An integrated hydraulic spring operating mechanism for high voltage circuit breaker

Abstract

The present invention provides an integrated hydraulic spring operating mechanism for a high-voltage circuit breaker, comprising a main oil cylinder 10, an oil tank 4, a piston cylinder 20, a piston rod 1, and a disc spring group 21, wherein the oil tank 4 is fixed at one end of the main oil cylinder 10 and the two are connected; the piston cylinder 20 is installed on the outside of the main oil cylinder 10 and can reciprocate along the main oil cylinder 10, and the piston rod 1 passes through the oil tank 4 and enters the piston oil hole 35 at the axis of the main oil cylinder 10 and can reciprocate along the piston oil hole 35; the disc spring group 21 is arranged on the piston cylinder 10; the other end of the main oil cylinder 10 is sealed; a control valve is arranged in the main oil cylinder 10, the control valve is arranged in the valve body oil hole 119, and the control valve includes a long valve sleeve 57, a short valve sleeve 63 and a valve core 61; a crankshaft assembly is arranged in the oil tank 5, and the crankshaft assembly is respectively connected to two oil pumps 49 and a motor 106; the two oil pumps 49 are respectively connected to the main oil cylinder 10 through the oil hole u95 and the oil hole e34.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage power transmission and transformation equipment, and in particular relates to an integrated hydraulic spring operating mechanism for a high-voltage circuit breaker. Background Art

[0002] The hydraulic spring operating mechanism is an important equipment in the field of high-voltage power transmission and transformation, and an important component of high-voltage circuit breakers. The closing and opening operations of high-voltage circuit breakers are achieved through the control of the operating mechanism. The hydraulic spring operating mechanism has the characteristics of fast and stable action, reliable structure, intuitive principle, and less maintenance, and is suitable for large-scale use on high-voltage circuit breakers.

[0003] At present, the hydraulic spring operating mechanism used in high-voltage circuit breakers is to assemble the functional unit blocks of each separate body on the main cylinder body, which has problems such as complex structure, many parts, many sealing connections, poor mechanical structure reliability, and large size. In terms of performance, since the assembly of each functional unit requires many connecting oil circuits, the local pressure loss is large, resulting in reduced transmission efficiency. With the development of the national power system, the continuous increase in system capacity, the continuous increase in transmission voltage, and the advancement of circuit breaker technology, it is urgent to develop a new type of hydraulic spring operating mechanism that can match the existing national power grid power system with short opening and closing time, stable mechanical characteristics, large output power, strong structure, and small size. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an integrated hydraulic spring operating mechanism for a high-voltage circuit breaker, which has the advantages of fast speed, high power, stable characteristics, etc. The technical solution of the present invention is as follows:

[0005] An integrated hydraulic spring operating mechanism for a high-voltage circuit breaker comprises a main oil cylinder, an oil tank, a piston cylinder, a piston rod, and a disc spring group, wherein the oil tank is fixed to one end of the main oil cylinder and the two are connected, and the other end of the main oil cylinder is sealed; the piston cylinder is installed on the outside of the main oil cylinder and can reciprocate along the main oil cylinder, the piston rod passes through the oil tank and enters the piston oil hole at the axis of the main oil cylinder and can reciprocate along the piston oil hole; the disc spring group is arranged on the piston cylinder;

[0006] A control valve is provided in the main oil cylinder, and the control valve is arranged in the oil hole of the valve body. The control valve comprises a long valve sleeve, a short valve sleeve and a valve core, and the long valve sleeve, the short valve sleeve and the valve core are coaxially arranged with the oil hole of the valve body; the valve core is inserted into the axial center holes of the long valve sleeve and the short valve sleeve; the long valve sleeve and the short valve sleeve are respectively located at the upper side and the lower side of the oil hole of the valve body, and locking covers are respectively provided at both ends of the oil hole of the valve body, and the locking covers are threadedly fixed to the main oil cylinder, and the locking covers are used to seal the long valve sleeve and the short valve sleeve in the oil hole of the valve body; the valve core can move up and down along the oil hole of the valve body; the long valve sleeve is provided with a long valve sleeve oil hole for communicating with the oil hole of the valve body, and the short valve sleeve is also provided with a short valve sleeve oil hole for communicating with the oil hole of the valve body; the valve core is provided with a valve core oil hole connected with the oil hole of the valve body;

[0007] The left side of the oil tank is sealed by an oil tank cover, and the oil tank cover is provided with a through hole for the piston rod to pass through; the oil tank is provided with an oil inlet nozzle and an oil outlet nozzle; a motor is provided at the bottom of the oil tank, and a crankshaft assembly is provided in the oil tank, and the crankshaft assembly is respectively connected to two oil pumps and the motor; the two oil pumps are respectively connected to the main oil cylinder through oil holes u and oil holes e.

[0008] Furthermore, a main body oil cylinder sealing ring is provided on the outer circumferential surface of the main body oil cylinder.

[0009] Furthermore, a piston rod sealing ring is provided on the piston rod.

[0010] Furthermore, the piston oil hole is located on the side where the piston rod is installed and is sequentially provided with a threaded sleeve, a limit sleeve and a closing reduction sleeve, and the other side of the piston oil hole is provided with an opening reduction sleeve, and the space between the closing reduction sleeve and the opening reduction sleeve forms the reciprocating motion space of the piston rod.

[0011] Furthermore, a limiting sleeve sealing ring b and a limiting sleeve sealing ring c are arranged on the outer surface of the limiting sleeve, and a limiting sleeve sealing ring a and a limiting sleeve guide ring are arranged on the inner hole surface.

[0012] Furthermore, two piston cylinder guide rings are arranged on the inner surface of the piston cylinder.

[0013] Furthermore, the fuel tank cover is provided with a fuel tank guide ring, a fuel tank sealing ring c, a fuel tank sealing ring a and a fuel tank sealing ring b.

[0014] Furthermore, a short valve sleeve outer sealing ring and a short valve sleeve inner sealing ring are arranged on the outer circle of the short valve sleeve, a long valve sleeve inner sealing ring, a long valve sleeve middle sealing ring and a long valve sleeve outer sealing ring are arranged on the long valve sleeve, and a valve core sealing ring a and a valve core sealing ring b are arranged on the outer diameter of the valve core.

[0015] Furthermore, a ball top mechanism is provided on the long valve sleeve, and the number of the ball top mechanisms is 3. The three ball top mechanisms are respectively installed in radial holes evenly distributed at 120° at the lower end of the long valve sleeve. Each of the ball top mechanisms includes a ball top screw, a ball top spring and a fixing seat connected in sequence. The fixing seat is threadedly fixed to the long valve sleeve. The three ball top screws support the spherical surface of the lower end of the valve core under the action of the three ball top springs.

[0016] Furthermore, the crankshaft assembly includes a crankshaft, which is installed in a crankshaft sleeve and extends to the outside of the oil tank, and is connected to a large gear arranged outside the oil tank, and the large gear is meshed and connected with a small gear arranged on the motor; the oil pump is arranged above the crankshaft.

[0017] Furthermore, a shaft seal, a crankshaft sleeve sealing ring and a pressure cover are provided at one end of the crankshaft sleeve, the shaft seal and the crankshaft sleeve sealing ring are used to seal the crankshaft, the pressure cover is fixed to the oil tank with screws, and the pressure cover is used to limit the crankshaft.

[0018] Furthermore, a pressure relief assembly is provided in the oil tank, and the pressure relief assembly includes a crank arm shaft, one end of which is mounted on a flanged bearing; an inner crank arm and an outer crank arm are provided on the crank arm shaft, the inner crank arm is placed in the oil tank, and the outer crank arm is located outside the oil tank, and the inner crank arm and the outer crank arm rotate synchronously.

[0019] Furthermore, the pressure relief assembly also includes a safety valve assembly, which includes an upper safety valve seat, a lower safety valve seat and a safety valve stem, wherein the upper safety valve seat and the lower safety valve seat are arranged in the safety valve oil hole; the upper safety valve seat is threadedly fixed to the main oil cylinder and is sealed by an upper valve seat sealing ring; a spring is also sleeved on the outside of the upper safety valve seat, and the two ends of the spring respectively support the inner crank arm and the end surface of the main oil cylinder; the safety valve stem is installed in the central through hole of the upper safety valve seat, and the steel ball and the lower valve seat spring are placed in the inner hole of the lower safety valve seat, and the steel ball supports the central small hole of the upper safety valve seat under the action of the lower valve seat spring for sealing; when the outer crank arm drives the inner crank arm to rotate, the safety valve stem pushes the steel ball to break the seal.

[0020] Furthermore, the main oil cylinder is provided with a closing speed regulating valve and an opening speed regulating valve, the closing speed regulating valve comprises a speed regulating valve stem a, the speed regulating valve stem a is inserted into the oil hole z, the oil hole z is communicated with the oil hole u; the speed regulating valve stem a is threadedly connected with a fixing seat a, and the fixing seat a is fixed to the main oil cylinder by screws. When the speed regulating valve stem a is rotated, the right end of the speed regulating valve stem a will penetrate into or withdraw from the oil hole z, and can throttle the oil hole u, thereby playing the role of the closing speed regulating valve. Function: The gate-opening speed regulating valve comprises a speed regulating valve stem b, which is inserted into an oil hole t. The oil hole t is communicated with the oil hole of the short valve sleeve, and the oil hole t is also communicated with the oil tank through an oil hole s. The speed regulating valve stem b is threadedly connected with a fixing seat b, and the fixing seat b is fixed to the main oil cylinder by screws. When the speed regulating valve stem b is rotated, the left end of the speed regulating valve stem b will penetrate into or withdraw from the oil hole t, and can throttle the oil hole s, thereby playing the role of a gate-opening speed regulating valve.

[0021] Furthermore, a limiting flange and a stabilizing flange are respectively provided at both ends of the disc spring group, the limiting flange is fixed on the piston cylinder, the stabilizing flange is connected to the tail fixing flange, and the tail fixing flange is fixed on the main oil cylinder.

[0022] Furthermore, a piston cylinder sealing ring a, a piston cylinder sealing ring b and a piston cylinder sealing ring c are provided on the inner surface of the piston cylinder.

[0023] Furthermore, the piston cylinder is also provided with a piston cylinder flange, and the piston cylinder flange is limited by a fixing ring and the limiting flange respectively provided on both sides thereof, and the fixing ring is fixed on the left side of the piston cylinder.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the hydraulic spring operating mechanism of the present invention is a new type of hydraulic control device that integrates a control valve and a speed regulating valve, which has the advantages of short opening and closing time, stable mechanical characteristics, large output power, solid structure, and small size, and can be matched with the existing national power grid power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional schematic diagram of the integrated hydraulic spring operating mechanism of the present invention.

[0026] Figure 2 This is a schematic diagram of the AA section of the hydraulic spring operating mechanism of the present invention (opening position). (The oil holes indicated by 74, 75, 78, and 79 are perspective views)

[0027] Figure 3 It is a schematic cross-sectional view of the hydraulic spring operating mechanism BB of the present invention.

[0028] Figure 4It is a schematic diagram of the AA section of the hydraulic spring operating mechanism of the present invention (closing position).

[0029] Figure 5 It is a partial CC cross-sectional schematic diagram of the main cylinder of the hydraulic spring operating mechanism of the present invention;

[0030] Figure 6 It is a cross-sectional schematic diagram of the main oil cylinder DD of the hydraulic spring operating mechanism of the present invention;

[0031] Figure 7 It is a schematic diagram of the main cylinder of the hydraulic spring operating mechanism of the present invention in the X direction;

[0032] Figure 8 It is a cross-sectional schematic diagram of the main oil cylinder EE of the hydraulic spring operating mechanism of the present invention;

[0033] Fig. 9 It is a cross-sectional schematic diagram of the main oil cylinder FF of the hydraulic spring operating mechanism of the present invention;

[0034] Fig.10 It is a partial schematic diagram of the main cylinder of the hydraulic spring operating mechanism of the present invention in the Z direction;

[0035] Fig.11 It is a cross-sectional schematic diagram of the main oil cylinder GG of the hydraulic spring operating mechanism of the present invention;

[0036] Fig.12 It is a schematic cross-sectional view of the main oil cylinder HH of the hydraulic spring operating mechanism of the present invention.

[0037] Figure 1-121. Piston rod, 2. Oil tank cover, 3. Oil tank seal a, 4. Oil inlet nozzle, 401, oil outlet nozzle, 5. Oil tank, 6. Oil tank seal b, 7. Process plug, 8. Process plug seal, 9. Locking cover, 10. Main oil cylinder, 11. Piston cylinder flange, 12. Fixed ring, 13. Piston cylinder seal a, 14. Piston cylinder oil hole a, 15. Piston cylinder oil hole b, 16. Piston cylinder oil hole c, 17. Main oil cylinder seal, 18. Piston cylinder seal b, 19. Piston cylinder seal c, 20. Piston cylinder, 21. Disc spring assembly, 22. Oil hole a, 23. Tail fixing flange, 24. Stabilizing flange, 25. Oil cylinder plug, 26. Oil cylinder plug outer seal, 27. Oil hole b, 28. Oil hole c, 29. Oil cylinder plug inner seal Sealing ring, 30, opening reduction sleeve, 31, piston rod sealing ring, 32, piston cylinder guide ring b, 33, oil hole d, 34, oil hole e, 35, piston oil hole, 36, limit flange, 37, closing reduction sleeve, 38, piston cylinder guide ring a, 39, limit sleeve sealing ring c, 40, limit sleeve side oil hole, 41, oil hole g, 42, limit sleeve, 43, limit sleeve sealing ring b, 44, limit sleeve guide ring, 45, side oil hole, 46, limit sleeve sealing ring a, 47, threaded sleeve, 48, crankshaft, 49, oil pump, 50, long valve sleeve oil hole c, 51, crankshaft sleeve, 52, valve core oil hole a, 53, oil tank guide ring, 54, oil tank sealing ring c, 55, pressure surface, 56, valve core oil hole b, 57, long valve sleeve, 58, fixed seat , 59, ball top spring, 60, ball top wire, 61, valve core, 62, valve core sealing ring a, 63, short valve sleeve, 64, valve core sealing ring b, 65, short valve sleeve outer sealing ring, 66, short valve sleeve inner sealing ring, 67, long valve sleeve inner sealing ring, 68, long valve sleeve oil hole a, 69, long valve sleeve middle sealing ring, 70, long valve sleeve outer sealing ring, 71, fixed seat a, 72, speed control valve stem a, 73, long valve sleeve oil hole b, 74, oil hole y, 75, oil hole j, 76, sealing plug, 77, oil hole k, 78, oil hole l, 79, oil hole m, 80, oil hole n, 81, oil hole o, 82, oil hole p, 83, oil hole q, 84, oil hole r, 85, solenoid valve a, 86, solenoid valve b, 87, solenoid valve c, 88, speed control valve stem b, 89, fixed seat b, 90, speed regulating valve stem b sealing ring, 91, speed regulating valve stem a sealing ring, 92, oil hole s, 93, oil hole t, 94, inner crank arm, 95, oil hole u, 96, crank arm shaft, 97, crank arm shaft sealing ring, 98, outer crank arm, 99, shaft seal, 100, bearing, 101, crankshaft sleeve sealing ring, 102, flange bearing, 103, pressure cover, 104, large gear, 105, small gear, 106, motor, 107, spring, 108, safety valve stem, 109, upper safety valve seat, 110, upper valve seat sealing ring, 111, long valve sleeve oil hole d, 112, steel ball, 113, lower valve seat spring, 114, lower safety valve seat, 115, oil hole v, 116, short valve sleeve oil hole, 117, oil hole w,118, oil hole x, 119, valve body oil hole, 120, oil hole z, 121, short valve sleeve valve port, 122, long valve sleeve valve port, 123, top plate, 124, safety valve oil hole. DETAILED DESCRIPTION

[0038] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present invention. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "connected", and "communicated" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two elements, it can be a wireless connection, or it can be a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, which are intended to explain the present invention rather than to limit it.

[0040] like Figure 1 As shown, a specific embodiment of the present invention provides an integrated hydraulic spring operating mechanism for a high-voltage circuit breaker, comprising a main oil cylinder 10, an oil tank 5, a piston cylinder 20, a piston rod 1, and a disc spring group 21. The oil tank 5 is fixed to one end of the main oil cylinder 10 and the oil tank 5 and the main oil cylinder 10 are in communication; the other end of the main oil cylinder 10 is sealed. The piston cylinder 20 is installed outside the main oil cylinder 10 and can reciprocate along the main oil cylinder 10. The piston rod 1 passes through the oil tank 5 and enters the piston oil hole 35 at the axis of the main oil cylinder 10 and can reciprocate along the piston oil hole 35; the disc spring group 21 is arranged on the piston cylinder 20.

[0041] The hydraulic spring operating mechanism is based on the main oil cylinder 10 as the core component, the piston rod 1 is installed in the piston oil hole 35 at the axis of the main oil cylinder 10, the threaded sleeve 47, the limit sleeve 42 and the closing reduction sleeve 37 are installed on the left side of the piston rod 1 in sequence and placed together in the piston oil hole 35, the opening reduction sleeve 30 and the cylinder plug 25 are installed on the right side of the piston rod 1 in sequence and placed together in the piston oil hole 35, the threaded sleeve 47 on the left side is threadedly fixed with the main oil cylinder 10, and the cylinder plug 25 on the right side is fixed with the main oil cylinder 10 by bolts, so that the piston rod 1 is limited in the piston oil hole 35 of the main oil cylinder 10. The outer surface of the limit sleeve 42 is provided with a limit sleeve sealing ring b43 and a limit sleeve sealing ring c39, and the inner hole surface is provided with a limit sleeve sealing ring a46 and a limit sleeve guide ring 44; the outer surface of the left end of the cylinder plug 25 is provided with a cylinder plug outer sealing ring 29 and a cylinder plug outer sealing ring 26; the piston rod 1 is provided with a piston rod sealing ring 31.

[0042] The piston cylinder 20 is installed outside the main oil cylinder 10, and the step formed by the difference in diameter between the two parts is used for positioning. The circular cross section of the step (the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10) is the pressure-bearing surface 55. The inner surface of the piston cylinder 20 is provided with a piston cylinder guide ring b32 and a piston cylinder guide ring a38. The inner surface of the piston cylinder 20 is provided with a piston cylinder sealing ring a13 and a piston cylinder sealing ring b18 and a piston cylinder sealing ring c19, and the outer surface of the main oil cylinder 10 is provided with a main oil cylinder sealing ring 17. The piston cylinder 20 is provided with oil holes connected in the direction: piston cylinder oil hole a14, piston cylinder oil hole b15, piston cylinder oil hole c16, and the oil hole connected to one end of the outer surface of the piston cylinder 20 is welded and sealed.

[0043] like Figure 2 and 4As shown, a control valve is provided in the main oil cylinder 10, and the control valve is arranged in the valve body oil hole 119. The control valve includes a long valve sleeve 57, a short valve sleeve 63 and a valve core 61. The long valve sleeve 57, the short valve sleeve 63 and the valve core 61 are coaxially arranged with the valve body oil hole 119; the valve core 61 is installed in the axial center holes of the long valve sleeve 57 and the short valve sleeve 63; the long valve sleeve 57 and the short valve sleeve 63 are respectively located at the upper side and the lower side of the valve body oil hole 119, and locking members are respectively provided at both ends of the valve body oil hole 119. Cover 9, locking cover 9 is threadedly fixed with the main oil cylinder 10, and the locking cover 9 is used to seal the long valve sleeve 57 and the short valve sleeve 63 in the valve body oil hole 119; the valve core 61 can move up and down along the valve body oil hole 119; the long valve sleeve 57 is provided with a long valve sleeve oil hole for connecting to the valve body oil hole 119; long valve sleeve oil hole a68, long valve sleeve oil hole b73, long valve sleeve oil hole c50, long valve sleeve oil hole d111, and the upper end surface of the long valve sleeve 57 and the inner hole are chamfered to form the long valve sleeve valve port 122. The short valve sleeve 63 is also provided with a short valve sleeve oil hole: short valve sleeve oil hole 116 for communicating with the valve body oil hole 119. The lower end surface of the short valve sleeve 63 and the inner hole are chamfered to form a short valve sleeve valve port 121. The valve core 61 is provided with valve core oil holes: valve core oil hole a52 and valve core oil hole b56, which are connected to the valve body oil hole 119. The valve core oil hole a52 and the valve core oil hole b56 are connected. The short valve sleeve 63 is provided with a short valve sleeve outer sealing ring 65 and a short valve sleeve inner sealing ring 66 on the outer circle. The long valve sleeve 57 is provided with a long valve sleeve inner sealing ring 67, a long valve sleeve middle sealing ring 69 and a long valve sleeve outer sealing ring 70. The valve core 61 is provided with a valve core sealing ring a62 and a valve core sealing ring b64 on the outer diameter.

[0044] In order to better limit the valve core 61, a ball top mechanism is provided on the long valve sleeve 57. There are three ball top mechanisms, which are respectively installed in radial holes evenly distributed at 120° at the lower end of the long valve sleeve 57. Each ball top mechanism includes a ball top screw 60, a ball top spring 59 and a fixing seat 58 connected in sequence. The fixing seat 58 is threadedly fixed to the long valve sleeve 57. The three ball top screws 60 support the spherical surface of the lower end of the valve core 61 under the action of the three ball top springs 59.

[0045] like Figure 1 and 3As shown, the oil tank 5 is installed at the left end of the main oil cylinder 10, the oil tank cover 2 is set on the left end face of the oil tank 5, and the left end of the piston rod 1 passes through the oil tank and extends out from the hole in the middle of the oil tank cover 2. The oil tank guide ring 53, oil tank sealing ring c54, oil tank sealing ring a3 and oil tank sealing ring b6 are set on the oil tank cover 2, and the upper and lower sides of the oil tank 5 are provided with an oil inlet nozzle 4 and an oil outlet nozzle 401 for filling and draining hydraulic oil for the equipment. A motor 106 is set below the oil tank 5, and a crankshaft assembly is set in the oil tank 5. The crankshaft assembly is respectively connected to two oil pumps 49 and the motor 106; the two oil pumps 49 are respectively connected to the main oil cylinder 10 through the oil hole u95 and the oil hole e34. The crankshaft assembly includes a crankshaft 48, which is installed in a crankshaft sleeve 51 and extends to the outside of the oil tank, and is connected to a large gear 104 arranged outside the oil tank 5. The large gear 104 is meshed and connected with a small gear 105 arranged on the motor; the oil pump is arranged above the crankshaft 48. Two identical bearings 100 are respectively arranged in the inner holes at the left and right ends of the crankshaft sleeve 51, and a flanged bearing 102 is arranged in the installation hole between the left end of the crankshaft 48 and the oil tank 5. A shaft seal 99, a crankshaft sleeve sealing ring 101 and a pressure cover 103 are arranged at the right end of the crankshaft sleeve 51. The shaft seal 99 and the crankshaft sleeve sealing ring 101 are used to seal the crankshaft 48. The pressure cover 103 is fixed to the oil tank 5 with screws, and the pressure cover is used to limit the crankshaft 48.

[0046] like Figure 3 and 5 As shown, a pressure relief assembly is also provided in the oil tank 5, and the pressure relief assembly includes a crank arm shaft 96, which is arranged in the oil tank 5, and the right end of the crank arm shaft 96 is inserted into the flange bearing 102, the inner crank arm 94 is inserted and positioned at the right end of the crank arm shaft 96, and the outer crank arm 98 is inserted and positioned at the left end of the crank arm shaft 96 and placed outside the oil tank 5, and a crank arm shaft sealing ring 97 is provided on the crank arm shaft 96 for sealing. The outer crank arm 98 and the inner crank arm 94 rotate synchronously. The pressure relief assembly also includes a safety valve assembly, which includes an upper safety valve seat 109, a lower safety valve seat 114 and a safety valve stem 108. The upper safety valve seat 109 and the lower safety valve seat 114 are arranged in the safety valve oil hole 124. The upper safety valve seat 109 is threadedly fixed to the main oil cylinder 10. The upper valve seat sealing ring 110 is arranged on the outer circle of the upper safety valve seat 109. The safety valve stem 108 is inserted into the central through hole of the upper safety valve seat 109. The safety valve stem 108 is located between the inner crank arm 94 and the steel ball 112. The spring 107 is sleeved on the outside of the upper safety valve seat 109, one end of which is against the inner crank arm 94, and the other end is against the end surface of the main oil cylinder 10. The steel ball 112 and the lower valve seat spring 113 are placed in the inner hole of the lower safety valve seat 114. Under the action of the lower valve seat spring 113, the steel ball 112 is against the central small hole of the upper safety valve seat 109 for sealing. When the outer turning arm 98 drives the inner turning arm 94 to rotate, the safety valve stem 108 pushes the steel ball 112 to break the seal.

[0047] like Figure 2 and 4As shown, the main oil cylinder 10 is provided with a closing speed regulating valve and an opening speed regulating valve. The closing speed regulating valve includes a speed regulating valve stem a72, which is inserted into the oil hole z120, and the oil hole z120 is communicated with the oil hole u95; the speed regulating valve stem a72 is threadedly connected with the fixing seat a71, and the fixing seat a71 is fixed to the main oil cylinder 10 by screws. When the speed regulating valve stem a72 is rotated, the right end of the speed regulating valve stem a72 will penetrate into or withdraw from the oil hole z120, and can throttle the oil hole u95, thereby playing the role of the closing speed regulating valve. Use: the gate-opening speed regulating valve includes a speed regulating valve stem b88, the speed regulating valve stem b88 is inserted into the oil hole t93, the oil hole t93 is communicated with the short valve sleeve oil hole 116, and the oil hole t93 is also communicated with the oil tank 5 through the oil hole s92; the speed regulating valve stem b88 is threadedly connected with the fixing seat b89, and the fixing seat b89 is fixed on the main oil cylinder 10 by screws. When the speed regulating valve stem b88 is rotated, the left end of the speed regulating valve stem b88 will penetrate into or withdraw from the oil hole t93, and can throttle the oil hole s92, thereby playing the role of a gate-opening speed regulating valve.

[0048] like Figure 1 As shown, the limiting flange 36 and the stabilizing flange 24 are respectively arranged on the left and right end surfaces of the disc spring assembly 21, the limiting flange 36 is clamped on the boss on the piston cylinder 20, the stabilizing flange 24 is fitted with the tail fixing flange 23, and the tail fixing flange 23 is threadedly fixed to the right end of the main oil cylinder 10; under the elastic potential energy of the disc spring assembly 21, the piston cylinder 20 and the main oil cylinder 10 are pressed together. The fixing ring 12 is threadedly fixed to the left end of the piston cylinder 20, and the piston cylinder flange 11 is installed on the piston cylinder 20 and is limited by the fixing ring 12 and the limiting flange 36.

[0049] like Figure 2 and 4 As shown, the solenoid valve C87, the solenoid valve B86 and the solenoid valve A85 are screwed on the right end surface of the main oil cylinder 10. The solenoid valve C87, the solenoid valve B86 and the solenoid valve A85 are one-way valves controlled by electromagnets. The solenoid valve C87 is responsible for controlling the closing oil circuit. When the electromagnet is energized, the oil hole K77 and the oil hole L78 are connected. After the power is off, the connection between the oil hole K77 and the oil hole L78 is blocked; the solenoid valve B86 is responsible for controlling the opening oil circuit. When the electromagnet is energized, the oil hole M79 and the oil hole Q83 are connected. After the power is off, the connection between the oil hole M79 and the oil hole Q83 is blocked; the solenoid valve A85 is also responsible for controlling the opening oil circuit. When the electromagnet is energized, the oil hole N80 and the oil hole R84 are connected. After the power is off, the connection between the oil hole N80 and the oil hole R84 is blocked.

[0050] like Figure 1 As shown, the operating mechanism is also provided with a process plug, on which a process plug sealing ring 8 is arranged, which is inserted into the end face of the main oil cylinder 10 at the left end of the oil hole 22a and the end face of the main oil cylinder 10 at the oil hole g41, and the process plug 7 is fixed to the main oil cylinder 10 by threads.

[0051] In addition, if Figure 2 , 4 As shown, the oil holes y74 and j75 on the outer surface of the main oil cylinder 10 are sealed with sealing plugs 76 and fixed with top plates 123 and screws.

[0052] like Figure 6 , 7 As shown in Figures 8 and 8, the main oil cylinder 10 is a main part mainly composed of a cube, large and small cylindrical bosses from left to right. The cube is mainly responsible for setting the reversing valve, the electromagnetic pilot valve, and the opening and closing speed regulating valve. The large and small cylindrical bosses are mainly responsible for setting the piston cylinder 20 and the disc spring group 21. The piston oil hole 35 at the internal axis of the main oil cylinder 10 is responsible for setting the piston rod 31.

[0053] like Figure 3 , 7 As shown, the oil hole s92 provided on the end surface of the main oil cylinder 10x is connected to the oil hole t93, and the safety valve oil hole 124 is connected to the valve body oil hole 119 through the oil hole v115. Figure 1 , 2 As shown in , 8, the oil hole a22 is connected to the valve body oil hole 119 and the side oil hole 45 in sequence, and then connected to the piston oil hole 35 through the side oil hole 45. (As shown in Fig. 9 , 10 ) The oil hole 41 is connected to the oil hole e34, the piston oil hole 35 and the oil hole u95 in sequence. In addition, in a specific embodiment of the present invention, as Figure 1 , 2 As shown in Figures 3, 7 and 8, the interconnected relationships among the other oil holes are as follows: the oil hole e34 is connected with the oil hole k77, the oil hole l78, the oil hole j75, the oil hole y74 and the long valve sleeve oil hole c50 in sequence; the oil hole e33 is connected with the oil hole e34, the oil hole g41, the oil hole u95, the long valve sleeve oil hole d111 and the valve body oil hole 119 in sequence, and then connected with the oil hole a22, the side oil hole 45, the oil hole c28, the oil hole b27 and the piston oil hole 35 through the long valve sleeve valve port 122; the side oil hole 40 of the limit sleeve is connected with the oil hole g41 and the piston oil hole 35 respectively; the oil hole b27 is connected with the oil hole c28, the side oil hole 45, the oil hole a22 and the valve body oil hole 119 in sequence, and then connected with the short valve sleeve oil hole 116, the oil hole t93 and the oil hole s92 through the short valve sleeve valve port 121.

[0054] The gaps between the various parts in the present invention and the spaces inside and outside the parts will form a corresponding closed space after cooperating with the various sealing rings, which can be divided into three spaces: a high-pressure chamber, a low-pressure chamber, and a variable-pressure chamber; the high-pressure chamber refers to the space inside the equipment that is filled with high-pressure hydraulic oil after energy storage; the low-pressure chamber refers to the space inside the equipment that is always filled with pressure-free hydraulic oil; the variable-pressure chamber refers to the space inside the equipment where the hydraulic oil pressure can change, that is, the space is filled with high-pressure hydraulic oil when connected to the high-pressure chamber, and is filled with pressure-free hydraulic oil when connected to the low-pressure chamber. (such as Figure 2) When the valve core 61 fits with the long valve sleeve 57, the long valve sleeve valve port 122 is closed and the short valve sleeve valve port 121 is opened, and the variable pressure chamber is connected to the low pressure chamber. Figure 4 ) When the valve core 61 fits with the short valve sleeve 63, the valve port 121 of the short valve sleeve is closed and the valve port 122 of the long valve sleeve is opened, and the variable pressure chamber is connected with the high pressure chamber.

[0055] High-pressure chamber: 1) The sealed space inside the piston oil hole 35 of the main oil cylinder 10, on the left side of the piston rod seal 31, and on the right side of the limit sleeve seal b43 and the limit sleeve seal a46; 2) The sealed space between the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10, on the right side of the main oil cylinder seal 17 and on the left side of the piston cylinder seal b18; 3) The space inside the outer valve sleeve oil hole 119 of the long valve sleeve 57 between the inner seal 67 of the long valve sleeve and the middle seal 69 of the long valve sleeve; 4) The space above the valve core seal a62 inside the short valve sleeve 63; 5) The space above the valve core seal a62 inside the long valve sleeve 5 7) The space below the long valve sleeve valve port 122 above the valve core sealing ring b64; 6) The sealed space on the right side of the upper valve seat sealing ring 110 and the steel ball 112 in the safety valve oil hole 124 on the left end face of the main oil cylinder 10; 7) And the oil circuit hole spaces connecting these spaces such as: valve core oil hole a52, valve core oil hole b56, long valve sleeve oil hole d111, limit sleeve side oil hole 40, oil hole g41, oil hole d33, oil hole e34, oil hole u95, oil hole g41, oil hole z120, oil hole k77, oil hole v115, safety valve oil hole 124.

[0056] Low-pressure chamber: 1) Between the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10, the sealing space on the right side of the piston cylinder seal ring a13 and the left side of the main oil cylinder seal ring 17, and the sealing space on the right side of the piston cylinder seal ring b18 and the left side of the piston cylinder seal ring c19; 2) The sealing space inside the oil tank 5, on the right side of the oil tank cover 2 and on the left side of the main oil cylinder 10; 3) Between the short valve sleeve outer seal ring 65 and the short valve sleeve inner seal ring 66, and the valve body oil hole outside the short valve sleeve 63 119; 4) the sealed space within the short valve sleeve 63 and below the valve core sealing ring b64 and above the short valve sleeve valve port 121; 5) and the oil circuit hole spaces connecting these spaces such as: piston cylinder oil hole a14, piston cylinder oil hole b15, piston cylinder oil hole c16, short valve sleeve oil hole 116, oil hole w117, oil hole x118, oil hole o81, oil hole p82, oil hole q83, oil hole r84, oil hole t93 and oil hole s92.

[0057] Pressure-changing chamber: 1) The sealed space inside the piston oil hole 35 of the main oil cylinder 10, on the right side of the piston rod seal ring 31, and on the left side of the cylinder plug outer seal ring 26; 2) The sealed space inside the oil hole a22 on the right side of the process plug a seal ring 8; 3) The sealed space between the short valve sleeve inner seal ring 66 and the long valve sleeve inner seal ring 67 in the valve body oil hole 119, and between the short valve sleeve valve port 121 and the long valve sleeve valve port 122; 4) The sealed space outside the long valve sleeve 57 in the valve body oil hole 119, and the long valve sleeve valve port 122 The sealed space between the sealing ring 69 in the sleeve and the outer sealing ring 70 of the long valve sleeve; 5) The sealed space within the long valve sleeve 57 and under the valve core sealing ring a62; 6) And the oil path hole spaces connecting these spaces such as: side oil hole 45, oil hole b27, oil hole c28, side oil hole 45, oil hole y74, oil hole j75, oil hole l78, oil hole m79, oil hole n80, long valve sleeve oil hole c50, long valve sleeve oil hole a68, long valve sleeve oil hole b73.

[0058] like Figure 1 As shown, the piston rod 1 can move left and right with the assistance of the limit sleeve guide ring 44 and the oil tank guide ring 53. When the pressure in the high-pressure chamber and the transformer chamber on both sides of the piston rod sealing ring 31 is the same, the piston rod 1 moves to the left until it is in contact with the closing reduction sleeve 37. When the pressure in the transformer chamber on the right side of the piston rod sealing ring 31 disappears, the piston rod 1 moves to the right until it is in contact with the opening reduction sleeve 30.

[0059] like Figure 1 As shown, the piston cylinder 20 can slide coaxially left and right outside the main cylinder 10 with the assistance of the piston cylinder guide ring b32 and the piston cylinder guide ring a38, and is limited by the outer boss of the main cylinder 10.

[0060] like Figure 2 , 4 As shown, the valve core 61 can move coaxially up and down in the long valve sleeve 57 and the short valve sleeve 63, and the valve core 61 is limited by the long valve sleeve valve port 122 on the long valve sleeve 57 and the short valve sleeve valve port 121 on the short valve sleeve 63. Figure 4 When the valve core 61 fits the short valve sleeve 63, the valve port 121 of the short valve sleeve is closed and sealed, and the valve port 122 of the long valve sleeve is opened. Figure 2 ) When the valve core 61 fits against the long valve sleeve 57, the valve port 122 of the long valve sleeve is closed and sealed, and the valve port 121 of the short valve sleeve is opened.

[0061] The working principle of the spring operating mechanism of the present invention is:

[0062] Energy storage process: (such as Figure 1 , 3(As shown) the motor 106 is powered on and rotates, driving the crankshaft 48 to rotate through the large gear 104 and the small gear 105. The crankshaft 48 rotates and compresses the two oil pumps 49 to fill the hydraulic oil in the oil tank 5 into the high-pressure chamber through the oil holes e34, u95 and d33. As the hydraulic oil is filled, the hydraulic oil pushes the piston cylinder 20 to move to the right, thereby compressing the disc spring group 21. Under the action of the elastic potential energy of the disc spring group 21, the pressure of the hydraulic oil in the high-pressure chamber increases. After the motor 106 stops, with the cooperation of each sealing ring and valve port, all spaces with high-pressure hydraulic oil, i.e., the high-pressure chamber, are sealed. As a result, the piston cylinder 20 is stationary, and the elastic potential energy of the disc spring group 21 is effectively preserved. Thus, the energy storage process is completed.

[0063] Closing process: (such as Figure 1 , 2 (as shown) the solenoid valve c87 is energized to connect the oil hole k77 and the oil hole l78. At this time, the high-pressure chamber and the variable-pressure chamber are connected through the oil hole k77 and the oil hole l78. The high-pressure hydraulic oil in the sealed space between the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10, the right side of the main oil cylinder sealing ring 17 and the left side of the piston cylinder sealing ring b18, flows into the sealed space under the valve core sealing ring a62 in the long valve sleeve 57 from the oil hole e34, the oil hole k77, the oil hole l78, the oil hole j75, the oil hole y74, and the long valve sleeve oil hole c50 in turn. The valve core 61 is subjected to the upward combined force to cause the valve core 61 to move upward rapidly, the short valve sleeve valve port 121 is closed, and the long valve sleeve valve port 122 is opened. At this time, the high-pressure chamber and the variable-pressure chamber are connected by the long valve sleeve valve port 122, and the pressures in the two chambers are equal. At this time, the pressures on both sides of the piston rod sealing ring 31 on the piston rod 1 are equal. The piston rod 1 is subjected to a combined force to move to the left until it is in contact with the closing reduction sleeve 37 and stops.

[0064] During the movement of the piston rod 1, the high-pressure hydraulic oil in the sealed space between the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10, on the right side of the main oil cylinder sealing ring 17 and on the left side of the piston cylinder sealing ring b18 quickly flows from the oil hole d33, oil hole e34, oil hole g41, oil hole u95, long valve sleeve oil hole d111, valve body oil hole 119, long valve sleeve valve port l22, oil hole a22, side oil hole 45, oil hole c28, and oil hole b27 into the piston oil hole 35 of the main oil cylinder 10, the right side of the piston rod sealing ring 31, and the sealed space on the left side of the cylinder plug outer sealing ring 26. The high-pressure hydraulic oil in the piston oil hole 35 of the main cylinder 10, the left side of the piston rod seal 31, and the sealed space on the right side of the limit sleeve seal b43 and the limit sleeve seal a46 quickly flows into the piston oil hole 35 of the main cylinder 10, the right side of the piston rod seal 31, and the sealed space on the left side of the cylinder plug outer seal 26 from the limit sleeve side oil hole 40, oil hole g41, oil hole u95, long valve sleeve oil hole d111, valve body oil hole 119, long valve sleeve valve port l22, oil hole a22, side oil hole 45, oil hole c28, and oil hole b27.

[0065] After the electromagnetic valve C87 is powered off, the connection between the oil hole K77 and the oil hole L78 is blocked. At this point, the pressure-changing chamber and the high-pressure chamber are opened and connected through the long valve sleeve valve port 122, and the pressures of the two chambers are kept equal. The leftward movement of the piston rod 1 can drive the circuit breaker connecting rod to complete the closing action.

[0066] Opening process: (such as Figure 1 , 4 ) The solenoid valve a85 (solenoid valve b86) is energized to connect the oil hole n80 (oil hole m79) and the oil hole r84 (oil hole q83). At this time, the low-pressure chamber and the variable-pressure chamber are connected through the oil hole n80 (oil hole m79) and the oil hole r84 (oil hole q83). The high-pressure hydraulic oil in the sealed space under the valve core seal ring a62 in the long valve sleeve 57 is returned to the sealed space in the oil tank 5 from the long valve sleeve oil hole c50, oil hole y74, oil hole j75, oil hole n80 (oil hole m79), oil hole r84 (oil hole q83), and oil hole o81 (oil hole p82). At this time, the valve core 61 is subjected to the downward combined force to make the valve core 61 move downward rapidly, the short valve sleeve valve port 121 is opened, and the long valve sleeve valve port 122 is closed. At this time, the low-pressure chamber and the variable-pressure chamber are connected by the short valve sleeve valve port 121, and the pressure in the two chambers is equal. At this time, the pressure on the left side of the piston rod sealing ring 31 on the piston rod 1 is greater than that on the right side. The piston rod 1 is subjected to a combined force to move to the right until it is in contact with the brake-opening reduction sleeve 30 and stops.

[0067] During the movement of the piston rod 1, the high-pressure hydraulic oil in the sealed space between the inner surface of the piston cylinder 20 and the outer surface of the main oil cylinder 10, on the right side of the main oil cylinder seal ring 17 and on the left side of the piston cylinder seal ring b18, quickly flows into the piston oil hole 35 of the main oil cylinder 10, the left side of the piston rod seal ring 31, and the sealed space on the right side of the limit sleeve seal ring b43 and the limit sleeve seal ring a46 from the oil hole d33, the oil hole e34, the oil hole g41, the side oil hole 40 of the limit sleeve, and the piston oil hole 35. The hydraulic oil in the piston oil hole 35 of the main oil cylinder 10, on the right side of the piston rod seal ring 31, and on the left side of the oil cylinder plug outer seal ring 26 flows back to the sealed space in the oil tank 5 from the oil hole b27, the oil hole c28, the side oil hole 45, the oil hole a22, the valve body oil hole 119, the short valve sleeve valve port 121, the short valve sleeve oil hole 116, the oil hole t93, and the oil hole s92.

[0068] After the solenoid valve A85 (solenoid valve B86) is powered off, it blocks the connection between the oil hole N80 (oil hole M79) and the oil hole R84 (oil hole Q83). At this point, the transformer chamber and the low-pressure chamber are connected through the short valve sleeve valve port 121, and the pressures of the two chambers remain equal. The rightward movement of the piston rod 1 can drive the circuit breaker connecting rod to complete the opening action.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An integrated hydraulic spring operating mechanism for a high voltage circuit breaker, characterized in that: It comprises a main oil cylinder (10), an oil tank (5), a piston cylinder (20), a piston rod (1), and a disc spring group (21); the oil tank (5) is fixed to one end of the main oil cylinder (10) and the two are connected, and the other end of the main oil cylinder (10) is sealed; the piston cylinder (20) is installed on the outside of the main oil cylinder (10) and can reciprocate along the main oil cylinder (10); the piston rod (1) passes through the oil tank (5) and enters the piston oil hole (35) at the axis of the main oil cylinder (10) and can reciprocate along the piston oil hole (35); the disc spring group (21) is arranged on the piston cylinder (20); A control valve is provided in the main oil cylinder (10), and the control valve is arranged in the valve body oil hole (119). The control valve comprises a long valve sleeve (57), a short valve sleeve (63) and a valve core (61). The long valve sleeve (57), the short valve sleeve (63) and the valve core (61) are coaxially arranged with the valve body oil hole (119); the valve core (61) is inserted into the axial center holes of the long valve sleeve (57) and the short valve sleeve (63); the long valve sleeve (57) and the short valve sleeve (63) are respectively located in the valve body oil hole (119). The upper and lower sides of the valve body oil hole (119) are provided with locking covers (9) at both ends, the locking covers (9) are threadedly fixed to the main oil cylinder (10), and the locking covers (9) are used to seal the long valve sleeve (57) and the short valve sleeve (63) in the valve body oil hole (119); the valve core (61) can move up and down along the valve body oil hole (119); the long valve sleeve (57), the short valve sleeve (63) and the valve core (61) are respectively provided with oil holes for communicating with the valve body oil hole (119); The left side of the oil tank (5) is sealed by an oil tank cover (2), and the oil tank cover (2) is provided with a through hole for the piston rod (1) to pass through; the oil tank (5) is provided with an oil inlet nozzle (4) and an oil outlet nozzle (401); the bottom of the oil tank (5) is provided with a motor (106), and the oil tank (5) is provided with a crankshaft assembly, and the crankshaft assembly is respectively connected to two oil pumps (49) and the motor (106); the two oil pumps (49) are respectively connected to the main oil cylinder (10) through the oil hole u (95) and the oil hole e (34).

2. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The piston oil hole (35) is located on one side where the piston rod (1) is installed, and is provided with a threaded sleeve (47), a limit sleeve (42) and a closing reduction sleeve (37) in sequence; the other side of the piston oil hole (35) is provided with an opening reduction sleeve (30); the space between the closing reduction sleeve (37) and the opening reduction sleeve (30) forms a reciprocating motion space for the piston rod (1).

3. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The short valve sleeve (63) is provided with a short valve sleeve outer sealing ring (65) and a short valve sleeve inner sealing ring (66) on its outer circle, the long valve sleeve (57) is provided with a long valve sleeve inner sealing ring (67), a long valve sleeve middle sealing ring (69) and a long valve sleeve outer sealing ring (70) on its outer diameter, and the valve core (61) is provided with a valve core sealing ring a (62) and a valve core sealing ring b (64) on its outer diameter.

4. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The crankshaft assembly comprises a crankshaft (48), wherein the crankshaft (48) is inserted into a crankshaft sleeve (51) and extends to the outside of the oil tank, and is connected to a large gear (104) arranged outside the oil tank (5), and the large gear (104) is meshedly connected with a small gear (105) arranged on the motor; the oil pump is arranged above the crankshaft (48).

5. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 4, characterized in that: A shaft seal (99), a crankshaft sleeve sealing ring (101) and a pressure cover (103) are provided at one end of the crankshaft sleeve (51); the shaft seal (99) and the crankshaft sleeve sealing ring (101) are used to seal the crankshaft (48); the pressure cover (103) is fixed to the oil tank (5) by screws; and the pressure cover is used to limit the crankshaft (48).

6. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 5, characterized in that: A pressure relief assembly is also provided in the oil tank, and the pressure relief assembly comprises a crank arm shaft (96), one end of which is fixed on a flanged bearing (102); an inner crank arm (94) and an outer crank arm (98) are provided on the crank arm shaft (96), the inner crank arm (94) is placed in the oil tank (5), the outer crank arm (98) is located outside the oil tank (5), and the inner crank arm (94) and the outer crank arm (98) rotate synchronously.

7. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 6, characterized in that: The pressure relief assembly also includes a safety valve assembly, which includes an upper safety valve seat (109), a lower safety valve seat (114) and a safety valve stem (108). The upper safety valve seat (109) and the lower safety valve seat (114) are arranged in a safety valve oil hole (124), and the safety valve oil hole (124) is communicated with the valve body oil hole (119); the upper safety valve seat (109) is threadedly fixed to the main oil cylinder (10) and is sealed by an upper valve seat sealing ring (110); a spring (107) is also sleeved on the outer side of the upper safety valve seat (109), and the spring (107) ) at two ends respectively press against the inner crank arm (94) and the end surface of the main oil cylinder (10); the safety valve stem (108) is inserted into the central through hole of the upper safety valve seat (109), the steel ball (112) and the lower valve seat spring (113) are placed in the inner hole of the lower safety valve seat (114), and the steel ball (112) presses against the central small hole of the upper safety valve seat (109) for sealing under the action of the lower valve seat spring (113); when the outer crank arm (98) drives the inner crank arm (94) to rotate, the safety valve stem (108) pushes the steel ball (112) to break the seal.

8. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: The main oil cylinder (10) is provided with a closing speed regulating valve and an opening speed regulating valve. The closing speed regulating valve comprises a speed regulating valve rod a (72). The speed regulating valve rod a (72) is inserted into an oil hole z (120). The oil hole z (120) is communicated with the oil hole u (95). The speed regulating valve rod a (72) is threadedly connected to a fixing seat a (71). The fixing seat a (71) is fixed to the main oil cylinder (10) by screws. When the speed regulating valve rod a (72) is rotated, the right end of the speed regulating valve rod a (72) will penetrate into or withdraw from the oil hole z (120) and can throttle the oil hole u (95), thereby playing the role of a closing speed regulating valve. The gate-opening speed regulating valve comprises a speed regulating valve stem b (88), wherein the speed regulating valve stem b (88) is inserted into an oil hole t (93), wherein the oil hole t (93) is communicated with an oil hole (116) of a short valve sleeve, and the oil hole t (93) is also communicated with the oil tank (5) through an oil hole s (92); the speed regulating valve stem b (88) is threadedly connected to a fixing seat b (89), and the fixing seat b (89) is fixed to the main oil cylinder (10) by screws. When the speed regulating valve stem b (88) is rotated, the left end of the speed regulating valve stem b (88) will penetrate into or withdraw from the oil hole t (93), and can throttle the oil hole s (92), thereby playing the role of a gate-opening speed regulating valve.

9. The integrated hydraulic spring operating mechanism for a high-voltage circuit breaker according to claim 1, characterized in that: A limiting flange (36) and a stabilizing flange (24) are respectively provided at both ends of the disc spring group, the limiting flange (36) is fixed on the piston cylinder (20), the stabilizing flange (24) is connected to the tail fixing flange (23), and the tail fixing flange (23) is fixed on the main oil cylinder.

10. The integrated hydraulic spring operating mechanism for a high voltage circuit breaker according to claim 9, characterized in that: The piston cylinder (20) is also provided with a piston cylinder flange (11), and the piston cylinder flange (11) is limited by a fixing ring (12) and a limiting flange (36) respectively arranged on both sides thereof, and the fixing ring (12) is fixed on the left side of the piston cylinder (20).

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