JP4685268B2 - Resin joint energization control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply control device for a resin joint capable of preventing occurrence of a thermal welding failure by detecting an abnormality in a temperature sensor by providing two temperature sensors. SOLUTION: The power supply control device for the rein joint thermally welds resin pipe members 2A, 2B by supplying controlled power to a heating heater 6 arranged inside the resin joint 4. The device is provided with a power supply section 22 for supplying power the heating heater, a predetermined current supplying time storage section 24 for previously storing the power supply information regarding the power supply hour corresponding to temperature, a first and a second two temperature sensors 28, 29 for detecting temperature, a comparing section 33 for comparing detected values obtained by the first and the second temperature sensors, and a thermally weld controlling section 26 for controlling power supply to the heating heater based on the comparison result from the comparing section, a detected value obtained by either one of the first or second temperature sensor and the power supplying hour stored in the predetermined current supplying time storage section. In this way, by providing two temperature sensors to detect temperature difference between them, the abnormality in the temperature sensors is detected to prevent the occurrence of a thermal welding failure in advance.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an energization control device for a resin joint that connects resin pipe members used when flowing gas, water, or the like, or passing an optical fiber or the like.
[0002]
[Prior art]
In general, pipe members made of resin (polyethylene, polybudene, polypropylene, etc.) tend to be frequently used for flowing gas, water, hot water, sewage, etc., or passing communication cables such as optical fibers. When constructing or repairing these pipe members, use a resin joint embedded with a heater inside, and generate heat by energizing this heater, and the resin joint and resin pipe member Are to be fused.
At this time, the electric power supplied to the heater of the resin joint is often different depending on the type of joint, etc., and the control parameters such as voltage, current, energization time etc. are set to different values for each type of joint. Yes. Therefore, in order to energize the resin joint, an energization control device adapted to supply electric power corresponding to the control parameter (see Japanese Patent Laid-Open Nos. 9-24548 and 9-123286, etc.) Is used.
[0003]
The control data constituting the control parameter is generally recorded in a bar code label attached to the resin joint, and the operator can read the bar code label prior to the fusing operation. The data is obtained by reading the bar code with an attached bar code reader. In the above bar code label information, in addition to the joint manufacturer name and dimensions, the initial voltage value, the standard resistance value of the heater, the standard energization amount, the fluctuation range of the resistance value, and the target energization amount are calculated as control data. The correction coefficient is recorded.
When performing the fusing operation, first read the control data of the bar code label with a bar code reader, and measure the environmental temperature at that time from the temperature sensor for measuring the environmental temperature attached to the energization controller itself. To do. In the control system of this energization control device, the energization time for the resin joint specified by the control data of the bar code label and the correction coefficient for the ambient temperature of this energization time are determined in advance. The energization time is set in accordance with the ambient temperature around. For example, when this heat-sealing operation is performed in the cold of winter, the resin joint itself is very cold, so it is necessary to energize for a longer time, and conversely, this heat-sealing operation is performed in the hot summer. In this case, energization for a short period of time is sufficient, and if energization that is too long at this time is performed, the resin is excessively melted, resulting in poor fusion.
[0004]
[Problems to be solved by the invention]
By the way, since the heat-sealing operation of the resin joint as described above is naturally performed outdoors, the energization control device itself is placed in a poor environment and water or mud adheres to it. Alternatively, the energization control device itself is often handled relatively roughly.
In this case, the above-described temperature sensor for measuring the environmental temperature is inevitably provided outside the housing of the apparatus main body because it is necessary to accurately measure the ambient temperature. For this reason, the temperature sensor itself is damaged or deteriorated, so that an accurate environmental temperature cannot be measured, resulting in problems such as poor fusion.
[0005]
In order to solve this problem, the temperature sensor itself is attached to a place where it is relatively difficult to damage, such as the inside of the device body, and the ambient temperature is adjusted by forcibly taking in the outside air with a cooling fan or the like and applying the outside air to it. Although the measurement is also performed, in this case, not only the structure becomes complicated, but also the forced air is applied to the temperature sensor, so the measured value does not indicate an accurate ambient temperature.
The present invention has been devised to pay attention to the above problems and to effectively solve them. An object of the present invention is to provide an energization control device for a resin joint that can detect an abnormality of a temperature sensor and prevent the occurrence of poor fusion by providing two temperature sensors. .
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a resin joint energization control device for fusing a resin pipe member by performing controlled energization to a heater provided inside a resin joint. A power supply unit that supplies power, a set energization time storage unit that preliminarily stores energization information related to a temperature-dependent energization time, a first temperature sensor installed outside a housing that houses the apparatus main body, and the housing Of the first temperature sensor, a comparison unit comparing the detection values of the first and second temperature sensors, a comparison result of the comparison unit, and the first and second temperature sensors. And a fusion controller that controls energization of the heater based on the detected value of any one of the temperature sensors and the energization time stored in the set energization time storage unit. Energization control equipment for plastic joints It is.
As a result, if the difference between the detected values of the two temperature sensors is within a predetermined value, it is recognized that both temperature sensors are functioning normally, and a normal heat-sealing operation is performed. When the difference is larger than the predetermined value, it is recognized that some abnormality or failure has occurred in the temperature sensor, and the heater is not energized. Can be prevented.
In addition, the energization time and the like are determined by using the detection value of the first temperature sensor installed outside the housing of the apparatus body as the environmental temperature (outside air temperature), and the temperature inside the housing tends to become higher than the outside air. Since the detection value of the temperature sensor 2 is used only for determining whether or not the first temperature sensor is operating normally, it is possible to more accurately determine whether the first temperature sensor is damaged. Can be recognized.
[0007]
According to a second aspect of the present invention, there is provided a resin joint energization control device for fusing a resin pipe member by performing controlled energization to a heater provided inside a resin joint. A power supply unit that supplies power, a set energization time storage unit that preliminarily stores energization information related to temperature-dependent energization time, a bar code reader that reads control data related to the resin joint, and a first for detecting environmental temperature A temperature sensor, a second temperature sensor installed in the case of the barcode reader, a comparison unit for comparing detection values of the first and second temperature sensors, and a comparison result of the comparison unit, The energization of the heater is controlled based on the detection value of one of the first and second temperature sensors and the energization time stored in the set energization time storage unit. An energization control apparatus for resin-made joint, characterized in that a RuToruchaku controller.
[0008]
In this case, for example , as defined in claim 3 , the fuser control unit has a notification unit that notifies the operator of a predetermined message, and the fusion control unit gives a negative result of energization in the comparison result in the comparison unit. When indicated, the notifying means may be informed so that the heater is not energized.
According to this, the operator can surely recognize an abnormal state such as a failure of the temperature sensor.
[0009]
Further, for example, as defined in claim 4 , the apparatus has a trace storage unit that stores fusion information including at least a time when the fusion operation was performed last time, and the fusion control unit Based on the fusion information stored in the storage unit, when the predetermined time has not elapsed since the previous fusion operation, the heater is controlled not to be energized.
According to this, it is possible to prepare an environment in which the two temperature sensors operate reliably.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an energization control device for a resin joint according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing a usage state of an energization control device for a resin joint according to the present invention, FIG. 2 is a perspective view of the energization control device, and FIG. 3 is a block configuration diagram of the energization control device.
As shown in FIGS. 1 and 2, here, a state is shown in which the end portions of the two resin pipe members 2 </ b> A and 2 </ b> B are inserted into the cylindrical resin joint 4 and attached. On the inner surface side, the heater 6 is embedded over substantially the entire inner peripheral surface. Input terminals 8 and 8 for receiving electric power are provided at both ends of the heater 6 so as to protrude outward.
Further, a bar code label 10 including control data of the joint 4 at the time of fusion is attached to the surface of the resin joint 4 at the time of factory shipment from the manufacturer.
[0011]
And in the vicinity of the resin joint 4, an energization control device 12 is installed for supplying fusion power thereto. The energization control device 12 has a device main body 14 that houses main components, and the outside thereof is covered with a housing 13. Two output cables 16 are drawn out from the apparatus main body 14, and connectors 18, 18 provided at the distal ends thereof are detachably connected to the input terminals 8, 8 of the resin joint 4 to control electric power. To supply.
For example, necessary power is input to the apparatus main body 14 from an external power source. As this external power source, a normal commercial AC power source of 100V, for example, a generator for welding or a generator for lighting in which the output voltage is small when no load is applied and the output voltage increases when a load is applied. Etc. can be used.
[0012]
Further, for example, an optical bar code reader 20 for reading predetermined data is connected to the apparatus main body 14 via a bar code wiring 19, thereby recording on the bar code label 10 of the joint 4. It is possible to read barcodes including control data.
As described above, in addition to the joint manufacturer name and dimensions, the information on the bar code label 10 includes initial voltage values, standard resistance values of heaters, standard energization amounts, and variations in resistance values as control data. The width, the energization time at the reference temperature for various joints, the correction coefficient for the energization time with respect to the environmental temperature, and the like are recorded. As shown in FIG. 2, a handle 17 for holding the device body 14 is provided on the upper portion of the housing 13 of the apparatus main body 14, and a cloth bag 21 for housing components is provided on the side surface of the housing 13. Is provided.
[0013]
As shown in FIG. 3, the apparatus main body 14 surrounded by the casing 13 includes power supply unit 22 for supplying power to the heater 6 (see FIG. 1) and energization information related to energization time depending on temperature. A preset energization time storage unit 24 stored in advance, and a fusion control unit 26 made of, for example, a microcomputer for controlling the operation of the power supply unit 22 based on control data input from the barcode reader 20 and the like. ing. In addition, the apparatus includes first and second temperature sensors 28 and 29 that are characteristic of the present invention. Here, the first temperature sensor 28 detects the ambient temperature such as the outside air temperature or the temperature of the joint 4, for example, outside the housing 13, that is, as shown in FIG. The second temperature sensor 29 is provided in the housing 13 (a portion that is relatively difficult to break) and in the vicinity of the vent hole 31. In this case, when the temperature sensors 28 and 29 are damaged or the like, an extremely large or small value is set.
[0014]
Further, this apparatus later compares the detection values of the two temperature sensors 28 and 29, the actual voltage, current and time during the fusing operation, the date and time when the fusing operation is performed, etc. Various operation data at the time of fusing operation are stored so that tracing and tracing can be performed, for example, a storage unit 30 for tracing made of a nonvolatile memory, and data necessary for calculation by the fusing control unit 26 are temporarily stored. For example, a temporary storage unit 32 made of RAM or the like, a display panel 34 as a notification means made up of a liquid crystal panel for displaying the contents of the respective storage units or predetermined instructions as a message, and data for manually inputting necessary data An operation panel 36 having a function of an input unit and an alarm mechanism 38 for issuing a warning when an abnormal state is detected are provided. Note that the set energization time storage unit 24 and the trace storage unit 30 may use the same non-volatile memory by dividing the area. Here, as the first and second temperature sensors 28 and 29, thermocouples capable of measuring the temperature with high accuracy of about ± 1 ° C., for example, can be used.
[0015]
Next, the heat fusion operation of the resin pipe member performed using the energization control device 12 configured as described above will be described with reference to FIG.
FIG. 4 is a flowchart showing each step of the heat fusion operation.
First, before energization is started, the two resin pipe members 2A and 2B to be heat-sealed are inserted into the cylindrical resin joint 4 as shown in FIG. 1 until the ends abut against each other. The connectors 18 and 18 of the energization control device 12 are connected to the input terminals 8 and 8 of the heater 6. In this state, the operator first reads the information on the barcode label 10 attached to the joint 4 by the barcode reader 20. As a result, the control data of the initial voltage value determined for the joint as well as the manufacturer data of the joint as described above are input to the fusion controller 26.
[0016]
At the same time, the detection values of the first and second temperature sensors 28 and 29 are read and the temperature is measured normally on the condition that a predetermined time has elapsed since the last heat fusion operation was performed. When it is determined that the heater 6 is normally measured, the heater 6 is energized based on the environmental temperature measured at that time, that is, the energizing time is obtained, and the energization is started accordingly. Then, actual heat fusion is performed.
On the other hand, if the temperature difference between the two temperature sensors 28 and 29 is too large as a result of comparison between the two temperature sensors 28 and 29, one of the temperature sensors is damaged and the normal environmental temperature can be measured. Therefore, the heater 6 is not energized, and at the same time, the operator is informed accordingly.
[0017]
Next, the above operation will be specifically described with reference to FIG.
First, as shown in FIG. 1, as shown in FIG. 1, the ends of both resin pipe members 2 </ b> A and 2 </ b> B are inserted into the resin joint 4 to make a match, and the input terminal 8 of the heater 6 is connected to the energization control device 12. When the connector 18 of the output cable 16 is connected, the energization control device 12 is activated.
And an operator reads the control information of the barcode label 10 stuck on the resin coupling 4 using the barcode reader 20 (S1). By reading this control information, the manufacturer, type, energization time at the reference temperature, and the like of the resin joint 4 are specified.
[0018]
Next, the fusion control unit 26 reads the date and time data when the previous heat fusion operation was performed from the trace storage unit 30 (S2). Then, the fusion control unit 26 determines whether or not a predetermined time, for example, 6 hours has elapsed since the previous heat fusion operation was performed based on the time of the built-in timer (S3). The reason for this determination is that once the fusion operation is performed, the apparatus main body 14 surrounded by the casing 13 becomes quite hot. In this state, the second temperature sensor 29 installed in the casing 13 This is because the detected value is influenced by the residual heat at the time of heat fusion and detects a high temperature, and it cannot be determined whether or not the first temperature sensor 28 is operating normally.
Accordingly, whether or not a sufficient time required for the apparatus main body 14 that has been heated in accordance with the heat fusion operation as described above to sufficiently cool to the environmental temperature, for example, six hours has passed. to decide.
In the case of NO in S3, that is, when a sufficient time has not elapsed since the previous heat fusion operation, a message indicating that the elapsed time is insufficient is displayed on the display panel 34 and the operator is informed accordingly. Notification (S4), and the fusion controller 26 does not energize the heater 6. That is, the energization is stopped (S5).
On the other hand, if YES in S3, that is, if 6 hours have passed since the previous heat sealing operation and the apparatus main body 14 is sufficiently cooled, the detection value T1 of the first temperature sensor 28 is captured. Then, the outside air temperature (environment temperature) is measured (S6).
[0019]
Next, the detection value T2 of the second temperature sensor 29 is taken in and the internal temperature of the housing 13 is measured (S7).
Next, it is determined whether or not the absolute value of the temperature difference between the detected values T1 and T2 is a predetermined temperature difference, for example, 7 ° C. or less (S8). If the result of this determination is YES, that is, if the temperature difference between the detected values T1 and T2 is 7 ° C. or less, the fusion control unit 26 is provided with a first temperature provided in a portion that is relatively easily damaged. It is recognized that the sensor 28 is operating normally without being damaged. Then, a message indicating that the first temperature sensor 28 is operating normally is displayed on the display panel 34 to allow the operator to recognize this (S9), and at the same time, the environmental temperature is detected. The energization of the heater 6 is started for the energization time calculated based on the detection value of the first temperature sensor 28, and the actual heat fusion operation is performed (S10).
[0020]
On the other hand, in the case of NO in S8, that is, when both the detected values of the first and second temperature sensors 28 and 29 are larger than 7 ° C., the temperature sensor is extremely large or small when it is damaged. Therefore, the fusion control unit 26 recognizes that the first temperature sensor 28 installed in a portion that is relatively easily damaged is damaged, and causes a temperature sensor abnormality to the display panel 34. Is displayed and the operator is made aware of this (S11). At the same time, the fusion controller 26 does not energize the heater 6. That is, the energization is stopped (S5). At this time, if the alarm mechanism 38 is also activated, the operator can be recognized more accurately.
The operator who recognizes this sensor abnormality checks the first temperature sensor 28. In this case, the threshold value of the temperature difference between the temperature sensors 28 and 29 is set to 7 ° C., which is determined from the temperature margin of the general resin joint 4. However, this threshold value is not limited to 7 ° C., and may be set more strictly and a little smaller value, or a larger value if the margin is large.
[0021]
As described above, the second temperature sensor 29 is provided in a place that is relatively difficult to damage, for example, the housing 13, and the environment temperature is measured based on the detected value, so that the place is relatively easy to break. Since it is possible to determine whether or not the first temperature sensor 28 that must be provided is operating normally without failure, it is possible to reliably perform the heat fusion operation without causing poor fusion.
In the above-described embodiment, the first temperature sensor 28 is provided in the pocket 21A of the cloth bag 21 that is exposed to the outside air and easily damaged, and the outside temperature (environment temperature) is measured. The internal temperature is measured by setting the temperature sensor 29 in the housing 13 which is a place where damage is relatively difficult. However, the present invention is not limited to this. For example, two pockets 21A for the cloth bag 21 are provided, and the other one is provided. A second temperature sensor 29 may be installed in the pocket to measure the outside air temperature. In this case, both the first and second temperature sensors 28 and 29 are provided at a place where they are relatively easily damaged. However, since the probability that the two temperature sensors 28 and 29 are damaged at the same time is low, it is effective. It is.
[0022]
The operation flow in this case is shown in FIG. 5, for example.
If the second temperature sensor 29 is not provided in the housing 13, even if the temperature of the apparatus main body 14 rises, it does not relate to the detected value, so from the flow in FIG. 1, steps S2, S3, S4 are performed. It becomes the flow which removed each process of. In this case, when both the temperature sensors 28 and 29 are normal, the detection values T1 and T2 in step S8 are substantially the same value.
In the above-described embodiment, the second temperature sensor 29 is provided in the housing 13 as a portion that is relatively difficult to break. However, the present invention is not limited to this. For example, the second temperature sensor 29 is installed in the case 20A of the barcode reader 20. Thus, the second temperature sensor 29 may not be exposed to the outside. The operation flow in this case is the same as that shown in FIG.
In the above embodiment, the first temperature sensor 28 is installed in the pocket 21A of the cloth bag 21, but the present invention is not limited to this.
[0023]
【The invention's effect】
As described above, according to the energization control device for a resin joint of the present invention, the following excellent operational effects can be exhibited.
According to the invention according to claim 1 and the claim cited therein , if the difference between the detected values of the two temperature sensors is within a predetermined value, it is recognized that both the temperature sensors are functioning normally. When the difference between the two detection values is larger than the predetermined value, it is recognized that there is some abnormality or failure in the temperature sensor and the heater is not energized. As a result, the occurrence of poor fusion can be prevented beforehand.
In addition, the energization time and the like are determined by using the detection value of the first temperature sensor installed outside the housing of the apparatus body as the environmental temperature (outside air temperature), and the temperature inside the housing tends to become higher than the outside air. Since the detection value of the temperature sensor 2 is used only for determining whether or not the first temperature sensor is operating normally, it is possible to more accurately determine whether the first temperature sensor is damaged. Can be recognized.
According to the invention according to claim 2 and the claim cited therein, if the difference between the detection values of the two temperature sensors is within a predetermined value, it is recognized that both the temperature sensors are functioning normally, and When the difference between the two detection values is larger than the predetermined value, it is recognized that there is some abnormality or failure in the temperature sensor and the heater is not energized. As a result, the occurrence of poor fusion can be prevented beforehand.
According to the invention of claim 3 , the operator can reliably recognize an abnormal state such as a failure of the temperature sensor.
According to the invention which concerns on Claim 4 , the environment where two temperature sensors operate | move reliably can be prepared.
[Brief description of the drawings]
FIG. 1 is a diagram showing a use state of a current control device for a resin joint according to the present invention.
FIG. 2 is a perspective view showing an energization control device.
FIG. 3 is a block diagram of an energization control device.
FIG. 4 is a flowchart showing each step of the heat fusion operation.
FIG. 5 is a flowchart showing each step of another heat-sealing operation.
[Explanation of symbols]
2A, 2B Resin pipe member 4 Resin joint 6 Heater 12 Heating controller 12 Energization control device 13 Housing 14 Device main body 20 Bar code reader 21 Fabric bag 22 Power supply unit 24 Set energization time storage unit 26 Fusion control unit 28 First temperature sensor 29 Second temperature sensor 30 Trace storage unit 33 Comparison unit 34 Display panel (informing means)

Claims (4)

In the energization control device of the resin joint that fuses the resin pipe member by performing controlled energization to the heater provided inside the resin joint,
A power supply for supplying power to the heater;
A set energization time storage unit that pre-stores energization information related to the energization time depending on temperature;
A first temperature sensor installed outside the housing that houses the apparatus body;
A second temperature sensor installed inside the housing;
A comparison unit for comparing detection values of the first and second temperature sensors;
The heater based on the comparison result of the comparison unit, the detection value of one of the first and second temperature sensors, and the energization time stored in the set energization time storage unit An energization control device for a plastic joint, comprising: a fusion controller that controls energization of the resin joint. In the energization control device of the resin joint that fuses the resin pipe member by performing controlled energization to the heater provided inside the resin joint,
A power supply for supplying power to the heater;
A set energization time storage unit that pre-stores energization information related to the energization time depending on temperature;
A barcode reader for reading control data related to the resin joint;
A first temperature sensor for detecting environmental temperature;
A second temperature sensor installed in the case of the barcode reader;
A comparison unit for comparing detection values of the first and second temperature sensors;
The heater based on the comparison result of the comparison unit, the detection value of one of the first and second temperature sensors, and the energization time stored in the set energization time storage unit An energization control device for a plastic joint, comprising: a fusion controller that controls energization of the resin joint. Informing means for notifying an operator of a predetermined message, and the fusion control section informs the informing means to notify that when the comparison result in the comparison section shows a negative result in energization. , electrification control apparatus of the resin joint according to claim 1, wherein the controller controls so as not to perform energization of the heater. At least a trace storage unit that stores fusion information including the time when the fusion operation was performed last time, and the fusion control unit is based on the fusion information stored in the trace storage unit. by the time the last of the fused operation has not elapsed the predetermined time, the resin joint according to any one of claims 1 to 3, wherein the controller controls so as not to perform energization of the heater Energization control device.

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