Oil level gauge alarm system for transformer and transformer

Abstract

The utility model provides an oil level gauge alarm system for a transformer and the transformer, and aims to solve the problem that the maloperation probability is extremely high due to the fact that the liquid level in an oil pillow fluctuates sometimes in the prior art. The system comprises a connecting rod, a floating ball, an oil conservator main body container, a high liquid level sensor S1, a low liquid level sensor S2, a high liquid level reed switch K1, a low liquid level reed switch K2, an oil level meter dial plate, a controllable switch K1 ', a controllable switch K2', a controller and a state indicator light LED. The oil conservator body container is provided with a rotating shaft, the position of the rotating shaft is fixed, and the connecting rod is installed on the rotating shaft and rotates with the rotating shaft as the rotating center. The connecting rod is driven by the floating ball to rotate, so that the magnet triggers the high-liquid-level reed switch K1 or the low-liquid-level reed switch K2, and oil level monitoring is achieved. The controller controls on-off of the controllable switch K1'and the controllable switch K2 'according to signals of the sensor, interlocking protection is formed, and conflicts of high and low liquid level signals are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to a transformer oil level gauge alarm system and transformer. BACKGROUND

[0002] In the transformer oil pillow inner floating ball liquid level gauge, the height of oil level is judged through the floating ball liquid level gauge, when the oil level is high or low, the equipment of transformer body is damaged, when the oil level is higher or lower than the normal value, the alarm is triggered, so that the transformer is protected from damage.

[0003] In the existing but current transformer oil pillow inner floating ball liquid level gauge, only one switch exists in the circuit of high liquid level sensor and low liquid level sensor, sometimes the liquid surface in the oil pillow fluctuates, which leads to a great probability of malfunction, and hides the hidden danger for the stable operation of equipment. UTILITY MODEL CONTENTS

[0004] The utility model discloses to solve the problem that the liquid surface in the oil pillow sometimes fluctuates, which leads to a great probability of malfunction, and hides the hidden danger for the stable operation of equipment, and provides a transformer oil level gauge alarm system and transformer.

[0005] The utility model adopts the technical scheme that:

[0006] A transformer oil level gauge alarm system, including connecting rod, floating ball, oil pillow main part container, high liquid level sensor S1, low liquid level sensor S2, high liquid level reed switch K1, low liquid level reed switch K2 and oil level gauge dial,

[0007] Among them, high liquid level reed switch K1 and low liquid level reed switch K2 are installed in different positions in the oil level gauge dial, the floating ball is installed at the front end of the connecting rod, and the magnet is installed at the end of the connecting rod in the oil level gauge dial;

[0008] The oil pillow main part container is installed with a rotating shaft, the position of the rotating shaft is fixed, the connecting rod is installed on the rotating shaft, and the connecting rod rotates around the rotating shaft as the rotation center;

[0009] One end of the high liquid level reed switch K1 is connected with the external power supply PS, and the other end of the high liquid level reed switch K1 is connected with the ground through the high liquid level sensor S1;

[0010] One end of the low liquid level reed switch K2 is connected with the external power supply PS, and the other end of the low liquid level reed switch K2 is connected with the ground through the low liquid level sensor S2;

[0011] Further comprising:

[0012] A controllable switch K1', which is connected in series between the high liquid level dry reed switch K1 and the ground;

[0013] A controllable switch K2', which is connected in series between the low liquid level dry reed switch K2 and the ground;

[0014] A controller, which is connected with the control ends of the controllable switch K1' and the controllable switch K2'.

[0015] Further, a state indicating lamp LED is further included, which is respectively connected between an external power supply PS and the ground.

[0016] Further, the controllable switch K1' adopts a relay, wherein the coil of the relay is the control end of the controllable switch K1'.

[0017] Further, the controllable switch K2' adopts a relay, wherein the coil of the relay is the control end of the controllable switch K2'.

[0018] Further, the controller adopts a PLC.

[0019] Based on the same inventive concept, the utility model also provides a transformer, contain above-mentioned transformer oil level gauge alarm system.

[0020] The utility model has the advantages of:

[0021] The system drives the connecting rod to rotate through the floating ball, so that the magnet 6 triggers the high liquid level dry reed switch K1 or the low liquid level dry reed switch K2, and oil level monitoring is realized. The PLC controller controls the controllable switch K1' and the controllable switch K2' according to the sensor signal, forms interlocking protection, avoids high and low liquid level signal conflict. The dry reed switch and the relay cooperate with intelligent control, ensure monitoring precision and response speed. The state indicating lamp LED displays system state, and the mechanical structure composed of the rotating shaft and the connecting rod is simple and reliable. The system has the characteristics of high-precision monitoring, safety interlocking and intelligent control, can effectively prevent transformer oil level abnormal risk, improves equipment operation reliability, and is suitable for industrial liquid level monitoring demand. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0023] Figure 1 It is a transformer oil level gauge alarm system structure diagram.

[0024] Figure 2 For the switch interlocking circuit diagram. DETAILED DESCRIPTION

[0025] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a particular orientation, to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0026] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of a specific example are described below. Of course, they are only examples, and the purpose is not to limit the utility model.

[0027] The embodiments of the utility model will be described in detail below in combination with the drawings.

[0028] The transformer oil level gauge alarm system disclosed in the embodiment comprises a connecting rod 1, a floating ball 2, an oil pillow main body container 3, a high liquid level sensor S1, a low liquid level sensor S2, a high liquid level dry reed switch K1, a low liquid level dry reed switch K2, an oil level gauge dial 5, controllable switches K1' and K2', a controller and a state indicating lamp LED. In addition, the oil pillow main body container 3 is provided with a rotating shaft 4, the position of the rotating shaft 4 is fixed and unchanged, the connecting rod 1 is installed on the rotating shaft 4, and the connecting rod 1 rotates around the rotating shaft 4 as the rotation center. The embodiment also provides an external power supply PS for supplying power to the system. As shown in the accompanying drawings. Figure 1 、 2 As shown.

[0029] Among them, the controllable switch K1' adopts a relay, wherein the coil of the relay is the control end of the controllable switch K1'. The controllable switch K2' adopts a relay, wherein the coil of the relay is the control end of the controllable switch K2'. The controller adopts a PLC.

[0030] The installation and connection mode of each component and the working principle of the system are described below.

[0031] High liquid level dry reed switch K1 and low liquid level dry reed switch K2 are installed in different positions of oil level gauge dial 5, and float ball 2 is installed at the front end of connecting rod 1, and magnet 6 is installed at the end of connecting rod 1 in oil level gauge dial 5, when the liquid level of oil in oil pillow main body container 3 changes, the height of float ball 2 also changes, which drives connecting rod 1 to rotate around rotating shaft 4 as the center, and the position of magnet 6 at the end of connecting rod 1 changes, that is, swings between high liquid level dry reed switch K1 and low liquid level dry reed switch K2. High liquid level dry reed switch K1 and low liquid level dry reed switch K2 are in an off state when magnet 6 is not close.

[0032] When the liquid level reaches the upper limit, magnet 6 is close to high liquid level dry reed switch K1, and high liquid level dry reed switch K1 is turned on, and when the liquid level does not reach the upper limit, magnet 6 is away from high liquid level dry reed switch K1, and high liquid level dry reed switch K1 is turned off.

[0033] When the liquid level reaches the lower limit, magnet 6 is close to low liquid level dry reed switch K2, and low liquid level dry reed switch K2 is turned on, and when the liquid level does not reach the lower limit, magnet 6 is away from low liquid level dry reed switch K2, and low liquid level dry reed switch K2 is turned off.

[0034] One end of high liquid level dry reed switch K1 is connected with external power supply PS, and the other end of high liquid level dry reed switch K1 is connected with ground through high liquid level sensor S1.

[0035] One end of low liquid level dry reed switch K2 is connected with external power supply PS, and the other end of low liquid level dry reed switch K2 is connected with ground through low liquid level sensor S2.

[0036] Controllable switch K1' is connected in series between high liquid level dry reed switch K1 and ground.

[0037] Controllable switch K2' is connected in series between low liquid level dry reed switch K2 and ground.

[0038] The controller is connected with the control ends of controllable switch K1' and controllable switch K2'.

[0039] Status indicator lamp LED is connected between external power supply PS and ground.

[0040] The transformer oil level gauge alarm system disclosed in the embodiment has a switch interlocking function, which will be described in detail below.

[0041] When the liquid level does not reach the upper limit and the lower limit, the controller PLC controls controllable switch K1' and controllable switch K2' to be turned on, because high liquid level dry reed switch K1 and low liquid level dry reed switch K2 are in an off state when magnet 6 is not close, so high liquid level sensor S1 and low liquid level sensor S2 do not send alarm signals.

[0042] When the liquid level reaches the upper limit, the magnet 6 is close to the high liquid level reed switch K1, the high liquid level reed switch K1 is turned on, the branch where the high liquid level sensor S1 is located is turned on, the high liquid level sensor S1 sends an alarm signal, and the alarm signal is transmitted to the controller PLC, and the controller PLC controls the controllable switch K1' (relay) to be turned off. Therefore, the high liquid level reed switch K1 and the controllable switch K1' (relay) form interlocking, which can prevent the branch where the high liquid level sensor S1 is located and the branch where the low liquid level sensor S2 is located from being turned on at the same time.

[0043] When the liquid level is lower than the upper limit, the magnet 6 is away from the high liquid level reed switch K1, the high liquid level reed switch K1 is turned off, the branch where the high liquid level sensor S1 is located is turned off, the high liquid level sensor S1 stops sending an alarm signal, and the controller PLC controls the controllable switch K1' (relay) to be turned on.

[0044] When the liquid level reaches the lower limit, the magnet 6 is close to the low liquid level reed switch K2, the low liquid level reed switch K2 is turned on, the branch where the low liquid level sensor S2 is located is turned on, the low liquid level sensor S2 sends an alarm signal, and the alarm signal is transmitted to the controller PLC, and the controller PLC controls the controllable switch K2' (relay) to be turned off. Therefore, the low liquid level reed switch K2 and the controllable switch K2' (relay) form interlocking, which can prevent the branch where the high liquid level sensor S1 is located and the branch where the low liquid level sensor S2 is located from being turned on at the same time.

[0045] When the liquid level is higher than the upper limit, the magnet 6 is away from the low liquid level reed switch K2, the low liquid level reed switch K2 is turned off, the branch where the low liquid level sensor S2 is located is turned off, the low liquid level sensor S2 stops sending an alarm signal, and the controller PLC controls the controllable switch K2' (relay) to be turned on.

[0046] The transformer oil level gauge alarm system disclosed in the embodiment has the function of power-on indication: when the circuit is turned on, the status indicator lamp LED is lit, otherwise it is extinguished.

[0047] The transformer oil level gauge alarm system disclosed in the embodiment realizes efficient monitoring and intelligent control through the cooperative work of various components. The float ball 2 floats up and down with the change of the oil level in the oil pillow main body container 3, drives the connecting rod 1 to rotate around the fixed rotating shaft 4, and makes the magnet 6 installed at the end of the connecting rod swing in the oil level gauge dial 5. When the oil level reaches the upper limit, the magnet 6 triggers the high liquid level dry reed switch K1 to conduct, and the high liquid level sensor S1 sends an alarm signal, and at the same time the PLC controller controls the controllable switch K1' to be disconnected to realize interlocking; similarly, the low liquid level dry reed switch K2 and the controllable switch K2' work cooperatively when the oil level reaches the lower limit. The system uses dry reed switches and relays, cooperates with PLC intelligent control, not only ensures the monitoring accuracy and response speed, but also avoids the conflict of high and low liquid level signals through the physical interlocking mechanism. The status indicator light LED displays the power supply state of the system in real time, and the mechanical structure composed of the rotating shaft 4 and the connecting rod 1 is simple and reliable. The design has the advantages of high-precision monitoring, safety interlocking and intelligent control, can effectively prevent the abnormal risk of transformer oil level, significantly improves the operation reliability of power equipment, and is suitable for liquid level monitoring needs in various industrial scenes.

[0048] The transformer disclosed in the embodiment comprises the transformer oil level gauge alarm system.

Claims

1. A transformer oil level gauge alarm system, comprising a connecting rod, a floating ball, an oil reservoir main body container, a high liquid level sensor S1, a low liquid level sensor S2, a high liquid level reed switch K1, a low liquid level reed switch K2, and an oil level gauge dial; wherein the high liquid level reed switch K1 and the low liquid level reed switch K2 are installed at different positions in the oil level gauge dial, the floating ball is installed at the front end of the connecting rod, and a magnet is installed at the end of the connecting rod in the oil level gauge dial; the oil reservoir main body container is installed with a rotating shaft, the position of the rotating shaft is fixed, the connecting rod is installed on the rotating shaft, and the connecting rod rotates around the rotating shaft as the center; one end of the high liquid level reed switch K1 is connected with an external power supply PS, and the other end of the high liquid level reed switch K1 is connected with the ground through the high liquid level sensor S1; one end of the low liquid level reed switch K2 is connected with the external power supply PS, and the other end of the low liquid level reed switch K2 is connected with the ground through the low liquid level sensor S2; characterized in that it further comprises: a controllable switch K1', which is connected in series between the high liquid level reed switch K1 and the ground; a controllable switch K2', which is connected in series between the low liquid level reed switch K2 and the ground; a controller, which is connected with the control ends of the controllable switch K1' and the controllable switch K2'.

2. The transformer oil level gauge alarm system according to claim 1, wherein a status indicator lamp LED, which is connected between the external power supply PS and the ground.

3. The transformer oil level gauge alarm system of claim 1, wherein The controllable switch K1' is a relay, wherein the coil of the relay is the control end of the controllable switch K1'.

4. The transformer oil level gauge alarm system of claim 1, wherein The controllable switch K2' is a relay, wherein the coil of the relay is the control end of the controllable switch K2'.

5. The oil level gauge alarm system for a transformer according to any one of claims 1 to 4, characterized in that, The controller is a PLC.

6. A transformer, characterized by A transformer oil level gauge alarm system as claimed in any one of claims 1-5. A transformer oil level gauge alarm system as claimed in any one of claims 1-5.

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