Disassembly-free circulating type transformer oil sample micro-flow sampling device

Abstract

The invention discloses a disassembly-free circulating type transformer oil sample micro-flow sample introduction device, and relates to the technical field of transformer oil sample micro-flow sample introduction, the sample introduction device comprises a connector and a circulating pipe, a disassembly-free module comprises a mounting rack, a rotating ring, an inner jacking block and an outer pressing block, when the sample introduction device works, a hose is inserted into the connector, and when the hose is inserted, the rotating ring is inserted into the mounting rack; when the hose needs to be fixed, the outer pressing blocks are adjusted firstly, the multiple outer pressing blocks arrayed around the central axis of the rotating ring synchronously contract towards the central axis of the rotating ring till the outer pressing blocks are connected with the hose, at the moment, an oil drain valve of the transformer is opened, an oil sample enters a connector from the hose, and then the hose is fixed. The multiple inner jacking blocks are driven to synchronously slide towards the outer pressing blocks in the radial direction of the rotating ring to clamp the hose in cooperation with the outer pressing blocks, in the process, the rotating ring rotates synchronously, the inner jacking blocks rotate around the central axis of the rotating ring, the contact positions of the inner jacking blocks and the hose are made to change in the circumferential direction, and the clamping uniformity and stability are further enhanced.

Description

Technical Field

[0001] This invention relates to the field of transformer oil sample micro-flow injection technology, specifically a non-disassembly, circulating transformer oil sample micro-flow injection device. Background Technology

[0002] In existing transformer oil sample testing processes, the oil sample injection device typically requires disassembly and replacement of different connectors to adapt to different transformer specifications, followed by connection via a flexible hose. This process is not only cumbersome and time-consuming but also easily leads to contact between the transformer's internal oil and air, introducing moisture, impurities, and other contaminants, affecting oil purity. Furthermore, traditional injection devices are mostly single-injection structures, with the oil sample directly discharged after passing through the testing unit, failing to achieve sample recycling and resulting in waste, making it difficult to meet the needs of repeated testing. To address these issues, this invention proposes a non-disassembly, circulating micro-flow transformer oil sample injection device, improving the efficiency and reliability of transformer oil sample testing. Summary of the Invention

[0003] The purpose of this invention is to provide a non-disassembly, circulating transformer oil sample micro-flow injection device to solve the problem of cumbersome connection between the injection device and transformers of different specifications in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: the sample injection device includes a connector and a circulation tube, the connector being disposed at the inlet of the circulation tube, characterized in that: the sample injection device further includes a non-disassembly module; The non-disassembly module includes a mounting bracket, a swivel ring, an inner top block, and an outer pressure block; The mounting bracket is fixedly installed inside the connector. The swivel ring and the mounting bracket are rotatably connected. The rotation axis of the swivel ring coincides with the central axis of the connector. The inner top block is located between the swivel ring and the outer pressure block. The inner top block passes through the swivel ring radially. The inner top block and the swivel ring are slidably connected. The inner top block slides radially along the swivel ring. The outer pressure block is slidably connected to one end of the connector. The outer pressure block slides radially along the swivel ring. There are multiple inner top blocks and outer pressure blocks arranged in an array around the central axis of the swivel ring.

[0005] The inner top block has an arc-shaped or V-shaped end face facing the inner wall of the connector. After sliding continuously towards the outer pressure block, it contacts the inner wall of the hose. The outer pressure block has an arc-shaped end face facing the inner top block. When the sample injection device is working, the hose is inserted into the connector. During insertion, the hose is located between the inner top block and the outer pressure block. When it is necessary to fix the hose, the outer pressure block is adjusted first. Multiple outer pressure blocks arrayed around the central axis of the rotating ring synchronously retract towards the central axis of the ring until the outer pressure block contacts the hose. At this time, the oil drain valve of the transformer is opened, and the oil sample enters the connector from the hose. This drives multiple inner top blocks to slide synchronously towards the outer pressure block along the radial direction of the rotating ring, cooperating with the outer pressure block to clamp the hose. During this process, the rotating ring rotates synchronously, causing the inner top blocks to rotate around the central axis of the rotating ring, causing the contact position between the inner top block and the hose to change circumferentially, further enhancing the uniformity and stability of the clamping. Once the oil sample stops flowing, the inner top block loses its driving force and no longer applies pressure to the hose. The outer pressure block is then adjusted to reset, releasing the hose clamp and allowing operators to quickly remove or replace it. The entire process requires no tools to disassemble the connector or circulation tube; the hose clamping and releasing are accomplished solely by adjusting the outer pressure block. This effectively avoids the problems of component wear and seal failure caused by frequent disassembly in traditional sampling devices, significantly improving the efficiency of oil sample testing and extending the device's lifespan.

[0006] Furthermore, the non-disassembly module also includes an adjustment mechanism, with multiple adjustment mechanisms arrayed around the central axis of the connector; The adjusting mechanism includes an adjusting ring, a helical gear, a transmission gear, a rotating gear, a gear carrier, and a connecting rod; An adjusting ring is fitted onto a connecting head. The adjusting ring and the connecting head are coaxial and rotatably connected. The helical gear and the outer wall of the connecting head are rotatably connected. One end of the adjusting ring meshes with the helical gear. The gear frame and the outer wall of the connecting head are fixedly connected. Both the transmission gear and the rotating gear are rotatably connected to the gear frame. The transmission gear meshes with the helical gear and the rotating gear. One end of the rotating gear passes through the gear frame and is hinged to the connecting rod. The connecting rod and the outer pressure block are hinged. The outer pressure block and the gear frame are slidably connected. The outer pressure block slides along the radial direction of the rotating ring on the gear frame.

[0007] When clamping the hose, the operator manually twists the adjusting ring. The end of the adjusting ring that meshes with the helical gear drives the helical gear to rotate synchronously. The helical gear then drives the transmission gear to rotate, and the transmission gear further drives the rotating gear to rotate. When the rotating gear rotates, it drives the connecting rod hinged to it to rotate around its own rotation axis. This, in turn, pushes and pulls the outer pressure block through the connecting rod, causing the outer pressure block to move closer to or away from the central axis of the rotating ring, thus clamping or releasing the outer wall of the hose.

[0008] Furthermore, multiple rollers are arrayed on the outer circular end face of the inner top block, and the multiple rollers are rotatably connected to the inner top block, with the rotation axis of the multiple rollers coinciding with the central axis of the rotating ring.

[0009] When the oil sample enters the connector and drives the rotating ring to rotate, the rotating ring drives the inner top block to rotate. While the inner top block and the outer pressure block clamp the hose, the inner top block continues to rotate. The roller converts the sliding friction between the inner top block and the inner wall of the hose into rolling friction, effectively reducing the frictional force between them and preventing wear on the hose's inner wall caused by continuous sliding friction. Simultaneously, during the rotation of the inner top block, the support position of the roller on the hose's inner wall continuously changes circumferentially, making the pressure distribution more uniform and preventing excessive or insufficient local pressure that could lead to hose deformation and oil leakage.

[0010] Furthermore, the non-disassembly-free module also includes a rotating mechanism; The rotating mechanism includes a defoaming disc, a push-pull rod, and a fixing rod; The defoaming disc is located on the side of the rotating ring away from the circulation pipe. The defoaming disc and the push-pull rod are hinged together. The push-pull rod and the inner top block are partially hinged together inside the rotating ring. The fixing rod and the defoaming disc are fixedly connected. The central axis of the defoaming disc and the fixing rod coincides with the central axis of the rotating ring. The fixing rod passes through part of the mounting bracket. The mounting bracket limits the fixing rod to slide only along the central axis of the rotating ring.

[0011] When the oil sample enters the connector from the hose, it first impacts the defoaming disc, pushing the defoaming disc and the fixing rod to slide along the central axis of the rotating ring towards the circulation pipe. As the defoaming disc slides, the push-pull rod drives the inner top block to slide radially outward along the rotating ring, thus clamping the hose.

[0012] Furthermore, a helical blade assembly is sleeved on the fixing rod, and the helical blade assembly and the fixing rod are fixedly connected.

[0013] When the oil sample flows through the helical blade assembly, it drives the assembly to rotate. This rotation drives the fixed rod to slide along the central axis of the rotating ring towards the circulation tube, thereby causing the defoaming disc to slide and further increasing the pressure of the inner top block on the inner wall of the hose. Simultaneously, the rotation of the helical blade assembly also drives the fixed rod to rotate, which in turn drives the defoaming disc to rotate. The defoaming disc, in turn, drives the rotating ring to rotate via the push-pull rod and the inner top block, achieving uniform circumferential pressure applied by the inner top block to the inner wall of the hose. Furthermore, when the helical blade assembly rotates, under the action of centrifugal force, it can also gather air bubbles with a density much lower than that of the oil sample towards the central axis of the rotating ring, facilitating the defoaming disc to break up the gathered air bubbles.

[0014] Furthermore, a positive magnet is fixedly installed on the end of the fixing rod away from the defoaming plate, and a reverse magnet is provided on the mounting bracket. The central axes of the positive magnet and the reverse magnet coincide with the central axis of the rotating ring. Along the central axis of the rotating ring, the closer the positive magnet is to the negative magnet, the stronger the repulsive force between the positive and negative magnets.

[0015] When the injection device stops injecting the sample, the thrust generated by the oil sample flow disappears. Under the repulsive force between the positive magnet and the negative magnet, the fixed rod is pushed to slide and reset in the direction away from the circulation tube. When the fixed rod resets, it drives the defoaming plate to move synchronously. The defoaming plate pulls the inner top block away from the inner wall of the hose along the rotating ring radially through the push-pull rod. The pressure of the inner top block on the hose is then released, making it easier for the operator to disassemble the hose.

[0016] Furthermore, the defoaming plate is equipped with defoaming holes.

[0017] The defoaming hole is a tapered through-hole, with the diameter of the end near the hose being larger than the diameter of the end away from the hose. When the oil sample carrying air bubbles impacts the defoaming plate, the air bubbles enter the defoaming hole along with the oil sample. Under the contraction of the tapered channel, the air bubbles are squeezed and broken, effectively reducing the air bubble content in the oil sample and preventing air bubbles from entering the circulation tube and affecting the accuracy of subsequent detection.

[0018] Furthermore, a dust cover is fitted onto the adjustment mechanism, and the dust cover is fixedly connected to the outer wall of the connector.

[0019] Dust covers can effectively prevent dust and impurities from entering the gear meshing parts of the adjustment mechanism, avoiding problems such as the adjustment ring not rotating smoothly or the gears wearing out due to foreign objects getting stuck. This ensures the adjustment accuracy and stability of the external pressure block and extends the service life of the adjustment mechanism.

[0020] Furthermore, the circulation pipe consists of an inlet pipe and an outlet pipe; The inlet and outlet pipes are connected by a pipeline, and the connector is fixedly connected to the inlet end of the inlet pipe. A solenoid valve is installed between the outlet end of the inlet pipe and the connection port of the inlet and outlet pipes.

[0021] The outlet of the oil inlet pipe is connected to the inlet of the detection device, the inlet of the oil outlet pipe is connected to the outlet of the detection device, and the outlet of the oil outlet pipe is connected to the oil sample inlet of the transformer. A solenoid valve controls the flow rate of the oil sample entering the detection device, achieving a micro-flow of the oil sample within the device and ensuring the accuracy of the test results. The oil inlet and outlet pipes are connected by a pipeline; large-flow oil samples flow back into the transformer through this connecting pipeline, preventing the oil sample from remaining in the detection device for too long and causing compositional changes. This also ensures stable thrust on the spiral blade assembly and defoaming disc, maintaining continuous and uniform clamping of the hose by the inner top block.

[0022] Furthermore, the radius of the arc-shaped end face of the inner top block is greater than or equal to the radius of the inner wall of the connector; The radius of the arc-shaped end face of the outer pressure block is less than or equal to the radius of the inner wall of the connector.

[0023] A rubber pad is provided on the arc-shaped end face of the outer pressure block. The curvature of the rubber pad is consistent with the curvature of the end face of the outer pressure block, that is, the end face radius is less than or equal to the inner wall radius of the connector. This ensures that when the connecting pipe diameter is smaller than the connector diameter, the rubber pad can tightly fit against the outer wall of the hose under the internal thrust of the inner top block, avoiding insufficient or excessive clamping. After the inner top block is pushed by the push rod and supported by the inner wall of the outer pressure block, the arc-shaped end face deforms to a certain extent, and the end face radius gradually approaches the inner wall radius of the hose. This ensures the adaptability and clamping stability of hoses of different diameters, effectively solving the problems of traditional metal pressure blocks easily damaging hoses and poor clamping sealing.

[0024] Compared with the prior art, the beneficial effects of the present invention are: 1. After the result adjustment mechanism is adjusted, the external pressure block of this application can clamp tubing of different sizes without disassembling the connector of the injection device, in conjunction with the inner top block. 2. The spiral blade assembly of this application rotates when the oil sample flows through it, and then drives the inner top block and the rotating ring to rotate and slide through the rotation mechanism. The inner top block can adaptively clamp the hose without the need for an additional driving device, and ensures that the pressure of the inner top block on the inner wall of the hose is applied evenly in the circumferential direction. This avoids the problem of oil leakage caused by hose deformation due to insufficient or excessive local force during the traditional adaptive clamping process. 3. The positive and negative magnets of this application work together to automatically push the fixing rod to reset after the oil sample stops flowing. This releases the pressure of the inner top block on the hose without manual operation, making the hose disassembly process more convenient and efficient. It effectively avoids the problem of hose jamming or damage caused by untimely manual reset in traditional devices. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure when the present invention is connected to the detection device; Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 3 This is a schematic diagram of the overall appearance structure of the present invention with the circulation tube removed; Figure 4 This is a schematic diagram of the overall appearance structure of the present invention without the circulation tube and dust cover; Figure 5 This is a schematic diagram of the front structure of the present invention; Figure 6 This is a schematic cross-sectional view of the structure for removing the circulation pipe according to the present invention; Figure 7 This is a schematic diagram of the connection structure of the rotating mechanism of the present invention; Figure 8 This is a schematic diagram of another cross-sectional structure of the present invention with the circulation pipe removed; Figure 9 for Figure 4 A magnified view of part A.

[0026] In the diagram: 1. Connector; 2. Circulation pipe; 3. Non-disassembly module; 21. Oil inlet pipe; 22. Oil outlet pipe; 23. Solenoid valve; 31. Mounting bracket; 32. Rotary ring; 33. Inner top block; 34. Outer pressure block; 35. Adjustment mechanism; 36. Adjustment ring; 37. Helical gear; 38. Transmission gear; 39. Rotating gear; 310. Gear frame; 311. Connecting rod; 312. Roller; 313. Rotating mechanism; 314. Dust cover; 3131. Defoaming disc; 3132. Push-pull rod; 3133. Fixing rod; 3134. Spiral blade assembly; 3135. Positive magnet; 3136. Reverse magnet; 3137. Defoaming hole. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: Figure 1 - Figure 8 As shown, the present invention provides a technical solution: a non-disassembly, circulating transformer oil sample micro-flow injection device. like Figures 1 to 3 and Figure 7 As shown, the injection device includes a connector 1 and a circulation tube 2. The connector 1 is located at the inlet of the circulation tube 2. The injection device is characterized by further including a non-disassembly module 3. The non-disassembly module 3 includes a mounting bracket 31, a rotating ring 32, an inner top block 33, and an outer pressure block 34; Mounting bracket 31 is fixedly installed inside connector 1. Rotary ring 32 and mounting bracket 31 are rotatably connected. The rotation axis of rotating ring 32 coincides with the central axis of connector 1. Inner top block 33 is located between rotating ring 32 and outer pressure block 34. Inner top block 33 passes through rotating ring 32 radially. Inner top block 33 and rotating ring 32 are slidably connected. Inner top block 33 slides radially along rotating ring 32. Outer pressure block 34 is slidably connected to one end of connector 1. Outer pressure block 34 slides radially along rotating ring 32. Multiple inner top blocks 33 and outer pressure blocks 34 are arranged around the central axis of rotating ring 32.

[0029] The end face of the inner top block 33 facing the inner wall of the connector 1 is arc-shaped or V-shaped, etc. After it slides continuously towards the outer pressure block 34, it comes into contact with the inner wall of the hose. The end face of the outer pressure block 34 facing the inner top block 33 is arc-shaped. When the sample injection device is working, the tubing is inserted into connector 1. During insertion, the tubing is positioned between the inner top block 33 and the outer pressure block 34. When it is necessary to fix the tubing, the outer pressure block 34 is first adjusted. Multiple outer pressure blocks 34 arrayed around the central axis of the rotating ring 32 synchronously retract towards the central axis of the ring 32 until the outer pressure block 34 contacts the tubing. At this time, the transformer's drain valve is opened, and the oil sample enters connector 1 from the tubing. This drives multiple inner top blocks 33 to slide synchronously towards the outer pressure block 34 along the radial direction of the rotating ring 32, cooperating with the outer pressure block 34 to clamp the tubing. During this process, the rotating ring 32 rotates synchronously, and the inner top blocks 33 rotate around the central axis of the rotating ring 32, causing a circumferential change in the contact position between the inner top blocks 33 and the tubing, further enhancing the uniformity and stability of the clamping. When the oil sample stops flowing, the inner top blocks 33 lose the driving force of the oil sample, and the inner top blocks 33 no longer apply pressure to the tubing. Then, the outer pressure block 34 is adjusted to reset, and the clamping state of the tubing is released, allowing the operator to quickly remove or replace the tubing. The entire process does not require tools to disassemble the connector 1 or circulation tube 2. The clamping and release of the hose can be completed simply by adjusting the external pressure block 34. This effectively avoids problems such as component wear and seal failure caused by frequent disassembly of traditional sample injection devices, and greatly improves the efficiency of oil sample testing and the service life of the device.

[0030] like Figure 3 , Figure 5 and Figure 9 As shown, the non-disassembly module 3 also includes an adjustment mechanism 35, which has multiple adjustment mechanisms arrayed around the central axis of the connector 1; The adjusting mechanism 35 includes an adjusting ring 36, a helical gear 37, a transmission gear 38, a rotating gear 39, a gear frame 310, and a connecting rod 311; Adjusting ring 36 is sleeved on connector 1. Adjusting ring 36 and connector 1 are coaxial and rotatably connected. Helical gear 37 is rotatably connected to the outer wall of connector 1. One end of adjusting ring 36 meshes with helical gear 37. Gear frame 310 is fixedly connected to the outer wall of connector 1. Transmission gear 38 and rotating gear 39 are both rotatably connected to gear frame 310. Transmission gear 38 meshes with helical gear 37. Transmission gear 38 meshes with rotating gear 39. One end of rotating gear 39 passes through gear frame 310 and is hinged to connecting rod 311. Connecting rod 311 is hinged to outer pressure block 34. Outer pressure block 34 is slidably connected to gear frame 310. Outer pressure block 34 slides radially on gear frame 310 along rotating ring 32.

[0031] When clamping the hose, the operator manually twists the adjusting ring 36. The end of the adjusting ring 36 that meshes with the helical gear 37 drives the helical gear 37 to rotate synchronously. The helical gear 37 then drives the transmission gear 38 to rotate, and the transmission gear 38 further drives the rotating gear 39 to rotate. When the rotating gear 39 rotates, it drives the connecting rod 311, which is hinged to it, to rotate around its own rotation axis. This causes the connecting rod 311 to push or pull the outer pressure block 34, making the outer pressure block 34 move closer to or away from the central axis of the rotating ring 32, thereby clamping or releasing the outer wall of the hose.

[0032] like Figure 6 and Figure 7 As shown, multiple rollers 312 are arrayed on the outer circular end face of the inner top block 33. The multiple rollers 312 are rotatably connected to the inner top block 33, and the rotation axis of the multiple rollers 312 coincides with the central axis of the rotating ring 32.

[0033] When the oil sample enters the connector 1 and drives the rotating ring 32 to rotate, the rotating ring 32 drives the inner top block 33 to rotate. When the inner top block 33 and the outer pressure block 34 clamp the hose, the inner top block 33 continues to rotate. The roller 312 can convert the sliding friction between the inner top block 33 and the inner wall of the hose into rolling friction, effectively reducing the friction between the inner top block 33 and the inner wall of the hose and avoiding wear on the inner wall of the hose caused by continuous sliding friction. At the same time, during the rotation of the inner top block 33, the support position of the roller 312 on the inner wall of the hose changes continuously in the circumferential direction, making the pressure distribution of the inner top block 33 on the inner wall of the hose more uniform, preventing excessive or insufficient local pressure, which could lead to hose deformation and oil sample leakage.

[0034] like Figures 6 to 8 As shown, the non-disassembly module 3 also includes a rotating mechanism 313; The rotating mechanism 313 includes a defoaming plate 3131, a push-pull rod 3132, and a fixing rod 3133; The defoaming disc 3131 is located on the side of the rotating ring 32 away from the circulation pipe 2. The defoaming disc 3131 and the push-pull rod 3132 are hinged together. The push-pull rod 3132 and the inner top block 33 are partially hinged together inside the rotating ring 32. The fixing rod 3133 and the defoaming disc 3131 are fixedly connected. The central axis of the defoaming disc 3131 and the fixing rod 3133 coincides with the central axis of the rotating ring 32. The fixing rod 3133 passes through part of the mounting bracket 31. The mounting bracket 31 limits the fixing rod 3133 to slide only along the central axis of the rotating ring 32.

[0035] When the oil sample enters the connector 1 from the hose, it first impacts the defoaming disc 3131, pushing the defoaming disc 3131 and the fixing rod 3133 to slide along the central axis of the rotating ring 32 towards the circulation pipe 2. As the defoaming disc 3131 slides, it drives the inner top block 33 to slide radially outward along the rotating ring 32 towards the pressure block 34, thereby clamping the hose.

[0036] like Figures 6 to 8 As shown, a helical blade assembly 3134 is sleeved on the fixing rod 3133, and the helical blade assembly 3134 and the fixing rod 3133 are fixedly connected.

[0037] When the oil sample flows through the spiral blade assembly 3134, it drives the spiral blade assembly 3134 to rotate. After the spiral blade assembly 3134 rotates, it drives the fixed rod 3133 to slide along the central axis of the rotating ring 32 towards the circulation pipe 2, thereby driving the defoaming disc 3131 to slide, further increasing the pressure of the inner top block 33 on the inner wall of the hose. At the same time, the rotation of the spiral blade assembly 3134 also drives the fixed rod 3133 to rotate. When the fixed rod 3133 rotates, it drives the defoaming disc 3131 to rotate. The defoaming disc 3131 then drives the rotating ring 32 to rotate through the push-pull rod 3132 and the inner top block 33, so that the inner top block 33 can apply uniform circumferential pressure to the inner wall of the hose. In addition, when the spiral blade assembly 3134 rotates, under the action of centrifugal force, it can also gather bubbles with a density much smaller than that of the oil sample towards the central axis of the rotating ring 32, which makes it easier for the defoaming disc 3131 to break up the gathered bubbles.

[0038] like Figures 6 to 8 As shown, a positive magnet 3135 is fixedly installed on one end of the fixed rod 3133 away from the defoaming plate 3131, and a negative magnet 3136 is provided on the mounting bracket 31. The central axis of the positive magnet 3135 and the negative magnet 3136 coincides with the central axis of the rotating ring 32. Along the central axis of the rotating ring 32, the closer the positive magnet 3135 is to the negative magnet 3136, the stronger the repulsive force between the positive magnet 3135 and the negative magnet 3136.

[0039] When the sample injection device stops injecting the sample, the thrust generated by the oil sample flow disappears. Under the repulsive force between the positive magnet 3135 and the negative magnet 3136, the fixed rod 3133 is pushed to slide and reset in the direction away from the circulation tube 2. When the fixed rod 3133 resets, it drives the defoaming plate 3131 to move synchronously. The defoaming plate 3131 pulls the inner top block 33 radially away from the inner wall of the hose along the rotating ring 32 through the push-pull rod 3132. The pressure of the inner top block 33 on the hose is then released, making it easier for the operator to disassemble the hose.

[0040] like Figure 6 and Figure 7 As shown, the defoaming plate 3131 is provided with defoaming holes 3137.

[0041] The defoaming hole 3137 is a tapered through hole with a diameter at the end near the hose that is larger than that at the end away from the hose. When the oil sample carrying air bubbles impacts the defoaming plate 3131, the air bubbles enter the defoaming hole 3137 along with the oil sample. Under the contraction of the tapered channel, the air bubbles are squeezed and broken, effectively reducing the air bubble content in the oil sample and preventing air bubbles from entering the circulation pipe 2 and affecting the accuracy of subsequent detection.

[0042] like Figure 3 and Figure 5 As shown, a dust cover 314 is fitted onto the adjusting mechanism 35, and the dust cover 314 is fixedly connected to the outer wall of the connector 1.

[0043] The dust cover 314 can effectively prevent dust and impurities from entering the gear meshing part of the adjustment mechanism 35, avoiding problems such as the adjustment ring 36 not rotating smoothly or the gear wear being accelerated due to foreign objects getting stuck, thereby ensuring the adjustment accuracy and stability of the outer pressure block 34 and extending the service life of the adjustment mechanism 35.

[0044] like Figure 1 and Figure 2 As shown, the circulation pipe 2 consists of an oil inlet pipe 21 and an oil outlet pipe 22; The oil inlet pipe 21 and the oil outlet pipe 22 are connected by a pipeline. The connector 1 is fixedly connected to the inlet end of the oil inlet pipe 21. A solenoid valve 23 is installed between the outlet end of the oil inlet pipe 21 and the connection port between the oil inlet pipe 21 and the oil outlet pipe 22.

[0045] The outlet of the oil inlet pipe 21 is connected to the inlet of the detection device, the inlet of the oil outlet pipe 22 is connected to the outlet of the detection device, and the outlet of the oil outlet pipe 22 is connected to the oil sample inlet of the transformer. The solenoid valve 23 controls the flow rate of the oil sample entering the detection device, achieving micro-flow of the oil sample within the detection device and ensuring the accuracy of the test results. The oil inlet pipe 21 and the oil outlet pipe 22 are connected by a pipeline. Large-flow oil samples flow back into the transformer through this connecting pipeline, preventing the oil sample from remaining in the detection device for too long and causing compositional changes. This also ensures stable thrust on the spiral blade assembly 3134 and the defoaming disc 3131, maintaining continuous and uniform clamping of the hose by the inner top block 33.

[0046] like Figure 5 As shown, the radius of the arc-shaped end face of the inner top block 33 is greater than or equal to the radius of the inner wall of the connector 1; The radius of the arc-shaped end face of the outer pressure block 34 is less than or equal to the radius of the inner wall of the connector 1.

[0047] A rubber pad is provided on the arc-shaped end face of the outer pressure block 34. The curvature of the rubber pad is consistent with the curvature of the end face of the outer pressure block 34, that is, the end face radius is less than or equal to the inner wall radius of the connector 1. This ensures that when the connecting pipe diameter is smaller than the diameter of the connector 1, the rubber pad can tightly fit against the outer wall of the hose under the internal thrust of the inner top block 33, avoiding insufficient or excessive clamping. After the inner top block 33 is pushed by the push-pull rod 3132 and supported by the inner wall of the outer pressure block 34, the arc-shaped end face of the inner top block 33 undergoes a certain deformation, and the end face radius gradually approaches the inner wall radius of the hose. This ensures the adaptability and clamping stability of hoses of different diameters, effectively solving the problems of traditional metal pressure blocks easily damaging hoses and poor clamping sealing.

[0048] The working principle of this invention is as follows: When the sample injection device is working, the tubing is inserted into the connector 1. During insertion, the tubing is located between the inner top block 33 and the outer pressure block 34. When it is necessary to fix the tubing, the outer pressure block 34 is adjusted first. Multiple outer pressure blocks 34 arrayed around the central axis of the rotating ring 32 synchronously retract towards the central axis of the rotating ring 32 until the outer pressure block 34 contacts the tubing. At this time, the oil drain valve of the transformer is opened, and the oil sample enters the connector 1 from the tubing. This drives multiple inner top blocks 33 to slide synchronously towards the outer pressure block 34 along the radial direction of the rotating ring 32, cooperating with the outer pressure block 34 to clamp the tubing. During this process, the rotating ring 32 rotates synchronously, driving the inner top blocks 33 to rotate around the central axis of the rotating ring 32, causing the contact position between the inner top blocks 33 and the tubing to change circumferentially, further enhancing the uniformity and stability of clamping. Once the oil sample stops flowing, the inner top block 33 loses its driving force and no longer applies pressure to the hose. Then, the outer pressure block 34 is adjusted to reset, releasing the hose from its clamped state, allowing operators to quickly remove or replace it. The entire process requires no tools to disassemble the connector 1 or circulation tube 2; the hose clamping and releasing can be completed simply by adjusting the outer pressure block 34. This effectively avoids the problems of component wear and seal failure caused by frequent disassembly in traditional sample injection devices, significantly improving the efficiency of oil sample testing and extending the device's lifespan.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A non-disassembly, circulating transformer oil sample micro-flow injection device, the injection device comprising a connector (1) and a circulation tube (2), the connector (1) being disposed at the inlet of the circulation tube (2), characterized in that: The sample introduction device also includes a non-disassembly module (3); The non-removable module (3) includes a mounting bracket (31), a rotating ring (32), an inner top block (33), and an outer pressure block (34). The mounting bracket (31) is fixedly installed inside the connector (1). The rotating ring (32) and the mounting bracket (31) are rotatably connected. The rotation axis of the rotating ring (32) coincides with the central axis of the connector (1). The inner top block (33) is located between the rotating ring (32) and the outer pressure block (34). The inner top block (33) passes through the rotating ring (32) radially. The inner top block (33) and the rotating ring (32) are slidably connected. The inner top block (33) slides radially along the rotating ring (32). The outer pressure block (34) is slidably connected to one end of the connector (1). The outer pressure block (34) slides radially along the rotating ring (32). There are multiple inner top blocks (33) and outer pressure blocks (34) arranged around the central axis of the rotating ring (32).

2. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 1, characterized in that: The non-disassembly module (3) also includes an adjustment mechanism (35), which has multiple adjustment mechanisms (35) arranged around the central axis of the connector (1); The adjustment mechanism (35) includes an adjustment ring (36), a helical gear (37), a transmission gear (38), a rotating gear (39), a gear frame (310), and a connecting rod (311). The adjusting ring (36) is sleeved on the connector (1). The adjusting ring (36) and the connector (1) are coaxial. The adjusting ring (36) and the connector (1) are rotatably connected. The helical gear (37) is rotatably connected to the outer wall of the connector (1). One end of the adjusting ring (36) meshes with the helical gear (37). The gear frame (310) is fixedly connected to the outer wall of the connector (1). The transmission gear (38) and the rotating gear (39) are both connected to the gear frame (310). 0) Rotary connection, the transmission gear (38) and helical gear (37) mesh, the transmission gear (38) and rotating gear (39) mesh, one end of the rotating gear (39) passes through the gear frame (310) and the connecting rod (311) and is hinged, the connecting rod (311) and the outer pressure block (34) are hinged, the outer pressure block (34) and the gear frame (310) are slidably connected, and the outer pressure block (34) slides on the gear frame (310) along the radial direction of the rotating ring (32).

3. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 1, characterized in that: Multiple rollers (312) are arranged on the outer circular end face of the inner top block (33). The multiple rollers (312) are rotatably connected to the inner top block (33), and the rotation axis of the multiple rollers (312) coincides with the central axis of the rotating ring (32).

4. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 1, characterized in that: The non-disassembly module (3) also includes a rotating mechanism (313); The rotating mechanism (313) includes a defoaming disc (3131), a push-pull rod (3132), and a fixing rod (3133). The defoaming disc (3131) is located on the side of the rotating ring (32) away from the circulation pipe (2). The defoaming disc (3131) and the push-pull rod (3132) are hinged together. The push-pull rod (3132) and the inner top block (33) are partially hinged together inside the rotating ring (32). The fixing rod (3133) and the defoaming disc (3131) are fixedly connected. The central axis of the defoaming disc (3131) and the fixing rod (3133) coincides with the central axis of the rotating ring (32). The fixing rod (3133) passes through part of the mounting bracket (31). The mounting bracket (31) limits the fixing rod (3133) to slide only along the central axis of the rotating ring (32).

5. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 4, characterized in that: A helical blade assembly (3134) is sleeved on the fixing rod (3133), and the helical blade assembly (3134) and the fixing rod (3133) are fixedly connected.

6. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 5, characterized in that: A positive magnet (3135) is fixedly installed on the end of the fixed rod (3133) away from the defoaming plate (3131), and a negative magnet (3136) is provided on the mounting bracket (31). The central axis of the positive magnet (3135) and the negative magnet (3136) coincides with the central axis of the rotating ring (32). Along the central axis of the rotating ring (32), the closer the positive magnet (3135) is to the negative magnet (3136), the stronger the repulsive force between the positive magnet (3135) and the negative magnet (3136).

7. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 6, characterized in that: The defoaming plate (3131) is provided with defoaming holes (3137).

8. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 2, characterized in that: A dust cover (314) is fitted onto the adjustment mechanism (35), and the dust cover (314) is fixedly connected to the outer wall of the connector (1).

9. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 1, characterized in that: The circulation pipe (2) consists of an oil inlet pipe (21) and an oil outlet pipe (22); The inlet pipe (21) and the outlet pipe (22) are connected by a pipeline. The connector (1) is fixedly connected to the inlet end of the inlet pipe (21). A solenoid valve (23) is provided between the outlet end of the inlet pipe (21) and the connection port of the inlet pipe (21) and the outlet pipe (22).

10. The non-disassembly, circulating transformer oil sample micro-flow injection device according to claim 1, characterized in that: The radius of the arc-shaped end face of the inner top block (33) is greater than or equal to the radius of the inner wall of the connector (1); The radius of the arc-shaped end face of the outer pressure block (34) is less than or equal to the radius of the inner wall of the connector (1).

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