CN216959691U - Thermocouple wire dotting device - Google Patents
Thermocouple wire dotting device Download PDFInfo
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- CN216959691U CN216959691U CN202123320822.2U CN202123320822U CN216959691U CN 216959691 U CN216959691 U CN 216959691U CN 202123320822 U CN202123320822 U CN 202123320822U CN 216959691 U CN216959691 U CN 216959691U
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- thermocouple wire
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Abstract
The application provides a thermocouple wire dotting device which comprises a power supply, a change-over switch, a chargeable element, a first connecting end and a second connecting end; the chargeable element is connected to the power supply through a first switch of the change-over switch and is connected to the first connecting end through a second switch of the change-over switch, and the chargeable element is connected to the power supply and is connected to the second connecting end; the first connecting end is used for connecting the carbon rod; the second connecting end is used for connecting a thermocouple wire; the first end of the power supply, the first switch, the chargeable element and the second end of the power supply form a charging loop, and when the first switch is closed, the power supply charges the chargeable element; when the second switch is closed, the rechargeable element discharges to sinter the thermocouple wire, so that the discharging circuit is isolated when the point is struck, and the use is safe and convenient.
Description
Technical Field
The disclosure relates to the technical field of thermocouple wire dotting, in particular to a thermocouple wire dotting device.
Background
The thermocouple wire dotting device is a tool for sintering thermocouple wires through rapid large-current discharge, and the working method is to connect the tail ends of two thermocouple wires together and sinter the tail ends of the thermocouples through welding joints to form spherical junctions.
As shown in fig. 1, a general thermocouple wire dotting device is powered by the following methods: the plug is connected with alternating current commercial power, the alternating current commercial power is converted into a low-voltage direct current power supply through a transformer T1, a rectifier bridge T1 carries out rectification, and then a filtering wave capacitor C1 carries out filtering to output direct current voltage VCC so as to directly provide current for a dotting terminal. However, in the above power supply method, since the dotting terminal and the power supply circuit are connected together, and the discharge circuit formed during dotting sintering is connected with the power supply circuit, if the dotting terminal is short-circuited or a component is failed to cause a short-circuit of the secondary side of the transformer, the transformer may be damaged, that is, the power supply circuit may be damaged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, the embodiment of the disclosure provides a thermocouple wire dotting device, which can isolate a discharge loop and a power supply loop formed during dotting sintering from each other, so that components of the power supply loop cannot be damaged even if a short circuit occurs during the dotting of the thermocouple wire, and the thermocouple wire dotting device is safe and convenient to use.
According to an embodiment of the present disclosure, there is provided a thermocouple wire dotting device including a power supply, a change-over switch, a chargeable element, a first connection terminal and a second connection terminal; the change-over switch comprises a first switch and a second switch; the first end of the chargeable element is connected to the first end of the power supply through the first switch of the change-over switch and is connected to the first connection end through the second switch of the change-over switch, and the second end of the chargeable element is connected to the second end of the power supply and is connected to the second connection end; the first connecting end is used for connecting the carbon rod; the second connecting end is used for connecting a thermocouple wire;
the first end of the power supply, the first switch, the chargeable element and the second end of the power supply form a charging loop, and when the first switch is closed, the power supply charges the chargeable element;
the first end of the chargeable element, the second switch, the first connection end, the carbon rod, the thermocouple wire and the second end of the chargeable element form a discharge loop, and when the second switch is closed, the chargeable element discharges to sinter the thermocouple wire.
Optionally, the switch is a relay; the relay comprises a coil and a contact switch; the contact switch includes a first switch that is turned off when the coil is energized and a second switch that is turned on when the coil is energized.
Optionally, the thermocouple wire dotting device further includes a third switch; the third switch and the coil of the relay are mutually connected in series and are connected in series with two output ends of the power supply, and one end of the third switch, which is connected with the power supply, is also connected to a second connecting end;
when the third switch is turned off, the coil of the relay loses power, the first switch of the relay is turned on, and the power supply charges the chargeable element;
when the third switch is closed, the coil of the relay is electrified, the second switch of the relay is closed, and the chargeable element discharges to sinter the thermocouple wire.
Optionally, the thermocouple wire dotting device further comprises a current limiting resistor; the third switch, the coil of the relay and the current limiting resistor are connected in series.
Optionally, the third switch is a key switch.
Optionally, a diode is connected in parallel to the two ends of the coil of the relay in the reverse direction.
Optionally, the power supply is a storage battery; the positive pole of battery is the first end of power supply, and the negative pole of battery is the second end of power supply.
Optionally, the energy storage capacity of the chargeable element corresponds to the electric energy required for dotting the thermocouple wire.
By applying the technical scheme of the embodiment of the disclosure, the change-over switch and the chargeable element are arranged in the thermocouple wire dotting device, the chargeable element is controlled to discharge through the change-over switch so as to dotte and sinter the thermocouple wire, and when dotting is finished, the power supply can be controlled to charge the chargeable element through the change-over switch, namely, the charge loop and the discharge loop are isolated through the change-over switch, so that the power supply can not be damaged even if a short circuit phenomenon occurs when the thermocouple wire dotting device is dotted, and the use is safe and convenient.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
For a better understanding and practice, the present disclosure is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a prior art thermocouple wire dotting device;
FIG. 2 is a schematic block diagram of a thermocouple wire dotting device according to an embodiment of the present disclosure;
fig. 3 is a circuit connection diagram of a thermocouple wire dotting device according to an embodiment of the disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if/if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In the prior thermocouple wire dotting device, because the dotting terminal is connected with the power supply circuit, a discharge circuit formed during dotting sintering is connected with the power supply circuit, and if the dotting terminal is short-circuited or a component is failed to cause the secondary short circuit of the transformer, the transformer has damage risk, namely the power supply circuit can be damaged.
In order to solve the above problem, the embodiment of the present disclosure provides a thermocouple wire dotting device, which can isolate a discharge loop and a power supply loop formed during dotting sintering from each other, so that components of the power supply loop cannot be damaged even if a short circuit occurs during the dotting of the thermocouple wire, and the thermocouple wire dotting device is safe and convenient to use.
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
Referring to fig. 2, fig. 2 is a schematic block diagram of a thermocouple wire dotting device according to an embodiment of the disclosure.
The thermocouple wire dotting device comprises a power supply 10, a change-over switch 20, a chargeable element 30, a first connecting end 40 and a second connecting end 50; the changeover switch 20 includes a first switch 21 and a second switch 22; the first end of the chargeable element 20 is connected to the first end of the power supply 10 through the first switch 21 of the switch 20 and connected to the first connection end 50 through the second switch 22 of the switch 20, and the second end of the chargeable element 30 is connected to the second end of the power supply 10 and connected to the second connection end 50; the first connecting end 40 is used for connecting a carbon rod; the second connection terminal 50 is used for connecting a thermocouple wire.
A first end of the power supply 10, the first switch 21, the chargeable element 30 and a second end of the power supply 10 form a charging loop, and when the first switch 21 is closed, the power supply 10 charges the chargeable element 30; the first end of the chargeable element 30, the second switch 22, the first connection end 40, the carbon rod, the thermocouple wire and the second end of the chargeable element 30 form a discharge loop, and when the second switch 21 is closed, the chargeable element 30 discharges to sinter the thermocouple wire.
When the thermocouple wires are dotted and sintered, an operator can connect the first connecting end 40 with the carbon rod and connect the second connecting end 50 with the conductive metal tweezers, the operator uses the metal tweezers to clamp the two pieces of thermocouple wires to be sintered together and touches the carbon rod with the thermocouple wires, and the rechargeable element 30 can instantly discharge to form a large current, so that the thermocouple wires are sintered into a sphere. Because the chargeable element 30 has limited energy storage, the discharge capacity is limited, and the discharge cannot be sustained, so that the dotting sintering effect is ensured, and the safety of operators is ensured.
In the embodiment, the change-over switch and the chargeable element are arranged in the thermocouple wire dotting device, the chargeable element is controlled to discharge through the change-over switch so as to dotte and sinter the thermocouple wire, when dotting is finished, the power supply can be controlled to charge the chargeable element through the change-over switch, namely, the charge loop and the discharge loop are isolated through the change-over switch, so that the power supply cannot be damaged even if a short circuit phenomenon occurs when the thermocouple wire dotting device is dotted, and the use is safe and convenient.
Referring to fig. 3, fig. 3 is a circuit connection diagram of a thermocouple wire dotting device according to an embodiment of the disclosure.
The power supply 10 is used for supplying a dc power to charge the chargeable element 30. The positive pole of the power supply 10 is a first end, the positive pole is connected to the positive pole of the chargeable element 30 through the first switch 21 of the switch 20, the negative pole of the power supply 10 is a second end, and the negative pole is connected to the negative pole of the chargeable element 30.
In an alternative embodiment, the power supply 10 may be a 12V low voltage lead acid battery in order to make the thermocouple wire dotting device independent of the ac mains supply. The positive pole of the storage battery is the first end of the power supply 10 and is used for outputting a +12V direct current power supply, and the negative pole of the storage battery is the second end of the power supply 10 and is used for forming an electrifying loop with the +12V direct current power supply. When the first switch 21 of the relay 20 is closed, the accumulator charges the chargeable element 30 to reserve electric energy for firing the thermocouple wires. The rechargeable battery is charged through the storage battery, the use convenience of the thermocouple wire dotting device is improved, dotting and sintering operations can be performed at any time and any place, the use is convenient, an alternating current-to-direct current circuit is omitted, and the structure of the dotting device is further simplified.
In other embodiments, the power supply 10 may be other power supply circuits or batteries.
The change-over switch 20 comprises a first switch 21 and a second switch 22, which can isolate the discharging loop from the charging loop, so as to ensure the safety of the dotting sintering operation, and avoid the damage to the power supply due to the large current phenomena such as short circuit and the like during the dotting sintering operation. The first switch 21 may be a normally closed switch, and the second switch 22 may be a normally open switch.
In this embodiment, the switch 20 is a relay RL 21; relay RL21 includes a coil and a contact switch; the contact switch comprises a first switch 21 and a second switch 22, wherein the first switch 21 is turned off when the coil is electrified, and the second switch 22 is turned on when the coil is electrified, so that the turn-off or turn-on of the change-over switch can be controlled by controlling the on-off of the coil of the relay RL21, further the charging and discharging are controlled, and the dotting sintering of the thermocouple wire through the discharging of the chargeable element is facilitated.
In an alternative embodiment, in order to protect the relay RL21, a diode D21 is also connected in parallel in reverse at two ends of the coil of the relay RL21, and when the coil of the relay RL21 is de-energized, the diode D21 can release residual electricity left on the coil of the relay RL21, so that the relay coil is no longer electrified.
The chargeable element 30 is used to store electric energy and can discharge a large current when the thermocouple wire is dotted and sintered so that the thermocouple wire is rapidly sintered. The energy storage capacity of the chargeable element 30 corresponds to the electrical energy required for dotting the thermocouple wire, or the energy storage capacity of the chargeable element 30 is greater than the electrical energy required for dotting the thermocouple wire. Optionally, the chargeable element 30 may be a capacitor bank formed by connecting a plurality of electrolytic capacitors in parallel, where the capacity of each electrolytic capacitor is 1000uF, and the withstand voltage is 25V; the number of the capacitor sets may be 10, or other numbers, as long as the power consumption of the thermocouple wire in dotting sintering can be satisfied, and the number is not limited to a specific number.
Optionally, in order to better control the dotting sintering operation, the thermocouple wire dotting device is further provided with a third switch S21; the third switch S21 and the coil of the relay RL21 are connected in series with each other and with two output terminals of the power supply 10, and one end of the third switch S21 connected with the power supply 10 is also connected to the second connection terminal 50.
When the third switch S21 is turned off, the coil of the relay RL21 loses power, the first switch of the relay RL21 is closed, and the power supply 10 charges the chargeable element 30 to store energy.
When the third switch S21 is closed, the coil of the relay RL21 is energized, the second switch of the relay RL21 is closed, and the rechargeable element 30 discharges to sinter the thermocouple wires.
The third switch S21 may be a push button switch, or other type of switch. By arranging the third switch S21 in the thermocouple wire dotting device, the operating personnel can conveniently control the operating time in due time, and the use is more convenient.
In an optional embodiment, the thermocouple wire dotting device further comprises a current limiting resistor R21; the third switch S21, the current-limiting resistor R21 and the coil of the relay RL21 are sequentially connected in series and are connected between the positive electrode and the negative electrode of the storage battery in series, so that the current-limiting protection effect is realized.
By applying the technical scheme of the embodiment of the disclosure, the change-over switch and the chargeable element are arranged in the thermocouple wire dotting device, the chargeable element is controlled to discharge through the change-over switch so as to dotte and sinter the thermocouple wire, and when dotting is finished, the power supply can be controlled to charge the chargeable element through the change-over switch, namely, the charge loop and the discharge loop are isolated through the change-over switch, so that the power supply can not be damaged even if a short circuit phenomenon occurs when the thermocouple wire dotting device is dotted, and the use is safe and convenient.
The above-mentioned embodiments only express several embodiments of the present disclosure, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the concept of the present disclosure, and these changes and modifications are all within the scope of the present disclosure.
Claims (8)
1. A thermocouple wire dotting device is characterized by comprising a power supply, a change-over switch, a chargeable element, a first connecting end and a second connecting end; the change-over switch comprises a first switch and a second switch;
the first end of the chargeable element is connected to the first end of the power supply through the first switch of the change-over switch and connected to the first connection end through the second switch of the change-over switch, and the second end of the chargeable element is connected to the second end of the power supply and connected to the second connection end;
the first connecting end is used for connecting a carbon rod;
the second connecting end is used for connecting a thermocouple wire;
the first end of the power supply, the first switch, the chargeable element and the second end of the power supply form a charging loop, and when the first switch is closed, the power supply charges the chargeable element;
the first end of the chargeable element, the second switch, the first connection end, the carbon rod, the thermocouple wire and the second end of the chargeable element form a discharge loop, and when the second switch is closed, the chargeable element discharges to sinter the thermocouple wire.
2. The thermocouple wire dotting device according to claim 1, wherein the changeover switch is a relay; the relay comprises a coil and a contact switch; the contact switch includes the first switch that is turned off when the coil is energized, and a second switch that is turned on when the coil is energized.
3. The thermocouple wire dotting device according to claim 2, further comprising a third switch; the third switch and the coil of the relay are connected in series and are connected in series with two ends of the power supply, and one end of the third switch, which is connected with the power supply, is also connected to the second connecting end;
when the third switch is turned off, the coil of the relay loses power, the first switch of the relay is turned on, and the power supply source charges the chargeable element;
when the third switch is closed, the coil of the relay is electrified, the second switch of the relay is closed, and the chargeable element discharges to sinter the thermocouple wire.
4. The thermocouple wire dotting device according to claim 3, further comprising a current limiting resistor; the third switch, the coil of the relay and the current limiting resistor are connected in series.
5. The thermocouple wire dotting device according to claim 4, wherein the third switch is a push button switch.
6. The thermocouple wire dotting device according to claim 2, wherein a diode is connected in parallel in reverse to both ends of the coil of the relay.
7. The thermocouple wire dotting device according to claim 1, wherein the power supply is a battery; the positive pole of the storage battery is the first end of the power supply, and the negative pole of the storage battery is the second end of the power supply.
8. The thermocouple wire dotting device according to claim 1, wherein the energy storage capacity of the chargeable element corresponds to the electrical energy required for thermocouple wire dotting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123320822.2U CN216959691U (en) | 2021-12-27 | 2021-12-27 | Thermocouple wire dotting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123320822.2U CN216959691U (en) | 2021-12-27 | 2021-12-27 | Thermocouple wire dotting device |
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| Publication Number | Publication Date |
|---|---|
| CN216959691U true CN216959691U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123320822.2U Active CN216959691U (en) | 2021-12-27 | 2021-12-27 | Thermocouple wire dotting device |
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| CN (1) | CN216959691U (en) |
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- 2021-12-27 CN CN202123320822.2U patent/CN216959691U/en active Active
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