A discharge hopper clamping device

Abstract

The application discloses a discharging hopper clamping device which is assembled to the discharging port of the discharging hopper and comprises a valve assembly and a positioning assembly. The valve assembly adjusts the opening and closing posture of the discharging port by turning over; and the positioning assembly positions and locks the valve assembly when the valve assembly is closed. The positioning assembly comprises a limiting mechanism, a self-locking mechanism and an unlocking mechanism. The limiting mechanism cooperates with the valve assembly in the closed state to realize locking; the self-locking mechanism realizes one-way self-locking of the limiting mechanism; and the unlocking mechanism controls unlocking of the self-locking mechanism. The cooperation of the mechanical locking and the self-locking mechanism can keep the valve assembly reliably closed when the hydraulic system fails, effectively prevent material leakage, and transfer the material gravity load to the assembly platform, thereby avoiding overload of the driving mechanism. The device has the characteristics of reliable locking, strong bearing capacity, good sealing performance and convenient operation, and is suitable for temporary storage and transfer of powder and slurry.

Description

Technical Field

[0001] This invention relates to the field of material loading and unloading equipment technology, specifically a hopper clamping device. Background Technology

[0002] As a common material storage and transfer device, the unloading hopper is widely used in industries such as construction, mining, metallurgy, and chemical engineering. It is especially suitable for on-site storage and directional unloading of powder, slurry, or granular materials. In practical use, the bottom of the unloading hopper is usually equipped with a discharge port, which is used in conjunction with valve plates or gates to control the opening and closing status of the discharge port, so as to meet the needs of material loading, transfer, and fixed-point unloading.

[0003] Currently, common methods for controlling the opening and closing of unloading hoppers mostly employ manual slide gate valves, pneumatically or hydraulically driven tilting valve plates. Among these, hydraulically driven tilting valve plates are widely used in large-scale or frequently operating scenarios due to their advantages such as convenient operation, smooth opening and closing, and ease of remote control. However, existing tilting valve plate structures still have many technical problems in practical use.

[0004] Most unloading hopper valves rely solely on the thrust of a hydraulic cylinder to maintain their closed position, lacking an effective mechanical positioning and locking mechanism. When the hydraulic system experiences a decrease in thrust due to leakage, pressure loss, or malfunction, the valve may open on its own under the weight of the material, causing material leakage and affecting construction safety and environmental cleanliness.

[0005] In the closed state, the valve plate needs to withstand the large static pressure and dynamic impact load generated by the material above. If there is no reasonable external load transfer path, long-term use can easily lead to valve plate deformation, damage to hinge points, or failure of hydraulic cylinder seals, thereby reducing the service life of the equipment.

[0006] Powder or slurry is prone to leakage from the valve plate joint gap and the gap between the valve plate and the outer wall of the discharge cylinder. In the existing structure, the clamping force after the valve plate is closed mainly relies on the drive mechanism, and there is a lack of an independent positioning and locking device to maintain a stable sealing and compression state. As a result, the sealing elements (such as wear-resistant rubber gaskets) cannot maintain effective deformation for a long time, increasing the risk of leakage. Summary of the Invention

[0007] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide a hopper clamping device that can reliably position and lock the tilting valve plate of the hopper, effectively share the gravity load of the material, improve the sealing stability, and facilitate unlocking and resetting. It has important engineering practical value.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned objective is: a hopper clamping device, which is assembled at the discharge port of the hopper and used to control its opening and closing posture, including a valve assembly and a positioning assembly. The opening and closing of the discharge port is adjusted by controlling the flipping posture of the valve assembly. The positioning assembly is assembled on the hopper and used to position and lock the valve assembly in the closed posture.

[0009] The positioning component includes a limiting mechanism, a self-locking mechanism, and an unlocking mechanism. The limiting mechanism is matched with the valve assembly in the closed state to lock the valve assembly in position. The self-locking mechanism is matched with the limiting mechanism and is used to perform one-way self-locking on the limiting mechanism. The unlocking mechanism is matched with the self-locking mechanism and is used to control the self-locking mechanism to perform the unlocking action.

[0010] Based on the above technical solutions, in order to ensure that the unloading hopper can effectively load materials so that the materials can be unloaded in a directional manner, and at the same time ensure that the valve assembly and positioning assembly can be stably assembled and operated on the unloading hopper, the following technical solutions are provided.

[0011] The bottom of the unloading hopper is a tapered structure that is wider at the top and narrower at the bottom. A cylindrical unloading cylinder is fixedly connected to the bottom of the unloading hopper. The unloading port is located at the bottom of the unloading cylinder. An assembly platform is provided around the unloading cylinder.

[0012] Based on the above technical solutions, in order to ensure that the valve assembly in the closed state can effectively seal and clamp the discharge port and prevent leakage of the loaded material, the following technical solutions are provided.

[0013] The valve assembly includes two sets of symmetrically arranged valve plates, each valve plate having a semi-circular arc-shaped baffle fixedly attached thereto, and the inner walls of the valve plates and the arc-shaped baffles being provided with wear-resistant rubber pads.

[0014] When the valve assembly is in the closed position, the two sets of valve plates remain aligned and in sealed contact with the end wall of the discharge port. The two sets of arc-shaped baffles are assembled into a ring structure and in sealed contact with the outer wall of the discharge cylinder. The assembly platform is arranged above the arc-shaped baffles.

[0015] Based on the above technical solutions, in order to ensure that the valve assembly can be stably assembled on the unloading hopper and to achieve stable adjustment of the opening and closing posture, the following technical solutions are provided.

[0016] The valve assembly also includes two sets of symmetrically arranged hydraulic telescopic cylinders. The valve plate is provided with a connecting bracket and a lower ear seat. The connecting bracket is hinged to the assembly platform. The outer wall of the unloading cylinder is provided with two sets of symmetrically arranged upper ear seats. The two ends of the hydraulic telescopic cylinder are respectively hinged to the upper ear seat and the lower ear seat on the same side.

[0017] Based on the above technical solutions, in order to ensure the structural strength of the arc-shaped baffle and the valve plate, and to ensure that the valve plate and the arc-shaped baffle do not interfere with the spatial movement of the unloading cylinder and the assembly platform during the flipping and opening process, the following technical solutions are provided.

[0018] The connecting bracket is fixedly connected to the arc-shaped baffle and the valve plate. The hinge point between the connecting bracket and the assembly platform is located on the outside of the arc-shaped baffle, and the hinge point between the connecting bracket and the assembly platform is not lower than the high point of the arc-shaped baffle.

[0019] Based on the above technical solutions, in order to ensure that the positioning component can be stably assembled onto the unloading hopper and to effectively position and lock the two sets of valve plates and the arc-shaped baffle in the valve assembly so that the valve assembly is in a clamped state, the following technical solutions are provided.

[0020] The positioning components are assembled onto the assembly platform and include two symmetrically arranged sets. The two sets of positioning components respectively position and lock the two sets of arc-shaped baffles. Each set of positioning components includes two sets of symmetrically arranged limiting mechanisms, self-locking mechanisms, and unlocking mechanisms. The two sets of limiting mechanisms respectively cooperate with and position the two sets of arc-shaped baffles in the closed state.

[0021] Based on the above technical solutions, the following technical solutions are provided to ensure that the limiting mechanism can effectively position and lock the valve plate and the arc-shaped baffle, and can share the gravity load of the material on the valve plate, so as to prevent the material from opening the valve assembly and causing leakage under its own gravity.

[0022] The limiting mechanism includes a mounting shaft and an upper positioning hook and a lower positioning hook fixed to the mounting shaft and arranged in opposite directions. The bottom of the assembly platform is provided with an upper positioning pin that is matched with the upper positioning hook, and the outer wall of the arc-shaped baffle is fixed with a lower positioning pin that is matched with the lower positioning hook.

[0023] Based on the above technical solutions, the following technical solution is provided to ensure that the two sets of limit mechanisms in the control positioning component always operate in reverse synchronously.

[0024] A transmission bevel gear is fixedly connected to the mounting shaft. Both sets of transmission bevel gears are meshed with drive bevel gears that are arranged symmetrically. The two sets of drive bevel gears are coaxially fixedly connected through the transmission shaft. The transmission shaft is poweredly connected to a drive motor that is fixedly installed on the assembly platform.

[0025] Based on the above technical solutions, in order to ensure that the self-locking mechanism can be matched with the limiting mechanism and to achieve unidirectional self-locking of the limiting mechanism to limit its invalid displacement, the following technical solutions are provided.

[0026] The self-locking mechanism includes an inner ratchet, a pawl, a locking gear, and a locking key. The pawl is rotatably mounted to the periphery of the mounting shaft. The pawl is arranged around the mounting shaft and maintains a matching engagement with the mounting shaft. A return torsion spring is mounted on the mounting shaft. The locking gear is located around the inner ratchet. A support spring is connected to the locking key and arranged radially along the locking gear. The locking key and the gear maintain a nested locking.

[0027] Based on the above technical solutions, in order to ensure that the unlocking mechanism can be matched with the self-locking mechanism and used to control the self-locking mechanism to unlock, so that the limit mechanism can be unlocked and reset under the action of the reset torsion spring, the following technical solution is provided.

[0028] The unlocking mechanism includes an unlocking pin, a return spring, and an electromagnet and a permanent magnet arranged coaxially. The unlocking pin is slidably mounted on the assembly platform and abuts against the return spring. The electromagnet is fixedly mounted on the assembly platform. The permanent magnet is coaxially fixed to the unlocking pin and is arranged opposite to the electromagnet. The locking key has a wedge-shaped groove, and the end of the unlocking pin has a wedge-shaped head that abuts against the wedge-shaped groove.

[0029] The beneficial effects of this invention are: 1. This invention, by incorporating a positioning component, achieves bidirectional limiting and locking of the valve plate and arc-shaped baffle when the valve assembly is in a closed position. This is achieved by the upper and lower positioning hooks in the limiting mechanism engaging with the upper and lower positioning pins, respectively. Simultaneously, the self-locking mechanism employs a combination design of an internal ratchet and pawl with a locking gear and locking key, enabling unidirectional self-locking of the limiting mechanism and preventing accidental reversal under external force or vibration. Even in the event of hydraulic system depressurization or drive failure, the valve assembly maintains a reliable closed clamping state, significantly reducing the risk of powder or slurry leakage from the discharge port.

[0030] 2. In the closed state, the gravity load of the material on the valve plate is sequentially transferred to the assembly platform through the lower positioning pin, lower positioning hook, upper positioning hook, and upper positioning pin, and the load is shared by the overall structure, avoiding direct application of gravity load to the hydraulic telescopic cylinder or hinge point. This design not only reduces the load on the drive mechanism but also improves the structural stability and fatigue resistance of the valve assembly under long-term high-load conditions, extending the overall service life of the equipment.

[0031] 3. After the two sets of valve plates and the arc-shaped baffle in the valve assembly are closed, the wear-resistant rubber pad on the inner side of the valve plate maintains stable compression deformation under the continuous locking force provided by the positioning component. This effectively seals the gap between the valve plates and the arc-shaped baffle and the outer wall of the unloading cylinder. Simultaneously, the fitting design between the top of the arc-shaped baffle and the lower surface of the assembly platform further improves the sealing effect, making it particularly suitable for the temporary storage and transfer of easily leaking materials such as fine powders and highly fluid slurries.

[0032] 4. The unlocking mechanism uses an electromagnet and a permanent magnet to drive the unlocking pin. Through the linkage between the wedge head and the wedge groove, the nested locking state of the locking key and the locking gear can be quickly released, and the limit mechanism can be automatically reset and unlocked under the action of the reset torsion spring.

[0033] 5. This invention incorporates multiple design features, including a positioning component that shares the gravity load, a self-locking mechanism to prevent accidental reversal, and an unlocking mechanism that supports independent control, forming a comprehensive safety redundancy mechanism. Even if the hydraulic telescopic cylinder is damaged or its power is interrupted, the valve assembly can still be effectively locked by the positioning component, preventing large-scale material leakage or safety accidents caused by accidental opening of the valve plate, thus improving the safety and reliability of the equipment in harsh construction environments. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention assembled on the unloading hopper and in a closed clamping state; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 This is a schematic diagram of the valve assembly. Figure 4 This is a structural diagram of the positioning component in the assembled and clamped state. Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 A structural diagram showing the combination of various mechanisms in the positioning component; Figure 7 This is a structural diagram of the limit mechanism and self-locking mechanism in their disassembled state. Figure 8 This is a structural diagram showing the limit mechanism and self-locking mechanism in a further disassembled state. Figure 9 This is a structural diagram showing the disassembled state of the unlocking mechanism and the self-locking mechanism.

[0035] In the diagram: 1. Unloading hopper, 11. Unloading cylinder, 111. Upper ear seat, 112. Reinforcing rib plate, 12. Assembly platform, 121. Upper positioning pin, 122. Mounting bracket, 2. Valve assembly, 21. Valve plate, 211. Arc-shaped baffle, 212. Wear-resistant rubber pad, 213. Connecting bracket, 214. Lower ear seat, 215. Conical thickened structure, 216. Lower positioning pin, 22. Hydraulic telescopic cylinder, 3. Positioning assembly, 311. Mounting shaft, 312. Upper positioning hook, 313. Lower positioning hook, 314. Transmission bevel gear, 315. Drive bevel gear, 316. Transmission shaft, 317. Drive motor, 321. Internal ratchet, 322. Pawl, 323. Locking gear, 324. Locking key, 325. Return torsion spring, 326. Support spring, 327. Spring leaf, 328. Wedge groove, 331. Unlocking pin, 332. Return spring, 333. Electromagnet, 334. Permanent magnet, 335. Wedge head, 336. Guide shaft. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0037] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 A hopper clamping device is assembled at the discharge port of the hopper 1 and used to control its opening and closing posture. It includes a valve assembly 2 and a positioning assembly 3. The opening and closing of the discharge port is adjusted by controlling the flipping posture of the valve assembly 2. The positioning assembly 3 is assembled on the hopper 1 and used to position and lock the valve assembly 2 in the closed posture.

[0038] The positioning component 3 includes a limiting mechanism, a self-locking mechanism, and an unlocking mechanism. The limiting mechanism is matched with the valve component 2 in the closed state to lock the valve component 2. The self-locking mechanism is matched with the limiting mechanism and is used to perform one-way self-locking on the limiting mechanism. The unlocking mechanism is matched with the self-locking mechanism and is used to control the self-locking mechanism to perform the unlocking action.

[0039] The unloading hopper 1 is typically used to load building materials used in construction, usually powders or slurries, as a temporary storage container for immediate use on the construction site. Alternatively, it can be used as a material transfer device to carry and transfer powders or slurries to the construction site.

[0040] The clamping device provided in this solution controls the opening and closing posture of the unloading hopper 1 by adjusting the flipping of the valve assembly 2. When the valve assembly 2 is in the closed posture, the positioning assembly 3 locks and positions the valve assembly 2 to ensure that the valve assembly 2 always maintains a closed clamping posture, so as to prevent the material loaded in the unloading hopper 1 from leaking out of the gap of the valve assembly 2 at the unloading port. At the same time, it can also effectively bear the gravity load of the material on the valve assembly 2 in the closed state, so as to prevent the valve assembly 2 from malfunctioning or being damaged. Example

[0041] Please see Figures 1-3 To ensure that the unloading hopper 1 can effectively load materials so that the materials can be unloaded in a directional manner, and to ensure that the valve assembly 2 and the positioning assembly 3 can be stably assembled and operated on the unloading hopper 1, the following technical solutions are provided.

[0042] The bottom of the unloading hopper 1 is a tapered structure that is wider at the top and narrower at the bottom. The bottom of the unloading hopper 1 is fixedly connected to an unloading cylinder 11, which is a cylindrical structure. The unloading port is located at the bottom of the unloading cylinder 11. An assembly platform 12 is provided around the unloading cylinder 11.

[0043] The bottom of the unloading hopper 1 is designed as a conical structure that is wider at the top and narrower at the bottom. During the unloading operation, it can ensure that the loaded material is effectively transferred to the unloading cylinder 11 at the bottom, and then discharged through the unloading port to achieve the unloading operation.

[0044] The unloading hopper 1, the unloading cylinder 11, and the assembly platform 12 are all assembled and welded from iron materials. The assembly platform 12 provides a stable mounting carrier for the valve assembly 2 and the positioning assembly 3, thereby ensuring that each component operates stably according to the set requirements.

[0045] To ensure that the valve assembly 2 in the closed state can effectively seal and clamp the discharge port and prevent leakage of the loaded material, the following technical solution is provided.

[0046] The valve assembly 2 includes two sets of symmetrically arranged valve plates 21. A semi-circular arc-shaped baffle 211 is fixedly connected to the valve plate 21. Wear-resistant rubber pads 212 are provided on the inner sidewalls of the valve plate 21 and the arc-shaped baffle 211.

[0047] When the valve assembly 2 is in the closed position, the two sets of valve plates 21 remain connected and in sealed contact with the end wall of the discharge port. The two sets of arc-shaped baffles 211 are assembled into a ring structure and in sealed contact with the outer wall of the discharge cylinder 11. The assembly platform 12 is arranged above the arc-shaped baffles 211.

[0048] When the valve plate 21 and the arc-shaped baffle 211 thereon are connected and combined, they can effectively block the discharge port and the outer wall of the discharge cylinder 11. Under the positioning and locking of the positioning component 3, the two sets of valve plates 21 in the closed state are clamped together and the wear-resistant rubber pad 212 on its inner side is squeezed and deformed to effectively seal the connection gap between the two sets of valve plates 21 and the arc-shaped baffle 211, thereby effectively preventing the leakage of powder and slurry.

[0049] When the valve assembly 2 is in the closed state, the top of the arc-shaped baffle 211 can maintain a sealed fit with the lower surface of the assembly platform 12 to further improve its sealing effect.

[0050] In practical applications, since the unloading hopper 1 is a temporary storage or transfer container, even if a small amount of powder or slurry leaks at the gaps in the valve assembly 2, it is within the tolerable loss under construction conditions and does not affect its design function of temporarily storing or transferring materials. Example

[0051] Please see Figures 1-3 To ensure that the valve assembly 2 can be stably assembled on the unloading hopper 1 and to achieve stable adjustment of the opening and closing posture, the following technical solution is provided.

[0052] The valve assembly 2 also includes two sets of symmetrically arranged hydraulic telescopic cylinders 22. The valve plate 21 is provided with a connecting bracket 213 and a lower ear seat 214. The connecting bracket 213 is hinged to the assembly platform 12. The outer wall of the unloading cylinder 11 is provided with two sets of symmetrically arranged upper ear seats 111. The two ends of the hydraulic telescopic cylinder 22 are respectively hinged to the upper ear seat 111 and the lower ear seat 214 on the same side.

[0053] The upper ear seat 111 and the lower ear seat 214 ensure the stable assembly of the hydraulic telescopic cylinder 22, while the connecting bracket 213 enables the valve plate 21 and the assembly platform 12 to be stably assembled by relative rotation.

[0054] When the hydraulic telescopic cylinder 22 is controlled to extend and retract, it can drive the corresponding valve plate 21 and the arc-shaped baffle 211 to rotate stably around the hinge point of the connecting bracket 213, thereby achieving effective adjustment of the opening and closing posture of the unloading port.

[0055] To ensure the structural strength of the arc-shaped baffle 211 and the valve plate 21, and to ensure that the valve plate 21 and the arc-shaped baffle 211 do not interfere with the spatial movement of the unloading cylinder 11 and the assembly platform 12 during the flipping and opening process, the following technical solution is provided.

[0056] The connecting bracket 213 is fixedly connected to the arc-shaped baffle 211 and the valve plate 21. The hinge point between the connecting bracket 213 and the assembly platform 12 is located on the outside of the arc-shaped baffle 211, and the hinge point between the connecting bracket 213 and the assembly platform 12 is not lower than the high point of the arc-shaped baffle 211.

[0057] The two ends of the connecting bracket 213 are welded to the outer wall of the arc-shaped baffle 211 and the valve plate 21 respectively to provide stable support for the arc-shaped baffle 211, thereby improving the lateral load resistance of the arc-shaped baffle 211.

[0058] The hinge point between the connecting bracket 213 and the assembly platform 12 is set outside the arc-shaped baffle 211 and extends beyond the high point of the arc-shaped baffle 211. When the control valve plate 21 and the arc-shaped baffle 211 rotate around the hinge point of the connecting bracket 213, the movement trajectory of each node on them does not overlap with the unloading cylinder 11 and the assembly platform 12, thereby avoiding spatial movement interference between the opening and closing operation of the valve assembly 2 and the unloading cylinder 11 and the assembly platform 12.

[0059] It should also be noted that the assembly platform 12 and the outer wall of the unloading cylinder 11 are welded with reinforcing ribs 112 to ensure the structural strength of the assembly platform 12. A conical thickened structure 215 is provided between the arc-shaped baffle 211 and the unloading plate to ensure the structural stability of the connection between the two. Example

[0060] Please see Figures 1-7 To ensure that the positioning component 3 can be stably assembled onto the unloading hopper 1 and to effectively position and lock the two sets of valve plates 21 and the arc-shaped baffle 211 in the valve assembly 2 so that the valve assembly 2 is in a clamped state, the following technical solution is provided.

[0061] The positioning component 3 is assembled onto the assembly platform 12 and includes two symmetrically arranged sets. The two sets of positioning components 3 respectively position and lock the two sets of arc-shaped baffles 211. Each set of positioning components 3 includes two sets of symmetrically arranged limiting mechanisms, self-locking mechanisms, and unlocking mechanisms. The two sets of limiting mechanisms respectively cooperate with and position the two sets of arc-shaped baffles 211 in the closed state.

[0062] Two sets of positioning components 3 are respectively arranged on both sides of the valve assembly 2, and are used to position and lock the two sets of arc-shaped baffles 211 and the valve plate 21 that is fixedly connected to the arc-shaped baffles 211 in the closed state.

[0063] For the positioning component 3, the two sets of limiting mechanisms always rotate synchronously in opposite directions to cooperate with the two sets of arc-shaped baffles 211 and valve plates 21 that maintain symmetrical movement, thereby effectively positioning and locking the valve component 2 in the closed state and ensuring that it is always in a clamped state. The self-locking mechanism and unlocking mechanism of each of the two sets of limiting mechanisms are used to control the corresponding limiting mechanism to perform positioning, locking and unlocking actions.

[0064] To ensure that the limiting mechanism can effectively position and lock the valve plate 21 and the arc-shaped baffle 211, and to share the weight load of the material on the valve plate 21, so as to prevent the material from opening the valve assembly 2 and causing leakage under its own weight, the following technical solution is provided.

[0065] The limiting mechanism includes a mounting shaft 311 and an upper positioning hook 312 and a lower positioning hook 313 fixed to the mounting shaft 311 and arranged in opposite directions. The bottom of the assembly platform 12 is provided with an upper positioning pin 121 that is matched with the upper positioning hook 312. The outer wall of the arc-shaped baffle 211 is fixed with a lower positioning pin 216 that is matched with the lower positioning hook 313.

[0066] When the limiting mechanism is in the unlocked state, the upper positioning hook 312 and the lower positioning hook 313 on it are arranged in a horizontal state, and they will not cause spatial movement interference to the arc-shaped baffle 211 and the lower positioning pin 216 on it during the flipping motion. When valve assembly 2 is in the closed state, the control mounting shaft 311 drives the upper positioning hook 312 and the lower positioning hook 313 to rotate, so that the upper positioning hook 312 rests on the top of the upper positioning pin 121 and the lower positioning hook 313 rests on the bottom of the lower positioning pin 216. At this time, the lower positioning hook 313 can provide a limiting effect on the lower positioning pin 216, the arc-shaped baffle 211, and the valve plate 21, thereby limiting their ineffective overturning around the junction point. When the physical load is transferred to valve assembly 2, it can be transferred to the assembly platform 12 through the lower positioning pin 216, the lower positioning hook 313, the upper positioning hook 312, and the upper positioning pin 121. The assembly platform 12 shares the gravity load borne by the valve plate 21 and avoids the limiting mechanism from being damaged by directly bearing the gravity load.

[0067] This design also provides additional safety redundancy. When the hydraulic telescopic cylinder 22 is damaged and its thrust is lost, the gravity load is borne by the positioning component 3 and the assembly platform 12, which can prevent the valve component 2 from accidentally opening and causing material leakage.

[0068] To ensure that the two sets of limit mechanisms in the positioning component 3 always operate in reverse synchronously, the following technical solution is provided.

[0069] A transmission bevel gear 314 is fixedly connected to the mounting shaft 311. Both sets of transmission bevel gears 314 are meshed with drive bevel gears 315 that are arranged symmetrically. The two sets of drive bevel gears 315 are coaxially fixedly connected through a transmission shaft 316. The transmission shaft 316 is poweredly connected to a drive motor 317 that is fixedly installed on the assembly platform 12.

[0070] Two sets of symmetrically arranged bevel gear pairs ensure that the power output of the drive motor 317 drives the mounting shafts 311 in the two sets of limit mechanisms to always keep in synchronous reverse operation. Various types of mounting brackets 122 are also provided at the bottom of the assembly platform 12 to ensure that the drive motor 317 and the various components in the positioning assembly 3 are stably assembled on it.

[0071] The drive motor 317 is typically a geared motor, which amplifies its output torque by reducing speed and increasing torque, thereby driving the limit mechanism to operate stably. Depending on factors such as ease of power supply and application scenario, the drive motor 317 can be replaced with a handwheel or other manually driven component, allowing for manual operation of the limit mechanism. Example

[0072] Please see Figures 4-9 To ensure that the self-locking mechanism can be matched with the limit mechanism and to enable unidirectional self-locking of the limit mechanism to limit its invalid displacement, the following technical solution is provided.

[0073] The self-locking mechanism includes an inner ratchet 321, a pawl 322, a locking gear 323, and a locking key 324. The pawl 322 is rotatably mounted to the periphery of the mounting shaft 311. The pawl 322 is arranged on the periphery of the mounting shaft 311 and maintains a matching engagement with the pawl 322. A return torsion spring 325 is mounted on the mounting shaft 311. The locking gear 323 is located on the periphery of the inner ratchet 321. A support spring 326 is connected to the locking key 324 and is arranged radially along the locking gear 323. The locking key 324 and the gear are nested and locked.

[0074] The aforementioned mounting shaft 311, inner ratchet 321, and locking gear 323 are all rotatably mounted in the mounting bracket 122 at the bottom of the assembly platform 12, while the locking key 324 is slidably mounted in the mounting bracket 122. The mounting shaft 311 operates stably within a specific angular stroke, and the reset torsion spring 325 mounted on it can drive it to rotate in the opposite direction and be in the unlocked state. The pawl 322 is driven by a matching connecting spring 327 to always maintain outward expansion and engage with the ratchet teeth in the inner ratchet 321. When the control limit mechanism rotates to lock and position the valve assembly 2, the pawl 322 and the inner ratchet 321 are in a slipping state. At this time, the mounting shaft 311 can operate normally and overcome the resistance of the reset torsion spring 325 to rotate to the locked state.

[0075] The locking key 324 is driven by the support spring 326 to move radially along the locking gear 323, thereby making the key teeth on the locking key 324 nest and lock with the locking gear 323, thus keeping the inner ratchet 321 locked and unable to rotate normally. At this time, the reset torsion spring 325 cannot drive the mounting shaft 311 to drive the pawl 322 to move in the opposite direction in the inner ratchet 321, so as to achieve one-way locking of the limiting mechanism.

[0076] To ensure that the unlocking mechanism can be matched with the self-locking mechanism and used to control the self-locking mechanism to unlock, so that the limit mechanism can be unlocked and reset under the action of the reset torsion spring 325, the following technical solution is provided.

[0077] The unlocking mechanism includes an unlocking pin 331, a return spring 332, and an electromagnet 333 and a permanent magnet 334 arranged coaxially. The unlocking pin 331 is slidably mounted on the assembly platform 12 and abuts against the return spring 332. The electromagnet 333 is fixedly mounted on the assembly platform 12. The permanent magnet 334 is coaxially fixed to the unlocking pin 331 and is arranged opposite to the electromagnet 333. A wedge-shaped groove 328 is provided on the locking key 324. The end of the unlocking pin 331 is provided with a wedge-shaped head 335 that abuts against the wedge-shaped groove 328.

[0078] A guide shaft 336 is fixedly connected between the unlocking pin 331 and the permanent magnet 334. The guide shaft 336 is slidably mounted on the mounting bracket 122, and the return spring 332 is sleeved around the guide shaft 336, with both ends abutting against the guide shaft 336 and the mounting bracket 122 respectively. When the electromagnet 333 is not energized or is supplied with reverse current, its iron core can attract the permanent magnet 334, and under the action of the return spring 332, the unlocking pin 331 moves away from the locking key 324 under the guidance of the guide shaft 336. At this time, the locking key 324 does not retract the unlocking pin 331 and remains nested and locked with the locking gear 323, thus ensuring that the self-locking mechanism is in a normally locked state.

[0079] When the self-locking mechanism needs to be unlocked, a positive current is applied to the electromagnet 333. At this time, a repulsive force is generated between the permanent magnet 334 and the electromagnet 333, which pushes the unlocking pin 331 to slide towards the locking key 324, overcoming the resistance of the reset spring 332. At this time, the wedge head 335 and the wedge groove 328 cooperate to make the unlocking key overcome the resistance of the support spring 326 and move towards the locking gear 323. The inner ratchet 321 and the locking pin can rotate freely after the locking effect is canceled. Under the action of the reset torsion spring 325, the mounting shaft 311 drives the pawl 322 and the inner ratchet 321 to rotate synchronously in the opposite direction, so as to realize the unlocking and reset of the limit mechanism, so as to facilitate the normal opening of the valve assembly 2 for unloading.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hopper clamping device, characterized in that, The valve assembly (2) and the positioning assembly (3) are assembled at the discharge port of the discharge hopper (1) and used to control its opening and closing posture. The valve assembly (2) is used to adjust the opening and closing of the discharge port by controlling the flipping posture of the valve assembly (2). The positioning assembly (3) is assembled on the discharge hopper (1) and used to position and lock the valve assembly (2) in the closed posture. The positioning component (3) includes a limiting mechanism, a self-locking mechanism, and an unlocking mechanism. The limiting mechanism is matched with the valve component (2) in the closed state to lock the valve component (2) in a positioning manner. The self-locking mechanism is matched with the limiting mechanism and is used to perform one-way self-locking on the limiting mechanism. The unlocking mechanism is matched with the self-locking mechanism and is used to control the self-locking mechanism to perform unlocking action.

2. The unloading hopper clamping device according to claim 1, characterized in that: The bottom of the unloading hopper (1) is a tapered structure that is wider at the top and narrower at the bottom. The bottom of the unloading hopper (1) is fixedly connected to an unloading cylinder (11) that is a cylindrical structure. The unloading port is located at the bottom of the unloading cylinder (11). An assembly platform (12) is provided around the unloading cylinder (11).

3. The unloading hopper clamping device according to claim 2, characterized in that: The valve assembly (2) includes two sets of symmetrically arranged valve plates (21), and an arc-shaped baffle (211) configured as a semicircle is fixedly connected to the valve plate (21). Wear-resistant rubber pads (212) are provided on the inner sidewalls of the valve plate (21) and the arc-shaped baffle (211). When the valve assembly (2) is in a closed position, the two sets of valve plates (21) remain connected and sealed against the end wall of the discharge port. The two sets of arc-shaped baffles (211) are assembled into a ring structure and sealed against the outer wall of the discharge cylinder (11). The assembly platform (12) is arranged above the arc-shaped baffles (211).

4. The unloading hopper clamping device according to claim 3, characterized in that: The valve assembly (2) also includes two sets of symmetrically arranged hydraulic telescopic cylinders (22). The valve plate (21) is provided with a connecting bracket (213) and a lower ear seat (214). The connecting bracket (213) is hinged to the assembly platform (12). The outer wall of the unloading cylinder (11) is provided with two sets of symmetrically arranged upper ear seats (111). The two ends of the hydraulic telescopic cylinder (22) are respectively hinged to the upper ear seat (111) and the lower ear seat (214) on the same side.

5. The unloading hopper clamping device according to claim 4, characterized in that: The connecting bracket (213) is fixedly connected to the arc-shaped baffle (211) and the valve plate (21). The hinge point of the connecting bracket (213) and the assembly platform (12) is located on the outside of the arc-shaped baffle (211), and the hinge point of the connecting bracket (213) and the assembly platform (12) is not lower than the high point of the arc-shaped baffle (211).

6. The unloading hopper clamping device according to claim 3, characterized in that: The positioning component (3) is assembled onto the assembly platform (12) and includes two symmetrically arranged sets. The two sets of positioning components (3) respectively position and lock the two sets of arc-shaped baffles (211). Each set of positioning components (3) includes two sets of symmetrically arranged limiting mechanisms, self-locking mechanisms, and unlocking mechanisms. The two sets of limiting mechanisms respectively cooperate with and position the two sets of arc-shaped baffles (211) in the closed state.

7. A hopper clamping device according to claim 6, characterized in that: The limiting mechanism includes an installation shaft (311) and an upper positioning hook (312) and a lower positioning hook (313) fixed to the installation shaft (311) and arranged in opposite directions. The bottom of the assembly platform (12) is provided with an upper positioning pin (121) that is matched with the upper positioning hook (312). The outer wall of the arc-shaped baffle (211) is fixed with a lower positioning pin (216) that is matched with the lower positioning hook (313).

8. A hopper clamping device according to claim 7, characterized in that: A transmission bevel gear (314) is fixedly connected to the mounting shaft (311). Both sets of transmission bevel gears (314) are meshed with drive bevel gears (315) that are arranged symmetrically. The two sets of drive bevel gears (315) are coaxially fixedly connected through a transmission shaft (316). The transmission shaft (316) is poweredly connected to a drive motor (317) that is fixedly installed on the assembly platform (12).

9. A hopper clamping device according to claim 7, characterized in that: The self-locking mechanism includes an inner ratchet (321), a pawl (322), a locking gear (323), and a locking key (324). The pawl (322) is rotatably mounted to the periphery of the mounting shaft (311). The pawl (322) is arranged around the mounting shaft (311) and is engaged with the mounting shaft (311). A return torsion spring (325) is mounted on the mounting shaft (311). The locking gear (323) is located around the inner ratchet (321). A support spring (326) is connected to the locking key (324) and is arranged radially along the locking gear (323). The locking key (324) is nested and locked with the gear.

10. A hopper clamping device according to claim 9, characterized in that: The unlocking mechanism includes an unlocking pin (331), a return spring (332), and an electromagnet (333) and a permanent magnet (334) arranged coaxially. The unlocking pin (331) is slidably mounted on the assembly platform (12) and abuts against the return spring (332). The electromagnet (333) is fixedly mounted on the assembly platform (12). The permanent magnet (334) is coaxially fixed to the unlocking pin (331) and is arranged opposite to the electromagnet (333). A wedge-shaped groove (328) is provided on the locking key (324). The end of the unlocking pin (331) is provided with a wedge-shaped head (335) that abuts against the wedge-shaped groove (328).

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