JPS595948Y2 - Structure of coil lead wire of thermoelectric magnet - Google Patents

Description

[Detailed description of the invention] In this invention, when the pilot burner of the gas combustion device goes out, the adsorption force of the thermoelectric magnet connected to the starter thermoelectric lamp disappears, and the valve body of the safety valve returns to its original position, thereby allowing the burner to The present invention relates to a thermoelectric safety valve that shuts off gas supply, and in particular to an assembly structure of a coil lead wire lead-out portion of a thermoelectric magnet.

Conventionally, in this type of safety valve, the coil lead of the thermoelectric magnet has a structure in which the lead wire is drawn out directly, and a connecting probe connected to the thermocouple is attached with a screw and connected to a contact column connected to the coil lead wire. There is a structure in which the probe is brought into pressure contact.

Due to these differences between the two drawer structures, the construction parts, work processes, jigs, etc. of both structures are all different, and the prices are also high.

In order to solve these conventional problems, the present invention provides an assembly structure for a coil lead wire draw-out section that allows the construction parts of both draw-out methods to be made as common as possible.

1 and 2 are center sectional views of a safety valve incorporating a thermoelectric magnet according to the present invention, in which FIG. 1 shows a direct coil lead-out method, and FIG. 2 shows a connecting probe method.

In Fig. 1, a through hole JL2 is drilled in the center of the terminal 1, and an insulating plate 4 is brought into contact with the inner end face 3 of this hole 2, and an insulating plate 6 is brought into contact with the outer end face 5, respectively. A packing 7 such as an O-ring is fitted around the circumference.

A hole is made in the center of the insulating plates 4 and 6, and an eyelet-shaped contact column 9 is inserted from the inside into the center hole of both insulating plates, the O-ring 7, and the hole of the L-shaped terminal 8 stacked on the insulating plate 6. Then, the tip 10 is crimped.

Therefore, the insulating plates 4 and 6 and the O-ring 7 are clamped between the caulking part 10 and the inner collar part 11, and the terminal 1
and the contact column 9 are electrically insulated and hermetically sealed.

Inside the terminal 1, an electromagnetic core 12 is secured by caulking or the like at a distance so as not to contact the contact column 9, and a protective can 13 is press-fitted and secured.

Then, the lead wire 15 of the excitation coil 14 is inserted through the hole in the attachment part 12' of the iron core 12 and the through hole in the center of the contact column 9, and led out, and the crimped part 10 and the lead wire tip are soldered and sealed. .

A conductive wire 16 is soldered to the L-shaped terminal 8 and connected to a thermocouple 17, while the other end of the coil 14 is welded to the terminal 1 and grounded.

A connecting rod 18 is attached to the protective cover 13 in the same manner as in the prior art, and an iron piece 19 is supported at one end of the connecting rod 18 and a valve body 20 is supported at the other end, so that the valve body 20 is pressed against the valve seat 21.

Then, a sealing metal link 27 is placed between the terminal 1 and the main body 26, and is tightened and fixed with a nut 28.

For the ignition operation, push the push rod 22 to push the valve body 20 away from the valve seat 21, and after igniting the pilot burner 23 with the iron piece 19 pressed against the iron core 12,
If the push rod 22 is kept pressed for a while, the thermocouple 17 is heated and the iron core 12 is excited by the hot current, which attracts the iron piece 19 and holds the valve body 20 in an open state.

When the pilot burner 23 goes out, the thermocouple 17 cools down and the thermoelectromotive force also disappears, so the attraction force of the electromagnet disappears, and the valve body 20 automatically returns to its original position and closes the valve.

FIG. 2 shows a connection probe 24 for connecting coil lead wires.

To draw out the coil lead wire of the electromagnet, the contact column 9' is inserted from the outside into the center hole of the insulating plates 4 and 6 and the O-ring 7, and a reinforcing metal ring is attached to the inner insulating plate 4. The only difference from FIG. 1 is that 25 are overlapped and the inner end 10' is crimped, and the rest is exactly the same as FIG. 1.

The electromagnet section can also be attached to the main body 26 by sandwiching a sealing metal ring 27 between the inner wall of the main body and the terminal 1.
This is done by tightening and fixing with nuts 28.

The end of the coil lead wire 15 ends at a portion soldered to the collar portion 11' of the contact column 9', and connection to the thermocouple 17 is made via a connection probe 24.

The connection probe 24 includes a contact 30 to which an insulated wire 29 is soldered and connected, and a push 32 to which a bare copper wire 31 is welded. When the connection screw 33 is screwed into the female thread provided on the nut 28 and tightened, the push 32 presses the contact 30 through the insulating ring 34 onto the collar 11' of the contact column.

Therefore, the coil lead wire 15 is a contact } 30
and is connected to the thermocouple 17 via an insulated wire 29, and the other end of the coil 14 is welded to the terminal 1.
It is connected to the thermocouple 17 through the mounting nut 28, connection nut 33, push 32 and bare copper wire 31.

As described above, according to the present invention, both the direct lead-out method shown in FIG. 1 and the connection probe method shown in FIG. It has a structure in which the tips 10 and 10' are crimped, and according to this structure, the terminal 1, the insulating plates 4 and 6 that contact the inner and outer surfaces of the terminal, and the O-ring 7 can share exactly the same parts.

Contact columns 9 and 9' also have somewhat different dimensions, but they all have a nearly eyelet shape and have the same feature of crimping at the tips, so the crimping jigs and tools can be shared, and the assembly process is almost the same. do not have.

Therefore, the completely different parts are the L-shaped terminal 8 and the metal ring 2.
5 and most of them are the same, so the product price is reduced along with rationalization of assembly work.

In the illustrated example, the contact columns 9 and 9' have different dimensions, but it is also possible to share the same column.

[Brief explanation of drawings]

1 and 2 are center sectional views of a safety valve incorporating a thermoelectric magnet according to the present invention, in which FIG. 1 shows a direct coil lead-out method, and FIG. 2 shows a connecting probe method. In the figure, 1 is a terminal, 2 is a through hole, 3 and 5 are end faces, 4 and 6 are insulating plates, 7 is an OIJ ring, 8 is an L-shaped terminal,
9, 9' are contact columns, 10, 10' are caulking parts, 11, 11' flap parts, 12 are iron cores, 13 are protective cans, 14 are excitation coils, 15 are coil lead wires, 17 are thermocouples, 24 is a connection probe, and 25 is a metal ring.

Claims (1)

[Scope of utility model registration request] A through hole is drilled in the terminal to which the electromagnet core and protective cover will be attached, and an insulating plate is abutted on both the inner and outer end surfaces of this through hole, and a ring-shaped insulating packing is inserted into the through hole, and the hole of both the inner and outer insulating plates and the annular insulation are inserted. This is an assembly structure of a thermoelectric magnet in which a contact column is inserted into a hole in a magnetic packing, and the contact column is used to clamp the inner and outer insulating plates.