Portable single phase air bypass switch

Abstract

The present invention relates to a portable single-phase air bypass switch, including an outer shell assembly, an energy storage mechanism, a switch-on and switch-off operating mechanism, a switch-on and switch-off indicating mechanism, a switch-on locking mechanism, a switch-off locking mechanism and a vacuum arc extinguishing chamber. The outer shell assembly includes a sleeve and an end cover located at one end of the sleeve. The energy storage mechanism is arranged on the end cover. The switch-on and switch-off operating mechanism includes a static contact and a moving contact located in the sleeve, and a moving contact action assembly for realizing switch-on or switch-off. A switch-on locking mechanism and a switch-off locking mechanism are respectively arranged on both sides of the upper part of the sleeve, and a vacuum arc extinguishing chamber is arranged in the lower part of the sleeve. The present invention has a miniaturized design, a compact structure, convenient equipment connection and light operation; a vacuum arc extinguishing chamber is adopted, and the arc extinguishing process is completely completed in the ceramic shell, which completely solves the problem of arc burning; the energy storage mechanism adopts a cam mechanism, which is labor-saving to operate; the moving contact action assembly has a compact structure and saves installation space.

Description

Technical Field

[0001] The invention relates to a medium and low voltage switch assembly, in particular to a portable single-phase air bypass switch. Background Art

[0002] With the large-scale expansion of cities and the widespread use of power cables, there are more and more overhead and power cable hybrid lines, and the distribution network has an increasing demand for 40.5kV portable single-phase air bypass switchgear. At present, arc extinguishing equipment professionally used for 40.5kV distribution network live work is very scarce, and no company in China or even in the world has developed similar products. In order to adapt to the development of distribution networks and expand the application of distribution network live work technology in overhead hybrid lines, it is urgently necessary to develop 40.5kV distribution network live work dedicated arc extinguishing equipment that can open and close large capacitive currents, that is, 40.5kV portable single-phase air bypass switch for distribution network live work. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a portable single-phase air bypass switch.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a portable single-phase air bypass switch, including an outer shell assembly, an energy storage mechanism, an opening and closing operating mechanism, an opening and closing indicating mechanism, a closing locking mechanism, an opening locking mechanism and a vacuum arc extinguishing chamber, the outer shell assembly includes a sleeve and an end cover located at one end of the sleeve, the energy storage mechanism is arranged on the end cover, the opening and closing operating mechanism includes a static contact, a moving contact and a moving contact action assembly for realizing opening or closing located in the sleeve, the closing locking mechanism and the opening locking mechanism are respectively arranged on both sides of the upper part of the sleeve, and a vacuum arc extinguishing chamber is arranged in the lower part of the sleeve.

[0005] The non-conductive energy storage mechanism is arranged on the end cover, and the opening and closing operating mechanism of the conductive part is arranged in the sleeve, which simplifies the installation and ensures safety.

[0006] It is further defined that the vacuum arc extinguishing chamber includes a ceramic shell and a static conductive rod, a contact system, a main shielding cover, a bellows, a guide sleeve and a moving conductive rod located in the ceramic shell, the upper part of the static conductive rod extends out of the ceramic shell, and a static contact is provided on the top of the static conductive rod, a main shielding cover is provided outside the contact system, the contact system includes an arc extinguishing chamber static contact connected to the lower end of the static conductive rod and an arc extinguishing chamber moving contact located at the upper end of the moving conductive rod, the lower part of the moving conductive rod extends out of the vacuum arc extinguishing chamber, and a guide sleeve is provided at the connection between the two, a bellows is provided outside the upper part of the moving conductive rod, and a bellows shielding cover is provided at the upper end of the bellows.

[0007] It is further defined that a switch-off energy storage spring is arranged outside the upper part of the static conductive rod extending out of the ceramic shell, and a hook-shaped groove is arranged at the lower end of the dynamic conductive rod, and a cover is arranged on the end thereof.

[0008] When the line is conducting (closing state), the moving contact of the arc extinguishing chamber and the static contact of the arc extinguishing chamber are closed, and the moving contact compresses the opening energy storage spring to give enough pressure to the static contact, so that the vacuum arc extinguishing chamber can carry the working current and short-time withstand current; when the line current needs to be interrupted, the moving contact of the arc extinguishing chamber and the static contact of the arc extinguishing chamber are quickly separated under the drive of the rebound force of the opening energy storage spring, generating a vacuum arc, which is maintained by the continuous generation of metal vapor between the contacts. In the case of AC, the vacuum arc current has a zero-crossing moment, and the arc current is reduced to a certain extent, which is not enough to maintain the arc and realize current breaking.

[0009] It is further defined that the energy storage mechanism includes an energy storage eccentric wheel and an energy storage handle, the energy storage handle is detachably mounted on the energy storage eccentric wheel, and the energy storage eccentric wheel is movably connected to the end cover via a pin shaft.

[0010] The use of energy storage eccentric wheel and energy storage handle greatly saves the force required for energy storage and makes the operation more user-friendly.

[0011] It is further defined that the moving contact actuating assembly includes an energy storage rod, a push rod which is sleeved inside the energy storage rod and can move up and down, and a closing energy storage spring which is fixed at the bottom of the energy storage rod and sleeved outside the push rod. The energy storage rod is located directly below the energy storage eccentric wheel and is connected to a bypass terminal extending out of the sleeve. The bottom of the push rod is connected to the moving contact, and the closing energy storage spring is tightly against the moving contact.

[0012] The push rod moves up and down in the energy storage rod, saving installation space; the moving contact is connected to the bottom of the push rod and is tightly pressed by the energy storage spring. The force of the energy storage spring acts on the moving contact to achieve closing, and the structure is simple and reasonable.

[0013] It is further defined that the gate-opening locking mechanism comprises a first mounting seat, a first pull ring and a first limit pin of a limit push rod, the first mounting seat is fixed on one side of the outer wall of the sleeve, and is connected to the first pull ring through a pin shaft, one end of the first limit pin passes through the sleeve and the energy storage rod locking push rod, and the other end thereof is connected to the first pull ring through a pin shaft.

[0014] The push rod is unlocked (locked) by pulling (pushing) the first limit pin, which is simple and convenient to operate and saves time and effort.

[0015] It is further defined that the closing locking mechanism includes a second mounting seat, a second pull ring and a second limit pin of the limit energy storage rod, the second mounting seat is fixed on the other side of the outer wall of the sleeve, and is connected to the second pull ring through a pin shaft, one end of the second limit pin passes through the sleeve to lock the energy storage rod, and the other end of the second limit pin is connected to the second pull ring through a pin shaft.

[0016] The energy storage rod can be unlocked (locked) by pulling (pushing) the second limit pin, which is simple and convenient to operate and saves time and effort.

[0017] It is further defined that the opening and closing indication mechanism comprises a "closed" label, an opening and closing indication needle and an "open" label, the "closed" label is arranged on the outer wall of the sleeve corresponding to the top end of the static contact, the opening and closing indication needle is connected to the bottom of the moving contact, and the "open" label is arranged on the outer wall of the sleeve corresponding to the bottom end of the moving contact when it is not in motion.

[0018] By setting the opening and closing indicator needle, the "closed" label and the "opened" label, it is possible to observe whether the closing and opening are in place.

[0019] It is further defined that the moving contact housing is provided with spring contact grease.

[0020] The use of spring contact grease makes the conduction between the moving contact and the upper connected parts more reliable.

[0021] It is further defined that the sleeve is made of transparent polycarbonate.

[0022] The sleeve is made of transparent polycarbonate, which makes it easy to observe the opening and closing process, and has flame retardant and insulating functions.

[0023] The beneficial effects of the present invention are as follows: the present invention has a miniaturized design, a compact structure, convenient equipment connection, and light operation; a vacuum arc extinguishing chamber is adopted, and the arc extinguishing process is completely completed in the ceramic shell, which completely solves the problem of arc burning; the energy storage mechanism adopts a cam mechanism, which saves effort in operation; the moving contact action component has a compact structure and saves installation space; the opening energy storage spring is arranged on the outside of the static contact, and the opening energy storage spring is compressed and stores energy when closing the switch, so as to push the moving contact to move upward to realize opening, thereby reducing components, simplifying assembly, and saving installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 yes Figure 1 Cross-section view in the AA direction.

[0027] Figure 3It is a structural schematic diagram of the energy storage mechanism in the present invention.

[0028] Figure 4 It is a structural schematic diagram of the moving contact action component in the present invention.

[0029] Figure 5 It is a partial structural schematic diagram of the present invention when the switch is closed and locked.

[0030] Figure 6 It is a partial structural schematic diagram of the present invention when the gate is opened and locked.

[0031] In the figure: 1. outer shell assembly, 2. energy storage mechanism, 3. opening and closing operating mechanism, 4. closing locking mechanism, 5. opening locking mechanism, 6. opening energy storage spring, 7. spring contact grease, 8. vacuum interrupter, 9. opening and closing indication mechanism, 10. bypass terminal, 11. sleeve, 12. end cover, 21. energy storage eccentric wheel, 22. eccentric wheel mounting shaft, 23. energy storage handle, 24. spacer, 25. reset torsion spring, 31. static contact, 32. moving contact, 33. moving contact action assembly, 41. second mounting seat, 42. second pull ring, 43. second limit pin, 51. first mounting seat, 52. first pull ring, 53. first limit pin, 81. ceramic housing, 82. static conductive rod, 83. contact system, 84. main shielding cover, 85. bellows, 86. guide sleeve, 87. moving conductive rod, 88. Bellows shielding cover, 89. Cover, 91. "Close" label, 92. Open / Close indicator needle, 93. "Open" label, 331. Energy storage rod, 332. Push rod, 333. Closing energy storage spring, 831. Arc extinguishing chamber static contact, 832. Arc extinguishing chamber moving contact, 3321. Limit rod. DETAILED DESCRIPTION

[0032] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] like Figure 1 and Figure 2As shown, a portable single-phase air bypass switch includes an outer shell assembly 1, an energy storage mechanism 2, an opening and closing operating mechanism 3, an opening and closing indicating mechanism 9, a closing locking mechanism 4, an opening locking mechanism 5 and a vacuum arc extinguishing chamber 8. The outer shell assembly 1 includes a sleeve 11 and an end cover 12 located at one end of the sleeve 11. The sleeve 11 is made of transparent polycarbonate. The energy storage mechanism 2 is arranged on the end cover 12. The opening and closing operating mechanism 3 includes a static contact 31, a moving contact 32 and a moving contact action assembly 33 for realizing opening or closing. The static contact 31 is arranged in the middle of the sleeve 11, and an opening energy storage spring 6 is arranged outside the static contact 31. The outer shell of the moving contact 32 is provided with a spring contact grease 7. The closing locking mechanism 4 and the opening locking mechanism 5 are respectively arranged on both sides of the upper part of the sleeve 11, and a vacuum arc extinguishing chamber 8 is arranged in the lower part of the sleeve 11.

[0034] The vacuum arc extinguishing chamber 8 includes a ceramic shell 81 and a static conductive rod 82, a contact system 83, a main shielding cover 84, a bellows 85, a guide sleeve 86 and a moving conductive rod 87 located in the ceramic shell 81. The upper part of the static conductive rod 82 extends out of the ceramic shell 81, and a static contact 31 is provided on the top of the static conductive rod 82. The main shielding cover 84 is provided outside the contact system 83. The contact system 83 includes an arc extinguishing chamber static contact 831 connected to the lower end of the static conductive rod 82 and an arc extinguishing chamber moving contact 832 located at the upper end of the moving conductive rod 87. The lower part of the moving conductive rod 87 extends out of the vacuum arc extinguishing chamber 8, and a guide sleeve 86 is provided at the connection between the two. A bellows 85 is provided outside the upper part of the moving conductive rod 87, and a bellows shielding cover 88 is provided on the upper end of the bellows 85. The lower end of the moving conductive rod 87 is provided with a hook-shaped groove, and a cover 89 is provided on the end thereof.

[0035] like Figure 3 As shown, the energy storage mechanism 2 includes an energy storage eccentric wheel 21, an eccentric wheel mounting shaft 22 and an energy storage handle 23. The energy storage eccentric wheel 21 is sleeved on the eccentric wheel mounting shaft 22. The eccentric wheel mounting shaft 22 is detachably mounted on the end cover 12. The energy storage handle 23 is connected to the outer edge of the energy storage eccentric wheel 21. A through hole is provided in the middle of the end cover 12. A bracket 121 is formed by protruding upward near the through hole on the upper end surface of the end cover 12. Two L-shaped grooves 122 are provided on the upper end of the bracket 121. The two ends of the eccentric wheel mounting shaft 22 are respectively clamped in the two L-shaped grooves 122; a spacer 24 is provided on the eccentric wheel mounting shaft 22 on one side of the energy storage eccentric wheel 21, and a reset torsion spring 25 is provided on the eccentric wheel mounting shaft 22 on the other side thereof. One end of the reset torsion spring 25 is fixed on the energy storage eccentric wheel 21, and the other end thereof is arranged on the bracket 121.

[0036] like Figure 4As shown, the moving contact action assembly 33 includes an energy storage rod 331, a push rod 332 sleeved inside the energy storage rod 331 and movable up and down, and a closing energy storage spring 333 fixed at the bottom of the energy storage rod 331 and sleeved outside the push rod 332. The energy storage rod 331 is located directly below the energy storage eccentric wheel 21 and is connected to the bypass terminal 10 extending out of the sleeve. The bottom of the push rod 332 is connected to the moving contact 32, and the closing energy storage spring 333 is tightly against the moving contact 32. A limit rod 3321 is provided on the upper part of the push rod 332, and a limit hole for limiting the travel of the limit rod 3321 is opened on the energy storage rod 331.

[0037] The opening locking mechanism 5 includes a first mounting seat 51, a first pull ring 52 and a first limit pin 53 of the limit push rod 332. The first mounting seat 51 is fixed on one side of the outer wall of the sleeve 11, and is connected to the first pull ring 52 through a pin. One end of the first limit pin 53 passes through the sleeve 11 and the energy storage rod 331 to lock the push rod 332, and the other end of the first limit pin 53 is connected to the first pull ring 52 through a pin. The closing locking mechanism 4 includes a second mounting seat 41, a second pull ring 42 and a second limit pin 43 of the limit energy storage rod 331. The second mounting seat 41 is fixed on the other side of the outer wall of the sleeve 11, and is connected to the second pull ring 42 through a pin. One end of the second limit pin 43 passes through the sleeve 11 to lock the energy storage rod 331, and the other end of the second limit pin 43 is connected to the second pull ring 42 through a pin.

[0038] The opening and closing indicating mechanism 9 includes a "closed" label 91, an opening and closing indicating needle 92 and an "open" label 93. The "closed" label 91 is arranged on the outer wall of the sleeve 11 at the top end of the static contact 31, the opening and closing indicating needle 92 is connected to the bottom of the moving contact 32, and the "open" label 93 is arranged on the outer wall of the sleeve 11 at the bottom end of the moving contact 32 when it is not in motion.

[0039] Working principle: When in use, the single-phase air bypass switch is in the open state, that is, the moving contact 32 and the static contact 31 are separated, the bypass terminal 10 is connected to the ground wire, the hook-shaped groove at the bottom of the moving conductive rod 87 is hung on the line with maintenance, the second pull ring 42 of the closing locking mechanism 4 is pulled to unlock the energy storage rod 331, and the energy storage handle 23 is pressed downward to drive the energy storage eccentric wheel 21 to rotate around the eccentric wheel mounting shaft 22, pushing the energy storage rod 331 to move downward, and the opening energy storage spring 6 gradually compresses the energy storage, and after the energy storage is sufficient, the moving contact 32 and the push rod 332 are pushed downward. , so that the moving contact 32 contacts the stationary contact 31. After the switch is in place (the sleeve 11 is made of transparent polycarbonate, and the closing process can be observed), the opening and closing indicator needle 92 follows the moving contact 32 and moves to the "closing" label 91, and the switch is in place; the moving contact 32 compresses the opening energy storage spring 6 to give enough pressure to the stationary contact 31, so that the vacuum interrupter 8 can carry the working current and short-time withstand current; the current is transmitted from the line to be repaired through the moving conductive rod 87 to the vacuum interrupter 8, and the vacuum interrupter 8 is connected to the stationary contact 31. The current is transmitted to the stationary contact 31 and passes through the stationary contact 31. The energy is transmitted to the moving contact 32, transmitted to the energy storage rod 331 through the push rod 332, and then transmitted to the grounding line through the bypass terminal 10 connected to the energy storage rod 331; the second limit pin 43 of the closing locking mechanism 4 is pushed to lock the energy storage rod 331 after it moves downward (an upper and lower limit holes are provided on the outer wall of the energy storage rod 331, and the second limit pin 43 is inserted into the lower limit hole in the open state and inserted into the upper limit hole in the closed state), completing the closing locking, such as Figure 5 As shown;

[0040] The opening energy storage spring 6 is compressed and fully energy is stored. The opening energy storage spring 6 pushes the static contact 31 to move upward, driving the push rod 332 and the closing energy storage spring 333 to move upward. After the opening is in place (the sleeve 11 is made of transparent polycarbonate, and the opening process can be observed), the opening and closing indicator needle 92 follows the moving contact 32 and moves to the "opening" label 92, and the opening is in place; driven by the rebound force of the opening energy storage spring 6, the arc extinguishing chamber moving contact 832 and the arc extinguishing chamber static contact 831 are quickly separated to generate a vacuum arc, which is maintained by continuously generating metal vapor between the contacts; the first limit pin 53 of the opening locking mechanism 5 passes through the sleeve 11 and the energy storage rod 331 to lock the push rod 332, completing the opening locking, such as Figure 6 shown.

[0041] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable single-phase air bypass switch, characterized in that: It includes an outer shell assembly, an energy storage mechanism, a switch-on and switch-off operating mechanism, a switch-on and switch-off indicating mechanism, a switch-on locking mechanism, a switch-off locking mechanism and a vacuum arc extinguishing chamber. The outer shell assembly includes a sleeve and an end cover located at one end of the sleeve. The energy storage mechanism is arranged on the end cover. The switch-on and switch-off operating mechanism includes a static contact and a moving contact located in the sleeve and a moving contact action assembly for realizing switch-on or switch-off. The closing locking mechanism and the switch-off locking mechanism are respectively arranged on both sides of the upper part of the sleeve. A vacuum arc extinguishing chamber is arranged in the lower part of the sleeve. The vacuum interrupter comprises a ceramic shell and a static conductive rod, a contact system, a main shielding cover, a bellows, a guide sleeve and a dynamic conductive rod located in the ceramic shell. The upper part of the static conductive rod extends out of the ceramic shell, and a static contact is provided on the top of the static conductive rod. The main shielding cover is provided outside the contact system. The contact system comprises an interrupter static contact connected to the lower end of the static conductive rod and an interrupter dynamic contact located at the upper end of the dynamic conductive rod. The lower part of the dynamic conductive rod extends out of the vacuum interrupter, and a guide sleeve is provided at the connection between the two. A bellows is provided outside the upper part of the dynamic conductive rod, and a bellows shielding cover is provided at the upper end of the bellows. The energy storage mechanism comprises an energy storage eccentric wheel and an energy storage handle. The energy storage handle is detachably mounted on the energy storage eccentric wheel. The energy storage eccentric wheel is movably connected to the end cover via a pin shaft.

2. The portable single-phase air bypass switch according to claim 1, characterized in that: A switch-off energy storage spring is arranged outside the upper part of the static conductive rod extending out of the ceramic shell, a hook-shaped groove is arranged at the lower end of the dynamic conductive rod, and a cover is arranged on the end thereof.

3. The portable single-phase air bypass switch according to claim 1, characterized in that: The moving contact actuating assembly includes an energy storage rod, a push rod sleeved inside the energy storage rod and movable up and down, and a closing energy storage spring fixed at the bottom of the energy storage rod and sleeved outside the push rod. The energy storage rod is located directly below the energy storage eccentric wheel and is connected to a bypass grounding terminal extending out of the sleeve. The bottom of the push rod is connected to the moving contact, and the closing energy storage spring is tightly against the moving contact.

4. The portable single-phase air bypass switch according to claim 1, characterized in that: The gate-opening locking mechanism includes a first mounting seat, a first pull ring and a first limit pin of the limit push rod. The first mounting seat is fixed to one side of the outer wall of the sleeve and is connected to the first pull ring through a pin shaft. One end of the first limit pin passes through the sleeve and the energy storage rod locking push rod, and the other end is connected to the first pull ring through a pin shaft.

5. The portable single-phase air bypass switch according to claim 1, characterized in that: The closing locking mechanism includes a second mounting seat, a second pull ring and a second limit pin of the limit energy storage rod. The second mounting seat is fixed on the other side of the outer wall of the sleeve and is connected to the second pull ring through a pin shaft. One end of the second limit pin passes through the sleeve to lock the energy storage rod, and the other end of the second limit pin is connected to the second pull ring through a pin shaft.

6. The portable single-phase air bypass switch according to claim 1, characterized in that: The opening and closing indicating mechanism comprises a "closing" label, an opening and closing indicating needle and an "opening" label. The "closing" label is arranged on the outer wall of the sleeve at the top end of the corresponding static contact, the opening and closing indicating needle is connected to the bottom of the moving contact, and the "opening" label is arranged on the outer wall of the sleeve at the bottom end of the moving contact when it is not in motion.

7. The portable single-phase air bypass switch according to claim 1, characterized in that: The moving contact outer shell is provided with spring contact grease.

8. The portable single-phase air bypass switch according to claim 1, characterized in that: The sleeve is made of transparent polycarbonate.

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