A double-acting high-voltage sulfur hexafluoride circuit breaker transmission device

Abstract

The invention discloses a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device, comprising: a first linear motion member, a first circular motion member, a second linear motion member, a second circular motion member and a linkage member; the first linear motion member is connected to the end of the moving contact facing away from the static arc contact, and can be driven by the moving contact to move linearly; the first linear motion member is connected to the first circular motion member, driving the first circular motion member to move circularly; the first circular motion member is connected to the second circular motion member through the linkage member, driving the second circular motion member to move circularly; the second circular motion member is connected to the second linear motion member, driving the second linear motion member to move linearly, the second linear motion member is connected to the end of the static arc contact facing away from the moving contact, driving the static arc contact to move linearly; the first linear motion member and the second linear motion member have opposite movement directions, and the first circular motion member and the second circular motion member have opposite rotation directions. The invention can improve the speed of opening and closing.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device. Background Art

[0002] As one of the most important equipment in the power system, the circuit breaker mainly plays two functions in the power grid, namely control and protection. The high-voltage SF6 circuit breaker is a switching device that uses SF6 gas as an insulating and arc-extinguishing medium and can close, carry and break the specified short-circuit current in the high-voltage transmission line within a specified time. When a fault occurs in the power grid, the fault line is quickly isolated to ensure that other equipment can continue to operate normally and prevent the fault from expanding and causing greater impact.

[0003] Traditional high-voltage sulfur hexafluoride circuit breaker transmission devices usually adopt a single-acting structure, that is, a transmission mechanism is used to realize the opening and closing operations. This structure has some limitations, including:

[0004] Operation efficiency limitation: The single-acting structure requires greater force and travel during opening and closing operations, resulting in slower operation speed and limiting the response speed of the circuit breaker;

[0005] Reliability Challenges: Due to the large force and stroke requirements, single-acting transmissions are susceptible to mechanical wear and failure, which can lead to equipment instability and reliability issues. Summary of the invention

[0006] The embodiment of the present invention provides a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device to solve the problem that the high-voltage sulfur hexafluoride circuit breaker transmission device in the prior art adopts a single-acting structure resulting in low efficiency and reliability.

[0007] The embodiment of the present invention discloses the following technical solution:

[0008] A double-acting high-voltage sulfur hexafluoride circuit breaker transmission device comprises: a first linear motion member, a first circular motion member, a second linear motion member, a second circular motion member and a linkage member located in an arc extinguishing chamber;

[0009] The first linear motion member is connected to an end of the moving contact facing away from the static arc contact, and can be driven by the moving contact to perform linear motion; the first linear motion member is connected to the first circular motion member, and is used to drive the first circular motion member to perform circular motion; the first circular motion member is connected to the second circular motion member through the linkage member, and is used to drive the second circular motion member to perform circular motion; the second circular motion member is connected to the second linear motion member, and is used to drive the second linear motion member to perform linear motion, and the second linear motion member is connected to an end of the static arc contact facing away from the moving contact, and is used to drive the static arc contact to perform linear motion;

[0010] The movement directions of the first linear motion member and the second linear motion member are opposite and parallel to the movement directions of the moving contact and the static arc contact, and the rotation directions of the first circular motion member and the second circular motion member are opposite.

[0011] Further: the first linear motion member is a moving contact rack, the first circular motion member is a moving contact gear, the second linear motion member is a stationary arc contact rack, the second circular motion member is a stationary arc contact gear, and the linkage member includes: a moving contact crank, a stationary arc contact crank, a first connecting rod and a second connecting rod;

[0012] One end of the moving contact rack is connected to the end of the moving contact facing away from the static arc contact, the moving contact gear is meshed with the moving contact rack, a first rotating shaft is fixedly installed in the arc extinguishing chamber, and one end of the moving contact gear and the moving contact crank are both sleeved on the first rotating shaft and can rotate synchronously;

[0013] One end of the static arc contact rack is connected to the end of the static arc contact facing away from the moving contact, the static arc contact gear is meshed with the static arc contact rack, a second rotating shaft is fixedly installed in the arc extinguishing chamber, and one end of the static arc contact gear and the static arc contact crank are both sleeved on the second rotating shaft and can rotate synchronously;

[0014] The other end of the moving contact crank is axially connected to one end of the first connecting rod, the other end of the first connecting rod is axially connected to one end of the second connecting rod, and the other end of the static arc contact crank is axially connected to the other end of the second connecting rod.

[0015] Furthermore, it also includes: a slideway and a slider, wherein the slideway is fixedly installed in the arc extinguishing chamber, and the slideway extends along the movement direction of the moving contact and the static arc contact; the slider is arranged in the slideway and can move linearly in the slideway, and a third rotating shaft is fixedly set at the center of one side wall of the slider, and the center of the second connecting rod can be rotatably mounted on the third rotating shaft.

[0016] Furthermore, it also includes: a moving contact guide rod and a static arc contact guide rod, one end of the moving contact guide rod is connected to the end of the moving contact facing away from the static arc contact, the moving contact rack is arranged on the surface of the moving contact guide rod, one end of the static arc contact guide rod is connected to the end of the static arc contact facing away from the moving contact, and the static arc contact rack is arranged on the surface of the static arc contact guide rod.

[0017] Further: the moving contact gear and one end of the moving contact crank are connected together through a first bearing rotatably mounted on the first rotating shaft, and the stationary arc contact gear and one end of the stationary arc contact crank are connected together through a second bearing rotatably mounted on the second rotating shaft.

[0018] Further: the plane where the centers of the moving contact gear, the static arc contact gear and the slider are located is parallel to the movement direction of the moving contact and the static arc contact.

[0019] Further: when the moving contact and the static arc contact are in the open state, the slider is located at one end of the slideway close to the moving contact, the static arc contact crank and the second connecting rod both extend along the movement direction of the moving contact and the static arc contact, and the axis connecting the moving contact crank and one end of the first connecting rod is located on the side of the slideway facing the moving contact.

[0020] Further: when the moving contact and the static arc contact are in the closed state, the slider is located at one end of the slideway close to the static arc contact, the static arc contact crank and the second connecting rod both extend along the movement direction of the moving contact and the static arc contact, and the axis connecting the moving contact crank and one end of the first connecting rod is located on the side of the slideway facing away from the moving contact.

[0021] In this way, in the embodiment of the present invention, through the double-acting transmission mechanism connection, the moving contact moves while driving the static arc contact to move in the opposite direction, thereby realizing the linkage between the moving contact and the static arc contact, thereby increasing the opening and closing speed, reducing the opening and closing operation work, and minimizing the opening and closing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0023] Figure 1 It is a structural schematic diagram of a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device controlling the circuit breaker opening according to an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device controlling the closing of the circuit breaker according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The embodiment of the invention discloses a double-acting high-voltage sulfur hexafluoride circuit breaker transmission device, which comprises: a first linear motion member, a first circular motion member, a second linear motion member, a second circular motion member and a linkage member located in an arc extinguishing chamber.

[0028] The first linear motion member is connected to the end of the moving contact facing away from the static arc contact, and can drive the passive contact to move linearly; the first linear motion member is connected to the first circular motion member, and is used to drive the first circular motion member to make circular motion; the first circular motion member is connected to the second circular motion member through a linkage member, and is used to drive the second circular motion member to make circular motion; the second circular motion member is connected to the second linear motion member, and is used to drive the second linear motion member to make linear motion, and the second linear motion member is connected to the end of the static arc contact facing away from the moving contact, and is used to drive the static arc contact to make linear motion.

[0029] The movement directions of the first linear motion member and the second linear motion member are opposite and parallel to the movement directions of the moving contact and the static arc contact. The rotation directions of the first circular motion member and the second circular motion member are opposite.

[0030] In this way, through the above-mentioned structural design, when the circuit breaker is opened, the moving contact is controlled to make a linear motion in the direction away from the static arc contact, the moving contact drives the first linear motion member to make a linear motion in the direction away from the static arc contact, the first linear motion member drives the first circular motion member to rotate in the first direction, the first circular motion member drives the second circular motion member to rotate in the second direction opposite to the first direction through the linkage member, the second circular motion member drives the second linear motion member to make a linear motion in the direction away from the moving contact, the second linear motion member drives the static arc contact to make a linear motion in the direction away from the moving contact, so as to realize rapid circuit breaker opening.

[0031] Similarly, when closing the circuit breaker, the moving contact is controlled to make a linear motion in the direction close to the static arc contact, the moving contact drives the first linear motion member to make a linear motion in the direction close to the static arc contact, the first linear motion member drives the first circular motion member to rotate in the second direction, the first circular motion member drives the second circular motion member to rotate in the first direction opposite to the second direction through the linkage member, the second circular motion member drives the second linear motion member to make a linear motion in the direction close to the moving contact, the second linear motion member drives the static arc contact to make a linear motion in the direction close to the moving contact, so as to realize rapid closing of the circuit breaker.

[0032] like Figure 1 As shown, in a specific embodiment of the present invention, the first linear motion part is the moving contact rack 7, the first circular motion part is the moving contact gear 9, the second linear motion part is the static arc contact rack 2, the second circular motion part is the static arc contact gear 19, and the linkage parts include: a moving contact crank 11, a static arc contact crank 3, a first connecting rod 13 and a second connecting rod 15.

[0033] One end of the moving contact rack 7 is connected to the end of the moving contact 6 facing away from the static arc contact 5. The moving contact gear 9 is meshed with the moving contact rack 7, so that the movement of the moving contact rack 7 can drive the moving contact gear 9 to rotate. The first rotating shaft 10 is fixedly installed in the arc extinguishing chamber. One end of the moving contact gear 9 and the moving contact crank 11 are both sleeved on the first rotating shaft 10 and can rotate synchronously. Preferably, one end of the moving contact gear 9 and the moving contact crank 11 are connected together through a first bearing rotatably sleeved on the first rotating shaft 10, thereby achieving synchronous rotation.

[0034] One end of the static arc contact rack 2 is connected to the end of the static arc contact 5 facing away from the moving contact 6. The static arc contact gear 19 is meshed with the static arc contact rack 2, so that the rotation of the static arc contact gear 19 can drive the static arc contact rack 2 to move. A second rotating shaft 20 is fixedly installed in the arc extinguishing chamber. One end of the static arc contact gear 19 and the static arc contact crank 3 are both sleeved on the second rotating shaft 20 and can rotate synchronously. Preferably, the static arc contact gear 19 and one end of the static arc contact crank 3 are connected together through a second bearing rotatably sleeved on the second rotating shaft 20, thereby achieving synchronous rotation.

[0035] The other end of the movable contact crank 11 is connected to one end of the first connecting rod 13 by a shaft, which is denoted as the fourth rotating shaft 12. In this way, the movable contact crank 11 can rotate around the fourth rotating shaft 12, and the first connecting rod 13 can also rotate around the fourth rotating shaft 12. It should be understood that the movable contact crank 11 and the first connecting rod 13 do not need to rotate synchronously.

[0036] The other end of the first connecting rod 13 is axially connected to one end of the second connecting rod 15, and the axis is recorded as the fifth rotating shaft 14. In this way, the first connecting rod 13 can rotate around the fifth rotating shaft 14, and the second connecting rod 15 can also rotate around the fifth rotating shaft 14. It should be understood that the first connecting rod 13 and the second connecting rod 15 do not need to rotate synchronously.

[0037] The other end of the static arc contact crank 3 is connected to the other end of the second connecting rod 15 by a shaft, which is denoted as the sixth rotating shaft 4. In this way, the static arc contact crank 3 can rotate around the sixth rotating shaft 4, and the second connecting rod 15 can also rotate around the sixth rotating shaft 4. It should be understood that the static arc contact crank 3 and the second connecting rod 15 do not need to rotate synchronously.

[0038] Preferably, the device comprises: a slideway 18 and a slider 17. The slideway 18 is fixed in the arc extinguishing chamber. The slideway 18 extends along the movement direction of the moving contact 6 and the static arc contact 5. The slider 17 is arranged in the slideway 18 and can move linearly in the slideway 18. It should be understood that the width of the slider 17 matches the width of the slideway 18. The third rotating shaft 16 is fixedly arranged at the center of one side wall of the slider 17. The center of the second connecting rod 15 is rotatably sleeved on the third rotating shaft 16.

[0039] Through the above structural design, the slider 17 can play a role in supporting the second connecting rod 15. In addition, in order to avoid the problem that the slider is fixed in position and thus restricts the movement of the second connecting rod 15, the slider 17 is designed to move in the slideway 18. When the movable contact crank 11 rotates one circle, the slider 17 reciprocates linearly once, so as to avoid affecting the movement of the linkage. The slideway 18 limits the movement of the slider 17 and guides the movement of the slider 17 to ensure the linear movement of the slider 17.

[0040] It should be understood that the plane where the centers of the moving contact gear 9 , the static arc contact gear 19 and the slider 17 are located is parallel to the movement direction of the moving contact 6 and the static arc contact 5 .

[0041] It should also be understood that the positions of the moving contact rack 7, the moving contact crank 11, the first connecting rod 13, the second connecting rod 15, the static arc contact rack 2, the static arc contact crank 3, the slideway 18, etc. can be reasonably designed to Figure 1 For example, in the direction perpendicular to the page, these components can be placed on staggered planes to avoid blocking their respective movements.

[0042] In a preferred embodiment, the device further comprises: a moving contact guide rod 8 and a static arc contact guide rod 1. One end of the moving contact guide rod 8 is connected to the end of the moving contact 6 facing away from the static arc contact 5. The moving contact rack 7 is arranged on the surface of the moving contact guide rod 8. One end of the static arc contact guide rod 1 is connected to the end of the static arc contact 5 facing away from the moving contact 6. The static arc contact rack 2 is arranged on the surface of the static arc contact guide rod 1.

[0043] By arranging the moving contact guide rod 8 and the static arc contact guide rod 1, support can be provided to the moving contact rack 7 and the static arc contact rack 2 respectively, and the movement of the moving contact rack 7 and the static arc contact rack 2 can be guided, so as to ensure the reliable engagement and power transmission of the moving contact rack 7 and the moving contact gear 9, as well as the static arc contact rack 2 and the static arc contact gear 19. At the same time, it can also play a role of limiting to prevent damage to parts due to overshooting due to excessive speed. In addition, the smoothness of the movement of the transmission device is also guaranteed.

[0044] When the moving contact 6 and the static arc contact 5 are in the open state, the slider 17 is located at the end of the slideway 18 close to the moving contact 6. The static arc contact crank 3 and the second connecting rod 15 both extend along the movement direction of the moving contact 6 and the static arc contact 5. The shaft connecting the moving contact crank 11 and one end of the first connecting rod 13 is located on the side of the slideway 18 facing the moving contact 6.

[0045] When the moving contact 6 and the static arc contact 5 are in the closed state, the slider 17 is located at the end of the slideway 18 close to the static arc contact 5. The static arc contact crank 3 and the second connecting rod 15 both extend along the movement direction of the moving contact 6 and the static arc contact 5. The shaft connecting the moving contact crank 11 and one end of the first connecting rod 13 is located on the side of the slideway 18 facing away from the moving contact 6.

[0046] The application process of the double-acting high-voltage sulfur hexafluoride circuit breaker transmission device is as follows:

[0047] 1. Opening stage:

[0048] like Figure 2 As shown, the moving contact 6 is controlled to move rightward, the moving contact 6 drives the moving contact rack 7 to move rightward along the moving contact guide rod 8, and the moving contact rack 7 drives the moving contact gear 9 to rotate counterclockwise, so as to realize the conversion of linear motion into circular motion; the moving contact gear 9 drives the moving contact crank 11 to rotate counterclockwise, the moving contact crank 11 drives the first connecting rod 13 to rotate, the first connecting rod 13 drives the second connecting rod 15 to move, and the second connecting rod 15 pushes the slider 17 to reciprocate linearly in the slideway 18 to avoid the movement of the second connecting rod 15 being affected When the limit is reached, the second connecting rod 15 drives the static arc contact crank 3 to rotate clockwise, the static arc contact crank 3 drives the static arc contact gear 19 to rotate clockwise, and the static arc contact gear 19 drives the static arc contact rack 2 to move left along the static arc contact guide rod 1, realizing the conversion of circular motion into linear motion; the static arc contact rack 2 drives the static arc contact 5 to move left, and this process realizes the moving contact 6 and the static arc contact 5 to move in opposite directions, accelerates the rapid separation of the moving contact 6 and the static arc contact 5, and enables the circuit breaker to quickly complete the opening operation.

[0049] 2. Closing stage:

[0050] like Figure 3As shown, the moving contact 6 is controlled to move to the left, the moving contact 6 drives the moving contact rack 7 to move to the left along the moving contact guide rod 8, and the moving contact rack 7 drives the moving contact gear 9 to rotate clockwise, so as to realize the conversion of linear motion into circular motion; the moving contact gear 9 drives the moving contact crank 11 to rotate clockwise, the moving contact crank 11 drives the first connecting rod 13 to rotate, the first connecting rod 13 drives the second connecting rod 15 to move, and the second connecting rod 15 pushes the slider 17 to reciprocate linearly in the slideway 18 to avoid the movement of the second connecting rod 15 being affected When the limit is reached, the second connecting rod 15 drives the static arc contact crank 3 to rotate counterclockwise, the static arc contact crank 3 drives the static arc contact gear 19 to rotate counterclockwise, and the static arc contact gear 19 drives the static arc contact rack 2 to move rightward along the static arc contact guide rod 1, realizing the conversion of circular motion into linear motion; the static arc contact rack 2 drives the static arc contact 5 to move rightward, and this process realizes the movement of the moving contact 6 and the static arc contact 5 in opposite directions, speeding up the rapid closing of the moving contact 6 and the static arc contact 5, so that the circuit breaker can quickly complete the closing operation.

[0051] In summary, in the embodiments of the present invention, through the double-acting transmission mechanism connection, the moving contact moves while driving the static arc contact to move in the opposite direction, thereby realizing the linkage between the moving contact and the static arc contact, thereby increasing the opening and closing speed, reducing the opening and closing operation work, and minimizing the opening and closing time.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-acting high-voltage sulfur hexafluoride circuit breaker transmission device, characterized in that: include: A first linear motion member, a first circular motion member, a second linear motion member, a second circular motion member and a linkage member located in the arc extinguishing chamber; The first linear motion member is connected to an end of the moving contact facing away from the static arc contact, and can be driven by the moving contact to perform linear motion; the first linear motion member is connected to the first circular motion member, and is used to drive the first circular motion member to perform circular motion; the first circular motion member is connected to the second circular motion member through the linkage member, and is used to drive the second circular motion member to perform circular motion; the second circular motion member is connected to the second linear motion member, and is used to drive the second linear motion member to perform linear motion, and the second linear motion member is connected to an end of the static arc contact facing away from the moving contact, and is used to drive the static arc contact to perform linear motion; The movement directions of the first linear motion member and the second linear motion member are opposite and parallel to the movement directions of the moving contact and the static arc contact, and the rotation directions of the first circular motion member and the second circular motion member are opposite; The first linear motion member is a moving contact rack, the first circular motion member is a moving contact gear, the second linear motion member is a stationary arc contact rack, the second circular motion member is a stationary arc contact gear, and the linkage member includes: a moving contact crank, a stationary arc contact crank, a first connecting rod and a second connecting rod; One end of the moving contact rack is connected to the end of the moving contact facing away from the static arc contact, the moving contact gear is meshed with the moving contact rack, a first rotating shaft is fixedly installed in the arc extinguishing chamber, and one end of the moving contact gear and the moving contact crank are both sleeved on the first rotating shaft and can rotate synchronously; One end of the static arc contact rack is connected to the end of the static arc contact facing away from the moving contact, the static arc contact gear is meshed with the static arc contact rack, a second rotating shaft is fixedly installed in the arc extinguishing chamber, and one end of the static arc contact gear and the static arc contact crank are both sleeved on the second rotating shaft and can rotate synchronously; The other end of the movable contact crank is axially connected to one end of the first connecting rod, the other end of the first connecting rod is axially connected to one end of the second connecting rod, and the other end of the static arc contact crank is axially connected to the other end of the second connecting rod; It also includes: a slideway and a slider, wherein the slideway is fixedly installed in the arc extinguishing chamber, and the slideway extends along the movement direction of the moving contact and the static arc contact; the slider is arranged in the slideway and can move linearly in the slideway, a third rotating shaft is fixedly set at the center of one side wall of the slider, and the center of the second connecting rod is rotatably mounted on the third rotating shaft.

2. The double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to claim 1, characterized in that: Also includes: A moving contact guide rod and a static arc contact guide rod, one end of the moving contact guide rod is connected to the end of the moving contact facing away from the static arc contact, the moving contact rack is arranged on the surface of the moving contact guide rod, one end of the static arc contact guide rod is connected to the end of the static arc contact facing away from the moving contact, and the static arc contact rack is arranged on the surface of the static arc contact guide rod.

3. The double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to claim 1 is characterized in that: The moving contact gear and one end of the moving contact crank are connected together through a first bearing rotatably mounted on the first rotating shaft, and the stationary arc contact gear and one end of the stationary arc contact crank are connected together through a second bearing rotatably mounted on the second rotating shaft.

4. The double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to claim 1 is characterized in that: The plane where the centers of the moving contact gear, the static arc contact gear and the sliding block are located is parallel to the moving directions of the moving contact and the static arc contact.

5. The double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to claim 1 is characterized in that: When the moving contact and the static arc contact are in the open state, the slider is located at one end of the slideway close to the moving contact, the static arc contact crank and the second connecting rod both extend along the movement direction of the moving contact and the static arc contact, and the axis connecting the moving contact crank and one end of the first connecting rod is located on the side of the slideway facing the moving contact.

6. The double-acting high-voltage sulfur hexafluoride circuit breaker transmission device according to claim 1 is characterized in that: When the moving contact and the static arc contact are in a closed state, the slider is located at one end of the slideway close to the static arc contact, the static arc contact crank and the second connecting rod both extend along the movement direction of the moving contact and the static arc contact, and the axis connecting the moving contact crank and one end of the first connecting rod is located on the side of the slideway facing away from the moving contact.

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