Monitoring device for micro water in transformer oil

Abstract

The utility model relates to the technical field of micro-water monitoring, in particular to a monitoring device for micro-water in transformer oil, which comprises a detection module and a wiping module. The detection module comprises a supporting frame, a sampling pipeline connected with the supporting frame, an electromagnetic valve mounted on the sampling pipeline, a baffle arranged at the bottom of the electromagnetic valve and connected with the supporting frame, a light touch switch embedded in one side of the baffle, and two guide rods embedded in the top of the supporting frame; the sliding block is movably embedded in the top of the supporting frame and connected between the two guide rods in a sliding mode. According to the utility model, when the micro-water sensor is used for measuring for multiple times, the stepping motor drives the supporting plate and the micro-water sensor to rotate for a circle every time the micro-water sensor is in contact with a sample in the sampling channel, then the measuring end of the micro-water sensor penetrates through the space between the two sponges, and the two sponges are matched with each other to clean the measuring end of the micro-water sensor; the influence of the first residual water on the second measurement result is prevented, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-water monitoring, in particular to a device for monitoring micro-water in transformer oil. Background Art

[0002] The transformer consists of an iron core (or magnetic core) and a coil. The coil has two or more windings, of which the winding connected to the power supply is called the primary coil, and the remaining windings are called secondary coils. It can transform AC voltage, current and impedance. A simple iron core transformer consists of an iron core made of soft magnetic material and two coils with different numbers of turns on the iron core. The function of the iron core is to strengthen the magnetic coupling between the two coils. In order to reduce the eddy current and hysteresis loss in the iron, the iron core is made of laminated painted silicon steel sheets; there is no electrical connection between the two coils, and the coils are wound with insulated copper wire (or aluminum wire).

[0003] Application No. CN201220298729.8 discloses an online monitoring device for trace moisture in running transformer oil, which is composed of an oil inlet, an oil pipeline, an oil outlet, a sealing ring, a micro-water sensor and a micro-water detection unit, wherein the oil inlet is directly connected to the transformer oil sampling valve through an oil pump; the extracted oil contacts the micro-water sensor through the oil pipeline to realize micro-water measurement; the oil outlet is connected to the spare valve of the transformer to realize oil circulation; the sealing ring ensures that the oil pipeline is isolated from the outside air; the signal sensed by the micro-water sensor is transmitted to the micro-water detection unit through a cable. When the utility model is used to monitor the trace water in the transformer insulating oil online, the measurement error caused by the dead zone of the oil sample due to the non-flow of the oil sample is avoided. When the application is used specifically, since the measuring end of the micro-water sensor is always located in the oil pipeline, the measuring end cannot be wiped after contacting water, resulting in that when the second detection is performed, the residual water in the first time will affect the second measurement result. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A transformer oil micro-water monitoring device comprises a detection module and a wiping module, wherein the detection module comprises a support frame, a sampling pipeline connected to the support frame, a solenoid valve installed on the sampling pipeline, a baffle plate arranged at the bottom of the solenoid valve and connected to the support frame, a touch switch embedded in one side of the baffle plate, two guide rods embedded in the top of the support frame, a slider movably embedded in the top of the support frame and slidably connected between the two guide rods, a stepping motor connected to the top of the slider, a support plate connected to the output shaft of the stepping motor, a convex head connected to the outer wall of the support plate, a micro-water sensor connected to the top of the support plate, a cross plate connected to the top of the support frame, a micro-water analyzer connected to the top of the cross plate, a spring attached to one side of the support plate and connected to the support frame, the touch switch is electrically connected to the solenoid valve, and the micro-water analyzer is wired to the micro-water sensor; and a wiping module comprises an L-shaped plate connected to the front side of the support frame, a U-shaped plate connected to the top of the L-shaped plate, and two sponges installed inside the U-shaped plate, wherein the two sponges are attached to each other.

[0007] By adopting the above technical solution, when the micro-water sensor performs multiple measurements, each time it contacts the sample in the sampling channel, the stepper motor will rotate the support plate and the micro-water sensor for one circle, and then the measuring end of the micro-water sensor passes through two sponges. The two sponges work together to wipe the measuring end of the micro-water sensor clean to prevent the residual water from the first measurement from affecting the second measurement result, thereby improving the detection accuracy.

[0008] In a preferred example, the utility model can be further configured as follows: a shallow groove suitable for installing a touch switch is opened on one side of the baffle, and an arc surface is set at the outer edge of the shallow groove.

[0009] In a preferred example, the utility model can be further configured as follows: the two guide rods are vertically symmetrical about the vertical center plane of the slider, and the guide rods and the slider are both made of stainless steel.

[0010] In a preferred example, the utility model can be further configured as follows: the support plate is composed of an O-shaped plate and a truncated cone, the O-shaped plate is located at the bottom of the truncated cone and fits with the top of the support frame, and the bottom of the micro-water sensor is connected to the top of the truncated cone.

[0011] In a preferred example, the utility model can be further configured as follows: the convex head is set to be hemispherical, and the diameter is smaller than the diameter of the shallow groove.

[0012] In a preferred example, the utility model can be further configured as follows: notches are provided on both sides of the joint of the two sponges.

[0013] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0014] 1. In the utility model, when the micro-water sensor performs multiple measurements, each time it contacts the sample in the sampling channel, the stepper motor will rotate the support plate and the micro-water sensor for one circle, and then the measuring end of the micro-water sensor passes through two sponges, and the two sponges cooperate to wipe the measuring end of the micro-water sensor clean to prevent the residual water from the first measurement from affecting the second measurement result, thereby improving the detection accuracy.

[0015] 2. In the utility model, when the stepper motor rotates with the support plate, the measuring end of the micro-water sensor enters the sampling pipe under the indirect squeezing of the spring, and then at this time, the convex head rotating with the support plate will squeeze the touch switch, and then the solenoid valve opens the inner end of the sampling pipe, the micro-water sensor detects the micro-water in the oil, and then the micro-water analyzer performs data analysis on the micro-water, the structure is simple, and the measurement is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the detection module of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the baffle and support plate of the utility model;

[0019] Figure 4 This is a schematic diagram of the wiping module of the utility model.

[0020] Reference numerals:

[0021] 100, detection module; 110, support frame; 120, sampling pipeline; 130, solenoid valve; 140, baffle; 150, touch switch; 160, guide rod; 170, slider; 180, stepping motor; 190, support plate; 191, convex head; 192, micro-water sensor; 193, horizontal plate; 194, micro-water analyzer; 195, spring;

[0022] 200, wiping module; 210, L-shaped plate; 220, U-shaped plate; 230, sponge. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0024] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0025] A device for monitoring trace water in transformer oil provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0026] Embodiment 1:

[0027] Combination Figure 1-4 As shown, the utility model provides a transformer oil micro-water monitoring device, including a detection module 100 and a wiping module 200, wherein the detection module 100 includes a support frame 110, a sampling pipe 120 connected to the support frame 110, a solenoid valve 130 installed on the sampling pipe 120, a baffle 140 provided at the bottom of the solenoid valve 130 and connected to the support frame 110, a touch switch 150 embedded in one side of the baffle 140, two guide rods 160 embedded in the top of the support frame 110, and a sliding member 150 movably embedded in the top of the support frame 110 and slidably connected between the two guide rods 160. Block 170, a stepper motor 180 connected to the top of the slider 170, a support plate 190 connected to the output shaft of the stepper motor 180, a convex head 191 connected to the outer wall of the support plate 190, a micro-water sensor 192 connected to the top of the support plate 190, a cross plate 193 connected to the top of the support frame 110, a micro-water analyzer 194 connected to the top of the cross plate 193, a spring 195 attached to one side of the support plate 190 and connected to the support frame 110, the touch switch 150 is electrically connected to the solenoid valve 130, and the micro-water analyzer 194 is wiredly connected to the micro-water sensor 192;

[0028] The wiping module 200 includes an L-shaped plate 210 connected to the front side of the support frame 110, a U-shaped plate 220 connected to the top of the L-shaped plate 210, and two sponges 230 installed inside the U-shaped plate 220, and the two sponges 230 are attached to each other.

[0029] Furthermore, the two guide rods 160 are vertically symmetrical about the vertical center plane of the slider 170 , and the guide rods 160 and the slider 170 are both made of stainless steel. With this structural design, the slider 170 can move on the guide rods 160 very smoothly.

[0030] Furthermore, the support plate 190 is composed of an O-shaped plate and a truncated cone. The O-shaped plate is located at the bottom of the truncated cone and fits with the top of the support frame 110. The bottom of the micro-water sensor 192 is connected to the top of the truncated cone. With this structural design, the support plate 190 rotates smoothly, and then the truncated cone raises the micro-water sensor 192, so that the measuring end of the micro-water sensor 192 can smoothly enter the sampling pipe 120.

[0031] Embodiment 2:

[0032] Combination Figure 3As shown, on the basis of the first embodiment, a shallow groove suitable for installing the touch switch 150 is opened on one side of the baffle 140, and an arc surface is set at the outer edge of the shallow groove to provide conditions for installing the touch switch 150. Then, the design of the arc surface makes it easy for the protrusion 191 to leave the shallow groove, ensuring that the support plate 190 can rotate flexibly.

[0033] Specifically, the convex head 191 is set to be hemispherical, and its diameter is smaller than the diameter of the shallow groove. With this size design, the convex head 191 can squeeze the touch switch 150 in the shallow groove, ensuring that the micro-water sensor 192 can contact the sample in the sampling pipe 120.

[0034] Embodiment three:

[0035] Combination Figure 1 and Figure 4 As shown, in the above embodiment, notches are provided on both sides of the joint of the two sponges 230 , and the notches are provided to facilitate the measuring end of the micro-water sensor 192 to pass through between the two sponges 230 .

[0036] The working principle and use process of the utility model are as follows: when the device is put into actual use, the stepper motor 180 rotates with the support plate 190 and the micro-water sensor 192. Every time the support plate 190 rotates one circle, the micro-water sensor 192 enters the sampling pipe 120 at its measuring end under the indirect squeezing of the spring 195. Then, at this time, the convex head 191 rotating with the support plate 190 will squeeze the touch switch 150, and then the solenoid valve 130 opens the inner end of the sampling pipe 120. The micro-water sensor 192 detects the micro-water in the oil, and then the micro-water analyzer 194 performs data analysis on the micro-water. Then, when performing a secondary detection, the stepper motor 180 continues to rotate with the support plate 190, and then the measuring end of the micro-water sensor 192 leaving the sampling pipe 120 passes between the two sponges 230. The two sponges 230 cooperate to wipe the measuring end of the micro-water sensor 192 clean to prevent the residual water in the first time from affecting the second measurement result, thereby improving the detection accuracy.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for monitoring micro-water in transformer oil, characterized in that: include: A detection module (100), the detection module (100) comprising a support frame (110), a sampling pipe (120) connected to the support frame (110), a solenoid valve (130) installed on the sampling pipe (120), a baffle (140) arranged at the bottom of the solenoid valve (130) and connected to the support frame (110), a touch switch (150) embedded in one side of the baffle (140), two guide rods (160) embedded in the top of the support frame (110), a slider (170) movably embedded in the top of the support frame (110) and slidably connected between the two guide rods (160), and a slider (170) connected to the top of the slider (170). A stepper motor (180), a support plate (190) connected to an output shaft of the stepper motor (180), a convex head (191) connected to an outer wall of the support plate (190), a micro-water sensor (192) connected to the top of the support plate (190), a horizontal plate (193) connected to the top of the support frame (110), a micro-water analyzer (194) connected to the top of the horizontal plate (193), and a spring (195) attached to one side of the support plate (190) and connected to the support frame (110); the touch switch (150) is electrically connected to the solenoid valve (130); and the micro-water analyzer (194) is wiredly connected to the micro-water sensor (192); A wiping module (200), the wiping module (200) comprising an L-shaped plate (210) connected to the front side of the support frame (110), a U-shaped plate (220) connected to the top of the L-shaped plate (210), and two sponges (230) installed inside the U-shaped plate (220), the two sponges (230) being attached to each other.

2. A transformer oil micro-water monitoring device according to claim 1, characterized in that: A shallow groove suitable for installing the touch switch (150) is provided on one side of the baffle (140), and an arc surface is provided at the outer edge of the shallow groove.

3. A transformer oil micro-water monitoring device according to claim 1, characterized in that: The two guide rods (160) are vertically symmetrical about a vertical center plane of the sliding block (170), and the guide rods (160) and the sliding block (170) are both made of stainless steel.

4. A transformer oil micro-water monitoring device according to claim 1, characterized in that: The support plate (190) is composed of an O-shaped plate and a truncated cone. The O-shaped plate is located at the bottom of the truncated cone and fits with the top of the support frame (110). The bottom of the micro-water sensor (192) is connected to the top of the truncated cone.

5. A transformer oil micro-water monitoring device according to claim 2, characterized in that: The convex head (191) is configured to be hemispherical, and its diameter is smaller than the diameter of the shallow groove.

6. A transformer oil micro-water monitoring device according to claim 1, characterized in that: Notches are provided on both sides of the joint of the two sponges (230).

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