Energy storage stroke detection and overpressure relief device, use method and equipment

Abstract

The invention belongs to the technical field of circuit breakers, and discloses an energy storage stroke detection and overpressure relief device, a use method and equipment, the device comprises a bending plate, the bending plate is connected with a transition plate, and the top of the transition plate is connected with a boss plate; a microswitch is arranged above the boss plate; a guide rail is arranged below the transition plate, and the transition plate is slidably connected with the guide rail; a groove is formed in one end of the transition plate, a first pulling plate is arranged in the groove, a second pulling plate is arranged on the outer side of the end of the transition plate, and the first pulling plate and the second pulling plate are connected through a connecting shaft pin penetrating through the transition plate. A pressing block is connected between the end of the first pulling plate and the end of the second pulling plate through a pressing block pulling shaft pin, and the bottom of the pressing block is connected with a pressure release valve. The overpressure relief device can be stably kept in a horizontal state and is accurately pulled at a set pressure point, so that the hydraulic spring operating mechanism can accurately and reliably relieve pressure, parts of the overpressure relief device are reduced, and the reliability of the hydraulic operating mechanism is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breakers, and particularly relates to an energy storage stroke detection and overpressure relief device, a usage method and equipment. Background Art

[0002] There is a one-to-one correspondence between the energy storage spring stroke of the hydraulic spring operating mechanism of a circuit breaker and the working pressure of the hydraulic mechanism. Usually, the monitoring of the working pressure of the mechanism and overpressure relief are achieved through a spring stroke monitoring device and an overpressure relief device. As Figure 1 shown, the existing spring energy storage stroke detection device and the mechanism overpressure relief device of the hydraulic spring operating mechanism are two independent devices. The spring energy storage stroke monitoring device drives a set of different opening cam plates assembled on the rotating shaft through a gear rack, and switches the travel switch at different stroke points of the energy storage spring to achieve the purpose of energy storage stroke detection; the overpressure relief device pulls the slider connected thereto through a connecting rod. When the slider slides to a certain position (overpressure of the hydraulic mechanism), it pulls the pull plate to open the pressure relief valve of the mechanism to achieve the purpose of pressure relief. However, when the hydraulic spring operating mechanism is horizontally installed, due to the certain lengths of the connecting rod and the pull plate in the overpressure relief device, the slider and the pull plate of the overpressure relief device will sink under the action of gravity, resulting in an included angle between the slider and the pull plate, which may cause the slider to be stuck in motion and the pull plate to be deformed, affecting the accuracy of the overpressure relief device; at the same time, it may also cause the pressure block connected to the pull plate in the overpressure relief device to tilt towards the pull plate side, causing internal leakage in the hydraulic spring operating mechanism.

[0003] The patent application with the Chinese patent publication number CN205723194U and the name of the pressure monitoring and control device in the high-voltage switch hydraulic operating mechanism includes a cam device, a microswitch device and a pressure relief device. Its characteristics are: the cam device is connected to the disc spring energy storage part through a double-headed screw part with adjustable length, the pressure relief device passes the pressure relief bracket through the indicating buckle plate through a pin shaft, and the pressure relief bracket rotates around the pin shaft, and the microswitch device is connected through a bent plate and a screw. This patent application cannot solve the problem of the tilt on the pull plate side, resulting in internal leakage in the hydraulic spring operating mechanism. Summary of the Invention

[0004] To overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an energy storage stroke detection and overpressure relief device, a usage method and equipment. The energy storage stroke detection and overpressure relief device is connected to the hydraulic spring operating mechanism of the circuit breaker. A transition plate is pulled by an adjustable-length pull rod, and the transition plate is connected to a travel switch boss plate to switch the travel switch at different stroke points of the energy storage spring. At the same time, the transition plate slides between the pull plates of the overpressure relief device. When the pressure of the hydraulic mechanism exceeds the safety value, the transition plate pulls the pull plate through a transverse pin, so that the mechanism relief valve is opened, thereby relieving the pressure of the mechanism and keeping the pressure of the hydraulic mechanism within the safety range. Under the support of the transition plate, the pull plate of the present invention can be stably maintained in a horizontal state. The pressure block in the overpressure relief device can be accurately pulled at the set pressure point, enabling the hydraulic spring operating mechanism to relieve pressure accurately and reliably, reducing the parts of the overpressure relief device, and improving the reliability of the hydraulic operating mechanism. To achieve the above object, the technical solution adopted by the present invention is: In the first aspect, the present invention provides an energy storage stroke detection and overpressure relief device, including: a bent plate, the bent plate is connected with a transition plate, and the top of the transition plate is connected with a boss plate; a microswitch is arranged above the boss plate; a guide rail is arranged below the transition plate, and the transition plate is slidably connected with the guide rail; a groove is opened at one end of the transition plate, a first pull plate is arranged in the groove, a second pull plate is arranged outside the end of the transition plate, and the first pull plate and the second pull plate are connected by a connecting pin passing through the transition plate; a pressure block is connected between the ends of the first pull plate and the second pull plate by a pressure block pulling pin, and a relief valve is connected to the bottom of the pressure block.

[0005] Optionally, a ball bearing joint is installed at one end of the bent plate, the other end of the ball bearing joint is connected with a length adjustment rod through a fork, and the other end of the length adjustment rod is inserted into the transition plate.

[0006] Optionally, the top of the microswitch has a microswitch signal contact, and the bottom is provided with a microswitch roller.

[0007] Optionally, a slider is slidably connected to the guide rail, a chute matching the guide rail is opened at the bottom of the slider, and the top of the slider is connected with the transition plate.

[0008] Optionally, the transition plate includes a first plate member and a second plate member connected perpendicular to each other. A slider mounting hole and a boss plate mounting hole are opened on the plate surface of the first plate member; a through hole along the long axis of the transition plate is opened at the end of the second plate member of the transition plate, and the connecting pin is installed in the through hole.

[0009] Optionally, strip grooves are formed in the surfaces of the first pull plate and the second pull plate, and the connecting shaft pin passes through the strip grooves of the first pull plate and the second pull plate and through the through holes on both sides of the groove.

[0010] Optionally, fine adjustment screws are installed at the ends of the first pull plate and the second pull plate.

[0011] Optionally, a bracket is arranged outside the pressing block. The bracket includes a set of opposite parallel plate members. The bottoms of the two parallel plate members are connected by a connecting plate. A pressing block rotating shaft pin passing through the pressing block is connected between the two parallel plate members. The pressing block pulling shaft pin is arranged above the pressing block rotating shaft pin.

[0012] In a second aspect, the present invention provides a method for using the energy storage stroke detection and overpressure relief device, including the following steps: Drive the transition plate to move through the bent plate, so that the bosses at different strokes on the boss plate sequentially drive the corresponding microswitch blade opening and closing points in the microswitch to be switched, and output signals through the microswitch; When the hydraulic mechanism is under normal rated pressure, when the corresponding microswitch blade in the microswitch fails to be normally switched when the energy storage of the hydraulic mechanism reaches overpressure, or when a fault occurs in the control system, the transition plate continues to be pulled by the bent plate, pulls the pull plate through the connecting shaft pin, tilts the pressing block, opens the pressure relief valve, and makes the system pressure of the hydraulic spring operating mechanism no longer continue to rise.

[0013] In a third aspect, the present invention provides a circuit breaker hydraulic spring operating mechanism, including the energy storage stroke detection and overpressure relief device and a hydraulic spring operating mechanism working cylinder; the outside of the bent plate is connected to the hydraulic spring operating mechanism working cylinder through a support ring, and one end of the support ring facing away from the hydraulic spring operating mechanism working cylinder is connected with a hydraulic spring operating mechanism energy storage spring assembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The energy storage stroke detection and overpressure relief device of the present invention can simultaneously adjust the spring stroke monitoring and the opening size of the pressure relief valve through length adjustment, reduces the number of parts of the mechanism, and improves the accuracy of the difference between the spring stroke monitoring stroke and the opening stroke of the pressure relief valve.

[0015] While the transition plate of the present invention is connected to the stroke switch boss plate, it can also provide sufficient support for the pull plate. When the hydraulic spring operating mechanism is horizontally installed, the pull plate can be stably maintained in a horizontal state under the support of the transition plate, and the pressing block can be accurately pulled at the set pressure point, enabling the hydraulic spring operating mechanism to accurately and reliably relieve pressure, reducing the number of device parts, and improving the reliability of the hydraulic operating mechanism.

[0016] Furthermore, the boss plate structure of the present invention is a linear structure, which strictly corresponds to the spring compression stroke. Compared with the conventional rotating structure, it is easier to design the energy storage stroke change. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 is a three-dimensional external view schematic diagram of the existing energy storage stroke monitoring and pressure relief device of the hydraulic spring operating mechanism.

[0018] Figure 2 is a three-dimensional external view schematic diagram of the energy storage stroke monitoring and pressure relief device of the present invention.

[0019] Figure 3 is a three-dimensional connection schematic diagram of the energy storage stroke monitoring and pressure relief device of the present invention and the energy storage disc spring of the mechanism.

[0020] Figure 4 is a three-dimensional external view schematic diagram of the transition plate of the present invention.

[0021] Figure 5 is a three-dimensional external view schematic diagram of the boss plate of the present invention.

[0022] Figure 6 is a three-dimensional external view schematic diagram of an embodiment of the energy storage stroke monitoring and pressure relief device of the present invention.

[0023] Figure 7 is a three-dimensional external view schematic diagram of the guide rail of the present invention.

[0024] Figure 8 is a top view of the microswitch of the present invention.

[0025] Figure 9 is the present invention Figure 8 The cross-sectional view of the microswitch at P-P in the present invention.

[0026] Figure 10 is a three-dimensional structure schematic diagram of the present invention.

[0027] Among them, 1. The boss plate; 110. The rated pressure control boss; 111. The reclosing alarm pressure control boss; 112. The closing pressure alarm control boss; 113. The opening pressure alarm control boss; 114. The reclosing lock pressure control boss; 115. The opening lock pressure control boss; 116. The closing lock pressure control boss; 2. The microswitch; 201. The microswitch mounting bracket; 202. The microswitch roller; 203. The microswitch signal contact; 3. The transition plate; 31. The mounting surface; 32. The second plate member; 33. The groove; 34. The boss plate mounting hole; 35. The slider mounting hole; 36. The adjusting rod connection hole; 37. The through hole; 4. The length adjusting rod; 5. The clamp fork; 6. The bent plate; 7. The ball bearing joint; 8. The guide rail; 8. The guide rail; 801. The first slider; 802. The second slider; 81. The guide rail mounting hole; 82. The transition plate connection hole; 9. The pull plate; 91. The first pull plate; 92. The second pull plate; 901. The fine adjustment screw; 10. The connecting axle pin; 11. The pressure relief valve; 12. The pressing block; 121. The pressing block rotating axle pin; 122. The bracket; 123. The pressing block pulling axle pin; 131. The pressure relief handle axle pin; 13. The manual pressure relief handle; 14. The energy storage spring assembly; 15. The support ring; 16. The working cylinder. Detailed implementation manners

[0028] In order to enable those skilled in the art of this technology to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] When an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. When the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0032] It should be noted that: like reference numerals and letters denote like items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the present invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used in the description of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0034] The present invention will be described in detail below with reference to the accompanying drawings.

[0035] An energy storage stroke detection and overpressure relief device of the present invention includes: a bent plate 6, the bent plate 6 is connected to a transition plate 3, the top of the transition plate 3 is connected to a boss plate 1; a microswitch 2 is disposed above the boss plate 1; a guide rail 8 is disposed below the transition plate 3, and the transition plate 3 is slidably connected to the guide rail 8; a groove 33 is formed at one end of the transition plate 3, a first pull plate 91 is disposed in the groove 33, a second pull plate 92 is disposed outside the end of the transition plate 3, and the first pull plate 91 and the second pull plate 92 are connected by a connecting shaft pin 10 passing through the transition plate 3; a pressing block 12 is connected between the ends of the first pull plate 91 and the second pull plate 92 by a pressing block pulling shaft pin 123, and a pressure relief valve 11 is connected to the bottom of the pressing block 12.

[0036] The energy storage stroke detection and overpressure relief device of the present invention can adjust the spring stroke monitoring and the opening size of the relief valve simultaneously through length adjustment, reducing the number of components of the mechanism and improving the accuracy of the difference between the spring stroke monitoring stroke and the opening stroke of the relief valve.

[0037] While the transition plate 3 of the present invention is connected to the travel switch boss plate 1, it can also provide sufficient support for the pull plate 9. When the hydraulic spring operating mechanism is horizontally installed, the pull plate 9 can be stably maintained in a horizontal state under the support of the transition plate 3, and the pressure block 12 can be accurately pulled at the set pressure point, enabling the hydraulic spring operating mechanism to relieve pressure accurately and reliably, reducing the device parts and improving the reliability of the hydraulic operating mechanism.

[0038] Embodiment 1 In this embodiment, an energy storage stroke detection and overpressure relief device includes: a transition plate 3 and a bent plate 6. One end of the bent plate 6 is equipped with a ball bearing joint 7, the other end of the ball bearing joint 7 is connected to a length adjustment rod 4 through a fork 5, and the other end of the length adjustment rod 4 is inserted into the transition plate 3.

[0039] Optionally, the length adjustment rod 4 is a double-headed threaded rod.

[0040] The top of the transition plate 3 is connected to a boss plate 1. A microswitch 2 is arranged above the boss plate 1.

[0041] Specifically, the sphere of the ball bearing joint 7 is connected to the fork 5 through a shaft pin. The sphere is connected to a length adjustment rod perpendicular to the shaft pin connecting the sphere, and the other end of the length adjustment rod is connected to a bent plate 6. Specifically, the length adjustment rod has threads.

[0042] The boss plate 1 is a whole flat plate with bosses of different lengths processed on it, corresponding to the pressure control strokes of each part of the hydraulic operating mechanism respectively.

[0043] Specifically, the boss plate 1 has 110, rated pressure control boss 110, reclosing alarm pressure control boss 111, closing pressure alarm control boss 112, opening pressure alarm control boss 113, reclosing locking pressure control boss 114, opening locking pressure control boss 115 and closing locking pressure control boss.

[0044] The microswitch 2 is connected to a microswitch mounting bracket 201. The microswitch 2 is fixedly installed on the microswitch mounting bracket 201 through screws, as Figure 9 shown.

[0045] The top of the microswitch 2 has a microswitch signal contact 203, and the bottom is provided with a microswitch roller 202.

[0046] When the hydraulic spring mechanism stores energy or releases pressure, the transition plate 3 slides linearly on the guide rail along with the slider 801 while pulling the boss plate 1. When the roller 202 of the microswitch contacts the protrusions of the corresponding pressure control bosses on the boss plate 1, the roller 202 is pushed upward, causing the normally closed point of the microswitch to switch to the on state, and the switching signal is output through the signal contact 203 of the microswitch.

[0047] A guide rail 8 is provided below the transition plate 3.

[0048] Furthermore, the guide rail 8 is parallel to the length adjustment rod 4.

[0049] The bottom of the transition plate 3 is slidably connected to the guide rail 8. The boss plate 1 can slide together with the transition plate 3.

[0050] Optionally, the length of the guide rail 8 is 200 mm to 600 mm.

[0051] A slider 801 is slidably connected to the guide rail 8, and a guide rail mounting hole 81 is provided on the guide rail 8. A transition plate connection hole 82 is provided on the slider. A chute matching the guide rail 8 is provided at the bottom of the slider 801.

[0052] Optionally, the number of the sliders 801 is one or two.

[0053] Specifically, the transition plate 3 is connected to the slider (801) on the guide rail through a screw by fixing the transition plate connection hole 82, the slider (801) is stuck on the guide rail 8, and the slider 801 can slide freely on the guide rail.

[0054] Specifically, the slider is a rectangular block, and the transition plate connection holes 82 are provided at the four corners of the slider. Optionally, both the guide rail mounting hole 81 and the transition plate connection hole 82 are screw holes. Optionally, the slider includes a first slider 801 and a second slider 802.

[0055] Specifically, the transition plate 3 is L-shaped.

[0056] As Figure 4 shown, the transition plate 3 includes a first plate member 31 and a second plate member 32 that are perpendicularly connected to each other.

[0057] Slider mounting holes 35 and boss plate mounting holes 34 are provided on the plate surface of the first plate member 31.

[0058] Optionally, both the slider mounting holes 35 and the boss plate mounting holes 34 are screw holes.

[0059] The boss plate 1 is fixedly installed above the first plate member 31 of the transition plate 3, and a through hole 37 along the long axis of the transition plate 3 is provided at the end of the second plate member 32 of the transition plate 3.

[0060] The top of the first plate member 31 of the transition plate 3 has a mounting surface, on which a slider mounting hole 35 for connecting with the slider 801 of the guide rail 8 and a boss plate mounting hole 34 for connecting with the boss plate 1 are provided.

[0061] On one side of the second plate member 32 facing away from the first plate member 31, an adjusting rod connection hole 36 is provided at one end, and a groove 33 is provided at the other end. The adjusting rod connection hole 36 is provided with a length adjusting rod 4. Specifically, the adjusting rod connection hole 36 is a threaded hole.

[0062] The groove 33 communicates with the outside, and the groove direction of the groove 33 is the same as the axial direction of the first plate member 31.

[0063] A through hole 37 is provided at the end of the second plate member 32 away from the adjusting rod connection hole 36. The groove 33 communicates with the through hole 37, and the through hole 37 penetrates through the groove 33. Through holes 37 are provided on both side walls of the groove 33.

[0064] Further, the groove 33 communicates with the through hole 37.

[0065] Optionally, the groove 33 is perpendicular to the through hole 37.

[0066] A first pull plate 91 is arranged in the groove 33 of the transition plate 3, and a second pull plate 92 is arranged at the end of the transition plate 3 close to the groove 33.

[0067] The first pull plate 91 and the second pull plate 92 form a pull plate 9.

[0068] Strip-shaped grooves are provided on the plate surfaces of the first pull plate 91 and the second pull plate 92. The first pull plate 91 is installed in the groove 33, and the second pull plate 92 is installed at the end of the second plate member 32 where the through hole 37 is provided.

[0069] A connecting shaft pin 10 is installed in the through hole 37. The connecting shaft pin 10 passes through the strip-shaped grooves of the first pull plate 91 and the second pull plate 92 and passes through the through holes 37 on both sides of the groove 33. The transition plate 3 supports the pull plate 9 through the connecting shaft pin 10 to prevent the pull plate 9 from sinking under the action of gravity.

[0070] As Figure 2As shown, a fine-tuning screw 901 is installed at the end of the pull plate 9. By adjusting the length of the fine-tuning screw 901 extending into the strip-shaped groove of the pull plate 9, the maximum stroke length of the connecting shaft pin 10 can be changed. When the transition plate 3 is moved so that the connecting shaft pin 10 is in contact with the fine-tuning screw 901, the transition plate 3 can drive the pull plate 9 to move. Therefore, by adjusting the fine-tuning screw 901, the opening point of the pressure relief valve of the hydraulic spring operating mechanism can be finely adjusted.

[0071] One end of the pull plate 9 away from the fine-tuning screw 901 is fixedly connected with a pressure block 12, and the pressure block 12 is located between the first pull plate 91 and the second pull plate 92.

[0072] A bracket 122 is arranged outside the pressure block 12. The bracket 122 includes a group of opposite parallel plate members, and the bottoms of the two parallel plate members are connected by a connecting plate. A pressure relief valve 11 is installed at the bottom of the pressure block 12, and the pressure relief valve 11 is perpendicular to the bottom surface of the pressure block 12. A through hole is opened on the connecting plate, and the pressure relief valve 11 passes through the through hole of the connecting plate.

[0073] Specifically, the parallel plate members are all triangular plates. A pressure block rotating shaft pin 121 is connected between the two parallel plate members.

[0074] Specifically, the bracket 122 includes a bottom plate, and two parallel plate members are respectively vertically connected to a group of opposite sides of the bottom plate. The pressure block rotating shaft pin 121 sequentially penetrates through the parallel plate members, the first pull plate 91, the second pull plate 92, and the other parallel plate member.

[0075] The first pull plate 91 and the second pull plate 92 are rotationally connected to the pressure block 12 through a pressure block pulling shaft pin 123.

[0076] Specifically, the pressure block pulling shaft pin 123 is arranged above the pressure block rotating shaft pin 121.

[0077] When the pressure block 12 is pulled by the pull plate 9 to be tilted around the pressure block rotating shaft pin 121, the pressure relief valve 11 opens.

[0078] Above the pressure block rotating shaft pin 121 of the parallel plate member of the bracket 122, a handle shaft pin 131 penetrating through the parallel plate member is further arranged, and a manual pressure relief handle 13 is rotatably connected in the handle shaft pin 131.

[0079] Specifically, the end of the manual pressure relief handle 13 is fixedly connected to the pressure block 12. When the manual pressure relief handle 13 rotates, the manual pressure relief handle 13 can jack up the pressure block 12.

[0080] The bottom of the pressure block 12 is connected with a pressure relief valve 11, the pressure relief valve 11.

[0081] Such as Figure 10As shown in the figure, when the pull plate 9 is pulled by the transition plate 3, the pressure block 12 is also pulled simultaneously. However, the pressure block 12 is fixedly connected to the bracket 122 through the pressure block rotating shaft pin 121. Therefore, under the action of the pulling force, a rotation occurs around the pressure block rotating shaft pin 121 and towards the direction of the transition plate 3. When the pressure block 12 rotates around the pressure block rotating shaft pin 121, the bottom of it rises relative to the original position. Therefore, a vertically upward pulling force is given to the pressure relief valve 11, causing the pressure relief valve 11 to open, so that the system pressure of the hydraulic spring operating mechanism is maintained at a safe value.

[0082] Embodiment 2 Based on an energy storage stroke detection and overpressure relief device in Embodiment 1, this embodiment provides a method for using the energy storage stroke detection and overpressure relief device.

[0083] As Figure 3 shown in the figure, when the hydraulic spring mechanism stores energy, the springs in the energy storage spring assembly 14 are compressed, pushing the support ring 15 to move to the right. The bent plate 6 moves horizontally to the right along with the support ring 15. The bent plate 6 drives the transition plate 3 to slide horizontally on the guide rail 8 in the direction of compression of the energy storage spring through the ball bearing joint 7, the fork 5, and the length adjustment rod 4.

[0084] The boss plate 1 slides in the same direction as the transition plate 3 simultaneously. The bosses on the boss plate 1 at different strokes sequentially drive the corresponding microswitch blade opening and closing points in the microswitch 2 to switch, outputting signals, thereby realizing the stroke monitoring of the hydraulic spring operating mechanism.

[0085] If under the normal rated pressure of the hydraulic mechanism, when the hydraulic mechanism stores energy to reach the overpressure, the corresponding microswitch blade in the microswitch 2 fails to switch normally, or the control system fails, the hydraulic mechanism will continue to store energy, the compression stroke of the energy storage spring will continue to increase, and the system oil pressure of the hydraulic mechanism will also continue to rise. At this time, the connecting shaft pin 10 passing through the transition plate 3 will pull the pull plate 9, causing the pressure block 12 to tilt, opening the pressure relief valve 11, and the system pressure of the hydraulic spring operating mechanism will no longer continue to rise and will be maintained within a safe range.

[0086] Optionally, as Figure 6 shown in the figure, in this embodiment, narrow strip-shaped plates with different lengths are assembled on the boss plate 1. The relative dimensions of the assembled strip-shaped plates are respectively the same as the relative dimensions for monitoring the energy storage strokes of the hydraulic spring operating mechanism.

[0087] Optionally, in this embodiment, energy storage stroke monitoring devices are respectively installed at both ends of the guide rail 8 for stroke control of multiple groups of energy storage springs of the hydraulic spring operating mechanism.

[0088] Embodiment 3 This embodiment is based on an energy storage stroke detection and overpressure relief device in Embodiment 1, and provides a hydraulic spring operating mechanism for a circuit breaker, including the energy storage stroke detection and overpressure relief device and a hydraulic spring operating mechanism working cylinder 16. As Figure 3 shown, the guide rail 8 is connected to the hydraulic spring operating mechanism working cylinder 16. The guide rail 8 is installed on the outer side of the hydraulic spring operating mechanism working cylinder 16. A support ring 15 is connected to the outer side of the bent plate 6. The support ring 15 is connected to the hydraulic spring operating mechanism working cylinder 16. One end of the support ring 15 facing away from the hydraulic spring operating mechanism working cylinder 16 is connected to a hydraulic spring operating mechanism energy storage spring assembly 14.

[0089] Unless otherwise specified, the equipment elements involved in the above embodiments are all conventional equipment elements. Unless otherwise specified, the structural setting methods, working methods, or control methods involved are all conventional setting methods, working methods, or control methods in the art.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. An energy storage stroke detection and overpressure relief device, characterized in that, Comprising: A bent plate (6), the bent plate (6) is connected with a transition plate (3), the top of the transition plate (3) is connected with a boss plate (1); a microswitch (2) is arranged above the boss plate (1); a guide rail (8) is arranged below the transition plate (3), and the transition plate (3) is slidably connected with the guide rail (8); a groove (33) is formed at one end of the transition plate (3), a first pull plate (91) is arranged in the groove (33), a second pull plate (92) is arranged outside the end of the transition plate (3), and the first pull plate (91) and the second pull plate (92) are connected by a connecting axle pin (10) passing through the transition plate (3); a pressing block (12) is connected between the ends of the first pull plate (91) and the second pull plate (92) through a pressing block pulling axle pin (123), and a pressure relief valve (11) is connected to the bottom of the pressing block (12).

2. The energy storage stroke detection and overpressure relief device according to claim 1, characterized in that, A ball bearing joint (7) is installed at one end of the bent plate (6), the other end of the ball bearing joint (7) is connected with a length adjusting rod (4) through a fork (5), and the other end of the length adjusting rod (4) is inserted into the transition plate (3).

3. The energy storage stroke detection and overpressure relief device according to claim 1, wherein The top of the microswitch (2) has a microswitch signal contact point (203), and the bottom is provided with a microswitch roller (202).

4. The energy storage stroke detection and overpressure relief device according to claim 1, characterized in that, A slider (801) is slidably connected to the guide rail (8), a chute matching the guide rail (8) is formed at the bottom of the slider (801), and the top of the slider (801) is connected with the transition plate (3).

5. A energy storage stroke detection and overpressure relief device according to claim 1, characterized in that The transition plate (3) includes a first plate member (31) and a second plate member (32) connected perpendicular to each other. A slider mounting hole (35) and a boss plate mounting hole (34) are formed on the plate surface of the first plate member (31); a through hole (37) along the long axis of the transition plate (3) is formed at the end of the second plate member (32) of the transition plate (3), and the connecting axle pin (10) is installed in the through hole (37).

6. The energy storage stroke detection and overpressure relief device according to claim 5, characterized in that, Strip-shaped grooves are formed on the plate surfaces of the first pull plate (91) and the second pull plate (92), and the connecting axle pin (10) passes through the strip-shaped grooves of the first pull plate (91) and the second pull plate (92) and the through holes (37) on both sides of the groove (33).

7. The energy storage stroke detection and overpressure relief device according to claim 6, characterized in that, Fine adjustment screws (901) are installed at the ends of the first pull plate (91) and the second pull plate (92).

8. A energy storage stroke detection and overpressure relief device according to claim 1, characterized in that, A bracket (122) is arranged outside the pressing block (12). The bracket (122) includes a group of opposite parallel plate members. The bottoms of the two parallel plate members are connected by a connecting plate. A pressing block rotating axle pin (121) passing through the pressing block (12) is connected between the two parallel plate members, and the pressing block pulling axle pin (123) is arranged above the pressing block rotating axle pin (121).

9. A method for using an energy storage stroke detection and overpressure relief device according to any one of claims 1 to 8, characterized in that, Including the following steps: Drive the transition plate (3) to move through the bent plate (6), so that the bosses with different strokes on the boss plate (1) sequentially drive the opening and closing points conversion of the corresponding microswitch pieces in the microswitch (2), and output signals through the microswitch (2). When the hydraulic mechanism is under normal rated pressure, if the corresponding microswitch piece in the microswitch (2) fails to switch normally when the energy storage of the hydraulic mechanism reaches overpressure, or if there is a fault in the control system, the transition plate (3) continues to be pulled by the bent plate (6), and the pull plate (9) is pulled through the connecting shaft pin (10), causing the pressure block (12) to tilt and opening the pressure relief valve (11), so that the system pressure of the hydraulic spring operating mechanism no longer continues to rise.

10. A hydraulic spring operating mechanism for a circuit breaker, characterized in that, It includes an energy storage stroke detection and overpressure relief device according to any one of claims 1 to 8 and a working cylinder (16) of a hydraulic spring operating mechanism; the outer side of the bent plate (6) is connected to the working cylinder (16) of the hydraulic spring operating mechanism through a support ring (15), and one end of the support ring (15) facing away from the working cylinder (16) of the hydraulic spring operating mechanism is connected with an energy storage spring assembly (14) of the hydraulic spring operating mechanism.

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