A hydraulic protection device for crane and protection method thereof

Abstract

The invention relates to the technical field of crane protection, and discloses a hydraulic protection device for a crane and a protection method thereof, comprising a stop component, wherein the stop component comprises a shell. When a steel rope breaks after the device of the invention, the fixed pulley corresponding to the broken steel rope will lose the pulling force or gravity of the steel rope on it, and the fixed pulley will slide upward under the joint action of spring three and spring four, and the upward sliding of a fixed plate will drive a sealing shell to move upward together, and the upward movement of the sealing shell will drive a pressure rod two to move upward together through the fixed plate, and the upward movement of the pressure rod two will compress the air in the fixed sleeve three and push the air into an air guide hose, and the air guide hose will pass the air into the fixed shell, and the air passed into the fixed shell will push the limiting shaft corresponding to the undamaged steel rope to release the limiting effect on the sliding shaft two, and then the sliding shaft two will move upward and finally drive the rotating frame to rotate to lock the steel rope.

Description

Technical Field

[0001] The invention relates to the technical field of crane protection, and in particular to a hydraulic protection device for a crane and a protection method thereof. Background Art

[0002] A crane refers to a multi-action lifting machinery that vertically lifts and horizontally moves heavy objects within a certain range. With the rapid development of the industrial level, anti-cargo falling devices are being installed and used more and more on cranes. When the crane lifts the cargo, the cargo is protected to prevent it from falling.

[0003] Most anti-fall devices can only lock the steel rope when it breaks before the anti-fall device or when the winder is damaged. If the steel rope breaks after the locking component, the steel rope cannot be locked, which may cause the operator to make wrong operations in a panic and fail to effectively control the load. In response to the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a hydraulic protection device for a crane, including a stop assembly, the stop assembly includes a shell, the inner wall of the shell is slidably connected to a sliding shaft, the outer surface of the sliding shaft is rotatably connected to a rotating sleeve, and further includes:

[0005] A locking assembly, the locking assembly includes a traction rope slidably connected to the outer surface of the housing, the inner wall of the housing is slidably connected to a limit shaft, and the outer surface of the limit shaft is sleeved with a second spring;

[0006] The control component comprises a spring three fixedly connected to the inner wall of the shell, a fixing rod two is arranged inside the shell, and a spring four is sleeved on the outer surface of the fixing rod two.

[0007] Preferably, the outer surface of the rotating sleeve is fixedly connected to a fixed pulley, the outer surface of the rotating sleeve is fixedly connected to a turntable, the inner wall of the turntable is fixedly connected to a spring, there are three springs, the three springs are fixedly connected to a counterweight at one end away from each other, the outer surface of the counterweight is slidably connected to the inner wall of the turntable, the outer surface of the turntable is rotatably connected to a sealing shell, the back side of the sealing shell is slidably connected to the back side of the inner wall of the outer shell, and by providing the sealing shell, the turntable can be sealed, and the sealing shell will not rotate with the turntable.

[0008] Preferably, an air duct is fixedly connected to the outer surface of the sealing shell, and the air duct is fixedly connected to a fixed plate at one end away from the sealing shell, the back of the fixed plate is fixedly connected to the front of the sealing shell, the inner wall of the fixed plate is slidably connected to a fixed rod 1, the front of the fixed rod 1 is fixedly connected to a sliding frame, the inner wall of the sliding frame is rotatably connected to a sliding sleeve tooth, the inner wall of the sliding sleeve tooth is slidably connected to the outer surface of a rotating sleeve 1, and the outer surface of the rotating sleeve 1 has a recessed portion, which can limit the sliding sleeve tooth so that it can only slide on the rotating sleeve 1 but cannot rotate alone.

[0009] Preferably, the inner wall of the shell is rotatably connected with a rotating sleeve tooth, the inner wall of the rotating sleeve tooth is rotatably connected to the outer surface of the sliding shaft, the front side of the inner wall of the rotating sleeve tooth is fixedly connected with a threaded rod, the outer surface of the threaded rod is threadedly connected to a limiting sleeve, the outer surface of the limiting sleeve is slidably connected to the inner wall of the sliding shaft, a limiting groove is provided on the inner wall of the sliding shaft, a clamping block is fixedly connected to the outer surface of the limiting sleeve, both the sliding shaft and the inner walls of the rotating sleeve are provided with a sliding groove, the outer surface of the clamping block is slidably connected to the inner wall of the sliding groove, the outer surface of the rotating sleeve tooth contacts with a steel rope, and the limiting groove can be provided to limit the limiting sleeve.

[0010] Preferably, the back side of the limit sleeve is fixedly connected to the end of the traction rope close to the rotating sleeve tooth, the outer surface of the limit shaft is slidably connected to the sliding shaft 2, the traction rope is fixedly connected to the side of the limit shaft away from the sliding shaft 2 at the end away from the limit sleeve, the left and right sides of the spring 2 are fixedly connected to the inner wall of the outer shell, the outer surface of the sliding shaft 2 is slidably connected to the inner wall of the outer shell, the outer surface of the sliding shaft 2 is rotatably connected to a movable pulley, and the outer surface of the sliding shaft 2 is fixedly connected to a fixed frame, and by setting the limit shaft, the sliding shaft 2 can be limited.

[0011] Preferably, a pressure rod 1 is fixedly connected to the top of the fixed frame, and a support plate is slidably connected to the outer surface of the pressure rod 1, the back of the support plate is fixedly connected to the back of the inner wall of the shell, a fixed sleeve 1 is fixedly connected to the top of the support plate, the inner wall of the fixed sleeve 1 is slidably connected to the outer surface of the pressure rod 1, a liquid guide tube is fixedly connected to the top of the fixed sleeve 1, and the liquid guide tube is fixedly connected to a fixed sleeve 2 at the end away from the fixed sleeve 1, the top of the fixed sleeve 2 is fixedly connected to the inner wall of the shell, a rack is slidably connected to the inner wall of the fixed sleeve 2, the outer surface of the rack is slidably connected to the inner wall of the shell, a gear is meshedly connected to the back of the rack, and a rotating frame is fixedly connected to the inner wall of the gear, and the outer surface of the rotating frame is rotatably connected to the inner wall of the shell. By setting the rotating frame, the steel rope can be screwed and fixed when it rotates.

[0012] Preferably, the top of the second fixing rod is fixedly connected to the bottom of the sealing shell, the outer surface of the second fixing rod is slidably connected to the inner wall of the support plate, the bottom of the fourth spring is fixedly connected to the top of the support plate, the top of the fourth spring is fixedly connected to the bottom of the sealing shell, the back of the sealing shell is fixedly connected to a fixing plate, the top of the fixing plate is fixedly connected to a pressure rod two, the outer surface of the pressure rod two is slidably connected to a fixing sleeve three, the top of the fixing sleeve three is fixedly connected to an air guide hose, the air guide hose is fixedly connected to a fixed shell at the end away from the fixing sleeve three, the outer surface of the fixed shell is fixedly connected to the outer surface of the sliding shaft two, and the setting of the second fixing rod can limit the sealing shell.

[0013] A hydraulic protection device for a crane and a protection method thereof, comprising the following steps:

[0014] S1: When using this device, first install it at the designated position of the machine, then wind the steel rope around the fixed pulley and movable pulley inside the shell. When the winch fails or the steel rope breaks, the limit sleeve will move so that the fixed pulley cannot rotate;

[0015] S2: When the limit sleeve slides along the inner wall of the sliding shaft 1, the limit sleeve will release the restriction of the sliding shaft 2 by pulling the traction rope, thereby moving the pressure rod 1 upward, and finally driving the rotating frame to rotate and screw the steel rope to fix it;

[0016] S3: When a steel rope breaks after this device, the fixed pulley corresponding to the broken steel rope will move upward, thereby pushing the limit shaft to release the restriction on the sliding shaft 2, thereby moving the pressure rod 1 upward and rotating the rotating frame to screw and fix the steel rope.

[0017] The present invention has the following beneficial effects:

[0018] (1) In the present invention, when a steel rope breaks after the device, another steel rope will be supported alone. When the steel rope breaks, the fixed pulley corresponding to the broken steel rope will lose the pulling force or gravity of the steel rope, and the fixed pulley will slide upward under the joint action of spring three and spring four. When sliding upward, the limit sleeve will drive the limit shaft to move a certain distance through the traction rope. At the same time, the upward sliding of the fixed pulley will drive the sealing shell to move upward together. The upward movement of the sealing shell will drive the pressure rod two to move upward together through the fixed plate. The upward movement of the pressure rod two will compress the air in the fixed sleeve three and push the air into the air guide hose. The air guide hose will pass the air into the fixed shell. The air introduced into the fixed shell will push the limiting shaft corresponding to the undamaged steel rope, thereby releasing the limiting effect on the sliding shaft two. Then the sliding shaft two will move upward and finally drive the rotating frame to rotate to lock the steel rope. This design can lock the intact steel rope when one steel rope breaks, and then transfer the gravity borne by the steel rope part to this device, to prevent a sudden break of one steel rope from causing uneven force on the device, resulting in a sudden increase in the force on the rope or subsequent devices and overload stress. Locking the unbroken traction rope can also help the operator maintain relative control and safety after an accident, and prevent the operator from making incorrect operations after the rope breaks.

[0019] (2) In the present invention, when the winch fails or the steel rope breaks, the heavy object pulling the steel rope falls rapidly, causing the fixed pulley to rotate faster. The fixed pulley will drive the turntable to rotate through the rotating sleeve. Due to the centrifugal force, the counterweight block will have an outward force, which will drive the counterweight block to stretch the spring to push out the air in the turntable. The pushed out air will enter the air guide tube through the sealing shell. The air guide tube will pass the air into the fixed plate. The air passed into the fixed plate will push the fixed rod to the front, thereby driving the sliding frame to move to the front. The sliding frame will drive the sliding sleeve teeth to move to the front and finally mesh with the rotating sleeve teeth. At this time, the rotating sleeve can pass through the air guide tube. The sliding sleeve teeth drive the rotating sleeve teeth to rotate, and the rotating sleeve teeth drive the threaded rod to rotate. When the threaded rod rotates, it drives the limit sleeve to move forward. When the limit sleeve moves to the point where it can no longer move, the rotating sleeve teeth will be restricted by the limit sleeve and can no longer rotate. The rotating sleeve teeth will limit the fixed pulley through the sliding sleeve teeth and the rotating sleeve, so that it can no longer rotate. This design can prevent the fixed pulley from rotating when the winch fails or the steel rope breaks, and then the friction between the fixed pulley and the steel rope can apply a force to the steel rope to prevent it from continuing to slide, thereby reducing its tendency to continue sliding and reducing the locking pressure of the locking assembly.

[0020] (3) The movement of the limit sleeve toward the front of the present invention will also drive the clamping block to move together. After the limit sleeve moves to the final position, the front side of the clamping block will contact the back side of the sliding sleeve teeth, and the threaded rod will limit the limit sleeve so that the clamping block will limit the sliding sleeve teeth, thereby preventing the counterweight block from losing the effect of centrifugal force and resetting under the action of spring 1 when the rotating sleeve 1 cannot rotate, thereby resetting the sliding sleeve teeth and allowing the fixed pulley to continue to rotate. This design can prevent the sliding sleeve teeth from resetting when the rotating sleeve 1 cannot rotate through the limiting effect of the clamping block on the sliding sleeve teeth, so that the rotating sleeve 1 cannot rotate without human intervention.

[0021] (4) In the present invention, when the limit sleeve slides along the inner wall of the sliding shaft 1, the limit sleeve will pull the traction rope to move, and then pull the limit shaft through the traction rope and compress the spring 2 to release the limiting effect of the limit shaft on the sliding shaft 2. Due to the force applied by the steel rope, it will pull the movable pulley and the sliding shaft 2 to move upward together. During the upward movement of the sliding shaft 2, the pressure rod 1 will be driven to move upward through the fixed frame. During the upward movement of the pressure rod 1, it will squeeze the hydraulic oil in the fixed sleeve 1 to push the hydraulic oil into the liquid guide tube, and the liquid guide tube will push the hydraulic oil The hydraulic oil passed into the fixing sleeve 2 will push the rack upward, and drive the gear to rotate through the rack, thereby rotating the rotating frame. Since the steel rope passes through the rotating frame, the steel rope stop assembly is inside the rotating frame. When the rotating frame rotates, the steel rope will be twisted and fixed. The friction between the rotating frame and the steel rope will prevent the steel rope from sliding downward. This design can lock the steel rope when the winch fails or the steel rope breaks, thereby preventing the load from falling or moving suddenly, thereby reducing the danger to surrounding personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the internal cross-sectional structure of the housing of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the overall structure of the steel rope of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal cross-sectional structure of a sliding shaft of the present invention;

[0027] Figure 5 It is a schematic diagram of the internal cross-sectional structure of the turntable of the present invention;

[0028] Figure 6 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0029] Figure 7 This is a schematic diagram of the overall structure of the traction rope of the present invention;

[0030] Figure 8 It is a schematic diagram of the overall structure of the rotating frame of the present invention;

[0031] Fig. 9It is a schematic diagram of the overall structure of the fixing plate of the present invention;

[0032] Fig.10 This is a schematic diagram of the back structure of the housing of the present invention;

[0033] Fig.11 It is a schematic diagram of the working process of the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] In the figure: 1. Stop assembly; 101. Housing; 102. Sliding shaft 1; 103. Rotating sleeve 1; 104. Fixed pulley; 105. Turntable; 106. Spring 1; 107. Counterweight; 108. Sealing shell; 109. Air guide tube; 110. Fixed plate; 111. Fixed rod 1; 112. Sliding frame; 113. Sliding sleeve teeth; 114. Rotating sleeve teeth; 115. Threaded rod; 116. Limiting sleeve; 117. Limiting groove; 118. Clamping block; 119. Sliding groove; 120. Steel rope; 2. Locking assembly; 201. Pulling Guide rope; 202, limit axis; 203, spring two; 204, sliding axis two; 205, movable pulley; 206, fixed frame; 207, pressure rod one; 208, support plate; 209, fixed sleeve one; 210, liquid guide tube; 211, fixed sleeve two; 212, rack; 213, gear; 214, rotating frame; 3, control component; 301, spring three; 302, fixed rod two; 303, spring four; 304, fixed plate; 305, pressure rod two; 306, fixed sleeve three; 307, air guide hose; 308, fixed shell. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0037] For example, see Figure 1 - Figure 6 The present invention is a hydraulic protection device for a crane, comprising a stop assembly 1, the stop assembly 1 comprising a housing 101, a sliding shaft 102 is slidably connected to the inner wall of the housing 101, a rotating sleeve 103 is rotatably connected to the outer surface of the sliding shaft 102, and further comprising:

[0038] The locking assembly 2 includes a traction rope 201 slidably connected to the outer surface of the housing 101, a limit shaft 202 slidably connected to the inner wall of the housing 101, and a spring 203 is sleeved on the outer surface of the limit shaft 202;

[0039] The control component 3 includes a spring 301 fixedly connected to the inner wall of the housing 101, a fixing rod 2 302 is arranged inside the housing 101, and a spring 4 303 is sleeved on the outer surface of the fixing rod 2 302.

[0040] The outer surface of the rotating sleeve 103 is fixedly connected to the fixed pulley 104, the outer surface of the rotating sleeve 103 is fixedly connected to the rotating disk 105, the inner wall of the rotating disk 105 is fixedly connected to a spring 106, there are three springs 106, the three springs 106 are fixedly connected to a counterweight 107 at one end away from each other, the outer surface of the counterweight 107 is slidably connected to the inner wall of the rotating disk 105, the outer surface of the rotating disk 105 is rotatably connected to a sealing shell 108, the back of the sealing shell 108 is slidably connected to the back of the inner wall of the outer shell 101, when the winch fails or the steel rope 120 breaks, the heavy object traction steel rope 120 falls rapidly, so that the rotation speed of the fixed pulley 104 is accelerated, and the fixed pulley 104 will drive the rotating disk 105 to rotate through the rotating sleeve 103. Due to the action of centrifugal force, the counterweight 107 will have an outward force, which will drive the counterweight 107 to stretch the spring 106 and push the air in the rotating disk 105 out.

[0041] An air duct 109 is fixedly connected to the outer surface of the sealing shell 108, and a fixed disk 110 is fixedly connected to the air duct 109 at one end away from the sealing shell 108. The back of the fixed disk 110 is fixedly connected to the front of the sealing shell 108. A fixed rod 111 is slidably connected to the inner wall of the fixed disk 110, and a sliding frame 112 is fixedly connected to the front of the fixed rod 111. A sliding sleeve tooth 113 is rotatably connected to the inner wall of the sliding frame 112, and the inner wall of the sliding sleeve tooth 113 is slidably connected to the outer surface of the rotating sleeve 103. The pushed air will enter the air duct 109 through the sealing shell 108, and the air duct 109 will pass the air into the fixed disk 110. The air passed into the fixed disk 110 will push the fixed rod 111 toward the front, thereby driving the sliding frame 112 to move toward the front.

[0042] The inner wall of the housing 101 is rotatably connected with a rotating sleeve tooth 114, and the inner wall of the rotating sleeve tooth 114 is rotatably connected with the outer surface of the sliding shaft 102. The front of the inner wall of the rotating sleeve tooth 114 is fixedly connected with a threaded rod 115, and the outer surface of the threaded rod 115 is threadedly connected with a limiting sleeve 116, and the outer surface of the limiting sleeve 116 is slidably connected with the inner wall of the sliding shaft 102. A limiting groove 117 is provided on the inner wall of the sliding shaft 102, and a clamping block 118 is fixedly connected to the outer surface of the limiting sleeve 116. The inner walls of the sliding shaft 102 and the rotating sleeve 103 are both provided with a sliding groove 119, and the outer surface of the clamping block 118 is slidably connected with the inner wall of the sliding groove 119. The outer surface of the rotating sleeve tooth 114 contacts with the steel rope 120, and the sliding frame 112 drives the sliding sleeve tooth 113 to move toward the front and finally meshes with the rotating sleeve tooth 114. At this time, the rotating sleeve 103 can drive the rotating sleeve tooth 114 to rotate through the sliding sleeve tooth 113, and the rotating sleeve tooth 114 drives the threaded rod 115 to rotate. When the threaded rod 115 rotates, it drives the limiting sleeve 116 to move toward the front. When the limiting sleeve 116 moves to the point where it can no longer move, the rotating sleeve tooth 114 will be restricted by the limiting sleeve 116 and can no longer rotate. The rotating sleeve tooth 114 will engage with the rotating sleeve through the sliding sleeve tooth 113. A 103 limits the fixed pulley 104 so that it can no longer rotate. This design can prevent the fixed pulley 104 from rotating when the winch fails or the steel rope 120 breaks. Then, through the friction between the fixed pulley 104 and the steel rope 120, a force that hinders the steel rope 120 from continuing to slide can be applied to the steel rope 120, thereby reducing its tendency to continue to slide and reducing the locking pressure of the locking component 2. The movement of the limiting sleeve 116 to the front will also drive the clamping block 118 to move together. After the limiting sleeve 116 moves to the final position, the front side of the clamping block 118 will contact the back side of the sliding sleeve tooth 113 and through the threaded rod The limiting effect of 115 on the limiting sleeve 116 causes the clamping block 118 to limit the sliding sleeve teeth 113, thereby preventing the counterweight block 107 from losing the effect of centrifugal force and resetting under the action of spring 106 when the rotating sleeve 103 cannot rotate, thereby resetting the sliding sleeve teeth 113 and causing the fixed pulley 104 to continue to rotate. This design, through the limiting effect of the clamping block 118 on the sliding sleeve teeth 113, can prevent the sliding sleeve teeth 113 from resetting when the rotating sleeve 103 cannot rotate, so that the rotating sleeve 103 cannot rotate without manual intervention.

[0043] For example 2, please refer to Figure 7 - Fig.10The present invention is a hydraulic protection device for a crane. On the basis of the first embodiment, the back of the limiting sleeve 116 is fixedly connected to the end of the traction rope 201 close to the rotating sleeve tooth 114, the outer surface of the limiting shaft 202 is slidably connected with the sliding shaft 204, the traction rope 201 is fixedly connected to the side of the limiting shaft 202 away from the sliding shaft 204 at the end away from the limiting sleeve 116, the left and right sides of the spring 203 are fixedly connected to the inner wall of the shell 101, the outer surface of the sliding shaft 204 is slidably connected to the inner wall of the shell 101, and the sliding shaft The outer surface of the second 204 is rotatably connected to a movable pulley 205, and the outer surface of the sliding shaft 204 is fixedly connected to a fixing frame 206. In the present invention, when the limiting sleeve 116 slides along the inner wall of the sliding shaft 1 102, the limiting sleeve 116 will pull the traction rope 201 to move, and then pull the limiting shaft 202 through the traction rope 201 and compress the spring 203 to release the limiting effect of the limiting shaft 202 on the sliding shaft 204. Due to the force applied by the steel rope 120, it will pull the movable pulley 205 and the sliding shaft 204 to move upward together.

[0044] A pressure rod 207 is fixedly connected to the top of the fixed frame 206, and a support plate 208 is slidably connected to the outer surface of the pressure rod 207. The back of the support plate 208 is fixedly connected to the back of the inner wall of the shell 101. A fixed sleeve 209 is fixedly connected to the top of the support plate 208. The inner wall of the fixed sleeve 209 is slidably connected to the outer surface of the pressure rod 207. A liquid guide tube 210 is fixedly connected to the top of the fixed sleeve 209. The liquid guide tube 210 is fixedly connected to a fixed sleeve 211 at the end away from the fixed sleeve 209. The top of the fixed sleeve 211 is fixedly connected to the inner wall of the shell 101. A rack 212 is slidably connected to the inner wall of the fixed sleeve 211. The outer surface of the rack 212 is slidably connected to the inner wall of the shell 101. A gear 213 is meshed and connected to the back of the rack 212. A rotating frame 214 is fixedly connected to the inner wall of the shell 101. During the upward movement of the sliding shaft 204, The fixing frame 206 drives the pressure rod 1 207 to move upward. During the upward movement of the pressure rod 1 207, it squeezes the hydraulic oil in the fixing sleeve 1 209 to push the hydraulic oil into the liquid guide tube 210. The liquid guide tube 210 will pass the hydraulic oil into the fixing sleeve 211. The hydraulic oil passed into the fixing sleeve 211 will push the rack 212 upward, and drive the gear 213 to rotate through the rack 212, thereby rotating the rotating frame 214. Since the steel rope 120 passes through the rotating frame 214, the steel rope 120 is inside the rotating frame 214. When the rotating frame 214 rotates, the steel rope 120 is screwed and fixed. The friction between the rotating frame 214 and the steel rope 120 prevents the steel rope 120 from sliding downward. This design can lock the steel rope 120 when the winch fails or the steel rope 120 breaks, so as to avoid sudden drop or movement of the load, thereby reducing the danger to surrounding personnel and equipment.

[0045] The top of the second fixing rod 302 is fixedly connected to the bottom of the sealing shell 108, the outer surface of the second fixing rod 302 is slidably connected to the inner wall of the support plate 208, the bottom of the fourth spring 303 is fixedly connected to the top of the support plate 208, the top of the fourth spring 303 is fixedly connected to the bottom of the sealing shell 108, the back of the sealing shell 108 is fixedly connected to the fixing plate 304, the top of the fixing plate 304 is fixedly connected to the second pressure rod 305, the outer surface of the second pressure rod 305 is slidably connected to the third fixing sleeve 306, the top of the third fixing sleeve 306 is fixedly connected to the air guide hose 307, and the air guide hose 307 is away from the third fixing sleeve 306. One end of 06 is fixedly connected with a fixed shell 308, and the outer surface of the fixed shell 308 is fixedly connected with the outer surface of the sliding shaft 204. When a steel rope 120 breaks after the device of the present invention, another steel rope 120 will be supported alone. When the steel rope 120 breaks, the fixed pulley 104 corresponding to the broken steel rope 120 will lose the pulling force or gravity of the steel rope 120, and the fixed pulley 104 will slide upward under the joint action of the spring three 301 and the spring four 303. When sliding upward, the limit sleeve 116 will drive the limit shaft 202 to move through the traction rope 201. When the fixed pulley 104 moves a certain distance, the sealing shell 108 moves upwards together with the sliding of the fixed pulley 104. The sealing shell 108 moves upwards together with the sliding of the pressure rod 2 305 through the fixing plate 304. The pressure rod 2 305 moves upwards together with the sliding of the pressure rod 2 305. The air in the fixing sleeve 306 is compressed and pushed into the air guide hose 307. The air guide hose 307 passes the air into the fixing shell 308. The air passed into the fixing shell 308 pushes the limiting shaft 202 corresponding to the undamaged steel rope 120 to release the limiting effect on the sliding shaft 204. Then the sliding shaft 204 is pushed upwards. The second 204 will move upward and eventually drive the rotating frame 214 to rotate to lock the steel rope 120. This design can lock the intact steel rope 120 when one steel rope 120 breaks, thereby transferring the gravity borne by part of the steel rope 120 to this device, preventing a sudden breakage of one steel rope 120 from causing uneven force on the device, resulting in a sudden increase in force on the rope or subsequent devices and overload stress. Locking the unbroken traction rope can also help the operator maintain relative control and safety after an accident occurs, preventing the operator from making incorrect operations after the rope breaks.

[0046] The protection method of the hydraulic protection device for the crane includes the following steps:

[0047] S1: When using the device, first install the device at a designated position of the machine, then wind the steel rope 120 around the fixed pulley 104 and the movable pulley 205 inside the housing 101. When the winch fails or the steel rope 120 breaks, the limit sleeve 116 will move to prevent the fixed pulley 104 from rotating.

[0048] S2: When the limiting sleeve 116 slides along the inner wall of the sliding shaft 102, the limiting sleeve 116 releases the restriction of the sliding shaft 204 by pulling the traction rope 201, thereby moving the pressure rod 1 207 upward, and finally driving the rotating frame 214 to rotate, thereby screwing and fixing the steel rope 120;

[0049] S3: When a steel rope 120 breaks after this device, the fixed pulley 104 corresponding to the broken steel rope 120 will move upward, thereby pushing the limiting shaft 202 to release the restriction on the sliding shaft 204, thereby moving the pressure rod 1 207 upward and rotating the rotating frame 214 to screw and fix the steel rope 120.

[0050] A specific application of this embodiment is:

[0051] When using the device, first install the device at a designated position of the crane, then wind the steel rope 120 around the fixed pulley 104 and the movable pulley 205 inside the housing 101, then start the winch on the crane, and use the steel rope 120 to pull the heavy object up. When the winch fails or the steel rope 120 breaks, the heavy object pulls the steel rope 120 and falls quickly, causing the fixed pulley 104 to fall. The rotation speed of the fixed pulley 104 is accelerated, and the rotating disk 105 is driven to rotate through the rotating sleeve 103. Due to the effect of centrifugal force, the counterweight block 107 has an outward force, which drives the counterweight block 107 to stretch the spring 106 and push the air in the rotating disk 105 out. The pushed air enters the air guide pipe 109 through the sealing shell 108. The air guide pipe 109 passes the air into the fixed disk 110. The air passed into the fixed disk 110 pushes the fixed rod 111 toward the front, thereby driving the sliding frame 112 to move toward the front. The sliding frame 112 drives the sliding The movable sleeve tooth 113 moves toward the front and finally meshes with the rotating sleeve tooth 114. At this time, the rotating sleeve 103 can drive the rotating sleeve tooth 114 to rotate through the sliding sleeve tooth 113. The rotating sleeve tooth 114 will drive the threaded rod 115 to rotate. When the threaded rod 115 rotates, it will drive the limiting sleeve 116 to move toward the front. When the limiting sleeve 116 moves to the point where it can no longer move, the rotating sleeve tooth 114 will be restricted by the limiting sleeve 116 and can no longer rotate. The rotating sleeve tooth 114 will limit the fixed pulley 104 through the sliding sleeve tooth 113 and the rotating sleeve 103, so that it can no longer Continue to rotate. This design can prevent the fixed pulley 104 from rotating when the winch fails or the steel rope 120 breaks, and then a force that hinders the steel rope 120 from continuing to slide can be applied to the steel rope 120 through the friction between the fixed pulley 104 and the steel rope 120, thereby reducing its tendency to continue to slide and reducing the locking pressure of the locking component 2; in the above process, the movement of the limit sleeve 116 to the front will also drive the clamping block 118 to move together. After the limit sleeve 116 moves to the final position, the front side of the clamping block 118 will contact the back side of the sliding sleeve tooth 113, and the limit sleeve will be locked through the threaded rod 115. The limiting effect of 116 enables the clamping block 118 to limit the sliding sleeve teeth 113, thereby preventing the counterweight block 107 from losing the effect of centrifugal force and resetting under the effect of spring 106 when the rotating sleeve 103 cannot rotate, thereby resetting the sliding sleeve teeth 113, so that the fixed pulley 104 can continue to rotate. This design can prevent the sliding sleeve teeth 113 from resetting when the rotating sleeve 103 cannot rotate through the limiting effect of the clamping block 118 on the sliding sleeve teeth 113, so that the rotating sleeve 103 cannot rotate without manual intervention;

[0052] When the limiting sleeve 116 slides along the inner wall of the sliding shaft 102, the limiting sleeve 116 will pull the traction rope 201 to move, and then pull the limiting shaft 202 through the traction rope 201 and compress the spring 203 to release the limiting effect of the limiting shaft 202 on the sliding shaft 204. Due to the force applied by the steel rope 120, it will pull the movable pulley 205 and the sliding shaft 204 to move upward together. During the upward movement of the sliding shaft 204, the pressure rod 1 207 will be driven to move upward through the fixed frame 206. During the upward movement of the pressure rod 1 207, it will squeeze the hydraulic oil in the fixed sleeve 1 209 to push the hydraulic oil into the liquid guide tube 210, and the liquid guide tube 210 will push the liquid The hydraulic oil is passed into the second fixing sleeve 211. The hydraulic oil passed into the second fixing sleeve 211 will push the rack 212 upwards, and drive the gear 213 to rotate through the rack 212, thereby rotating the rotating frame 214. Since the steel rope 120 passes through the rotating frame 214, the steel rope 120 is inside the rotating frame 214. When the rotating frame 214 rotates, the steel rope 120 is screwed and fixed. The friction between the rotating frame 214 and the steel rope 120 prevents the steel rope 120 from sliding downward. This design can lock the steel rope 120 when the winch fails or the steel rope 120 breaks, which can prevent the load from falling or moving suddenly, thereby reducing the danger to surrounding personnel and equipment.

[0053] When a steel rope 120 breaks after this device, the other steel rope 120 will support alone. When the steel rope 120 breaks, the fixed pulley 104 corresponding to the broken steel rope 120 will lose the pulling force or gravity of the steel rope 120, and the fixed pulley 104 will slide upward under the joint action of the spring three 301 and the spring four 303. When sliding upward, the limit sleeve 116 will drive the limit shaft 202 to move a certain distance through the traction rope 201. At the same time, the upward sliding of the fixed pulley 104 will drive the sealing shell 108 to move upward together. The upward movement of the sealing shell 108 will drive the pressure rod two 305 to move upward together through the fixed plate 304. The upward movement of the pressure rod two 305 will compress the air in the fixed sleeve three 306 and push the air into the air guide hose 307. The air guide hose 307 will pass the air into the fixed shell 308. The air in the air will push the limiting shaft 202 corresponding to the undamaged steel rope 120, so that it releases the limiting effect on the sliding shaft 204, and then the sliding shaft 204 will move upward and finally drive the rotating frame 214 to rotate to lock the steel rope 120. This design can lock the intact steel rope 120 when one steel rope 120 breaks, and then transfer the gravity borne by part of the steel rope 120 to this device, to prevent a sudden break of one steel rope 120 from causing uneven force on the device, resulting in a sudden increase in the force on the rope or subsequent devices and overload stress, and locking the unbroken traction rope can also help the operator maintain relative control and safety after an accident occurs, and prevent the operator from performing incorrect operations after the rope breaks; after the fault of this device is repaired, all components can be manually reset by the staff so that the device can be used again.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hydraulic protection device for a crane, comprising a stop assembly (1), the stop assembly (1) comprising a housing (101), the inner wall of the housing (101) being slidably connected to a sliding shaft (102), the outer surface of the sliding shaft (102) being rotatably connected to a rotating sleeve (103), characterized in that: Also includes: A locking assembly (2), the locking assembly (2) comprising a traction rope (201) slidably connected to the outer surface of the housing (101), a limit shaft (202) slidably connected to the inner wall of the housing (101), and a second spring (203) sleeved on the outer surface of the limit shaft (202); A control component (3), the control component (3) comprising a spring three (301) fixedly connected to the inner wall of the housing (101), a fixing rod two (302) being arranged inside the housing (101), and a spring four (303) being sleeved on the outer surface of the fixing rod two (302); The outer surface of the rotating sleeve (103) is fixedly connected to a fixed pulley (104), the outer surface of the rotating sleeve (103) is fixedly connected to a rotating disk (105), the inner wall of the rotating disk (105) is fixedly connected to a spring (106), there are three springs (106), the three springs (106) are fixedly connected to a counterweight (107) at one end away from each other, the outer surface of the counterweight (107) is slidably connected to the inner wall of the rotating disk (105), the outer surface of the rotating disk (105) is rotatably connected to a sealing shell (108), and the back surface of the sealing shell (108) is slidably connected to the back surface of the inner wall of the outer shell (101); The outer surface of the sealing shell (108) is fixedly connected to an air guide tube (109); the air guide tube (109) is fixedly connected to a fixed plate (110) at one end away from the sealing shell (108); the back of the fixed plate (110) is fixedly connected to the front of the sealing shell (108); the inner wall of the fixed plate (110) is slidably connected to a fixed rod 1 (111); the front of the fixed rod 1 (111) is fixedly connected to a sliding frame (112); the inner wall of the sliding frame (112) is rotatably connected to a sliding sleeve tooth (113); the inner wall of the sliding sleeve tooth (113) is slidably connected to the outer surface of the rotating sleeve 1 (103); The inner wall of the housing (101) is rotatably connected to a rotating sleeve tooth (114), the inner wall of the rotating sleeve tooth (114) is rotatably connected to the outer surface of the sliding shaft (102), the front face of the inner wall of the rotating sleeve tooth (114) is fixedly connected to a threaded rod (115), the outer surface of the threaded rod (115) is threadedly connected to a limiting sleeve (116), the outer surface of the limiting sleeve (116) is slidably connected to the inner wall of the sliding shaft (102), the inner wall of the sliding shaft (102) is provided with a limiting groove (117), the outer surface of the limiting sleeve (116) is fixedly connected to a clamping block (118), the inner walls of the sliding shaft (102) and the rotating sleeve (103) are both provided with a sliding groove (119), the outer surface of the clamping block (118) is slidably connected to the inner wall of the sliding groove (119), and the outer surface of the rotating sleeve tooth (114) contacts a steel rope (120); The back side of the limiting sleeve (116) is fixedly connected to an end of the traction rope (201) close to the rotating sleeve tooth (114); the outer surface of the limiting shaft (202) is slidably connected to the second sliding shaft (204); the end of the traction rope (201) away from the limiting sleeve (116) is fixedly connected to a side of the limiting shaft (202) away from the second sliding shaft (204); the left and right sides of the second spring (203) are fixedly connected to the inner wall of the outer shell (101); the outer surface of the second sliding shaft (204) is slidably connected to the inner wall of the outer shell (101); the outer surface of the second sliding shaft (204) is rotatably connected to a movable pulley (205); and the outer surface of the second sliding shaft (204) is fixedly connected to a fixing frame (206); The top of the fixed frame (206) is fixedly connected to a pressure rod 1 (207), the outer surface of the pressure rod 1 (207) is slidably connected to a support plate (208), the back of the support plate (208) is fixedly connected to the back of the inner wall of the housing (101), the top of the support plate (208) is fixedly connected to a fixed sleeve 1 (209), the inner wall of the fixed sleeve 1 (209) is slidably connected to the outer surface of the pressure rod 1 (207), the top of the fixed sleeve 1 (209) is fixedly connected to a liquid guide tube (210), and the liquid guide tube (210) is located away from the fixed sleeve. One end of the first (209) is fixedly connected to a second fixing sleeve (211), the top of the second fixing sleeve (211) is fixedly connected to the inner wall of the outer shell (101), the inner wall of the second fixing sleeve (211) is slidably connected to a rack (212), the outer surface of the rack (212) is slidably connected to the inner wall of the outer shell (101), the back of the rack (212) is meshingly connected to a gear (213), the inner wall of the gear (213) is fixedly connected to a rotating frame (214), and the outer surface of the rotating frame (214) is rotatably connected to the inner wall of the outer shell (101); The top of the second fixing rod (302) is fixedly connected to the bottom of the sealing shell (108), the outer surface of the second fixing rod (302) is slidably connected to the inner wall of the support plate (208), the bottom of the fourth spring (303) is fixedly connected to the top of the support plate (208), the top of the fourth spring (303) is fixedly connected to the bottom of the sealing shell (108), the back of the sealing shell (108) is fixedly connected to a fixing plate (304), the top of the fixing plate (304) is fixedly connected to a pressure rod (305), the outer surface of the pressure rod (305) is slidably connected to a fixing sleeve (306), the top of the fixing sleeve (306) is fixedly connected to an air guide hose (307), the air guide hose (307) is fixedly connected to a fixing shell (308) at one end away from the fixing sleeve (306), and the outer surface of the fixing shell (308) is fixedly connected to the outer surface of the second sliding shaft (204).

2. The hydraulic protection device for crane according to claim 1, characterized in that: The protection method of the protection device comprises the following steps: S1: When using the device, the device is first installed at a designated position of the machine, and then the steel rope (120) is wound around the fixed pulley (104) and the movable pulley (205) inside the housing (101). When the winch fails or the steel rope (120) breaks, the limit sleeve (116) moves so that the fixed pulley (104) cannot rotate; S2: When the limiting sleeve (116) slides along the inner wall of the sliding shaft (102), the limiting sleeve (116) releases the restriction of the sliding shaft (204) by pulling the traction rope (201), thereby causing the pressure rod (207) to move upward, and finally driving the rotating frame (214) to rotate, thereby screwing and fixing the steel rope (120); S3: When one of the steel ropes (120) breaks, the fixed pulley (104) corresponding to the broken steel rope (120) moves upward, thereby pushing the limit shaft (202) to release the restriction on the sliding shaft (204), thereby causing the pressure rod (207) to move upward and the rotating frame (214) to rotate, thereby screwing and fixing the steel rope (120).

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