Temperature measurement loop multifunctional conversion device and use method

Abstract

The invention belongs to the technical field of oil-immersed transformer temperature measurement, and discloses a temperature measurement loop multifunctional conversion device and a use method, and the device comprises a knob switch which is provided with a transmission shaft, and the transmission shaft is provided with a projection; the first switch is connected with a third element; the other end of the third element is connected with the second contact; the second switch is connected with the third switch; a cam is arranged on the protrusion and connected with a seventh switch, and the third contact is connected with a seventh contact and the first element. According to the invention, the technical problem that normal operation of other equipment can be influenced when a current winding temperature controller needs to be disconnected from a loop for maintenance can be solved, and the technical problem that the loop equipment can be cut off only after the transformer is powered off due to the characteristic that the current transformer cannot be in open-circuit operation can be solved at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature measurement of oil-immersed transformers, and in particular relates to a multifunctional conversion device for a temperature measurement circuit and a use method thereof. Background Art

[0002] The oil-immersed transformer directly monitors the oil surface temperature of the transformer through the temperature sensor installed on the top cover of the oil tank, while the winding temperature is monitored by monitoring the oil surface temperature and then superimposing the temperature rise value simulated by the winding current. Figure 1 As shown, at present, the winding current simulation value is input into the winding temperature controller through the secondary current induced by the current transformer, and its circuit is also connected in series with other devices such as the second element and the current relay. When the winding temperature controller needs to be disconnected from the circuit for maintenance, it will affect the normal operation of other equipment. At the same time, due to the characteristic that the current transformer cannot be operated in an open circuit, the circuit equipment can only be removed after the transformer is powered off. This has caused inconvenience to the daily maintenance of the equipment.

[0003] The Chinese patent publication number is CN106159481A, and the name is a patent application for a connector between an oil-immersed transformer temperature controller and a field cable outlet. The connector includes a rectangular terminal block, on which are provided 4 thermal resistor output contacts, 8 temperature controller action contacts, 4 working voltage input and standard current output contacts, and 2 current transformer input contacts; the thermal resistor output contacts are used to connect two-wire, three-wire or four-wire thermal resistors; the temperature controller action contacts are used to connect the four pairs of action contact outputs of the temperature controller; the working voltage input and standard current output contacts are used to connect the working voltage input and standard current output of the temperature transmitter of the temperature controller; the current transformer input contacts are used to connect the current transformer that reacts to the additional temperature rise of the winding. This patent application cannot solve the technical problem that the current transformer cannot operate in an open circuit, resulting in the circuit equipment being cut off only after the transformer is powered off. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a multifunctional conversion device of a temperature measurement circuit and a method of use. A cam is arranged on the transmission shaft, and during the gear switching process, the rotation of the cam triggers the switch action linked thereto, so that the circuit can remain closed and the influence of the open circuit on the components can be avoided.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In the first aspect, the present invention provides a multifunctional conversion device for a temperature measurement circuit, comprising: a knob switch, the knob switch having a P1 gear and a P3 gear, the P1 gear comprising a first switch and a first contact corresponding to it, a second switch and a second contact corresponding to it, a third switch and a third contact corresponding to it; the P3 gear comprising a sixth switch and a sixth contact corresponding to it; the knob switch having a transmission shaft, a protrusion being provided on the transmission shaft; the first switch being connected to a third element; the other end of the third element being connected to the second contact; the second switch being connected to the third switch; a cam being provided on the protrusion, the cam being connected to a seventh switch, the third contact being respectively connected to the seventh contact and the first element; the seventh contact corresponding to the seventh switch, the other end of the first element being respectively connected to the first contact, the sixth contact and the seventh switch; the sixth switch being connected to the fifth switch, the fifth switch being connected to the third contact.

[0007] Optionally, the knob switch also includes a p2 gear, and the p2 gear includes a fourth switch and its corresponding fourth contact and a fifth switch and its corresponding fifth contact; the first element is connected to the fourth contact; the fourth switch is connected to the third element; and the second contact is connected to the fifth contact.

[0008] Optionally, the fourth switch is arranged between the first switch and the sixth switch.

[0009] Optionally, the second switch is connected to a second element, and the other end of the second element is connected to a third switch.

[0010] Optionally, the first element is a current transformer, the second element is a winding temperature controller, and the third element is a current relay.

[0011] Optionally, an ammeter is connected in series with the first element.

[0012] Optionally, the third element is connected to other electrical equipment.

[0013] Optionally, the end of the knob switch has a handle.

[0014] Optionally, the third switch is arranged at the end of the transmission shaft.

[0015] In a second aspect, the present invention provides a method for using a temperature measurement loop multifunctional conversion device, comprising the following steps:

[0016] The p1 gear is closed by the knob switch, the first switch and the first contact are closed, the second switch and the second contact are closed, the third switch and the third contact are closed, the sixth switch and the sixth contact are disconnected, and the seventh switch and the seventh contact are disconnected; at this time, the first element, the third element and the fourth element form a series circuit;

[0017] When the knob switch is turned to change the gear position, the rotation of the protrusion drives the cam to move, so that the seventh switch is closed; at this time, the first element maintains a closed loop;

[0018] The P3 gear is closed by the knob switch, the first switch is disconnected from the first contact, the second switch is disconnected from the second contact, the third switch is disconnected from the third contact, the sixth switch is closed from the sixth contact, and the seventh switch is disconnected from the seventh contact; at this time, the first element forms a series circuit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A multifunctional conversion device for a temperature measurement circuit and a method of using the same are disclosed. The present invention provides a cam on the transmission shaft. During the gear switching process, the cam rotates to trigger the action of the switch linked thereto, so that the circuit can remain closed. When the gear is switched, the cam device releases the switch linked thereto, so that the working circuit of the corresponding gear remains normal, thereby avoiding the influence of the open circuit on the components. The present invention can solve the current technical problem that when the winding temperature controller needs to be disconnected from the circuit for maintenance, it will affect the normal operation of other equipment. At the same time, it solves the technical problem that the circuit equipment can only be cut off after the transformer is powered off due to the characteristic that the current transformer cannot operate in an open circuit.

[0021] Furthermore, the present invention is provided with three gear positions, namely, p1, p2 and p3, which can meet different connection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of a temperature measurement circuit of an oil-immersed transformer in the prior art;

[0024] Figure 2 This is a schematic diagram of the P1 gear circuit of Embodiment 2 of the present invention;

[0025] Figure 3 This is a schematic diagram of the P2 gear circuit of Example 2 of the present invention;

[0026] Figure 4 This is a schematic diagram of the P3 gear circuit of Example 2 of the present invention;

[0027] Figure 5 It is a schematic diagram of the linkage switching process of each gear in embodiment 2 of the present invention.

[0028] Among them, 100, multifunctional conversion device for temperature measurement circuit; 101, first component; 102, ammeter; 103, second component; 104, third component; 105, other electrical equipment; 1, first switch; 2, first contact; 3, second switch; 4, second contact; 5, third switch; 6, third contact; 7, fourth switch; 8, fourth contact; 9, fifth switch; 10, fifth contact; 11, sixth switch; 12, sixth contact; 13, seventh contact; 14, seventh switch; 200, cam; 20, knob switch; 201, transmission shaft; 202, protrusion. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The present invention is described in detail below with reference to the accompanying drawings.

[0033] A multifunctional conversion device for a temperature measurement circuit of the present invention comprises: a knob switch 20, the knob switch 20 having a p1 gear and a p3 gear, the p1 gear comprising a first switch 1 and a first contact 2 corresponding thereto, a second switch 3 and a second contact 4 corresponding thereto, a third switch 5 and a third contact 6 corresponding thereto; the p3 gear comprising a sixth switch 11 and a sixth contact 12 corresponding thereto; the knob switch 20 has a transmission shaft 201, a protrusion 202 is arranged on the transmission shaft 201; the first switch 1 is connected to a third element 104; the third element The other end of 104 is connected to the second contact 4; the second switch 3 is connected to the third switch 5; a cam 200 is provided on the protrusion 202, the cam 200 is connected to the seventh switch 14, and the third contact 6 is respectively connected to the seventh contact 13 and the first element 101; the seventh contact 13 corresponds to the seventh switch 14, and the other end of the first element 101 is respectively connected to the first contact 2, the sixth contact 12 and the seventh switch 14; the sixth switch 11 is connected to the fifth switch 9, and the fifth switch 9 is connected to the third contact 6.

[0034] The present invention can drive the cam 200 to move through the rotation of the protrusion 202 to close the seventh switch 14 when the knob switch 20 is turned to change the gear position, thereby keeping the first element 101 in a closed loop.

[0035] Example 1

[0036] like Figure 1 As shown, a temperature measurement circuit multifunctional conversion device of the present invention includes: a temperature measurement circuit multifunctional conversion device 100 and a first element 101 , a second element 103 and a third element 104 .

[0037] The temperature measurement circuit multifunctional conversion device 100 includes a knob switch 20, and the knob switch 20 has p1 gear, p2 gear and p3 gear. The p1 gear includes a first switch 1 and a first contact 2 corresponding thereto, a second switch 3 and a second contact 4 corresponding thereto, a third switch 5 and a third contact 6 corresponding thereto; the p2 gear includes a fourth switch 7 and a fourth contact 8 corresponding thereto, a fifth switch 9 and a fifth contact 10 corresponding thereto; and the p3 gear includes a sixth switch 11 and a sixth contact 12 corresponding thereto.

[0038] The knob switch 20 has a transmission shaft 201, and the p1 gear, p2 gear and p3 gear are all controlled by the transmission shaft 201. The transmission shaft 201 is provided with a protrusion 202; the first switch 1 is connected to the fourth switch 7 and the third element 104; the other end of the third element 104 is connected to the second contact 4 and the fifth contact 10; the second switch 3 is connected to the second element 103, and the other end of the second element 103 is connected to the third switch 5; the protrusion 202 is provided with a cam 200, the cam 200 is connected to the seventh switch 14, and the third contact 6 is respectively connected to the seventh contact 13 and the first element 101; the seventh contact 13 corresponds to the seventh switch 14, and the other end of the first element 101 is respectively connected to the first contact 2, the fourth contact 8, the sixth contact 12 and the seventh switch 14; the sixth switch 11 is connected to the fifth switch 9, and the fifth switch 9 is connected to the third contact 6.

[0039] Optionally, the first element 101 is a current transformer, the second element 103 is a winding temperature controller, and the third element 104 is a current relay. Further, the third element 104 is connected to other electrical equipment 105.

[0040] Optionally, the first element 101 is connected in series with an ammeter 102 .

[0041] Example 2

[0042] Combine the following Figures 2 to 5 The specific implementation modes of the present invention are further described.

[0043] like Figure 2 As shown, the device is linked to switch to P1 gear, all switches in the P1 gear position are closed, and all switches in other gear positions are disconnected. When in this gear, the first element 101, the ammeter 102, the third element 104, and the fourth element 104 in the circuit form a series circuit. At this time, the ammeter 102, the third element 104, and the fourth element 104 can normally collect the transformer winding current signal through the first element 101; the first switch 1 is closed with the first contact 2, the second switch 3 is closed with the second contact 4, the third switch 5 is closed with the third contact 6, the fourth switch 7 is disconnected with the fourth contact 8, the fifth switch 9 is disconnected with the fifth contact 10, the sixth switch 11 is disconnected with the sixth contact 12, and the seventh switch 14 is disconnected with the seventh contact 13.

[0044] like Figure 3As shown, the device is linked to the P2 gear, the switches in the P2 gear position are all closed, and the switches in the other gear positions are all disconnected. When in this gear, the first element 101, the ammeter 102, and the fourth element 104 in the circuit form a series circuit. At this time, the ammeter 102 and the fourth element 104 can normally collect the transformer winding current signal through the first element 101. The third element 104 loses the temperature rise value simulated by the winding current, and can be used as an oil level thermostat, or it can be removed for maintenance and replacement, and it does not affect the normal operation of other equipment that needs to collect the secondary current of the winding. The first switch 1 is disconnected from the first contact 2, the second switch 3 is disconnected from the second contact 4, the third switch 5 is disconnected from the third contact 6, the fourth switch 7 is closed with the fourth contact 8, the fifth switch 9 is closed with the fifth contact 10, the sixth switch 11 is disconnected from the sixth contact 12, and the seventh switch 14 is disconnected from the seventh contact 13.

[0045] like Figure 4 As shown, the device is linked to the P3 gear, and all switches in the P3 gear position are closed, and all switches in other gear positions are disconnected. When in this gear position, the first element 101 and the ammeter 102 in the circuit form a series circuit. At this time, the ammeter 102 can normally collect the transformer winding current signal through the first element 101. When the transformer is in operation, the functional devices on the circuit have been removed, and the first element 101 is not in open circuit operation. The first switch 1 is disconnected from the first contact 2, the second switch 3 is disconnected from the second contact 4, the third switch 5 is disconnected from the third contact 6, the fourth switch 7 is disconnected from the fourth contact 8, the fifth switch 9 is disconnected from the fifth contact 10, the sixth switch 11 is closed from the sixth contact 12, and the seventh switch 14 is disconnected from the seventh contact 13.

[0046] like Figure 5 As shown, during the coordinated switching of the gears P1, P2, and P3, in order to avoid the influence of the open circuit on the first element 101, a cam 200 is provided on the transmission shaft 201 of the switching device. During the gear switching process, the rotation of the cam 200 triggers the action of the switch linked thereto, so that the circuit of the first element 101 remains closed. When the gear switching is completed, the switch linked thereto is released through the cam 200, so that the working circuit of the corresponding gear remains normal.

[0047] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A multifunctional conversion device for a temperature measurement circuit, characterized in that: include: A rotary switch (20), the rotary switch (20) having a p1 gear and a p3 gear, the p1 gear comprising a first switch (1) and a first contact (2) corresponding thereto, a second switch (3) and a second contact (4) corresponding thereto, a third switch (5) and a third contact (6) corresponding thereto; the p3 gear comprising a sixth switch (11) and a sixth contact (12) corresponding thereto; the rotary switch (20) having a transmission shaft (201), the transmission shaft (201) being provided with a protrusion (202); the first switch (1) being connected to a third element (104); the other end of the third element (104) being in contact with the second contact (4 ); the second switch (3) is connected to the third switch (5); the protrusion (202) is provided with a cam (200), the cam (200) is connected to the seventh switch (14), the third contact (6) is respectively connected to the seventh contact (13) and the first element (101); the seventh contact (13) corresponds to the seventh switch (14), the other end of the first element (101) is respectively connected to the first contact (2), the sixth contact (12) and the seventh switch (14); the sixth switch (11) is connected to the fifth switch (9), and the fifth switch (9) is connected to the third contact (6).

2. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The rotary switch (20) further comprises a P2 gear, wherein the P2 gear comprises a fourth switch (7) and a corresponding fourth contact (8) and a fifth switch (9) and a corresponding fifth contact (10); the first element (101) is connected to the fourth contact (8); the fourth switch (7) is connected to the third element (104); and the second contact (4) is connected to the fifth contact (10).

3. A temperature measurement circuit multifunctional conversion device according to claim 2, characterized in that: The fourth switch (7) is arranged between the first switch (1) and the sixth switch (11).

4. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The second switch (3) is connected to a second element (103), and the other end of the second element (103) is connected to a third switch (5).

5. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The first element (101) is a current transformer, the second element (103) is a winding temperature controller, and the third element (104) is a current relay.

6. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The first element (101) is connected in series with an ammeter (102).

7. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The third element (104) is connected to other electrical equipment (105).

8. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The end of the knob switch (20) is provided with a handle.

9. A temperature measurement circuit multifunctional conversion device according to claim 1, characterized in that: The third switch (5) is arranged at the end of the transmission shaft (201).

10. A method for using a temperature measurement circuit multifunctional conversion device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The knob switch (20) is used to close the p1 gear, the first switch (1) and the first contact (2) are closed, the second switch (3) and the second contact (4) are closed, the third switch (5) and the third contact (6) are closed, the sixth switch (11) and the sixth contact (12) are disconnected, and the seventh switch (14) and the seventh contact (13) are disconnected; at this time, the first element (101), the third element (103) and the fourth element (104) form a series circuit; When the knob switch (20) is turned to change the gear position, the cam (200) is driven to move by the rotation of the protrusion (202), so that the seventh switch (14) is closed; at this time, the first element (101) maintains a closed loop; The knob switch (20) is used to close the P3 gear, the first switch (1) is disconnected from the first contact (2), the second switch (3) is disconnected from the second contact (4), the third switch (5) is disconnected from the third contact (6), the sixth switch (11) is closed from the sixth contact (12), and the seventh switch (14) is disconnected from the seventh contact (13); at this time, the first element (101) forms a series circuit.

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