Dynamic seal transmission structure and combined electrical appliance inflatable cabinet

Abstract

The present invention discloses a dynamic seal transmission structure and a combined electrical appliance charging cabinet, and relates to the technical field of high-voltage power transmission equipment. It includes a cabinet isolation plate and a torsion transmission disk. The middle part of the torsion traditional disk is a vortex-shaped isolation pad made of soft elastic material; the outer circumference of the vortex-shaped isolation pad is sealed with a hard frame; the vortex-shaped isolation pad is folded in the radial direction to form a vortex-shaped gap; the vortex-shaped gap is used to accommodate the tensile deformation of the side wall when the vortex-shaped isolation pad rotates axially; a transmission member is axially penetrated in the middle part of the torsion traditional disk, and an operating knob is connected to one side of the transmission member; the transmission member is connected to a transmission coupling member on the other side of the cabinet isolation plate, and the transmission coupling member is rotated or pushed and pulled in linkage with the transmission mechanism inside the combined electrical appliance charging cabinet. The dynamic seal of the present invention has good air leakage prevention performance, long structural fatigue resistance life, and strong adaptability to environmental temperature and cleanliness.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to a dynamic sealing transmission structure and a combined electrical appliance charging cabinet. Background Art

[0002] Combined electrical inflatable cabinet is a kind of electrical equipment that seals all high-voltage components such as grounding switch, circuit breaker, and isolating switch in a gas box filled with SF6 gas, and installs the switch operating device, surface, instrument, and secondary components outside the sealed gas box. Combined electrical inflatable cabinet has the advantages of high technical content, small size, high stability, good safety for operators, and no influence from external environmental factors. It is widely used by switch equipment manufacturers at home and abroad.

[0003] The first thing to pay attention to in the inflatable cabinet product is the airtightness, because if leakage occurs, almost all product performance will not be guaranteed. To ensure the service life of ≥30 years, the annual leakage rate of the inflatable cabinet should be controlled below 0.5% / year. The sealing structure of the inflatable cabinet product mainly includes static sealing and dynamic sealing. The static sealing methods include welding sealing and sealing ring sealing. The dynamic sealing methods mainly include magnetic fluid sealing and metal bellows sealing.

[0004] Regarding dynamic seals, the core component is the dynamic seal transmission structure. Air leakage in the inflatable cabinet often occurs during the switch operation. The dynamic seal using metal bellows can achieve direct seal. The long-term compression and rebound deformation of the metal bellows can easily cause metal fatigue, resulting in cracks and seal failure. The dynamic seal using magnetic fluid can achieve rotary seal. Magnetic fluid seals require both stable temperature and clean environment, and their cost is also relatively high. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a dynamic sealing transmission structure in view of the above-mentioned technical deficiencies, which has good dynamic sealing anti-leakage performance, long structural fatigue resistance life, and strong adaptability to environmental temperature and cleanliness.

[0006] The technical solution adopted by the present invention is: to provide a dynamic sealing transmission structure for operation transmission between a combined electrical appliance inflatable cabinet and the outside of the cabinet;

[0007] The cabinet isolation plate is constructed to install the dynamic seal transmission structure and the gas insulation medium of the combined electrical appliance gas cabinet; the cabinet isolation plate is provided with a work station hole;

[0008] The torsion transmission disk is constructed to be sealed and installed at the workstation hole, the middle part of the torsion traditional disk is a vortex-shaped isolation pad made of soft elastic material; the outer circumference of the vortex-shaped isolation pad is sealed and connected with a hard frame; the vortex-shaped isolation pad is folded in the radial direction to form a vortex-shaped gap; the vortex-shaped gap is used to accommodate the tensile deformation of the side wall when the vortex-shaped isolation pad rotates axially; a transmission member is axially penetrated in the middle part of the torsion traditional disk, and the transmission member is connected to an operating knob on the side of the cabinet isolation plate relative to the outside of the combination electrical appliance charging cabinet; the transmission member is connected to a transmission coupling member on the side of the cabinet isolation plate relative to the inside of the combination electrical appliance charging cabinet, and the transmission coupling member is rotated or pushed and pulled in linkage with the transmission mechanism inside the combination electrical appliance charging cabinet;

[0009] The upper sealing shell is arranged on the upper end surface of the spiral-shaped isolation pad and is configured to provide a limit for the spiral-shaped isolation pad when it is subjected to the positive pressure in the combined electrical appliance charging cabinet;

[0010] The lower packaging shell is arranged on the upper end surface of the vortex-shaped isolation pad and is configured to provide a limit for the vortex-shaped isolation pad when it is subjected to the positive pressure of the external atmosphere.

[0011] The upper packaging shell and the lower packaging shell are both provided with through holes at their axis centers for the transmission parts to pass through.

[0012] Preferably, the upper packaging shell and the space between the lower packaging shell and the vortex-shaped isolation pad of the dynamic sealing transmission structure are filled with lubricating oil.

[0013] Preferably, the transmission coupling member of the dynamic seal transmission structure comprises a rotary transmission tube, and the side wall of the rotary transmission tube is symmetrically provided with limit key grooves.

[0014] Preferably, the transmission coupling of the dynamic sealing transmission structure includes a linear transmission tube; the side wall of the linear transmission tube is symmetrically provided with spiral grooves; a transmission rod is rotatably connected inside the linear transmission tube; the side wall of the transmission rod is symmetrically provided with pins; the pins are respectively slidably connected to the spiral grooves on the corresponding sides; the radial cross-section of the transmission rod on the side outside the linear traditional tube is polygonal; the lower sealing shell is fixed with a limiting sleeve; the limiting sleeve is coaxially arranged on the outside of the linear transmission tube, and the limiting sleeve is provided with a polygonal slideway that slides with the polygonal part of the transmission rod.

[0015] Preferably, the upper sealing shell of the dynamic sealing transmission structure is connected to the cabinet isolation plate by threaded fitting.

[0016] Preferably, an O-ring is installed on the upper end surface of the hard frame of the dynamic sealing transmission structure; the outer side surface of the hard frame is threadedly connected to the cabinet isolation plate and compresses the O-ring to seal; the lower packaging shell is threadedly connected to the inner side surface of the hard frame.

[0017] Preferably, the vortex-shaped isolation pad of the dynamic seal transmission structure is made of thermoplastic silicone rubber, and a vortex-shaped torsion spring skeleton is coated inside the vortex-shaped isolation pad.

[0018] The present invention also provides a combined electrical appliance gas charging cabinet, which comprises any of the dynamic sealing transmission structures described above. Compared with gas charging cabinets using traditional dynamic sealing structures, this combined electrical appliance gas charging cabinet has a better anti-leakage effect.

[0019] It is different from the existing dynamic sealing transmission structure technology, that is, it does not achieve direct-acting sealing through metal bellows, nor achieve rotary sealing through magnetic fluid seals, but achieves transmission on both sides of the cabinet isolation plate through a torsion transmission disk that can be axially twisted. The vortex isolation pad composed of soft elastic material will coil like a torsion spring when twisted, and its own elasticity will stretch and deform in the vortex gap; the soft elastic material is statically sealed to the cabinet isolation plate through a hard frame, so that the transmission and sealed isolation inside and outside the cabinet are achieved through the torsional movement of the vortex isolation pad in the plane, and the traditional dynamic seal is decomposed into elastic torsion and static sealing, with good sealing effect and relatively low structural cost. There is no metal fatigue caused by the tensile deformation caused by the torsion of the soft material, and the service life is longer, and the requirements for environmental temperature and cleanliness are lower.

[0020] The upper packaging shell and the lower packaging shell can limit the spiral isolation pad in the plane where it is located, and can provide the spiral isolation pad with supporting force on both sides of the cabinet isolation plate, so as to provide it with resistance to the positive pressure of SF6 gas and the vacuum negative pressure during quality inspection.

[0021] Other technical effects of the present invention will be clearly explained in the development of some embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic cross-sectional structure diagram of an embodiment of the present invention;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of another embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the combination of the vortex-shaped isolation pad and the vortex-shaped torsion spring skeleton coating.

[0025] In the figure, 1. cabinet isolation plate; 2. work station hole; 3. torsion transmission plate; 4. vortex-shaped isolation pad; 5. hard frame; 6. vortex-shaped gap; 7. operating knob; 8. transmission coupling; 9. upper packaging shell; 10. lower packaging shell; 11. through hole; 12. rotary transmission tube; 13. limit keyway; 14. linear transmission tube; 15. spiral through groove; 16. transmission rod; 17. pin shaft; 18. limit sleeve; 19. polygonal slide; 20. O-ring; 21. vortex-shaped torsion spring skeleton. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. For the sake of simplicity, the "cabinet" in this technical solution is the abbreviation of the combined electrical appliance charging cabinet. The combined electrical appliance charging cabinet in the present invention refers to a broadly defined combined electrical appliance charging cabinet that encapsulates at least two of the isolating switch, circuit breaker, and earthing switch.

[0027] like Figure 1 As shown, a dynamic sealing transmission structure is used for operating transmission between a combined electrical appliance inflatable cabinet and the outside of the cabinet; including

[0028] The cabinet isolation plate 1 is configured to install a dynamic seal transmission structure and encapsulate the gas insulation medium of the combined electrical appliance gas cabinet; the cabinet isolation plate 1 is provided with a work station hole 2;

[0029] The torsion transmission disk 3 is constructed to be sealed and installed at the workstation hole 2, and the middle part of the torsion traditional disk 3 is a vortex-shaped isolation pad 4 made of soft elastic material; the outer circumference of the vortex-shaped isolation pad 4 is sealed and connected with a hard frame 5; the vortex-shaped isolation pad 4 is folded in the radial direction to form a vortex-shaped gap 6; the vortex-shaped gap 6 is used to accommodate the tensile deformation of the side wall when the vortex-shaped isolation pad 4 rotates axially; a transmission member is axially penetrated in the middle part of the torsion traditional disk 3, and the transmission member is connected with an operating knob 7 on the side of the cabinet isolation plate 1 relative to the outside of the combination electrical appliance charging cabinet; the transmission member is connected with a transmission coupling member 8 on the side of the cabinet isolation plate 1 relative to the inside of the combination electrical appliance charging cabinet, and the transmission coupling member 8 is rotated or pushed and pulled in linkage with the transmission mechanism inside the combination electrical appliance charging cabinet;

[0030] The upper sealing shell 9 is arranged on the upper end surface of the spiral-shaped isolation pad 4 and is configured to provide a limit for the spiral-shaped isolation pad 4 when it is subjected to the positive pressure in the combined electrical appliance charging cabinet;

[0031] The lower packaging shell 10 is arranged on the upper end surface of the spiral-shaped isolation gasket 4 and is configured to provide a limit for the spiral-shaped isolation gasket 4 when it is subjected to the positive pressure of the external atmosphere.

[0032] The upper packaging shell 9 and the lower packaging shell 10 are both provided with through holes 11 at their axis centers for transmission parts to pass through.

[0033] The hard frame 9 can be fixedly connected to the cabinet isolation plate 1 by bonding, ultrasonic welding, threaded connection composite sealing ring, etc.; the hard frame 5 and the vortex-shaped isolation pad 4 are connected in one piece through a rubber encapsulation production process.

[0034] To further optimize this embodiment, lubricating oil is filled between the upper packaging shell 9 and the lower packaging shell 10 of the dynamic seal transmission structure and the vortex-shaped isolation pad 4. The lubricating oil can reduce the friction between the vortex-shaped isolation pad 4 and the upper packaging shell 9 and the lower packaging shell 10, thereby increasing the service life of the vortex-shaped isolation pad 4. It is worth noting that the lubricating oil is an inorganic lubricating oil, such as a fully synthetic fluorinated grease, which will not swell with the rubber-like soft elastic material.

[0035] To further optimize this embodiment, the transmission coupling member 8 of the dynamic seal transmission structure includes a rotary transmission tube 12, and the side wall of the rotary transmission tube 12 is symmetrically provided with limit key grooves 13; the rotary transmission tube 12 can realize the rotary dynamic seal transmission in the dynamic seal.

[0036] like Figure 2 As shown, different from the above-mentioned optimized embodiment, this embodiment is another scheme of the traditional coupling member 8, and the transmission coupling member 8 includes a linear transmission tube 14; the side wall of the linear transmission tube 14 is symmetrically provided with a spiral groove 15; the linear transmission tube 14 is rotatably connected with a transmission rod 16; the side wall of the transmission rod 16 is symmetrically provided with a pin 17; the pin 17 is respectively slidably connected to the spiral groove 15 on the corresponding side; the radial cross-section of the transmission rod 16 located on the outside of the linear traditional tube 14 is polygonal; the lower packaging shell 10 is fixed with a limiting sleeve 18; the limiting sleeve 18 is coaxially arranged on the outside of the linear transmission tube 18, and a polygonal slideway 19 is provided on the limiting sleeve 18 to slide with the polygonal part of the transmission rod 16. The linear transmission tube 14 and the transmission rod 16 change the rotation of the operating knob 7 into linear motion through the sliding cooperation between the pin 17 and the spiral groove 15, so as to realize the direct-acting seal transmission in the dynamic seal.

[0037] To further optimize the above embodiments, the upper sealing shell 9 of the dynamic sealing transmission structure is connected to the cabinet isolation plate 1 by threaded cooperation; an O-ring 20 is installed on the upper end face of the hard frame 5; the outer side surface of the hard frame 5 is threadedly connected to the cabinet isolation plate 1 and the O-ring 20 is pressed and sealed; the lower sealing shell 10 is threadedly connected to the inner side surface of the hard frame 5.

[0038] The upper packaging shell 9, the hard frame 5 and the lower packaging shell 10 are all connected to other components by threaded connection. This connection method is more flexible and more convenient for installation, detection and replacement.

[0039] like Figure 3As shown, the above embodiment is further optimized, the material of the vortex-shaped isolation pad 4 of the dynamic seal transmission structure is thermoplastic silicone rubber, and the interior thereof is coated with a vortex-shaped torsion spring skeleton 21. The vortex-shaped torsion spring skeleton 21 can give the vortex-shaped isolation pad 4 better support and resilience, and give a more uniform radial torsional tensile deformation when torsion, reducing the concentration of tensile deformation. Thermoplastic silicone rubber has excellent processing performance of injection molding and rubber coating process, and has the weather resistance and high elastic deformation recovery rate of silicone.

[0040] Embodiment 2: A combined electrical appliance charging cabinet, comprising the dynamic sealing transmission structure described in any of the above embodiments.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A dynamic seal transmission structure, used for operation transmission between a combined electrical inflatable cabinet and the outside of the cabinet; characterized in that: include The cabinet isolation plate is constructed to install the dynamic seal transmission structure and the gas insulation medium of the combined electrical appliance gas cabinet; the cabinet isolation plate is provided with a work station hole; The torsion transmission disc is constructed to be sealed and installed at the workstation hole, the middle part of the torsion transmission disc is a vortex-shaped isolation pad made of soft elastic material; the outer circumference of the vortex-shaped isolation pad is sealed and connected with a hard frame; the vortex-shaped isolation pad is folded in the radial direction to form a vortex-shaped gap; the vortex-shaped gap is used to accommodate the tensile deformation of the side wall when the vortex-shaped isolation pad rotates axially; a transmission member is axially penetrated in the middle part of the torsion transmission disc, and the transmission member is connected to an operating knob on a torsion side of the cabinet isolation plate relative to the outside of the combination electrical appliance charging cabinet; the transmission member is connected to a transmission coupling member on one side of the cabinet isolation plate relative to the inside of the combination electrical appliance charging cabinet, and the transmission coupling member is rotated or pushed and pulled in linkage with the transmission mechanism inside the combination electrical appliance charging cabinet; The upper sealing shell is arranged on the upper end surface of the spiral-shaped isolation pad and is configured to provide a limit for the spiral-shaped isolation pad when it is subjected to the positive pressure in the combined electrical appliance charging cabinet; The lower packaging shell is arranged on the upper end surface of the vortex-shaped isolation pad and is configured to provide a limit for the vortex-shaped isolation pad when it is subjected to the positive pressure of the external atmosphere; The upper packaging shell and the lower packaging shell are both provided with through holes at the axis centers for the transmission parts to pass through; The upper packaging shell, the lower packaging shell and the space between the vortex-shaped isolation pad are filled with lubricating oil; The transmission coupling comprises a linear transmission tube; the side wall of the linear transmission tube is symmetrically provided with spiral grooves; a transmission rod is rotatably connected inside the linear transmission tube; the side wall of the transmission rod is symmetrically provided with pins; the pins are respectively slidably connected to the spiral grooves on the corresponding sides; the radial cross-section of the side of the transmission rod located outside the linear traditional tube is polygonal; the lower packaging shell is fixed with a limiting sleeve; the limiting sleeve is coaxially arranged on the outside of the linear transmission tube, and a polygonal slideway is provided on the limiting sleeve for sliding cooperation with the polygonal part of the transmission rod.

2. The dynamic sealing transmission structure according to claim 1, characterized in that: The upper packaging shell is connected to the cabinet isolation plate through threaded fitting.

3. The dynamic sealing transmission structure according to claim 1, characterized in that: The upper end surface of the hard frame is installed with an O-ring; the outer side of the hard frame is threadedly connected to the cabinet isolation plate and the O-ring is pressed and sealed; the lower packaging shell is threadedly connected to the inner side of the hard frame.

4. The dynamic sealing transmission structure according to claim 1, characterized in that: The material of the vortex-shaped isolation pad is thermoplastic silicone rubber, and a vortex-shaped torsion spring skeleton is coated inside the vortex-shaped isolation pad.

5. A combined electrical appliance inflatable cabinet, characterized in that: It comprises a dynamic sealing transmission structure as described in any one of claims 1 to 4.

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