JP3592619B2 - Connection mechanism for electrical equipment and temperature measurement device using the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to a method of sending a refrigerant such as air into a device via a receptacle attached to the device and a connector connected to the same, thereby increasing a temperature rise and an atmosphere in a connection portion between the device and a signal line cable or a signal line in a refrigerant passage. The present invention relates to a connection mechanism of an electric device for preventing a change in the temperature and a temperature measuring device using the same.
[0002]
[Prior art]
A high-temperature type temperature measuring probe used in a blast furnace or the like includes a probe main body in which a thermocouple is disposed, and an upper terminal box. In using this temperature measuring probe, the terminal box becomes hot due to heat transfer from the probe body or heat from the surroundings. The junction between the thermocouple and the signal line in the connection cable becomes the contact part of the compensating conductor.If this part is heated, it may cause measurement errors. Had been used.
FIGS. 5A and 5B show a conventional method of cooling a terminal box. In the method shown in FIG. 5A, a connection terminal of a signal line is connected to one terminal box 71 of a temperature measuring probe 70. And a connection port (for example, a socket or a nipple) 74 of a pipe 73 for sending air as a cooling gas is provided on the other side. In use, a signal from the thermocouple is transmitted to a signal line cable 76 via a connector 75 which is a connection terminal connected to a receptacle 72, and cooling air is introduced into a terminal box 71 from a pipe 73 and a connection port 74. Then, the terminal box 71 was cooled.
In the conventional method of cooling a terminal box in FIG. 5B, a receptacle 80 is provided on one side of a terminal box 79 of a temperature measuring probe 78 so as to protrude from the terminal box 79 via a support member 81, and A connection port (for example, a socket or a nipple) 84 of a pipe 83 having a sufficiently large diameter is provided around a connection line 82 of the receptacle 80, and a connection cable 85 connected to a thermocouple is connected to the receptacle 80 and a connector connected thereto. The cooling gas is connected to the terminal box 79 via the pipe 83 and the connection port 84 thereof, and is cooled by the usual connector connection via the connector box 86.
[0003]
[Problems to be solved by the invention]
However, in the method of FIG. 5A, it is necessary to provide the terminal box 71 with the receptacle 72 which is the connection port of the connection cable 76 and the connection port 74 of the pipe 73 for sending the cooling gas, which causes a problem that the construction takes time. there were.
Furthermore, when the signal line (compensating lead) is exposed to a special atmosphere such as high temperature, oxidizing gas or reducing gas, the signal line is likely to cause deterioration of the signal line and decrease in insulation strength. was there.
Further, in the method of FIG. 5B, the connection port 84 of the connection pipe 85 and the receptacle 80 as the connection port of the connection cable 85 is provided on one side of the terminal box 79, which is excellent in cooling the signal line. However, the number of connection points is substantially the same as in the case of FIG.
Particularly, in the connection work of the pipes 73 and 83 for sending the cooling gas, it is necessary to use a joint (nipple, socket, union) using a screw or a flange in some cases. There is a problem that it takes time and effort to replace the temperature measuring probes 70 and 78 that are consumed in a short period of time.
In addition, such a problem generally occurs not only in a temperature measuring probe but also in an electric device used in a high-temperature atmosphere.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connection mechanism of an electric device and a temperature measuring device using the same, which can extremely easily install a signal line and a refrigerant pipe such as a cooling gas. And
[0004]
[Means for Solving the Problems]
A connection mechanism for an electric device according to a first aspect of the present invention that meets the above object is a connection mechanism for an electric device that performs electric wiring via a connector corresponding to a receptacle provided in the electric device,
The receptacle and the connector are provided with first and second insertion holes for communicating a control medium into the electrical device, and outside the signal line connected to the connector, from the base end side into the electrical device. The flexible tube is covered with a gap through which the control medium flows . Here, the control medium includes, in addition to the refrigerant for cooling the inside of the device, a sealing material made of a gas or a liquid that protects the inside of the device from, for example, a corrosive atmosphere, an oxidizing atmosphere, a reducing atmosphere, or the like.
A connection mechanism for an electric device according to a second invention is the connection mechanism for an electric device according to the first invention, wherein the control medium is a refrigerant, and the electric device is a temperature measuring probe. The refrigerant flowing through the receptacle and the connector cools the signal line of the terminal box and the medium passage of the temperature measuring probe and a connection portion of the signal line.
[0005]
A connection mechanism for electrical equipment according to a third aspect of the present invention is the connection mechanism for electrical equipment of the second aspect , wherein compressed air serving as the refrigerant is provided in a gap between the flexible tube and the signal line at a base end side of the flexible tube. There is a connection port for introducing
A connection mechanism for an electric device according to a fourth invention is the connection mechanism for an electric device according to the first to third inventions, wherein one of the receptacle and the connector has a male pin, and the other has the male pin. Is provided with a female hole into which is fitted.
[0006]
A temperature measuring apparatus using a connection mechanism for electrical equipment according to a fifth aspect of the present invention has a terminal box on an upper part, and the terminal box has a temperature measuring probe provided with a receptacle; In a temperature measurement device having a connector connected to a receptacle of the box and a connection cable provided at one end,
The receptacle and the connector are provided with first and second insertion holes for communicating refrigerant to the terminal box, and outside the signal line connected to the connector, from the base end side into the temperature measuring probe. The flexible tube is covered with a gap through which the refrigerant flows .
Refrigerant passes through the gap between the signal line and the flexible tube, passes through the first and second insertion holes of the receptacle and the connector, and enters the terminal box, thereby cooling the signal line, the connector and the receptacle. .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
Here, FIG. 1 is a cross-sectional view around a terminal box of a temperature measuring device using a connection mechanism for electric equipment according to an embodiment of the present invention, FIG. 2 is an overall view of the temperature measuring device, and FIG. FIGS. 4A to 4D are partial cross-sectional views of the measuring device, illustrating the receptacle and the connector.
As shown in FIGS. 1 and 2, a temperature measuring device 10 using a connection mechanism of an electric device according to an embodiment of the present invention has a terminal box 11 provided on an upper portion thereof. It has a temperature measuring probe 12 as an example, and a connection cable 15 provided at one end with a connector 14 connected to the receptacle 13 of the terminal box 11. Hereinafter, these will be described in detail.
[0008]
The temperature measuring probe 12 includes, for example, an outer tube 17, a middle tube 18, and an inner tube 19 made of a refractory material serving as protective tubes below the flange 16, and a thermocouple is disposed inside the inner tube 19. . Wires (for example, platinum wires) 20 and 21 constituting the thermocouple are guided to the upper terminal box 11 and connected to connection pins 22 and 23 of the upper receptacle 13. The terminal box 11 is made of a metal container, and the receptacle 13 is attached to one protruding portion 24. The receptacle 13 is a male connection terminal, and the terminal box 11 has a cover 25 which is opened and closed by screws at an obliquely upper portion, and the cover 25 can be opened to inspect the inside.
As shown in FIGS. 1 and 4A, the receptacle 13 is provided with a plurality of insertion holes 28 through a support member 27 made of, for example, ceramics or resin, which is an insulator, inside a surrounding metal mounting bracket 26. The connection pins 22 and 23 are fixed to the insertion holes 28 and 29 to the outside so as to protrude by a predetermined length. Reference numeral 33 denotes a stopper for the mounting bracket 26, reference numeral 34 denotes a stop ring for preventing the support member 27 from coming off from the mounting bracket 26, and reference numerals 34a and 35a denote thermocouple insulating tubes.
The insertion holes 30 to 32 (an example of a first insertion hole) provided in the support member 27 have no connection pin and are in communication from the outside to the inside, and are air as a control medium and an example of a refrigerant. The cooling gas such as enters the terminal box 11 freely and is exhausted from an outlet 35 formed in a part of the terminal box 11.
[0009]
As shown in FIG. 1, the connector 14 paired with the receptacle 13 has a metal mounting bracket 36 and a supporting member 37 made of ceramics or plastic having an insulating property and fixed inside the mounting bracket 36. I have. As shown in FIG. 4B, the supporting member 37 has five insertion holes 38 to 42 corresponding to the insertion holes 28 to 32, and the projection type connection pins 22 are formed in the insertion holes 38 and 39. , 23 into which female connection pins 43, 44 are arranged so that electrical connection between the receptacle 13 and the connector 14 can be performed. The insertion holes 40 to 42 (one example of the second insertion hole) correspond to the insertion holes 30 to 32 of the receptacle 13, respectively, and the cooling gas flows from the connector 14 to the receptacle 13 through the insertion holes 40 to 42. . In addition, a stopper 45 is provided on the mounting bracket 36, which corresponds to an end of the mounting bracket 26. When the connector 14 is mounted on the receptacle 13, it is screwed into a male screw 46 formed on the end of the mounting bracket 26. The female screw 47 has a fixing cap 48 formed inside.
[0010]
A signal line 50 made of a compensating lead is connected to the inner ends of the female connection pins 43 and 44, and a flexible tube 51 that covers the outside with a gap is attached via a fixing bracket 52. I have. The above-described insertion holes 40 to 42 and the gap between the flexible tube 51 and the signal line 50 communicate with each other, and the cooling gas flowing between the flexible tube 51 and the signal line 50 is discharged through the insertion holes 40 to 42. It has become.
[0011]
Further, the insertion holes 30 to 32 and 40 to 42 formed in the receptacle 13 and the connector 14 can be formed by removing specific connection pins of a commercially available receptacle and connector.
In the above-described embodiment, the five insertion holes 28 to 32 and 38 to 42 are provided in the support members 27 and 37 of the receptacle 13 and the connector 14, but as shown in FIGS. 4C and 4D. The supporting member 27 of the receptacle 13 is provided with a large-diameter insertion hole 53 (an example of a first insertion hole), and the supporting member 37 of the connector 14 is provided with a large-diameter insertion hole 54 (second insertion hole). The cooling gas flowing inside the flexible tube 51 can be flowed from the insertion hole 54 to the insertion hole 53 to form a flow path for the cooling gas from the connector 14 to the receptacle 13.
[0012]
Next, the vicinity of the inlet for the cooling gas provided on the base end side of the flexible tube 51 will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the proximal end side of the flexible tube 51 is attached to a connection port 57 on one side of a T-shaped joint 56 via a connection fitting 55. A signal wire 50 is drawn out to a connection port 58 on the other side of the T-shaped joint 56 via a seal fitting 59, and a male connector of the one-touch coupler for air is connected to an intermediate connection port 60 of the T-shaped joint 56 via a modified elbow 61. A joint (an example of a connection port serving as a refrigerant inlet) 62 is attached. The female joint 63 of the one-touch coupler paired with the male joint 62 is connected to a compressor 65 via an air hose 64.
On the other hand, a connector 66, which is an example of a connection terminal, is provided at an end of the signal wire 50 that has exited the seal fitting 59, and is connected to a temperature measuring device main body 67.
In this embodiment, the male joint 62 of the one-touch coupler for air is attached to the intermediate connection port 60 of the T-shaped joint 56 via the modified elbow 61, but other intermediate joints can be used without using the modified elbow 61. It is also possible to attach a male joint of a one-touch coupler, a hose nipple, or the like via a (reducer, nipple, or the like).
[0013]
Next, a method of using the temperature measurement device 10 using the connection mechanism for electrical equipment according to one embodiment of the present invention will be described.
First, the connector 14 provided at the front end of the connection cable 15 is attached to the receptacle 13 provided on one side of the terminal box 11 of the temperature measuring probe 12 arranged at a predetermined position. The female joint 63 of the one-touch coupler is attached to the male joint 62 of the one-touch coupler attached to the T-shaped joint 56. A connector 66 provided at an end of the signal line 50 led out from the T-shaped joint 56 is connected to a temperature measuring device main body 67.
In this state, air, which is an example of cooling gas, flows from the compressor 65 through the T-shaped joint 56 in the connection cable 15, that is, in the gap between the flexible tube 51 and the signal line 50, and through the insertion holes 40 to 40 of the connector 14. From 42, it enters the insertion holes 30-32 of the receptacle 13, enters the terminal box 11, and is discharged from the discharge port 35 to the outside. In this case, the pressure of the compressor 65 is set to about 1 to 10 kgf / cm ² , depending on the length of the connection cable 15. The flexible tube 51 should be able to withstand this pressure.
[0014]
By the above operation, air (compressed air) as a cooling gas flows in the connection cable 15, the connector 14, the receptacle 13, and the terminal box 11, so that this portion is cooled to prevent a rise in temperature and a change in atmosphere.
When replacing the temperature measurement probe 12, the fixing cap 48 of the connector 14 is turned to pull out the connector 14 from the receptacle 13, and the connection cable 15 and the temperature measurement probe 12 are disconnected. Then, after attaching a new temperature measuring probe, the connector 14 and the receptacle 13 are connected. By the simple operation described above, the signal line 50 and the piping for the cooling gas can be attached and detached, and the operation is simplified.
In actual use, the compressed air from the compressor 65 is dehumidified to about 2 kgf / cm ² , enters the T-shaped joint 56, passes through the flexible tube 51, and enters the connector 14 and the receptacle 13. As a result, the signal line 50 in the medium passage, the connector 14 serving as a connection portion of the signal line 50, the receptacle 13, and the terminal box 11 are cooled, and even if the ambient temperature of the terminal box 11 is about 300 ° C., The temperature of the inside, that is, the temperature of the internal device was at most about 100 ° C., and it was confirmed that the device could be used sufficiently. Naturally, it can be used at normal temperature (30 to 40 ° C.) without any trouble.
[0015]
In the above embodiment, the connection pins 22 and 23 which are male pins are used for the receptacle 13, and the connection pins (connection terminals) 43 and 44 of the female holes are used for the connector 14. As the connection pin, a female connection pin can be used for the receptacle.
In addition, the receptacle 13 and the connector 14 are not limited to those shown in the present embodiment. In short, any type of connection device may be used as long as the connection and removal can be easily performed.
Further, in the above embodiment, the example in which the connection mechanism of the electric device according to the embodiment of the present invention is applied to the temperature measurement probe 12 has been described. Even if it does, the present invention is applied.
Further, in the above embodiment, air (compressed air) is used as the refrigerant, but other gas (for example, nitrogen gas) or water may be used. If water is used as the coolant, it may be run-down from electrical equipment, and in some cases, a return path for water may be provided in the receptacle, connector, and connection cable.
[0016]
【The invention's effect】
In the connection mechanism for an electric device according to any one of claims 1 to 4 , the receptacle and the connector are provided with first and second insertion holes for communicating a control medium into the electric device, and the outside of a signal line connected to the connector. In addition, since the flexible tube is covered with a gap through which the control medium flows from the base end into the electric device, the inside of the electric device can be cooled or protected by the control medium.
Since the receptacle can be attached to and detached from the connector with one touch, the medium path of the control medium can be attached and detached in accordance with the attachment and detachment of the signal line.
In particular, in the electrical device connection mechanism according to claim 2, the flexible tube is covered with a gap outside the signal line connected to the connector, the refrigerant is sent from the base end side of the flexible tube to the gap, and the receptacle and Since the refrigerant is sent into the electric device from the communicating first and second insertion holes provided in the connector to cool the inside of the electric device, the signal line, the connector, the receptacle, and the refrigerant of the electric device to be connected are used. As a matter of course, it is possible to prevent the rise in temperature and the change in atmosphere by cooling, so that the connection and disconnection of the signal line covered with the flexible tube and the electric device can be easily performed, and the workability is improved. Further, deterioration of each device including the signal line, the connector, and the receptacle due to the thermal atmosphere can be prevented, and a long life can be obtained.
[0017]
Since the electric device is a temperature measuring probe, and the refrigerant flowing through the receptacle and the connector cools the terminal box of the temperature measuring probe, for example, mounting and removing the temperature measuring probe used in a blast furnace, an electric furnace, or the like. Becomes easier.
The compressed air is introduced from the proximal end side of the flexible tube in the connection mechanism of the electric device according to the third aspect, so that the temperature rise is suppressed over the entire length of the signal line, and the compressed air is used as the refrigerant. Therefore, there is no problem even if the compressed air leaks only in one-way traffic, and in the middle.
In the connection mechanism for an electric device according to claim 4 , the receptacle and the connector each have a female hole into which a male pin is fitted and the other has a female hole into which the male pin is fitted, so that electrical connection is stabilized and the connection portion is formed. Is uniform, so that a measurement error hardly occurs.
[0018]
In the temperature measuring device using the electrical device connection mechanism according to the fifth aspect , the connection cable includes a signal line for transmitting an electric signal from the temperature measurement probe and a flexible tube that covers the signal line with a gap. The first and second insertion holes communicating with the receptacle and the connector are provided, and the refrigerant from the connection port provided on the base end side of the flexible tube passes through the gap between the signal line and the flexible tube. Since the inside of the terminal box is cooled by passing through the first and second insertion holes of the receptacle and the connector and entering the terminal box, the signal line, the receptacle and the connector in the flexible tube are reliably cooled, and the terminal is further cooled. The box is also cooled, which prevents problems such as measurement errors and deterioration due to temperature rise. Connection with the passage to flow becomes very easy.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view around a terminal box of a temperature measuring device using a connection mechanism for electric equipment according to an embodiment of the present invention.
FIG. 2 is an overall view of the temperature measuring device.
FIG. 3 is a partial sectional view of the temperature measuring device.
FIGS. 4A to 4D are explanatory views of a receptacle and a connector.
FIGS. 5A and 5B are explanatory diagrams around electric wiring of a temperature measuring probe according to a conventional example.
[Explanation of symbols]
10: Temperature measuring device using connection mechanism of electric equipment, 11: Terminal box, 12: Temperature measuring probe, 13: Receptacle, 14: Connector, 15: Connection cable, 16: Flange, 17: Outer tube, 18: Medium Pipe, 19: inner pipe, 20, 21: wire, 22, 23: connection pin, 24: protrusion, 25: lid, 26: mounting bracket, 27: support member, 28-32: insertion hole, 33: stopper, 34: stop ring, 35: outlet, 36: mounting bracket, 37: support member, 38-42: insertion hole, 43, 44: connection pin, 45: stopper, 46: male screw, 47: female screw, 48: fixing cap , 50: signal line, 51: flexible tube, 52: fixing fitting, 53, 54: insertion hole, 55: connecting fitting, 56: T-shaped joint, 57, 58: connecting port, 59: seal fitting, 60: middle Connection port 61: profiled elbow, 62: male joint, 63: female joint, 64: air hose 65: Compressor, 66: Connector, 67: temperature measuring instrument

Claims (5)

A connection mechanism of an electric device that performs electric wiring through a connector corresponding to a receptacle provided in the electric device,
The receptacle and the connector are provided with first and second insertion holes that communicate a control medium into the electric device ,
A connection mechanism for an electric device, wherein a flexible tube is placed outside a signal line connected to the connector with a gap for flowing the control medium from the base end side into the electric device. 2. The connection mechanism for an electric device according to claim 1, wherein the control medium is a refrigerant, and the electric device is a temperature measuring probe . 3. The connection mechanism for an electric device according to claim 2 , wherein a connection port for introducing compressed air serving as the refrigerant into a gap between the flexible tube and the signal line is provided at a base end side of the flexible tube. Connection mechanism for electrical equipment. The connection mechanism for an electric device according to any one of claims 1 to 3 , wherein the receptacle and the connector each include a male pin in one of the receptacles and a female hole into which the male pin is fitted. A connection mechanism for electrical equipment. In a temperature measuring device having a terminal box at an upper portion, a temperature measuring probe provided with a receptacle in the terminal box, and a connection cable provided at one end with a connector connected to a receptacle of the terminal box,
The receptacle and the connector are provided with first and second insertion holes for communicating refrigerant to the terminal box, and outside the signal line connected to the connector, from the base end side into the temperature measuring probe. A temperature measuring device , wherein a flexible tube is covered with a gap for flowing a refrigerant .

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