Gas-insulated switchgear with high sealing performance

Abstract

The invention relates to the technical field of electrical cabinets, and discloses a high-sealing-performance gas-filled cabinet which comprises a ring main unit body, a purity monitoring cylinder used for collecting the purity of insulating gas is installed on the side portion of the ring main unit body, a telescopic column is movably installed in the purity monitoring cylinder, and a detection probe is coaxially connected to one side of the telescopic column. A sensor module used for detecting the purity of the insulating gas is installed at the end of the detection probe, a sealing cover is installed at the end of the purity monitoring cylinder, a plurality of sealing pieces are rotationally installed on the sealing cover in a circumferential array mode, and when the telescopic column moves, the sealing pieces are opened and closed. According to the scheme, when gas is not collected, isolation between the gas net groove and the interior of the cabinet body is guaranteed, external gas is prevented from being mixed into the cabinet body, the detection accuracy is improved, and the purity of insulating gas in the cabinet body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical cabinets, in particular to an inflatable cabinet with high sealing performance. Background Art

[0002] In related technologies, the full name of the insulated cabinet is sulfur hexafluoride gas-insulated ring main unit (RMC). Its core feature is a fully insulated structure achieved through a sealed gas tank, combining compactness with high reliability. Sulfur hexafluoride gas has excellent insulating properties, with an insulation strength 2-3 times that of air in a uniform electric field.

[0003] During use, capacitors, resistors and other components in the cabinet come into contact with sulfur hexafluoride gas for a long time, and electrolysis reactions occur, generating impurity compounds such as sulfides and fluorides, which reduce the purity of the gas. Sulfur hexafluoride gas is considered unqualified if its purity is less than 97%. Increased impurities will weaken the molecules' ability to absorb electrons, significantly reducing the insulation strength and potentially causing partial discharge or breakdown. Therefore, current gas filling cabinets usually require regular gas sampling and purity testing. However, when sampling the gas, it is easy for outside air and moisture to enter the cabinet; therefore, this does not meet existing needs. To address this, we have proposed a highly sealed gas filling cabinet. Summary of the Invention

[0004] The present invention provides a highly sealed inflatable cabinet, which can ensure the isolation between the gas trap and the cabinet body when no gas is collected, preventing external gas from mixing into the cabinet body, thereby improving the accuracy of detection and the purity of the insulating gas in the cabinet body, and solving the problem mentioned in the above background technology that periodic gas collection inside the inflatable cabinet easily allows external air and moisture to enter the cabinet body.

[0005] In order to achieve the above-mentioned objectives, the present disclosure provides an inflatable cabinet with high sealing performance, including a ring network cabinet body, a purity monitoring cylinder for collecting the purity of insulating gas installed on the side of the ring network cabinet body, a telescopic column movably installed inside the purity monitoring cylinder, a detection probe coaxially connected to one side of the telescopic column, a sensor module for detecting the purity of insulating gas installed on the end of the detection probe, an encryption cover installed on the end of the encryption cover, a plurality of sealing plates rotatably installed in a circular array, and the sealing plates open and close when the telescopic column moves.

[0006] Optionally, a protective shell is installed at the end of the purity monitoring tube, a sealing ring shell is installed inside the purity monitoring tube, a gas mesh groove is provided at the end of the detection probe, the sensor module is installed in the gas mesh groove, and the sealing ring shell is slidably fitted with the detection probe.

[0007] Optionally, the encryption cover is configured as a circular hollow cover, a turntable is coaxially mounted on the encryption cover, a plurality of opening and closing sliding holes are provided in a circular array on the encryption cover, a polygonal slide is provided on the turntable, the number of side grooves of the polygonal slide corresponds to the number of the opening and closing sliding holes, a through hole is provided in the middle of the turntable, a sliding block is slidably mounted in each side groove of the polygonal slide, and the sealing sheet is mounted on the sliding block.

[0008] Optionally, a rotating shaft is installed on the other side of the sealing plate, and the rotating shaft is movably engaged with the adjacent opening and closing sliding hole. An opening and closing groove is provided on the side of the encryption cover, and a shifting post is slidably installed in the opening and closing groove. The shifting post is connected to the turntable, and a telescopic connecting arm is connected between the telescopic post and the shifting post.

[0009] Optionally, the telescopic connecting arm includes a storage head that is slidably inserted into the purity monitoring cylinder, a sliding arm is inserted into the storage head, one end of the sliding arm slides in contact with the side wall of the telescopic column, a connecting compression spring is installed between the other end of the sliding arm and the storage head, the other end of the storage head is in contact with the shifting column, and the end of the storage head adjacent to the shifting column is provided with a flat surface and a chamfered portion.

[0010] Optionally, a sliding rack is slidably installed inside the purity monitoring cylinder, a driving motor is fixedly installed on the surface of the protective shell, a power round seat is rotatably installed inside the telescopic column, the output shaft of the driving motor is connected to the center of the power round seat, a half gear ring is coaxially installed on the power round seat, the half gear ring is meshed with the sliding rack, a connecting block is installed on one end of the sliding rack adjacent to the telescopic column, and the connecting block is slidably fitted with the telescopic column.

[0011] Optionally, a reset spring for resetting is sleeved on the detection probe, and the reset spring is located between the telescopic column and the inner wall of the purity monitoring cylinder.

[0012] Optionally, a spiral disc groove is provided on the telescopic column, and a fixed cylinder is installed on the purity monitoring cylinder, and the fixed cylinder is slidably engaged with the spiral disc groove.

[0013] Through the above technical solution, the highly sealed inflatable cabinet provided by the present invention is used: by installing the purity monitoring tube inside the ring network cabinet, the purity of the sulfur hexafluoride gas in the inflatable cabinet can be automatically and regularly detected. Unlike the existing technology, the encryption cover, turntable, sealing plate and dial are combined into an opening and closing mechanism; specifically, when the detection probe moves outward, the telescopic column contacts the telescopic connecting arm, and the end of the storage head pushes the dial to move. The dial is first pushed by the chamfered part and then engages with the flat surface, thereby maintaining the position of the dial after triggering and keeping the sealing plate open. Therefore, in this solution, when gas is not collected, the gas mesh groove is ensured to be isolated from the cabinet body, preventing external gas from mixing into the cabinet body, thereby improving the accuracy of detection and the purity of the insulating gas in the cabinet.

[0014] Furthermore, through the sliding fit between the fixed cylinder and the spiral disc groove, the telescopic column extends and rotates at the same time, thereby achieving telescopic and rotating contact with the gas. In this way, the sensor module can more comprehensively contact the insulating gas in the cabinet, thereby improving the uniformity and representativeness of gas sampling.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the inflatable cabinet of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the purity monitoring cylinder, telescopic column and encryption cover of the present invention.

[0018] Figure 3 It is a schematic diagram of the explosion structure of the telescopic column and the sealing ring shell of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the purity monitoring cylinder of the present invention.

[0020] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the encryption cover of the present invention.

[0022] Figure 7 This is a front view structural diagram of the encryption cover of the present invention when it is closed.

[0023] Explanation of reference numerals: 10, ring network cabinet; 110, purity monitoring tube; 120, telescopic column; 130, detection probe; 140, gas mesh groove; 150, sealing ring shell; 160, return spring; 170, protective shell; 180, sensor module; 210, drive motor; 220, power round seat; 230, half gear ring; 240, sliding rack; 250, connecting block; 310, fixed Cylinder; 400, telescopic connecting arm; 410, sliding arm; 420, storage head; 421, chamfered portion; 422, flat surface; 430, connecting compression spring; 510, spiral disc groove; 610, encryption cover; 611, opening and closing groove; 620, turntable; 630, through hole; 640, polygonal slide; 650, opening and closing slide hole; 660, sealing plate; 670, sliding block; 680, rotating shaft; 690, shift column. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present disclosure more clearly understood, specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.

[0025] In the description of the present disclosure, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. The terms "first" and "second" are used to distinguish one element from another and do not have sequentiality or importance. In addition, when the following description refers to the drawings, the same figure marks in different drawings represent the same or similar elements, which are not repeated in this disclosure.

[0026] In this disclosure, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0027] According to some embodiments of the present disclosure, a highly sealed inflatable cabinet is provided, Figure 1-Figure 7 As shown in the figure, the highly sealed inflatable cabinet includes a ring network cabinet body 10, and a purity monitoring cylinder 110 for collecting the purity of the insulating gas is installed on the side of the ring network cabinet body 10. A telescopic column 120 is movably installed inside the purity monitoring cylinder 110, and a detection probe 130 is coaxially connected to one side of the telescopic column 120. A sensor module 180 for detecting the purity of the insulating gas is installed at the end of the detection probe 130, and an encryption cover 610 is installed at the end of the encryption cover 610. A plurality of sealing plates 660 are rotatably installed in a circular array. When the telescopic column 120 moves, the sealing plates 660 open and close.

[0028] During the specific configuration, a detection hole is opened in the ring network cabinet 10, the purity monitoring tube 110 is plugged into the detection hole, and a sealing ring is installed in the plug-in gap.

[0029] In addition, see Figure 4 A protective shell 170 is installed at the end of the purity monitoring tube 110, a sealing ring shell 150 is installed inside the purity monitoring tube 110, a gas mesh groove 140 is provided at the end of the detection probe 130, and the sensor module 180 is installed in the gas mesh groove 140. The sealing ring shell 150 and the detection probe 130 are slidably fitted to further isolate the inside of the purity monitoring tube 110 from the inside of the cabinet.

[0030] Furthermore, the encryption cover 610 is configured as a circular hollow cover, and a turntable 620 is coaxially mounted on the encryption cover 610. A plurality of opening and closing sliding holes 650 are provided in a circular array on the encryption cover 610. A polygonal slide 640 is provided on the turntable 620. The number of side grooves of the polygonal slide 640 corresponds to the number of opening and closing sliding holes 650. A through hole 630 is provided in the middle of the turntable 620. A sliding block 670 is slidably mounted in each side groove of the polygonal slide 640, and a sealing sheet 660 is mounted on the sliding block 670.

[0031] A rotating shaft 680 is installed on the other side of the sealing plate 660, and the rotating shaft 680 is movably engaged with the adjacent opening and closing sliding hole 650. An opening and closing groove 611 is opened on the side of the encryption cover 610, and a shift post 690 is slidably installed in the opening and closing groove 611. The shift post 690 is connected to the turntable 620, and a telescopic connecting arm 400 is connected between the telescopic column 120 and the shift post 690.

[0032] See Figure 5. The telescopic connecting arm 400 includes a storage head 420 that is slidably inserted into the purity monitoring tube 110. A sliding arm 410 is inserted into the storage head 420. One end of the sliding arm 410 slides and fits with the side wall of the telescopic column 120. A connecting compression spring 430 is installed between the other end of the sliding arm 410 and the storage head 420. The other end of the storage head 420 is in contact with the shifting column 690. The end of the storage head 420 adjacent to the shifting column 690 is provided with a flat surface 422 and a chamfered portion 421.

[0033] Specifically, a torsion spring (not shown) is installed between the rotating disk 620 and the encryption cover 610 to reset the rotating disk 620 and close the sealing plate 660. The opening and closing slide 650 pushes the rotating shaft 680 to move and rotate, while the sliding block 670 moves along the polygonal slide 640. Together, these forces rotate the sealing plate 660 and simultaneously centrifugally expand it.

[0034] In normal state, the chamfered portion 421 fits against the lever 690 and the sealing sheets 660 are closed; when the detection probe 130 is extended, the lever 690 slides against the chamfered portion 421 until the lever 690 engages with the flat surface 422, the sealing sheets 660 remain open, and the detection probe 130 passes through the through hole 630.

[0035] Through the above technical solution, the highly sealed inflatable cabinet provided by the present invention can be sealed when in use by setting the sealing ring shell 150 after the detection probe 130 is retracted, thereby ensuring the isolation of the insulating gas in the purity monitoring tube 110 cabinet; and, through the setting of the encryption cover 610, the turntable 620, the sealing plate 660 and the dial post 690, an opening and closing mechanism is combined. When the dial post 690 moves, the opening and closing sliding hole 650 pushes the rotating shaft 680, so that the rotating shaft 680 rotates while moving, and at the same time, the sliding block 670 moves along the polygonal slide groove 640, so that the sealing plate 660 rotates, thereby realizing that all the sealing plates 660 are centrifugally opened at the same time, so that the through hole 630 is unobstructed and the detection probe 130 can pass through. When the detection probe 130 is retracted, the sealing plate 660 closes, further separating the inside of the purity monitoring tube 110 from the inside of the cabinet.

[0036] When the detection probe 130 moves outward, the telescopic column 120 contacts the telescopic connecting arm 400, and the end of the storage head 420 pushes the shifting column 690 to move. The shifting column 690 is first pushed by the chamfered portion 421, and then engages with the flat surface 422, thereby maintaining the position of the shifting column 690 after triggering and keeping the sealing piece 660 open. Therefore, the dual design of the sealing ring shell 150 and the opening and closing mechanism of this scheme not only improves the reliability of detection, but also greatly enhances the sealing and accuracy during operation, thereby ensuring the purity of the insulating gas inside the inflatable cabinet.

[0037] It should be noted that the sensor module 180 in this solution is installed using a sensor based on the thermal conductivity measurement principle. This type of sensor is an existing technology, and its principle is based on the difference in thermal conductivity between sulfur hexafluoride gas and air: when the gas flows through the platinum thermistor wire, the resistance value changes with the concentration of sulfur hexafluoride gas, which is converted into an electrical signal through a Wheatstone bridge and linearized to output the purity value. Therefore, the gas purity inside the cabinet can be detected in a timely manner.

[0038] In addition, the sensor module 180 may also select other types of existing sensors according to actual conditions.

[0039] In some embodiments of the present disclosure, reference Figure 1-Figure 7 As shown in the figure, a sliding rack 240 is slidably installed inside the purity monitoring tube 110, a driving motor 210 is fixedly installed on the surface of the protective shell 170, a power round seat 220 is rotatably installed inside the telescopic column 120, the output shaft of the driving motor 210 is connected to the center of the power round seat 220, a half gear ring 230 is coaxially installed on the power round seat 220, the half gear ring 230 is engaged with the sliding rack 240, and a connecting block 250 is installed at one end of the sliding rack 240 adjacent to the telescopic column 120, and the connecting block 250 is slidably fitted with the telescopic column 120.

[0040] The detection probe 130 is sheathed with a return spring 160 for resetting. The return spring 160 is located between the telescopic column 120 and the inner wall of the purity monitoring cylinder 110. The telescopic column 120 is provided with a spiral groove 510, and the purity monitoring cylinder 110 is mounted with a fixed cylinder 310, which slides and engages with the spiral groove 510.

[0041] Through the above technical solution, when the highly sealed inflatable cabinet provided by the present invention is in use, the driving motor 210 is in operation, and the power round seat 220 drives the half gear ring 230 to rotate, so that the half gear ring 230 drives the sliding rack 240 to move, and the sliding rack 240 drives the telescopic column 120 to move, so that the detection probe 130 is extended out of the purity monitoring tube 110. Through the sliding cooperation between the fixed cylinder 310 and the spiral disk groove 510, the telescopic column 120 is extended and rotated at the same time, thereby realizing telescopic and rotational detection, so as to more comprehensively contact the insulating gas and improve the uniformity and representativeness of gas detection.

[0042] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0044] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A highly sealed inflatable cabinet, comprising a ring network cabinet (10), characterized in that: A purity monitoring cylinder (110) for collecting the purity of insulating gas is installed on the side of the ring network cabinet (10), a telescopic column (120) is movably installed inside the purity monitoring cylinder (110), a detection probe (130) is coaxially connected to one side of the telescopic column (120), and a sensor module (11) for detecting the purity of insulating gas is installed at the end of the detection probe (130), and a cryptographic cover (610) is installed at the end of the cryptographic cover (610), and a plurality of sealing sheets (660) are rotatably installed in a circular array on the upper surface of the cryptographic cover (610), and when the telescopic column (120) moves, the sealing sheets (660) open and close.

2. The highly sealed inflatable cabinet according to claim 1, characterized in that: A protective shell (170) is installed at the end of the purity monitoring tube (110), a sealing ring shell (150) is installed inside the purity monitoring tube (110), a gas mesh groove (140) is provided at the end of the detection probe (130), the sensor module (11) is installed in the gas mesh groove (140), and the sealing ring shell (150) and the detection probe (130) are slidably fitted.

3. The highly sealed inflatable cabinet according to claim 1, characterized in that: The encryption cover (610) is configured as a circular hollow cover. A turntable (620) is coaxially rotatably mounted on the encryption cover (610). A plurality of opening and closing sliding holes (650) are provided in a circumferential array on the encryption cover (610). A polygonal slide groove (640) is provided on the turntable (620). The number of side grooves of the polygonal slide groove (640) corresponds to the number of the opening and closing sliding holes (650). A through hole (630) is provided in the middle of the turntable (620). A sliding block (670) is slidably mounted in each side groove of the polygonal slide groove (640). The sealing sheet (660) is mounted on the sliding block (670).

4. The highly sealed inflatable cabinet according to claim 3, characterized in that: A rotating shaft (680) is installed on the other side of the sealing plate (660), and the rotating shaft (680) is movably engaged with the adjacent opening and closing sliding hole (650). An opening and closing groove (611) is opened on the side of the encryption cover (610), and a shifting post (690) is slidably installed in the opening and closing groove (611). The shifting post (690) is connected to the turntable (620), and a telescopic connecting arm (400) is connected between the telescopic post (120) and the shifting post (690).

5. The highly sealed inflatable cabinet according to claim 4, characterized in that: The telescopic connecting arm (400) includes a receiving head (420) that is slidably inserted into the purity monitoring cylinder (110), a sliding arm (410) is inserted into the receiving head (420), one end of the sliding arm (410) is slidably fitted with the side wall of the telescopic column (120), a connecting compression spring (430) is installed between the other end of the sliding arm (410) and the receiving head (420), the other end of the receiving head (420) is in contact with the shifting column (690), and the end of the receiving head (420) adjacent to the shifting column (690) is provided with a flat surface (422) and a chamfered portion (421).

6. The highly sealed inflatable cabinet according to claim 2, characterized in that: A sliding rack (240) is slidably mounted inside the purity monitoring tube (110), a driving motor (180) is fixedly mounted on the surface of the protective shell (170), a power round seat (220) is rotatably mounted inside the telescopic column (120), an output shaft of the driving motor (180) is connected to the center of the power round seat (220), a half gear ring (230) is coaxially mounted on the power round seat (220), the half gear ring (230) is meshed with the sliding rack (240), a connecting block (250) is mounted on one end of the sliding rack (240) adjacent to the telescopic column (120), and the connecting block (250) is slidably fitted with the telescopic column (120).

7. The highly sealed inflatable cabinet according to claim 1, characterized in that: A reset spring (160) for resetting is sleeved on the detection probe (130), and the reset spring (160) is located between the telescopic column (120) and the inner wall of the purity monitoring cylinder (110).

8. The highly sealed inflatable cabinet according to claim 1, characterized in that: A spiral disc groove (510) is provided on the telescopic column (120), and a fixed cylinder (310) is installed on the purity monitoring cylinder (110), wherein the fixed cylinder (310) is slidably engaged with the spiral disc groove (510).

Images