Digital gas relay based on double float ball structure

Abstract

The present invention relates to the field of relay technology, specifically a digital gas relay based on a double float structure; it comprises a shell and an inner core on the inner side of the shell; the arc-shaped outer wall of the shell is symmetrically fixed with a flange and an observation window; the upper end cover of the shell is closed with the upper cover; the inner core is fixedly connected to the lower surface of the upper cover; the upper surface of the upper cover is fixedly connected to a junction box and an exhaust component; the upper cover is composed of a round cover and a frame cover; a cover hole is provided at the center of the frame cover; the round cover is rotatably and sealedly connected in the cover hole; the junction box, exhaust component and inner core are all connected to the round cover; the present invention drives the inner core to rotate by rotating the round cover, so that operation and maintenance personnel can observe the status of internal components more comprehensively and without blind spots, and promptly discover situations such as slight displacement of the float and abnormal contact of the reed contact, which helps to accurately determine the cause and location of the fault, improve the efficiency and accuracy of fault detection, and provide strong support for timely repair of equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, in particular to a digital gas relay based on a double-float structure. Background Art

[0002] The digital gas relay, based on a double-float structure, is a critical protection device for monitoring the internal condition of transformers. By precisely monitoring oil level changes and internal gas generation, it provides real-time feedback on transformer operating conditions, providing crucial support for the stable operation of power systems. It is widely used in various power transformer systems, from power plants and substations to industrial enterprises and urban power grids. Gas relays are typically installed on the connecting pipe between the transformer and the oil conservator, directly contacting the transformer oil and constantly monitoring its internal conditions. With the continuous growth of electricity demand and the expansion of power grids, the safe and stable operation of transformers, as core equipment for power transmission and distribution, is crucial. With its advantages of high-precision monitoring and remote data transmission, digital gas relays can better meet the needs of intelligent operation and maintenance in modern power systems and have broad application prospects. In the construction of future smart grids, they will become a key device for automated transformer condition monitoring and intelligent fault warning.

[0003] This gas relay primarily relies on a dual-float structure to sense changes in the transformer's internal state. During normal operation, the transformer's oil level is relatively stable, and the float remains in a defined position. However, internal transformer faults, such as localized overheating or electrical discharge, decompose and generate gases, causing the oil level to fluctuate. At this point, the float rises or falls with the oil level, triggering the connected reed contact to operate. The reed contact converts the mechanical motion into an electrical signal, which is transmitted via a junction box to an external monitoring system, enabling fault alarm and signal transmission. Simultaneously, a digital sensor collects real-time data, including float position and frequency of operation, and performs digital processing and analysis, providing operators with more accurate information on the transformer's operating status.

[0004] The observation window in a gas relay is typically made of transparent material and mounted on the housing. This allows maintenance personnel to visually observe internal conditions such as the oil level and float status without disassembling the equipment, thereby providing a preliminary assessment of the equipment's operating status. However, a major drawback of current gas relays is the limited viewing angle of the observation window. While the observation window provides a limited view of internal conditions, its fixed position and limited viewing range create numerous blind spots. For example, subtle changes in the displacement of the dual floats on the inner core and the contact status of the reed contacts are difficult to fully and clearly observe. This can result in potential minor faults or component anomalies being missed during equipment inspections. When a minor fault occurs within the transformer, the minute movement of the float may not be accurately captured through the observation window, hindering early diagnosis and accurate troubleshooting, delaying repairs, and increasing the risk of equipment damage and potential operational hazards to the power system. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the present invention proposes a digital gas relay based on a double float structure. The present invention drives the inner core to rotate by rotating the round cover, so that operation and maintenance personnel can observe the status of internal components more comprehensively and without blind spots, and promptly discover subtle displacements of the float, abnormal contact of the reed contact, etc., which helps to accurately determine the cause and location of the fault, improve the efficiency and accuracy of fault detection, and provide strong support for timely repair of equipment.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the digital gas relay based on the double float structure described in the present invention includes a shell and an inner core inside the shell; the arc-shaped outer wall of the shell is symmetrically fixed with a flange and an observation window; the upper port cover of the shell is closed with the upper cover; the inner core is fixedly connected to the lower surface of the upper cover; the upper surface of the upper cover is fixedly connected to the junction box and the exhaust assembly; the upper cover is composed of a round cover and a frame cover; a cover hole is provided in the center of the frame cover; the round cover is rotatably sealed and connected in the cover hole; the junction box, the exhaust assembly and the inner core are all connected to the round cover; the frame cover is connected to the upper port of the shell by bolts.

[0007] Preferably, the center of the round cover is directly below and located at the lower end of the inner core, which is fixedly connected to the card seat; the lower surface of the card seat is fixedly connected to a square card block; the lower end of the card block is conical; a bottom hole is provided through the center of the bottom wall of the shell; the bottom hole is rotatably sealed and connected to the chassis; the upper surface of the chassis is provided with a square card slot aligned with the card block; the card block can be inserted into the card slot; the lower surface of the chassis is elastically slidably connected to the locking rod up and down; the locking rod is laterally fixedly connected to the locking plate at the lower end; locking blocks are evenly arranged on the lower surface of the shell around the bottom hole; the end of the locking plate is pulled into the gap between adjacent locking blocks by elastic force.

[0008] Preferably, a lower port of the bottom hole protrudes from the lower surface of the chassis; the locking piece is U-shaped; and a toggle gap is formed between the upper edge of the locking piece and the outer bottom wall of the shell.

[0009] The lock frame is fixedly connected to the bottom surface of the locking plate by a first spring, and the lock frame is fixedly connected to the bottom surface of the locking plate by a first spring.

[0010] Preferably, an extension groove is provided on the lower surface of the push block; the extension block is connected to the extension block through a sliding seal in the extension groove; a guide surface is provided on the end of the extension block away from the bottom of the extension groove and inclined toward the center of the shell; the bottom of the extension groove and the end of the push block close to the bottom of the push groove are connected through a second liquid hole.

[0011] Preferably, the push block is connected to the bottom of the push slot via a first tension spring; the extension block is connected to the bottom of the extension slot via a second tension spring; and the tension of the first tension spring obtained is smaller than the tension of the second tension spring.

[0012] Preferably, an upper annular groove is provided on the outer wall of the chassis; an air outlet pipe is fixedly connected to the upper position of the inner wall of the shell; the air outlet pipe is located directly above the lens and faces the lens; a first air hole is provided inside the shell; one end of the first air hole is connected to the air outlet pipe, and the other end is connected to the upper annular groove; the upper annular groove is connected to the upper cavity.

[0013] Preferably, the inner wall of the slot is movably connected to the anti-blocking block; and the anti-blocking block is connected to the bottom of the slot via a second spring.

[0014] Preferably, the anti-blocking block is provided with a one-way air outlet hole running through the top and bottom; the bottom of the card slot is connected with the upper cavity through a one-way air inlet hole; the anti-blocking block is slidably and sealedly connected to the inner wall of the card slot.

[0015] Preferably, the aperture of the first liquid hole at one end close to the lower cavity is larger than the aperture of the first liquid hole at one end close to the push groove.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention drives the inner core to rotate by rotating the round cover, allowing operation and maintenance personnel to observe the status of internal components more comprehensively without blind spots, and promptly discover subtle displacements of the float, abnormal contact of the reed contact, etc., which helps to accurately determine the cause and location of the fault, improve the efficiency and accuracy of fault detection, and provide strong support for timely repair of equipment.

[0018] 2. In the present invention, the end of the locking piece is inserted into the gap of the corresponding locking block as the locking piece moves upward, so that the inner core that has completed the rotation is locked and cannot rotate. On the one hand, the connection direction of the junction box and the exhaust component can be changed. On the other hand, the inner core that has completed the observation is more stable during the working process, and the stability of use is improved.

[0019] 3. The present invention uses a locking plate to drive the square plate to move downward in the square groove, so that the window door automatically flips open on the observation window while the inner core is unlocked and rotated. In addition, when the locking plate is released, the window door will automatically block the observation window while the inner core is rotated and locked, thereby facilitating the observation of operation and maintenance personnel while improving the stability of relay use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 It is a perspective view of the present invention;

[0022] Figure 2 It is the bottom structure position diagram of the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the inner core and the upper cover of the present invention;

[0024] Figure 4 is a three-dimensional diagram of the housing in the present invention;

[0025] Figure 5 is a cross-sectional view of the present invention;

[0026] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 yes Figure 5 Enlarged view of point B in the middle;

[0028] Figure 8 yes Figure 5 Enlarged view of point C in the middle.

[0029] In the figure: housing 1, flange 11, observation window 12, bottom hole 13, locking block 14, lens 15, push groove 16, first liquid hole 161, air outlet pipe 17, first air hole 171, inner core 2, card seat 21, card block 22, upper cover 3, junction box 31, exhaust assembly 32, round cover 33, frame cover 34, cover hole 35, bolt 36, chassis 4, card slot 41, square slot 42, upper cavity 43, lower cavity 44, lower annular groove 45, upper annular groove 46, one-way air inlet 47, square plate 5, locking rod 51, locking piece 52, toggle gap 53, first spring 54, window door 6, torsion spring 61, push block 7, extension groove 71, extension block 72, guide surface 73, second liquid hole 74, first tension spring 75, second tension spring 76, anti-blocking block 8, second spring 81, one-way air outlet 82. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1 to 8 As shown, the present invention includes the following embodiments:

[0032] Example 1: A digital gas relay based on a double float structure comprises a shell 1 and an inner core 2 on the inner side of the shell 1; the curved outer wall of the shell 1 is symmetrically fixed with a flange 11 and an observation window 12; the upper port cover of the shell 1 is closed with an upper cover 3; the inner core 2 is fixedly connected to the lower surface of the upper cover 3; the upper surface of the upper cover 3 is fixedly connected to a junction box 31 and an exhaust assembly 32; the upper cover 3 is composed of a round cover 33 and a frame cover 34; a cover hole 35 is provided at the center of the frame cover 34; the round cover 33 is rotatably sealed and connected in the cover hole 35; the junction box 31, the exhaust assembly 32 and the inner core 2 are all connected to the round cover 33; the frame cover 34 is connected to the upper port of the shell 1 by bolts 36.

[0033] After connecting the two symmetrical flanges 11 on the relay to the connecting pipes between the transformer body and the oil conservator, connecting the junction box 31 to the corresponding line, and connecting the exhaust component 32 to the corresponding exhaust hose, the relay starts working. When the relay is operating normally, the interior is filled with transformer oil, and the float is in an upward position; when a minor fault occurs inside the transformer, the gas generated by the decomposition of the transformer oil gathers in the air chamber above the relay, forcing the oil level to drop, and the float then drops to the liquid level position, and the magnet on it causes the reed contact to attract, connect the signal circuit, and send out an alarm signal; when a serious fault occurs inside the transformer, the pressure in the oil tank increases instantaneously, and there will be an oil surge, which will impact the baffle. When the baffle rotates to a certain limited position, the magnet on it causes The reed contact is energized, connecting the tripping circuit and directly cutting off the power supply to the transformer without prior alarm, thereby protecting the transformer; the operation and maintenance personnel will regularly observe the status of the inner core 2 inside the shell 1 through the observation window 12, such as the oil level inside the shell 1, the status of the float, some slight displacement changes of the double floats on the inner core 2, the contact status of the reed contact, etc.; during the observation period, one of the windows of the observation window 12 can be illuminated by light, and the operation and maintenance personnel will observe in the other observation window 12. During the observation process, the round cover 33 is rotated, and the rotation of the round cover 33 will drive the inner core 2 to rotate, thereby changing the position of the parts on the inner core 2 close to the observation window 12, so that the operation and maintenance personnel can observe without blind spots. The air pipes on the gas assembly 32 are flexible and deformable, so they can rotate with the rotation of the round cover 33 without affecting the rotation of the round cover 33; the shell 1 in the relay serves as the outer shell of the gas relay, which protects the internal structure. It is usually made of metal and has good sealing and mechanical strength, and can withstand the influence of the oil pressure inside the transformer and external environmental factors; the junction box 31 in the relay is used to connect the external circuit to realize the signal transmission between the gas relay and the monitoring system. It contains electrical connection components to ensure stable and reliable signal transmission, and at the same time has certain protection performance to prevent interference from external factors; the observation window 12 in the relay: It is generally made of transparent material and installed on the shell 1, which is convenient for operation and maintenance personnel to see the signal without disassembling the equipment. When the equipment is in good condition, visually observe the internal oil level, float status, etc., so as to preliminarily judge the operating status of the equipment; the exhaust device in the relay: used to discharge the gas generated by the fault inside the transformer to ensure the normal operation of the gas relay. It is usually designed with a specific valve structure, which can automatically open the exhaust when the gas accumulates to a certain level, and ensure good sealing after exhaust; the inner core 2 in the relay is the core component, which includes a double float, a reed contact and a digital sensor; the double float is the component that directly senses the change of oil level, and triggers the action of the reed contact by its up and down floating; the reed contact is used as a signal conversion element to convert the mechanical action of the float into an electrical signal; the digital sensor is responsible for collecting and processing various data information to realize the intelligent monitoring function;

[0034] The present invention drives the inner core 2 to rotate by rotating the round cover 33, so that the operation and maintenance personnel can observe the status of the internal components more comprehensively without blind spots, and promptly discover the slight displacement of the float, abnormal contact of the reed contact, etc., which helps to accurately determine the cause and location of the fault, improve the efficiency and accuracy of fault detection, and provide strong support for timely repair of equipment.

[0035] Embodiment 2: The center of the round cover 33 is directly below and located at the lower end of the inner core 2, and is fixedly connected to the card seat 21; the lower surface of the card seat 21 is fixedly connected to the square card block 22; the lower end of the card block 22 is conical; a bottom hole 13 is provided through the center of the bottom wall of the shell 1; the bottom hole 13 is rotatably and sealedly connected to the chassis 4; the upper surface of the chassis 4 is provided with a square card groove 41 aligned with the card block 22; the card block 22 can be inserted into the card groove 41; the lower surface of the chassis 4 is elastically slidably connected to the locking rod 51 up and down; the locking rod 51 is laterally fixedly connected to the locking piece 52 at the lower end; the lower surface of the shell 1 is evenly provided with locking blocks 14 around the bottom hole 13; the end of the locking piece 52 is pulled into the gap between adjacent locking blocks 14 by elastic force.

[0036] In this embodiment, the lower surface of the chassis 4 protrudes a lower end of the bottom hole 13 ; the locking piece 52 is U-shaped; and a shifting gap 53 is formed between the upper edge of the locking piece 52 and the outer bottom wall of the housing 1 .

[0037] After the inner core 2 is connected to the round cover 33 in the upper cover 3, the inner core 2 on the lower surface of the upper cover 3 is inserted into the inner side of the shell 1. The inner core 2 will drive the card seat 21 and the card block 22 to approach the card slot 41. The cross sections of the card slot 41 and the card block 22 are both square. The card block 22 is smoothly inserted into the card slot 41 under the guidance of the cone end of the card block 22 at the lower end, completing the connection between the card block 22 and the card slot 41. Then, the frame cover 34 is rotated so that the mounting hole on the frame cover 34 is aligned with the mounting hole of the upper port of the shell 1. The frame cover 34 is sealed and connected to the upper port of the shell 1 by bolts 36. Then, after the two symmetrical flanges 11 in the relay are connected and installed, the lock piece 52 is grabbed from the toggle gap 53 and moved downward. Due to the formation of the toggle gap 53, the lock piece 52 is better to be toggled. After being toggled, the lock piece 52 will move downward, and the end of the lock piece 52 will move out from the gap between the adjacent lock block 14 as the lock piece 52 moves downward, thereby unlocking the lock piece 52 and the lock rod 51.

[0038] When the locking rod 51 is unlocked, the chassis 4 is unlocked. After the chassis 4 is unlocked, it can rotate with the rotation of the locking piece 52. During the rotation of the chassis 4, the slot 41 on the upper surface is driven to rotate. During the rotation of the slot 41, the block 22 is driven to rotate. During the rotation of the block 22, the base 21 and the inner core 2 are driven to rotate. During the rotation of the inner core 2, the round cover 33 in the upper cover 3 is driven to rotate. During the rotation of the round cover 33, the junction box 31 and the exhaust component 32 are driven to rotate, thereby changing the wiring position of the junction box 31 and the pipe connection direction of the exhaust component 32, thereby meeting a variety of installation environments and improving the applicability of the relay. After completing the wiring or connection direction adjustment of the junction box 31 and the exhaust component 32, the locking piece 52 is released, and the locking piece 52 and the locking rod 51 will move upward under the push of the elastic force, and the end of the locking piece 52 will be re-locked after the locking piece 52 moves upward. When the locking plate 52 is released, the locking plate 52 and the chassis 4 are locked, so that the inner core 2, the round cover 33, the terminal box 31 and the exhaust assembly 32 cannot rotate, thereby ensuring the working stability of the inner core 2, the terminal box 31 and the exhaust assembly 32. When the maintenance personnel observe the inner core 2 through the observation window 12, the maintenance personnel will toggle the locking plate 52 downward, and the end of the locking plate 52 will move out of the gap of the locking block 14 as the locking plate 52 moves downward, so that the chassis 4 can be rotated after being unlocked. The rotation of the chassis 4 will drive the inner core 2 to rotate in the shell 1, so that all parts of the inner core 2 can be observed through the observation window 12 without blind spots. After the inspection of the inner core 2 is completed, loosening the locking plate 52 will cause the locking plate 52 to move upward under the action of the elastic force. After the locking plate 52 moves upward, the chassis 4 and the inner core 2 are locked and cannot rotate, so that the inner core 2 will not rotate during operation.

[0039] In this embodiment, the end of the locking piece 52 is moved upward and locked into the gap of the corresponding locking block 14, so that the inner core 2 that has completed the rotation is locked and cannot rotate. On the one hand, the connection direction of the terminal box 31 and the exhaust component 32 can be changed. On the other hand, the inner core 2 after the observation is completed is more stable during the operation, and the stability of use is improved.

[0040] Embodiment 3: A square groove 42 is provided inside the chassis 4 and directly below the card slot 41; the square groove 42 is slidably and sealedly connected to a square plate 5 in an up-and-down manner; the lower surface of the square plate 5 is connected to the lower inner wall of the square groove 42 via a first spring 54; the square plate 5 divides the square groove 42 into an upper cavity 43 and a lower cavity 44; the upper end of the locking rod 51 is fixedly connected to the lower surface of the square plate 5; the lower end of the locking rod 51 passes through the chassis 4 and extends to the bottom of the chassis 4; the locking rod 51 is slidably and sealedly connected to the chassis 4; the upper cavity 43 is communicated with the inner side of the shell 1; The first spring 54 is sleeved on the outer wall of the locking rod 51; the inner edge of the observation window 12 is fixedly connected to the transparent lens 15; the outer side of the observation window 12 is hinged to the window door 6 by a torsion spring 61; the outer wall of the observation window 12 is blocked by the window door 6 and is provided with a push groove 16 near the torsion spring 61; the push block 7 is connected to the sliding seal in the push groove 16; the outer wall of the chassis 4 is provided with a lower annular groove 45; the bottom of the lower annular groove 45 is connected to the lower cavity 44; the bottom of the push groove 16 is connected to the lower annular groove 45 through the first liquid hole 161; the lower cavity 44 is filled with a liquid medium.

[0041] In this embodiment, an extension groove 71 is provided on the lower surface of the push block 7; an extension block 72 is connected to the extension groove 71 in a sliding seal; a guide surface 73 is provided on the end of the extension block 72 away from the bottom of the extension groove 71 and inclined toward the center of the shell 1; the bottom of the extension groove 71 and the end of the push block 7 close to the bottom of the push groove 16 are connected through a second liquid hole 74.

[0042] In this embodiment, the push block 7 is connected to the bottom of the push slot 16 through a first tension spring 75; the extension block 72 is connected to the bottom of the extension slot 71 through a second tension spring 76; the resulting tension of the first tension spring 75 is smaller than the tension of the second tension spring 76.

[0043] When it is necessary to control the inner core 2 and the round cover 33 to be unlocked and rotated, the operation and maintenance personnel will toggle the lock piece 52 downward. During the downward movement of the lock piece 52, the lock rod 51 will be driven downward. During the downward movement of the lock rod 51, the square plate 5 will be driven to slide and move downward in the square groove 42. During the downward movement of the square plate 5, the elastic force of the first spring 54 needs to be overcome. During the downward movement of the square plate 5, the space in the upper chamber 43 will become larger, and the space in the lower chamber 44 will become smaller. The liquid medium in the lower chamber 44 will be pressurized and will enter along the lower annular groove 45 and the first liquid hole 161 to In the push groove 16, when the liquid medium in the push groove 16 increases, it will flow into the extension groove 71 along the second liquid hole 74. Since the tension of the first tension spring 75 is less than the tension of the second tension spring 76, the push block 7 is pushed before the extension block 72 extends out of the extension groove 71. The push block 7 will slide along the groove wall of the push groove 16 while moving away from the groove bottom of the push groove 16. In the process of extending from the push groove 16, the push block 7 will push the window door 6. In the process of being pushed, the window door 6 will overcome the torsion force of the torsion spring 61 and flip, so that the window door 6 of the observation window 12 will be gradually pushed open.

[0044] When the locking cam 72 is in the unlocked position, the locking cam 73 is in the unlocked position, and the locking cam 73 is in the unlocked position, so that the locking cam 73 is unlocked and the winch 6 is unlocked. The greater the resistance of the push block 7 to the window door 6, the greater the resistance of the lock plate 52 to move downward. In order to reduce the resistance of the lock plate 52 to move downward, an extension block 72 is provided, so that the window door 6 is opened in two sections, so that the force required to open the window door 6 is small, which better meets the use requirements. After the lock plate 52 moves downward, on the one hand, the chassis 4 is unlocked, and on the other hand, the window doors 6 on the two observation windows 12 are opened automatically. Then, the lock plate 52 is rotated to drive the lock rod 51 to rotate. During the rotation of the lock rod 51, the square plate 5 is rotated, and during the rotation of the square plate 5, the chassis 4 is rotated. During the rotation of the chassis 4, the block 22 in the card slot 41 is rotated. The rotation of the block 22 drives the card seat 21 and the inner core 2 to rotate, so that the rotation of the inner core 2 can be observed through the lens 15 in the observation window 12, so that the inner core 2 can be observed without blind spots.

[0045] After the observation of the inner core 2 is completed, the locking piece 52 is released, and the first spring 54 will push the square plate 5 to move upward. During the upward movement of the square plate 5, the locking rod 51 will be driven upward. During the upward movement of the locking rod 51, the locking piece 52 will be driven upward. The end of the locking piece 52 will be stuck in the gap of the locking block 14, completing the locking of the locking piece 52, so that the chassis 4 cannot drive the inner core 2 to rotate after being locked. After the square plate 5 moves upward, the space in the lower cavity 44 becomes larger to form a negative pressure, and the liquid in the extension groove 71 will enter the push groove 16. The medium in the push groove 16 will flow back into the lower cavity 44, and the extension block 72 will retract and extend. When the locking plate 52 is released, the window door 6 will automatically block the observation window 12 and the inner core 2 will be locked.

[0046] Example 4: The outer wall of the chassis 4 is provided with an upper annular groove 46; the upper position of the inner wall of the shell 1 is fixedly connected to the air outlet pipe 17; the air outlet pipe 17 is located directly above the lens 15 and faces the lens 15; a first air hole 171 is provided inside the shell 1; one end of the first air hole 171 is connected to the air outlet pipe 17, and the other end is connected to the upper annular groove 46; the upper annular groove 46 is connected to the upper cavity 43.

[0047] When the operation and maintenance personnel find that there are impurities such as dirt on the inside of the lens 15 blocking the line of sight, they control the locking piece 52 to move up and down in a cycle. During the up and down movement of the locking piece 52, the locking rod 51 and the square plate 5 will be driven to move back and forth. The square plate 5 will cause the volume of the upper cavity 43 to change during the up and down movement in the square groove 42. During the downward movement of the square plate 5, the volume of the upper cavity 43 will increase to form a negative pressure. The air outlet pipe 17 will suck in the gas medium or liquid medium at the upper position of the inner side of the shell 1, and the medium will enter the upper cavity 43 along the first air hole 171. As the square plate 5 moves upward, the medium in the upper cavity 43 is pressurized and discharged along the liquid hole and the air outlet pipe 17. The air outlet pipe 17 is directed toward the inner wall of the lens 15, thereby impacting the impurities attached to the inner wall of the lens 15, so that the inner wall of the lens 15 is cleaned to meet the observation requirements. The cleaned dirt will be deposited on the inner bottom wall of the shell 1.

[0048] Example 5: The inner wall of the slot 41 is movably connected to the anti-blocking block 8 ; the anti-blocking block 8 is connected to the bottom of the slot 41 via a second spring 81 .

[0049] In this embodiment, the anti-blocking block 8 is provided with a one-way air outlet 82 running through the top and bottom; the bottom of the slot 41 is connected to the upper cavity 43 through a one-way air inlet 47; the anti-blocking block 8 is in sliding and sealing connection with the inner wall of the slot 41.

[0050] When the maintenance personnel pull out the faulty inner core 2 from the shell 1, the block 22 will move out of the slot 41, and the anti-blocking block 8 will move up and down as the second spring 81 pushes it, so that the upper surface of the anti-blocking block 8 is flush with the upper surface of the chassis 4. This prevents impurities on the bottom wall of the shell 1 from entering the slot 41 after long-term use, causing the block 22 to enter the slot 41 for the second time and become blocked. In the process of the anti-blocking block 8 moving away from the bottom of the slot 41, the medium in the upper cavity 43 will enter the slot 41 along the one-way air inlet 47; after the inner core 2 completes the repair and drives the block 22 to enter the slot 41 again, the block 22 will push the anti-blocking block 8 into the slot 41, and the anti-blocking block 8 will squeeze the medium in the slot 41, so that the medium in the slot 41 is discharged along the one-way air outlet 82, thereby allowing impurities to be washed away from the upper end of the slot 41, to ensure that the block 22 can smoothly enter the slot 41 for the second time.

[0051] Example 6: The diameter of the first liquid hole 161 near the lower chamber 44 is larger than the diameter of the first liquid hole 161 near the push groove 16. By limiting the diameter of the first liquid hole 161, the medium in the lower chamber 44 can quickly enter the push groove 16 along the first liquid hole 161 and push the push block 7. As the push block 7 retracts into the push groove 16, the medium slowly flows back into the lower chamber 44 along the first liquid hole 161. This allows the window door 6 to close slowly, preventing the window door 6 from closing too quickly and causing damage to the observation window 12.

[0052] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital gas relay based on a double-float structure, comprising a housing and an inner core within the housing; a flange and an observation window are symmetrically fixedly connected to the curved outer wall of the housing; an upper cover is provided on the upper end of the housing; the inner core is fixedly connected to the lower surface of the upper cover; and a junction box and an exhaust assembly are fixedly connected to the upper surface of the upper cover. Characteristically, The upper cover is composed of a round cover and a frame cover; a cover hole is provided in the center of the frame cover; the round cover is rotatably and sealedly connected to the cover hole; the junction box, exhaust assembly and inner core are all connected to the round cover; the frame cover is connected to the upper port of the shell by bolts; The center of the circular cover is directly below and is located at the lower end of the inner core, and is fixedly connected to the card seat; the lower surface of the card seat is fixedly connected to the square card block; the center of the bottom wall of the shell is provided with a bottom hole running through the upper and lower parts; the bottom hole is rotatably and sealedly connected to the chassis; the upper surface of the chassis is provided with a square card groove aligned with the card block; the lower surface of the chassis is elastically slidably connected to the locking rod; the lower end of the locking rod is transversely fixedly connected to the locking plate; the lower surface of the shell is evenly provided with locking blocks around the bottom hole; the ends of the locking plates are clamped into the gaps between adjacent locking blocks under the pull of elastic force; A square groove is provided inside the chassis and directly below the card slot; a square plate is elastically and sealingly connected up and down in the square groove; the square plate divides the square groove into an upper cavity and a lower cavity; the upper end of the locking rod is fixedly connected to the lower surface of the square plate; the lower end of the locking rod passes through the chassis and extends to the bottom of the chassis; the locking rod is slidingly and sealingly connected to the chassis; the upper cavity is connected to the inner side of the shell; the inner edge of the observation window is fixedly connected to a transparent lens; the lower position of the outer side of the observation window is hinged to the window door by a torsion spring; a push groove is provided at a position where the outer wall of the observation window is blocked by the window door and close to the torsion spring; a push block is slidingly and sealingly connected in the push groove; a lower ring groove is provided on the outer wall of the chassis; the bottom of the lower ring groove is connected to the lower cavity; the bottom of the push groove is connected to the lower ring groove through a first liquid hole; An extension groove is provided on the lower surface of the push block; the extension groove is slidingly and sealingly connected to the extension block; the bottom of the extension groove is connected to an end of the push block near the bottom of the groove through a second liquid hole; The push block is connected to the bottom of the push slot via a first tension spring; the extension block is connected to the bottom of the extension slot via a second tension spring; and the tension of the first tension spring obtained is smaller than the tension of the second tension spring.

2. The digital gas relay based on the double float structure according to claim 1 is characterized in that: The lower surface of the chassis protrudes a lower end port of the bottom hole; the locking piece is U-shaped; and a toggle gap is formed between the upper edge of the locking piece and the outer bottom wall of the shell.

3. The digital gas relay based on the double float structure according to claim 1 is characterized in that: An upper annular groove is provided on the outer wall of the chassis; an air outlet pipe is fixedly connected to the upper position of the inner wall of the shell; the air outlet pipe is located directly above the lens and faces the lens; a first air hole is provided inside the shell; one end of the first air hole is connected to the air outlet pipe, and the other end is connected to the upper annular groove; the upper annular groove is connected to the upper cavity.

4. The digital gas relay based on a double float structure according to claim 1 is characterized in that: The inner wall of the card slot is movably connected to the anti-blocking block; the anti-blocking block is connected to the bottom of the card slot via a second spring.

5. The digital gas relay based on the double float structure according to claim 4 is characterized in that: The anti-blocking block is provided with a one-way air outlet hole running through the upper and lower parts; the bottom of the card slot is communicated with the upper cavity through a one-way air inlet hole; the anti-blocking block is slidably and sealedly connected to the inner wall of the card slot.

6. The digital gas relay based on a double float structure according to claim 1 is characterized in that: The aperture of the first liquid hole at one end close to the lower cavity is larger than the aperture of the first liquid hole at one end close to the push groove.

Images