Hydraulic damping device for overspeed protection of belt conveyor

Abstract

The invention provides a hydraulic damping device for overspeed protection of a belt conveyor. A hydraulic damping device for overspeed protection of a belt conveyor comprises two bottom beams, two upper beams are arranged above the two bottom beams respectively, the same groove-shaped frame is fixedly installed between the two upper beams, two oil cylinder seats are fixedly installed on the tops of the two bottom beams respectively, the four oil cylinder seats are distributed in a rectangular array, and the two oil cylinder seats are fixedly installed on the bottom beams. And oil cylinders are installed in the four oil cylinder bases, the output ends of the four oil cylinders are fixedly connected with the bottoms of the corresponding upper beams, and three damping plates are fixedly installed in the groove-shaped frame. The hydraulic damping device for overspeed protection of the belt conveyor has the advantages that the damping effect is good, action is stable, the damping plate can be reliably cooled in the damping action process, and the service life of the damping plate can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of damping devices, and particularly relates to a hydraulic damping device for overspeed protection of a belt conveyor. Background Art

[0002] A belt conveyor is a mechanical device that conveys materials continuously by frictional drive. It can convey both bulk materials and finished goods, and is widely used in industries such as docks, coal mines, metallurgy, grain, and papermaking.

[0003] During the downward transportation of materials on a belt conveyor, due to the downward sliding force generated by the gravity of the materials on the conveyor belt, the speed of the conveyor belt becomes faster and faster. During the braking process, the phenomenon of "rolling materials" will occur to the materials. During the downward transportation of materials, the downward sliding force generated together with the conveyor belt is much greater than the frictional force of the roller, resulting in the phenomenon of "slipping". In addition, due to reasons such as heavy-load starting, overloading, power failure, wear and degumming of the rubber-covered roller, and high water content in the roadway or raw coal, the phenomenon of "runaway" is also likely to occur. The above phenomena will all cause the conveyor belt speed to increase, seriously affecting the transportation efficiency of materials, and at the same time posing potential production safety hazards. In the prior art, there is a lack of a device that can effectively brake the conveyor belt of a belt conveyor when the above phenomena occur.

[0004] Therefore, it is necessary to provide a hydraulic damping device for overspeed protection of a belt conveyor to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a hydraulic damping device for overspeed protection of a belt conveyor, which has good damping effect, smooth operation, can reliably cool the damping plate during the damping action, and is beneficial to improving the service life of the damping plate.

[0006] To solve the above technical problems, the hydraulic damping device for overspeed protection of a belt conveyor provided by the present invention includes: two bottom beams, two upper beams are respectively arranged above the two bottom beams, a same trough-shaped frame is fixedly installed between the two upper beams, two oil cylinder seats are fixedly installed at the top of each of the two bottom beams, the four oil cylinder seats are distributed in a rectangular array, oil cylinders are installed in the four oil cylinder seats, the output ends of the four oil cylinders are fixedly connected to the bottom of the corresponding upper beam, and three damping plates are fixedly installed in the trough-shaped frame.

[0007] Preferably, the damping plate is made of rubber.

[0008] Preferably, a trough-shaped hanger is fixedly installed at the bottom of the trough-shaped frame. A main air duct is fixedly installed inside the trough-shaped hanger. A plurality of branch air ducts are fixedly installed on both sides of the main air duct. A plurality of exhaust holes are formed in the branch air ducts. An air pump is fixedly installed on one of the bottom beams. An air outlet pipe is fixedly installed on the air outlet of the air pump. A fixed sleeve is slidably and sealingly sleeved at one end of the air outlet pipe away from the air pump. A connecting air duct is fixedly installed at the top end of the fixed sleeve. The top end of the connecting air duct is fixedly connected to the main air duct. A same follow-up trigger mechanism is installed on the fixed sleeve and the corresponding bottom beam. A protective box is fixedly installed on the top of the corresponding bottom beam. The follow-up trigger mechanism is located inside the protective box.

[0009] Preferably, a fixing ring is fixedly sleeved on the outer wall of the fixed sleeve. A lifting arm is fixedly installed on the outer wall of the fixing ring. The top of the lifting arm is fixedly connected to the bottom of the corresponding upper beam.

[0010] Preferably, the follow-up trigger mechanism includes a Z-shaped plate, a lower conductive block, an L-shaped plate, a lifting slide rod, a limiting end plate, an upper conductive block and a spring. The Z-shaped plate is fixedly installed on the outer wall of the fixed sleeve. A lower insulating plate is fixedly installed on the Z-shaped plate. The lower conductive block is fixedly installed on the top of the lower insulating plate. The L-shaped plate is fixedly installed on the top of the corresponding bottom beam. The lifting slide rod penetrates through and is slidably installed on the L-shaped plate. An upper insulating plate is fixedly installed at the bottom end of the lifting slide rod. The upper conductive block is fixedly installed on the bottom of the upper insulating plate. The spring is sleeved on the lifting slide rod. The top end of the spring is fixedly connected to the L-shaped plate, and the bottom end is fixedly connected to the lower insulating plate. The limiting end plate is fixedly installed at the top end of the lifting slide rod.

[0011] Preferably, a maintenance opening is formed in the protective box. A maintenance plug board is slidably installed in the maintenance opening. A handle is fixedly installed on the top of the maintenance plug board.

[0012] Preferably, a main water pipe is further arranged inside the trough-shaped frame. A plurality of branch water pipes are fixedly installed on both sides of the main water pipe. A plurality of atomizing heads are fixedly installed on the plurality of branch water pipes. A diaphragm pump is fixedly installed on the corresponding bottom beam. A water outlet pipe is fixedly installed on the water outlet of the diaphragm pump. A corrugated pipe is fixedly installed at the top end of the water outlet pipe. A connecting water pipe penetrates through and is fixedly installed on the lifting arm. The top end of the connecting water pipe is fixedly connected to the main water pipe, and the bottom end is fixedly connected to the top end of the corrugated pipe.

[0013] Preferably, a water receiving trough located below the trough-shaped hanger is fixedly installed at the bottom of the trough-shaped frame. An L-shaped drain pipe is fixedly installed at the bottom of the water receiving trough. A drain hose is fixedly installed at the bottom end of the L-shaped drain pipe.

[0014] Preferably, a suspension plate is fixedly sleeved on the connecting water pipe, and the suspension plate is fixedly connected to the corresponding upper beam.

[0015] Preferably, two insertion cylinders are fixedly installed on the top of the protective box. Insertion rods are slidably installed in both of the two insertion cylinders, and the tops of the two insertion rods are fixedly installed with the same triangular baffle.

[0016] Compared with the related art, the hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention has the following beneficial effects: The hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention mainly consists of two bottom beams, four oil cylinder seats, four oil cylinders, two upper beams, a trough-shaped frame and three damping plates. When in use, it is controlled by the main control of the belt conveyor, and whether the belt speed of the belt conveyor is overspeed is used as the basis for whether "runaway", "skidding" and "rolling materials" occur. When the conveyor belt is overspeed, the main control issues an action signal for the hydraulic damping device for the overspeed protection of the belt conveyor. Driven by the oil cylinder, it drives the two upper beams and the trough-shaped frame to rise, so that the damping plate quickly and reliably approaches the conveyor belt. The damping plate rubs against the lower surface of the belt, and relies on the strong frictional braking force to implement damping braking on the sliding conveyor belt after the vehicle slides. The sliding conveyor belt is reliably translated to reduce the belt speed, thereby adjusting the motor working state of the belt conveyor and implementing effective damping braking. When multiple hydraulic damping devices for the overspeed protection of the belt conveyor participate in the overspeed protection of the belt conveyor, the number and fitting degree of the hydraulic damping devices for the overspeed protection of the belt conveyor participating in the damping can also be adjusted in a timely manner according to the actual working conditions, so that the conveyor operates controllably and reliably, and the whole has the advantages of stable action, good damping effect, not easy to misoperate, and flexible and reliable use; Through the setting of the main air pipe, multiple branch air pipes, connecting air pipes, fixed sleeves, air outlet pipes, air pumps and the follow-up triggering mechanism, the hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention can automatically trigger the operation of the air pump when the device performs damping action, so as to compress the external air and send it into the main air pipe. The compressed air finally blows towards the trough-shaped frame and the corresponding damping plate through the exhaust holes on the multiple branch air pipes, which can effectively increase the air flow speed in the bottom area of the damping plate, thereby being able to accelerate the heat dissipation speed of the damping plate and avoid problems such as combustion, excessive oxidation and aging of the damping plate due to too high temperature, which is beneficial to improving the service life of the damping plate; The hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention, through the settings of the main water pipe, multiple branch water pipes, multiple atomizing heads, connecting water pipes, outlet water pipes, bellows, diaphragm pumps and other components, can automatically trigger the operation of the diaphragm pump when the device performs damping action, pump 30% of the external alcohol into the main water pipe, and the alcohol is finally atomized and ejected through the atomizing heads on the branch water pipes under the action of water pressure, sprayed towards the bottom of the trough-shaped frame and the damping plate, so that the damping plate can be cooled. Cooperating with the high-speed air flow discharged from the exhaust holes, the alcohol can be volatilized faster, further improving the cooling effect on the damping plate and further increasing the service life of the damping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic structural diagram of the first embodiment of the hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention; Figure 2 For Figure 1 FIG. 7 is a schematic structural diagram of the hydraulic damping device for the overspeed protection of the belt conveyor shown from another perspective; Figure 3 For Figure 1 FIG. 8 is a front view of the hydraulic damping device for the overspeed protection of the belt conveyor shown; Figure 4 For Figure 2 FIG. 9 is a schematic structural diagram of the trough-shaped frame shown; Figure 5 FIG. 10 is a schematic structural diagram of the second embodiment of the hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention; Figure 6 For Figure 5 FIG. 11 is a front view of the hydraulic damping device for the overspeed protection of the belt conveyor shown; Figure 7 For Figure 5 FIG. 12 is a schematic distribution diagram of multiple branch air ducts located in the trough-shaped hanger shown; Figure 8 For Figure 5 FIG. 13 is a schematic diagram of a partial structure shown; Figure 9 For Figure 8 FIG. 14 is a schematic structural diagram of the follow-up trigger mechanism located in the protective box shown; Figure 10 For Figure 8 FIG. 15 is a schematic structural diagram of the protective box and the maintenance plug board in a separated state shown; Figure 11 FIG. 16 is a schematic structural diagram of the third embodiment of the hydraulic damping device for the overspeed protection of the belt conveyor provided by the present invention; Figure 12 For Figure 11 FIG. 17 is a schematic distribution diagram of multiple branch water pipes located in the trough-shaped hanger shown; Figure 13 is Figure 12 an enlarged schematic view of part A shown in the figure; Figure 14 is Figure 12 a front view of components such as a water receiving tank and a trough-shaped hanger shown in the figure; Figure 15 is Figure 11 a schematic structural view of the protective box and the triangular baffle in a separated state shown in the figure.

[0018] Reference numerals in the figure: 1, bottom beam; 2, oil cylinder seat; 3, oil cylinder; 4, upper beam; 5, trough-shaped frame; 6, damping plate; 7, trough-shaped hanger; 8, main air duct; 9, branch air duct; 10, connecting air duct; 11, fixed sleeve; 12, boom; 13, air outlet duct; 14, air pump; 15, protective box; 16, Z-shaped plate; 17, lower conductive block; 18, L-shaped plate; 19, lifting slide bar; 20, limit end plate; 21, upper conductive block; 22, spring; 23, main water pipe; 24, branch water pipe; 25, atomizing head; 26, connecting water pipe; 27, water outlet pipe; 28, corrugated pipe; 29, diaphragm pump; 30, triangular baffle; 31, water receiving tank; 151, maintenance plug; 901, exhaust hole. Specific embodiments

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The first embodiment Please refer to Figures 1 - 4 , in the first embodiment of the present invention, the hydraulic damping device for the overspeed protection of the belt conveyor includes: two bottom beams 1, two upper beams 4 are respectively arranged above the two bottom beams 1, and the same trough-shaped frame 5 is fixedly installed between the two upper beams 4. Two oil cylinder seats 2 are fixedly installed at the top of the two bottom beams 1, and the four oil cylinder seats 2 are distributed in a rectangular array. Oil cylinders 3 are installed in the four oil cylinder seats 2, and the output ends of the four oil cylinders 3 are fixedly connected to the bottom of the corresponding upper beam 4. Three damping plates 6 are fixedly installed in the trough-shaped frame 5. The trough-shaped frame 5 is made into a shape consistent with the cross-section of the standard trough-shaped idler, and is formed by horizontally connecting and welding four sections of bent channel steel. The height of the channel steel frame is adjustable up and down, and is generally 5-10 mm lower than the upper surface of the standard idler group.

[0021] The bottom beam 1 is connected to the side of the frame of the standard belt conveyor by bolts. The oil cylinder seat 2 is made of seamless pipe and is distributed at the four corners. The oil cylinder 3 is placed in the oil cylinder seat 2 to form both guiding and up-and-down translation.

[0022] In this embodiment, the damping plate 6 is made of rubber material. More specifically, it is made of chloroprene rubber, which has good damping performance and wear resistance, and has good high-temperature resistance.

[0023] In this embodiment: When in use, the hydraulic damping device for overspeed protection of belt conveyor is controlled by the main control of belt conveyor. The speed detection module detects the belt speed parameters of the conveyor belt. Whether the belt speed increases to overspeed is used as the basis for whether "flying", "slipping" and "rolling" occur. The acquired parameters are then used to identify the current status of the conveyor through the centralized control PLC program. The main control of the conveyor collects the instantaneous belt speed. When the conveyor belt overspeeds, the main control immediately sends out the action signal of the hydraulic damping device for overspeed protection of the belt conveyor to ensure that there will be no malfunction. The whole process is fast, stable, reliable and safe, and will not cause secondary damage to the conveyor belt.

[0024] The hydraulic damper is arranged on the middle frame of the conveyor load-bearing section and arranged at intervals, and the friction between it and the lower surface of the conveyor belt is used to overcome the downward force generated by the conveyed material. Since there is relative sliding friction between the damping plate 6 and the lower surface of the conveyor belt, its friction coefficient is much larger than the conveyor operation and roller resistance coefficient. Therefore, appropriately adjusting the number of damping plates involved in the damping of the hydraulic damping device for belt conveyor overspeed protection and the pressure of contact with the conveyor belt is equivalent to adjusting the effective length of the damping plate 6 in contact with the conveyor belt, so that the running resistance of the conveyor belt can be greater than the downward force generated by the special material, and the drive motor can be kept working in the electric state, ensuring the rationality of the layout of the drive device of the lower belt conveyor and the safety of braking.

[0025] Under normal operating conditions, the damping plate 6 does not contact the conveyor belt and does not affect the normal operation of the belt conveyor. When an overspeed fault occurs in the belt conveyor, the conveyor belt centralized control sends a damping action operation signal. Driven by the cylinder 3, the two upper beams 4 and the trough frame 5 are driven to rise, so that the damping plate is quickly and reliably close to the conveyor belt, thereby effectively implementing damping braking. The damping plate 6 is tightly attached to the lower surface of the load-bearing conveyor belt under the lifting action of the cylinder 3, so as to increase the damping force. The damping plates 6 on both sides first contact the bottom of the conveyor belt. As the cylinder 3 continues to lift, the damping plate 6 in the middle will also contact the bottom of the conveyor belt, and the damping gradually increases. By controlling the lifting distance of the cylinder 3, the damping size can be adjusted. The cylinder 3 is used to control the lifting and lowering of the damping plate 6, with smooth movement, large thrust, and good damping effect. The damping plate 6 causes little damage to the conveyor belt and the mechanical joints of the conveyor belt, and is easy to replace with low maintenance costs.

[0026] Compared with the related art, the hydraulic damping device for overspeed protection of belt conveyor provided by the present invention has the following beneficial effects: The present invention provides a hydraulic damping device for the overspeed protection of a belt conveyor, which mainly consists of two bottom beams 1, four cylinder seats 2, four cylinders 3, two upper beams 4, a trough-shaped frame 5 and three damping plates 6. When in use, it is controlled by the main control of the belt conveyor, and whether the belt speed of the belt conveyor is overspeed is used as the basis for whether "runaway", "skidding" and "rolling materials" occur. When the conveyor belt is overspeed, the main control issues an action signal for the hydraulic damping device for the overspeed protection of the belt conveyor. Driven by the cylinder 3, the two upper beams 4 and the trough-shaped frame 5 are driven to rise, so that the damping plate 6 quickly and reliably approaches the conveyor belt. The lower surface of the belt is rubbed by the damping plate 6, and a powerful frictional braking force is relied on to implement damping braking on the sliding conveyor belt after the vehicle slides. The sliding conveyor belt is reliably translated to reduce the belt speed, thereby adjusting the operating state of the motor of the belt conveyor and implementing effective damping braking. When multiple hydraulic damping devices for the overspeed protection of the belt conveyor participate in the overspeed protection of the belt conveyor, the number and fitting degree of the hydraulic damping devices for the overspeed protection of the belt conveyor participating in the damping can also be adjusted in a timely manner according to the actual working conditions, so that the operation of the conveyor is controllable and reliable, and the whole has the advantages of stable action, good damping effect, not easy to misoperate, and flexible and reliable use.

[0027] Second Embodiment: Based on the hydraulic damping device for the overspeed protection of a belt conveyor provided in the first embodiment of the present application, the second embodiment of the present application proposes another hydraulic damping device for the overspeed protection of a belt conveyor. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0028] The following further describes the second embodiment of the present invention in conjunction with the drawings and embodiments.

[0029] Please refer to Figures 5 - 10, the hydraulic damping device for the over-speed protection of the belt conveyor further includes a trough-shaped hanger 7 fixedly installed at the bottom of the trough-shaped frame 5. A main air duct 8 is fixedly installed inside the trough-shaped hanger 7. A plurality of branch air ducts 9 are fixedly installed on both sides of the main air duct 8. A plurality of exhaust holes 901 are formed in the branch air ducts 9, and each exhaust hole 901 vertically faces the corresponding damping plate 6. An air pump 14 is fixedly installed on one of the bottom beams 1. The air pump 14 is used to convey compressed air into the main air duct 8. An air outlet pipe 13 is fixedly installed at the air outlet of the air pump 14. The air outlet pipe 13 is fixedly connected to the corresponding bottom beam 1. A fixed sleeve 11 is slidably and sealingly sleeved at the end of the air outlet pipe 13 away from the air pump 14. A connecting air duct 10 is fixedly installed at the top of the fixed sleeve 11. The top of the connecting air duct 10 is fixedly connected to the main air duct 8. When the oil cylinder 3 jacks up the trough-shaped frame 5, the trough-shaped hanger 7 rises with the trough-shaped frame 5, thereby driving the connecting air duct 10 to move upward. Driven by the connecting air duct 10, the fixed sleeve 11 will slide upward. A same follow-up trigger mechanism is installed on the fixed sleeve 11 and the corresponding bottom beam 1. The follow-up trigger mechanism is used to trigger the operation of the air pump 14 when the two upper beams 4 and the trough-shaped frame 5 are jacked up. A protective box 15 is fixedly installed at the top of the corresponding bottom beam 1. The follow-up trigger mechanism is located inside the protective box 15, and the protective box 15 can isolate and protect the follow-up trigger mechanism.

[0030] In this embodiment, in order to increase the reliability of the fixation of the fixed sleeve 11, a fixing ring is fixedly sleeved on the outer wall of the fixed sleeve 11. A lifting arm 12 is fixedly installed on the outer wall of the fixing ring. The top of the lifting arm 12 is fixedly connected to the bottom of the corresponding upper beam 4.

[0031] In this embodiment, the follow-up trigger mechanism specifically includes a Z-shaped plate 16, a lower conductive block 17, an L-shaped plate 18, a lifting slide bar 19, a limit end plate 20, an upper conductive block 21 and a spring 22. The Z-shaped plate 16 is fixedly installed on the outer wall of the fixed sleeve 11. An avoidance strip opening is provided on one side of the protective box 15 close to the fixed sleeve 11. The Z-shaped plate 16 passes through the avoidance strip opening and is movably connected to the avoidance strip opening. A lower insulating plate is fixedly installed on the Z-shaped plate 16, and the lower conductive block 17 is fixedly installed on the top of the lower insulating plate. The L-shaped plate 18 is fixedly installed on the top of the corresponding bottom beam 1. The lifting slide bar 19 passes through and is slidably installed on the L-shaped plate 18. The bottom end of the lifting slide bar 19 is fixedly installed with an upper insulating plate, and the upper conductive block 21 is fixedly installed on the bottom of the upper insulating plate. The distance between the upper conductive block 21 and the lower conductive block 17 is maintained at 2-3 mm, and the two form a "normally open contact", which is connected in series in the power-on control circuit of the air pump 14. When the lower conductive block 17 moves upward a certain distance following the Z-shaped plate 16, it will contact the upper conductive block 21, and the "normally open contact" closes, and the air pump 14 can be powered on and operated. The spring 22 is sleeved on the lifting slide bar 19. The top end of the spring 22 is fixedly connected to the L-shaped plate 18, and the lower end is fixedly connected to the lower insulating plate. The limit end plate 20 is fixedly installed at the top end of the lifting slide bar 19. After the lower conductive block 17 rises a very small distance, it contacts the upper conductive block 21. During the subsequent upward movement, the lifting slide bar 19 slides upward under the action of the contact force, and the spring 22 will be compressed. Under the elastic force of the spring 22, the two conductive blocks can be kept in close contact.

[0032] In this embodiment, in order to facilitate the maintenance of the relevant components of the follow-up trigger mechanism, a maintenance opening is provided on the protective box 15. A maintenance plug board 151 is slidably installed in the maintenance opening. A handle is fixedly installed on the top of the maintenance plug board 151. Hold the handle and lift the maintenance plug board 151 upward, and it can be pulled out from the maintenance opening, so that the maintenance opening can be completely opened.

[0033] In this embodiment: During the process of jacking up the two upper beams 4 and the trough-shaped frame 5, the trough-shaped hanging bracket 7, the main air duct 8, multiple branch air ducts 9, etc. will also rise simultaneously with the trough-shaped frame 5. The boom 12 also drives the connecting air duct 10 to rise, causing the fixed sleeve 11 to slide upward. The fixed sleeve 11 drives the Z-shaped plate 16 to rise, which will make the lower conductive block 17 contact the upper conductive block 21. In this way, the air pump 14 will be powered on and operate. After the damping plate 6 contacts the bottom of the conveyor belt, friction will be generated, generating a large amount of heat energy, causing the temperature of the damping plate 6 to rise rapidly. After the air pump 14 operates, it will compress the external air and then transport it to the main air duct 8 through the air outlet duct 13, the fixed sleeve 11, and the connecting air duct 10 in sequence. Under the action of the wind pressure, the gas will enter into multiple branch air ducts 9 and finally blow towards the trough-shaped frame 5 and the corresponding damping plate 6 through the exhaust holes 901 on the multiple branch air ducts 9, increasing the air flow velocity, thereby accelerating the heat dissipation rate of the damping plate 6 and avoiding problems such as combustion, excessive oxidation, and aging of the damping plate 6 due to excessive temperature.

[0034] Through the settings of the main air duct 8, multiple branch air ducts 9, connecting air duct 10, fixed sleeve 11, air outlet duct 13, air pump 14, and the follow-up trigger mechanism, when the device performs a damping action, the air pump 14 can be automatically triggered to operate, thereby compressing the external air and transporting it to the main air duct 8. The compressed air finally blows towards the trough-shaped frame 5 and the corresponding damping plate 6 through the exhaust holes 901 on the multiple branch air ducts 9, which can effectively increase the air flow velocity in the bottom area of the damping plate 6, thereby accelerating the heat dissipation rate of the damping plate 6 and avoiding problems such as combustion, excessive oxidation, and aging of the damping plate 6 due to excessive temperature, which is beneficial to improving the service life of the damping plate 6.

[0035] Third Embodiment: Based on the hydraulic damping device for the overspeed protection of the belt conveyor provided in the second embodiment of the present application, the third embodiment of the present application proposes another two hydraulic damping devices for the overspeed protection of the belt conveyor. The third embodiment is merely a preferred manner of the second embodiment, and the implementation of the third embodiment will not affect the independent implementation of the second embodiment.

[0036] The following further describes the third embodiment of the present invention in conjunction with the drawings and embodiments.

[0037] Please refer to Figures 11 - 15, A hydraulic damping device for the overspeed protection of a belt conveyor. The main water pipe 23 is arranged in the trough-shaped frame 5. A plurality of branch water pipes 24 are fixedly installed on both sides of the main water pipe 23. The plurality of branch water pipes 24 are fixedly connected to the trough-shaped hanging brackets 7. Each branch water pipe 24 is located on one side of the corresponding branch air pipe 9. A plurality of atomizing heads 25 are fixedly installed on the plurality of branch water pipes 24. Each atomizing head 25 corresponds to an exhaust hole 901. A diaphragm pump 29 is fixedly installed on the corresponding bottom beam 1. The water inlet of the diaphragm pump 29 is connected to a 30% alcohol source (or can be connected to a water source) through a pipeline. A water outlet pipe 27 is fixedly installed on the water outlet of the diaphragm pump 29. The top end of the water outlet pipe 27 is fixedly installed with a corrugated pipe 28. A connecting water pipe 26 is penetrated and fixedly installed on the boom 12. When the trough-shaped frame 5 and the two upper beams 4 are lifted, the boom 12 drives the connecting water pipe 26 to move upward. The top end of the connecting water pipe 26 is fixedly connected to the main water pipe 23, and the bottom end is fixedly connected to the top end of the corrugated pipe 28. The corrugated pipe 28 can expand and contract and remains connected to the water outlet pipe 27 during the upward movement of the connecting water pipe 26. The diaphragm pump 29 is connected in parallel with the above-mentioned air pump 14. After the lower conductive block 17 comes into contact with the upper conductive block 21, the diaphragm pump 29 is also powered on and operates. The diaphragm pump 29 extracts external alcohol and pumps the alcohol into the main water pipe 23 through the water outlet pipe 27, the corrugated pipe 28, and the connecting water pipe 26 in sequence. Under the action of water pressure, the alcohol in the main water pipe 23 is dispersed into each branch water pipe 24 and finally atomized and sprayed out through a plurality of atomizing heads 25.

[0038] In this embodiment, in order to centrally recover and discharge the sprayed alcohol or water, a water receiving tank 31 located below the trough-shaped hanging bracket 7 is fixedly installed at the bottom of the trough-shaped frame 5. An L-shaped drain pipe is fixedly installed at the bottom of the water receiving tank 31, and a drain hose is fixedly installed at the bottom end of the L-shaped drain pipe.

[0039] In this embodiment, in order to increase the stability of the installation of the connecting water pipe 26, a hanging plate is fixedly sleeved on the connecting water pipe 26, and the hanging plate is fixedly connected to the corresponding upper beam 4.

[0040] In this embodiment, in order to prevent alcohol or water from entering the protection box 15, two inserting cylinders are fixedly installed at the top of the protection box 15. Two inserting rods are slidably installed in the two inserting cylinders. The top ends of the two inserting rods are fixedly installed with the same triangular baffle 30. Hold the triangular baffle 30 and pull it upward, and the two inserting rods can be withdrawn from the corresponding inserting cylinders. Then the triangular baffle 30 can be taken away. After the triangular baffle 30 is taken away, it will not affect the removal of the maintenance inserting plate 151.

[0041] In this embodiment: When the device performs damping action and the trough-shaped frame 5 and the two upper beams 4 are lifted, the main water pipe 23 and the multiple branch water pipes 24 will rise along with the trough-shaped hanger 7. At the same time, the boom 12 drives the connecting water pipe 26 and the fixed sleeve 11 to move upward. The corrugated pipe 28 can expand and contract, and remains connected to the water outlet pipe 27 during the upward movement of the connecting water pipe 26. Driven by the fixed sleeve 11, the Z-shaped plate 16 moves upward, causing the lower conductive block 17 to contact the upper conductive block 21, and both the diaphragm pump 29 and the air pump 14 will be powered on and operate. The diaphragm pump 29 pumps the external alcohol, and pumps the alcohol into the main water pipe 23 through the water outlet pipe 27, the corrugated pipe 28, and the connecting water pipe 26 in sequence. Under the action of water pressure, the alcohol in the main water pipe 23 is dispersed into each branch water pipe 24 and finally atomized and ejected through the multiple atomizing heads 25, spraying towards the bottom of the trough-shaped frame 5 and the damping plate 6, thereby cooling the damping plate 6. Along with the high-speed air flow discharged from the exhaust hole 901, the alcohol can volatilize faster, and then further improve the cooling effect on the damping plate 6.

[0042] Through the arrangement of components such as the main water pipe 23, the multiple branch water pipes 24, the multiple atomizing heads 25, the connecting water pipe 26, the water outlet pipe 27, the corrugated pipe 28, and the diaphragm pump 29, when the device performs damping action, the diaphragm pump 29 can be automatically triggered to operate, pumping 30% external alcohol into the main water pipe 23. The alcohol is finally atomized and ejected through the atomizing heads 25 on the branch water pipes 24 under the action of water pressure, spraying towards the bottom of the trough-shaped frame 5 and the damping plate 6, so that the damping plate 6 can be cooled. Cooperating with the high-speed air flow discharged from the exhaust hole 901, the alcohol can volatilize faster, further improving the cooling effect on the damping plate 6 and further increasing the service life of the damping plate 6.

[0043] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A hydraulic damping device for over-speed protection of a belt conveyor, comprising two bottom beams (1), characterized in that, Above the two bottom beams (1), two upper beams (4) are respectively arranged. A same trough-shaped frame (5) is fixedly installed between the two upper beams (4). On the top of each of the two bottom beams (1), two oil cylinder seats (2) are fixedly installed. The four oil cylinder seats (2) are distributed in a rectangular array. An oil cylinder (3) is installed in each of the four oil cylinder seats (2). The output ends of the four oil cylinders (3) are fixedly connected to the bottom of the corresponding upper beam (4). Three damping plates (6) are fixedly installed in the trough-shaped frame (5).

2. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 1, characterized in that, The damping plate (6) is made of rubber material.

3. The hydraulic damping device for the overspeed protection of a belt conveyor according to claim 1, characterized in that, A trough-shaped hanger (7) is fixedly installed at the bottom of the trough-shaped frame (5). A main air duct (8) is fixedly installed in the trough-shaped hanger (7). A plurality of branch air ducts (9) are fixedly installed on both sides of the main air duct (8). A plurality of exhaust holes (901) are formed in the branch air ducts (9). An air pump (14) is fixedly installed on one of the bottom beams (1). An air outlet pipe (13) is fixedly installed at the air outlet of the air pump (14). A fixed sleeve (11) is slidably and sealingly sleeved at one end of the air outlet pipe (13) far away from the air pump (14). A connecting air duct (10) is fixedly installed at the top end of the fixed sleeve (11). The top end of the connecting air duct (10) is fixedly connected to the main air duct (8). A same follow-up trigger mechanism is installed on the fixed sleeve (11) and the corresponding bottom beam (1). A protective box (15) is fixedly installed at the top of the corresponding bottom beam (1). The follow-up trigger mechanism is located in the protective box (15).

4. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 3, wherein A fixed ring is fixedly sleeved on the outer wall of the fixed sleeve (11). A lifting arm (12) is fixedly installed on the outer wall of the fixed ring. The top of the lifting arm (12) is fixedly connected to the bottom of the corresponding upper beam (4).

5. The hydraulic damping device for the overspeed protection of a belt conveyor according to claim 4, characterized in that, The follow-up trigger mechanism includes a Z-shaped plate (16), a lower conductive block (17), an L-shaped plate (18), a lifting slide rod (19), a limit end plate (20), an upper conductive block (21) and a spring (22). The Z-shaped plate (16) is fixedly installed on the outer wall of the fixed sleeve (11). A lower insulating plate is fixedly installed on the Z-shaped plate (16). The lower conductive block (17) is fixedly installed on the top of the lower insulating plate. The L-shaped plate (18) is fixedly installed on the top of the corresponding bottom beam (1). The lifting slide rod (19) penetrates through and is slidably installed on the L-shaped plate (18). An upper insulating plate is fixedly installed at the bottom end of the lifting slide rod (19). The upper conductive block (21) is fixedly installed on the bottom of the upper insulating plate. The spring (22) is sleeved on the lifting slide rod (19). The top end of the spring (22) is fixedly connected to the L-shaped plate (18), and the lower end is fixedly connected to the lower insulating plate. The limit end plate (20) is fixedly installed at the top end of the lifting slide rod (19).

6. The hydraulic damping device for the overspeed protection of a belt conveyor according to claim 3, characterized in that, An inspection opening is formed in the protective box (15). An inspection plug board (151) is slidably installed in the inspection opening. A handle is fixedly installed at the top of the inspection plug board (151).

7. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 5, wherein, A main water pipe (23) is further arranged inside the trough-shaped frame (5). A plurality of branch water pipes (24) are fixedly installed on both sides of the main water pipe (23). A plurality of atomizing heads (25) are fixedly installed on each of the plurality of branch water pipes (24). A diaphragm pump (29) is fixedly installed on the corresponding bottom beam (1). A water outlet pipe (27) is fixedly installed on the water outlet of the diaphragm pump (29). A corrugated pipe (28) is fixedly installed at the top end of the water outlet pipe (27). A connecting water pipe (26) penetrates through and is fixedly installed on the boom (12). The top end of the connecting water pipe (26) is fixedly connected to the main water pipe (23), and the bottom end is fixedly connected to the top end of the corrugated pipe (28).

8. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 7, wherein, A water receiving trough (31) located below the trough-shaped hanging frame (7) is fixedly installed at the bottom of the trough-shaped frame (5). An L-shaped drain pipe is fixedly installed at the bottom of the water receiving trough (31). A drain hose is fixedly installed at the bottom end of the L-shaped drain pipe.

9. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 7, characterized in that, A hanging plate is fixedly sleeved on the connecting water pipe (26). The hanging plate is fixedly connected to the corresponding upper beam (4).

10. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 7, characterized in that, Two inserting cylinders are fixedly installed at the top of the protection box (15). Inserting rods are slidably installed in each of the two inserting cylinders. The top ends of the two inserting rods are fixedly installed with the same triangular baffle (30).

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