is provided as the tightening condition information from the server 16-5, the controller 16-4 can grasp the necessary tightening condition information regarding the server 16-5 and the tightening, and the tightening condition information is used independently. can.

<Torque value table 90-1, 90-2>
The torque value table 90-1 shown in FIG. 12 corresponds to the patrol form shown in A of FIG. 2 described above. In this torque value table 90-1, the torque values τ (= τ01, τ02) of the number of cycles N (= 0, 2 ... n) of the tightening points P and the tightening points P (= P1, P2 ... Pn) are shown. ... τnn) is stored. These torque values τ are calculated and stored according to the number of cycles N (= 0, 2 ... n) according to the flanges 10-1, 10-2 and the gasket 12 to be tightened. Each value may be calculated at the time of sealing construction, or a pre-calculated value may be stored and selected.

The torque value table 90-2 shown in FIG. 13 corresponds to the sealing construction in the case where the patrol form shown in B of FIG. 2 described above is placed in front. In this torque value table 90-2, when the number of cycles N of the tightening points P is less than 1 (N <1), the tightening points P (= P1, P2 ... Pn) specified by the angle θ of the tightening points P ) Torque value τ (= τ01, τ02 ... τnn) is stored. As the torque value after one round of tightening (N = 1), the torque value τ similar to the torque value table 90-1 shown in FIG. 12 is calculated according to the number of rounds N (= 2 ... n). Stored. Each value may be calculated at the time of sealing construction, or a value calculated in advance may be stored and selected, as in the case of the torque value table 90-1.

<Processing sequence of seal construction management>
FIG. 14 shows a processing sequence of seal construction management by the seal construction management system 2-4.
At the time of sealing construction, the initial setting of the tightening tool 14 is performed (S301), and the initial setting of the controller 16-4 is performed (S302). After this initial setting, the controller 16-4 and the server 16-5 are linked, and the tightening condition information provided by the server 16-5 is taken into the controller 16-4 (S303). The acquisition of the tightening condition information is realized by acquiring the tightening condition table 88 and the torque value tables 90-1 and 90-2.

In the controller 16-4 that has acquired the tightening condition information, the tightening conditions corresponding to the previously selected flanges 10-1, 10-2 and the gasket 12 are selected (S304). If the torque value τ has been calculated in advance, the selection of the tightening condition may include a process of selecting the value. In this way, after the tightening preparation process, the controller 16-4 cooperates with each axial force sensor 26-1, 26-2 ... 26-n, and each axial force sensor 26-1, 26-2 ... 26-n detects the axial force of each bolt 6 (S305), and the controller 16-4 takes in each detected axial force (S306).

The controller 16-4 uses each detected axial force to determine the number of cycles N of the tightening point P or the tightening point P (S307). That is, for example, from the tightening points P = 8 points, it is possible to specify which of the tightening points P1 to P8 is from the numbers of the eight bolts 6 and the change in the axial force, and the cyclic number N is selected from the tightening points P1 to P8. As described above, it is possible to specify N = 0 to n as the number of rounds N, where the number of rounds is 1 with the tightening of the plurality of bolts 6 as a unit.

The controller 16-4 calculates the torque value τ applied to the bolt 6 or the nut 8 according to the number of cycles N of the tightening point P or the tightening point P (S308). For this calculation, the tightening conditions of the selected gasket 12 are referred to, and the torque values τ01, τ02 ... For the number of cycles N = 0, the torque values τ11, τ12 ... The torque values τ21, τ22 ... Are calculated for the number of cycles N = 2. In this case, the torque value τ corresponding to the number of cycle N may be selected from the torque values τ0, τ01, τ02 ... τnn calculated in advance.

This torque value τ is provided to and set by the tightening tool 14 from the controller 16-4 (S309). The tightening tool 14 produces an output torque T according to this torque value τ. As a result, the output torque T is changed or maintained stepwise or continuously according to the number of cycles N of the tightening point P or the tightening point P (S310).

Then, the installer applies an output torque T to the bolt 6 or the nut 8 at the tightening point by the tightening tool 14 to tighten the bolt 6 or the nut 8 (S311). Each axial force sensor 26-1, 26-2 ... 26-n detects the axial force of the bolt 6 at each tightening point P (S312), and each detected axial force F is taken into the controller 16-4 ( S313).

The controller 16-4 determines whether or not each detected axial force F has reached the target axial force Fe (S314). If each detected axial force F does not reach the target axial force Fe (NO in S314), the process returns to S307 and the processes of S307 to S313 are repeated.

When each detected axial force F reaches the target axial force Fe (YES in S314), the tightening is completed (S315), the input is input to the tightening tool 14, and the tightening is completed. This tightening completion may be presented using a display device, for example, a monitor 50.

In this embodiment, after the tightening is completed, the tightening result information is taken from the tightening tool 14 to the controller 16-4 (S316), and the tightening result information is provided from the controller 16-4 to the server 16-5. To. In response to this, the server 16-5 displays the tightening result information (S317). This display may include installer information and tightening evaluation information.

The following processing may be included in this processing procedure.
a) Flange 10-1 and 10-2 are provided with a flange tag whose flange information is clearly indicated by a barcode, and flange information can be obtained from the flange tag using a barcode reader 72 and clearly indicated by a barcode on the gasket 12. Gasket information may be obtained from the gasket tag and referred to the tightening condition information.
b) It may be determined whether or not the acquired flange information and gasket information match the tightening information, and the appropriateness may be displayed.
c) The builder's identification information and skill information may be acquired from the ID card owned by the builder, and this builder information may be reflected in the tightening result information.

<Seal construction using tightening management>
FIG. 15 shows the transition of the detected axial force by the tightening management described above. In A, B, and C of FIG. 15, the coordinate axis y is radially taken from the center O corresponding to the tightening points P (= P1 to P8), and the axial force is taken in the direction away from the center O. F is the detected axial force and Fe is the target axial force. In this example, the case where the target axial force Fe is reached with the number of cycles N = 3 is shown.

When the number of cycles of the tightening point P is N = 1 and the axial force F is set to 30 (%) of the target axial force Fe (F = 0.3Fe), as shown in A of FIG. 15, the tightening shown as an example is shown. Each detection axial force F at the location P (= P1 to P8) is obtained. Even if the same axial force is set, the detected axial force F changes due to the influence of the elastic interaction of the flanges 10-1 and 10-2, and the polygon formed by each detected axial force F has some distortion. Occurs.

When the number of cycles N of the tightening points P is 2 and the axial force F is set to 70 (%) of the target axial force Fe (F = 0.7 Fe), as shown in B of FIG. 15, each tightening point P ( = Each detection axial force F of P1 to P8) is obtained.

When the number of cycles of the tightening points P is N = 3 and the axial force F is set to 100 (%) of the target axial force Fe (F = Fe), as shown in C of FIG. 15, each tightening point P (= P1). Each detected axial force F of to P8) is obtained, and the target axial force Fe can be reached.

<Effect of Examples>
(1) Since the matching tightening conditions are automatically selected from the tightening condition information, it is not necessary to force the worker to manage the tightening conditions, and the burden on the worker can be reduced from the tightening condition setting. It can be automated by avoiding the setting of tightening conditions that depend on the experience and intuition of the worker, and it is possible to prevent complicated work by written instructions and input mistakes and tightening mistakes by written instructions.
(2) Since this tightening condition can be provided individually and specifically to the controller 16-4 from the server 16-5, it is possible to avoid general work such as tightening all bolts with the same torque, and it is possible to realize a precise tightening result. .. It is possible to perform highly accurate torque management provided by the tightening condition information, and it is possible to reliably and efficiently tighten each bolt to be tightened with a different torque τ. It is possible to realize highly accurate seal construction management that far exceeds the management that relies on the individuality and intuition of the worker.
(3) Information processing using a computer using a tightening tool capable of tightening management can realize automation, high accuracy, simplification, and high efficiency of seal construction, and reliability that does not depend on the experience and intuition of the operator. High seal construction is possible.

[Other embodiments]
(1) In the above embodiment, the detection axial force of each axial force sensor 26-1, 26-2 ... 26-n for detecting the axial force of the bolt 6 to which the output torque T is applied from the tightening tool 14 is obtained. It may be configured to increase or decrease the torque value τ by using it. That is, in the seal construction management method, a step of detecting the axial force of the bolt 6 to which the output torque T is applied from the tightening tool 14, and a step of increasing or decreasing the torque value τ or the output torque T according to each detected axial force. It may be a construction management method including.
(2) In the above-described embodiment and embodiment, the controller 16-4 and the server 16-5 are described as independent devices, but the controller 16-4 may be provided with the function of the server 16-5. That is, the controller 16-4 and the server 16-5 may be integrally configured.
(3) The controller 16-4 may use a mobile information terminal such as a smartphone.
(4) In the above-described embodiment and embodiment, the controller 16-4 and the server 16-5 are set in one tightening tool 14, but the controller 16-4 and the server 16 are set in a plurality of tightening tools 14. -5 may be set, or a single server 16-5 may be provided in a plurality of controllers 16-4.

As described above, the most preferable embodiments and examples of the present invention have been described. The present invention is not limited to the above description. Various modifications and modifications can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the form or embodiment for carrying out the invention. Needless to say, such modifications and modifications are included in the scope of the present invention.

The seal construction management method, the seal construction management device, the seal construction management program, and the seal construction management system of the present invention automate and improve the accuracy of the seal construction by information processing using a computer using a tightening tool capable of tightening management. It is useful because it can realize simplification and high efficiency, and can perform highly reliable sealing construction that does not depend on the experience and intuition of the operator.

2-1 Seal construction management device 2-2 Seal construction management system 2-3 Seal construction management device 2-4 Seal construction management system 4 Seal construction part 6 Bolt 8 Nut 10-1, 10-2 Flange 12 Gasket 14 Tightening tool 16 -1, 16-2, 16-3 Control unit 16-4 Controller 16-5 Server 18 Grip 20 Device body 22 Socket 24 Trigger switch 26-1, 26-2 ... 26-n Axial force sensor 28 1st Function 30 Second function 32 Third function 34 Tightening condition setting unit 36 Cable 38 Front panel unit 40 Input operation unit 42 Display unit 44 Communication medium 46 Processing unit 48 Input operation unit 50 Monitor 52 Control unit 54 Motor 56 Torque sensor 58 Rotating axis 60 Processor 62 Storage unit 64 Input / output unit 68 Communication unit 72 Bar code reader 74 External memory 76-1 Green lamp 76-2 Red lamp 78-1 Temporary storage area 78-2 Storage area 80 Flange information 82 Gasket information 84 Work Person information 86 Tightening result information 88 Tightening condition table 90-1, 90-2 Torque value table 92 Processor 94 Storage unit 96 Input / output unit (I / O)
98 Communication unit 100 External memory 102 Touch panel 104 Line information unit 106 Flange information unit 108 Gasket information unit 110 Bolt information unit 112 Tightening condition information unit

Claims (11)

It is a seal construction management method in which multiple tightening points are set on the flange sandwiching the gasket, and bolts and nuts are provided at each tightening point to tighten.
The computer
A process of calculating or selecting a torque value to be applied to the bolt or the nut according to the number of cycles of tightening to the plurality of tightening points.
The process of setting the torque value in the tightening tool and
Each time the bolts or nuts at the plurality of tightening points are tightened with the torque value set in the tightening tool and the tightening to the plurality of tightening points makes one round, the tightening tool is subjected to the cycle according to the number of cycles. The process of changing the output torque of the tightening tool stepwise or continuously by setting the torque value, and
Seal construction management method to execute each process including. The seal construction management method according to claim 1, further comprising a step of detecting the number of cycles of the tightening tool or the tightening location. The seal construction management method according to claim 1, further comprising a step of setting the number of cycles of the tightening point or the tightening point on the tightening tool. The process of detecting the axial force of the bolt and
A step of detecting the number of cycles or the tightening point of the tightening tool by using the detected change information of the axial force and the information for identifying the bolt.
The seal construction management method according to claim 2. It is a seal construction management device in which multiple tightening points are set on the flange sandwiching the gasket, and bolts and nuts are provided at each tightening point to tighten.
The torque value to be applied to the bolt or nut is calculated or selected according to the number of rounds of tightening to the plurality of tightening points, the torque value is set in the tightening tool, and the tightening tool is used. Each time the bolts or nuts at the plurality of tightening points are tightened with the torque value set to, and the tightening to the plurality of tightening points makes one round, the tightening tool is provided with the torque value according to the number of rounds. A seal construction management device including a control means for changing the output torque of the tightening tool stepwise or continuously by setting . The seal construction management device according to claim 5, further comprising a detecting means for detecting the number of cycles of the tightening portion of the tightening tool or the tightening portion. The seal construction management device according to claim 5, wherein the tightening tool is provided with a setting means for setting the number of cycles of the tightening point or the tightening point. The seal construction management device according to any one of claims 5 to 7, wherein the control means is installed in the tightening tool or installed separately from the tightening tool and connected by wire or wirelessly. The detecting means includes an axial force sensor that detects the axial force of the bolt.
The seal according to claim 6, wherein the number of cycles of the tightening tool or the tightening point is detected by using the change information of the axial force detected by the axial force sensor and the information for identifying the bolt. Construction management device. It is a seal construction management program to be executed by a computer.
A function to calculate or select the torque value to be applied to a bolt or nut according to the number of rounds, which is the number of rounds of tightening to multiple tightening points set on the flange sandwiching the gasket.
The function to set the torque value in the tightening tool and
Each time the bolts or nuts at the plurality of tightening points are tightened with the torque value set in the tightening tool and the tightening to the plurality of tightening points makes one round, the tightening tool is subjected to the cycle according to the number of cycles. A function to change the output torque of the tightening tool step by step or continuously by setting the torque value, and
A seal construction management program to realize this with the computer. It is a seal construction management system in which multiple tightening points are set on the flange sandwiching the gasket, and bolts and nuts are provided at each tightening point to tighten.
With a tightening tool that can control the output torque applied to the bolt or nut stepwise or continuously.
The torque value to be applied to the bolt or nut is calculated or selected according to the number of rounds, which is the number of rounds of tightening to the plurality of tightening points by being connected to the tightening tool by wire or wirelessly, and the torque value is calculated. Is set in the tightening tool, and the bolts or nuts in the plurality of tightening points are tightened with the torque value set in the tightening tool, and each time the tightening to the plurality of tightening points is completed, the tightening tool is used. A controller that changes the output torque of the tightening tool stepwise or continuously by setting the torque value according to the number of rounds.
A seal construction management system equipped with.

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