A hydraulic damping device for the overspeed protection of a belt conveyor

Abstract

The present invention provides a hydraulic damping device for over-speed protection of a belt conveyor. The hydraulic damping device for over-speed protection of a belt conveyor 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 tops 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 bottoms of the corresponding upper beams, and three damping plates are fixedly installed in the trough-shaped frame. The hydraulic damping device for over-speed protection of a belt conveyor provided by the present invention has the advantages of good damping effect, stable operation, reliable cooling of the damping plates during the damping action, and being beneficial to improving the service life of the damping plates.

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 delamination of the rubber-coated 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 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 cylinder seats are fixedly installed at the top of each of the two bottom beams, the four cylinder seats are distributed in a rectangular array, cylinders are installed in each of the four cylinder seats, the output ends of the four 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 material.

[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 at 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 triggering mechanism is installed on the fixed sleeve and the corresponding bottom beam. A protective box is fixedly installed at the top of the corresponding bottom beam. The follow-up triggering mechanism is located inside the protective box.

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

[0010] Preferably, the follow-up triggering 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 lower 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 at 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 at 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 suspension 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 inserting cylinders are fixedly installed on the top of the protection box. Inserting rods are slidably installed in both of the two inserting cylinders, and the tops of the two inserting rods are fixedly installed with the same triangular baffle plate.

[0016] Compared with the related art, the hydraulic damping device for belt conveyor overspeed protection provided by the present invention has the following beneficial effects:

[0017] The hydraulic damping device for belt conveyor overspeed protection 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 sends an action signal for the hydraulic damping device for belt conveyor overspeed protection. Driven by the oil cylinder, the two upper beams and the trough-shaped frame are driven to rise, so that the damping plates quickly and reliably approach the conveyor belt. The damping plates are used to friction the lower surface of the belt, and rely on the powerful 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 belt conveyor overspeed protection participate in the belt conveyor overspeed protection, the number and fitting degree of the hydraulic damping devices for belt conveyor overspeed protection participating in the damping can also be adjusted in a timely manner according to the actual working conditions, so that the conveyor runs controllably and reliably, and the whole has the advantages of stable action, good damping effect, not easy to misoperate, and flexible and reliable use;

[0018] Through the settings of the main air pipe, multiple branch air pipes, connecting air pipes, fixed sleeves, air outlet pipes, air pumps and the follow-up trigger mechanism, the hydraulic damping device for belt conveyor overspeed protection 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 plates 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 plates, thereby being able to accelerate the heat dissipation speed of the damping plates and avoid problems such as combustion, excessive oxidation and aging of the damping plates due to too high temperature, which is beneficial to improving the service life of the damping plates;

[0019] 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 trough-shaped frame and the bottom of 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

[0020] 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;

[0021] Figure 2 is Figure 1 FIG. 12 is a schematic structural diagram of the hydraulic damping device for the overspeed protection of the belt conveyor shown from another perspective;

[0022] Figure 3 is Figure 1 FIG. 18 is a front view of the hydraulic damping device for the overspeed protection of the belt conveyor shown;

[0023] Figure 4 is Figure 2 FIG. 24 is a schematic structural diagram of the trough-shaped frame shown;

[0024] Figure 5 FIG. 28 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;

[0025] Figure 6 is Figure 5 FIG. 34 is a front view of the hydraulic damping device for the overspeed protection of the belt conveyor shown;

[0026] Figure 7 is Figure 5 FIG. 40 is a distribution schematic diagram of multiple branch air ducts located in the trough-shaped hanger;

[0027] Figure 8 is Figure 5 FIG. 46 is a partial schematic structural diagram shown;

[0028] Figure 9 is located at Figure 8 FIG. 52 is a schematic structural diagram of the follow-up trigger mechanism located in the protective box shown;

[0029] Figure 10 is Figure 8 FIG. 58 is a schematic structural diagram of the protective box and the maintenance access panel in a separated state shown;

[0030] Figure 11 Schematic structural diagram of the third embodiment of the hydraulic damping device for the overspeed protection of a belt conveyor provided by the present invention;

[0031] Figure 12 is Figure 11 Schematic diagram of the distribution of multiple branch water pipes shown in the trough hanger;

[0032] Figure 13 is Figure 12 Enlarged schematic diagram of part A shown in;

[0033] Figure 14 is Figure 12 Front view of components such as the water receiving trough and the trough hanger shown in;

[0034] Figure 15 is Figure 11 Schematic structural diagram of the protective box and the triangular baffle in a separated state shown in;

[0035] 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 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, limiting 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 trough; 151, maintenance plug board; 901, exhaust hole. Specific embodiments

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] First embodiment

[0038] Please refer to Figures 1-4 , in the first embodiment of the present invention, the hydraulic damping device for the overspeed protection of a belt conveyor includes: two bottom beams 1, two upper beams 4 are respectively arranged above the two bottom beams 1, a same trough-shaped frame 5 is fixedly installed between the two upper beams 4, two oil cylinder seats 2 are fixedly installed at the tops of the two bottom beams 1, the four oil cylinder seats 2 are arranged in a rectangular array, oil cylinders 3 are installed in the four oil cylinder seats 2, the output ends of the four oil cylinders 3 are fixedly connected to the bottoms of the corresponding upper beams 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 a standard trough-shaped idler, and is formed by horizontally connecting and welding four sections of bent channel steel, and the height of the channel steel frame is adjustable up and down, generally 5-10 mm lower than the upper surface of the standard idler group.

[0039] The bottom beam 1 is bolted to the side of the frame of the standard belt conveyor. 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 a structure that can both guide and move up and down horizontally.

[0040] In this embodiment, the damping plate 6 is made of rubber, and more specifically, it is made of neoprene, which has good damping performance, wear resistance, and high temperature resistance.

[0041] In this embodiment:

[0042] When the hydraulic damping device for the overspeed protection of the belt conveyor is in use, it is controlled by the main control of the belt conveyor. The speed detection module detects the belt speed parameter of the conveyor belt. Whether the increase in the belt speed reaches overspeed is used as the basis for judging whether "runaway", "skidding", and "rolling material" occur. The obtained parameters are then used to determine the current status of the conveyor by the centralized control PLC program. The main control of the conveyor collects the instantaneous belt speed. When the conveyor belt is overspeed, the main control immediately issues an action signal for the hydraulic damping device for the overspeed protection of the belt conveyor to ensure that no misoperation occurs. The whole process is rapid, stable, reliable, and safe, and will not cause secondary damage to the conveyor belt.

[0043] The hydraulic dampers are arranged on the intermediate frames of the conveyor's loading section at intervals, and the frictional force generated between them and the lower surface of the conveyor belt is used to overcome the downward sliding force generated by the conveyed material. Since the damping plate 6 and the lower surface of the conveyor belt are in relative sliding friction, and its friction coefficient is much larger than the resistance coefficients of the conveyor operation and the idlers. Therefore, by appropriately adjusting the number of damping plates of the hydraulic damping device for the overspeed protection of the belt conveyor participating in damping and the magnitude of the pressure in contact with the conveyor belt, it is equivalent to adjusting the effective length of the contact between the damping plate 6 and the conveyor belt, so that the running resistance of the conveyor belt can be made greater than the downward sliding force generated by the special material, keeping the driving motor working in the electric state, and ensuring the rationality of the layout of the driving device of the downward belt conveyor and the safety of braking.

[0044] 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.

[0045] 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:

[0046] The present invention provides a hydraulic damping device for overspeed protection of a belt conveyor, which is mainly composed of two bottom beams 1, four oil cylinder seats 2, four oil cylinders 3, two upper beams 4, a groove frame 5 and three damping plates 6. When in use, the device 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 "flying", "slipping" and "rolling" occur. When the conveyor belt is overspeeding, the main control sends an action signal of the hydraulic damping device for overspeed protection of the belt conveyor. Under the drive of the oil cylinder 3, the two upper beams 4 and the groove frame 5 are driven to rise, so that the damping plate 6 is quickly and reliably close to the conveyor belt, and the damping plate 6 is used to move the belt conveyor belt to the conveyor belt. Plate 6 rubs against the lower surface of the belt, and relies on the powerful friction braking force to implement damping braking on the downward conveyor belt after slipping, and reliably translates the downward conveyor belt to reduce the belt speed, thereby adjusting the working state of the motor of the belt conveyor and implementing effective damping braking. When multiple hydraulic damping devices for belt conveyor overspeed protection participate in the belt conveyor overspeed protection, the number and fit degree of the hydraulic damping devices for belt conveyor overspeed protection participating in the damping can also be adjusted in time according to actual working conditions, so that the operation of the conveyor can be controlled and reliable, and the overall operation has the advantages of smooth movement, good damping effect, not prone to malfunction, and flexible and reliable use.

[0047] Second embodiment:

[0048] Based on the hydraulic damping device for overspeed protection of belt conveyor provided in the first embodiment of the present application, the second embodiment of the present application proposes another hydraulic damping device for overspeed protection of 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.

[0049] The second embodiment of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] 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. 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. The protective box 15 can isolate and protect the follow-up trigger mechanism.

[0051] 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.

[0052] 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. A side of the protective box 15 close to the fixed sleeve 11 is provided with an avoidance strip opening. 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. 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 lower end of the lifting slide bar 19 is fixedly installed with an upper insulating plate. The upper conductive block 21 is fixedly installed at the bottom of the upper insulating plate. The distance between the upper conductive block 21 and the lower conductive block 17 is kept constant. The spring 22 is mounted on the lifting slide bar 19, the top 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 mounted on the top of the lifting slide bar 19. The lower conductive block 17 contacts the upper conductive block 21 after rising a very small distance. In the subsequent rising process, the lifting slide bar 19 slides upward under the action of the resistance force, and the spring 22 will be compressed. Under the elastic force of the spring 22, the two conductive blocks can maintain close contact.

[0053] In this embodiment, in order to facilitate the maintenance of relevant components of the follow-up trigger mechanism, an inspection port is opened on the protective box 15, and an inspection plug plate 151 is slidably installed in the inspection port. A handle is fixedly installed on the top of the inspection plug plate 151. The inspection plug plate 151 can be lifted up by holding the handle to be pulled out of the inspection port, so that the inspection port can be fully opened.

[0054] In this embodiment:

[0055] During the process of jacking up the two upper beams 4 and the trough-shaped frame 5, the trough-shaped hanging brackets 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 the 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 speed, thereby accelerating the heat dissipation speed of the damping plate 6 and avoiding problems such as combustion, excessive oxidation, and aging of the damping plate 6 due to excessive temperature.

[0056] 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, the present invention can automatically trigger the operation of the air pump 14 when the device performs a damping action, 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 speed in the bottom area of the damping plate 6, thereby accelerating the heat dissipation speed 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.

[0057] Third Embodiment:

[0058] 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.

[0059] The following further describes the third embodiment of the present invention in conjunction with the drawings and embodiments.

[0060] Please refer to Figures 11-15, A hydraulic damping device for the overspeed protection of a belt conveyor is provided with a main water pipe 23 arranged inside a 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 duct 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.

[0061] In this embodiment, in order to be able 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.

[0062] In this embodiment, in order to increase the installation stability 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.

[0063] 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. After that, 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.

[0064] In this embodiment:

[0065] When the device performs damping action and the trough-shaped frame 5 and the two upper beams 4 are lifted, during this process, the main water pipe 23 and 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 bellows 28 can expand and contract, and during the upward movement of the connecting water pipe 26, it remains connected to the water outlet pipe 27. 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 external alcohol, and pumps the alcohol into the main water pipe 23 in sequence through the water outlet pipe 27, the bellows 28, and the connecting water pipe 26. 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 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 airflow discharged from the exhaust hole 901, it can make the alcohol volatilize faster, and then further improve the cooling effect on the damping plate 6.

[0066] Through the arrangement of components such as the main water pipe 23, multiple branch water pipes 24, multiple atomizing heads 25, connecting water pipe 26, water outlet pipe 27, bellows 28, and diaphragm pump 29, when the device performs damping action, it can automatically trigger the operation of the diaphragm pump 29, pump 30% external alcohol into the main water pipe 23, and the alcohol is finally atomized and sprayed out through the atomizing heads 25 on the branch water pipes 24, spraying towards the bottom of the trough-shaped frame 5 and the damping plate 6, enabling the damping plate 6 to be cooled. Cooperating with the high-speed airflow discharged from the exhaust hole 901, it can make the alcohol volatilize faster, further improve the cooling effect on the damping plate 6, and further extend the service life of the damping plate 6.

[0067] The above are only 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 the overspeed 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). 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). One end of the air outlet pipe (13) away from the air pump (14) is slidably and sealingly sleeved with a fixed sleeve (11). 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). A fixed ring is fixedly sleeved on the outer wall of the fixed sleeve (11). A suspension arm (12) is fixedly installed on the outer wall of the fixed ring. The top of the suspension arm (12) is fixedly connected to the bottom of the corresponding upper beam (4). 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). 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 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).

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 the belt conveyor according to claim 1, 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).

4. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 1, wherein A water receiving trough (31) located below the trough-shaped hanger (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.

5. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 1, 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).

6. The hydraulic damping device for the overspeed protection of the belt conveyor according to claim 1, characterized in that, Two inserting cylinders are fixedly installed at the top of the protective 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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