Spring hydraulic operating mechanism

Abstract

The invention relates to the field of high-voltage power transmission and transformation, and discloses a spring hydraulic operating mechanism which comprises a spring mechanical lock system and a hydraulic system, the spring mechanical lock system comprises a cylinder body, a valve body, a cover plate and a support, and the cylinder body, the valve body, the cover plate and the support are sequentially installed in series from right to left and fixed through bolts; a plurality of coaxial bosses are arranged on the outer wall of the cylinder body, and a rotating flange, a sliding flange, a fixed flange, a flange and an oil cylinder are sequentially sleeved on the bosses of the cylinder body from left to right. The spring mechanical lock system has the following advantages and effects that after the mechanical lock system is locked, the elastic potential energy of the spring is not converted into hydraulic energy and is directly mechanically locked by the mechanical lock, and the hydraulic system does not generate high-pressure hydraulic energy, so that the leakage probability of hydraulic oil is greatly reduced, and the probability of frequent pressure relief and energy storage is effectively reduced; the reliability of the high-voltage circuit breaker can be improved, and stable operation of a power grid is ensured.

Description

Technical Field

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

[0002] A circuit breaker is a switching device that can close, carry and disconnect the current under normal circuit conditions and can close, carry and disconnect the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. Its function is equivalent to the combination of fuse switches and over-underheating relays, and generally no parts need to be changed after breaking the fault current. High-voltage circuit breakers are important equipment in the field of high-voltage power transmission and transformation. High-voltage operating mechanisms are important components of circuit breakers. The closing and opening operations of high-voltage circuit breakers are realized through operating mechanisms.

[0003] In the related art, the high-voltage operating mechanism in the high-voltage circuit breaker usually adopts a spring operating mechanism or a hydraulic operating mechanism. The spring operating mechanism currently used in the high-voltage circuit breaker generally has the problems of low output power, poor stability of mechanical characteristics and unreliable action; the hydraulic operating mechanism generally has the problems of high hydraulic system pressure, easy oil leakage and frequent pressure relief during long-term use, thereby reducing the reliability of the high-voltage circuit breaker.

[0004] Therefore, we propose an ideal spring hydraulic operating mechanism to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a spring hydraulic operating mechanism, which eliminates the hidden dangers of hydraulic oil leakage, frequent pressure relief and energy storage, realizes the perfect combination of spring mechanism and hydraulic mechanism, can improve the reliability of high-voltage circuit breaker, and ensure the stable operation of power grid.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a spring hydraulic operating mechanism, including a spring mechanical lock system and a hydraulic system, the spring mechanical lock system including a cylinder body, a valve body, a cover plate and a bracket, the cylinder body, the valve body, the cover plate and the bracket are sequentially installed in series from right to left and fixed by bolts, a plurality of coaxial bosses are arranged on the outer wall of the cylinder body, a rotating flange, a sliding flange, a fixed flange, a flange and an oil cylinder are sequentially sleeved on the plurality of bosses of the cylinder body from left to right, a base is threadedly installed on the right end of the cylinder body, the oil cylinder is located in the middle part of the cylinder body, a guide ring and a guide ring are arranged on the inner hole of the oil cylinder, a sealing ring I located on one side of the guide ring is arranged in the inner hole of the oil cylinder, the flange is sleeved on the oil cylinder, a disc spring group is sleeved on the outside of the oil cylinder and the cylinder body, and the disc spring group is located between the base and the flange; The rotating flange is provided with three rollers along the axial direction, and the three rollers are all fixed on the rotating flange through roller pins, and the sliding flange is evenly provided with three springs, and one end of the three springs is fixedly installed with a guide head, and the three guide heads are all in contact with the rotating flange, and the sliding flange is evenly provided with three roller protrusions, and the three rollers respectively form a roller slider structure with the corresponding roller protrusions, and the sliding flange is evenly provided with six release claws, and the inner side walls of the six release claws are provided with protrusions; Six small crank arms are rotatably mounted on the outer circular wall of the fixed flange through a pin shaft, and the six small crank arms are evenly arranged in a ring shape. Six large crank arms are rotatably mounted on the outer wall of the oil cylinder through a pin shaft, and the six large crank arms are evenly arranged in a ring shape. One end of the six small crank arms is rotatably connected to the middle part of the corresponding large crank arm through a pin shaft, and one end of the six large crank arms is fixed with a locking roller through a pin shaft, and a crank arm protrusion is provided at one end of the small crank arm fixed on the oil cylinder; A tension spring is fixedly installed on the rotating flange, a positioning shaft is fixedly installed on the valve body, one end of the tension spring is fixedly connected to the positioning shaft, and small rollers are arranged on the rotating flange.

[0007] The present invention is further configured as follows: a piston rod is arranged in the cylinder body, a sealing ring F is mounted on the piston rod, a positioning sleeve, a sealing sleeve and a flange A are mounted on the piston rod, the positioning sleeve is threadedly connected and fixed to the cylinder body, a sealing ring M and a sealing ring K are arranged on the inner ring wall of the sealing sleeve, a sealing ring J and a sealing ring L are arranged on the outer ring wall of the sealing sleeve, a flange B and a cylinder base are arranged at the right end inside the cylinder body, a sealing ring D and a sealing ring E are arranged on the cylinder base, and the cylinder base is threadedly connected and fixed to the cylinder body.

[0008] The present invention is further configured as follows: an oil pump is fixedly mounted on the end surface of the cylinder body, an oil hole c and a cylinder high pressure chamber are provided on the cylinder body, and the oil hole c communicates the oil pump with the cylinder high pressure chamber.

[0009] The present invention is further configured as follows: the valve body is located on the left side of the cylinder body, a sealing ring C is arranged between the valve body and the cylinder body, a crankshaft is rotatably installed on the left side of the valve body, a motor is fixedly installed on the valve body, a small gear is fixedly installed on the output shaft end of the motor, a large gear is fixedly installed on the crankshaft, the small gear is meshed with the large gear, a small valve sleeve and a large valve sleeve are installed in the valve body, the same valve core is installed in the small valve sleeve and the large valve sleeve, sealing rings R, S and T are arranged on the outer circular wall of the large valve sleeve, and a sealing ring Q is arranged on the outer circular wall of the small valve sleeve.

[0010] The present invention is further configured as follows: a sleeve A, a valve sleeve A and a valve seat A are installed in the large valve sleeve, and the sleeve A, the valve sleeve A and the valve seat A are fitted in sequence, a connecting rod A is installed in the sleeve A, a valve stem A is installed in the valve sleeve A, a steel ball A and a spring A are installed in the valve seat A, a sealing ring U and a sealing ring W are arranged on the outer circular wall of the valve sleeve A, a sealing ring V is arranged on the inner circular wall of the valve sleeve A, and the valve stem A slides through the sealing ring V, and a sleeve B, a valve sleeve B and a valve seat B are also installed in the large valve sleeve, and the sleeve B, the valve sleeve B and the valve seat B are fitted in sequence, a connecting rod B is installed in the sleeve B, a valve stem B is installed in the valve sleeve B, a steel ball B and a spring B are installed in the valve seat B, a sealing ring α, a sealing ring Y and a sealing ring X are arranged on the outer circular wall of the valve sleeve B, a sealing ring Z is arranged on the inner circular wall of the valve sleeve B, and the valve stem B slides through the sealing ring Z.

[0011] The present invention is further configured as follows: the large valve sleeve is fixedly mounted with an electromagnet flange located in the valve body, a latch half-shaft is mounted in the electromagnet flange, a lever A and a lever B located in the electromagnet flange are mounted on the latch half-shaft, an electromagnet A and an electromagnet B are fixedly mounted on the electromagnet flange, a small latch shaft is fixedly mounted on the valve body, a small latch and a torsion spring a are fixedly mounted on the small latch shaft, a hook-shaped latch hook is arranged at one end of the small latch, and the latch hook is adapted to the latch half-shaft.

[0012] The present invention is further configured as follows: the bracket is located on the left side of the valve body, and the left end of the piston rod is threadedly connected with a joint and a locking nut.

[0013] The present invention is further configured as follows: the valve body is provided with an oil hole d and an oil hole e, the cylinder body is provided with an oil hole a and an oil hole b, the oil hole d and the oil hole a are connected and sealed by a sealing sleeve, the oil hole e and the oil hole b are connected and sealed by a sealing sleeve, and a sealing ring N is provided on the sealing sleeve.

[0014] The present invention is further configured as follows: the hydraulic system includes a high-pressure chamber, an operating chamber and a low-pressure chamber; the high-pressure chamber is composed of a cylinder high-pressure chamber, a piston high-pressure chamber, a valve core high-pressure chamber, a pilot high-pressure chamber, oil holes b, oil holes c, oil holes k, oil holes m, oil holes e, oil holes n and oil holes t; a sealing ring G and a sealing ring H are arranged between the cylinder body and the oil cylinder; the cylinder high-pressure chamber is a space surrounded by the cylinder body, the oil cylinder, the sealing ring G and the sealing ring H; a sealing ring F, a sealing ring J, a sealing ring K, a sealing ring L and a sealing ring M are arranged in the cylinder body The piston high-pressure chamber is the space surrounded by the piston rod in the inner hole of the cylinder body and the sealing sleeve, flange A, sealing ring F, sealing ring J, sealing ring K, sealing ring L and sealing ring M. The cylinder body is provided with sealing rings R, S, P and the closing valve port. The valve core high-pressure chamber is the space surrounded by the inner hole of the small valve sleeve and the outer circle of the valve core, sealing rings R, S, P and the closing valve port. The cylinder body is provided with sealing rings X and steel ball B. The pilot high-pressure chamber is the space surrounded by the large valve sleeve and valve sleeve B, sealing ring X and steel ball B.

[0015] The present invention is further configured as follows: the operating chamber is composed of a piston operating chamber, a valve core operating chamber, a pilot operating chamber, an oil hole d, an oil hole z, an oil hole a, an oil hole g, an oil hole h, an oil hole i, an oil hole o, an oil hole p, an oil hole q, an oil hole s, and an oil hole w; a sealing ring F, a sealing ring D, and a sealing ring E are mounted on the piston rod; the piston operating chamber is a space surrounded by a flange B in the cylinder body, a cylinder body base, a sealing ring F, a sealing ring D, and a sealing ring E; a sealing ring O and a gate valve port are mounted on the valve core; the valve core operating chamber is a space surrounded by the valve core in the large valve sleeve, the sealing ring O, and the gate valve port; the sealing ring O is used to divide the valve core operating chamber into two parts and pass through the oil hole The pilot operating chamber is the space enclosed by the sealing ring Y and the sealing ring X of the valve sleeve B in the large valve sleeve and the valve seat A, and is sealed by the sealing ring X, the sealing ring Y, the sealing ring W, the steel ball A and the steel ball B respectively. The low-pressure chamber is composed of the valve body oil storage chamber, the pilot low-pressure chamber, the oil hole u, the oil hole v, the oil hole y, the oil hole x and the oil hole r. The valve body oil storage chamber is the internal cavity of the valve body, which is placed between the cover plate and the cylinder body for storing hydraulic oil and is sealed by the sealing ring A, the sealing ring B and the sealing ring C. The pilot low-pressure chamber is the cavity between the sealing ring Y and the sealing ring α on the large valve sleeve and the inner valve sleeve B and between the sealing ring W and the sealing ring U on the valve sleeve A.

[0016] The present invention includes at least one of the following beneficial technical effects: The present invention utilizes a spring hydraulic operating mechanism composed of a spring mechanical lock system and a hydraulic system. The function of the spring mechanical lock system is that after the mechanical lock system is locked, the elastic potential energy of the spring is not converted into hydraulic energy, but is directly locked by the mechanical lock. The hydraulic system does not generate high-pressure hydraulic energy, thereby greatly reducing the probability of hydraulic oil leakage, effectively reducing the probability of frequent pressure relief and energy storage, and can improve the reliability of the high-voltage circuit breaker to ensure the stable operation of the power grid.

[0017] The present invention utilizes a spring hydraulic operating mechanism composed of a spring mechanical lock system and a hydraulic system to achieve a combination of the advantages of the spring operating mechanism and the hydraulic operating mechanism. That is, during steady-state operation, the mechanism is in a zero-pressure state and does not require energy storage to supplement pressure. During operation, it acts according to the principle of the hydraulic mechanism, thereby achieving a combination of the advantages of the two mechanisms, abandoning the respective shortcomings of the two mechanisms, and meeting the highest comprehensive requirements of modern power grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1It is a top view schematic diagram of the cylinder body of the spring hydraulic operating mechanism of the present invention; Figure 2 It is a schematic top view of the valve body of the spring hydraulic operating mechanism of the present invention; Figure 3 It is a schematic diagram of the spring hydraulic operating mechanism BB of the present invention; Figure 4 It is a schematic diagram of the spring hydraulic operating mechanism CC of the present invention; Figure 5 It is a schematic diagram of the spring hydraulic operating mechanism AA of the present invention; Figure 6 It is a schematic diagram of the spring hydraulic operating mechanism AA of the present invention; Figure 7 It is a D-direction schematic diagram of the spring hydraulic operating mechanism of the present invention; Figure 8 It is a partial three-dimensional schematic diagram of the spring hydraulic operating mechanism of the present invention.

[0020] In the figure; 1, cylinder body; 2, sealing sleeve; 3, oil hole a; 4, positioning sleeve; 5, oil hole b; 6, oil pump; 7, oil hole c; 8, disc spring assembly; 9, sliding flange; 10, locking roller; 11, release claw; 12, large crank arm; 13, valve body; 14, motor; 15, small gear; 16, large gear; 17, crankshaft; 18, oil hole d; 19, bump; 20, oil hole e; 21, cover plate; 22, small latch; 23, small latch shaft; 24, torsion spring a; 25, latch hook; 26, latch half shaft; 27, large valve sleeve; 28, electromagnet flange; 29, electromagnet A; 30, connecting rod A; 31, sleeve A; 32, connecting rod B; 33, sleeve B; 34, valve sleeve A; 35, valve sleeve B; 36, valve seat A; 37, steel ball A; 38, spring A; 39, valve seat B; 40, spring B; 41, steel ball B; 42, lever A; 43, lever B; 44, valve core; 45, small valve sleeve; 46, valve stem B; 47, valve stem A; 48, joint; 49, locking nut; 50, piston rod; 51, sealing ring A; 52, sealing ring B; 53, sealing ring C; 54, rotating flange; 55, roller; 56, roller pin; 57, small crank arm; 58, flange; 59, oil cylinder; 60, base; 61, sealing sleeve; 62, flange A; 63, flange B; 64, cylinder base; 65, fixed flange; 66, sealing ring D; 67, sealing ring E; 68, sealing ring F; 69, guide ring; 70, sealing ring G; 71, sealing ring H; 72, guide ring; 73, sealing ring I; 74, sealing ring J; 75, sealing ring K; 76, sealing ring L; 77, sealing ring M; 78, bracket; 79, sealing ring N; 80, sealing ring O; 81, sealing ring P; 82, sealing ring Q; 83, sealing ring R; 84, sealing ring S; 85, sealing ring T; 86, gate valve port; 87, gate valve port; 88, valve body oil storage chamber; 89, oil hole z; 90, small roller; 91, cylinder body high pressure chamber; 92, oil hole g; 93, oil hole h; 94, oil hole i; 95, piston high pressure chamber; 96, electromagnet B; 97, piston operating chamber; 98, oil hole k; 99, crank arm protrusion; 100, oil hole m; 101, oil Hole n; 102, oil hole o; 103, oil hole p; 104, oil hole q; 105, oil hole r; 106, valve core high pressure chamber; 107, valve core operating chamber; 108, oil hole s; 109, oil hole t; 110, oil hole u; 111, oil hole v; 112, oil hole w; 113, oil hole x; 114, oil hole y; 115, sealing ring U; 116, sealing ring V; 117, sealing ring W; 118, sealing ring X; 119, sealing ring Y; 120, sealing ring Z; 121, sealing ring α; 122, pilot high pressure chamber; 123, pilot operating chamber; 124, pilot low pressure chamber; 125, guide head; 126, spring; 127, roller bump; 128, positioning shaft; 129, tension spring. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 8 The present invention provides a spring hydraulic operating mechanism, including a spring mechanical lock system and a hydraulic system. The spring mechanical lock system includes a cylinder body 1, a valve body 13, a cover plate 21 and a bracket 78. The cylinder body 1, the valve body 13, the cover plate 21 and the bracket 78 are sequentially installed in series from right to left and fixed by bolts. A plurality of coaxial bosses are arranged on the outer wall of the cylinder body 1. A rotating flange 54, a sliding flange 9, a fixed flange 65, a flange 58 and an oil cylinder 59 are sequentially installed on the plurality of bosses of the cylinder body 1 from left to right. The rotating flange 54 can only rotate around the central axis of the cylinder body 1 (in the A+A- direction), and the sliding flange 9 can only rotate along the cylinder body 1. The oil cylinder 59 is located in the middle of the cylinder body 1. A guide ring 72 and a guide ring 69 are arranged on the inner hole of the oil cylinder 59. By using the guide ring 72 and the guide ring 69, the oil cylinder 59 can slide axially outside the cylinder body 1 (in the X+X- direction). A sealing ring I73 located on one side of the guide ring 69 is arranged in the inner hole of the oil cylinder 59. The flange 58 is mounted on the oil cylinder 59. The outer part of the oil cylinder 59 and the cylinder body 1 is mounted with a disc spring group 8. The disc spring group 8 is located between the base 60 and the flange 58. The disc spring group 8 is limited by the base 60 and the flange 58. Three rollers 55 are arranged axially on the rotating flange 54, and the three rollers 55 are fixed on the rotating flange 54 through roller pins 56. Three springs 126 are evenly arranged on the sliding flange 9, and one end of the three springs 126 is fixedly installed with a guide head 125. The three guide heads 125 are all in contact with the rotating flange 54. The elastic force of the springs 126 can make the guide heads 125 always press against the rotating flange 54. Three roller bumps 126 are evenly arranged on the sliding flange 9. 7. The three rollers 55 and the corresponding roller protrusions 127 respectively form a roller slider structure. Six trip claws 11 are evenly arranged on the sliding flange 9. The inner side walls of the six trip claws 11 are all provided with protrusions 19. Under the action of the spring 126 of the guide head 125, the sliding flange 9 is subjected to a thrust in the X-direction, so that the protrusions 19 on the sliding flange 9 fit with the crank arm protrusions 99 on the small crank arm 57 or the trip claws 11 on the sliding flange 9 fit with the locking rollers 10 evenly arranged on the large crank arm 12; Six small crank arms 57 are rotatably mounted on the outer wall of the fixed flange 65 through a pin shaft, and the six small crank arms 57 are evenly arranged in a ring shape. Six large crank arms 12 are rotatably mounted on the outer wall of the oil cylinder 59 through a pin shaft, and the six large crank arms 12 are evenly arranged in a ring shape. One end of the six small crank arms 57 is rotatably connected to the middle part of the corresponding large crank arms 12 through a pin shaft, and one end of the six large crank arms 12 is fixed with a locking roller 10 through a pin shaft. One end of the small crank arm 57 fixed to the oil cylinder 59 is provided with a crank arm protrusion 99; A tension spring 129 is fixedly installed on the rotating flange 54, a positioning shaft 128 is fixedly installed on the valve body 13, one end of the tension spring 129 is fixedly connected to the positioning shaft 128, a small roller 90 is arranged on the rotating flange 54, and the tension spring 129 applies a reset tension to the rotating flange 54 along the A+ direction.

[0023] In this embodiment, a piston rod 50 is arranged in the cylinder body 1, and a sealing ring F68 is mounted on the piston rod 50. A positioning sleeve 4, a sealing sleeve 61 and a flange A62 are mounted on the piston rod 50. The piston rod 50 can slide axially in the inner hole of the cylinder body 1 (X+X- direction), and is limited by flange A62 and flange B63. The positioning sleeve 4 is threadedly connected and fixed to the cylinder body 1. A sealing ring M77 and a sealing ring K75 are arranged on the inner ring wall of the sealing sleeve 61, and a sealing ring J74 and a sealing ring L76 are arranged on the outer ring wall of the sealing sleeve 61. A flange B63 and a cylinder base 64 are arranged at the right end inside the cylinder body 1. A sealing ring D66 and a sealing ring E67 are arranged on the cylinder base 64, and the cylinder base 64 is threadedly connected and fixed to the cylinder body 1.

[0024] An oil pump 6 is fixedly mounted on the end surface of the cylinder body 1 . An oil hole c7 and a cylinder high-pressure chamber 91 are provided on the cylinder body 1 . The oil hole c7 communicates the oil pump 6 with the cylinder high-pressure chamber 91 .

[0025] In this embodiment, the valve body 13 is located on the left side of the cylinder body 1, and a sealing ring C53 is arranged between the valve body 13 and the cylinder body 1. A crankshaft 17 is rotatably installed on the left side of the valve body 13. A motor 14 is fixedly installed on the valve body 13. A small gear 15 is fixedly installed on the output shaft end of the motor 14. A large gear 16 is fixedly installed on the crankshaft 17. The small gear 15 is meshed with the large gear 16. The rotation of the motor 14 can drive the crankshaft 17 to rotate through gear transmission. A small valve sleeve 45 and a large valve sleeve 27 are installed in the valve body 13. The same valve core 44 is installed in the small valve sleeve 45 and the large valve sleeve 27. Sealing rings R83, S84 and T85 are arranged on the outer circumferential wall of the large valve sleeve 27, and a sealing ring Q82 is arranged on the outer circumferential wall of the small valve sleeve 45.

[0026] In this embodiment, a sleeve A31, a valve sleeve A34 and a valve seat A36 are installed in the large valve sleeve 27. The sleeve A31, the valve sleeve A34 and the valve seat A36 are fitted in sequence. A connecting rod A30 is installed in the sleeve A31, a valve stem A47 is installed in the valve sleeve A34, a steel ball A37 and a spring A38 are installed in the valve seat A36, a sealing ring U115 and a sealing ring W117 are arranged on the outer circumferential wall of the valve sleeve A34, a sealing ring V116 is arranged on the inner circumferential wall of the valve sleeve A34, and the valve stem A47 slides through the sealing ring V116. A sleeve B33, a valve sleeve B35 and a valve seat B39 are also installed in the valve sleeve 27. The sleeve B33, the valve sleeve B35 and the valve seat B39 are fitted in sequence. A connecting rod B32 is installed in the sleeve B33, a valve stem B46 is installed in the valve sleeve B35, a steel ball B41 and a spring B40 are installed in the valve seat B39, a sealing ring α121, a sealing ring Y119 and a sealing ring X118 are arranged on the outer circular wall of the valve sleeve B35, a sealing ring Z120 is arranged on the inner circular wall of the valve sleeve B35, and the valve stem B46 slides through the sealing ring Z120.

[0027] In this embodiment, the large valve sleeve 27 is fixedly mounted with an electromagnet flange 28 located in the valve body 13, a latch half shaft 26 is mounted in the electromagnet flange 28, a lever A42 and a lever B43 located in the electromagnet flange 28 are mounted on the latch half shaft 26, an electromagnet A29 and an electromagnet B96 are fixedly mounted on the electromagnet flange 28, a small latch shaft 23 is fixedly mounted on the valve body 13, a small latch 22 and a torsion spring a24 are fixedly mounted on the small latch shaft 23, a latch hook 25 in the shape of a hook is arranged at one end of the small latch 22, and the latch hook 25 is fixedly mounted with the torsion spring a24. The latch half shaft 26 is adapted, and the small latch 22 can rotate with the small latch shaft 23 as the axis, and be reset by the torsion spring a24. The latch hook 25 on the small latch 22 can resist the half shaft of the latch half shaft 26 and self-lock. The rotation of the latch half shaft 26 can unlock the latch hook 25 to rotate the small latch 22. When the rotating flange 54 rotates to a certain stroke along the A-direction, the small roller 90 fits the small latch 22, causing the small latch 22 to rotate counterclockwise. The latch hook 25 on the small latch 22 resists the half shaft of the latch half shaft 26 and self-locks. The rotation of the rotating flange 54 can be locked.

[0028] In this embodiment, the bracket 78 is located on the left side of the valve body 13, and the left end of the piston rod 50 is threadedly connected with a connector 48 and a locking nut 49, and the connector 48 is used to connect the switch device matched with the present invention.

[0029] In this embodiment, the valve body 13 is provided with an oil hole d18 and an oil hole e20, and the cylinder body 1 is provided with an oil hole a3 and an oil hole b5. The oil hole d18 and the oil hole a3 are connected and sealed by a sealing sleeve 2, and the oil hole e20 and the oil hole b5 are connected and sealed by a sealing sleeve 2, and a sealing ring N79 is provided on the sealing sleeve 2.

[0030] In this embodiment, the hydraulic system includes a high-pressure chamber, an operating chamber and a low-pressure chamber. The high-pressure chamber is connected to the operating chamber by opening the closing valve port 87 and closing the opening valve port 86. The operating chamber is connected to the low-pressure chamber by closing the closing valve port 87 and opening the opening valve port 86. Figure 5 ) The high pressure chamber is connected to the operating chamber, and the piston rod 50 is in the closing position in the X+ direction; (e.g. Figure 6 )The operating chamber is connected to the low-pressure chamber, and the piston rod 50 is in the X-direction open position; the valve core 44 and the small valve sleeve 45 are fitted to limit the open valve port 86 to close and the closing valve port 87 to open, and the valve core 44 and the large valve sleeve 27 are fitted to limit the open valve port 86 to open and the closing valve port 87 to close, wherein: The high-pressure chamber is composed of a cylinder high-pressure chamber 91, a piston high-pressure chamber 95, a valve core high-pressure chamber 106, a pilot high-pressure chamber 122, oil holes b5, oil holes c7, oil holes k98, oil holes m100, oil holes e20, oil holes n101 and oil holes t109. A sealing ring G70 and a sealing ring H71 are arranged between the cylinder body 1 and the oil cylinder 59. The cylinder high-pressure chamber 91 is a space surrounded by the cylinder body 1, the oil cylinder 59, the sealing ring G70 and the sealing ring H71. The cylinder body 1 is provided with sealing rings F68, J74, K75, L76 and M77. The piston high-pressure chamber 95 is a space surrounded by the piston rod 50 in the inner hole of the cylinder body 1. The space surrounded by the sealing sleeve 61, flange A62, sealing ring F68, sealing ring J74, sealing ring K75, sealing ring L76 and sealing ring M77, the cylinder body 1 is provided with sealing ring R83, sealing ring S84, sealing ring P81 and closing valve port 87, the valve core high-pressure chamber 106 is the space surrounded by the inner hole of the small valve sleeve 45 and the outer circle of the valve core 44, sealing ring R83, sealing ring S84, sealing ring P81 and closing valve port 87, the cylinder body 1 is provided with sealing ring X118 and steel ball B41, the pilot high-pressure chamber 122 is the space surrounded by the large valve sleeve 27 and the valve sleeve B35, sealing ring X118 and steel ball B41.

[0031] In this embodiment, the operating chamber is composed of a piston operating chamber 97, a valve core operating chamber 107, a pilot operating chamber 123, an oil hole d18, an oil hole z89, an oil hole a3, an oil hole g92, an oil hole h93, an oil hole i94, an oil hole o102, an oil hole p103, an oil hole q104, an oil hole s108, and an oil hole w112. The piston rod 50 is provided with a sealing ring F68, a sealing ring D66, and a sealing ring E67. The piston operating chamber 97 It is the space enclosed by flange B63, cylinder base 64, sealing ring F68, sealing ring D66 and sealing ring E67 in cylinder body 1. Sealing ring O80 and gate valve port 86 are installed on valve core 44. Valve core operating chamber 107 is the space enclosed by valve core 44, sealing ring O80 and gate valve port 86 in large valve sleeve 27. Sealing ring O80 is used to divide valve core operating chamber 107 into two parts and pass through oil hole p103 and oil hole q1 04 is connected, the pilot operating chamber 123 is the space enclosed by the sealing ring Y119 and the sealing ring X118 of the valve sleeve B35 in the large valve sleeve 27 and the valve seat A36, which is sealed by the sealing ring X118, the sealing ring Y119, the sealing ring W117, the steel ball A37 and the steel ball B41 respectively. The low-pressure chamber is composed of the valve body oil storage chamber 88, the pilot low-pressure chamber 124, the oil hole u110, the oil hole v111, the oil hole y114, the oil hole x1 13, oil hole r105, the valve body oil storage chamber 88 is the internal cavity of the valve body 13, placed between the cover plate 21 and the cylinder body 1 for storing hydraulic oil, and sealed by sealing ring A51, sealing ring B52 and sealing ring C53, the pilot low-pressure chamber 124 is the large valve sleeve 27, the part between the sealing ring Y119 and the sealing ring α121 on the inner valve sleeve B35 and the cavity between the sealing ring W117 and the sealing ring U115 on the valve sleeve A34.

[0032] In this embodiment, when the sliding flange 9 moves along the X+ direction, the roller slider composed of the roller protrusion 127 and the roller 55 cooperates, and the rotating flange 54 rotates along the A- direction. When it rotates to a certain angle, the small roller 90 on the rotating flange 54 is stuck by the small latch 22, and the latch hook 25 on the small latch 22 is locked by the latch half shaft 26, thereby locking the rotating flange 54 and the sliding flange 9. The sliding flange 9 moves and resets along the X- direction under the action of the spring 126 of the guide head 125 until it is limited by the fixed flange 65, and the rotating flange 54 rotates and resets along the A+ direction under the action of the tension spring 129.

[0033] like Figure 6 When the oil cylinder 59 shown moves along the X-direction, the large crank arm 12 and the small crank arm 57 levers are linked to make the crank arm protrusion 99 on the small crank arm 57 cooperate with the protrusion 19 on the sliding flange 9, so that the sliding flange 9 moves along the X+ direction. When the tip of the crank arm protrusion 99 disengages from the protrusion 19, the sliding flange 9 quickly moves and resets along the X-direction until the release claw 11 fits with the locking roller 10.

[0034] The oil cylinder 59 shown moves along the X-direction. With the cooperation of the small crank arm 57 and the large crank arm 12 levers, the crank arm protrusion 99 on the small crank arm 57 pushes the sliding flange 9 to move along the X+ direction. The roller protrusion 127 on the sliding flange 9 cooperates with the roller 55 to rotate the rotating flange 54 along the A-direction. When the tip of the crank arm protrusion 99 disengages from the protrusion 19, the sliding flange 9 quickly moves and resets along the X-direction until the inner side of the trip claw 11 fits with the locking roller 10.

[0035] Under the action of the elastic potential energy of the disc spring group 8, the oil cylinder 59 moves along the X+ direction. Under the cooperation of the large crank arm 12 and the small crank arm 57, the locking roller 10 on the large crank arm 12 transmits the force to the release claw 11, so that the sliding flange 9 is pushed along the X+ direction and moves along this direction. Under the cooperation of the roller slider composed of the roller protrusion 127 and the roller 55, the rotating flange 54 is pushed in the A- direction and rotates along this direction until the small roller 90 fits the small latch 22, the latch hook 25 on the small latch 22 is locked by the latch half shaft 26, and the rotating flange 54 is locked. At this point, the elastic potential energy of the disc spring is mechanically locked, and the hydraulic energy in the equipment disappears. After the hydraulic energy disappears, the hydraulic oil in the high-pressure chamber, the operating chamber and the low-pressure chamber is in a low-pressure state.

[0036] like Figure 4 , Figure 8 As shown, when the latch half-shaft 26 rotates, the latch hook 25 disengages from the latch half-shaft 26, and the small latch 22 rotates, so that the small latch 22 is disengaged from the small roller 90, and the rotating flange 54 rotates along the A-direction, thereby releasing the elastic potential energy of the disc spring group 8, and the elastic potential energy is converted into hydraulic energy.

[0037] Through the above structure, the working principle of the spring hydraulic operating mechanism provided by the present invention is as follows: Energy storage process: (such as Figure 1-6 As shown in FIG. 1 , the motor 14 is energized, and the crankshaft 17 is driven to rotate through the small gear 15 and the large gear 16. The crankshaft 17 drives the oil pump 6 to work, and the hydraulic oil in the valve body oil storage chamber 88 is injected into the cylinder body high pressure chamber 91 through the oil hole c7. The volume of the hydraulic oil in the cylinder body high pressure chamber 91 increases, so that the oil cylinder 59 and the flange 58 move along the X-direction (as shown in FIG. 1 ). Figure 5 As shown in the figure, the disc spring group 8 is compressed, the large crank arm 12 and the small crank arm 57 are linked by levers, so that the crank arm protrusion 99 on the small crank arm 57 cooperates with the protrusion 19 on the sliding flange 9, so that the sliding flange 9 moves along the X+ direction. When the tip of the crank arm protrusion 99 is separated from the protrusion 19, the sliding flange 9 quickly moves and resets along the X- direction until the trip claw 11 fits with the locking roller 10. The locking roller 10 moves from the outside of the trip claw 11 to the inside ( Figure 5 is the initial position, Figure 6is the end position), at this time, the energy storage motor 14 stops storing energy, and with the slow leakage of the hydraulic system, the oil cylinder 59 slowly moves along the X+ direction under the thrust of the disc spring group 8, and the large crank arm 12 and the small crank arm 57 levers are linked to make the locking roller 10 push the sliding flange 9 to move along the X+ direction, and under the cooperation of the roller slider composed of the roller protrusion 127 and the roller 55, the rotating flange 54 rotates along the A- direction until the small roller 90 fits the small latch 22, and the small latch 22 is subjected to the counterclockwise rotation force, and the latch hook 25 on the small latch 22 supports the latch half shaft 26 and makes the small latch 22 self-locking, so that the rotating flange 54 and the sliding flange 9 cannot rotate or move, so that the release claw 11 locks the locking roller 10, the elastic potential energy of the disc spring group 8 is mechanically locked, the hydraulic energy in the equipment disappears, and the locking is completed; Closing process: (such as Figure 3-6 As shown in the figure, the electromagnet B96 is energized to hit the lever B43, and the lever B43 causes the latch half shaft 26 to rotate, and the latch half shaft 26 rotates to disengage from the latch hook 25, and the small latch 22 is pushed by the small roller 90. Under the action of the elastic potential energy of the disc spring group 8, the rotating flange 54 rotates along the A- direction and the sliding flange 9 moves along the X+ direction, and the trip claw 11 is quickly separated from the locking roller 10; the hydraulic oil in the high-pressure chamber generates high-pressure hydraulic energy under the action of the disc spring; At the same time, lever B43 causes connecting rod B32 to drive valve stem B46 to move and push away steel ball B41. At this time, the high-pressure hydraulic oil in the high-pressure chamber flows from pilot high-pressure chamber 122 through the inner hole of valve sleeve B35 into pilot operating chamber 123, and then flows from oil hole s108 into valve core operating chamber 107. Valve core 44 moves upward to Figure 4 Position, the closing valve port 87 is opened, the opening valve port 86 is closed, and the high-pressure hydraulic oil in the high-pressure chamber 91 of the cylinder body flows into the piston high-pressure chamber 95 from the oil hole b5, the oil hole e20, the closing valve port 87, the oil hole p103, the oil hole o102, the oil hole z89, the oil hole d18, the oil hole a3, the oil hole g92, the oil hole h93, and the oil hole i94 in sequence, and the piston rod 50 is pushed to the X+ direction until it is in contact with the flange A62, and the switch equipment connected to the joint 48 completes the closing action. During the closing process, the elastic potential energy of the disc spring group 8 is converted into hydraulic energy and released, and the disc spring group 8 pushes the oil cylinder 59 to move along the X+ direction; Opening process: (such as Figure 3-6 As shown in the figure, the electromagnet A29 is energized to hit the lever A42, and the lever A42 causes the latch half shaft 26 to rotate, and the latch half shaft 26 rotates to disengage from the latch hook 25, and the small latch 22 is pushed by the small roller 90. Under the action of the elastic potential energy of the disc spring group 8, the rotating flange 54 rotates along the A- direction and the sliding flange 9 moves along the X+ direction, and the trip claw 11 is quickly separated from the locking roller 10; the hydraulic oil in the high-pressure chamber and the operating chamber generates high-pressure hydraulic energy under the action of the disc spring; At the same time, lever A42 causes connecting rod A30 to drive valve stem A47 to move and push away steel ball A37. At this time, the hydraulic oil in pilot operating chamber 123 flows through oil hole s108, oil hole w112, inner hole of valve sleeve A34, oil hole v111, oil hole u110, oil hole y114, oil hole x113 and flows into valve body oil storage chamber 88, and valve core 44 moves downward to Figure 6 Position, the closing valve port 87 is closed, the opening valve port 86 is opened, and the high-pressure hydraulic oil in the piston high-pressure chamber 95 flows into the valve body oil storage chamber 88 from the oil hole i94, oil hole h93, oil hole g92, oil hole a3, oil hole d18, oil hole z89, the opening valve port 86, and oil hole r105 in sequence. The piston rod 50 is pushed in the X- direction until it is limited by the flange B63. The switch equipment connected to the joint 48 completes the opening action. During the opening process, the elastic potential energy of the disc spring group 8 is converted into hydraulic energy and released, and the disc spring group 8 pushes the cylinder 59 to move along the X+ direction.

[0038] The above is a detailed introduction to a spring hydraulic operating mechanism provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A spring hydraulic operating mechanism, characterized in that: The invention comprises a spring mechanical lock system and a hydraulic system, wherein the spring mechanical lock system comprises a cylinder body (1), a valve body (13), a cover plate (21) and a bracket (78), wherein the cylinder body (1), the valve body (13), the cover plate (21) and the bracket (78) are sequentially installed in series from right to left and fixed by bolts, wherein a plurality of coaxial bosses are arranged on the outer wall of the cylinder body (1), and a rotating flange (54), a sliding flange (9), a fixed flange (65), a flange (58) and an oil cylinder (59) are sequentially installed on the plurality of bosses of the cylinder body (1) from left to right. The right end of the cylinder body (1) is threadedly mounted with a base (60), the oil cylinder (59) is located in the middle of the cylinder body (1), a guide ring (72) and a guide ring (69) are arranged on the inner hole of the oil cylinder (59), a sealing ring I (73) located on one side of the guide ring (69) is arranged in the inner hole of the oil cylinder (59), the flange (58) is mounted on the oil cylinder (59), the outside of the oil cylinder (59) and the cylinder body (1) is mounted with a disc spring group (8), and the disc spring group (8) is located between the base (60) and the flange (58); Three rollers (55) are arranged axially on the rotating flange (54), and the three rollers (55) are all fixed on the rotating flange (54) through roller pins (56). Three springs (126) are evenly arranged on the sliding flange (9), and one end of each of the three springs (126) is fixedly mounted with a guide head (125), and the three guide heads (125) are all in contact with the rotating flange (54). Three roller protrusions (127) are evenly arranged on the sliding flange (9), and the three rollers (55) and the corresponding roller protrusions (127) respectively form a roller slider structure. Six release claws (11) are evenly arranged on the sliding flange (9), and protrusions (19) are provided on the inner side walls of the six release claws (11); Six small crank arms (57) are rotatably mounted on the outer circular wall of the fixed flange (65) via a pin shaft, and the six small crank arms (57) are evenly arranged in a ring shape. Six large crank arms (12) are rotatably mounted on the outer wall of the oil cylinder (59) via a pin shaft, and the six large crank arms (12) are evenly arranged in a ring shape. One end of the six small crank arms (57) is rotatably connected to the middle part of the corresponding large crank arms (12) via a pin shaft, and one end of the six large crank arms (12) is fixed with a locking roller (10) via a pin shaft. One end of the small crank arm (57) fixed to the oil cylinder (59) is provided with a crank arm protrusion (99); A tension spring (129) is fixedly mounted on the rotating flange (54), a positioning shaft (128) is fixedly mounted on the valve body (13), one end of the tension spring (129) is fixedly connected to the positioning shaft (128), and a small roller (90) is arranged on the rotating flange (54).

2. A spring hydraulic operating mechanism according to claim 1, characterized in that: A piston rod (50) is arranged in the cylinder body (1), and a sealing ring F (68) is sleeved on the piston rod (50). A positioning sleeve (4), a sealing sleeve (61) and a flange A (62) are sleeved on the piston rod (50). The positioning sleeve (4) is threadedly connected and fixed to the cylinder body (1). A sealing ring M (77) and a sealing ring K (75) are arranged on the inner ring wall of the sealing sleeve (61), and a sealing ring J (74) and a sealing ring L (76) are arranged on the outer ring wall of the sealing sleeve (61). A flange B (63) and a cylinder base (64) are arranged at the right end inside the cylinder body (1). A sealing ring D (66) and a sealing ring E (67) are arranged on the cylinder base (64), and the cylinder base (64) is threadedly connected and fixed to the cylinder body (1).

3. A spring hydraulic operating mechanism according to claim 2, characterized in that: An oil pump (6) is fixedly mounted on the end surface of the cylinder body (1), and an oil hole c (7) and a cylinder body high-pressure chamber (91) are provided on the cylinder body (1), wherein the oil hole c (7) communicates with the oil pump (6) and the cylinder body high-pressure chamber (91).

4. A spring hydraulic operating mechanism according to claim 3, characterized in that: The valve body (13) is located on the left side of the cylinder body (1), a sealing ring C (53) is provided between the valve body (13) and the cylinder body (1), a crankshaft (17) is rotatably mounted on the left side of the valve body (13), a motor (14) is fixedly mounted on the valve body (13), a small gear (15) is fixedly mounted on the output shaft end of the motor (14), a large gear (16) is fixedly mounted on the crankshaft (17), the small gear (15) meshes with the large gear (16), a small valve sleeve (45) and a large valve sleeve (27) are installed in the valve body (13), the small valve sleeve (45) and the large valve sleeve (27) are provided with the same valve core (44), a sealing ring R (83), a sealing ring S (84) and a sealing ring T (85) are provided on the outer circumferential wall of the large valve sleeve (27), and a sealing ring Q (82) is provided on the outer circumferential wall of the small valve sleeve 45.

5. A spring hydraulic operating mechanism according to claim 4, characterized in that: A sleeve A (31), a valve sleeve A (34) and a valve seat A (36) are installed in the large valve sleeve (27). The sleeve A (31), the valve sleeve A (34) and the valve seat A (36) are fitted in sequence. A connecting rod A (30) is installed in the sleeve A (31). A valve stem A (47) is installed in the valve sleeve A (34). A steel ball A (37) and a spring A (38) are installed in the valve seat A (36). A sealing ring U (115) and a sealing ring W (117) are provided on the outer circular wall of the valve sleeve A (34). A sealing ring V (116) is provided on the inner circular wall of the valve sleeve A (34). The valve stem A (47) slides through the sealing ring V (116). The large valve sleeve A sleeve B (33), a valve sleeve B (35) and a valve seat B (39) are also installed in (27). The sleeve B (33), the valve sleeve B (35) and the valve seat B (39) are fitted in sequence. A connecting rod B (32) is installed in the sleeve B (33). A valve stem B (46) is installed in the valve sleeve B (35). A steel ball B (41) and a spring B (40) are installed in the valve seat B (39). A sealing ring α (121), a sealing ring Y (119) and a sealing ring X (118) are arranged on the outer circular wall of the valve sleeve B (35). A sealing ring Z (120) is arranged on the inner circular wall of the valve sleeve B (35). The valve stem B (46) slides through the sealing ring Z (120).

6. A spring hydraulic operating mechanism according to claim 5, characterized in that: The large valve sleeve (27) is fixedly mounted with an electromagnet flange (28) located in the valve body (13), the electromagnet flange (28) is mounted with a latch half-shaft (26), the latch half-shaft (26) is mounted with a lever A (42) and a lever B (43) located in the electromagnet flange (28), the electromagnet flange (28) is fixedly mounted with an electromagnet A (29) and an electromagnet B (96), the valve body (13) is fixedly mounted with a small latch shaft (23), the small latch shaft (23) is fixedly mounted with a small latch (22) and a torsion spring a (24), one end of the small latch (22) is provided with a hook-shaped latch hook (25), the latch hook (25) is adapted to the latch half-shaft (26).

7. A spring hydraulic operating mechanism according to claim 2, characterized in that: The bracket (78) is located on the left side of the valve body (13), and the left end of the piston rod (50) is threadedly connected to a joint (48) and a locking nut (49).

8. The spring hydraulic operating mechanism according to claim 6, characterized in that: The valve body (13) is provided with an oil hole d (18) and an oil hole e (20), and the cylinder body (1) is provided with an oil hole a (3) and an oil hole b (5). The oil hole d (18) and the oil hole a (3) are connected and sealed via a sealing sleeve (2), and the oil hole e (20) and the oil hole b (5) are connected and sealed via a sealing sleeve (2). A sealing ring N (79) is provided on the sealing sleeve (2).

9. A spring hydraulic operating mechanism according to claim 8, characterized in that: The hydraulic system comprises a high-pressure chamber, an operating chamber and a low-pressure chamber. The high-pressure chamber is composed of a cylinder high-pressure chamber (91), a piston high-pressure chamber (95), a valve core high-pressure chamber (106), a pilot high-pressure chamber (122), an oil hole b (5), an oil hole c (7), an oil hole k (98), an oil hole m (100), an oil hole e (20), an oil hole n (101) and an oil hole t (109). A sealing ring G (70) and a sealing ring H (71) are provided between the cylinder body (1) and the oil cylinder (59). The cylinder high-pressure chamber (91) is a space enclosed by the cylinder body (1), the oil cylinder (59), the sealing ring G (70) and the sealing ring H (71). The cylinder body (1) is provided with sealing rings F (68), J (74), K (75), L (76) and M (77). The piston high-pressure chamber (95) is a cylinder high-pressure chamber. The inner hole of the cylinder body (1) is a space enclosed by the piston rod (50) and the sealing sleeve (61), the flange A (62), the sealing ring F (68), the sealing ring J (74), the sealing ring K (75), the sealing ring L (76) and the sealing ring M (77); the cylinder body (1) is provided with a sealing ring R (83), a sealing ring S (84), a sealing ring P (81) and a closing valve port (87); the valve core high pressure chamber (106) is a space enclosed by the inner hole of the small valve sleeve (45) and the outer circle of the valve core (44), the sealing ring R (83), the sealing ring S (84), the sealing ring P (81) and the closing valve port (87); the cylinder body (1) is provided with a sealing ring X (118) and a steel ball B (41); the pilot high pressure chamber (122) is a space enclosed by the large valve sleeve (27) and the valve sleeve B (35), the sealing ring X (118) and the steel ball B (41).

10. A spring hydraulic operating mechanism according to claim 9, characterized in that: The operating chamber is composed of a piston operating chamber (97), a valve core operating chamber (107), a pilot operating chamber (123), an oil hole d (18), an oil hole z (89), an oil hole a (3), an oil hole g (92), an oil hole h (93), an oil hole i (94), an oil hole o (102), an oil hole p (103), an oil hole q (104), an oil hole s (108), and an oil hole w (112). The piston rod (50) is sleeved with a sealing ring F (68), a sealing ring D (66), and a sealing ring E (67). The piston operating chamber (97) is The space enclosed by the flange B (63), the cylinder base (64), the sealing ring F (68), the sealing ring D (66) and the sealing ring E (67) in the cylinder body (1); the sealing ring O (80) and the gate valve port (86) are installed on the valve core (44); the valve core operating chamber (107) is the space enclosed by the valve core (44), the sealing ring O (80) and the gate valve port (86) in the large valve sleeve (27); the sealing ring O (80) is used to divide the valve core operating chamber (107) into two parts and pass through the oil hole p (103) and the oil hole q (104), the pilot operating chamber (123) is a space enclosed by the sealing ring Y (119) and the sealing ring X (118) of the valve sleeve B (35) in the large valve sleeve (27) and the valve seat A (36), and is sealed by the sealing ring X (118), the sealing ring Y (119), the sealing ring W (117), the steel ball A (37) and the steel ball B (41), respectively. The low-pressure chamber is composed of the valve body oil storage chamber (88), the pilot low-pressure chamber (124), the oil hole u (110), the oil hole v (111), the oil hole y (114), the oil hole x (114), the oil hole y (114), the oil hole x (115), the oil hole y (116), the oil hole y (117), the oil hole y (118), the oil hole y (119), the oil hole y (117), the oil hole y (114), the oil hole y (115), the oil hole y (116), the oil hole y (117), the oil hole y (118), the oil hole y (119 ...8), the oil hole y (118), the oil hole y (119), the oil hole y (117), the oil hole y (117), the oil hole y (118), the oil hole y (118), the oil hole y (118), the oil hole y (118 (113), and an oil hole r (105); the valve body oil storage chamber (88) is an internal cavity of the valve body (13), which is placed between the cover plate (21) and the cylinder body (1) for storing hydraulic oil and is sealed by a sealing ring A (51), a sealing ring B (52) and a sealing ring C (53); the pilot low-pressure chamber (124) is a cavity between the large valve sleeve (27), the sealing ring Y (119) on the inner valve sleeve B (35) and the sealing ring α (121), and between the sealing ring W (117) and the sealing ring U (115) on the valve sleeve A (34).

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