Spring hydraulic operating mechanism

Abstract

The utility model 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 advantages that after the mechanical lock system is locked, 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, the probability of frequent pressure relief and energy storage is effectively reduced, and the service life of the hydraulic system is prolonged. 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 application relates to the technical field of high-voltage power transmission and distribution, in particular to a spring hydraulic operating mechanism. BACKGROUND

[0002] A circuit breaker refers to a switching device capable of closing, carrying and opening the current under normal circuit conditions and capable of closing, carrying and opening 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 use. Circuit breakers can be used to distribute power, infrequently start asynchronous motors, and protect power lines and motors. When they experience serious overloads or short circuits and under-voltage failures, they can automatically cut off the circuit, which is equivalent to the combination of a fuse-type switch and an over-voltage relay. After breaking the fault current, the circuit breaker generally does not need to change parts. High-voltage circuit breakers are important equipment in the field of high-voltage power transmission and distribution, and 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 related technologies, 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 applied to high-voltage circuit breakers generally has the problems of small output power and poor mechanical stability. 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 a spring hydraulic operating mechanism to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a spring hydraulic operating mechanism, which greatly reduces the probability of hydraulic oil leakage, effectively reduces the probability of frequent pressure relief and energy storage, improves the reliability of the high-voltage circuit breaker, and ensures the stable operation of the power grid.

[0006] The above technical purpose of the present application is achieved by the following technical scheme: a spring hydraulic operating mechanism, comprising a spring mechanical lock system and a hydraulic system, the spring mechanical lock system comprising a cylinder body, a valve body, a cover plate and a bracket, the cylinder body, the valve body, the cover plate and the bracket being installed in series from right to left and fixed by bolts, a plurality of coaxial bosses being arranged on the outer wall of the cylinder body, a rotating flange, a sliding flange, a fixed flange, a flange and an oil cylinder being sequentially sleeved on the bosses of the cylinder body from left to right, a base being threadedly installed at the right end of the cylinder body, the oil cylinder being located at the middle part of the cylinder body, a guide ring B and a guide ring A being arranged on the inner hole of the oil cylinder, a sealing ring I being arranged on the inner hole of the oil cylinder on the side of the guide ring A, the flange being sleeved on the oil cylinder, a disc spring set being sleeved on the outside of the oil cylinder and the cylinder body, the disc spring set being located between the base and the flange;

[0007] The rotating flange is provided with three rollers arranged in the axial direction, the three rollers are fixed on the rotating flange through roller pins, the sliding flange is provided with three springs arranged uniformly, one end of each of the three springs is fixedly provided with a guide head, the three guide heads are in abutment with the rotating flange, the sliding flange is provided with three roller blocks arranged uniformly, the three rollers and the corresponding roller blocks respectively form roller block structures, and the sliding flange is provided with six tripping claws arranged uniformly, and the inner side wall of each of the six tripping claws is provided with a protrusion.

[0008] The outer circular wall of the fixed flange is provided with six small crank arms rotatably installed through pins, the six small crank arms are arranged in a ring shape and uniformly, the outer wall of the oil cylinder is provided with six large crank arms rotatably installed through pins, the six large crank arms are arranged in a ring shape and uniformly, one end of each of the six small crank arms is rotatably connected with the middle part of the corresponding large crank arm through a pin, and one end of each of the six large crank arms is fixedly provided with a locking roller through a pin.

[0009] The rotating flange is provided with a tension spring fixedly installed, the valve body is provided with a positioning shaft fixedly installed, one end of the tension spring is fixedly connected to the positioning shaft, and the rotating flange is provided with a small roller.

[0010] Further settings of the present application are that the cylinder body is provided with a piston rod, the piston rod is provided with a sealing ring F, the piston rod is provided with a positioning sleeve, a sealing sleeve and a flange A, the positioning sleeve is fixedly connected with the cylinder body in a threaded manner, the inner annular wall of the sealing sleeve is provided with a sealing ring M and a sealing ring K, the outer annular wall of the sealing sleeve is provided with a sealing ring J and a sealing ring L, the right end of the cylinder body is provided with a flange B and a cylinder base, the cylinder base is provided with a sealing ring D and a sealing ring E, and the cylinder base is fixedly connected with the cylinder body in a threaded manner.

[0011] Further settings of the present application are that the oil pump is fixedly installed on the end face of the cylinder body, the oil hole c and the cylinder high-pressure cavity are formed in the cylinder body, and the oil hole c communicates the oil pump with the cylinder high-pressure cavity.

[0012] Further settings of the present application are that the valve body is located on the left side of the cylinder body, the valve body and the cylinder body are provided with a sealing ring C, the valve body is rotatably installed on the left side of the valve body, the valve body is fixedly installed with a motor, the output shaft end of the motor is fixedly installed with a small gear, the crankshaft is fixedly installed with a large gear, the small gear is engaged with the large gear, the valve body is installed with a small valve sleeve and a large valve sleeve, the same valve core is installed in the small valve sleeve and the large valve sleeve, the outer circular wall of the large valve sleeve is provided with a sealing ring R, a sealing ring S and a sealing ring T, and the outer circular wall of the small valve sleeve is provided with a sealing ring Q.

[0013] Further, the large valve sleeve is internally provided with a sleeve A, a valve sleeve A and a valve seat A, which are sequentially attached, the sleeve A is internally provided with a connecting rod A, the valve sleeve A is internally provided with a valve rod A, the valve seat A is internally provided with a steel ball A and a spring A, the outer circular wall of the valve sleeve A is provided with a sealing ring U and a sealing ring W, the inner circular wall of the valve sleeve A is provided with a sealing ring V, the valve rod A is slidably penetrated through the sealing ring V, the large valve sleeve is further internally provided with a sleeve B, a valve sleeve B and a valve seat B, which are sequentially attached, the sleeve B is internally provided with a connecting rod B, the valve sleeve B is internally provided with a valve rod B, the valve seat B is internally provided with a steel ball B and a spring B, the outer circular wall of the valve sleeve B is provided with a sealing ring alpha, a sealing ring Y and a sealing ring X, the inner circular wall of the valve sleeve B is provided with a sealing ring Z, and the valve rod B is slidably penetrated through the sealing ring Z.

[0014] Further, the large valve sleeve is internally provided with a sleeve A, a valve sleeve A and a valve seat A, which are sequentially attached, the sleeve A is internally provided with a connecting rod A, the valve sleeve A is internally provided with a valve rod A, the valve seat A is internally provided with a steel ball A and a spring A, the outer circular wall of the valve sleeve A is provided with a sealing ring U and a sealing ring W, the inner circular wall of the valve sleeve A is provided with a sealing ring V, the valve rod A is slidably penetrated through the sealing ring V, the large valve sleeve is further internally provided with a sleeve B, a valve sleeve B and a valve seat B, which are sequentially attached, the sleeve B is internally provided with a connecting rod B, the valve sleeve B is internally provided with a valve rod B, the valve seat B is internally provided with a steel ball B and a spring B, the outer circular wall of the valve sleeve B is provided with a sealing ring alpha, a sealing ring Y and a sealing ring X, the inner circular wall of the valve sleeve B is provided with a sealing ring Z, and the valve rod B is slidably penetrated through the sealing ring Z.

[0015] Further, 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.

[0016] Further, the valve body is provided with an oil hole d and an oil hole e, and 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 the sealing sleeve is provided with a sealing ring N.

[0017] Further, the hydraulic system comprises a high-pressure cavity, an operating cavity and a low-pressure cavity, the high-pressure cavity is composed of a cylinder body high-pressure cavity, a piston high-pressure cavity, a valve core high-pressure cavity, a pilot high-pressure cavity, an oil hole b, an oil hole c, an oil hole k, an oil hole m, an oil hole e, an oil hole n and an oil hole t, the cylinder body and the oil cylinder are provided with a sealing ring G and a sealing ring H, the cylinder body high-pressure cavity is a space surrounded by the cylinder body, the oil cylinder, the sealing ring G and the sealing ring H, the cylinder body is provided with a sealing ring F, a sealing ring J, a sealing ring K, a sealing ring L and a sealing ring M, the piston high-pressure cavity is a space surrounded by the piston rod in the cylinder body hole, a sealing sleeve, a flange A, the sealing ring F, the sealing ring J, the sealing ring K, the sealing ring L and the sealing ring M, the cylinder body is provided with a sealing ring R, a sealing ring S, a sealing ring P and a closing valve port, the valve core high-pressure cavity is a space surrounded by the small valve sleeve inner hole, a valve core outer circle, the sealing ring R, the sealing ring S, the sealing ring P and the closing valve port, the cylinder body is provided with a sealing ring X and a steel ball B, and the pilot high-pressure cavity is a space surrounded by the large valve sleeve, the valve sleeve B, the sealing ring X and the steel ball B.

[0018] Further provided in the application is that the operation cavities are composed of a piston operation cavity, a valve core operation cavity, a pilot operation cavity, oil holes d, oil holes z, oil holes a, oil holes g, oil holes h, oil holes i, oil holes o, oil holes p, oil holes q, oil holes s, and oil holes w; the piston rod is sleeved with sealing rings F, D, and E; the piston operation cavity is a space surrounded by the flange B in the cylinder body, the cylinder base, the sealing ring F, the sealing ring D, and the sealing ring E; the valve core is provided with a sealing ring O and a split gate valve port; the valve core operation cavity is a space surrounded by the valve core in the large valve sleeve, the sealing ring O, and the split gate valve port; the sealing ring O is used to divide the valve core operation cavity into two parts and is communicated through the oil holes p and q; the pilot operation cavity is a space surrounded by the sealing ring Y and the sealing ring X between the valve sleeve B in the large valve sleeve and the valve seat A; the sealing ring X, the sealing ring Y, the sealing ring W, the steel ball A, and the steel ball B are used for sealing; the low-pressure cavity is composed of a valve body oil storage cavity, a pilot low-pressure cavity, oil holes u, v, y, x, and r; the valve body oil storage cavity is an internal cavity of the valve body, is arranged between the cover plate and the cylinder body, and is used 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 cavity is a cavity between the sealing ring Y and the sealing ring a on the large valve sleeve and the sealing ring W and the sealing ring U on the valve sleeve A.

[0019] The application has at least one of the following beneficial technical effects:

[0020] The spring hydraulic operating mechanism composed of the spring mechanical lock system and the hydraulic system can combine the advantages of the spring operating mechanism and the hydraulic operating mechanism, i.e., in the steady state, the mechanism is in zero pressure state and does not need to store energy and supplement pressure, and in the operation, the mechanism operates according to the principle of the hydraulic mechanism, so that the advantages of the two mechanisms are combined and the respective shortcomings of the two mechanisms are discarded, thereby meeting the highest and most comprehensive requirements of the modern power grid.

[0021] The spring hydraulic operating mechanism composed of the spring mechanical lock system and the hydraulic system can combine the advantages of the spring operating mechanism and the hydraulic operating mechanism, i.e., in the steady state, the mechanism is in zero pressure state and does not need to store energy and supplement pressure, and in the operation, the mechanism operates according to the principle of the hydraulic mechanism, so that the advantages of the two mechanisms are combined and the respective shortcomings of the two mechanisms are discarded, thereby meeting the highest and most comprehensive requirements of the modern power grid. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0023] Figure 1 Fig. 5 is a top view of a spring hydraulic operating mechanism cylinder according to the present application;

[0024] Figure 2 Fig. 6 is a top view of a spring hydraulic operating mechanism valve body according to the present application;

[0025] Figure 3 Fig. 7 is a B-B view of a spring hydraulic operating mechanism according to the present application;

[0026] Figure 4 Fig. 8 is a C-C view of a spring hydraulic operating mechanism according to the present application;

[0027] Figure 5 Fig. 9 is an A-A view of a spring hydraulic operating mechanism according to the present application;

[0028] Figure 6 Fig. 10 is an A-A view of a spring hydraulic operating mechanism according to the present application;

[0029] Figure 7 Fig. 11 is a D view of a spring hydraulic operating mechanism according to the present application;

[0030] Figure 8 Fig. 12 is a partial three-dimensional view of a spring hydraulic operating mechanism according to the present application.

[0031] Figure; 1, cylinder; 2, sealing sleeve; 3, oil hole a; 4, positioning sleeve; 5, oil hole b; 6, oil pump; 7, oil hole c; 8, disc spring group; 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, protrusion; 20, oil hole e; 21, cover plate; 22, small roller; 23, small roller shaft; 24, torsion spring a; 25, roller hook; 26, roller 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 rod B; 47, valve rod 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 A; 70, sealing ring G; 71, sealing ring H; 72, guide ring B; 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, opening valve port; 87, closing valve port; 88, valve body oil storage cavity; 89, oil hole z; 90, small roller; 91, cylinder high pressure cavity; 92, oil hole g; 93, oil hole h; 94, oil hole i; 95, piston high pressure cavity; 96, electromagnet B; 97, piston operating cavity; 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 cavity; 107, valve core operating cavity; 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 a; 122, pilot high pressure cavity; 123, pilot operating cavity; 124, pilot low pressure cavity; 125, guide head; 126, spring; 127, roller protrusion; 128, positioning shaft; 129, tension spring. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely in combination with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] Referring to Figures 1-8 The present application provides 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 1, a valve body 13, a cover plate 21 and a bracket 78, which are sequentially and serially installed from right to left and fixed by bolts. The outer wall of the cylinder body 1 is provided with a plurality of coaxial bosses. The plurality of bosses of the cylinder body 1 are sequentially and serially sleeved with a rotating flange 54, a sliding flange 9, a fixed flange 65, a flange 58 and an oil cylinder 59 from left to right. The rotating flange 54 can only rotate around the central axis of the cylinder body 1 (A+A- direction). The sliding flange 9 can only slide along the outer axis of the cylinder body 1. The right end of the cylinder body 1 is threadedly installed with a base 60. The oil cylinder 59 is located at the middle part of the cylinder body 1. The inner hole of the oil cylinder 59 is provided with a guide ring B 72 and a guide ring A 69. By using the guide ring B 72 and the guide ring A 69, the oil cylinder 59 can slide along the outer axis of the cylinder body 1 (X+X- direction). The inner hole of the oil cylinder 59 is provided with a sealing ring I 73 located on the side of the guide ring A 69. The flange 58 is sleeved on the oil cylinder 59. The outer part of the oil cylinder 59 and the cylinder body 1 is sleeved with a disc spring set 8. The disc spring set 8 is located between the base 60 and the flange 58. The base 60 and the flange 58 are used to limit the disc spring set 8.

[0034] The rotating flange 54 is provided with three rollers 55 in the axial direction. The three rollers 55 are fixed on the rotating flange 54 by roller pin shafts 56. The sliding flange 9 is provided with three springs 126. One end of each spring 126 is fixedly installed with a guide head 125. The three guide heads 125 are in abutment with the rotating flange 54. The guide head 125 is always in abutment with the rotating flange 54 by the elastic force of the spring 126. The sliding flange 9 is provided with three roller blocks 127. The three rollers 55 and the corresponding roller blocks 127 form a roller block structure. The sliding flange 9 is provided with six tripping claws 11. The inner side wall of each tripping claw 11 is provided with a protrusion 19. The sliding flange 9 is pushed by the X- direction under the action of the guide head 125 spring 126. The protrusion 19 on the sliding flange 9 is in abutment or sliding with the crank block 99 on the small crank arm 57. The tripping claw 11 on the sliding flange 9 is in abutment with the locking roller 10 on the uniformly distributed large crank arm 12.

[0035] Six small cranks 57 are rotatably installed on the outer wall of the fixed flange 65 by pin shafts, and are arranged in a ring shape. Six large cranks 12 are rotatably installed on the outer wall of the oil cylinder 59 by pin shafts, and are arranged in a ring shape. One end of each of the six small cranks 57 is rotatably connected to the middle part of the corresponding large crank 12 by a pin shaft. One end of each of the six large cranks 12 is fixedly provided with a locking roller 10 by a pin shaft. The end of the small crank 57 fixed to the oil cylinder 59 is provided with a crank protrusion 99.

[0036] The rotating flange 54 is fixedly provided with a pull spring 129. The valve body 13 is fixedly provided with a positioning shaft 128. One end of the pull spring 129 is fixedly connected to the positioning shaft 128. The rotating flange 54 is provided with a small roller 90. The pull spring 129 applies a restoring force to the rotating flange 54 in the A+ direction.

[0037] In this embodiment, the cylinder body 1 is provided with a piston rod 50. The piston rod 50 is sleeved with a sealing ring F68. The piston rod 50 is sleeved with a positioning sleeve 4, a sealing sleeve 61, and a flange A 62. The piston rod 50 can axially slide (X+X- direction) in the inner hole of the cylinder body 1 and is limited by the flange A 62 and the flange B 63. The positioning sleeve 4 is fixedly connected to the cylinder body 1 in a threaded manner. The inner annular wall of the sealing sleeve 61 is provided with a sealing ring M77 and a sealing ring K75. The outer annular wall of the sealing sleeve 61 is provided with a sealing ring J74 and a sealing ring L76. The right end of the inside of the cylinder body 1 is provided with a flange B 63 and a cylinder base 64. The cylinder base 64 is provided with a sealing ring D66 and a sealing ring E67. The cylinder base 64 is fixedly connected to the cylinder body 1 in a threaded manner.

[0038] The cylinder body 1 is fixedly provided with an oil pump 6 on the end face. The cylinder body 1 is provided with an oil hole c7 and a cylinder high-pressure cavity 91. The oil hole c7 connects the oil pump 6 and the cylinder high-pressure cavity 91.

[0039] In this embodiment, the valve body 13 is located on the left side of the cylinder body 1. The valve body 13 and the cylinder body 1 are provided with a sealing ring C53. The valve body 13 is rotatably installed on the left side of the valve body 13. The valve body 13 is fixedly provided with a motor 14. The output shaft end of the motor 14 is fixedly provided with a small gear 15. The crankshaft 17 is fixedly provided with a large gear 16. The small gear 15 is engaged with the large gear 16. The motor 14 can drive the crankshaft 17 to rotate through gear transmission. The valve body 13 is provided with a small valve sleeve 45 and a large valve sleeve 27. The same valve core 44 is installed in the small valve sleeve 45 and the large valve sleeve 27. The outer circular wall of the large valve sleeve 27 is provided with a sealing ring R83, a sealing ring S84, and a sealing ring T85. The outer circular wall of the small valve sleeve 45 is provided with a sealing ring Q82.

[0040] In the embodiment, the large valve sleeve 27 is provided with the sleeve A 31, the valve sleeve A 34 and the valve seat A 36 which are sequentially attached, the sleeve A 31 is provided with the connecting rod A 30, the valve sleeve A 34 is provided with the valve rod A 47, the valve seat A 36 is provided with the steel ball A 37 and the spring A 38, the outer wall of the valve sleeve A 34 is provided with the sealing ring U 115 and the sealing ring W 117, the inner wall of the valve sleeve A 34 is provided with the sealing ring V 116, the valve rod A 47 slides through the sealing ring V 116, the large valve sleeve 27 is further provided with the sleeve B 33, the valve sleeve B 35 and the valve seat B 39 which are sequentially attached, the sleeve B 33 is provided with the connecting rod B 32, the valve sleeve B 35 is provided with the valve rod B 46, the valve seat B 39 is provided with the steel ball B 41 and the spring B 40, the outer wall of the valve sleeve B 35 is provided with the sealing ring a 121, the sealing ring Y 119 and the sealing ring X 118, the inner wall of the valve sleeve B 35 is provided with the sealing ring Z 120, the valve rod B 46 slides through the sealing ring Z 120.

[0041] In the embodiment, the large valve sleeve 27 is provided with the electromagnet flange 28 which is fixedly installed in the valve body 13, the electromagnet flange 28 is provided with the half shaft 26, the half shaft 26 is provided with the lever A 42 and the lever B 43 which are installed in the electromagnet flange 28, the electromagnet flange 28 is fixedly installed with the electromagnet A 29 and the electromagnet B 96, the valve body 13 is fixedly installed with the small half shaft 23, the small half shaft 23 is fixedly installed with the small hook 22 and the torsional spring a 24, one end of the small hook 22 is provided with the hook-shaped hook 25 which is matched with the half shaft 26, the small hook 22 can rotate around the small half shaft 23 and be reset by the torsional spring a 24, the hook 25 of the small hook 22 can be locked by the half shaft of the half shaft 26, the half shaft 26 can be rotated to unlock the hook 25 so as to rotate the small hook 22, when the rotating flange 54 rotates to a certain stroke in the A direction, the small roller 90 is attached to the small hook 22 to rotate the small hook 22 counterclockwise, the hook 25 of the small hook 22 is locked by the half shaft of the half shaft 26, and the rotation of the rotating flange 54 can be locked.

[0042] In the embodiment, the bracket 78 is located on the left side of the valve body 13, the left end of the piston rod 50 is threadedly connected with the joint 48 and the locking nut 49, and the joint 48 is used to connect the switch device matched with the application.

[0043] In the embodiment, the valve body 13 is provided with the oil hole d 18 and the oil hole e 20, the cylinder body 1 is provided with the oil hole a 3 and the oil hole b 5, the oil hole d 18 and the oil hole a 3 are connected and sealed by the sealing sleeve 2, the oil hole e 20 and the oil hole b 5 are connected and sealed by the sealing sleeve 2, and the sealing sleeve 2 is provided with the sealing ring N 79.

[0044] In this embodiment, the hydraulic system includes a high-pressure chamber, an operating chamber, and a low-pressure chamber. The high-pressure chamber communicates with the operating chamber when the closing valve port 87 is opened and the opening valve port 86 is closed. The operating chamber communicates with the low-pressure chamber when the closing valve port 87 is closed and the opening valve port 86 is opened. Figure Five The piston rod 50 is in the X+ direction closing position when the high-pressure chamber communicates with the operating chamber. Figure Six The piston rod 50 is in the X- direction opening position when the operating chamber communicates with the low-pressure chamber. The closing valve port 86 is closed and the opening valve port 87 is opened when the valve core 44 and the small valve sleeve 45 are in contact. The closing valve port 86 is opened and the opening valve port 87 is closed when the valve core 44 and the large valve sleeve 27 are in contact.

[0045] The high-pressure chamber is composed of the cylinder high-pressure chamber 91, the piston high-pressure chamber 95, the valve core high-pressure chamber 106, the pilot high-pressure chamber 122, the oil hole b5, the oil hole c7, the oil hole k98, the oil hole m100, the oil hole e20, the oil hole n101, and the oil hole t109. The sealing ring G70 and the sealing ring H71 are arranged between the cylinder 1 and the oil cylinder 59. The cylinder high-pressure chamber 91 is the space surrounded by the cylinder 1, the oil cylinder 59, the sealing ring G70, and the sealing ring H71. The sealing ring F68, the sealing ring J74, the sealing ring K75, the sealing ring L76, and the sealing ring M77 are arranged in the cylinder 1. The piston high-pressure chamber 95 is the space surrounded by the piston rod 50, the sealing sleeve 61, the flange A62, the sealing ring F68, the sealing ring J74, the sealing ring K75, the sealing ring L76, and the sealing ring M77 in the cylinder 1. The sealing ring R83, the sealing ring S84, the sealing ring P81, and the closing valve port 87 are arranged in the cylinder 1. The valve core high-pressure chamber 106 is the space surrounded by the small valve sleeve 45, the valve core 44, the sealing ring R83, the sealing ring S84, the sealing ring P81, and the closing valve port 87. The sealing ring X118 and the steel ball B41 are arranged in the cylinder 1. The pilot high-pressure chamber 122 is the space surrounded by the large valve sleeve 27, the valve sleeve B35, the sealing ring X118, and the steel ball B41.

[0046] In this embodiment, the operating chamber consists of a piston operating chamber 97, a valve core operating chamber 107, a pilot operating chamber 123, oil holes d18, z89, a3, g92, h93, i94, o102, p103, q104, s108, and w112. A sealing ring F68, D66, and E67 are fitted onto the piston rod 50. The piston operating chamber 97... The space enclosed by flange B63, cylinder base 64, sealing ring F68, sealing ring D66, and sealing ring E67 within 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 within large valve sleeve 27; sealing ring O80 divides valve core operating chamber 107 into two parts and passes through oil hole p103 and oil hole q1. 04. The pilot operating chamber 123 is the space enclosed by the portion between the sealing ring Y119 and sealing ring X118 of the valve sleeve B35 inside the large valve sleeve 27 and the valve seat A36. It is sealed by sealing ring X118, sealing ring Y119, sealing ring W117, steel ball A37, and steel ball B41, respectively. The low-pressure chamber is composed of the valve body oil storage chamber 88, the pilot low-pressure chamber 124, oil hole u110, oil hole v111, oil hole y114, and oil hole x1. 13. Composed of 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 1 to store hydraulic oil, and sealed by sealing rings A51, B52 and C53. The pilot low pressure chamber 124 is the cavity between the sealing ring Y119 and sealing ring α121 on the large valve sleeve 27 and the inner valve sleeve B35, and between the sealing ring W117 and sealing ring U115 on the valve sleeve A34.

[0047] In this embodiment, when the sliding flange 9 moves along the X+ direction, the roller block 127 and the roller 55 cooperate to rotate the rotating flange 54 along the A- direction. When it rotates to a certain angle, the small roller 90 on the rotating flange 54 is caught 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. Under the action of the guide head 125 and the spring 126, the sliding flange 9 moves and resets along the X- direction until it is in contact with the fixed flange 65 and limited. Under the action of the tension spring 129, the rotating flange 54 rotates and resets along the A+ direction.

[0048] like Figure 6 When the cylinder 59 shown moves along the X- direction, the large crank arm 12 and the small crank arm 57 are linked together, causing the crank arm protrusion 99 on the small crank arm 57 to engage with the protrusion 19 on the sliding flange 9, causing the sliding flange 9 to move along the X+ direction. When the tip of the crank arm protrusion 99 disengages from the protrusion 19, the sliding flange 9 moves rapidly along the X- direction to reset until the release claw 11 engages with the locking roller 10.

[0049] The shown oil cylinder 59 moves along the X-direction, under the cooperation of the small crank arm 57 and the large crank arm 12 lever, 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 make the rotating flange 54 rotate along the A- direction, when the protrusion tip of the crank arm protrusion 99 is separated from the protrusion 19, the sliding flange 9 quickly moves along the X- direction to reset until the inside surface of the tripping claw 11 is attached to the locking roller 10.

[0050] Under the elastic potential energy of the disc spring set 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 lever, the locking roller 10 on the large crank arm 12 transmits force to the tripping 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 protrusion 127 and the roller 55, the rotating flange 54 is pushed along the A- direction and rotates along this direction until the small roller 90 is attached to the small protrusion 22, the protrusion hook 25 on the small protrusion 22 is locked by the protrusion half shaft 26, and the rotating flange 54 is locked. At this time, the elastic potential energy of the disc spring is mechanically locked, and the hydraulic energy in the device disappears. After the hydraulic energy disappears, the hydraulic oil in the high-pressure cavity, the operating cavity and the low-pressure cavity is in a low-pressure state.

[0051] As shown in Figure 4 , Figure 8 , when the protrusion half shaft 26 rotates, the protrusion hook 25 is separated from the protrusion half shaft 26, the small protrusion 22 rotates to separate the small protrusion 22 from the small roller 90, and the rotating flange 54 rotates along the A- direction, so that the elastic potential energy of the disc spring set 8 can be released, and the elastic potential energy is converted into hydraulic energy.

[0052] Through the above structure, the working principle of the spring hydraulic operating mechanism provided by the present application is as follows:

[0053] Energy storage process: (as shown in Figures 1-6 ) The motor 14 is energized, the small gear 15 and the large gear 16 drive the crankshaft 17 to rotate, the crankshaft 17 drives the oil pump 6 to work, and the hydraulic oil in the valve body oil storage cavity 88 is injected into the cylinder high-pressure cavity 91 through the oil hole c7, the volume of the hydraulic oil in the cylinder high-pressure cavity 91 increases, and the oil cylinder 59 and the flange 58 move along the X- direction (as shown in Figure 5 ) to compress the disc spring set 8, the large crank arm 12 and the small crank arm 57 are connected by a lever, the crank arm protrusion 99 on the small crank arm 57 cooperates with the protrusion 19 on the sliding flange 9, the sliding flange 9 moves along the X+ direction, when the protrusion tip of the crank arm protrusion 99 is separated from the protrusion 19, the sliding flange 9 quickly moves along the X- direction to reset until the tripping claw 11 is attached to the locking roller 10. The locking roller 10 moves from the outside of the tripping claw 11 to the inside (as shown in Figure 5 , which is the initial position, Figure 6To terminate the position), at this time the energy storage motor 14 stop energy storage complete, with the slow leakage of hydraulic system, the oil cylinder 59 in the spring group 8 under the thrust of the slow X + direction along the large arm 12 and small arm 57 lever linkage, make the locking roller 10 push the sliding flange 9 along the X + direction, under the roller block 127 and roller 55 group of roller block cooperation, make the rotating flange 54 along A- direction rotation, until the small roller 90 stick to small hook 22, small hook 22 by the counterclockwise rotation force, hook hook 25 on the small hook 22 top off hook half shaft 26 and make small hook 22 self locking, until the rotating flange 54 sliding flange 9 can't rotate or move, so that the tripping claw 11 lock the locking roller 10, the spring force potential energy of the disc spring group 8 is locked mechanically, the hydraulic energy in the equipment disappears, the locking is completed;

[0054] The closing process: (as shown in Figures 3-6 The electromagnet B96 is electrified to hit the lever B43, the lever B43 makes the hook half shaft 26 rotate, the hook half shaft 26 rotates to disengage the hook hook 25, the small hook 22 is pushed by the small roller 90, under the action of the spring force potential energy of the disc spring group 8, the rotating flange 54 rotates along A- direction and the sliding flange 9 moves along X + direction, the tripping claw 11 and the locking roller 10 are quickly separated; The high pressure cavity hydraulic oil generates high pressure hydraulic energy under the action of the disc spring;

[0055] At the same time, the lever B43 makes the connecting rod B32 drive the valve rod B46 to move and push away the steel ball B41, at this time the high pressure cavity high pressure hydraulic oil flows from the pilot high pressure cavity 122 through the valve sleeve B35 inner hole into the pilot operation cavity 123, and then flows into the valve core operation cavity 107 from the oil hole s108, the valve core 44 moves upward to Figure Four The position, the closing valve port 87 is opened, the opening valve port 86 is closed, the high pressure hydraulic oil in the cylinder high pressure cavity 91 flows into the piston high pressure cavity 95 in turn 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, the oil hole i94, the piston rod 50 is pushed to X + direction until it is limited by flange A62, the switch device connected by the joint 48 completes the closing action, the spring force potential energy of the disc spring group 8 is converted into hydraulic energy and released during the closing process, the disc spring group 8 pushes the oil cylinder 59 to move along X + direction;

[0056] The opening process: (as shown in Figures 3-6 The electromagnet A29 is electrified to hit the lever A42, the lever A42 makes the hook half shaft 26 rotate, the hook half shaft 26 rotates to disengage the hook hook 25, the small hook 22 is pushed by the small roller 90, under the action of the spring force potential energy of the disc spring group 8, the rotating flange 54 rotates along A- direction and the sliding flange 9 moves along X + direction, the tripping claw 11 and the locking roller 10 are quickly separated; The high pressure cavity and operation cavity hydraulic oil generates high pressure hydraulic energy under the action of the disc spring;

[0057] At the same time, the lever A42 drives the connecting rod A30 to move the valve rod A47 to push away the steel ball A37. At this time, the hydraulic oil in the pilot operating cavity 123 flows through the oil hole s108, the oil hole w112, the hole in the valve sleeve A34, the oil hole v111, the oil hole u110, the oil hole y114, the oil hole x113 into the valve body oil storage cavity 88, and the valve core 44 moves downward to the Figure Six position, the closing valve port 87 is closed, the opening valve port 86 is opened, the high-pressure hydraulic oil in the piston high-pressure cavity 95 flows into the valve body oil storage cavity 88 through the oil hole i94, the oil hole h93, the oil hole g92, the oil hole a3, the oil hole d18, the oil hole z89, the opening valve port 86 and the oil hole r105 in turn, and the piston rod 50 is pushed to the X-direction until it is limited by the flange B63. The switch device connected by the joint 48 completes the opening operation, and the elastic potential energy of the disc spring set 8 is converted into hydraulic energy and released during the opening process. The disc spring set 8 pushes the oil cylinder 59 to move along the X+ direction.

[0058] The spring hydraulic operating mechanism provided by the present application is described in detail above. The principles and implementation methods of the present application are described by applying specific examples in this paper. The above examples are only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A spring-hydraulic operating mechanism characterized by comprising: The hydraulic system comprises a cylinder (1), a valve body (13), a cover plate (21) and a bracket (78), which are 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 (1), a rotating flange (54), a sliding flange (9), a fixed flange (65), a flange (58) and an oil cylinder (59) are sequentially sleeved on the bosses of the cylinder (1) from left to right, a base (60) is threadedly installed at the right end of the cylinder (1), the oil cylinder (59) is located at the middle part of the cylinder (1), a guide ring B (72) and a guide ring A (69) are arranged on the inner hole of the oil cylinder (59), a sealing ring I (73) is arranged on the inner hole of the oil cylinder (59) on the side of the guide ring A (69), the flange (58) is sleeved on the oil cylinder (59), the oil cylinder (59) and the outer part of the cylinder (1) are sleeved 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 on the rotating flange (54) in the axial direction, the three rollers (55) are fixed on the rotating flange (54) by roller pins (56), three springs (126) are uniformly arranged on the sliding flange (9), one end of each of the three springs (126) is fixedly installed with a guide head (125), the three guide heads (125) abut against the rotating flange (54), three roller blocks (127) are uniformly arranged on the sliding flange (9), the three rollers (55) and the corresponding roller blocks (127) form a roller block structure, and six tripping claws (11) are uniformly arranged on the sliding flange (9). Six small crank arms (57) are rotatably installed on the outer circular wall of the fixed flange (65) through pin shafts, the six small crank arms (57) are uniformly arranged in a ring shape, six large crank arms (12) are rotatably installed on the outer wall of the oil cylinder (59) through pin shafts, the six large crank arms (12) are uniformly arranged in a ring shape, one end of each of the six small crank arms (57) is rotatably connected to the middle part of the corresponding large crank arm (12) through a pin shaft, and one end of each of the six large crank arms (12) is fixedly provided with a locking roller (10), and the end of the small crank arm (57) fixed to the oil cylinder (59) is provided with a crank block (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), and small rollers (90) are arranged on the rotating flange (54).

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

3. A spring-hydraulic operating mechanism according to claim 2, characterized in that: The end surface of the cylinder (1) is fixedly provided with an oil pump (6), and the cylinder (1) is provided with an oil hole c (7) and a cylinder high-pressure cavity (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 (1), and a sealing ring C (53) is arranged between the valve body (13) and the cylinder (1). The crankshaft (17) is rotatably installed on the left side of the valve body (13), the motor (14) is fixedly installed on the valve body (13), the pinion (15) is fixedly installed on the output shaft end of the motor (14), the crankshaft (17) is fixedly installed on the valve body (13), the pinion (15) is engaged with the gear (16), the small valve sleeve (45) and the 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), the outer circular wall of the large valve sleeve (27) is provided with a sealing ring R (83), a sealing ring S (84) and a sealing ring T (85), and the outer circular wall of the small valve sleeve (45) is provided with a sealing ring Q (82).

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

7. A spring-hydraulic operating mechanism according to claim 2, characterized in that: The large valve sleeve (27) is internally provided with sleeve A (31), valve sleeve A (34) and valve seat A (36), which are sequentially attached, the sleeve A (31) is internally provided with connecting rod A (30), the valve sleeve A (34) is internally provided with valve rod A (47), the valve seat A (36) is internally provided with steel ball A (37) and spring A (38), the outer circular wall of the valve sleeve A (34) is provided with sealing ring U (115) and sealing ring W (117), the inner circular wall of the valve sleeve A (34) is provided with sealing ring V (116), the valve rod A (47) slides through the sealing ring V (116), the large valve sleeve (27) is further internally provided with sleeve B (33), valve sleeve B (35) and valve seat B (39), which are sequentially attached, the sleeve B (33) is internally provided with connecting rod B (32), the valve sleeve B (35) is internally provided with valve rod B (46), the valve seat B (39) is internally provided with steel ball B (41) and spring B (40), the outer circular wall of the valve sleeve B (35) is provided with sealing ring α (121), sealing ring Y (119) and sealing ring X (118), the inner circular wall of the valve sleeve B (35) is provided with sealing ring Z (120), the valve rod B (46) slides through the sealing ring Z (120).

8. A spring-hydraulic operating mechanism according to claim 6, characterized in that: The large valve sleeve (27) is internally provided with sleeve A (31), valve sleeve A (34) and valve seat A (36), which are sequentially attached, the sleeve A (31) is internally provided with connecting rod A (30), the valve sleeve A (34) is internally provided with valve rod A (47), the valve seat A (36) is internally provided with steel ball A (37) and spring A (38), the outer circular wall of the valve sleeve A (34) is provided with sealing ring U (115) and sealing ring W (117), the inner circular wall of the valve sleeve A (34) is provided with sealing ring V (116), the valve rod A (47) slides through the sealing ring V (116), the large valve sleeve (27) is further internally provided with sleeve B (33), valve sleeve B (35) and valve seat B (39), which are sequentially attached, the sleeve B (33) is internally provided with connecting rod B (32), the valve sleeve B (35) is internally provided with valve rod B (46), the valve seat B (39) is internally provided with steel ball B (41) and spring B (40), the outer circular wall of the valve sleeve B (35) is provided with sealing ring α (121), sealing ring Y (119) and sealing ring X (118), the inner circular wall of the valve sleeve B (35) is provided with sealing ring Z (120), the valve rod B (46) slides through the sealing ring Z (120).

9. A spring-hydraulic operating mechanism according to claim 8, characterized in that: The hydraulic system comprises a high-pressure cavity, an operating cavity and a low-pressure cavity, the high-pressure cavity is composed of a cylinder high-pressure cavity (91), a piston high-pressure cavity (95), a valve core high-pressure cavity (106), a pilot high-pressure cavity (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 arranged between the cylinder (1) and the oil cylinder (59), the cylinder high-pressure cavity (91) is a space surrounded by the cylinder (1), the oil cylinder (59), the sealing ring G (70) and the sealing ring H (71), the cylinder (1) is provided with a sealing ring F (68), a sealing ring J (74), a sealing ring K (75), a sealing ring L (76) and a sealing ring M (77), the piston high-pressure cavity (95) is a space surrounded 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) in the inner hole of the cylinder (1), the cylinder (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 cavity (106) is a space surrounded by the inner hole of the small valve sleeve (45), 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 (1) is provided with a sealing ring X (118) and a steel ball B (41), and the pilot high-pressure cavity (122) is a space surrounded by the large valve sleeve (27), 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 operation cavity is composed of a piston operation cavity (97), a spool operation cavity (107), a pilot operation cavity (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 operation cavity (97) is a space surrounded 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 (1). The spool (44) is installed with a sealing ring O (80) and a split valve port (86). The spool operation cavity (107) is a space surrounded by the spool (44), the sealing ring O (80), and the split valve port (86) in the large valve sleeve (27). The sealing ring O (80) is used to divide the spool operation cavity (107) into two parts and is communicated through the oil hole p (103) and the oil hole q (104). The pilot operation cavity (123) is a space surrounded by the sealing ring Y (119) and the sealing ring X (118) between the valve sleeve B (35) and the valve seat A (36) in the large valve sleeve (27) 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). The low-pressure cavity is composed of a valve body oil storage cavity (88), a pilot low-pressure cavity (124), an oil hole u (110), an oil hole v (111), an oil hole y (114), an oil hole x (113), and an oil hole r (105). The valve body oil storage cavity (88) is an internal cavity of the valve body (13), which is placed between the cover plate (21) and the cylinder (1) to store hydraulic oil and is sealed by the sealing ring A (51), the sealing ring B (52), and the sealing ring C (53). The pilot low-pressure cavity (124) is a cavity between the sealing ring Y (119) and the sealing ring α (121) on the inner valve sleeve B (35) and the sealing ring W (117) and the sealing ring U (115) on the valve sleeve A (34) in the large valve sleeve (27).

Images