A slow-broken device, hydraulic operating mechanism and circuit breaker

Abstract

The present application relates to a kind of slow opening prevention device, hydraulic operating mechanism and circuit breaker, slow opening prevention device includes support frame, top rod, support plate, slow opening prevention device further includes transmission connecting plate rotatably installed on hydraulic operating mechanism, one end of transmission connecting plate is hinged with top rod, the other end of transmission connecting plate is hinged with support plate, or, the other end of transmission connecting plate is hinged with connecting plate between support plate, to drive support plate to rotate when top rod is pushed by spring assembly to prevent mechanism pull rod slow opening;Slow opening prevention device further includes one end fixed relative to top rod, the other end is fixed relative to support frame reset elastic element, reset elastic element is used to be deformed under stress when top rod is pushed by spring assembly and moves away from spring assembly, to provide power for the reset of transmission connecting plate and support plate.The present application effectively solves the problem that the transmission structure between the first slow opening prevention rod and slow opening prevention support in the prior art is complex, and transmission link is multiple.

Description

Technical Field

[0001] This invention relates to an anti-slow-break device, a hydraulic operating mechanism, and a circuit breaker, belonging to the technical field of high-voltage circuit breakers. Background Technology

[0002] A high-voltage circuit breaker can be divided into two main parts: the circuit breaker body and the hydraulic operating mechanism. The circuit breaker body is installed in a sealed container filled with sulfur hexafluoride gas at a certain pressure. The high-voltage system of the hydraulic operating mechanism needs to maintain high pressure for a long time. The hydraulic operating mechanism includes a working cylinder, which is connected to the circuit breaker body through a connecting seat. The piston rod (i.e., the mechanism pull rod) of the working cylinder is connected to the circuit breaker pull rod of the circuit breaker body through a joint, which is located inside the connecting seat.

[0003] During circuit breaker operation, the hydraulic operating mechanism may experience component failure or structural seal failure due to unforeseen circumstances. In this case, the hydraulic system will be unable to maintain high pressure and will drop to zero pressure, a phenomenon known as "hydraulic system depressurization." After depressurization, the force that keeps the circuit breaker in the closed position disappears. At this point, only the friction of the circuit breaker's moving parts can maintain the closed state. However, the circuit breaker body is subjected to the combined forces of the contact spring reaction force, the weight of the moving parts, and the pneumatic force. This combined force may exceed the friction of the moving parts, preventing the circuit breaker body from reliably maintaining the closed state and thus initiating the opening. While the opening force at this time is greater than the friction of the moving parts, it is still much less than the opening force of the operating mechanism under normal conditions. Therefore, the circuit breaker will open at a slower speed, a phenomenon known as "slow opening due to depressurization." Under these circumstances, the circuit breaker will not be able to disconnect the faulty circuit, which is unacceptable during energized operation. Therefore, the hydraulic operating mechanism must be equipped with a "depressurization-preventing slow opening" device.

[0004] The "pressure loss prevention and slow breakage" device, such as the mechanical anti-slow breakage device of the hydraulic spring operating mechanism of a high-voltage circuit breaker disclosed in Chinese Utility Model Patent No. CN203085443U, includes a first fixed guide plate (i.e., support frame) fixed on the working cylinder, a first anti-slow breakage rod (i.e., top rod) guided through the first fixed guide plate, and a second anti-slow breakage rod connected to the first anti-slow breakage rod via a crank arm. The crank arm includes a rotating shaft and a first arm and a second arm fixed at both ends of the rotating shaft. The first arm and the second arm are respectively hinged to the first anti-slow breakage rod and the second anti-slow breakage rod. The first anti-slow breakage rod extends along the movement direction of the disc spring assembly and is arranged perpendicular to the second anti-slow breakage rod. The second anti-slow breakage rod is guided through the second fixed guide plate and is connected to an anti-slow breakage bracket (i.e., support plate) for abutting the joint between the circuit breaker pull rod and the piston rod. The anti-slow breakage bracket is rotatably mounted on the working cylinder. When the hydraulic structure loses pressure, the disc spring assembly moves upward, causing the first anti-slow-opening rod to move upward. The rotation is then transmitted to the second anti-slow-opening rod via the crank arm. The second anti-slow-opening rod then drives the anti-slow-opening bracket to rotate, causing the anti-slow-opening bracket to abut against the joint, preventing the piston rod from retracting and opening the circuit, thus achieving the purpose of preventing slow opening.

[0005] However, in the anti-slow-separation device in the aforementioned patent document, the first anti-slow-separation rod and the anti-slow-separation bracket are connected by a crank arm and a second anti-slow-separation rod. Furthermore, since the crank arm includes a rotating shaft and a first arm and a second arm fixed at both ends of the rotating shaft, the transmission structure between the first anti-slow-separation rod and the anti-slow-separation bracket is complex and involves many transmission links. Summary of the Invention

[0006] The purpose of this invention is to provide an anti-slow-departure device to solve the problems of complex transmission structure and multiple transmission links between the first anti-slow-departure rod and the anti-slow-departure bracket in the prior art; the purpose of this invention is also to provide a hydraulic operating mechanism and a circuit breaker to solve the above problems.

[0007] To achieve the above objectives, the anti-slow-split device of the present invention adopts the following technical solution:

[0008] An anti-slow-separation device includes a support frame for mounting on a hydraulic operating mechanism, a push rod mounted on the support frame and pushed by a spring assembly in the hydraulic operating mechanism, and a support plate rotatably mounted on the hydraulic operating mechanism. The anti-slow-separation device also includes a transmission connecting plate rotatably mounted on the hydraulic operating mechanism, one end of which is hinged to the push rod, and the other end of which is hinged to the support plate. Alternatively, a connecting plate is hinged between the other end of the transmission connecting plate and the support plate, so that when the push rod is pushed by the spring assembly, it drives the transmission connecting plate to rotate, thereby driving the support plate to rotate to prevent the mechanism pull rod from slowly separating. The anti-slow-separation device also includes a reset elastic element, one end of which is fixed relative to the push rod and the other end of which is fixed relative to the support frame. The reset elastic element is used to deform under force when the push rod is pushed by the spring assembly and moves away from the spring assembly, so as to provide power for the reset of the transmission connecting plate, the support plate, and the push rod.

[0009] The beneficial effects of the above technical solution are as follows: This invention improves upon existing anti-slow-separation devices. In the anti-slow-separation device of this invention, one end of the transmission connecting plate rotatably mounted on the hydraulic operating mechanism is hinged to the push rod, and the other end is hinged to the support plate, or a connecting plate is hinged between the other end and the support plate. Furthermore, one end of the reset elastic element is fixed relative to the push rod, and the other end is fixed relative to the support frame. Thus, when the hydraulic operating mechanism loses pressure, the spring assembly pushes the push rod to move. Simultaneously, the reset elastic element deforms under force due to the movement of the push rod, and the pushed push rod is driven by the transmission connecting plate or the transmission connecting plate and the connecting plate. The support plate rotates to restrict the slow movement of the mechanism's pull rod, thus preventing slow movement. When the pressure of the hydraulic operating mechanism is normal, under the elastic force of the reset elastic element deformed by the force, the push rod moves towards the spring assembly. The push rod then drives the support plate to reset through the transmission connecting plate or the transmission connecting plate and the connecting plate, thus avoiding the normal movement of the mechanism's pull rod. Compared with the prior art, the push rod and the support plate in this invention are only connected by the transmission connecting plate or the transmission connecting plate and the connecting plate. The transmission connecting plate and the connecting plate have simple structures and are easy to manufacture. At the same time, they can also simplify the transmission links between the push rod and the support plate to a certain extent.

[0010] Furthermore, the transmission connecting plate and the push rod are detachably hinged. The anti-slow separation device also includes a retaining elastic element with one end fixed relative to the push rod and the other end fixed relative to the transmission connecting plate. The retaining elastic element has a pre-deformation amount so that after the transmission connecting plate and the push rod are disassembled, the transmission connecting plate is pressed onto the support frame and cannot rotate.

[0011] The beneficial effects of the above technical solution are as follows: After the hinge between the transmission connecting plate and the push rod is disassembled, the elastic force of the retaining elastic element with pre-deformation can press the transmission connecting plate onto the support frame, ensuring that the transmission connecting plate cannot rotate. This helps to avoid the influence of the push rod's movement on the state of the transmission connecting plate, and further helps to prevent the transmission connecting plate from driving the support plate to rotate and causing motion interference with the mechanism's tie rod, thus ensuring the normal operation of the mechanism's tie rod.

[0012] Furthermore, the elastic element and the reset elastic element are placed on opposite sides of the transmission connecting plate.

[0013] The beneficial effects of the above technical solution are: it optimizes the arrangement of the retaining elastic element and the resetting elastic element, making the integrated installation of the retaining elastic element and the resetting elastic element at the top rod more convenient, facilitating their respective installation, and ensuring that they do not interfere with each other.

[0014] Furthermore, the transmission connecting plate and the push rod are hinged by a pin, and the transmission connecting plate or the push rod is provided with an elongated hole or slot for the pin to pass through.

[0015] The beneficial effects of the above technical solution are as follows: by passing the pin through the elongated hole or slot, the hinge between the transmission connecting plate and the push rod can be realized, and the engagement between the pin and the elongated hole or slot can also prevent the transmission connecting plate and the push rod from jamming, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0016] Furthermore, the top rod is set vertically, and the support plate and transmission connecting plate are both used to be set below the mechanism tie rod.

[0017] The beneficial effects of the above technical solution are that it can reduce the installation height of the anti-slow-separation device to a certain extent, which is conducive to the setting and installation of the anti-slow-separation device.

[0018] Furthermore, the support frame includes a fixed plate for fixing to the hydraulic operating mechanism and side plates fixed on opposite sides of the fixed plate. The top rod guide is installed on the two side plates, and the U-shaped opening formed by the two side plates and the fixed plate is arranged outward.

[0019] The beneficial effects of the above technical solution are as follows: it optimizes the specific structure of the support frame, which can not only ensure the stable installation of the support frame on the hydraulic operating mechanism, but also facilitate the installation of the push rod on the support frame. In addition, by setting the U-shaped opening formed by the two side plates and the fixed plate outward, it is convenient to observe the movement state of the push rod and the hinge state between the push rod and the transmission connecting plate, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0020] Furthermore, the connecting plate is hinged between the transmission connecting plate and the support plate. The connecting plate has an insertion end for inserting into the hydraulic operating mechanism and an exposure end for exposing itself outside the hydraulic operating mechanism. The insertion end is hinged to the support plate, and the exposure end is hinged to the transmission connecting plate.

[0021] The beneficial effects of the above technical solution are as follows: the insertion end and the exposed end of the connecting plate facilitate the hinge connection between the connecting plate and the support plate and the transmission connecting plate, and at the same time, it can avoid interference between the support plate and the transmission connecting plate and the hydraulic operating mechanism to a certain extent.

[0022] To achieve the above objectives, the hydraulic operating mechanism of this invention adopts the following technical solution:

[0023] A hydraulic operating mechanism includes a spring assembly, a mechanism pull rod, and an anti-slow-separation device. The anti-slow-separation device includes a support frame mounted on the hydraulic operating mechanism, a push rod mounted on the support frame and pushed by the spring assembly in the hydraulic operating mechanism, and a support plate rotatably mounted on the hydraulic operating mechanism. The anti-slow-separation device also includes a transmission connecting plate rotatably mounted on the hydraulic operating mechanism, one end of which is hinged to the push rod, and the other end of which is hinged to the support plate. Alternatively, a connecting plate is hinged between the other end of the transmission connecting plate and the support plate, so that when the push rod is pushed by the spring assembly, it drives the transmission connecting plate to rotate, thereby driving the support plate to rotate to prevent the mechanism pull rod from slowly separating. The anti-slow-separation device also includes a reset elastic element, one end of which is fixed relative to the push rod and the other end of which is fixed relative to the support frame. The reset elastic element is used to deform under force when the push rod is pushed by the spring assembly and moves away from the spring assembly, so as to provide power for the reset of the transmission connecting plate, the support plate, and the push rod.

[0024] The beneficial effects of the above technical solution are as follows: This invention improves upon the existing hydraulic operating mechanism. In the hydraulic operating mechanism of this invention, one end of the transmission connecting plate rotatably mounted on the hydraulic operating mechanism is hinged to the push rod, and the other end is hinged to the support plate, or the other end is hinged to the support plate by a connecting plate. Furthermore, since one end of the reset elastic element is fixed relative to the push rod and the other end is fixed relative to the support frame, when the hydraulic operating mechanism loses pressure, the spring assembly will push the push rod to move. Simultaneously, the reset elastic element will deform under force due to the movement of the push rod, and the pushed push rod will pass through the transmission connecting plate or the transmission connecting plate and the connecting plate. The support plate is rotated to restrict the slow movement of the mechanism's pull rod, thus preventing slow movement. When the pressure of the hydraulic operating mechanism is normal, the push rod moves towards the spring assembly under the elastic force of the reset elastic element that has deformed under stress. The push rod then drives the support plate to reset through the transmission connecting plate or the transmission connecting plate and the connecting plate, thus avoiding the normal movement of the mechanism's pull rod. Compared with the prior art, the push rod and the support plate in this invention are only connected by the transmission connecting plate or the transmission connecting plate and the connecting plate. The transmission connecting plate and the connecting plate have simple structures and are easy to manufacture. At the same time, they can also simplify the transmission links between the push rod and the support plate to a certain extent.

[0025] Furthermore, the transmission connecting plate and the push rod are detachably hinged. The anti-slow separation device also includes a retaining elastic element with one end fixed relative to the push rod and the other end fixed relative to the transmission connecting plate. The retaining elastic element has a pre-deformation amount so that after the transmission connecting plate and the push rod are disassembled, the transmission connecting plate is pressed onto the support frame and cannot rotate.

[0026] The beneficial effects of the above technical solution are as follows: After the hinge between the transmission connecting plate and the push rod is disassembled, the elastic force of the retaining elastic element with pre-deformation can press the transmission connecting plate onto the support frame, ensuring that the transmission connecting plate cannot rotate. This helps to avoid the influence of the push rod's movement on the state of the transmission connecting plate, and further helps to prevent the transmission connecting plate from driving the support plate to rotate and causing motion interference with the mechanism's tie rod, thus ensuring the normal operation of the mechanism's tie rod.

[0027] Furthermore, the elastic element and the reset elastic element are placed on opposite sides of the transmission connecting plate.

[0028] The beneficial effects of the above technical solution are: it optimizes the arrangement of the retaining elastic element and the resetting elastic element, making the integrated installation of the retaining elastic element and the resetting elastic element at the top rod more convenient, facilitating their respective installation, and ensuring that they do not interfere with each other.

[0029] Furthermore, the transmission connecting plate and the push rod are hinged by a pin, and the transmission connecting plate or the push rod is provided with an elongated hole or slot for the pin to pass through.

[0030] The beneficial effects of the above technical solution are as follows: by passing the pin through the elongated hole or slot, the hinge between the transmission connecting plate and the push rod can be realized, and the engagement between the pin and the elongated hole or slot can also prevent the transmission connecting plate and the push rod from jamming, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0031] Furthermore, the top rod is set vertically, and the support plate and transmission connecting plate are both used to be set below the mechanism tie rod.

[0032] The beneficial effects of the above technical solution are that it can reduce the installation height of the anti-slow-separation device to a certain extent, which is conducive to the setting and installation of the anti-slow-separation device.

[0033] Furthermore, the support frame includes a fixed plate for fixing to the hydraulic operating mechanism and side plates fixed on opposite sides of the fixed plate. The top rod guide is installed on the two side plates, and the U-shaped opening formed by the two side plates and the fixed plate is arranged outward.

[0034] The beneficial effects of the above technical solution are as follows: it optimizes the specific structure of the support frame, which can not only ensure the stable installation of the support frame on the hydraulic operating mechanism, but also facilitate the installation of the push rod on the support frame. In addition, by setting the U-shaped opening formed by the two side plates and the fixed plate outward, it is convenient to observe the movement state of the push rod and the hinge state between the push rod and the transmission connecting plate, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0035] Furthermore, the connecting plate is hinged between the transmission connecting plate and the support plate. The connecting plate has an insertion end for inserting into the hydraulic operating mechanism and an exposure end for exposing itself outside the hydraulic operating mechanism. The insertion end is hinged to the support plate, and the exposure end is hinged to the transmission connecting plate.

[0036] The beneficial effects of the above technical solution are as follows: the insertion end and the exposed end of the connecting plate facilitate the hinge connection between the connecting plate and the support plate and the transmission connecting plate, and at the same time, it can avoid interference between the support plate and the transmission connecting plate and the hydraulic operating mechanism to a certain extent.

[0037] Furthermore, the hydraulic operating mechanism also includes a working cylinder and a connecting seat for connecting the working cylinder and the circuit breaker body. The support plate is rotatably mounted on the connecting seat, and the support frame in the anti-slow tripping device is mounted on the working cylinder and arranged on the side close to the connecting seat.

[0038] The beneficial effects of the above technical solution are: it can reduce the length of the transmission connecting plate, thereby reducing the weight of the transmission connecting plate and facilitating the driving of the transmission connecting plate by the push rod.

[0039] To achieve the above objectives, the circuit breaker in this invention adopts the following technical solution:

[0040] A circuit breaker includes a circuit breaker body and a hydraulic operating mechanism. The hydraulic operating mechanism includes a spring assembly, a mechanism pull rod, and an anti-slow-opening device. The anti-slow-opening device includes a support frame mounted on the hydraulic operating mechanism, a push rod mounted on the support frame and pushed by the spring assembly in the hydraulic operating mechanism, and a support plate rotatably mounted on the hydraulic operating mechanism. The anti-slow-opening device also includes a transmission connecting plate rotatably mounted on the hydraulic operating mechanism. One end of the transmission connecting plate is hinged to the push rod, and the other end of the transmission connecting plate is hinged to the support plate. Alternatively, a connecting plate is hinged between the other end of the transmission connecting plate and the support plate to drive the transmission connecting plate to rotate when the push rod is pushed by the spring assembly, thereby driving the support plate to rotate to prevent the mechanism pull rod from slowly opening. The anti-slow-opening device also includes a reset elastic element with one end fixed relative to the push rod and the other end fixed relative to the support frame. The reset elastic element is used to deform under force when the push rod is pushed by the spring assembly and moves away from the spring assembly to provide power for the reset of the transmission connecting plate, the support plate, and the push rod.

[0041] The beneficial effects of the above technical solution are as follows: This invention improves upon existing circuit breakers. In the circuit breaker of this invention, one end of the transmission connecting plate rotatably mounted on the hydraulic operating mechanism is hinged to the push rod, and the other end is hinged to the support plate, or the other end is hinged to the support plate via a connecting plate. Furthermore, one end of the reset elastic element is fixed relative to the push rod, and the other end is fixed relative to the support frame. Thus, when the hydraulic operating mechanism loses pressure, the spring assembly pushes the push rod to move. Simultaneously, the reset elastic element deforms under stress due to the movement of the push rod, and the pushed push rod drives the support frame through the transmission connecting plate or the transmission connecting plate and the connecting plate. The support plate rotates to restrict the slow movement of the mechanism's pull rod, thus preventing slow movement. When the pressure of the hydraulic operating mechanism is normal, under the elastic force of the reset elastic element deformed by the force, the push rod moves towards the spring assembly. The push rod then drives the support plate to reset through the transmission connecting plate or the transmission connecting plate and the connecting plate, thus avoiding the normal movement of the mechanism's pull rod. Compared with the prior art, the push rod and the support plate in this invention are only connected by the transmission connecting plate or the transmission connecting plate and the connecting plate. The transmission connecting plate and the connecting plate have simple structures and are easy to manufacture. At the same time, they can also simplify the transmission links between the push rod and the support plate to a certain extent.

[0042] Furthermore, the transmission connecting plate and the push rod are detachably hinged. The anti-slow separation device also includes a retaining elastic element with one end fixed relative to the push rod and the other end fixed relative to the transmission connecting plate. The retaining elastic element has a pre-deformation amount so that after the transmission connecting plate and the push rod are disassembled, the transmission connecting plate is pressed onto the support frame and cannot rotate.

[0043] The beneficial effects of the above technical solution are as follows: After the hinge between the transmission connecting plate and the push rod is disassembled, the elastic force of the retaining elastic element with pre-deformation can press the transmission connecting plate onto the support frame, ensuring that the transmission connecting plate cannot rotate. This helps to avoid the influence of the push rod's movement on the state of the transmission connecting plate, and further helps to prevent the transmission connecting plate from driving the support plate to rotate and causing motion interference with the mechanism's tie rod, thus ensuring the normal operation of the mechanism's tie rod.

[0044] Furthermore, the elastic element and the reset elastic element are placed on opposite sides of the transmission connecting plate.

[0045] The beneficial effects of the above technical solution are: it optimizes the arrangement of the retaining elastic element and the resetting elastic element, making the integrated installation of the retaining elastic element and the resetting elastic element at the top rod more convenient, facilitating their respective installation, and ensuring that they do not interfere with each other.

[0046] Furthermore, the transmission connecting plate and the push rod are hinged by a pin, and the transmission connecting plate or the push rod is provided with an elongated hole or slot for the pin to pass through.

[0047] The beneficial effects of the above technical solution are as follows: by passing the pin through the elongated hole or slot, the hinge between the transmission connecting plate and the push rod can be realized, and the engagement between the pin and the elongated hole or slot can also prevent the transmission connecting plate and the push rod from jamming, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0048] Furthermore, the top rod is set vertically, and the support plate and transmission connecting plate are both used to be set below the mechanism tie rod.

[0049] The beneficial effects of the above technical solution are that it can reduce the installation height of the anti-slow-separation device to a certain extent, which is conducive to the setting and installation of the anti-slow-separation device.

[0050] Furthermore, the support frame includes a fixed plate for fixing to the hydraulic operating mechanism and side plates fixed on opposite sides of the fixed plate. The top rod guide is installed on the two side plates, and the U-shaped opening formed by the two side plates and the fixed plate is arranged outward.

[0051] The beneficial effects of the above technical solution are as follows: it optimizes the specific structure of the support frame, which can not only ensure the stable installation of the support frame on the hydraulic operating mechanism, but also facilitate the installation of the push rod on the support frame. In addition, by setting the U-shaped opening formed by the two side plates and the fixed plate outward, it is convenient to observe the movement state of the push rod and the hinge state between the push rod and the transmission connecting plate, which is conducive to ensuring the normal operation of the anti-slow separation device.

[0052] Furthermore, the connecting plate is hinged between the transmission connecting plate and the support plate. The connecting plate has an insertion end for inserting into the hydraulic operating mechanism and an exposure end for exposing itself outside the hydraulic operating mechanism. The insertion end is hinged to the support plate, and the exposure end is hinged to the transmission connecting plate.

[0053] The beneficial effects of the above technical solution are as follows: the insertion end and the exposed end of the connecting plate facilitate the hinge connection between the connecting plate and the support plate and the transmission connecting plate, and at the same time, it can avoid interference between the support plate and the transmission connecting plate and the hydraulic operating mechanism to a certain extent.

[0054] Furthermore, the hydraulic operating mechanism also includes a working cylinder and a connecting seat for connecting the working cylinder and the circuit breaker body. The support plate is rotatably mounted on the connecting seat, and the support frame in the anti-slow tripping device is mounted on the working cylinder and arranged on the side close to the connecting seat.

[0055] The beneficial effects of the above technical solution are: it can reduce the length of the transmission connecting plate, thereby reducing the weight of the transmission connecting plate and facilitating the driving of the transmission connecting plate by the push rod. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the anti-slow tripping device in the normal state in Embodiment 1 of the circuit breaker of the present invention;

[0057] Figure 2 This is a schematic diagram of the anti-slow tripping device in the anti-slow tripping state in Embodiment 1 of the circuit breaker of the present invention.

[0058] In the diagram: 10, connecting seat; 20, working cylinder; 21, mechanism tie rod; 30, circuit breaker tie rod; 40, connector; 50, combined disc spring; 60, pressure plate; 70, support frame; 71, fixing plate; 72, upper side plate; 73, lower side plate; 80, push rod; 90, transmission connecting plate; 91, elongated hole; 100, first support; 110, pin; 120, connecting plate; 130, second support; 140, support plate; 150, return spring; 160, retaining spring. Detailed Implementation

[0059] Embodiment 1 of the circuit breaker of the present invention:

[0060] This invention improves upon existing circuit breakers. Compared with the prior art, the push rod and support plate in this invention are connected only by a transmission connecting plate or a transmission connecting plate and a connecting plate. The transmission connecting plate and the connecting plate have simple structures and are easy to manufacture. At the same time, they can also simplify the transmission links between the push rod and the support plate to a certain extent.

[0061] Specifically, such as Figure 1 As shown, the circuit breaker includes a circuit breaker body and a hydraulic operating mechanism that is pulsatorically connected to the circuit breaker body. Specifically, the circuit breaker body includes a circuit breaker pull rod 30, and the hydraulic operating mechanism includes a spring assembly, a working cylinder 20, and a connecting seat 10 connecting the working cylinder 20 and the circuit breaker body. The working cylinder 20 includes a piston rod, which constitutes the mechanism pull rod 21 of the hydraulic operating mechanism. The axis of the mechanism pull rod 21 is in the left-right direction. The mechanism pull rod 21 and the circuit breaker pull rod 30 are pulsatorically connected through a joint 40, and the joint 40 is located inside the connecting seat 10. In this embodiment, the spring assembly is a disc spring assembly. The movement direction of the disc spring assembly is perpendicular to the axis of the mechanism pull rod 21, and the disc spring assembly includes a combined disc spring 50 and a pressure plate 60 that presses against the combined disc spring 50.

[0062] like Figure 1As shown, the hydraulic operating mechanism also includes an anti-slow-separation device, which includes a support frame 70 fixedly mounted on the working cylinder 20, and the support frame 70 is arranged on the working cylinder 20 on the side close to the connecting seat 10. The support frame 70 includes a fixing plate 71 fixed to the working cylinder 20, and an upper side plate 72 and a lower side plate 73 fixed on opposite sides of the fixing plate 71 and arranged vertically. The U-shaped opening formed by the upper side plate 72, the lower side plate 73 and the fixing plate 71 is arranged outward. The anti-slow-separation device also includes a push rod 80 guided and mounted on the upper side plate 72 and the lower side plate 73 in the vertical direction, and the push rod 80 is pushed by the pressure plate 60. The anti-slow-separation device also includes a transmission connecting plate 90, which is rotatably mounted on the connecting seat 10 via a first support 100 fixed on the connecting seat 10. The right end of the transmission connecting plate 90 is hinged to the push rod 80 via a pin 110, and the pin 110 is detachable, meaning that the transmission connecting plate 90 and the push rod 80 are detachably hinged. The right end of the transmission connecting plate 90 is provided with an elongated hole 91 through which the pin 110 passes. Through the cooperation between the pin 110 and the elongated hole 91, jamming between the transmission connecting plate 90 and the push rod 80 can be prevented.

[0063] like Figure 1 As shown, the anti-slow-separation device also includes a reset elastic element and a retaining elastic element. In this embodiment, the reset elastic element is a reset spring 150 sleeved on the top rod 80, and the retaining elastic element is a retaining spring 160 sleeved on the top rod 80, both of which are compression springs. The upper end of the reset spring 150 presses against the lower side plate 73, and the lower end of the reset spring 150 presses against the lower retaining ring fixedly mounted on the top rod 80. This pressing action fixes the lower end of the reset spring 150 relative to the top rod 80 and the upper end relative to the support frame 70. The upper end of the retaining spring 160 presses against the upper retaining ring fixedly mounted on the top rod 80, and the lower end of the retaining spring 160 presses against the transmission connecting plate 90. This pressing action fixes the upper end of the reset spring 150 relative to the top rod 80 and the lower end relative to the transmission connecting plate 90.

[0064] like Figure 1 As shown, the anti-slow-opening device also includes a support plate 140 rotatably mounted inside the connecting seat 10 via a second support 130 fixed to the connecting seat 10. Both the support plate 140 and the transmission connecting plate 90 are located below the mechanism pull rod (21). The support plate 140 is used to abut against the joint 40 between the circuit breaker pull rod 30 and the mechanism pull rod 21. By abutting the joint 40 with the support plate 140, the slow-opening action of the mechanism pull rod 21 can be restricted, thereby restricting the slow-opening of the circuit breaker body. A connecting plate 120 is hinged between the left end of the transmission connecting plate 90 and the right end of the support plate 140. Specifically, the connecting plate 120 has an insertion end inserted into the connecting seat 10 and an exposed end exposed outside the connecting seat 10. The insertion end is hinged to the support plate 140, and the exposed end is hinged to the transmission connecting plate 90.

[0065] like Figure 2 As shown, if the hydraulic system loses pressure due to an unexpected reason, the combined disc spring 50 releases pressure and moves upward. Before the pressure is released to zero, the pressure plate 60 contacts the push rod 80 and pushes the push rod 80 upward. At the same time, the return spring 150 is deformed by force, and under the drive of the pin shaft 110, the transmission connecting plate 90 rotates counterclockwise, and then drives the support plate 140 to rotate clockwise through the connecting plate 120. The left end of the support plate 140 rotates to the right end of the connector 40. When the circuit breaker slows to open, the support of the support plate 140 can prevent the connector 40 from moving to the right, thereby preventing the circuit breaker from opening and realizing the anti-slow opening. At this time, the anti-slow opening device is in the anti-slow opening state.

[0066] After the hydraulic mechanism is inspected and the fault is eliminated, the hydraulic system regains pressure. The combined disc spring 50 is compressed and moves downward. After the pressure plate 60 and the push rod 80 disengage, the push rod 80 moves downward under the elastic force of the return spring 150. This movement drives the transmission connecting plate 90 to rotate clockwise via the pin 110. The transmission connecting plate 90 then drives the support plate 140 to rotate counterclockwise via the connecting plate 120. The push rod 80, the transmission connecting plate 90, and the support plate 140 are reset. The return spring 150 provides the power for the reset of the transmission connecting plate 90, the support plate 140, and the push rod 80. Figure 1 As shown, at this time, the retaining spring 160 has a pre-deformation amount. Under the elastic force of the retaining spring 160, the transmission connecting plate 90 is pressed on the lower side plate 73 and cannot rotate and is in a horizontal state. At the same time, through the drive of the connecting plate 120, the support plate 140 is also in a horizontal state. The anti-slow tripping device returns to normal state. At this time, there is a certain distance between the support plate 140 and the connector 40, and the anti-slow tripping device will not affect the normal operation of the circuit breaker.

[0067] During product debugging, operation may occur under low oil pressure. In this case, to prevent the combined disc spring 50 from touching the push rod 80 and causing the anti-slow-separation device to activate, and thus to prevent the connector 40 from damaging the support plate 140, the pin 110 should be removed. This will prevent the push rod 80 from driving the transmission connecting plate 90 and the support plate 140 to rotate. At this time, under the action of the retaining spring 160, the transmission connecting plate 90 and the support plate 140 will remain in a horizontal state, and the anti-slow-separation device will not function. After product debugging is completed, the pin 110 can be inserted, and the product can be put into normal operation.

[0068] Embodiment 2 of the circuit breaker of the present invention:

[0069] This embodiment provides a support frame placement different from Embodiment 1. The difference lies in that, in this embodiment, the support frame is not positioned on the side of the working cylinder closest to the connecting seat. In other embodiments, the support frame may be mounted on the cylinder body connected to the working cylinder and used to mount the spring assembly, or it may be mounted on the connecting seat.

[0070] Embodiment 3 of the circuit breaker of the present invention:

[0071] This embodiment provides a connecting plate arrangement different from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the connecting plate is entirely located within the hydraulic operating mechanism. In other embodiments, the connecting plate may also be entirely located outside the hydraulic operating mechanism.

[0072] Embodiment 4 of the circuit breaker of the present invention:

[0073] This embodiment provides a connecting plate arrangement different from that of Embodiment 1. The difference lies in that, in this embodiment, the two side plates of the support frame are fixed to the hydraulic operating mechanism via connecting edges, and the U-shaped opening formed by the two side plates and the fixing plate faces inward. In other embodiments, the support frame can also be a cylindrical body, with a top rod guide installed within the cylindrical body.

[0074] Embodiment 5 of the circuit breaker of the present invention:

[0075] This embodiment provides a support plate with a different setting position than that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the support plate is set above the mechanism pull rod. In this case, the spring assembly and the transmission connecting plate are both set above the working cylinder. When the spring assembly moves from top to bottom, it can drive the push rod to move.

[0076] Embodiment 6 of the circuit breaker of the present invention:

[0077] This embodiment provides a different setting position for the elongated hole than that in Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the elongated hole is set on the top rod.

[0078] Embodiment 7 of the circuit breaker of the present invention:

[0079] This embodiment provides an alternative to the elongated hole in Embodiments 1 and 6. The difference between this embodiment and Embodiments 1 and 6 is that in this embodiment, the elongated hole is replaced by a slot.

[0080] Embodiment 8 of the circuit breaker of the present invention:

[0081] This embodiment provides a different setting position for the retaining elastic element and the resetting elastic element than that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the retaining elastic element and the resetting elastic element are set on the same side of the transmission connecting plate, and one of the retaining elastic element and the resetting elastic element is a tension spring and the other is a compression spring.

[0082] Embodiment 9 of the circuit breaker of the present invention:

[0083] This embodiment provides a retaining elastic element and a resetting elastic element that are different from those in Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, both the retaining elastic element and the resetting elastic element are elastic rubber rings.

[0084] Embodiment 10 of the circuit breaker of the present invention:

[0085] This embodiment provides a retaining elastic element and a resetting elastic element that are different from those in Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the resetting elastic element is disposed on the upper side of the transmission connecting plate, and the retaining elastic element is disposed on the lower side of the transmission connecting plate. Both the retaining elastic element and the resetting elastic element are tension springs.

[0086] Embodiment 11 of the circuit breaker of the present invention:

[0087] This embodiment provides a drive for the transmission connecting plate that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, no retaining elastic element is provided, and the reset drive of the transmission connecting plate can only rely on the force of the reset elastic element. In this case, after the transmission connecting plate and the push rod are disassembled, a support element can be provided between the hydraulic operating mechanism and the transmission connecting plate to maintain the arrangement state of the transmission connecting plate, thereby maintaining the arrangement state of the support plate and avoiding the support plate restricting the movement of the mechanism pull rod.

[0088] Embodiment 12 of the circuit breaker of the present invention:

[0089] This embodiment provides a drive for the transmission connecting plate that differs from that of Embodiment 1. The difference between this embodiment and Embodiment 1 is that in this embodiment, the transmission connecting plate is directly connected to the support plate for transmission.

[0090] An embodiment of the hydraulic operating mechanism in this invention: The specific structure of the hydraulic operating mechanism is the same as that of the hydraulic operating mechanism in the circuit breaker embodiment described above, and will not be repeated here.

[0091] An embodiment of the anti-slow tripping device in this invention: The specific structure of the anti-slow tripping device is the same as that of the anti-slow tripping device in the above-described circuit breaker embodiment, and will not be repeated here.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A slow-separation prevention device, comprising a support frame (70) for mounting on a hydraulic operating mechanism, a push rod (80) guided and mounted on the support frame (70) and pushed by a spring assembly in the hydraulic operating mechanism, and a support plate (140) for rotatably mounted on the hydraulic operating mechanism, characterized in that, The anti-slow-separation device also includes a transmission connecting plate (90) rotatably mounted on the hydraulic operating mechanism. One end of the transmission connecting plate (90) is hinged to the push rod (80), and the other end of the transmission connecting plate (90) is hinged to the support plate (140) by a connecting plate (120). When the push rod (80) is pushed by the spring assembly, the transmission connecting plate (90) rotates, thereby driving the support plate (140) to rotate to prevent the mechanism pull rod (21) from slowly separating. The anti-slow-separation device also includes a reset elastic element with one end fixed relative to the push rod (80) and the other end fixed relative to the support frame (70). The reset elastic element is used to deform under force when the push rod (80) is pushed by the spring assembly and moves away from the spring assembly, so as to provide power for the reset of the transmission connecting plate (90), the support plate (140) and the push rod (80). The transmission connecting plate (90) and the push rod (80) are detachably hinged. The anti-slow separation device also includes a retaining elastic element with one end fixed relative to the push rod (80) and the other end fixed relative to the transmission connecting plate (90). The retaining elastic element has a pre-deformation amount so that after the transmission connecting plate (90) and the push rod (80) are disassembled, the transmission connecting plate (90) is pressed onto the support frame (70) and cannot rotate. The retaining elastic element and the reset elastic element are placed on both sides of the transmission connecting plate (90).

2. The anti-slow-split device according to claim 1, characterized in that, The transmission connecting plate (90) and the push rod (80) are hinged by a pin (110), and the transmission connecting plate (90) or the push rod (80) is provided with an elongated hole or slot through which the pin (110) passes.

3. The anti-slow-split device according to claim 1, characterized in that, The top rod (80) is set vertically, and the support plate (140) and the transmission connecting plate (90) are both set below the mechanism tie rod (21).

4. The anti-slow-split device according to claim 1, characterized in that, The support frame (70) includes a fixed plate (71) for fixing to the hydraulic operating mechanism and side plates fixed on opposite sides of the fixed plate (71). The top rod (80) is guided and mounted on the two side plates, and the U-shaped opening formed by the two side plates and the fixed plate (71) is set outward.

5. The anti-slow-split device according to claim 1, characterized in that, The connecting plate (120) is hinged between the transmission connecting plate (90) and the support plate (140). The connecting plate (120) has an insertion end for inserting into the hydraulic operating mechanism and an exposure end for exposing outside the hydraulic operating mechanism. The insertion end is hinged to the support plate (140), and the exposure end is hinged to the transmission connecting plate (90).

6. A hydraulic operating mechanism, comprising a spring assembly, a mechanism lever (21), and an anti-slow-separation device, characterized in that, The anti-slow-separation device is the same as the anti-slow-separation device described in any one of claims 1 to 5.

7. The hydraulic operating mechanism according to claim 6, characterized in that, The hydraulic operating mechanism also includes a working cylinder (20) and a connecting seat (10) for connecting the working cylinder (20) and the circuit breaker body. A support plate (140) is rotatably mounted on the connecting seat (10). The support frame (70) in the anti-slow-break device is mounted on the working cylinder (20) and arranged on the side close to the connecting seat (10).

8. A circuit breaker, comprising a circuit breaker body and a hydraulic operating mechanism, characterized in that, The hydraulic operating mechanism is the same as that described in claim 6 or 7.

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